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Diffstat (limited to 'engines/mohawk/myst_pict.cpp')
| -rw-r--r-- | engines/mohawk/myst_pict.cpp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/engines/mohawk/myst_pict.cpp b/engines/mohawk/myst_pict.cpp new file mode 100644 index 0000000000..117c5ec9cc --- /dev/null +++ b/engines/mohawk/myst_pict.cpp @@ -0,0 +1,247 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#include "common/system.h" + +#include "mohawk/myst_pict.h" + +namespace Mohawk { + +// The PICT code is based off of the QuickDraw specs: +// http://developer.apple.com/documentation/mac/QuickDraw/QuickDraw-461.html + +MystPICT::MystPICT(MystJPEG *jpegDecoder) { + _jpegDecoder = jpegDecoder; + _pixelFormat = g_system->getScreenFormat(); +} + +Graphics::Surface *MystPICT::decodeImage(Common::SeekableReadStream *stream) { + // Skip initial 512 bytes (all 0's) + stream->seek(512, SEEK_CUR); + + // Read in the first part of the header + /* uint16 fileSize = */ stream->readUint16BE(); + + _imageRect.top = stream->readUint16BE(); + _imageRect.left = stream->readUint16BE(); + _imageRect.bottom = stream->readUint16BE(); + _imageRect.right = stream->readUint16BE(); + _imageRect.debugPrint(0, "PICT Rect:"); + + Graphics::Surface *image = new Graphics::Surface(); + image->create(_imageRect.width(), _imageRect.height(), _pixelFormat.bytesPerPixel); + + // NOTE: This is only a subset of the full PICT format. + // - Only V2 Images Supported + // - JPEG Chunks are Supported + // - DirectBitsRect Chunks are Supported + for (uint32 opNum = 0; !stream->eos() && !stream->err() && stream->pos() < stream->size(); opNum++) { + uint16 opcode = stream->readUint16BE(); + debug(2, "Found PICT opcode %04x", opcode); + + if (opNum == 0 && opcode != 0x0011) + error ("Cannot find PICT version opcode"); + else if (opNum == 1 && opcode != 0x0C00) + error ("Cannot find PICT header opcode"); + + if (opcode == 0x0001) { // Clip + // Ignore + uint16 clipSize = stream->readUint16BE(); + stream->seek(clipSize - 2, SEEK_CUR); + } else if (opcode == 0x0007) { // PnSize + // Ignore + stream->readUint16BE(); + stream->readUint16BE(); + } else if (opcode == 0x0011) { // VersionOp + uint16 version = stream->readUint16BE(); + if (version != 0x02FF) + error ("Unknown PICT version"); + } else if (opcode == 0x001E) { // DefHilite + // Ignore, Contains no Data + } else if (opcode == 0x009A) { // DirectBitsRect + decodeDirectBitsRect(stream, image); + } else if (opcode == 0x00A1) { // LongComment + stream->readUint16BE(); + uint16 dataSize = stream->readUint16BE(); + stream->seek(dataSize, SEEK_CUR); + } else if (opcode == 0x00FF) { // OpEndPic + stream->readUint16BE(); + break; + } else if (opcode == 0x0C00) { // HeaderOp + /* uint16 version = */ stream->readUint16BE(); + stream->readUint16BE(); // Reserved + /* uint32 hRes = */ stream->readUint32BE(); + /* uint32 vRes = */ stream->readUint32BE(); + Common::Rect origResRect; + origResRect.top = stream->readUint16BE(); + origResRect.left = stream->readUint16BE(); + origResRect.bottom = stream->readUint16BE(); + origResRect.right = stream->readUint16BE(); + stream->readUint32BE(); // Reserved + } else if (opcode == 0x8200) { // CompressedQuickTime + decodeCompressedQuickTime(stream, image); + break; + } else { + error ("Unknown PICT opcode %04x", opcode); + } + } + + return image; +} + +struct DirectBitsRectData { + // PixMap + struct { + uint32 baseAddr; + uint16 rowBytes; + Common::Rect bounds; + uint16 pmVersion; + uint16 packType; + uint32 packSize; + uint32 hRes; + uint32 vRes; + uint16 pixelType; + uint16 pixelSize; + uint16 cmpCount; + uint16 cmpSize; + uint32 planeBytes; + uint32 pmTable; + uint32 pmReserved; + } pixMap; + Common::Rect srcRect; + Common::Rect dstRect; + uint16 mode; +}; + +void MystPICT::decodeDirectBitsRect(Common::SeekableReadStream *stream, Graphics::Surface *image) { + static const Graphics::PixelFormat directBitsFormat = Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0); + + Graphics::Surface buffer; + buffer.create(image->w, image->h, 2); + + DirectBitsRectData directBitsData; + + directBitsData.pixMap.baseAddr = stream->readUint32BE(); + directBitsData.pixMap.rowBytes = stream->readUint16BE(); + directBitsData.pixMap.bounds.top = stream->readUint16BE(); + directBitsData.pixMap.bounds.left = stream->readUint16BE(); + directBitsData.pixMap.bounds.bottom = stream->readUint16BE(); + directBitsData.pixMap.bounds.right = stream->readUint16BE(); + directBitsData.pixMap.pmVersion = stream->readUint16BE(); + directBitsData.pixMap.packType = stream->readUint16BE(); + directBitsData.pixMap.packSize = stream->readUint32BE(); + directBitsData.pixMap.hRes = stream->readUint32BE(); + directBitsData.pixMap.vRes = stream->readUint32BE(); + directBitsData.pixMap.pixelType = stream->readUint16BE(); + directBitsData.pixMap.pixelSize = stream->readUint16BE(); + directBitsData.pixMap.cmpCount = stream->readUint16BE(); + directBitsData.pixMap.cmpSize = stream->readUint16BE(); + directBitsData.pixMap.planeBytes = stream->readUint32BE(); + directBitsData.pixMap.pmTable = stream->readUint32BE(); + directBitsData.pixMap.pmReserved = stream->readUint32BE(); + directBitsData.srcRect.top = stream->readUint16BE(); + directBitsData.srcRect.left = stream->readUint16BE(); + directBitsData.srcRect.bottom = stream->readUint16BE(); + directBitsData.srcRect.right = stream->readUint16BE(); + directBitsData.dstRect.top = stream->readUint16BE(); + directBitsData.dstRect.left = stream->readUint16BE(); + directBitsData.dstRect.bottom = stream->readUint16BE(); + directBitsData.dstRect.right = stream->readUint16BE(); + directBitsData.mode = stream->readUint16BE(); + + if (directBitsData.pixMap.pixelSize != 16) + error("Unhandled directBitsRect bitsPerPixel %d", directBitsData.pixMap.pixelSize); + + // Read in amount of data per row + for (uint16 i = 0; i < directBitsData.pixMap.bounds.height(); i++) { + if (directBitsData.pixMap.packType == 1 || directBitsData.pixMap.rowBytes < 8) { // Unpacked, Pad-Byte + error("Pack Type = %d, Row Bytes = %d", directBitsData.pixMap.packType, directBitsData.pixMap.rowBytes); + // TODO + } else if (directBitsData.pixMap.packType == 2) { // Unpacked, No Pad-Byte + error("Pack Type = 2"); + // TODO + } else if (directBitsData.pixMap.packType > 2) { // Packed + uint16 byteCount = (directBitsData.pixMap.rowBytes > 250) ? stream->readUint16BE() : stream->readByte(); + decodeDirectBitsLine((byte *)buffer.getBasePtr(0, i), directBitsData.pixMap.rowBytes, stream->readStream(byteCount)); + } + } + + // Convert from 16-bit to whatever surface we need + for (uint16 y = 0; y < buffer.h; y++) { + for (uint16 x = 0; x < buffer.w; x++) { + byte r = 0, g = 0, b = 0; + uint16 color = READ_BE_UINT16(buffer.getBasePtr(x, y)); + directBitsFormat.colorToRGB(color, r, g, b); + *((uint16 *)image->getBasePtr(x, y)) = _pixelFormat.RGBToColor(r, g, b); + } + } +} + +void MystPICT::decodeDirectBitsLine(byte *out, uint32 length, Common::SeekableReadStream *data) { + uint32 dataDecoded = 0; + while (data->pos() < data->size() && dataDecoded < length) { + byte op = data->readByte(); + + if (op & 0x80) { + uint32 runSize = (op ^ 255) + 2; + byte value1 = data->readByte(); + byte value2 = data->readByte(); + for (uint32 i = 0; i < runSize; i++) { + *out++ = value1; + *out++ = value2; + } + dataDecoded += runSize * 2; + } else { + uint32 runSize = (op + 1) * 2; + for (uint32 i = 0; i < runSize; i++) + *out++ = data->readByte(); + dataDecoded += runSize; + } + } + + if (length != dataDecoded) + warning("Mismatched DirectBits read"); + delete data; +} + +// Compressed QuickTime details can be found here: +// http://developer.apple.com/documentation/QuickTime/Rm/CompressDecompress/ImageComprMgr/B-Chapter/2TheImageCompression.html +// http://developer.apple.com/documentation/QuickTime/Rm/CompressDecompress/ImageComprMgr/F-Chapter/6WorkingwiththeImage.html +// I'm just ignoring that because Myst ME uses none of that extra stuff. The offset is always the same. + +void MystPICT::decodeCompressedQuickTime(Common::SeekableReadStream *stream, Graphics::Surface *image) { + uint32 dataSize = stream->readUint32BE(); + uint32 startPos = stream->pos(); + + Graphics::Surface *jpegImage = _jpegDecoder->decodeImage(new Common::SeekableSubReadStream(stream, stream->pos() + 156, stream->pos() + dataSize)); + stream->seek(startPos + dataSize); + + image->copyFrom(*jpegImage); + + jpegImage->free(); + delete jpegImage; +} + +} // End of namespace Mohawk |