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-rw-r--r--graphics/decoders/tga.cpp429
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diff --git a/graphics/decoders/tga.cpp b/graphics/decoders/tga.cpp
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index bc27f18a49..0000000000
--- a/graphics/decoders/tga.cpp
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-/* ScummVM - Graphic Adventure Engine
- *
- * ScummVM is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-/* Based on code from xoreos https://github.com/DrMcCoy/xoreos/
- * relicensed under GPLv2+ with permission from DrMcCoy and clone2727
- */
-
-#include "common/util.h"
-#include "common/stream.h"
-#include "common/textconsole.h"
-#include "common/error.h"
-
-#include "graphics/decoders/tga.h"
-
-namespace Graphics {
-
-TGADecoder::TGADecoder() {
- _colorMapSize = 0;
- _colorMapOrigin = 0;
- _colorMapLength = 0;
- _colorMapEntryLength = 0;
- _colorMap = NULL;
-}
-
-TGADecoder::~TGADecoder() {
- destroy();
-}
-
-void TGADecoder::destroy() {
- _surface.free();
- delete[] _colorMap;
-}
-
-bool TGADecoder::loadStream(Common::SeekableReadStream &tga) {
- destroy();
-
- byte imageType, pixelDepth;
- bool success;
- success = readHeader(tga, imageType, pixelDepth);
- if (success) {
- switch (imageType) {
- case TYPE_BW:
- case TYPE_TRUECOLOR:
- success = readData(tga, imageType, pixelDepth);
- break;
- case TYPE_RLE_BW:
- case TYPE_RLE_TRUECOLOR:
- case TYPE_RLE_CMAP:
- success = readDataRLE(tga, imageType, pixelDepth);
- break;
- case TYPE_CMAP:
- success = readDataColorMapped(tga, imageType, pixelDepth);
- break;
- default:
- success = false;
- break;
- }
- }
- if (tga.err() || !success) {
- warning("Failed reading TGA-file");
- return false;
- }
- return success;
-}
-
-bool TGADecoder::readHeader(Common::SeekableReadStream &tga, byte &imageType, byte &pixelDepth) {
- if (!tga.seek(0)) {
- warning("Failed reading TGA-file");
- return false;
- }
-
- // TGAs have an optional "id" string in the header
- uint32 idLength = tga.readByte();
-
- // Number of colors in the color map / palette
- int hasColorMap = tga.readByte();
-
- // Image type. See header for numeric constants
- imageType = tga.readByte();
-
- switch (imageType) {
- case TYPE_CMAP:
- case TYPE_TRUECOLOR:
- case TYPE_BW:
- case TYPE_RLE_CMAP:
- case TYPE_RLE_TRUECOLOR:
- case TYPE_RLE_BW:
- break;
- default:
- warning("Unsupported image type: %d", imageType);
- return false;
- }
-
- // Color map specifications
- if (hasColorMap == 0) {
- tga.skip(5);
- } else {
- _colorMapOrigin = tga.readUint16LE();
- _colorMapLength = tga.readUint16LE();
- _colorMapEntryLength = tga.readByte();
- }
- // Origin-defintions
- tga.skip(2 + 2);
-
- // Image dimensions
- _surface.w = tga.readUint16LE();
- _surface.h = tga.readUint16LE();
-
- // Bits per pixel
- pixelDepth = tga.readByte();
- _surface.format.bytesPerPixel = pixelDepth / 8;
-
- // Image descriptor
- byte imgDesc = tga.readByte();
- int attributeBits = imgDesc & 0x0F;
- assert((imgDesc & 0x10) == 0);
- _originTop = (imgDesc & 0x20);
-
- // Interleaving is not handled at this point
- //int interleave = (imgDesc & 0xC);
- if (imageType == TYPE_CMAP || imageType == TYPE_RLE_CMAP) {
- if (pixelDepth == 8) {
- _format = PixelFormat::createFormatCLUT8();
- } else {
- warning("Unsupported index-depth: %d", pixelDepth);
- return false;
- }
- } else if (imageType == TYPE_TRUECOLOR || imageType == TYPE_RLE_TRUECOLOR) {
- if (pixelDepth == 24) {
- _format = PixelFormat(3, 8, 8, 8, 0, 16, 8, 0, 0);
- } else if (pixelDepth == 32) {
- // HACK: According to the spec, attributeBits should determine the amount
- // of alpha-bits, however, as the game files that use this decoder seems
- // to ignore that fact, we force the amount to 8 for 32bpp files for now.
- _format = PixelFormat(4, 8, 8, 8, /* attributeBits */ 8, 16, 8, 0, 24);
- } else if (pixelDepth == 16 && imageType == TYPE_TRUECOLOR) {
- // 16bpp TGA is ARGB1555
- _format = PixelFormat(2, 5, 5, 5, attributeBits, 10, 5, 0, 15);
- } else {
- warning("Unsupported pixel depth: %d, %d", imageType, pixelDepth);
- return false;
- }
- } else if (imageType == TYPE_BW || TYPE_RLE_BW) {
- if (pixelDepth == 8) {
- _format = PixelFormat(4, 8, 8, 8, 0, 16, 8, 0, 0);
- } else {
- warning("Unsupported pixel depth: %d, %d", imageType, pixelDepth);
- return false;
- }
-
- } else {
- warning("Unsupported image type: %d", imageType);
- return false;
- }
-
- // Skip the id string
- tga.skip(idLength);
-
- if (hasColorMap) {
- return readColorMap(tga, imageType, pixelDepth);
- }
- return true;
-}
-
-bool TGADecoder::readColorMap(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth) {
- _colorMap = new byte[3 * _colorMapLength];
- for (int i = 0; i < _colorMapLength * 3; i += 3) {
- byte r, g, b;
- if (_colorMapEntryLength == 32) {
- byte a;
- PixelFormat format(4, 8, 8, 8, 0, 16, 8, 0, 24);
- uint32 color = tga.readUint32LE();
- format.colorToARGB(color, a, r, g, b);
- } else if (_colorMapEntryLength == 24) {
- r = tga.readByte();
- g = tga.readByte();
- b = tga.readByte();
- } else if (_colorMapEntryLength == 16) {
- byte a;
- PixelFormat format(2, 5, 5, 5, 0, 10, 5, 0, 15);
- uint16 color = tga.readUint16LE();
- format.colorToARGB(color, a, r, g, b);
- } else {
- warning("Unsupported image type: %d", imageType);
- r = g = b = 0;
- }
-#ifdef SCUMM_LITTLE_ENDIAN
- _colorMap[i] = r;
- _colorMap[i + 1] = g;
- _colorMap[i + 2] = b;
-#else
- _colorMap[i] = b;
- _colorMap[i + 1] = g;
- _colorMap[i + 2] = r;
-#endif
- }
- return true;
-}
-
-// Additional information found from http://paulbourke.net/dataformats/tga/
-// With some details from the link referenced in the header.
-bool TGADecoder::readData(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth) {
- // TrueColor
- if (imageType == TYPE_TRUECOLOR) {
- _surface.create(_surface.w, _surface.h, _format);
-
- if (pixelDepth == 16) {
- for (int i = 0; i < _surface.h; i++) {
- uint16 *dst;
- if (!_originTop) {
- dst = (uint16 *)_surface.getBasePtr(0, _surface.h - i - 1);
- } else {
- dst = (uint16 *)_surface.getBasePtr(0, i);
- }
- for (int j = 0; j < _surface.w; j++) {
- *dst++ = tga.readUint16LE();
- }
- }
- } else if (pixelDepth == 32) {
- for (int i = 0; i < _surface.h; i++) {
- uint32 *dst;
- if (!_originTop) {
- dst = (uint32 *)_surface.getBasePtr(0, _surface.h - i - 1);
- } else {
- dst = (uint32 *)_surface.getBasePtr(0, i);
- }
- for (int j = 0; j < _surface.w; j++) {
- *dst++ = tga.readUint32LE();
- }
- }
- } else if (pixelDepth == 24) {
- for (int i = 0; i < _surface.h; i++) {
- byte *dst;
- if (!_originTop) {
- dst = (byte *)_surface.getBasePtr(0, _surface.h - i - 1);
- } else {
- dst = (byte *)_surface.getBasePtr(0, i);
- }
- for (int j = 0; j < _surface.w; j++) {
- byte r = tga.readByte();
- byte g = tga.readByte();
- byte b = tga.readByte();
-#ifdef SCUMM_LITTLE_ENDIAN
- *dst++ = r;
- *dst++ = g;
- *dst++ = b;
-#else
- *dst++ = b;
- *dst++ = g;
- *dst++ = r;
-#endif
- }
- }
- }
- // Black/White
- } else if (imageType == TYPE_BW) {
- _surface.create(_surface.w, _surface.h, _format);
-
- byte *data = (byte *)_surface.getPixels();
- uint32 count = _surface.w * _surface.h;
-
- while (count-- > 0) {
- byte g = tga.readByte();
- *data++ = g;
- *data++ = g;
- *data++ = g;
- *data++ = g;
- }
- }
- return true;
-}
-
-bool TGADecoder::readDataColorMapped(Common::SeekableReadStream &tga, byte imageType, byte indexDepth) {
- // Color-mapped
- if (imageType == TYPE_CMAP) {
- _surface.create(_surface.w, _surface.h, _format);
- if (indexDepth == 8) {
- for (int i = 0; i < _surface.h; i++) {
- byte *dst;
- if (!_originTop) {
- dst = (byte *)_surface.getBasePtr(0, _surface.h - i - 1);
- } else {
- dst = (byte *)_surface.getBasePtr(0, i);
- }
- for (int j = 0; j < _surface.w; j++) {
- byte index = tga.readByte();
- *dst++ = index;
- }
- }
- } else if (indexDepth == 16) {
- warning("16 bit indexes not supported");
- return false;
- }
- } else {
- return false;
- }
- return true;
-}
-
-bool TGADecoder::readDataRLE(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth) {
- // RLE-TrueColor / RLE-Black/White
- if (imageType == TYPE_RLE_TRUECOLOR || imageType == TYPE_RLE_BW || imageType == TYPE_RLE_CMAP) {
- _surface.create(_surface.w, _surface.h, _format);
- uint32 count = _surface.w * _surface.h;
- byte *data = (byte *)_surface.getPixels();
-
- while (count > 0) {
- uint32 header = tga.readByte();
- byte type = (header & 0x80) >> 7;
- uint32 rleCount = (header & 0x7F) + 1;
-
- // RLE-packet
- if (type == 1) {
- if (pixelDepth == 32 && imageType == TYPE_RLE_TRUECOLOR) {
- uint32 color = tga.readUint32LE();
- while (rleCount-- > 0) {
- *((uint32 *)data) = color;
- data += 4;
- count--;
- }
- } else if (pixelDepth == 24 && imageType == TYPE_RLE_TRUECOLOR) {
- byte r = tga.readByte();
- byte g = tga.readByte();
- byte b = tga.readByte();
- while (rleCount-- > 0) {
-#ifdef SCUMM_LITTLE_ENDIAN
- *data++ = r;
- *data++ = g;
- *data++ = b;
-#else
- *data++ = b;
- *data++ = g;
- *data++ = r;
-#endif
- count--;
- }
- } else if (pixelDepth == 8 && imageType == TYPE_RLE_BW) {
- byte color = tga.readByte();
- while (rleCount-- > 0) {
- *data++ = color;
- *data++ = color;
- *data++ = color;
- *data++ = color;
- count--;
- }
- } else if (pixelDepth == 8 && imageType == TYPE_RLE_CMAP) {
- byte index = tga.readByte();
- while (rleCount-- > 0) {
- *data++ = index;
- count--;
- }
- } else {
- warning("Unhandled pixel-depth for image-type 10");
- return false;
- }
- // Raw-packet
- } else if (type == 0) {
- if (pixelDepth == 32 && imageType == TYPE_RLE_TRUECOLOR) {
- while (rleCount-- > 0) {
- uint32 color = tga.readUint32LE();
- *((uint32 *)data) = color;
- data += 4;
- count--;
- }
- } else if (pixelDepth == 24 && imageType == TYPE_RLE_TRUECOLOR) {
- while (rleCount-- > 0) {
- byte r = tga.readByte();
- byte g = tga.readByte();
- byte b = tga.readByte();
-#ifdef SCUMM_LITTLE_ENDIAN
- *data++ = r;
- *data++ = g;
- *data++ = b;
-#else
- *data++ = b;
- *data++ = g;
- *data++ = r;
-#endif
- count--;
- }
- } else if (pixelDepth == 8 && imageType == TYPE_RLE_BW) {
- while (rleCount-- > 0) {
- byte color = tga.readByte();
- *data++ = color;
- *data++ = color;
- *data++ = color;
- *data++ = color;
- count--;
- }
- } else if (pixelDepth == 8 && imageType == TYPE_RLE_CMAP) {
- while (rleCount-- > 0) {
- byte index = tga.readByte();
- *data++ = index;
- count--;
- }
- } else {
- warning("Unhandled pixel-depth for image-type 10");
- return false;
- }
- } else {
- warning("Unknown header for RLE-packet %d", type);
- return false;
- }
- }
- } else {
- return false;
- }
- return true;
-}
-
-} // End of namespace Graphics
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