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annotate dwt/opengl/GLCanvas.d @ 259:c0d810de7093

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Update SWT 3.4M7 to 3.4
author Frank Benoit <benoit@tionex.de>
date Sun, 29 Jun 2008 14:33:38 +0200
parents 384b3a0c9cd7
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D Programming Language:
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11 * John Reimer <terminal.node@gmail.com>
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12 *******************************************************************************/
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13
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14 module dwt.opengl.GLCanvas;
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15
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16 import dwt.DWT;
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17 import dwt.DWTException;
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18 import dwt.graphics.Rectangle;
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19
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20 import dwt.internal.gtk.OS;
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21 import dwt.internal.c.glx;
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22 import dwt.internal.c.gdk : GdkWindowAttr, GdkDrawable;
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23 import dwt.internal.c.Xutil : XVisualInfo;
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24
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25 import dwt.internal.opengl.glx.GLX;
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26
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27 import dwt.widgets.Canvas;
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28 import dwt.widgets.Composite;
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29 import dwt.widgets.Event;
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30 import dwt.widgets.Listener;
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31
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32 import dwt.opengl.GLData;
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33
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34 /**
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35 * GLCanvas is a widget capable of displaying OpenGL content.
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36 *
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37 * @see GLData
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38 * @see <a href="http://www.eclipse.org/swt/snippets/#opengl">OpenGL snippets</a>
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39 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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40 *
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41 * @since 3.2
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42 */
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43
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44 public class GLCanvas : Canvas {
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45 void* context;
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46 uint xWindow;
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47 GdkDrawable* glWindow;
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48 XVisualInfo vinfo;
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49 static const int MAX_ATTRIBUTES = 32;
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50
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51 /**
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52 * Create a GLCanvas widget using the attributes described in the GLData
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53 * object provided.
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54 *
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55 * @param parent a composite widget
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56 * @param style the bitwise OR'ing of widget styles
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57 * @param data the requested attributes of the GLCanvas
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58 *
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59 * @exception IllegalArgumentException
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60 * <ul><li>ERROR_NULL_ARGUMENT when the data is null
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61 * <li>ERROR_UNSUPPORTED_DEPTH when the requested attributes cannot be provided</ul>
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62 * </ul>
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63 */
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64 public this (Composite parent, int style, GLData data) {
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65 super (parent, style);
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66 if (data is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
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67 int[MAX_ATTRIBUTES] glxAttrib;
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68 int pos = 0;
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69 glxAttrib [pos++] = GLX.GLX_RGBA;
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70 if (data.doubleBuffer) glxAttrib [pos++] = GLX.GLX_DOUBLEBUFFER;
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71 if (data.stereo) glxAttrib [pos++] = GLX.GLX_STEREO;
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72 if (data.redSize > 0) {
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73 glxAttrib [pos++] = GLX.GLX_RED_SIZE;
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74 glxAttrib [pos++] = data.redSize;
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75 }
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76 if (data.greenSize > 0) {
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77 glxAttrib [pos++] = GLX.GLX_GREEN_SIZE;
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78 glxAttrib [pos++] = data.greenSize;
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79 }
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80 if (data.blueSize > 0) {
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81 glxAttrib [pos++] = GLX.GLX_BLUE_SIZE;
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82 glxAttrib [pos++] = data.blueSize;
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83 }
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84 if (data.alphaSize > 0) {
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85 glxAttrib [pos++] = GLX.GLX_ALPHA_SIZE;
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86 glxAttrib [pos++] = data.alphaSize;
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87 }
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88 if (data.depthSize > 0) {
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89 glxAttrib [pos++] = GLX.GLX_DEPTH_SIZE;
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90 glxAttrib [pos++] = data.depthSize;
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91 }
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92 if (data.stencilSize > 0) {
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93 glxAttrib [pos++] = GLX.GLX_STENCIL_SIZE;
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94 glxAttrib [pos++] = data.stencilSize;
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95 }
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96 if (data.accumRedSize > 0) {
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97 glxAttrib [pos++] = GLX.GLX_ACCUM_RED_SIZE;
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98 glxAttrib [pos++] = data.accumRedSize;
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99 }
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100 if (data.accumGreenSize > 0) {
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101 glxAttrib [pos++] = GLX.GLX_ACCUM_GREEN_SIZE;
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102 glxAttrib [pos++] = data.accumGreenSize;
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103 }
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104 if (data.accumBlueSize > 0) {
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105 glxAttrib [pos++] = GLX.GLX_ACCUM_BLUE_SIZE;
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106 glxAttrib [pos++] = data.accumBlueSize;
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107 }
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108 if (data.accumAlphaSize > 0) {
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109 glxAttrib [pos++] = GLX.GLX_ACCUM_ALPHA_SIZE;
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110 glxAttrib [pos++] = data.accumAlphaSize;
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111 }
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112 if (data.sampleBuffers > 0) {
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113 glxAttrib [pos++] = GLX.GLX_SAMPLE_BUFFERS;
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114 glxAttrib [pos++] = data.sampleBuffers;
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115 }
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116 if (data.samples > 0) {
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117 glxAttrib [pos++] = GLX.GLX_SAMPLES;
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118 glxAttrib [pos++] = data.samples;
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119 }
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120 glxAttrib [pos++] = 0;
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121 OS.gtk_widget_realize (handle);
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122 auto window = OS.GTK_WIDGET_WINDOW (handle);
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123 auto xDisplay = OS.gdk_x11_drawable_get_xdisplay (window);
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124 auto infoPtr = GLX.glXChooseVisual (xDisplay, OS.XDefaultScreen (xDisplay), glxAttrib.ptr);
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125 if (infoPtr is null) {
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126 dispose ();
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127 DWT.error (DWT.ERROR_UNSUPPORTED_DEPTH);
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128 }
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129
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130 vinfo = *infoPtr;
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131 //tango.stdc.string.memmove (vinfo, infoPtr, XVisualInfo.sizeof);
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132 OS.XFree (infoPtr);
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133 auto screen = OS.gdk_screen_get_default ();
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134 auto gdkvisual = OS.gdk_x11_screen_lookup_visual (screen, vinfo.visualid);
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135 //FIXME- share lists
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136 //context = GLX.glXCreateContext (xDisplay, info, share is null ? 0 : share.context, true);
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137 context = GLX.glXCreateContext (xDisplay, &vinfo, null, true);
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138 if (context is null)
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139 DWT.error (DWT.ERROR_NO_HANDLES);
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140 GdkWindowAttr attrs;
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141 attrs.width = 1;
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142 attrs.height = 1;
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143 attrs.event_mask = OS.GDK_KEY_PRESS_MASK | OS.GDK_KEY_RELEASE_MASK |
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144 OS.GDK_FOCUS_CHANGE_MASK | OS.GDK_POINTER_MOTION_MASK |
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145 OS.GDK_BUTTON_PRESS_MASK | OS.GDK_BUTTON_RELEASE_MASK |
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146 OS.GDK_ENTER_NOTIFY_MASK | OS.GDK_LEAVE_NOTIFY_MASK |
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147 OS.GDK_EXPOSURE_MASK | OS.GDK_VISIBILITY_NOTIFY_MASK |
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148 OS.GDK_POINTER_MOTION_HINT_MASK;
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149 attrs.window_type = OS.GDK_WINDOW_CHILD;
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150 attrs.visual = gdkvisual;
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151 glWindow = OS.gdk_window_new (window, &attrs, OS.GDK_WA_VISUAL);
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152 OS.gdk_window_set_user_data ( glWindow, cast(void*) handle);
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153 if ((style & DWT.NO_BACKGROUND) !is 0)
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154 OS.gdk_window_set_back_pixmap (window, null, false);
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155 xWindow = OS.gdk_x11_drawable_get_xid ( glWindow );
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156 OS.gdk_window_show (glWindow);
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157
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158 Listener listener = new class() Listener {
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159 public void handleEvent (Event event) {
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160 switch (event.type) {
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161 case DWT.Paint:
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162 /**
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163 * Bug in MESA. MESA does some nasty sort of polling to try
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164 * to ensure that their buffer sizes match the current X state.
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165 * This state can be updated using glViewport().
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166 * FIXME: There has to be a better way of doing this.
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167 */
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168 int[4] viewport;
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169 GLX.glGetIntegerv (GLX.GL_VIEWPORT, viewport);
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170 GLX.glViewport (viewport [0],viewport [1],viewport [2],viewport [3]);
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171 break;
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172 case DWT.Resize:
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173 Rectangle clientArea = getClientArea();
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174 OS.gdk_window_move (glWindow, clientArea.x, clientArea.y);
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175 OS.gdk_window_resize (glWindow, clientArea.width, clientArea.height);
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176 break;
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177 case DWT.Dispose:
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178 auto window = OS.GTK_WIDGET_WINDOW (handle);
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179 auto xDisplay = OS.gdk_x11_drawable_get_xdisplay (window);
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180 if (context !is null) {
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181 if (GLX.glXGetCurrentContext () is context) {
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182 GLX.glXMakeCurrent (xDisplay, 0, null);
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183 }
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184 GLX.glXDestroyContext (xDisplay, context);
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185 context = null;
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186 }
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187 if (glWindow !is null) {
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188 OS.gdk_window_destroy (glWindow);
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189 glWindow = null;
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190 }
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191 break;
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192 }
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193 }
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194 };
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195 addListener (DWT.Resize, listener);
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196 addListener (DWT.Paint, listener);
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197 addListener (DWT.Dispose, listener);
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198 }
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199
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200 /**
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201 * Returns a GLData object describing the created context.
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202 *
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203 * @return GLData description of the OpenGL context attributes
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204 * @exception DWTException <ul>
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205 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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206 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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207 * </ul>
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208 */
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209 public GLData getGLData () {
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210 checkWidget ();
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211 auto window = OS.GTK_WIDGET_WINDOW (handle);
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212 auto xDisplay = OS.gdk_x11_drawable_get_xdisplay (window);
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213 GLData data = new GLData ();
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214 int [1] value;
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215 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_DOUBLEBUFFER, value);
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216 data.doubleBuffer = value [0] !is 0;
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217 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_STEREO, value);
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218 data.stereo = value [0] !is 0;
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219 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_RED_SIZE, value);
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220 data.redSize = value [0];
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221 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_GREEN_SIZE, value);
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222 data.greenSize = value [0];
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223 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_BLUE_SIZE, value);
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224 data.blueSize = value [0];
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225 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_ALPHA_SIZE, value);
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226 data.alphaSize = value [0];
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227 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_DEPTH_SIZE, value);
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228 data.depthSize = value [0];
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229 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_STENCIL_SIZE, value);
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230 data.stencilSize = value [0];
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231 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_ACCUM_RED_SIZE, value);
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232 data.accumRedSize = value [0];
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233 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_ACCUM_GREEN_SIZE, value);
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234 data.accumGreenSize = value [0];
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235 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_ACCUM_BLUE_SIZE, value);
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236 data.accumBlueSize = value [0];
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237 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_ACCUM_ALPHA_SIZE, value);
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238 data.accumAlphaSize = value [0];
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239 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_SAMPLE_BUFFERS, value);
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240 data.sampleBuffers = value [0];
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241 GLX.glXGetConfig (xDisplay, &vinfo, GLX.GLX_SAMPLES, value);
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242 data.samples = value [0];
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243 return data;
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244 }
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245
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246 /**
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247 * Returns a bool indicating whether the receiver's OpenGL context
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248 * is the current context.
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249 *
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250 * @return true if the receiver holds the current OpenGL context,
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251 * false otherwise
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252 * @exception DWTException <ul>
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253 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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254 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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255 * </ul>
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256 */
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257 public bool isCurrent () {
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258 checkWidget ();
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259 return (GLX.glXGetCurrentContext () is context);
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260 }
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261
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262 /**
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263 * Sets the OpenGL context associated with this GLCanvas to be the
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264 * current GL context.
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265 *
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266 * @exception DWTException <ul>
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267 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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268 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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269 * </ul>
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270 */
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271 public void setCurrent () {
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272 checkWidget ();
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273 if (GLX.glXGetCurrentContext () is context) return;
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274 auto window = OS.GTK_WIDGET_WINDOW (handle);
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275 auto xDisplay = OS.gdk_x11_drawable_get_xdisplay (window);
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276 GLX.glXMakeCurrent (xDisplay, xWindow, context);
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277 }
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278
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279 /**
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280 * Swaps the front and back color buffers.
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281 *
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282 * @exception DWTException <ul>
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283 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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284 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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285 * </ul>
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286 */
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287 public void swapBuffers () {
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288 checkWidget ();
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289 auto window = OS.GTK_WIDGET_WINDOW (handle);
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290 auto xDisplay = OS.gdk_x11_drawable_get_xdisplay (window);
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291 GLX.glXSwapBuffers (xDisplay, xWindow);
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292 }
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293 }