1 files changed, 0 insertions, 133 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngTrnsChunk.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngTrnsChunk.java
deleted file mode 100755
index e65f28e4d9..0000000000
--- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngTrnsChunk.java
+++ /dev/null
@@ -1,133 +0,0 @@
-package org.eclipse.swt.internal.image;
-
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved
- */
-
-import org.eclipse.swt.*;
-
-public class PngTrnsChunk extends PngChunk {
-	static final int TRANSPARENCY_TYPE_PIXEL = 0;
-	static final int TRANSPARENCY_TYPE_ALPHAS = 1;
-	
-PngTrnsChunk(byte[] reference){
-	super(reference);
-}
-
-void validateLength(PngIhdrChunk header, PngPlteChunk paletteChunk) {
-	boolean valid;
-	switch (header.getColorType()) {
-		case PngIhdrChunk.COLOR_TYPE_RGB:
-			// Three 2-byte values (RGB)
-			valid = getLength() == 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() == 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() == 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() != 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] = (byte) 255;
-	}
-	return alphas;
-}
-}