batik-codec/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGImageDecoder.java [1052:1221]: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - properties.put("background_color", new Color(r, g, b)); } } private void parse_cHRM_chunk(PNGChunk chunk) { // If an sRGB chunk exists, ignore cHRM chunks if (sRGBRenderingIntent != -1) { return; } chromaticity = new float[8]; chromaticity[0] = chunk.getInt4(0)/100000.0F; chromaticity[1] = chunk.getInt4(4)/100000.0F; chromaticity[2] = chunk.getInt4(8)/100000.0F; chromaticity[3] = chunk.getInt4(12)/100000.0F; chromaticity[4] = chunk.getInt4(16)/100000.0F; chromaticity[5] = chunk.getInt4(20)/100000.0F; chromaticity[6] = chunk.getInt4(24)/100000.0F; chromaticity[7] = chunk.getInt4(28)/100000.0F; if (encodeParam != null) { encodeParam.setChromaticity(chromaticity); } if (emitProperties) { properties.put("white_point_x", chromaticity[0]); properties.put("white_point_y", chromaticity[1]); properties.put("red_x", chromaticity[2]); properties.put("red_y", chromaticity[3]); properties.put("green_x", chromaticity[4]); properties.put("green_y", chromaticity[5]); properties.put("blue_x", chromaticity[6]); properties.put("blue_y", chromaticity[7]); } } private void parse_gAMA_chunk(PNGChunk chunk) { // If an sRGB chunk exists, ignore gAMA chunks if (sRGBRenderingIntent != -1) { return; } fileGamma = chunk.getInt4(0)/100000.0F; float exp = performGammaCorrection ? displayExponent/userExponent : 1.0F; if (encodeParam != null) { encodeParam.setGamma(fileGamma*exp); } if (emitProperties) { properties.put("gamma", fileGamma * exp); } } private void parse_hIST_chunk(PNGChunk chunk) { if (redPalette == null) { String msg = PropertyUtil.getString("PNGImageDecoder18"); throw new RuntimeException(msg); } int length = redPalette.length; int[] hist = new int[length]; for (int i = 0; i < length; i++) { hist[i] = chunk.getInt2(2*i); } if (encodeParam != null) { encodeParam.setPaletteHistogram(hist); } } private void parse_iCCP_chunk(PNGChunk chunk) { String name = ""; // todo simplify this byte b; int textIndex = 0; while ((b = chunk.getByte(textIndex++)) != 0) { name += (char)b; } } private void parse_pHYs_chunk(PNGChunk chunk) { int xPixelsPerUnit = chunk.getInt4(0); int yPixelsPerUnit = chunk.getInt4(4); int unitSpecifier = chunk.getInt1(8); if (encodeParam != null) { encodeParam.setPhysicalDimension(xPixelsPerUnit, yPixelsPerUnit, unitSpecifier); } if (emitProperties) { properties.put("x_pixels_per_unit", xPixelsPerUnit); properties.put("y_pixels_per_unit", yPixelsPerUnit); properties.put("pixel_aspect_ratio", (float) xPixelsPerUnit / yPixelsPerUnit); if (unitSpecifier == 1) { properties.put("pixel_units", "Meters"); } else if (unitSpecifier != 0) { // Error -- unit specifier must be 0 or 1 String msg = PropertyUtil.getString("PNGImageDecoder12"); throw new RuntimeException(msg); } } } private void parse_sBIT_chunk(PNGChunk chunk) { if (colorType == PNG_COLOR_PALETTE) { significantBits = new int[3]; } else { significantBits = new int[inputBands]; } for (int i = 0; i < significantBits.length; i++) { int bits = chunk.getByte(i); int depth = (colorType == PNG_COLOR_PALETTE) ? 8 : bitDepth; if (bits <= 0 || bits > depth) { // Error -- significant bits must be between 0 and // image bit depth. String msg = PropertyUtil.getString("PNGImageDecoder13"); throw new RuntimeException(msg); } significantBits[i] = bits; } if (encodeParam != null) { encodeParam.setSignificantBits(significantBits); } if (emitProperties) { properties.put("significant_bits", significantBits); } } private void parse_sRGB_chunk(PNGChunk chunk) { sRGBRenderingIntent = chunk.getByte(0); // The presence of an sRGB chunk implies particular // settings for gamma and chroma. fileGamma = 45455/100000.0F; chromaticity = new float[8]; chromaticity[0] = 31270/10000.0F; chromaticity[1] = 32900/10000.0F; chromaticity[2] = 64000/10000.0F; chromaticity[3] = 33000/10000.0F; chromaticity[4] = 30000/10000.0F; chromaticity[5] = 60000/10000.0F; chromaticity[6] = 15000/10000.0F; chromaticity[7] = 6000/10000.0F; if (performGammaCorrection) { // File gamma is 1/2.2 float gamma = fileGamma*(displayExponent/userExponent); if (encodeParam != null) { encodeParam.setGamma(gamma); encodeParam.setChromaticity(chromaticity); } if (emitProperties) { properties.put("gamma", gamma); properties.put("white_point_x", chromaticity[0]); properties.put("white_point_y", chromaticity[1]); properties.put("red_x", chromaticity[2]); properties.put("red_y", chromaticity[3]); properties.put("green_x", chromaticity[4]); properties.put("green_y", chromaticity[5]); properties.put("blue_x", chromaticity[6]); properties.put("blue_y", chromaticity[7]); } } } private void parse_tEXt_chunk(PNGChunk chunk) { - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - batik-codec/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGRed.java [1063:1232]: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - properties.put("background_color", new Color(r, g, b)); } } private void parse_cHRM_chunk(PNGChunk chunk) { // If an sRGB chunk exists, ignore cHRM chunks if (sRGBRenderingIntent != -1) { return; } chromaticity = new float[8]; chromaticity[0] = chunk.getInt4(0)/100000.0F; chromaticity[1] = chunk.getInt4(4)/100000.0F; chromaticity[2] = chunk.getInt4(8)/100000.0F; chromaticity[3] = chunk.getInt4(12)/100000.0F; chromaticity[4] = chunk.getInt4(16)/100000.0F; chromaticity[5] = chunk.getInt4(20)/100000.0F; chromaticity[6] = chunk.getInt4(24)/100000.0F; chromaticity[7] = chunk.getInt4(28)/100000.0F; if (encodeParam != null) { encodeParam.setChromaticity(chromaticity); } if (emitProperties) { properties.put("white_point_x", chromaticity[0]); properties.put("white_point_y", chromaticity[1]); properties.put("red_x", chromaticity[2]); properties.put("red_y", chromaticity[3]); properties.put("green_x", chromaticity[4]); properties.put("green_y", chromaticity[5]); properties.put("blue_x", chromaticity[6]); properties.put("blue_y", chromaticity[7]); } } private void parse_gAMA_chunk(PNGChunk chunk) { // If an sRGB chunk exists, ignore gAMA chunks if (sRGBRenderingIntent != -1) { return; } fileGamma = chunk.getInt4(0)/100000.0F; // System.out.println("Gamma: " + fileGamma); float exp = performGammaCorrection ? displayExponent/userExponent : 1.0F; if (encodeParam != null) { encodeParam.setGamma(fileGamma*exp); } if (emitProperties) { properties.put("gamma", fileGamma * exp); } } private void parse_hIST_chunk(PNGChunk chunk) { if (redPalette == null) { String msg = PropertyUtil.getString("PNGImageDecoder18"); throw new RuntimeException(msg); } int length = redPalette.length; int[] hist = new int[length]; for (int i = 0; i < length; i++) { hist[i] = chunk.getInt2(2*i); } if (encodeParam != null) { encodeParam.setPaletteHistogram(hist); } } private void parse_iCCP_chunk(PNGChunk chunk) { String name = ""; byte b; int textIndex = 0; while ((b = chunk.getByte(textIndex++)) != 0) { name += (char)b; } } private void parse_pHYs_chunk(PNGChunk chunk) { int xPixelsPerUnit = chunk.getInt4(0); int yPixelsPerUnit = chunk.getInt4(4); int unitSpecifier = chunk.getInt1(8); if (encodeParam != null) { encodeParam.setPhysicalDimension(xPixelsPerUnit, yPixelsPerUnit, unitSpecifier); } if (emitProperties) { properties.put("x_pixels_per_unit", xPixelsPerUnit); properties.put("y_pixels_per_unit", yPixelsPerUnit); properties.put("pixel_aspect_ratio", (float) xPixelsPerUnit / yPixelsPerUnit); if (unitSpecifier == 1) { properties.put("pixel_units", "Meters"); } else if (unitSpecifier != 0) { // Error -- unit specifier must be 0 or 1 String msg = PropertyUtil.getString("PNGImageDecoder12"); throw new RuntimeException(msg); } } } private void parse_sBIT_chunk(PNGChunk chunk) { if (colorType == PNG_COLOR_PALETTE) { significantBits = new int[3]; } else { significantBits = new int[inputBands]; } for (int i = 0; i < significantBits.length; i++) { int bits = chunk.getByte(i); int depth = (colorType == PNG_COLOR_PALETTE) ? 8 : bitDepth; if (bits <= 0 || bits > depth) { // Error -- significant bits must be between 0 and // image bit depth. String msg = PropertyUtil.getString("PNGImageDecoder13"); throw new RuntimeException(msg); } significantBits[i] = bits; } if (encodeParam != null) { encodeParam.setSignificantBits(significantBits); } if (emitProperties) { properties.put("significant_bits", significantBits); } } private void parse_sRGB_chunk(PNGChunk chunk) { sRGBRenderingIntent = chunk.getByte(0); // The presence of an sRGB chunk implies particular // settings for gamma and chroma. fileGamma = 45455/100000.0F; chromaticity = new float[8]; chromaticity[0] = 31270/10000.0F; chromaticity[1] = 32900/10000.0F; chromaticity[2] = 64000/10000.0F; chromaticity[3] = 33000/10000.0F; chromaticity[4] = 30000/10000.0F; chromaticity[5] = 60000/10000.0F; chromaticity[6] = 15000/10000.0F; chromaticity[7] = 6000/10000.0F; if (performGammaCorrection) { // File gamma is 1/2.2 float gamma = fileGamma*(displayExponent/userExponent); if (encodeParam != null) { encodeParam.setGamma(gamma); encodeParam.setChromaticity(chromaticity); } if (emitProperties) { properties.put("gamma", gamma); properties.put("white_point_x", chromaticity[0]); properties.put("white_point_y", chromaticity[1]); properties.put("red_x", chromaticity[2]); properties.put("red_y", chromaticity[3]); properties.put("green_x", chromaticity[4]); properties.put("green_y", chromaticity[5]); properties.put("blue_x", chromaticity[6]); properties.put("blue_y", chromaticity[7]); } } } private void parse_tEXt_chunk(PNGChunk chunk) { - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -