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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.
*
* $URL$
* $Id$
*
*/
#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
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