Mercurial > projects > dwt-linux
view dwt/graphics/GC.d @ 199:a5adab24940b
Fix missing string termination, thx nascent for example code.
author | Frank Benoit <benoit@tionex.de> |
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date | Fri, 07 Mar 2008 01:40:43 +0100 |
parents | b6bee07cfc0b |
children | 08789b28bdf3 |
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/******************************************************************************* * Copyright (c) 2000, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwt.graphics.GC; import dwt.graphics.Image; import dwt.DWT; import dwt.DWTException; import dwt.DWTError; import dwt.graphics.Color; import dwt.graphics.Drawable; import dwt.graphics.Resource; import dwt.graphics.Device; import dwt.graphics.Font; import dwt.graphics.FontMetrics; import dwt.graphics.GCData; import dwt.graphics.Image; import dwt.graphics.ImageData; import dwt.graphics.Path; import dwt.graphics.Pattern; import dwt.graphics.Point; import dwt.graphics.RGB; import dwt.graphics.Rectangle; import dwt.graphics.Region; import dwt.graphics.Resource; import dwt.graphics.Transform; import dwt.graphics.LineAttributes; import dwt.internal.gtk.OS; import dwt.internal.cairo.Cairo; import dwt.internal.Converter; import dwt.internal.Compatibility; import tango.text.convert.Format; import tango.stdc.string; import tango.stdc.stringz; /** * Class <code>GC</code> is where all of the drawing capabilities that are * supported by DWT are located. Instances are used to draw on either an * <code>Image</code>, a <code>Control</code>, or directly on a <code>Display</code>. * <dl> * <dt><b>Styles:</b></dt> * <dd>LEFT_TO_RIGHT, RIGHT_TO_LEFT</dd> * </dl> * * <p> * The DWT drawing coordinate system is the two-dimensional space with the origin * (0,0) at the top left corner of the drawing area and with (x,y) values increasing * to the right and downward respectively. * </p> * * <p> * Application code must explicitly invoke the <code>GC.dispose()</code> * method to release the operating system resources managed by each instance * when those instances are no longer required. This is <em>particularly</em> * important on Windows95 and Windows98 where the operating system has a limited * number of device contexts available. * </p> * * <p> * Note: Only one of LEFT_TO_RIGHT and RIGHT_TO_LEFT may be specified. * </p> * * @see dwt.events.PaintEvent */ public final class GC : Resource { /** * the handle to the OS device context * (Warning: This field is platform dependent) * <p> * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT * public API. It is marked public only so that it can be shared * within the packages provided by DWT. It is not available on all * platforms and should never be accessed from application code. * </p> */ public GdkGC* handle; Drawable drawable; GCData data; const static int FOREGROUND = 1 << 0; const static int BACKGROUND = 1 << 1; const static int FONT = 1 << 2; const static int LINE_STYLE = 1 << 3; const static int LINE_CAP = 1 << 4; const static int LINE_JOIN = 1 << 5; const static int LINE_WIDTH = 1 << 6; const static int LINE_MITERLIMIT = 1 << 7; const static int BACKGROUND_BG = 1 << 8; const static int DRAW_OFFSET = 1 << 9; const static int DRAW = FOREGROUND | LINE_WIDTH | LINE_STYLE | LINE_CAP | LINE_JOIN | LINE_MITERLIMIT | DRAW_OFFSET; const static int FILL = BACKGROUND; static const float[] LINE_DOT = [1, 1]; static const float[] LINE_DASH = [3, 1]; static const float[] LINE_DASHDOT = [3, 1, 1, 1]; static const float[] LINE_DASHDOTDOT = [3, 1, 1, 1, 1, 1]; static const float[] LINE_DOT_ZERO = [3, 3]; static const float[] LINE_DASH_ZERO = [18, 6]; static const float[] LINE_DASHDOT_ZERO = [9, 6, 3, 6]; static const float[] LINE_DASHDOTDOT_ZERO = [9, 3, 3, 3, 3, 3]; this() { } /** * Constructs a new instance of this class which has been * configured to draw on the specified drawable. Sets the * foreground color, background color and font in the GC * to match those in the drawable. * <p> * You must dispose the graphics context when it is no longer required. * </p> * @param drawable the drawable to draw on * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the drawable is null</li> * <li>ERROR_NULL_ARGUMENT - if there is no current device</li> * <li>ERROR_INVALID_ARGUMENT * - if the drawable is an image that is not a bitmap or an icon * - if the drawable is an image or printer that is already selected * into another graphics context</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li> * <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li> * </ul> */ public this(Drawable drawable) { this(drawable, 0); } /** * Constructs a new instance of this class which has been * configured to draw on the specified drawable. Sets the * foreground color, background color and font in the GC * to match those in the drawable. * <p> * You must dispose the graphics context when it is no longer required. * </p> * * @param drawable the drawable to draw on * @param style the style of GC to construct * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the drawable is null</li> * <li>ERROR_NULL_ARGUMENT - if there is no current device</li> * <li>ERROR_INVALID_ARGUMENT * - if the drawable is an image that is not a bitmap or an icon * - if the drawable is an image or printer that is already selected * into another graphics context</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li> * <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li> * </ul> * * @since 2.1.2 */ public this(Drawable drawable, int style) { if (drawable is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); GCData data = new GCData(); data.style = checkStyle(style); auto gdkGC = drawable.internal_new_GC(data); Device device = data.device; if (device is null) device = Device.getDevice(); if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); this.device = data.device = device; init(drawable, data, gdkGC); if (device.tracking) device.new_Object(this); } static void addCairoString(cairo_t* cairo, char[] str, float x, float y, Font font) { char* buffer = toStringz( str ); if (OS.GTK_VERSION >= OS.buildVERSION(2, 8, 0)) { auto layout = OS.pango_cairo_create_layout(cairo); if (layout is null) DWT.error(DWT.ERROR_NO_HANDLES); OS.pango_layout_set_text(layout, buffer, -1); OS.pango_layout_set_font_description(layout, font.handle); Cairo.cairo_move_to(cairo, x, y); OS.pango_cairo_layout_path(cairo, layout); OS.g_object_unref(layout); } else { GC.setCairoFont(cairo, font); cairo_font_extents_t* extents = new cairo_font_extents_t(); Cairo.cairo_font_extents(cairo, extents); double baseline = y + extents.ascent; Cairo.cairo_move_to(cairo, x, baseline); Cairo.cairo_text_path(cairo, buffer); } } static int checkStyle (int style) { if ((style & DWT.LEFT_TO_RIGHT) !is 0) style &= ~DWT.RIGHT_TO_LEFT; return style & (DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT); } public static GC gtk_new(Drawable drawable, GCData data) { GC gc = new GC(); auto gdkGC = drawable.internal_new_GC(data); gc.device = data.device; gc.init(drawable, data, gdkGC); return gc; } void checkGC (int mask) { int state = data.state; if ((state & mask) is mask) return; state = (state ^ mask) & mask; data.state |= mask; auto cairo = data.cairo; if (cairo !is null) { if ((state & (BACKGROUND | FOREGROUND)) !is 0) { GdkColor* color; Pattern pattern; if ((state & FOREGROUND) !is 0) { color = data.foreground; pattern = data.foregroundPattern; data.state &= ~BACKGROUND; } else { color = data.background; pattern = data.backgroundPattern; data.state &= ~FOREGROUND; } if (pattern !is null) { Cairo.cairo_set_source(cairo, pattern.handle); } else { Cairo.cairo_set_source_rgba(cairo, (color.red & 0xFFFF) / cast(float)0xFFFF, (color.green & 0xFFFF) / cast(float)0xFFFF, (color.blue & 0xFFFF) / cast(float)0xFFFF, data.alpha / cast(float)0xFF); } } if ((state & FONT) !is 0) { if (data.layout !is null) { OS.pango_layout_set_font_description(data.layout, data.font); } if (OS.GTK_VERSION < OS.buildVERSION(2, 8, 0)) { setCairoFont(cairo, data.font); } } if ((state & LINE_CAP) !is 0) { int cap_style = 0; switch (data.lineCap) { case DWT.CAP_ROUND: cap_style = Cairo.CAIRO_LINE_CAP_ROUND; break; case DWT.CAP_FLAT: cap_style = Cairo.CAIRO_LINE_CAP_BUTT; break; case DWT.CAP_SQUARE: cap_style = Cairo.CAIRO_LINE_CAP_SQUARE; break; default: } Cairo.cairo_set_line_cap(cairo, cap_style); } if ((state & LINE_JOIN) !is 0) { int join_style = 0; switch (data.lineJoin) { case DWT.JOIN_MITER: join_style = Cairo.CAIRO_LINE_JOIN_MITER; break; case DWT.JOIN_ROUND: join_style = Cairo.CAIRO_LINE_JOIN_ROUND; break; case DWT.JOIN_BEVEL: join_style = Cairo.CAIRO_LINE_JOIN_BEVEL; break; default: } Cairo.cairo_set_line_join(cairo, join_style); } if ((state & LINE_WIDTH) !is 0) { Cairo.cairo_set_line_width(cairo, data.lineWidth is 0 ? 1 : data.lineWidth); switch (data.lineStyle) { case DWT.LINE_DOT: case DWT.LINE_DASH: case DWT.LINE_DASHDOT: case DWT.LINE_DASHDOTDOT: state |= LINE_STYLE; default: } } if ((state & LINE_STYLE) !is 0) { float dashesOffset = 0; float[] dashes = null; float width = data.lineWidth; switch (data.lineStyle) { case DWT.LINE_SOLID: break; case DWT.LINE_DASH: dashes = width !is 0 ? LINE_DASH : LINE_DASH_ZERO; break; case DWT.LINE_DOT: dashes = width !is 0 ? LINE_DOT : LINE_DOT_ZERO; break; case DWT.LINE_DASHDOT: dashes = width !is 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break; case DWT.LINE_DASHDOTDOT: dashes = width !is 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break; case DWT.LINE_CUSTOM: dashes = data.lineDashes; break; default: } if (dashes !is null) { dashesOffset = data.lineDashesOffset; double[] cairoDashes = new double[dashes.length]; for (int i = 0; i < cairoDashes.length; i++) { cairoDashes[i] = width is 0 || data.lineStyle is DWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width; } Cairo.cairo_set_dash(cairo, cairoDashes.ptr, cairoDashes.length, dashesOffset); } else { Cairo.cairo_set_dash(cairo, null, 0, 0); } } if ((state & LINE_MITERLIMIT) !is 0) { Cairo.cairo_set_miter_limit(cairo, data.lineMiterLimit); } if ((state & DRAW_OFFSET) !is 0) { data.cairoXoffset = data.cairoYoffset = 0; double[] matrix = new double[6]; Cairo.cairo_get_matrix(cairo,cast(cairo_matrix_t*) matrix.ptr); double scaling = matrix[0]; if (scaling < 0) scaling = -scaling; double strokeWidth = data.lineWidth * scaling; if (strokeWidth is 0 || (cast(int)strokeWidth % 2) is 1) { data.cairoXoffset = 0.5 / scaling; } scaling = matrix[3]; if (scaling < 0) scaling = -scaling; strokeWidth = data.lineWidth * scaling; if (strokeWidth is 0 || (cast(int)strokeWidth % 2) is 1) { data.cairoYoffset = 0.5 / scaling; } } return; } if ((state & (BACKGROUND | FOREGROUND)) !is 0) { GdkColor* foreground; if ((state & FOREGROUND) !is 0) { foreground = data.foreground; data.state &= ~BACKGROUND; } else { foreground = data.background; data.state &= ~FOREGROUND; } OS.gdk_gc_set_foreground(handle, foreground); } if ((state & BACKGROUND_BG) !is 0) { GdkColor* background = data.background; OS.gdk_gc_set_background(handle, background); } if ((state & FONT) !is 0) { if (data.layout !is null) { OS.pango_layout_set_font_description(data.layout, data.font); } } if ((state & (LINE_CAP | LINE_JOIN | LINE_STYLE | LINE_WIDTH)) !is 0) { int cap_style = 0; int join_style = 0; int width = cast(int)data.lineWidth; int line_style = 0; float[] dashes = null; switch (data.lineCap) { case DWT.CAP_ROUND: cap_style = OS.GDK_CAP_ROUND; break; case DWT.CAP_FLAT: cap_style = OS.GDK_CAP_BUTT; break; case DWT.CAP_SQUARE: cap_style = OS.GDK_CAP_PROJECTING; break; default: } switch (data.lineJoin) { case DWT.JOIN_ROUND: join_style = OS.GDK_JOIN_ROUND; break; case DWT.JOIN_MITER: join_style = OS.GDK_JOIN_MITER; break; case DWT.JOIN_BEVEL: join_style = OS.GDK_JOIN_BEVEL; break; default: } switch (data.lineStyle) { case DWT.LINE_SOLID: break; case DWT.LINE_DASH: dashes = width !is 0 ? LINE_DASH : LINE_DASH_ZERO; break; case DWT.LINE_DOT: dashes = width !is 0 ? LINE_DOT : LINE_DOT_ZERO; break; case DWT.LINE_DASHDOT: dashes = width !is 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break; case DWT.LINE_DASHDOTDOT: dashes = width !is 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break; case DWT.LINE_CUSTOM: dashes = data.lineDashes; break; default: } if (dashes !is null) { if ((state & LINE_STYLE) !is 0) { char[] dash_list = new char[dashes.length]; for (int i = 0; i < dash_list.length; i++) { dash_list[i] = cast(char)(width is 0 || data.lineStyle is DWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width); } OS.gdk_gc_set_dashes(handle, 0, dash_list.ptr, dash_list.length); } line_style = OS.GDK_LINE_ON_OFF_DASH; } else { line_style = OS.GDK_LINE_SOLID; } OS.gdk_gc_set_line_attributes(handle, width, line_style, cap_style, join_style); } } GdkRegion* convertRgn(GdkRegion* rgn, double[] matrix) { auto newRgn = OS.gdk_region_new(); int nRects; GdkRectangle* rects; OS.gdk_region_get_rectangles(rgn, &rects, &nRects); GdkRectangle* rect = new GdkRectangle(); int[] pointArray = new int[8]; double x, y; for (int i=0; i<nRects; i++) { *rect = rects[i]; x = rect.x; y = rect.y; Cairo.cairo_matrix_transform_point(cast(cairo_matrix_t*)matrix.ptr, &x, &y); pointArray[0] = cast(int)x; pointArray[1] = cast(int)y; x = rect.x + rect.width; y = rect.y; Cairo.cairo_matrix_transform_point(cast(cairo_matrix_t*)matrix.ptr, &x, &y); pointArray[2] = cast(int)Math.round(x); pointArray[3] = cast(int)y; x = rect.x + rect.width; y = rect.y + rect.height; Cairo.cairo_matrix_transform_point(cast(cairo_matrix_t*)matrix.ptr, &x, &y); pointArray[4] = cast(int)Math.round(x); pointArray[5] = cast(int)Math.round(y); x = rect.x; y = rect.y + rect.height; Cairo.cairo_matrix_transform_point(cast(cairo_matrix_t*)matrix.ptr, &x, &y); pointArray[6] = cast(int)x; pointArray[7] = cast(int)Math.round(y); auto polyRgn = OS.gdk_region_polygon(cast(GdkPoint*)pointArray.ptr, pointArray.length / 2, OS.GDK_EVEN_ODD_RULE); OS.gdk_region_union(newRgn, polyRgn); OS.gdk_region_destroy(polyRgn); } if (rects !is null) OS.g_free(rects); return newRgn; } /** * Copies a rectangular area of the receiver at the specified * position into the image, which must be of type <code>DWT.BITMAP</code>. * * @param image the image to copy into * @param x the x coordinate in the receiver of the area to be copied * @param y the y coordinate in the receiver of the area to be copied * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the image is null</li> * <li>ERROR_INVALID_ARGUMENT - if the image is not a bitmap or has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void copyArea(Image image, int x, int y) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (image is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (image.type !is DWT.BITMAP || image.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); Rectangle rect = image.getBounds(); auto gdkGC = OS.gdk_gc_new(image.pixmap); if (gdkGC is null) DWT.error(DWT.ERROR_NO_HANDLES); OS.gdk_gc_set_subwindow(gdkGC, OS.GDK_INCLUDE_INFERIORS); OS.gdk_draw_drawable(image.pixmap, gdkGC, data.drawable, x, y, 0, 0, rect.width, rect.height); OS.g_object_unref(gdkGC); } /** * Copies a rectangular area of the receiver at the source * position onto the receiver at the destination position. * * @param srcX the x coordinate in the receiver of the area to be copied * @param srcY the y coordinate in the receiver of the area to be copied * @param width the width of the area to copy * @param height the height of the area to copy * @param destX the x coordinate in the receiver of the area to copy to * @param destY the y coordinate in the receiver of the area to copy to * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void copyArea(int srcX, int srcY, int width, int height, int destX, int destY) { copyArea(srcX, srcY, width, height, destX, destY, true); } /** * Copies a rectangular area of the receiver at the source * position onto the receiver at the destination position. * * @param srcX the x coordinate in the receiver of the area to be copied * @param srcY the y coordinate in the receiver of the area to be copied * @param width the width of the area to copy * @param height the height of the area to copy * @param destX the x coordinate in the receiver of the area to copy to * @param destY the y coordinate in the receiver of the area to copy to * @param paint if <code>true</code> paint events will be generated for old and obscured areas * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void copyArea(int srcX, int srcY, int width, int height, int destX, int destY, bool paint) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (width <= 0 || height <= 0) return; int deltaX = destX - srcX, deltaY = destY - srcY; if (deltaX is 0 && deltaY is 0) return; auto drawable = data.drawable; if (data.image is null && paint) OS.gdk_gc_set_exposures(handle, true); OS.gdk_draw_drawable(drawable, handle, drawable, srcX, srcY, destX, destY, width, height); if (data.image is null & paint) { OS.gdk_gc_set_exposures(handle, false); bool disjoint = (destX + width < srcX) || (srcX + width < destX) || (destY + height < srcY) || (srcY + height < destY); GdkRectangle* rect = new GdkRectangle (); if (disjoint) { rect.x = srcX; rect.y = srcY; rect.width = width; rect.height = height; OS.gdk_window_invalidate_rect (cast(GdkWindow*)drawable, rect, false); // OS.gdk_window_clear_area_e(drawable, srcX, srcY, width, height); } else { if (deltaX !is 0) { int newX = destX - deltaX; if (deltaX < 0) newX = destX + width; rect.x = newX; rect.y = srcY; rect.width = Math.abs(deltaX); rect.height = height; OS.gdk_window_invalidate_rect (cast(GdkWindow*)drawable, rect, false); // OS.gdk_window_clear_area_e(drawable, newX, srcY, Math.abs(deltaX), height); } if (deltaY !is 0) { int newY = destY - deltaY; if (deltaY < 0) newY = destY + height; rect.x = srcX; rect.y = newY; rect.width = width; rect.height = Math.abs(deltaY); OS.gdk_window_invalidate_rect (cast(GdkWindow*)drawable, rect, false); // OS.gdk_window_clear_area_e(drawable, srcX, newY, width, Math.abs(deltaY)); } } } } void createLayout() { auto context = OS.gdk_pango_context_get(); if (context is null) DWT.error(DWT.ERROR_NO_HANDLES); data.context = context; auto layout = OS.pango_layout_new(context); if (layout is null) DWT.error(DWT.ERROR_NO_HANDLES); data.layout = layout; OS.pango_context_set_language(context, OS.gtk_get_default_language()); OS.pango_context_set_base_dir(context, OS.PANGO_DIRECTION_LTR); OS.gdk_pango_context_set_colormap(context, OS.gdk_colormap_get_system()); if (OS.GTK_VERSION >= OS.buildVERSION(2, 4, 0)) { OS.pango_layout_set_auto_dir(layout, false); } } void disposeLayout() { data.str = null; if (data.context !is null) OS.g_object_unref(data.context); if (data.layout !is null) OS.g_object_unref(data.layout); data.layout = null; data.context = null; } /** * Disposes of the operating system resources associated with * the graphics context. Applications must dispose of all GCs * which they allocate. * * @exception DWTError <ul> * <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li> * </ul> */ public override void dispose() { if (handle is null) return; if (data.device.isDisposed()) return; if (data.disposeCairo) { auto cairo = data.cairo; if (cairo !is null) Cairo.cairo_destroy(cairo); data.cairo = null; } /* Free resources */ auto clipRgn = data.clipRgn; if (clipRgn !is null) OS.gdk_region_destroy(clipRgn); Image image = data.image; if (image !is null) { image.memGC = null; if (image.transparentPixel !is -1) image.createMask(); } disposeLayout(); /* Dispose the GC */ Device device = data.device; drawable.internal_dispose_GC(handle, data); data.drawable = null; data.clipRgn = null; drawable = null; handle = null; data.image = null; data.str = null; if (device.tracking) device.dispose_Object(this); data.device = null; data = null; } /** * Draws the outline of a circular or elliptical arc * within the specified rectangular area. * <p> * The resulting arc begins at <code>startAngle</code> and extends * for <code>arcAngle</code> degrees, using the current color. * Angles are interpreted such that 0 degrees is at the 3 o'clock * position. A positive value indicates a counter-clockwise rotation * while a negative value indicates a clockwise rotation. * </p><p> * The center of the arc is the center of the rectangle whose origin * is (<code>x</code>, <code>y</code>) and whose size is specified by the * <code>width</code> and <code>height</code> arguments. * </p><p> * The resulting arc covers an area <code>width + 1</code> pixels wide * by <code>height + 1</code> pixels tall. * </p> * * @param x the x coordinate of the upper-left corner of the arc to be drawn * @param y the y coordinate of the upper-left corner of the arc to be drawn * @param width the width of the arc to be drawn * @param height the height of the arc to be drawn * @param startAngle the beginning angle * @param arcAngle the angular extent of the arc, relative to the start angle * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } if (width is 0 || height is 0 || arcAngle is 0) return; auto cairo = data.cairo; if (cairo !is null) { double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; if (width is height) { if (arcAngle >= 0) { Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } else { Cairo.cairo_arc(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } } else { Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f); Cairo.cairo_scale(cairo, width / 2f, height / 2f); if (arcAngle >= 0) { Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } else { Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } Cairo.cairo_restore(cairo); } Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_arc(data.drawable, handle, 0, x, y, width, height, startAngle * 64, arcAngle * 64); } /** * Draws a rectangle, based on the specified arguments, which has * the appearance of the platform's <em>focus rectangle</em> if the * platform supports such a notion, and otherwise draws a simple * rectangle in the receiver's foreground color. * * @param x the x coordinate of the rectangle * @param y the y coordinate of the rectangle * @param width the width of the rectangle * @param height the height of the rectangle * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawRectangle(int, int, int, int) */ public void drawFocus(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); /* * Feature in GTK. The function gtk_widget_get_default_style() * can't be used here because gtk_paint_focus() uses GCs, which * are not valid in the default style. The fix is to use a style * from a widget. */ auto style = OS.gtk_widget_get_style(data.device.shellHandle); auto cairo = data.cairo; if (cairo !is null) { checkGC(FOREGROUND); int lineWidth; OS.gtk_widget_style_get1(data.device.shellHandle, OS.focus_line_width.ptr, &lineWidth ); Cairo.cairo_save(cairo); Cairo.cairo_set_line_width(cairo, lineWidth); double[] dashes = [1, 1]; double dash_offset = -lineWidth / 2f; while (dash_offset < 0) dash_offset += 2; Cairo.cairo_set_dash(cairo, dashes.ptr, dashes.length, dash_offset); Cairo.cairo_rectangle(cairo, x + lineWidth / 2f, y + lineWidth / 2f, width, height); Cairo.cairo_stroke(cairo); Cairo.cairo_restore(cairo); return; } char dummy; OS.gtk_paint_focus(style,cast(GdkWindow *) data.drawable, OS.GTK_STATE_NORMAL, null, data.device.shellHandle, &dummy, x, y, width, height); } /** * Draws the given image in the receiver at the specified * coordinates. * * @param image the image to draw * @param x the x coordinate of where to draw * @param y the y coordinate of where to draw * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the image is null</li> * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> * <li>ERROR_INVALID_ARGUMENT - if the given coordinates are outside the bounds of the image</li> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li> * </ul> */ public void drawImage(Image image, int x, int y) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (image is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (image.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); drawImage(image, 0, 0, -1, -1, x, y, -1, -1, true); } /** * Copies a rectangular area from the source image into a (potentially * different sized) rectangular area in the receiver. If the source * and destination areas are of differing sizes, then the source * area will be stretched or shrunk to fit the destination area * as it is copied. The copy fails if any part of the source rectangle * lies outside the bounds of the source image, or if any of the width * or height arguments are negative. * * @param image the source image * @param srcX the x coordinate in the source image to copy from * @param srcY the y coordinate in the source image to copy from * @param srcWidth the width in pixels to copy from the source * @param srcHeight the height in pixels to copy from the source * @param destX the x coordinate in the destination to copy to * @param destY the y coordinate in the destination to copy to * @param destWidth the width in pixels of the destination rectangle * @param destHeight the height in pixels of the destination rectangle * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the image is null</li> * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> * <li>ERROR_INVALID_ARGUMENT - if any of the width or height arguments are negative. * <li>ERROR_INVALID_ARGUMENT - if the source rectangle is not contained within the bounds of the source image</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li> * </ul> */ public void drawImage(Image image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (srcWidth is 0 || srcHeight is 0 || destWidth is 0 || destHeight is 0) return; if (srcX < 0 || srcY < 0 || srcWidth < 0 || srcHeight < 0 || destWidth < 0 || destHeight < 0) { DWT.error (DWT.ERROR_INVALID_ARGUMENT); } if (image is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (image.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); drawImage(image, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false); } void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, bool simple) { int width; int height; OS.gdk_drawable_get_size(srcImage.pixmap, &width, &height); int imgWidth = width; int imgHeight = height; if (simple) { srcWidth = destWidth = imgWidth; srcHeight = destHeight = imgHeight; } else { simple = srcX is 0 && srcY is 0 && srcWidth is destWidth && destWidth is imgWidth && srcHeight is destHeight && destHeight is imgHeight; if (srcX + srcWidth > imgWidth || srcY + srcHeight > imgHeight) { DWT.error(DWT.ERROR_INVALID_ARGUMENT); } } auto cairo = data.cairo; if (cairo !is null) { if (data.alpha !is 0) { srcImage.createSurface(); Cairo.cairo_save(cairo); Cairo.cairo_rectangle(cairo, destX , destY, destWidth, destHeight); Cairo.cairo_clip(cairo); Cairo.cairo_translate(cairo, destX - srcX, destY - srcY); if (srcWidth !is destWidth || srcHeight !is destHeight) { Cairo.cairo_scale(cairo, destWidth / cast(float)srcWidth, destHeight / cast(float)srcHeight); } int filter = Cairo.CAIRO_FILTER_GOOD; switch (data.interpolation) { case DWT.DEFAULT: filter = Cairo.CAIRO_FILTER_GOOD; break; case DWT.NONE: filter = Cairo.CAIRO_FILTER_NEAREST; break; case DWT.LOW: filter = Cairo.CAIRO_FILTER_FAST; break; case DWT.HIGH: filter = Cairo.CAIRO_FILTER_BEST; break; default: } auto pattern = Cairo.cairo_pattern_create_for_surface(srcImage.surface); if (pattern is null) DWT.error(DWT.ERROR_NO_HANDLES); if (srcWidth !is destWidth || srcHeight !is destHeight) { /* * Bug in Cairo. When drawing the image streched with an interpolation * alghorithm, the edges of the image are faded. This is not a bug, but * it is not desired. To avoid the faded edges, it should be possible to * use cairo_pattern_set_extend() to set the pattern extend to either * CAIRO_EXTEND_REFLECT or CAIRO_EXTEND_PAD, but these are not implemented * in some versions of cairo (1.2.x) and have bugs in others (in 1.4.2 it * draws with black edges). The fix is to implement CAIRO_EXTEND_REFLECT * by creating an image that is 3 times bigger than the original, drawing * the original image in every quadrant (with an appropriate transform) and * use this image as the pattern. * * NOTE: For some reaons, it is necessary to use CAIRO_EXTEND_PAD with * the image that was created or the edges are still faded. */ if (Cairo.cairo_version () >= Cairo.CAIRO_VERSION_ENCODE(1, 4, 0)) { auto surface = Cairo.cairo_image_surface_create(Cairo.CAIRO_FORMAT_ARGB32, imgWidth * 3, imgHeight * 3); auto cr = Cairo.cairo_create(surface); Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_scale(cr, -1, -1); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight * 3); Cairo.cairo_paint(cr); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight * 3); Cairo.cairo_paint(cr); Cairo.cairo_scale(cr, 1, -1); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_scale(cr, -1, -1); Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight); Cairo.cairo_paint(cr); Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight * 3); Cairo.cairo_paint(cr); Cairo.cairo_destroy(cr); auto newPattern = Cairo.cairo_pattern_create_for_surface(surface); Cairo.cairo_surface_destroy(surface); if (newPattern is null) DWT.error(DWT.ERROR_NO_HANDLES); Cairo.cairo_pattern_destroy(pattern); pattern = newPattern; Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_PAD); double[] matrix = new double[6]; Cairo.cairo_matrix_init_translate(cast(cairo_matrix_t*)matrix.ptr, imgWidth, imgHeight); Cairo.cairo_pattern_set_matrix(pattern, cast(cairo_matrix_t*)matrix.ptr); } // Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_REFLECT); } Cairo.cairo_pattern_set_filter(pattern, filter); Cairo.cairo_set_source(cairo, pattern); if (data.alpha !is 0xFF) { Cairo.cairo_paint_with_alpha(cairo, data.alpha / cast(float)0xFF); } else { Cairo.cairo_paint(cairo); } Cairo.cairo_restore(cairo); Cairo.cairo_pattern_destroy(pattern); } return; } if (srcImage.alpha !is -1 || srcImage.alphaData !is null) { drawImageAlpha(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); } else if (srcImage.transparentPixel !is -1 || srcImage.mask !is null) { drawImageMask(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); } else { drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); } } void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, bool simple, int imgWidth, int imgHeight) { if (srcWidth is destWidth && srcHeight is destHeight) { OS.gdk_draw_drawable(data.drawable, handle, srcImage.pixmap, srcX, srcY, destX, destY, destWidth, destHeight); } else { if (device.useXRender) { drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, null, -1); return; } auto pixbuf = scale(srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destWidth, destHeight); if (pixbuf !is null) { OS.gdk_pixbuf_render_to_drawable(pixbuf, data.drawable, handle, 0, 0, destX, destY, destWidth, destHeight, OS.GDK_RGB_DITHER_NORMAL, 0, 0); OS.g_object_unref(pixbuf); } } } void drawImageAlpha(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, bool simple, int imgWidth, int imgHeight) { if (srcImage.alpha is 0) return; if (srcImage.alpha is 255) { drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); return; } if (device.useXRender) { drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, srcImage.mask, OS.PictStandardA8); return; } auto pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, true, 8, srcWidth, srcHeight); if (pixbuf is null) return; auto colormap = OS.gdk_colormap_get_system(); OS.gdk_pixbuf_get_from_drawable(pixbuf, srcImage.pixmap, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); auto pixels = OS.gdk_pixbuf_get_pixels(pixbuf); byte[] line = new byte[stride]; byte alpha = cast(byte)srcImage.alpha; byte[] alphaData = srcImage.alphaData; for (int y=0; y<srcHeight; y++) { int alphaIndex = (y + srcY) * imgWidth + srcX; memmove(line.ptr, pixels + (y * stride), stride); for (int x=3; x<stride; x+=4) { line[x] = alphaData is null ? alpha : alphaData[alphaIndex++]; } memmove(pixels + (y * stride), line.ptr, stride); } if (srcWidth !is destWidth || srcHeight !is destHeight) { auto scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); OS.g_object_unref(pixbuf); if (scaledPixbuf is null) return; pixbuf = scaledPixbuf; } /* * Feature in GTK. gdk_draw_pixbuf was introduced in GTK+ 2.2.0 and * supports clipping. */ if (OS.GTK_VERSION >= OS.buildVERSION (2, 2, 0)) { OS.gdk_draw_pixbuf(data.drawable, handle, pixbuf, 0, 0, destX, destY, destWidth, destHeight, OS.GDK_RGB_DITHER_NORMAL, 0, 0); } else { OS.gdk_pixbuf_render_to_drawable_alpha(pixbuf, data.drawable, 0, 0, destX, destY, destWidth, destHeight, OS.GDK_PIXBUF_ALPHA_BILEVEL, 128, OS.GDK_RGB_DITHER_NORMAL, 0, 0); } OS.g_object_unref(pixbuf); } void drawImageMask(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, bool simple, int imgWidth, int imgHeight) { auto drawable = data.drawable; auto colorPixmap = srcImage.pixmap; /* Generate the mask if necessary. */ if (srcImage.transparentPixel !is -1) srcImage.createMask(); auto maskPixmap = srcImage.mask; if (device.useXRender) { drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, maskPixmap, OS.PictStandardA1); } else { if (srcWidth !is destWidth || srcHeight !is destHeight) { auto pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, true, 8, srcWidth, srcHeight); if (pixbuf !is null) { auto colormap = OS.gdk_colormap_get_system(); OS.gdk_pixbuf_get_from_drawable(pixbuf, colorPixmap, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); auto maskPixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, srcWidth, srcHeight); if (maskPixbuf !is null) { OS.gdk_pixbuf_get_from_drawable(maskPixbuf, maskPixmap, null, srcX, srcY, 0, 0, srcWidth, srcHeight); int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); auto pixels = OS.gdk_pixbuf_get_pixels(pixbuf); byte[] line = new byte[stride]; int maskStride = OS.gdk_pixbuf_get_rowstride(maskPixbuf); auto maskPixels = OS.gdk_pixbuf_get_pixels(maskPixbuf); byte[] maskLine = new byte[maskStride]; for (int y=0; y<srcHeight; y++) { auto offset = pixels + (y * stride); memmove(line.ptr, offset, stride); auto maskOffset = maskPixels + (y * maskStride); memmove(maskLine.ptr, maskOffset, maskStride); for (int x=0; x<srcWidth; x++) { if (maskLine[x * 3] is 0) { line[x*4+3] = 0; } } memmove(offset, line.ptr, stride); } OS.g_object_unref(maskPixbuf); auto scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); if (scaledPixbuf !is null) { GdkPixmap * colorBuffer; GdkBitmap * maskBuffer; OS.gdk_pixbuf_render_pixmap_and_mask(scaledPixbuf, &colorBuffer, &maskBuffer, 128); colorPixmap = cast(GdkDrawable *)colorBuffer; maskPixmap = cast(GdkDrawable *)maskBuffer; OS.g_object_unref(scaledPixbuf); } } OS.g_object_unref(pixbuf); } srcX = 0; srcY = 0; srcWidth = destWidth; srcHeight = destHeight; } /* Merge clipping with mask if necessary */ if (data.clipRgn !is null) { int newWidth = srcX + srcWidth; int newHeight = srcY + srcHeight; int bytesPerLine = (newWidth + 7) / 8; char[] maskData = new char[bytesPerLine * newHeight]; auto mask = cast(GdkDrawable *) OS.gdk_bitmap_create_from_data(null, maskData.ptr, newWidth, newHeight); if (mask !is null) { auto gc = OS.gdk_gc_new(mask); OS.gdk_region_offset(data.clipRgn, -destX + srcX, -destY + srcY); OS.gdk_gc_set_clip_region(gc, data.clipRgn); OS.gdk_region_offset(data.clipRgn, destX - srcX, destY - srcY); GdkColor* color = new GdkColor(); color.pixel = 1; OS.gdk_gc_set_foreground(gc, color); OS.gdk_draw_rectangle(mask, gc, 1, 0, 0, newWidth, newHeight); OS.gdk_gc_set_function(gc, OS.GDK_AND); OS.gdk_draw_drawable(mask, gc, maskPixmap, 0, 0, 0, 0, newWidth, newHeight); OS.g_object_unref(gc); if (maskPixmap !is null && srcImage.mask !is maskPixmap) OS.g_object_unref(maskPixmap); maskPixmap = mask; } } /* Blit cliping the mask */ GdkGCValues* values = new GdkGCValues(); OS.gdk_gc_get_values(handle, values); OS.gdk_gc_set_clip_mask(handle, cast(GdkBitmap *)maskPixmap); OS.gdk_gc_set_clip_origin(handle, destX - srcX, destY - srcY); OS.gdk_draw_drawable(drawable, handle, colorPixmap, srcX, srcY, destX, destY, srcWidth, srcHeight); OS.gdk_gc_set_values(handle, values, OS.GDK_GC_CLIP_MASK | OS.GDK_GC_CLIP_X_ORIGIN | OS.GDK_GC_CLIP_Y_ORIGIN); if (data.clipRgn !is null) OS.gdk_gc_set_clip_region(handle, data.clipRgn); } /* Destroy scaled pixmaps */ if (colorPixmap !is null && srcImage.pixmap !is colorPixmap) OS.g_object_unref(colorPixmap); if (maskPixmap !is null && srcImage.mask !is maskPixmap) OS.g_object_unref(maskPixmap); /* Destroy the image mask if the there is a GC created on the image */ if (srcImage.transparentPixel !is -1 && srcImage.memGC !is null) srcImage.destroyMask(); } void drawImageXRender(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, bool simple, int imgWidth, int imgHeight, GdkDrawable* maskPixmap, int maskType) { int translateX = 0, translateY = 0; auto drawable = data.drawable; if (data.image is null) { int x, y; GdkDrawable* real_drawable; OS.gdk_window_get_internal_paint_info(cast(GdkWindow*)drawable, &real_drawable, &x, &y); drawable = real_drawable; translateX = -x; translateY = -y; } auto xDisplay = OS.GDK_DISPLAY(); int maskPict = 0; if (maskPixmap !is null) { int attribCount = 0; XRenderPictureAttributes* attrib; if (srcImage.alpha !is -1) { attribCount = 1; attrib = new XRenderPictureAttributes(); attrib.repeat = true; } maskPict = OS.XRenderCreatePicture(cast(void*)xDisplay, OS.gdk_x11_drawable_get_xid(maskPixmap), OS.XRenderFindStandardFormat(cast(void*)xDisplay, maskType), attribCount, attrib); if (maskPict is 0) DWT.error(DWT.ERROR_NO_HANDLES); } auto format = OS.XRenderFindVisualFormat(cast(void*)xDisplay, OS.gdk_x11_visual_get_xvisual(OS.gdk_visual_get_system())); auto destPict = OS.XRenderCreatePicture(cast(void*)xDisplay, OS.gdk_x11_drawable_get_xid(drawable), format, 0, null); if (destPict is 0) DWT.error(DWT.ERROR_NO_HANDLES); int srcPict = OS.XRenderCreatePicture(xDisplay, OS.gdk_x11_drawable_get_xid(srcImage.pixmap), format, 0, null); if (srcPict is 0) DWT.error(DWT.ERROR_NO_HANDLES); if (srcWidth !is destWidth || srcHeight !is destHeight) { int[] transform = [cast(int)((cast(float)srcWidth / destWidth) * 65536), 0, 0, 0, cast(int)((cast(float)srcHeight / destHeight) * 65536), 0, 0, 0, 65536]; OS.XRenderSetPictureTransform(xDisplay, srcPict, cast(XTransform*)transform.ptr); if (maskPict !is 0) OS.XRenderSetPictureTransform(xDisplay, maskPict, cast(XTransform*)transform.ptr); srcX *= destWidth / cast(float)srcWidth; srcY *= destHeight / cast(float)srcHeight; } auto clipping = data.clipRgn; if (data.damageRgn !is null) { if (clipping is null) { clipping = data.damageRgn; } else { clipping = OS.gdk_region_new(); OS.gdk_region_union(clipping, data.clipRgn); OS.gdk_region_intersect(clipping, data.damageRgn); } } if (clipping !is null) { int nRects; GdkRectangle* rects; OS.gdk_region_get_rectangles(clipping, &rects, &nRects); GdkRectangle* rect = new GdkRectangle(); short[] xRects = new short[nRects * 4]; for (int i=0, j=0; i<nRects; i++, j+=4) { *rect = rects[i]; xRects[j] = cast(short)rect.x; xRects[j+1] = cast(short)rect.y; xRects[j+2] = cast(short)rect.width; xRects[j+3] = cast(short)rect.height; } OS.XRenderSetPictureClipRectangles(xDisplay, destPict, translateX, translateY,cast(XRectangle*) xRects.ptr, nRects); if (clipping !is data.clipRgn && clipping !is data.damageRgn) { OS.gdk_region_destroy(clipping); } if (rects !is null) OS.g_free(rects); } OS.XRenderComposite(xDisplay, maskPict !is 0 ? OS.PictOpOver : OS.PictOpSrc, srcPict, maskPict, destPict, srcX, srcY, srcX, srcY, destX + translateX, destY + translateY, destWidth, destHeight); OS.XRenderFreePicture(xDisplay, destPict); OS.XRenderFreePicture(xDisplay, srcPict); if (maskPict !is 0) OS.XRenderFreePicture(xDisplay, maskPict); } GdkPixbuf* scale(GdkDrawable* src, int srcX, int srcY, int srcWidth, int srcHeight, int destWidth, int destHeight) { auto pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, srcWidth, srcHeight); if (pixbuf is null) return null; auto colormap = OS.gdk_colormap_get_system(); OS.gdk_pixbuf_get_from_drawable(pixbuf, src, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); auto scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); OS.g_object_unref(pixbuf); return scaledPixbuf; } /** * Draws a line, using the foreground color, between the points * (<code>x1</code>, <code>y1</code>) and (<code>x2</code>, <code>y2</code>). * * @param x1 the first point's x coordinate * @param y1 the first point's y coordinate * @param x2 the second point's x coordinate * @param y2 the second point's y coordinate * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawLine(int x1, int y1, int x2, int y2) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); auto cairo = data.cairo; if (cairo !is null) { double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; Cairo.cairo_move_to(cairo, x1 + xOffset, y1 + yOffset); Cairo.cairo_line_to(cairo, x2 + xOffset, y2 + yOffset); Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_line (data.drawable, handle, x1, y1, x2, y2); } /** * Draws the outline of an oval, using the foreground color, * within the specified rectangular area. * <p> * The result is a circle or ellipse that fits within the * rectangle specified by the <code>x</code>, <code>y</code>, * <code>width</code>, and <code>height</code> arguments. * </p><p> * The oval covers an area that is <code>width + 1</code> * pixels wide and <code>height + 1</code> pixels tall. * </p> * * @param x the x coordinate of the upper left corner of the oval to be drawn * @param y the y coordinate of the upper left corner of the oval to be drawn * @param width the width of the oval to be drawn * @param height the height of the oval to be drawn * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawOval(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } auto cairo = data.cairo; if (cairo !is null) { double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; if (width is height) { Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, 0, -2 * cast(float)Compatibility.PI); } else { Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f); Cairo.cairo_scale(cairo, width / 2f, height / 2f); Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, -2 * cast(float)Compatibility.PI); Cairo.cairo_restore(cairo); } Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_arc(data.drawable, handle, 0, x, y, width, height, 0, 23040); } /** * Draws the path described by the parameter. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param path the path to draw * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Path * * @since 3.1 */ public void drawPath(Path path) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (path.handle is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT); initCairo(); checkGC(DRAW); auto cairo = data.cairo; Cairo.cairo_save(cairo); double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; Cairo.cairo_translate(cairo, xOffset, yOffset); auto copy = Cairo.cairo_copy_path(path.handle); if (copy is null) DWT.error(DWT.ERROR_NO_HANDLES); Cairo.cairo_append_path(cairo, copy); Cairo.cairo_path_destroy(copy); Cairo.cairo_stroke(cairo); Cairo.cairo_restore(cairo); } /** * Draws a pixel, using the foreground color, at the specified * point (<code>x</code>, <code>y</code>). * <p> * Note that the receiver's line attributes do not affect this * operation. * </p> * * @param x the point's x coordinate * @param y the point's y coordinate * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void drawPoint (int x, int y) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); auto cairo = data.cairo; if (cairo !is null) { Cairo.cairo_rectangle(cairo, x, y, 1, 1); Cairo.cairo_fill(cairo); return; } OS.gdk_draw_point(data.drawable, handle, x, y); } /** * Draws the closed polygon which is defined by the specified array * of integer coordinates, using the receiver's foreground color. The array * contains alternating x and y values which are considered to represent * points which are the vertices of the polygon. Lines are drawn between * each consecutive pair, and between the first pair and last pair in the * array. * * @param pointArray an array of alternating x and y values which are the vertices of the polygon * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT if pointArray is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawPolygon(int[] pointArray) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); checkGC(DRAW); auto cairo = data.cairo; if (cairo !is null) { drawPolyline(cairo, pointArray, true); Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_polygon(data.drawable, handle, 0, cast(GdkPoint*)pointArray.ptr, pointArray.length / 2); } /** * Draws the polyline which is defined by the specified array * of integer coordinates, using the receiver's foreground color. The array * contains alternating x and y values which are considered to represent * points which are the corners of the polyline. Lines are drawn between * each consecutive pair, but not between the first pair and last pair in * the array. * * @param pointArray an array of alternating x and y values which are the corners of the polyline * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the point array is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawPolyline(int[] pointArray) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); checkGC(DRAW); auto cairo = data.cairo; if (cairo !is null) { drawPolyline(cairo, pointArray, false); Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_lines(data.drawable, handle, cast(GdkPoint*)pointArray.ptr, pointArray.length / 2); } void drawPolyline(cairo_t* cairo, int[] pointArray, bool close) { int count = pointArray.length / 2; if (count is 0) return; double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; Cairo.cairo_move_to(cairo, pointArray[0] + xOffset, pointArray[1] + yOffset); for (int i = 1, j=2; i < count; i++, j += 2) { Cairo.cairo_line_to(cairo, pointArray[j] + xOffset, pointArray[j + 1] + yOffset); } if (close) Cairo.cairo_close_path(cairo); } /** * Draws the outline of the rectangle specified by the arguments, * using the receiver's foreground color. The left and right edges * of the rectangle are at <code>x</code> and <code>x + width</code>. * The top and bottom edges are at <code>y</code> and <code>y + height</code>. * * @param x the x coordinate of the rectangle to be drawn * @param y the y coordinate of the rectangle to be drawn * @param width the width of the rectangle to be drawn * @param height the height of the rectangle to be drawn * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawRectangle(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } auto cairo = data.cairo; if (cairo !is null) { double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; Cairo.cairo_rectangle(cairo, x + xOffset, y + yOffset, width, height); Cairo.cairo_stroke(cairo); return; } OS.gdk_draw_rectangle(data.drawable, handle, 0, x, y, width, height); } /** * Draws the outline of the specified rectangle, using the receiver's * foreground color. The left and right edges of the rectangle are at * <code>rect.x</code> and <code>rect.x + rect.width</code>. The top * and bottom edges are at <code>rect.y</code> and * <code>rect.y + rect.height</code>. * * @param rect the rectangle to draw * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawRectangle(Rectangle rect) { if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); drawRectangle (rect.x, rect.y, rect.width, rect.height); } /** * Draws the outline of the round-cornered rectangle specified by * the arguments, using the receiver's foreground color. The left and * right edges of the rectangle are at <code>x</code> and <code>x + width</code>. * The top and bottom edges are at <code>y</code> and <code>y + height</code>. * The <em>roundness</em> of the corners is specified by the * <code>arcWidth</code> and <code>arcHeight</code> arguments, which * are respectively the width and height of the ellipse used to draw * the corners. * * @param x the x coordinate of the rectangle to be drawn * @param y the y coordinate of the rectangle to be drawn * @param width the width of the rectangle to be drawn * @param height the height of the rectangle to be drawn * @param arcWidth the width of the arc * @param arcHeight the height of the arc * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(DRAW); int nx = x; int ny = y; int nw = width; int nh = height; int naw = arcWidth; int nah = arcHeight; if (nw < 0) { nw = 0 - nw; nx = nx - nw; } if (nh < 0) { nh = 0 - nh; ny = ny -nh; } if (naw < 0) naw = 0 - naw; if (nah < 0) nah = 0 - nah; auto cairo = data.cairo; if (cairo !is null) { float naw2 = naw / 2f; float nah2 = nah / 2f; float fw = nw / naw2; float fh = nh / nah2; Cairo.cairo_save(cairo); double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset; Cairo.cairo_translate(cairo, nx + xOffset, ny + yOffset); Cairo.cairo_scale(cairo, naw2, nah2); Cairo.cairo_move_to(cairo, fw - 1, 0); Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0); Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0); Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI); Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0); Cairo.cairo_close_path(cairo); Cairo.cairo_restore(cairo); Cairo.cairo_stroke(cairo); return; } int naw2 = naw / 2; int nah2 = nah / 2; auto drawable = data.drawable; if (nw > naw) { if (nh > nah) { OS.gdk_draw_arc(drawable, handle, 0, nx, ny, naw, nah, 5760, 5760); OS.gdk_draw_line(drawable, handle, nx + naw2, ny, nx + nw - naw2, ny); OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny, naw, nah, 0, 5760); OS.gdk_draw_line(drawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2); OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760); OS.gdk_draw_line(drawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh); OS.gdk_draw_arc(drawable, handle, 0, nx, ny + nh - nah, naw, nah, 11520, 5760); OS.gdk_draw_line(drawable, handle, nx, ny + nah2, nx, ny + nh - nah2); } else { OS.gdk_draw_arc(drawable, handle, 0, nx, ny, naw, nh, 5760, 11520); OS.gdk_draw_line(drawable, handle, nx + naw2, ny, nx + nw - naw2, ny); OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny, naw, nh, 17280, 11520); OS.gdk_draw_line(drawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh); } } else { if (nh > nah) { OS.gdk_draw_arc(drawable, handle, 0, nx, ny, nw, nah, 0, 11520); OS.gdk_draw_line(drawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2); OS.gdk_draw_arc(drawable, handle, 0, nx, ny + nh - nah, nw, nah, 11520, 11520); OS.gdk_draw_line(drawable,handle, nx, ny + nah2, nx, ny + nh - nah2); } else { OS.gdk_draw_arc(drawable, handle, 0, nx, ny, nw, nh, 0, 23040); } } } /** * Draws the given str, using the receiver's current font and * foreground color. No tab expansion or carriage return processing * will be performed. The background of the rectangular area where * the str is being drawn will be filled with the receiver's * background color. * * @param str the str to be drawn * @param x the x coordinate of the top left corner of the rectangular area where the str is to be drawn * @param y the y coordinate of the top left corner of the rectangular area where the str is to be drawn * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawString (char[] str, int x, int y) { drawString(str, x, y, false); } /** * Draws the given str, using the receiver's current font and * foreground color. No tab expansion or carriage return processing * will be performed. If <code>isTransparent</code> is <code>true</code>, * then the background of the rectangular area where the str is being * drawn will not be modified, otherwise it will be filled with the * receiver's background color. * * @param str the str to be drawn * @param x the x coordinate of the top left corner of the rectangular area where the str is to be drawn * @param y the y coordinate of the top left corner of the rectangular area where the str is to be drawn * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawString(char[] str, int x, int y, bool isTransparent) { drawText(str, x, y, isTransparent ? DWT.DRAW_TRANSPARENT : 0); } /** * Draws the given str, using the receiver's current font and * foreground color. Tab expansion and carriage return processing * are performed. The background of the rectangular area where * the text is being drawn will be filled with the receiver's * background color. * * @param str the str to be drawn * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawText(char[] str, int x, int y) { drawText(str, x, y, DWT.DRAW_DELIMITER | DWT.DRAW_TAB); } /** * Draws the given str, using the receiver's current font and * foreground color. Tab expansion and carriage return processing * are performed. If <code>isTransparent</code> is <code>true</code>, * then the background of the rectangular area where the text is being * drawn will not be modified, otherwise it will be filled with the * receiver's background color. * * @param str the str to be drawn * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawText(char[] str, int x, int y, bool isTransparent) { int flags = DWT.DRAW_DELIMITER | DWT.DRAW_TAB; if (isTransparent) flags |= DWT.DRAW_TRANSPARENT; drawText(str, x, y, flags); } /** * Draws the given str, using the receiver's current font and * foreground color. Tab expansion, line delimiter and mnemonic * processing are performed according to the specified flags. If * <code>flags</code> includes <code>DRAW_TRANSPARENT</code>, * then the background of the rectangular area where the text is being * drawn will not be modified, otherwise it will be filled with the * receiver's background color. * <p> * The parameter <code>flags</code> may be a combination of: * <dl> * <dt><b>DRAW_DELIMITER</b></dt> * <dd>draw multiple lines</dd> * <dt><b>DRAW_TAB</b></dt> * <dd>expand tabs</dd> * <dt><b>DRAW_MNEMONIC</b></dt> * <dd>underline the mnemonic character</dd> * <dt><b>DRAW_TRANSPARENT</b></dt> * <dd>transparent background</dd> * </dl> * </p> * * @param str the str to be drawn * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn * @param flags the flags specifying how to process the text * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void drawText (char[] str, int x, int y, int flags) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (str is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (str.length is 0) return; auto cairo = data.cairo; if (cairo !is null) { if (OS.GTK_VERSION < OS.buildVERSION(2, 8, 0)) { //TODO - honor flags checkGC(FOREGROUND | FONT); cairo_font_extents_t* extents = new cairo_font_extents_t(); Cairo.cairo_font_extents(cairo, extents); double baseline = y + extents.ascent; Cairo.cairo_move_to(cairo, x, baseline); char* buffer = toStringz( str ); Cairo.cairo_show_text(cairo, buffer); Cairo.cairo_new_path(cairo); return; } } setString(str, flags); if (cairo !is null) { if ((flags & DWT.DRAW_TRANSPARENT) is 0) { checkGC(BACKGROUND); int width, height; OS.pango_layout_get_size(data.layout, &width, &height); Cairo.cairo_rectangle(cairo, x, y, OS.PANGO_PIXELS(width), OS.PANGO_PIXELS(height)); Cairo.cairo_fill(cairo); } checkGC(FOREGROUND | FONT); Cairo.cairo_move_to(cairo, x, y); OS.pango_cairo_show_layout(cairo, data.layout); return; } checkGC(FOREGROUND | FONT | BACKGROUND_BG); GdkColor* background = null; if ((flags & DWT.DRAW_TRANSPARENT) is 0) background = data.background; if (!data.xorMode) { OS.gdk_draw_layout_with_colors(data.drawable, handle, x, y, data.layout, null, background); } else { auto layout = data.layout; int w, h; OS.pango_layout_get_size(layout, &w, &h); int width = OS.PANGO_PIXELS(w); int height = OS.PANGO_PIXELS(h); auto pixmap = OS.gdk_pixmap_new(cast(GdkDrawable*)OS.GDK_ROOT_PARENT(), width, height, -1); if (pixmap is null) DWT.error(DWT.ERROR_NO_HANDLES); auto gdkGC = OS.gdk_gc_new(cast(GdkDrawable*)pixmap); if (gdkGC is null) DWT.error(DWT.ERROR_NO_HANDLES); GdkColor* black = new GdkColor(); OS.gdk_gc_set_foreground(gdkGC, black); OS.gdk_draw_rectangle(cast(GdkDrawable*)pixmap, gdkGC, 1, 0, 0, width, height); OS.gdk_gc_set_foreground(gdkGC, data.foreground); OS.gdk_draw_layout_with_colors(cast(GdkDrawable*)pixmap, gdkGC, 0, 0, layout, null, background); OS.g_object_unref(gdkGC); OS.gdk_draw_drawable(data.drawable, handle, cast(GdkDrawable*)pixmap, 0, 0, x, y, width, height); OS.g_object_unref(pixmap); } } /** * Compares the argument to the receiver, and returns true * if they represent the <em>same</em> object using a class * specific comparison. * * @param object the object to compare with this object * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise * * @see #hashCode */ public override int opEquals(Object object) { if (object is this) return true; if ( auto gc = cast(GC)object){ return handle is gc.handle; } return false; } /** * Fills the interior of a circular or elliptical arc within * the specified rectangular area, with the receiver's background * color. * <p> * The resulting arc begins at <code>startAngle</code> and extends * for <code>arcAngle</code> degrees, using the current color. * Angles are interpreted such that 0 degrees is at the 3 o'clock * position. A positive value indicates a counter-clockwise rotation * while a negative value indicates a clockwise rotation. * </p><p> * The center of the arc is the center of the rectangle whose origin * is (<code>x</code>, <code>y</code>) and whose size is specified by the * <code>width</code> and <code>height</code> arguments. * </p><p> * The resulting arc covers an area <code>width + 1</code> pixels wide * by <code>height + 1</code> pixels tall. * </p> * * @param x the x coordinate of the upper-left corner of the arc to be filled * @param y the y coordinate of the upper-left corner of the arc to be filled * @param width the width of the arc to be filled * @param height the height of the arc to be filled * @param startAngle the beginning angle * @param arcAngle the angular extent of the arc, relative to the start angle * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawArc */ public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(FILL); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } if (width is 0 || height is 0 || arcAngle is 0) return; auto cairo = data.cairo; if (cairo !is null) { if (width is height) { if (arcAngle >= 0) { Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } else { Cairo.cairo_arc(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } Cairo.cairo_line_to(cairo, x + width / 2f, y + height / 2f); } else { Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f); Cairo.cairo_scale(cairo, width / 2f, height / 2f); if (arcAngle >= 0) { Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } else { Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * cast(float)Compatibility.PI / 180, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180); } Cairo.cairo_line_to(cairo, 0, 0); Cairo.cairo_restore(cairo); } Cairo.cairo_fill(cairo); return; } OS.gdk_draw_arc(data.drawable, handle, 1, x, y, width, height, startAngle * 64, arcAngle * 64); } /** * Fills the interior of the specified rectangle with a gradient * sweeping from left to right or top to bottom progressing * from the receiver's foreground color to its background color. * * @param x the x coordinate of the rectangle to be filled * @param y the y coordinate of the rectangle to be filled * @param width the width of the rectangle to be filled, may be negative * (inverts direction of gradient if horizontal) * @param height the height of the rectangle to be filled, may be negative * (inverts direction of gradient if vertical) * @param vertical if true sweeps from top to bottom, else * sweeps from left to right * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawRectangle(int, int, int, int) */ public void fillGradientRectangle(int x, int y, int width, int height, bool vertical) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if ((width is 0) || (height is 0)) return; /* Rewrite this to use GdkPixbuf */ RGB backgroundRGB, foregroundRGB; backgroundRGB = getBackground().getRGB(); foregroundRGB = getForeground().getRGB(); RGB fromRGB, toRGB; fromRGB = foregroundRGB; toRGB = backgroundRGB; bool swapColors = false; if (width < 0) { x += width; width = -width; if (! vertical) swapColors = true; } if (height < 0) { y += height; height = -height; if (vertical) swapColors = true; } if (swapColors) { fromRGB = backgroundRGB; toRGB = foregroundRGB; } if (fromRGB.opEquals(toRGB)) { fillRectangle(x, y, width, height); return; } auto cairo = data.cairo; if (cairo !is null) { cairo_pattern_t* pattern; if (vertical) { pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 0.0, 1.0); } else { pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 1.0, 0.0); } Cairo.cairo_pattern_add_color_stop_rgba (pattern, 0, fromRGB.red / 255f, fromRGB.green / 255f, fromRGB.blue / 255f, data.alpha / 255f); Cairo.cairo_pattern_add_color_stop_rgba (pattern, 1, toRGB.red / 255f, toRGB.green / 255f, toRGB.blue / 255f, data.alpha / 255f); Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, x, y); Cairo.cairo_scale(cairo, width, height); Cairo.cairo_rectangle(cairo, 0, 0, 1, 1); Cairo.cairo_set_source(cairo, pattern); Cairo.cairo_fill(cairo); Cairo.cairo_restore(cairo); Cairo.cairo_pattern_destroy(pattern); return; } ImageData.fillGradientRectangle(this, data.device, x, y, width, height, vertical, fromRGB, toRGB, 8, 8, 8); } /** * Fills the interior of an oval, within the specified * rectangular area, with the receiver's background * color. * * @param x the x coordinate of the upper left corner of the oval to be filled * @param y the y coordinate of the upper left corner of the oval to be filled * @param width the width of the oval to be filled * @param height the height of the oval to be filled * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawOval */ public void fillOval(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(FILL); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } auto cairo = data.cairo; if (cairo !is null) { if (width is height) { Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, 0, 2 * cast(float)Compatibility.PI); } else { Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f); Cairo.cairo_scale(cairo, width / 2f, height / 2f); Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, 2 * cast(float)Compatibility.PI); Cairo.cairo_restore(cairo); } Cairo.cairo_fill(cairo); return; } OS.gdk_draw_arc(data.drawable, handle, 1, x, y, width, height, 0, 23040); } /** * Fills the path described by the parameter. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param path the path to fill * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Path * * @since 3.1 */ public void fillPath (Path path) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (path.handle is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT); initCairo(); checkGC(FILL); auto cairo = data.cairo; auto copy = Cairo.cairo_copy_path(path.handle); if (copy is null) DWT.error(DWT.ERROR_NO_HANDLES); Cairo.cairo_append_path(cairo, copy); Cairo.cairo_path_destroy(copy); Cairo.cairo_fill(cairo); } /** * Fills the interior of the closed polygon which is defined by the * specified array of integer coordinates, using the receiver's * background color. The array contains alternating x and y values * which are considered to represent points which are the vertices of * the polygon. Lines are drawn between each consecutive pair, and * between the first pair and last pair in the array. * * @param pointArray an array of alternating x and y values which are the vertices of the polygon * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT if pointArray is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawPolygon */ public void fillPolygon(int[] pointArray) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); checkGC(FILL); auto cairo = data.cairo; if (cairo !is null) { drawPolyline(cairo, pointArray, true); Cairo.cairo_fill(cairo); return; } OS.gdk_draw_polygon(data.drawable, handle, 1, cast(GdkPoint*)pointArray.ptr, pointArray.length / 2); } /** * Fills the interior of the rectangle specified by the arguments, * using the receiver's background color. * * @param x the x coordinate of the rectangle to be filled * @param y the y coordinate of the rectangle to be filled * @param width the width of the rectangle to be filled * @param height the height of the rectangle to be filled * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawRectangle(int, int, int, int) */ public void fillRectangle(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(FILL); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } auto cairo = data.cairo; if (cairo !is null) { Cairo.cairo_rectangle(cairo, x, y, width, height); Cairo.cairo_fill(cairo); return; } OS.gdk_draw_rectangle(data.drawable, handle, 1, x, y, width, height); } /** * Fills the interior of the specified rectangle, using the receiver's * background color. * * @param rect the rectangle to be filled * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawRectangle(int, int, int, int) */ public void fillRectangle(Rectangle rect) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); fillRectangle(rect.x, rect.y, rect.width, rect.height); } /** * Fills the interior of the round-cornered rectangle specified by * the arguments, using the receiver's background color. * * @param x the x coordinate of the rectangle to be filled * @param y the y coordinate of the rectangle to be filled * @param width the width of the rectangle to be filled * @param height the height of the rectangle to be filled * @param arcWidth the width of the arc * @param arcHeight the height of the arc * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #drawRoundRectangle */ public void fillRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); checkGC(FILL); int nx = x; int ny = y; int nw = width; int nh = height; int naw = arcWidth; int nah = arcHeight; if (nw < 0) { nw = 0 - nw; nx = nx - nw; } if (nh < 0) { nh = 0 - nh; ny = ny -nh; } if (naw < 0) naw = 0 - naw; if (nah < 0) nah = 0 - nah; auto cairo = data.cairo; if (cairo !is null) { float naw2 = naw / 2f; float nah2 = nah / 2f; float fw = nw / naw2; float fh = nh / nah2; Cairo.cairo_save(cairo); Cairo.cairo_translate(cairo, nx, ny); Cairo.cairo_scale(cairo, naw2, nah2); Cairo.cairo_move_to(cairo, fw - 1, 0); Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0); Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0); Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI); Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0); Cairo.cairo_close_path(cairo); Cairo.cairo_restore(cairo); Cairo.cairo_fill(cairo); return; } int naw2 = naw / 2; int nah2 = nah / 2; auto drawable = data.drawable; if (nw > naw) { if (nh > nah) { OS.gdk_draw_arc(drawable, handle, 1, nx, ny, naw, nah, 5760, 5760); OS.gdk_draw_rectangle(drawable, handle, 1, nx + naw2, ny, nw - naw2 * 2, nh); OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny, naw, nah, 0, 5760); OS.gdk_draw_rectangle(drawable, handle, 1, nx, ny + nah2, naw2, nh - nah2 * 2); OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760); OS.gdk_draw_rectangle(drawable, handle, 1, nx + nw - naw2, ny + nah2, naw2, nh - nah2 * 2); OS.gdk_draw_arc(drawable, handle, 1, nx, ny + nh - nah, naw, nah, 11520, 5760); } else { OS.gdk_draw_arc(drawable, handle, 1, nx, ny, naw, nh, 5760, 11520); OS.gdk_draw_rectangle(drawable, handle, 1, nx + naw2, ny, nw - naw2 * 2, nh); OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny, naw, nh, 17280, 11520); } } else { if (nh > nah) { OS.gdk_draw_arc(drawable, handle, 1, nx, ny, nw, nah, 0, 11520); OS.gdk_draw_rectangle(drawable, handle, 1, nx, ny + nah2, nw, nh - nah2 * 2); OS.gdk_draw_arc(drawable, handle, 1, nx, ny + nh - nah, nw, nah, 11520, 11520); } else { OS.gdk_draw_arc(drawable, handle, 1, nx, ny, nw, nh, 0, 23040); } } } int fixMnemonic (char [] buffer) { int i=0, j=0; int mnemonic=-1; while (i < buffer.length) { if ((buffer [j++] = buffer [i++]) is '&') { if (i is buffer.length) {continue;} if (buffer [i] is '&') {i++; continue;} if (mnemonic is -1) mnemonic = j; j--; } } while (j < buffer.length) buffer [j++] = 0; return mnemonic; } /** * Returns the <em>advance width</em> of the specified character in * the font which is currently selected into the receiver. * <p> * The advance width is defined as the horizontal distance the cursor * should move after printing the character in the selected font. * </p> * * @param ch the character to measure * @return the distance in the x direction to move past the character before painting the next * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public int getAdvanceWidth(char ch) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); //BOGUS return stringExtent([ch]).x; } /** * Returns <code>true</code> if receiver is using the operating system's * advanced graphics subsystem. Otherwise, <code>false</code> is returned * to indicate that normal graphics are in use. * <p> * Advanced graphics may not be installed for the operating system. In this * case, <code>false</code> is always returned. Some operating system have * only one graphics subsystem. If this subsystem supports advanced graphics, * then <code>true</code> is always returned. If any graphics operation such * as alpha, antialias, patterns, interpolation, paths, clipping or transformation * has caused the receiver to switch from regular to advanced graphics mode, * <code>true</code> is returned. If the receiver has been explicitly switched * to advanced mode and this mode is supported, <code>true</code> is returned. * </p> * * @return the advanced value * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #setAdvanced * * @since 3.1 */ public bool getAdvanced() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.cairo !is null; } /** * Returns the receiver's alpha value. * * @return the alpha value * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int getAlpha() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.alpha; } /** * Returns the receiver's anti-aliasing setting value, which will be * one of <code>DWT.DEFAULT</code>, <code>DWT.OFF</code> or * <code>DWT.ON</code>. Note that this controls anti-aliasing for all * <em>non-text drawing</em> operations. * * @return the anti-aliasing setting * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #getTextAntialias * * @since 3.1 */ public int getAntialias() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null) return DWT.DEFAULT; int antialias = Cairo.cairo_get_antialias(data.cairo); switch (antialias) { case Cairo.CAIRO_ANTIALIAS_DEFAULT: return DWT.DEFAULT; case Cairo.CAIRO_ANTIALIAS_NONE: return DWT.OFF; case Cairo.CAIRO_ANTIALIAS_GRAY: case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return DWT.ON; default: } return DWT.DEFAULT; } /** * Returns the background color. * * @return the receiver's background color * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Color getBackground() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return Color.gtk_new(data.device, data.background); } /** * Returns the background pattern. The default value is * <code>null</code>. * * @return the receiver's background pattern * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Pattern * * @since 3.1 */ public Pattern getBackgroundPattern() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.backgroundPattern; } /** * Returns the width of the specified character in the font * selected into the receiver. * <p> * The width is defined as the space taken up by the actual * character, not including the leading and tailing whitespace * or overhang. * </p> * * @param ch the character to measure * @return the width of the character * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public int getCharWidth(char ch) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); //BOGUS return stringExtent([ch]).x; } /** * Returns the bounding rectangle of the receiver's clipping * region. If no clipping region is set, the return value * will be a rectangle which covers the entire bounds of the * object the receiver is drawing on. * * @return the bounding rectangle of the clipping region * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Rectangle getClipping() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); /* Calculate visible bounds in device space */ int x = 0, y = 0, width = 0, height = 0; int w, h; OS.gdk_drawable_get_size(data.drawable, &w, &h); width = w; height = h; /* Intersect visible bounds with clipping in device space and then convert then to user space */ auto cairo = data.cairo; auto clipRgn = data.clipRgn; auto damageRgn = data.damageRgn; if (clipRgn !is null || damageRgn !is null || cairo !is null) { auto rgn = OS.gdk_region_new(); GdkRectangle* rect = new GdkRectangle(); rect.width = width; rect.height = height; OS.gdk_region_union_with_rect(rgn, rect); if (damageRgn !is null) { OS.gdk_region_intersect (rgn, damageRgn); } /* Intersect visible bounds with clipping */ if (clipRgn !is null) { /* Convert clipping to device space if needed */ if (data.clippingTransform !is null) { clipRgn = convertRgn(clipRgn, data.clippingTransform); OS.gdk_region_intersect(rgn, clipRgn); OS.gdk_region_destroy(clipRgn); } else { OS.gdk_region_intersect(rgn, clipRgn); } } /* Convert to user space */ if (cairo !is null) { double[] matrix = new double[6]; Cairo.cairo_get_matrix(cairo, cast(cairo_matrix_t*)matrix.ptr); Cairo.cairo_matrix_invert(cast(cairo_matrix_t*)matrix.ptr); clipRgn = convertRgn(rgn, matrix); OS.gdk_region_destroy(rgn); rgn = clipRgn; } OS.gdk_region_get_clipbox(rgn, rect); OS.gdk_region_destroy(rgn); x = rect.x; y = rect.y; width = rect.width; height = rect.height; } return new Rectangle(x, y, width, height); } /** * Sets the region managed by the argument to the current * clipping region of the receiver. * * @param region the region to fill with the clipping region * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the region is null</li> * <li>ERROR_INVALID_ARGUMENT - if the region is disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void getClipping(Region region) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); auto clipping = region.handle; OS.gdk_region_subtract(clipping, clipping); auto cairo = data.cairo; auto clipRgn = data.clipRgn; if (clipRgn is null) { int width,height; OS.gdk_drawable_get_size(data.drawable, &width, &height); GdkRectangle* rect = new GdkRectangle(); rect.width = width; rect.height = height; OS.gdk_region_union_with_rect(clipping, rect); } else { /* Convert clipping to device space if needed */ if (data.clippingTransform !is null) { auto rgn = convertRgn(clipRgn, data.clippingTransform); OS.gdk_region_union(clipping, rgn); OS.gdk_region_destroy(rgn); } else { OS.gdk_region_union(clipping, clipRgn); } } if (data.damageRgn !is null) { OS.gdk_region_intersect(clipping, data.damageRgn); } /* Convert to user space */ if (cairo !is null) { double[] matrix = new double[6]; Cairo.cairo_get_matrix(cairo, cast(cairo_matrix_t*)matrix.ptr); Cairo.cairo_matrix_invert(cast(cairo_matrix_t*)matrix.ptr); auto rgn = convertRgn(clipping, matrix); OS.gdk_region_subtract(clipping, clipping); OS.gdk_region_union(clipping, rgn); OS.gdk_region_destroy(rgn); } } /** * Returns the receiver's fill rule, which will be one of * <code>DWT.FILL_EVEN_ODD</code> or <code>DWT.FILL_WINDING</code>. * * @return the receiver's fill rule * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int getFillRule() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); auto cairo = data.cairo; if (cairo is null) return DWT.FILL_EVEN_ODD; return Cairo.cairo_get_fill_rule(cairo) is Cairo.CAIRO_FILL_RULE_WINDING ? DWT.FILL_WINDING : DWT.FILL_EVEN_ODD; } /** * Returns the font currently being used by the receiver * to draw and measure text. * * @return the receiver's font * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Font getFont() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return Font.gtk_new(data.device, data.font); } /** * Returns a FontMetrics which contains information * about the font currently being used by the receiver * to draw and measure text. * * @return font metrics for the receiver's font * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public FontMetrics getFontMetrics() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.context is null) createLayout(); checkGC(FONT); auto context = data.context; auto lang = OS.pango_context_get_language(context); auto metrics = OS.pango_context_get_metrics(context, data.font, lang); FontMetrics fm = new FontMetrics(); fm.ascent = OS.PANGO_PIXELS(OS.pango_font_metrics_get_ascent(metrics)); fm.descent = OS.PANGO_PIXELS(OS.pango_font_metrics_get_descent(metrics)); fm.averageCharWidth = OS.PANGO_PIXELS(OS.pango_font_metrics_get_approximate_char_width(metrics)); fm.height = fm.ascent + fm.descent; OS.pango_font_metrics_unref(metrics); return fm; } /** * Returns the receiver's foreground color. * * @return the color used for drawing foreground things * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Color getForeground() { if (handle is null) DWT.error(DWT.ERROR_WIDGET_DISPOSED); return Color.gtk_new(data.device, data.foreground); } /** * Returns the foreground pattern. The default value is * <code>null</code>. * * @return the receiver's foreground pattern * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Pattern * * @since 3.1 */ public Pattern getForegroundPattern() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.foregroundPattern; } /** * Returns the GCData. * <p> * <b>IMPORTANT:</b> This method is <em>not</em> part of the public * API for <code>GC</code>. It is marked public only so that it * can be shared within the packages provided by DWT. It is not * available on all platforms, and should never be called from * application code. * </p> * * @return the receiver's GCData * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see GCData * * @since 3.2 */ public GCData getGCData() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data; } /** * Returns the receiver's interpolation setting, which will be one of * <code>DWT.DEFAULT</code>, <code>DWT.NONE</code>, * <code>DWT.LOW</code> or <code>DWT.HIGH</code>. * * @return the receiver's interpolation setting * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int getInterpolation() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.interpolation; } /** * Returns the receiver's line attributes. * * @return the line attributes used for drawing lines * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.3 */ public LineAttributes getLineAttributes() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); float[] dashes = null; if (data.lineDashes !is null) { dashes = new float[data.lineDashes.length]; System.arraycopy(data.lineDashes, 0, dashes, 0, dashes.length); } return new LineAttributes(data.lineWidth, data.lineCap, data.lineJoin, data.lineStyle, dashes, data.lineDashesOffset, data.lineMiterLimit); } /** * Returns the receiver's line cap style, which will be one * of the constants <code>DWT.CAP_FLAT</code>, <code>DWT.CAP_ROUND</code>, * or <code>DWT.CAP_SQUARE</code>. * * @return the cap style used for drawing lines * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int getLineCap() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.lineCap; } /** * Returns the receiver's line dash style. The default value is * <code>null</code>. * * @return the line dash style used for drawing lines * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int[] getLineDash() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.lineDashes is null) return null; int[] lineDashes = new int[data.lineDashes.length]; for (int i = 0; i < lineDashes.length; i++) { lineDashes[i] = cast(int)data.lineDashes[i]; } return lineDashes; } /** * Returns the receiver's line join style, which will be one * of the constants <code>DWT.JOIN_MITER</code>, <code>DWT.JOIN_ROUND</code>, * or <code>DWT.JOIN_BEVEL</code>. * * @return the join style used for drawing lines * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public int getLineJoin() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.lineJoin; } /** * Returns the receiver's line style, which will be one * of the constants <code>DWT.LINE_SOLID</code>, <code>DWT.LINE_DASH</code>, * <code>DWT.LINE_DOT</code>, <code>DWT.LINE_DASHDOT</code> or * <code>DWT.LINE_DASHDOTDOT</code>. * * @return the style used for drawing lines * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public int getLineStyle() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.lineStyle; } /** * Returns the width that will be used when drawing lines * for all of the figure drawing operations (that is, * <code>drawLine</code>, <code>drawRectangle</code>, * <code>drawPolyline</code>, and so forth. * * @return the receiver's line width * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public int getLineWidth() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return cast(int)data.lineWidth; } /** * Returns the receiver's style information. * <p> * Note that the value which is returned by this method <em>may * not match</em> the value which was provided to the constructor * when the receiver was created. This can occur when the underlying * operating system does not support a particular combination of * requested styles. * </p> * * @return the style bits * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 2.1.2 */ public int getStyle () { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.style; } /** * Returns the receiver's text drawing anti-aliasing setting value, * which will be one of <code>DWT.DEFAULT</code>, <code>DWT.OFF</code> or * <code>DWT.ON</code>. Note that this controls anti-aliasing * <em>only</em> for text drawing operations. * * @return the anti-aliasing setting * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #getAntialias * * @since 3.1 */ public int getTextAntialias() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null) return DWT.DEFAULT; int antialias = Cairo.CAIRO_ANTIALIAS_DEFAULT; if (OS.GTK_VERSION < OS.buildVERSION(2, 8, 0)) { auto options = Cairo.cairo_font_options_create(); Cairo.cairo_get_font_options(data.cairo, options); antialias = Cairo.cairo_font_options_get_antialias(options); Cairo.cairo_font_options_destroy(options); } else { if (data.context !is null) { auto options = OS.pango_cairo_context_get_font_options(data.context); if (options !is null) antialias = Cairo.cairo_font_options_get_antialias(options); } } switch (antialias) { case Cairo.CAIRO_ANTIALIAS_DEFAULT: return DWT.DEFAULT; case Cairo.CAIRO_ANTIALIAS_NONE: return DWT.OFF; case Cairo.CAIRO_ANTIALIAS_GRAY: case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return DWT.ON; default: } return DWT.DEFAULT; } /** * Sets the parameter to the transform that is currently being * used by the receiver. * * @param transform the destination to copy the transform into * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Transform * * @since 3.1 */ public void getTransform(Transform transform) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (transform is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (transform.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); auto cairo = data.cairo; if (cairo !is null) { Cairo.cairo_get_matrix(cairo, cast(cairo_matrix_t*)transform.handle.ptr); } else { transform.setElements(1, 0, 0, 1, 0, 0); } } /** * Returns <code>true</code> if this GC is drawing in the mode * where the resulting color in the destination is the * <em>exclusive or</em> of the color values in the source * and the destination, and <code>false</code> if it is * drawing in the mode where the destination color is being * replaced with the source color value. * * @return <code>true</code> true if the receiver is in XOR mode, and false otherwise * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool getXORMode() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.xorMode; } /** * Returns an integer hash code for the receiver. Any two * objects that return <code>true</code> when passed to * <code>equals</code> must return the same value for this * method. * * @return the receiver's hash * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #equals */ public override hash_t toHash() { return cast(hash_t)/*64*/handle; } void init(Drawable drawable, GCData data, GdkGC* gdkGC) { if (data.foreground !is null) data.state &= ~FOREGROUND; if (data.background !is null) data.state &= ~(BACKGROUND | BACKGROUND_BG); if (data.font !is null) data.state &= ~FONT; Image image = data.image; if (image !is null) { image.memGC = this; /* * The transparent pixel mask might change when drawing on * the image. Destroy it so that it is regenerated when * necessary. */ if (image.transparentPixel !is -1) image.destroyMask(); } this.drawable = drawable; this.data = data; handle = gdkGC; } void initCairo() { data.device.checkCairo(); auto cairo = data.cairo; if (cairo !is null) return; auto xDisplay = OS.GDK_DISPLAY(); auto xVisual = OS.gdk_x11_visual_get_xvisual(OS.gdk_visual_get_system()); uint xDrawable; int translateX = 0, translateY = 0; auto drawable = data.drawable; if (data.image !is null) { xDrawable = OS.GDK_PIXMAP_XID(drawable); } else { int x, y; GdkDrawable* real_drawable; OS.gdk_window_get_internal_paint_info(cast(GdkWindow*)drawable, &real_drawable, &x, &y); xDrawable = OS.gdk_x11_drawable_get_xid(real_drawable); translateX = -x; translateY = -y; } int w, h; OS.gdk_drawable_get_size(drawable, &w, &h); int width = w, height = h; auto surface = Cairo.cairo_xlib_surface_create(cast(void*)xDisplay, xDrawable, xVisual, width, height); if (surface is null) DWT.error(DWT.ERROR_NO_HANDLES); Cairo.cairo_surface_set_device_offset(surface, translateX, translateY); data.cairo = cairo = Cairo.cairo_create(surface); Cairo.cairo_surface_destroy(surface); if (cairo is null) DWT.error(DWT.ERROR_NO_HANDLES); data.disposeCairo = true; Cairo.cairo_set_fill_rule(cairo, Cairo.CAIRO_FILL_RULE_EVEN_ODD); data.state &= ~(BACKGROUND | FOREGROUND | FONT | LINE_WIDTH | LINE_CAP | LINE_JOIN | LINE_STYLE | DRAW_OFFSET); setCairoClip(cairo, data.clipRgn); } /** * Returns <code>true</code> if the receiver has a clipping * region set into it, and <code>false</code> otherwise. * If this method returns false, the receiver will draw on all * available space in the destination. If it returns true, * it will draw only in the area that is covered by the region * that can be accessed with <code>getClipping(region)</code>. * * @return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool isClipped() { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return data.clipRgn !is null; } /** * Returns <code>true</code> if the GC has been disposed, * and <code>false</code> otherwise. * <p> * This method gets the dispose state for the GC. * When a GC has been disposed, it is an error to * invoke any other method using the GC. * * @return <code>true</code> when the GC is disposed and <code>false</code> otherwise */ public override bool isDisposed() { return handle is null; } bool isIdentity(double[] matrix) { if (matrix is null) return true; return matrix[0] is 1 && matrix[1] is 0 && matrix[2] is 0 && matrix[3] is 1 && matrix[4] is 0 && matrix[5] is 0; } /** * Sets the receiver to always use the operating system's advanced graphics * subsystem for all graphics operations if the argument is <code>true</code>. * If the argument is <code>false</code>, the advanced graphics subsystem is * no longer used, advanced graphics state is cleared and the normal graphics * subsystem is used from now on. * <p> * Normally, the advanced graphics subsystem is invoked automatically when * any one of the alpha, antialias, patterns, interpolation, paths, clipping * or transformation operations in the receiver is requested. When the receiver * is switched into advanced mode, the advanced graphics subsystem performs both * advanced and normal graphics operations. Because the two subsystems are * different, their output may differ. Switching to advanced graphics before * any graphics operations are performed ensures that the output is consistent. * </p><p> * Advanced graphics may not be installed for the operating system. In this * case, this operation does nothing. Some operating system have only one * graphics subsystem, so switching from normal to advanced graphics does * nothing. However, switching from advanced to normal graphics will always * clear the advanced graphics state, even for operating systems that have * only one graphics subsystem. * </p> * * @param advanced the new advanced graphics state * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see #setAlpha * @see #setAntialias * @see #setBackgroundPattern * @see #setClipping(Path) * @see #setForegroundPattern * @see #setLineAttributes * @see #setInterpolation * @see #setTextAntialias * @see #setTransform * @see #getAdvanced * * @since 3.1 */ public void setAdvanced(bool advanced) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (advanced && data.cairo !is null) return; if (advanced) { try { initCairo(); } catch (DWTException e) {} } else { if (!data.disposeCairo) return; auto cairo = data.cairo; if (cairo !is null) Cairo.cairo_destroy(cairo); data.cairo = null; data.interpolation = DWT.DEFAULT; data.backgroundPattern = data.foregroundPattern = null; data.state = 0; setClipping(cast(GdkRegion*)null); } } /** * Sets the receiver's alpha value. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * @param alpha the alpha value * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setAlpha(int alpha) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null && (alpha & 0xff) is 0xff) return; initCairo(); data.alpha = alpha & 0xff; data.state &= ~(BACKGROUND | FOREGROUND | BACKGROUND_BG); } /** * Sets the receiver's anti-aliasing value to the parameter, * which must be one of <code>DWT.DEFAULT</code>, <code>DWT.OFF</code> * or <code>DWT.ON</code>. Note that this controls anti-aliasing for all * <em>non-text drawing</em> operations. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param antialias the anti-aliasing setting * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>DWT.DEFAULT</code>, * <code>DWT.OFF</code> or <code>DWT.ON</code></li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see #getAdvanced * @see #setAdvanced * @see #setTextAntialias * * @since 3.1 */ public void setAntialias(int antialias) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null && antialias is DWT.DEFAULT) return; int mode = 0; switch (antialias) { case DWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break; case DWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break; case DWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY; break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } initCairo(); auto cairo = data.cairo; Cairo.cairo_set_antialias(cairo, mode); } /** * Sets the background color. The background color is used * for fill operations and as the background color when text * is drawn. * * @param color the new background color for the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the color is null</li> * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setBackground(Color color) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (color is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (color.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); data.background = color.handle; data.backgroundPattern = null; data.state &= ~(BACKGROUND | BACKGROUND_BG); } /** * Sets the background pattern. The default value is <code>null</code>. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param pattern the new background pattern * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Pattern * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setBackgroundPattern(Pattern pattern) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pattern !is null && pattern.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (data.cairo is null && pattern is null) return; initCairo(); if (data.backgroundPattern is pattern) return; data.backgroundPattern = pattern; data.state &= ~BACKGROUND; } static void setCairoFont(cairo_t* cairo, Font font) { setCairoFont(cairo, font.handle); } static void setCairoFont(cairo_t* cairo, PangoFontDescription* font) { auto family = OS.pango_font_description_get_family(font); int len = /*OS.*/strlen(family); char[] buffer = new char[len + 1]; memmove(buffer.ptr, family, len); //TODO - convert font height from pango to cairo double height = OS.PANGO_PIXELS(OS.pango_font_description_get_size(font)) * 96 / 72; int pangoStyle = OS.pango_font_description_get_style(font); int pangoWeight = OS.pango_font_description_get_weight(font); int slant = Cairo.CAIRO_FONT_SLANT_NORMAL; if (pangoStyle is OS.PANGO_STYLE_ITALIC) slant = Cairo.CAIRO_FONT_SLANT_ITALIC; if (pangoStyle is OS.PANGO_STYLE_OBLIQUE) slant = Cairo.CAIRO_FONT_SLANT_OBLIQUE; int weight = Cairo.CAIRO_FONT_WEIGHT_NORMAL; if (pangoWeight is OS.PANGO_WEIGHT_BOLD) weight = Cairo.CAIRO_FONT_WEIGHT_BOLD; Cairo.cairo_select_font_face(cairo, buffer.ptr, slant, weight); Cairo.cairo_set_font_size(cairo, height); } static void setCairoClip(cairo_t* cairo, GdkRegion* clipRgn) { Cairo.cairo_reset_clip(cairo); if (clipRgn is null) return; if (OS.GTK_VERSION >= OS.buildVERSION(2, 8, 0)) { OS.gdk_cairo_region(cairo, clipRgn); } else { int nRects; GdkRectangle * rects; OS.gdk_region_get_rectangles(clipRgn, &rects, &nRects); GdkRectangle* rect = new GdkRectangle(); for (int i=0; i<nRects; i++) { Cairo.cairo_rectangle(cairo, rects[i].x, rects[i].y, rects[i].width, rects[i].height); } if (rects !is null) OS.g_free(rects); } Cairo.cairo_clip(cairo); } static void setCairoPatternColor( cairo_pattern_t* pattern, int offset, Color c, int alpha) { GdkColor* color = c.handle; double aa = (alpha & 0xFF) / cast(double)0xFF; double red = ((color.red & 0xFFFF) / cast(double)0xFFFF); double green = ((color.green & 0xFFFF) / cast(double)0xFFFF); double blue = ((color.blue & 0xFFFF) / cast(double)0xFFFF); Cairo.cairo_pattern_add_color_stop_rgba(pattern, offset, red, green, blue, aa); } void setClipping(GdkRegion* clipRgn) { auto cairo = data.cairo; if (clipRgn is null) { if (data.clipRgn !is null) { OS.gdk_region_destroy(data.clipRgn); data.clipRgn = null; } if (cairo !is null) { data.clippingTransform = null; setCairoClip(cairo, clipRgn); } else { auto clipping = data.damageRgn !is null ? data.damageRgn : null; OS.gdk_gc_set_clip_region(handle, clipping); } } else { if (data.clipRgn is null) data.clipRgn = OS.gdk_region_new(); OS.gdk_region_subtract(data.clipRgn, data.clipRgn); OS.gdk_region_union(data.clipRgn, clipRgn); if (cairo !is null) { if (data.clippingTransform is null) data.clippingTransform = new double[6]; Cairo.cairo_get_matrix(cairo,cast(cairo_matrix_t *) data.clippingTransform.ptr); setCairoClip(cairo, clipRgn); } else { auto clipping = clipRgn; if (data.damageRgn !is null) { clipping = OS.gdk_region_new(); OS.gdk_region_union(clipping, clipRgn); OS.gdk_region_intersect(clipping, data.damageRgn); } OS.gdk_gc_set_clip_region(handle, clipping); if (clipping !is clipRgn) OS.gdk_region_destroy(clipping); } } } /** * Sets the area of the receiver which can be changed * by drawing operations to the rectangular area specified * by the arguments. * * @param x the x coordinate of the clipping rectangle * @param y the y coordinate of the clipping rectangle * @param width the width of the clipping rectangle * @param height the height of the clipping rectangle * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setClipping(int x, int y, int width, int height) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (width < 0) { x = x + width; width = -width; } if (height < 0) { y = y + height; height = -height; } GdkRectangle* rect = new GdkRectangle(); rect.x = x; rect.y = y; rect.width = width; rect.height = height; auto clipRgn = OS.gdk_region_new(); OS.gdk_region_union_with_rect(clipRgn, rect); setClipping(clipRgn); OS.gdk_region_destroy(clipRgn); } /** * Sets the area of the receiver which can be changed * by drawing operations to the path specified * by the argument. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param path the clipping path. * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Path * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setClipping(Path path) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (path !is null && path.isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); setClipping(cast(GdkRegion*)null); if (path !is null) { initCairo(); auto cairo = data.cairo; auto copy = Cairo.cairo_copy_path(path.handle); if (copy is null) DWT.error(DWT.ERROR_NO_HANDLES); Cairo.cairo_append_path(cairo, copy); Cairo.cairo_path_destroy(copy); Cairo.cairo_clip(cairo); } } /** * Sets the area of the receiver which can be changed * by drawing operations to the rectangular area specified * by the argument. Specifying <code>null</code> for the * rectangle reverts the receiver's clipping area to its * original value. * * @param rect the clipping rectangle or <code>null</code> * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setClipping(Rectangle rect) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (rect is null) { setClipping(cast(GdkRegion*)null); } else { setClipping(rect.x, rect.y, rect.width, rect.height); } } /** * Sets the area of the receiver which can be changed * by drawing operations to the region specified * by the argument. Specifying <code>null</code> for the * region reverts the receiver's clipping area to its * original value. * * @param region the clipping region or <code>null</code> * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the region has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setClipping(Region region) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (region !is null && region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); setClipping(region !is null ? region.handle : cast(GdkRegion*)null); } /** * Sets the font which will be used by the receiver * to draw and measure text to the argument. If the * argument is null, then a default font appropriate * for the platform will be used instead. * * @param font the new font for the receiver, or null to indicate a default font * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setFont(Font font) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (font is null) font = data.device.systemFont; if (font.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); data.font = font.handle; data.state &= ~FONT; data.stringWidth = data.stringHeight = -1; } /** * Sets the receiver's fill rule to the parameter, which must be one of * <code>DWT.FILL_EVEN_ODD</code> or <code>DWT.FILL_WINDING</code>. * * @param rule the new fill rule * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>DWT.FILL_EVEN_ODD</code> * or <code>DWT.FILL_WINDING</code></li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void setFillRule(int rule) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); int cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD; switch (rule) { case DWT.FILL_WINDING: cairo_mode = Cairo.CAIRO_FILL_RULE_WINDING; break; case DWT.FILL_EVEN_ODD: cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD; break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } //TODO - need fill rule in X, GDK has no API initCairo(); auto cairo = data.cairo; if (cairo !is null) { Cairo.cairo_set_fill_rule(cairo, cairo_mode); } } /** * Sets the foreground color. The foreground color is used * for drawing operations including when text is drawn. * * @param color the new foreground color for the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the color is null</li> * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setForeground(Color color) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (color is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (color.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); data.foreground = color.handle; data.foregroundPattern = null; data.state &= ~FOREGROUND; } /** * Sets the foreground pattern. The default value is <code>null</code>. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * @param pattern the new foreground pattern * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Pattern * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setForegroundPattern(Pattern pattern) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pattern !is null && pattern.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (data.cairo is null && pattern is null) return; initCairo(); if (data.foregroundPattern is pattern) return; data.foregroundPattern = pattern; data.state &= ~FOREGROUND; } /** * Sets the receiver's interpolation setting to the parameter, which * must be one of <code>DWT.DEFAULT</code>, <code>DWT.NONE</code>, * <code>DWT.LOW</code> or <code>DWT.HIGH</code>. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param interpolation the new interpolation setting * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>DWT.DEFAULT</code>, * <code>DWT.NONE</code>, <code>DWT.LOW</code> or <code>DWT.HIGH</code> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setInterpolation(int interpolation) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null && interpolation is DWT.DEFAULT) return; switch (interpolation) { case DWT.DEFAULT: case DWT.NONE: case DWT.LOW: case DWT.HIGH: break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } initCairo(); data.interpolation = interpolation; } /** * Sets the receiver's line attributes. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * @param attributes the line attributes * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the attributes is null</li> * <li>ERROR_INVALID_ARGUMENT - if any of the line attributes is not valid</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see LineAttributes * @see #getAdvanced * @see #setAdvanced * * @since 3.3 */ public void setLineAttributes(LineAttributes attributes) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (attributes is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); int mask = 0; float lineWidth = attributes.width; if (lineWidth !is data.lineWidth) { mask |= LINE_WIDTH | DRAW_OFFSET; } int lineStyle = attributes.style; if (lineStyle !is data.lineStyle) { mask |= LINE_STYLE; switch (lineStyle) { case DWT.LINE_SOLID: case DWT.LINE_DASH: case DWT.LINE_DOT: case DWT.LINE_DASHDOT: case DWT.LINE_DASHDOTDOT: break; case DWT.LINE_CUSTOM: if (attributes.dash is null) lineStyle = DWT.LINE_SOLID; break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } } int join = attributes.join; if (join !is data.lineJoin) { mask |= LINE_JOIN; switch (join) { case DWT.CAP_ROUND: case DWT.CAP_FLAT: case DWT.CAP_SQUARE: break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } } int cap = attributes.join; if (cap !is data.lineCap) { mask |= LINE_CAP; switch (cap) { case DWT.JOIN_MITER: case DWT.JOIN_ROUND: case DWT.JOIN_BEVEL: break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } } float[] dashes = attributes.dash; float[] lineDashes = data.lineDashes; if (dashes !is null && dashes.length > 0) { bool changed = lineDashes is null || lineDashes.length !is dashes.length; for (int i = 0; i < dashes.length; i++) { float dash = dashes[i]; if (dash <= 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (!changed && lineDashes[i] !is dash) changed = true; } if (changed) { float[] newDashes = new float[dashes.length]; System.arraycopy(dashes, 0, newDashes, 0, dashes.length); dashes = newDashes; mask |= LINE_STYLE; } else { dashes = lineDashes; } } else { if (lineDashes !is null && lineDashes.length > 0) { mask |= LINE_STYLE; } else { dashes = lineDashes; } } float dashOffset = attributes.dashOffset; if (dashOffset !is data.lineDashesOffset) { mask |= LINE_STYLE; } float miterLimit = attributes.miterLimit; if (miterLimit !is data.lineMiterLimit) { mask |= LINE_MITERLIMIT; } initCairo(); if (mask is 0) return; data.lineWidth = lineWidth; data.lineStyle = lineStyle; data.lineCap = cap; data.lineJoin = join; data.lineDashes = dashes; data.lineDashesOffset = dashOffset; data.lineMiterLimit = miterLimit; data.state &= ~mask; } /** * Sets the receiver's line cap style to the argument, which must be one * of the constants <code>DWT.CAP_FLAT</code>, <code>DWT.CAP_ROUND</code>, * or <code>DWT.CAP_SQUARE</code>. * * @param cap the cap style to be used for drawing lines * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void setLineCap(int cap) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.lineCap is cap) return; switch (cap) { case DWT.CAP_ROUND: case DWT.CAP_FLAT: case DWT.CAP_SQUARE: break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } data.lineCap = cap; data.state &= ~LINE_CAP; } /** * Sets the receiver's line dash style to the argument. The default * value is <code>null</code>. If the argument is not <code>null</code>, * the receiver's line style is set to <code>DWT.LINE_CUSTOM</code>, otherwise * it is set to <code>DWT.LINE_SOLID</code>. * * @param dashes the dash style to be used for drawing lines * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if any of the values in the array is less than or equal 0</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void setLineDash(int[] dashes) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); float[] lineDashes = data.lineDashes; if (dashes !is null && dashes.length > 0) { bool changed = data.lineStyle !is DWT.LINE_CUSTOM || lineDashes is null || lineDashes.length !is dashes.length; for (int i = 0; i < dashes.length; i++) { int dash = dashes[i]; if (dash <= 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (!changed && lineDashes[i] !is dash) changed = true; } if (!changed) return; data.lineDashes = new float[dashes.length]; for (int i = 0; i < dashes.length; i++) { data.lineDashes[i] = dashes[i]; } data.lineStyle = DWT.LINE_CUSTOM; } else { if (data.lineStyle is DWT.LINE_SOLID && (lineDashes is null || lineDashes.length is 0)) return; data.lineDashes = null; data.lineStyle = DWT.LINE_SOLID; } data.state &= ~LINE_STYLE; } /** * Sets the receiver's line join style to the argument, which must be one * of the constants <code>DWT.JOIN_MITER</code>, <code>DWT.JOIN_ROUND</code>, * or <code>DWT.JOIN_BEVEL</code>. * * @param join the join style to be used for drawing lines * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void setLineJoin(int join) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.lineJoin is join) return; switch (join) { case DWT.JOIN_MITER: case DWT.JOIN_ROUND: case DWT.JOIN_BEVEL: break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } data.lineJoin = join; data.state &= ~LINE_JOIN; } /** * Sets the receiver's line style to the argument, which must be one * of the constants <code>DWT.LINE_SOLID</code>, <code>DWT.LINE_DASH</code>, * <code>DWT.LINE_DOT</code>, <code>DWT.LINE_DASHDOT</code> or * <code>DWT.LINE_DASHDOTDOT</code>. * * @param lineStyle the style to be used for drawing lines * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setLineStyle(int lineStyle) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.lineStyle is lineStyle) return; switch (lineStyle) { case DWT.LINE_SOLID: case DWT.LINE_DASH: case DWT.LINE_DOT: case DWT.LINE_DASHDOT: case DWT.LINE_DASHDOTDOT: break; case DWT.LINE_CUSTOM: if (data.lineDashes is null) lineStyle = DWT.LINE_SOLID; break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } data.lineStyle = lineStyle; data.state &= ~LINE_STYLE; } /** * Sets the width that will be used when drawing lines * for all of the figure drawing operations (that is, * <code>drawLine</code>, <code>drawRectangle</code>, * <code>drawPolyline</code>, and so forth. * <p> * Note that line width of zero is used as a hint to * indicate that the fastest possible line drawing * algorithms should be used. This means that the * output may be different from line width one. * </p> * * @param lineWidth the width of a line * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void setLineWidth(int lineWidth) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.lineWidth is lineWidth) return; data.lineWidth = lineWidth; data.state &= ~(LINE_WIDTH | DRAW_OFFSET); } void setString(char[] str, int flags) { if (data.layout is null) createLayout(); if (str is data.str && (flags & ~DWT.DRAW_TRANSPARENT) is (data.drawFlags & ~DWT.DRAW_TRANSPARENT)) { return; } char[] buffer; int mnemonic, len = str.length ; auto layout = data.layout; char[] text = str.dup; if ((flags & DWT.DRAW_MNEMONIC) !is 0 && (mnemonic = fixMnemonic(text)) !is -1) { char[] text1 = new char[mnemonic - 1]; System.arraycopy(text, 0, text1, 0, text1.length); char[] buffer1 = text1.dup; char[] text2 = new char[text.length - mnemonic]; System.arraycopy(text, mnemonic - 1, text2, 0, text2.length); char[] buffer2 = text2.dup; buffer = new char[buffer1.length + buffer2.length]; System.arraycopy(buffer1, 0, buffer, 0, buffer1.length); System.arraycopy(buffer2, 0, buffer, buffer1.length, buffer2.length); auto attr_list = OS.pango_attr_list_new(); auto attr = OS.pango_attr_underline_new(OS.PANGO_UNDERLINE_LOW); attr.start_index = buffer1.length; attr.end_index = buffer1.length + 1; OS.pango_attr_list_insert(attr_list, attr); OS.pango_layout_set_attributes(layout, attr_list); OS.pango_attr_list_unref(attr_list); } else { buffer = text.dup; OS.pango_layout_set_attributes(layout, null); } OS.pango_layout_set_text(layout, buffer.ptr, buffer.length); OS.pango_layout_set_single_paragraph_mode(layout, (flags & DWT.DRAW_DELIMITER) is 0); OS.pango_layout_set_tabs(layout, (flags & DWT.DRAW_TAB) !is 0 ? null : data.device.emptyTab); data.str = str; data.stringWidth = data.stringHeight = -1; data.drawFlags = flags; } /** * Sets the receiver's text anti-aliasing value to the parameter, * which must be one of <code>DWT.DEFAULT</code>, <code>DWT.OFF</code> * or <code>DWT.ON</code>. Note that this controls anti-aliasing only * for all <em>text drawing</em> operations. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param antialias the anti-aliasing setting * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>DWT.DEFAULT</code>, * <code>DWT.OFF</code> or <code>DWT.ON</code></li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see #getAdvanced * @see #setAdvanced * @see #setAntialias * * @since 3.1 */ public void setTextAntialias(int antialias) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (data.cairo is null && antialias is DWT.DEFAULT) return; int mode = 0; switch (antialias) { case DWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break; case DWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break; case DWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY; break; default: DWT.error(DWT.ERROR_INVALID_ARGUMENT); } initCairo(); auto options = Cairo.cairo_font_options_create(); Cairo.cairo_font_options_set_antialias(options, mode); if (OS.GTK_VERSION < OS.buildVERSION(2, 8, 0)) { Cairo.cairo_set_font_options(data.cairo, options); } else { if (data.context is null) createLayout(); OS.pango_cairo_context_set_font_options(data.context, options); } Cairo.cairo_font_options_destroy(options); } /** * Sets the transform that is currently being used by the receiver. If * the argument is <code>null</code>, the current transform is set to * the identity transform. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param transform the transform to set * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * * @see Transform * @see #getAdvanced * @see #setAdvanced * * @since 3.1 */ public void setTransform(Transform transform) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (transform !is null && transform.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (data.cairo is null && transform is null) return; initCairo(); auto cairo = data.cairo; if (transform !is null) { Cairo.cairo_set_matrix(cairo,cast(cairo_matrix_t*) transform.handle.ptr); } else { Cairo.cairo_identity_matrix(cairo); } data.state &= ~DRAW_OFFSET; } /** * If the argument is <code>true</code>, puts the receiver * in a drawing mode where the resulting color in the destination * is the <em>exclusive or</em> of the color values in the source * and the destination, and if the argument is <code>false</code>, * puts the receiver in a drawing mode where the destination color * is replaced with the source color value. * <p> * Note that this mode in fundamentally unsupportable on certain * platforms, notably Carbon (Mac OS X). Clients that want their * code to run on all platforms need to avoid this method. * </p> * * @param xor if <code>true</code>, then <em>xor</em> mode is used, otherwise <em>source copy</em> mode is used * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @deprecated this functionality is not supported on some platforms */ public void setXORMode(bool xor) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); OS.gdk_gc_set_function(handle, xor ? OS.GDK_XOR : OS.GDK_COPY); data.xorMode = xor; } /** * Returns the extent of the given str. No tab * expansion or carriage return processing will be performed. * <p> * The <em>extent</em> of a str is the width and height of * the rectangular area it would cover if drawn in a particular * font (in this case, the current font in the receiver). * </p> * * @param str the str to measure * @return a point containing the extent of the str * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Point stringExtent(char[] str) { return textExtent(str, 0); } /** * Returns the extent of the given str. Tab expansion and * carriage return processing are performed. * <p> * The <em>extent</em> of a str is the width and height of * the rectangular area it would cover if drawn in a particular * font (in this case, the current font in the receiver). * </p> * * @param str the str to measure * @return a point containing the extent of the str * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Point textExtent(char[] str) { return textExtent(str, DWT.DRAW_DELIMITER | DWT.DRAW_TAB); } /** * Returns the extent of the given str. Tab expansion, line * delimiter and mnemonic processing are performed according to * the specified flags, which can be a combination of: * <dl> * <dt><b>DRAW_DELIMITER</b></dt> * <dd>draw multiple lines</dd> * <dt><b>DRAW_TAB</b></dt> * <dd>expand tabs</dd> * <dt><b>DRAW_MNEMONIC</b></dt> * <dd>underline the mnemonic character</dd> * <dt><b>DRAW_TRANSPARENT</b></dt> * <dd>transparent background</dd> * </dl> * <p> * The <em>extent</em> of a str is the width and height of * the rectangular area it would cover if drawn in a particular * font (in this case, the current font in the receiver). * </p> * * @param str the str to measure * @param flags the flags specifying how to process the text * @return a point containing the extent of the str * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the str is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public Point textExtent(char[] str, int flags) { if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (str is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); auto cairo = data.cairo; if (cairo !is null) { if (OS.GTK_VERSION < OS.buildVERSION(2, 8, 0)) { //TODO - honor flags checkGC(FONT); char* buffer = toStringz(str); cairo_font_extents_t* font_extents = new cairo_font_extents_t(); Cairo.cairo_font_extents(cairo, font_extents); cairo_text_extents_t* extents = new cairo_text_extents_t(); Cairo.cairo_text_extents(cairo, buffer, extents); return new Point(cast(int)extents.width, cast(int)font_extents.height); } } setString(str, flags); checkGC(FONT); if (data.stringWidth !is -1) return new Point(data.stringWidth, data.stringHeight); int width, height; OS.pango_layout_get_size(data.layout, &width, &height); return new Point(data.stringWidth = OS.PANGO_PIXELS(width), data.stringHeight = OS.PANGO_PIXELS(height)); } /** * Returns a str containing a concise, human-readable * description of the receiver. * * @return a str representation of the receiver */ public override char[] toString () { if (isDisposed()) return "GC {*DISPOSED*}"; return Format( "GC {{{}}", handle ); } }