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view org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/internal/image/PngTrnsChunk.d @ 120:536e43f63c81
Comprehensive update for Win32/Linux32 dmd-2.053/dmd-1.068+Tango-r5661
===D2===
* added [Try]Immutable/Const/Shared templates to work with differenses in D1/D2 instead of version statements
used these templates to work with strict type storage rules of dmd-2.053
* com.ibm.icu now also compilable with D2, but not tested yet
* small fixes
Snippet288 - shared data is in TLS
===Phobos===
* fixed critical bugs in Phobos implemention
completely incorrect segfault prone fromStringz (Linux's port ruthless killer)
terrible, incorrect StringBuffer realization (StyledText killer)
* fixed small bugs as well
Snippet72 - misprint in the snippet
* implemented missed functionality for Phobos
ByteArrayOutputStream implemented (image loading available)
formatting correctly works for all DWT's cases
As a result, folowing snippets now works with Phobos (Snippet### - what is fixed):
Snippet24, 42, 111, 115, 130, 235, 276 - bad string formatting
Snippet48, 282 - crash on image loading
Snippet163, 189, 211, 213, 217, 218, 222 - crash on copy/cut in StyledText
Snippet244 - hang-up
===Tango===
* few changes for the latest Tango trunc-r5661
* few small performance improvments
===General===
* implMissing-s for only one version changed to implMissingInTango/InPhobos
* incorrect calls to Format in toString-s fixed
* fixed loading \uXXXX characters in ResourceBundle
* added good UTF-8 support for StyledText, TextLayout (Win32) and friends
UTF functions revised and tested. It is now in java.nonstandard.*Utf modules
StyledText and TextLayout (Win32) modules revised for UTF-8 support
* removed small diferences in most identical files in *.swt.* folders
*.swt.internal.image, *.swt.events and *.swt.custom are identical in Win32/Linux32
now 179 of 576 (~31%) files in *.swt.* folders are fully identical
* Win32: snippets now have right subsystem, pretty icons and native system style controls
* small fixes in snippets
Snippet44 - it's not Snippet44
Snippet212 - functions work with different images and offsets arrays
Win32: Snippet282 - crash on close if the button has an image
Snippet293 - setGrayed is commented
and others
Win32: As a result, folowing snippets now works
Snippet68 - color doesn't change
Snippet163, 189, 211, 213, 217, 218, 222 - UTF-8 issues (see above)
Snippet193 - no tabel headers
author | Denis Shelomovskij <verylonglogin.reg@gmail.com> |
---|---|
date | Sat, 09 Jul 2011 15:50:20 +0300 |
parents | f713da8bc051 |
children |
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/******************************************************************************* * Copyright (c) 2000, 2006 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 org.eclipse.swt.internal.image.PngTrnsChunk; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.PaletteData; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.internal.image.PngChunk; import org.eclipse.swt.internal.image.PNGFileFormat; import org.eclipse.swt.internal.image.PngFileReadState; import org.eclipse.swt.internal.image.PngIhdrChunk; import org.eclipse.swt.internal.image.PngPlteChunk; public class PngTrnsChunk : PngChunk { alias PngChunk.validate validate; static const int TRANSPARENCY_TYPE_PIXEL = 0; static const int TRANSPARENCY_TYPE_ALPHAS = 1; static const int RGB_DATA_LENGTH = 6; this(RGB rgb) { super(RGB_DATA_LENGTH); setType(TYPE_tRNS); setInt16(DATA_OFFSET, rgb.red); setInt16(DATA_OFFSET + 2, rgb.green); setInt16(DATA_OFFSET + 4, rgb.blue); setCRC(computeCRC()); } this(byte[] reference){ super(reference); } override int getChunkType() { return CHUNK_tRNS; } void validateLength(PngIhdrChunk header, PngPlteChunk paletteChunk) { bool valid; switch (header.getColorType()) { case PngIhdrChunk.COLOR_TYPE_RGB: // Three 2-byte values (RGB) valid = getLength() is 6; break; case PngIhdrChunk.COLOR_TYPE_PALETTE: // Three 2-byte values (RGB) valid = getLength() <= paletteChunk.getLength(); break; case PngIhdrChunk.COLOR_TYPE_GRAYSCALE: // One 2-byte value valid = getLength() is 2; break; // Cannot use both Alpha and tRNS case PngIhdrChunk.COLOR_TYPE_RGB_WITH_ALPHA: case PngIhdrChunk.COLOR_TYPE_GRAYSCALE_WITH_ALPHA: default: valid = false; } if (!valid) { SWT.error(SWT.ERROR_INVALID_IMAGE); } } /** * Answer whether the chunk is a valid tRNS chunk. */ void validate(PngFileReadState readState, PngIhdrChunk headerChunk, PngPlteChunk paletteChunk) { if (!readState.readIHDR || (headerChunk.getMustHavePalette() && !readState.readPLTE) || readState.readIDAT || readState.readIEND) { SWT.error(SWT.ERROR_INVALID_IMAGE); } else { readState.readTRNS = true; } validateLength(headerChunk, paletteChunk); super.validate(readState, headerChunk); } int getTransparencyType(PngIhdrChunk header) { if (header.getColorType() is PngIhdrChunk.COLOR_TYPE_PALETTE) { return TRANSPARENCY_TYPE_ALPHAS; } return TRANSPARENCY_TYPE_PIXEL; } /** * Answer the transparent pixel RGB value. * This is not valid for palette color types. * This is not valid for alpha color types. * This will convert a grayscale value into * a palette index. * It will compress a 6 byte RGB into a 3 byte * RGB. */ int getSwtTransparentPixel(PngIhdrChunk header) { switch (header.getColorType()) { case PngIhdrChunk.COLOR_TYPE_GRAYSCALE: int gray = ((reference[DATA_OFFSET] & 0xFF) << 8) + (reference[DATA_OFFSET + 1] & 0xFF); if (header.getBitDepth() > 8) { return PNGFileFormat.compress16BitDepthTo8BitDepth(gray); } return gray & 0xFF; case PngIhdrChunk.COLOR_TYPE_RGB: int red = ((reference[DATA_OFFSET] & 0xFF) << 8) | (reference[DATA_OFFSET + 1] & 0xFF); int green = ((reference[DATA_OFFSET + 2] & 0xFF) << 8) | (reference[DATA_OFFSET + 3] & 0xFF); int blue = ((reference[DATA_OFFSET + 4] & 0xFF) << 8) | (reference[DATA_OFFSET + 5] & 0xFF); if (header.getBitDepth() > 8) { red = PNGFileFormat.compress16BitDepthTo8BitDepth(red); green = PNGFileFormat.compress16BitDepthTo8BitDepth(green); blue = PNGFileFormat.compress16BitDepthTo8BitDepth(blue); } return (red << 16) | (green << 8) | blue; default: SWT.error(SWT.ERROR_INVALID_IMAGE); return -1; } } /** * Answer an array of Alpha values that correspond to the * colors in the palette. * This is only valid for the COLOR_TYPE_PALETTE color type. */ byte[] getAlphaValues(PngIhdrChunk header, PngPlteChunk paletteChunk) { if (header.getColorType() !is PngIhdrChunk.COLOR_TYPE_PALETTE) { SWT.error(SWT.ERROR_INVALID_IMAGE); } byte[] alphas = new byte[paletteChunk.getPaletteSize()]; int dataLength = getLength(); int i = 0; for (i = 0; i < dataLength; i++) { alphas[i] = reference[DATA_OFFSET + i]; } /** * Any palette entries which do not have a corresponding * alpha value in the tRNS chunk are spec'd to have an * alpha of 255. */ for (int j = i; j < alphas.length; j++) { alphas[j] = cast(byte) 255; } return alphas; } }