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https://github.com/libretro/scummvm.git
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344 lines
12 KiB
C++
344 lines
12 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/substream.h"
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#include "graphics/conversion.h"
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#include "graphics/jpeg.h"
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#include "graphics/pict.h"
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#include "graphics/surface.h"
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namespace Graphics {
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// The PICT code is based off of the QuickDraw specs:
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// http://developer.apple.com/legacy/mac/library/documentation/mac/QuickDraw/QuickDraw-461.html
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// http://developer.apple.com/legacy/mac/library/documentation/mac/QuickDraw/QuickDraw-269.html
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PictDecoder::PictDecoder(PixelFormat pixelFormat) {
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_jpeg = new JPEG();
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_pixelFormat = pixelFormat;
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}
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PictDecoder::~PictDecoder() {
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delete _jpeg;
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}
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Surface *PictDecoder::decodeImage(Common::SeekableReadStream *stream, byte *palette) {
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assert(stream);
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_outputSurface = 0;
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uint16 fileSize = stream->readUint16BE();
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// If we have no file size here, we probably have a PICT from a file
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// and not a resource. The other two bytes are the fileSize which we
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// don't actually need (and already read if from a resource).
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if (!fileSize)
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stream->seek(512 + 2);
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_imageRect.top = stream->readUint16BE();
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_imageRect.left = stream->readUint16BE();
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_imageRect.bottom = stream->readUint16BE();
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_imageRect.right = stream->readUint16BE();
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_imageRect.debugPrint(0, "PICT Rect:");
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_isPaletted = false;
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// NOTE: This is only a subset of the full PICT format.
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// - Only V2 Images Supported
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// - CompressedQuickTime (JPEG) compressed data is supported
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// - DirectBitsRect/PackBitsRect compressed data is supported
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for (uint32 opNum = 0; !stream->eos() && !stream->err() && stream->pos() < stream->size(); opNum++) {
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uint16 opcode = stream->readUint16BE();
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debug(2, "Found PICT opcode %04x", opcode);
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if (opNum == 0 && opcode != 0x0011)
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error ("Cannot find PICT version opcode");
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else if (opNum == 1 && opcode != 0x0C00)
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error ("Cannot find PICT header opcode");
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if (opcode == 0x0000) { // Nop
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stream->readUint16BE(); // Unknown
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} else if (opcode == 0x0001) { // Clip
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// Ignore
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uint16 clipSize = stream->readUint16BE();
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stream->seek(clipSize - 2, SEEK_CUR);
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} else if (opcode == 0x0007) { // PnSize
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// Ignore
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stream->readUint16BE();
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stream->readUint16BE();
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} else if (opcode == 0x0011) { // VersionOp
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uint16 version = stream->readUint16BE();
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if (version != 0x02FF)
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error ("Unknown PICT version");
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} else if (opcode == 0x001E) { // DefHilite
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// Ignore, Contains no Data
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} else if (opcode == 0x0098) { // PackBitsRect
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decodeDirectBitsRect(stream, _imageRect.width(), _imageRect.height(), true);
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_isPaletted = true;
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} else if (opcode == 0x009A) { // DirectBitsRect
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decodeDirectBitsRect(stream, _imageRect.width(), _imageRect.height(), false);
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} else if (opcode == 0x00A1) { // LongComment
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stream->readUint16BE();
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uint16 dataSize = stream->readUint16BE();
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stream->seek(dataSize, SEEK_CUR);
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} else if (opcode == 0x00FF) { // OpEndPic
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stream->readUint16BE();
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break;
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} else if (opcode == 0x0C00) { // HeaderOp
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/* uint16 version = */ stream->readUint16BE();
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stream->readUint16BE(); // Reserved
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/* uint32 hRes = */ stream->readUint32BE();
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/* uint32 vRes = */ stream->readUint32BE();
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Common::Rect origResRect;
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origResRect.top = stream->readUint16BE();
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origResRect.left = stream->readUint16BE();
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origResRect.bottom = stream->readUint16BE();
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origResRect.right = stream->readUint16BE();
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stream->readUint32BE(); // Reserved
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} else if (opcode == 0x8200) { // CompressedQuickTime
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decodeCompressedQuickTime(stream);
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break;
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} else {
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warning("Unknown PICT opcode %04x", opcode);
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}
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}
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// If we got a palette throughout this nonsense, go and grab it
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if (palette && _isPaletted)
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memcpy(palette, _palette, 256 * 4);
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return _outputSurface;
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}
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PictDecoder::PixMap PictDecoder::readPixMap(Common::SeekableReadStream *stream, bool hasBaseAddr) {
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PixMap pixMap;
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pixMap.baseAddr = hasBaseAddr ? stream->readUint32BE() : 0;
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pixMap.rowBytes = stream->readUint16BE() & 0x3fff;
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pixMap.bounds.top = stream->readUint16BE();
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pixMap.bounds.left = stream->readUint16BE();
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pixMap.bounds.bottom = stream->readUint16BE();
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pixMap.bounds.right = stream->readUint16BE();
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pixMap.pmVersion = stream->readUint16BE();
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pixMap.packType = stream->readUint16BE();
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pixMap.packSize = stream->readUint32BE();
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pixMap.hRes = stream->readUint32BE();
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pixMap.vRes = stream->readUint32BE();
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pixMap.pixelType = stream->readUint16BE();
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pixMap.pixelSize = stream->readUint16BE();
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pixMap.cmpCount = stream->readUint16BE();
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pixMap.cmpSize = stream->readUint16BE();
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pixMap.planeBytes = stream->readUint32BE();
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pixMap.pmTable = stream->readUint32BE();
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pixMap.pmReserved = stream->readUint32BE();
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return pixMap;
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}
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struct DirectBitsRectData {
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PictDecoder::PixMap pixMap;
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Common::Rect srcRect;
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Common::Rect dstRect;
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uint16 mode;
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};
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void PictDecoder::decodeDirectBitsRect(Common::SeekableReadStream *stream, uint16 width, uint16 height, bool hasPalette) {
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static const PixelFormat directBitsFormat16 = PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0);
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// Clear the palette
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memset(_palette, 0, sizeof(_palette));
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DirectBitsRectData directBitsData;
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directBitsData.pixMap = readPixMap(stream, !hasPalette);
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// Read in the palette if there is one present
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if (hasPalette) {
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// See http://developer.apple.com/legacy/mac/library/documentation/mac/QuickDraw/QuickDraw-267.html
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stream->readUint32BE(); // seed
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stream->readUint16BE(); // flags
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uint16 colorCount = stream->readUint16BE() + 1;
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for (uint32 i = 0; i < colorCount; i++) {
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stream->readUint16BE();
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_palette[i * 4] = stream->readUint16BE() >> 8;
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_palette[i * 4 + 1] = stream->readUint16BE() >> 8;
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_palette[i * 4 + 2] = stream->readUint16BE() >> 8;
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}
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}
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directBitsData.srcRect.top = stream->readUint16BE();
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directBitsData.srcRect.left = stream->readUint16BE();
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directBitsData.srcRect.bottom = stream->readUint16BE();
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directBitsData.srcRect.right = stream->readUint16BE();
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directBitsData.dstRect.top = stream->readUint16BE();
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directBitsData.dstRect.left = stream->readUint16BE();
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directBitsData.dstRect.bottom = stream->readUint16BE();
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directBitsData.dstRect.right = stream->readUint16BE();
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directBitsData.mode = stream->readUint16BE();
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byte bytesPerPixel = 0;
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if (directBitsData.pixMap.pixelSize <= 8)
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bytesPerPixel = 1;
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else if (directBitsData.pixMap.pixelSize == 32)
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bytesPerPixel = 3;
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else
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bytesPerPixel = directBitsData.pixMap.pixelSize / 8;
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_outputSurface = new Graphics::Surface();
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_outputSurface->create(width, height, (bytesPerPixel == 1) ? 1 : _pixelFormat.bytesPerPixel);
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byte *buffer = new byte[width * height * bytesPerPixel];
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// Read in amount of data per row
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for (uint16 i = 0; i < directBitsData.pixMap.bounds.height(); i++) {
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// NOTE: Compression 0 is "default". The format in SCI games is packed when 0.
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// In the future, we may need to have something to set the "default" packing
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// format, but this is good for now.
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if (directBitsData.pixMap.packType == 1 || directBitsData.pixMap.rowBytes < 8) { // Unpacked, Pad-Byte (on 24-bit)
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// TODO: Finish this. Hasn't been needed (yet).
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error("Unpacked DirectBitsRect data (padded)");
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} else if (directBitsData.pixMap.packType == 2) { // Unpacked, No Pad-Byte (on 24-bit)
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// TODO: Finish this. Hasn't been needed (yet).
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error("Unpacked DirectBitsRect data (not padded)");
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} else if (directBitsData.pixMap.packType == 0 || directBitsData.pixMap.packType > 2) { // Packed
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uint16 byteCount = (directBitsData.pixMap.rowBytes > 250) ? stream->readUint16BE() : stream->readByte();
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decodeDirectBitsLine(buffer + i * _outputSurface->w * bytesPerPixel, directBitsData.pixMap.rowBytes, stream->readStream(byteCount), directBitsData.pixMap.pixelSize, bytesPerPixel);
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}
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}
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if (bytesPerPixel == 1) {
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// Just copy to the image
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memcpy(_outputSurface->pixels, buffer, _outputSurface->w * _outputSurface->h);
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} else if (bytesPerPixel == 2) {
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// Convert from 16-bit to whatever surface we need
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for (uint16 y = 0; y < _outputSurface->h; y++) {
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for (uint16 x = 0; x < _outputSurface->w; x++) {
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byte r = 0, g = 0, b = 0;
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uint32 color = READ_BE_UINT16(buffer + (y * _outputSurface->w + x) * bytesPerPixel);
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directBitsFormat16.colorToRGB(color, r, g, b);
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if (_pixelFormat.bytesPerPixel == 2)
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*((uint16 *)_outputSurface->getBasePtr(x, y)) = _pixelFormat.RGBToColor(r, g, b);
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else
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*((uint32 *)_outputSurface->getBasePtr(x, y)) = _pixelFormat.RGBToColor(r, g, b);
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}
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}
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} else {
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// Convert from 24-bit (planar!) to whatever surface we need
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for (uint16 y = 0; y < _outputSurface->h; y++) {
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for (uint16 x = 0; x < _outputSurface->w; x++) {
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byte r = *(buffer + y * _outputSurface->w * 3 + x);
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byte g = *(buffer + y * _outputSurface->w * 3 + _outputSurface->w + x);
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byte b = *(buffer + y * _outputSurface->w * 3 + _outputSurface->w * 2 + x);
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if (_pixelFormat.bytesPerPixel == 2)
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*((uint16 *)_outputSurface->getBasePtr(x, y)) = _pixelFormat.RGBToColor(r, g, b);
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else
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*((uint32 *)_outputSurface->getBasePtr(x, y)) = _pixelFormat.RGBToColor(r, g, b);
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}
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}
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}
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delete[] buffer;
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}
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void PictDecoder::decodeDirectBitsLine(byte *out, uint32 length, Common::SeekableReadStream *data, byte bitsPerPixel, byte bytesPerPixel) {
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uint32 dataDecoded = 0;
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byte bytesPerDecode = (bytesPerPixel == 2) ? 2 : 1;
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while (data->pos() < data->size() && dataDecoded < length) {
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byte op = data->readByte();
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if (op & 0x80) {
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uint32 runSize = (op ^ 255) + 2;
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uint16 value = (bytesPerDecode == 2) ? data->readUint16BE() : data->readByte();
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for (uint32 i = 0; i < runSize; i++) {
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if (bytesPerDecode == 2) {
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WRITE_BE_UINT16(out, value);
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out += 2;
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} else {
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outputPixelBuffer(out, value, bitsPerPixel);
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}
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}
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dataDecoded += runSize * bytesPerDecode;
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} else {
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uint32 runSize = (op + 1) * bytesPerDecode;
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for (uint32 i = 0; i < runSize; i++)
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outputPixelBuffer(out, data->readByte(), bitsPerPixel);
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dataDecoded += runSize;
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}
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}
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// HACK: rowBytes is in 32-bit, but the data is 24-bit...
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if (bytesPerPixel == 3)
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dataDecoded += length / 4;
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if (length != dataDecoded)
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warning("Mismatched DirectBits read (%d/%d)", dataDecoded, length);
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delete data;
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}
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void PictDecoder::outputPixelBuffer(byte *&out, byte value, byte bitsPerPixel) {
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switch (bitsPerPixel) {
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case 1:
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for (int i = 7; i >= 0; i--)
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*out++ = (value >> i) & 1;
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break;
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case 2:
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for (int i = 6; i >= 0; i -= 2)
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*out++ = (value >> i) & 3;
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break;
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case 4:
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*out++ = (value >> 4) & 0xf;
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*out++ = value & 0xf;
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break;
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default:
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*out++ = value;
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}
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}
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// Compressed QuickTime details can be found here:
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// http://developer.apple.com/documentation/QuickTime/Rm/CompressDecompress/ImageComprMgr/B-Chapter/2TheImageCompression.html
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// http://developer.apple.com/documentation/QuickTime/Rm/CompressDecompress/ImageComprMgr/F-Chapter/6WorkingwiththeImage.html
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// I'm just ignoring that because Myst ME uses none of that extra stuff. The offset is always the same.
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void PictDecoder::decodeCompressedQuickTime(Common::SeekableReadStream *stream) {
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uint32 dataSize = stream->readUint32BE();
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uint32 startPos = stream->pos();
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Common::SeekableReadStream *jpegStream = new Common::SeekableSubReadStream(stream, stream->pos() + 156, stream->pos() + dataSize);
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if (!_jpeg->read(jpegStream))
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error("PictDecoder::decodeCompressedQuickTime(): Could not decode JPEG data");
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_outputSurface = _jpeg->getSurface(_pixelFormat);
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stream->seek(startPos + dataSize);
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delete jpegStream;
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}
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} // End of namespace Graphics
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