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Diffstat (limited to 'graphics/decoders/iff.cpp')
| -rw-r--r-- | graphics/decoders/iff.cpp | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/graphics/decoders/iff.cpp b/graphics/decoders/iff.cpp deleted file mode 100644 index 7b37969fc1..0000000000 --- a/graphics/decoders/iff.cpp +++ /dev/null @@ -1,241 +0,0 @@ -/* 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. - */ - -#include "common/iff_container.h" -#include "common/stream.h" -#include "common/util.h" - -#include "graphics/decoders/iff.h" - -namespace Graphics { - -IFFDecoder::IFFDecoder() { - _surface = 0; - _palette = 0; - - destroy(); -} - -IFFDecoder::~IFFDecoder() { - destroy(); -} - -void IFFDecoder::destroy() { - if (_surface) { - _surface->free(); - delete _surface; - _surface = 0; - } - - if (_palette) { - delete[] _palette; - _palette = 0; - } - - memset(&_header, 0, sizeof(Header)); - _paletteRanges.clear(); - _type = TYPE_UNKNOWN; - _paletteColorCount = 0; - _numRelevantPlanes = 8; - _pixelPacking = false; -} - -bool IFFDecoder::loadStream(Common::SeekableReadStream &stream) { - destroy(); - - const uint32 form = stream.readUint32BE(); - - if (form != ID_FORM) { - warning("Failed reading IFF-file"); - return false; - } - - stream.skip(4); - - const uint32 type = stream.readUint32BE(); - - switch (type) { - case ID_ILBM: - _type = TYPE_ILBM; - break; - case ID_PBM: - _type = TYPE_PBM; - break; - } - - if (type == TYPE_UNKNOWN) { - warning("Failed reading IFF-file"); - return false; - } - - while (1) { - const uint32 chunkType = stream.readUint32BE(); - const uint32 chunkSize = stream.readUint32BE(); - - if (stream.eos()) - break; - - switch (chunkType) { - case ID_BMHD: - loadHeader(stream); - break; - case ID_CMAP: - loadPalette(stream, chunkSize); - break; - case ID_CRNG: - loadPaletteRange(stream, chunkSize); - break; - case ID_BODY: - loadBitmap(stream); - break; - default: - stream.skip(chunkSize); - } - } - - return true; -} - -void IFFDecoder::loadHeader(Common::SeekableReadStream &stream) { - _header.width = stream.readUint16BE(); - _header.height = stream.readUint16BE(); - _header.x = stream.readUint16BE(); - _header.y = stream.readUint16BE(); - _header.numPlanes = stream.readByte(); - _header.masking = stream.readByte(); - _header.compression = stream.readByte(); - _header.flags = stream.readByte(); - _header.transparentColor = stream.readUint16BE(); - _header.xAspect = stream.readByte(); - _header.yAspect = stream.readByte(); - _header.pageWidth = stream.readUint16BE(); - _header.pageHeight = stream.readUint16BE(); - - assert(_header.width >= 1); - assert(_header.height >= 1); - assert(_header.numPlanes >= 1 && _header.numPlanes <= 8 && _header.numPlanes != 7); -} - -void IFFDecoder::loadPalette(Common::SeekableReadStream &stream, const uint32 size) { - _palette = new byte[size]; - stream.read(_palette, size); - _paletteColorCount = size / 3; -} - -void IFFDecoder::loadPaletteRange(Common::SeekableReadStream &stream, const uint32 size) { - PaletteRange range; - - range.timer = stream.readSint16BE(); - range.step = stream.readSint16BE(); - range.flags = stream.readSint16BE(); - range.first = stream.readByte(); - range.last = stream.readByte(); - - _paletteRanges.push_back(range); -} - -void IFFDecoder::loadBitmap(Common::SeekableReadStream &stream) { - _numRelevantPlanes = MIN(_numRelevantPlanes, _header.numPlanes); - - if (_numRelevantPlanes != 1 && _numRelevantPlanes != 2 && _numRelevantPlanes != 4) - _pixelPacking = false; - - uint16 outPitch = _header.width; - - if (_pixelPacking) - outPitch /= (8 / _numRelevantPlanes); - - // FIXME: CLUT8 is not a proper format for packed bitmaps but there is no way to tell it to use 1, 2 or 4 bits per pixel - _surface = new Graphics::Surface(); - _surface->create(outPitch, _header.height, Graphics::PixelFormat::createFormatCLUT8()); - - if (_type == TYPE_ILBM) { - uint32 scanlinePitch = ((_header.width + 15) >> 4) << 1; - byte *scanlines = new byte[scanlinePitch * _header.numPlanes]; - byte *data = (byte *)_surface->getPixels(); - - for (uint16 i = 0; i < _header.height; ++i) { - byte *scanline = scanlines; - - for (uint16 j = 0; j < _header.numPlanes; ++j) { - uint16 outSize = scanlinePitch; - - if (_header.compression) { - Common::PackBitsReadStream packStream(stream); - packStream.read(scanline, outSize); - } else { - stream.read(scanline, outSize); - } - - scanline += outSize; - } - - packPixels(scanlines, data, scanlinePitch, outPitch); - data += outPitch; - } - - delete[] scanlines; - } else if (_type == TYPE_PBM) { - byte *data = (byte *)_surface->getPixels(); - uint32 outSize = _header.width * _header.height; - - if (_header.compression) { - Common::PackBitsReadStream packStream(stream); - packStream.read(data, outSize); - } else { - stream.read(data, outSize); - } - } -} - -void IFFDecoder::packPixels(byte *scanlines, byte *data, const uint16 scanlinePitch, const uint16 outPitch) { - uint32 numPixels = _header.width; - - if (_pixelPacking) - numPixels = outPitch * (8 / _numRelevantPlanes); - - for (uint32 x = 0; x < numPixels; ++x) { - byte *scanline = scanlines; - byte pixel = 0; - byte offset = x >> 3; - byte bit = 0x80 >> (x & 7); - - // first build a pixel by scanning all the usable planes in the input - for (uint32 plane = 0; plane < _numRelevantPlanes; ++plane) { - if (scanline[offset] & bit) - pixel |= (1 << plane); - - scanline += scanlinePitch; - } - - // then output the pixel according to the requested packing - if (!_pixelPacking) - data[x] = pixel; - else if (_numRelevantPlanes == 1) - data[x / 8] |= (pixel << (x & 7)); - else if (_numRelevantPlanes == 2) - data[x / 4] |= (pixel << ((x & 3) << 1)); - else if (_numRelevantPlanes == 4) - data[x / 2] |= (pixel << ((x & 1) << 2)); - } -} - -} // End of namespace Graphics |