1 /*
2 * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
634 cs.write(metadata.tRNS_alpha);
635 } else if (colorType == PNGImageReader.PNG_COLOR_GRAY) {
636 cs.writeShort(metadata.tRNS_gray);
637 } else if (colorType == PNGImageReader.PNG_COLOR_RGB) {
638 cs.writeShort(chunkRed);
639 cs.writeShort(chunkGreen);
640 cs.writeShort(chunkBlue);
641 } else {
642 throw new IIOException("tRNS chunk for color type 4 or 6!");
643 }
644 cs.finish();
645 }
646 }
647
648 private void write_bKGD() throws IOException {
649 if (metadata.bKGD_present) {
650 ChunkStream cs = new ChunkStream(PNGImageReader.bKGD_TYPE, stream);
651 int colorType = metadata.IHDR_colorType & 0x3;
652 int chunkType = metadata.bKGD_colorType;
653
654 // Special case: image is RGB(A) and chunk is Gray
655 // Promote chunk contents to RGB
656 int chunkRed = metadata.bKGD_red;
657 int chunkGreen = metadata.bKGD_red;
658 int chunkBlue = metadata.bKGD_red;
659 if (colorType == PNGImageReader.PNG_COLOR_RGB &&
660 chunkType == PNGImageReader.PNG_COLOR_GRAY) {
661 // Make a gray bKGD chunk look like RGB
662 chunkType = colorType;
663 chunkRed = chunkGreen = chunkBlue =
664 metadata.bKGD_gray;
665 }
666
667 // Ignore status of alpha in colorType
668 if (chunkType != colorType) {
669 processWarningOccurred(0,
670 "bKGD metadata has incompatible color type.\n" +
671 "The chunk will not be written.");
672 return;
673 }
674
675 if (colorType == PNGImageReader.PNG_COLOR_PALETTE) {
676 cs.writeByte(metadata.bKGD_index);
677 } else if (colorType == PNGImageReader.PNG_COLOR_GRAY ||
678 colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA) {
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1 /*
2 * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
634 cs.write(metadata.tRNS_alpha);
635 } else if (colorType == PNGImageReader.PNG_COLOR_GRAY) {
636 cs.writeShort(metadata.tRNS_gray);
637 } else if (colorType == PNGImageReader.PNG_COLOR_RGB) {
638 cs.writeShort(chunkRed);
639 cs.writeShort(chunkGreen);
640 cs.writeShort(chunkBlue);
641 } else {
642 throw new IIOException("tRNS chunk for color type 4 or 6!");
643 }
644 cs.finish();
645 }
646 }
647
648 private void write_bKGD() throws IOException {
649 if (metadata.bKGD_present) {
650 ChunkStream cs = new ChunkStream(PNGImageReader.bKGD_TYPE, stream);
651 int colorType = metadata.IHDR_colorType & 0x3;
652 int chunkType = metadata.bKGD_colorType;
653
654 int chunkRed = metadata.bKGD_red;
655 int chunkGreen = metadata.bKGD_green;
656 int chunkBlue = metadata.bKGD_blue;
657 // Special case: image is RGB(A) and chunk is Gray
658 // Promote chunk contents to RGB
659 if (colorType == PNGImageReader.PNG_COLOR_RGB &&
660 chunkType == PNGImageReader.PNG_COLOR_GRAY) {
661 // Make a gray bKGD chunk look like RGB
662 chunkType = colorType;
663 chunkRed = chunkGreen = chunkBlue =
664 metadata.bKGD_gray;
665 }
666
667 // Ignore status of alpha in colorType
668 if (chunkType != colorType) {
669 processWarningOccurred(0,
670 "bKGD metadata has incompatible color type.\n" +
671 "The chunk will not be written.");
672 return;
673 }
674
675 if (colorType == PNGImageReader.PNG_COLOR_PALETTE) {
676 cs.writeByte(metadata.bKGD_index);
677 } else if (colorType == PNGImageReader.PNG_COLOR_GRAY ||
678 colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA) {
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