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Diffstat (limited to 'engines/mohawk/video/qtrle.cpp')
-rw-r--r-- | engines/mohawk/video/qtrle.cpp | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/engines/mohawk/video/qtrle.cpp b/engines/mohawk/video/qtrle.cpp deleted file mode 100644 index c06dbefcb3..0000000000 --- a/engines/mohawk/video/qtrle.cpp +++ /dev/null @@ -1,420 +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. - * - * $URL$ - * $Id$ - * - */ - -// QuickTime RLE Decoder -// Based off ffmpeg's QuickTime RLE decoder (written by Mike Melanson) - -#include "mohawk/video/qtrle.h" - -#include "common/scummsys.h" -#include "common/stream.h" -#include "common/system.h" -#include "graphics/colormasks.h" -#include "graphics/surface.h" - -namespace Mohawk { - -QTRLEDecoder::QTRLEDecoder(uint16 width, uint16 height, byte bitsPerPixel) : Graphics::Codec() { - _bitsPerPixel = bitsPerPixel; - _pixelFormat = g_system->getScreenFormat(); - - // We need to increase the surface size to a multiple of 4 - uint16 wMod = width % 4; - if(wMod != 0) - width += 4 - wMod; - - debug(2, "QTRLE corrected width: %d", width); - - _surface = new Graphics::Surface(); - _surface->create(width, height, _bitsPerPixel <= 8 ? 1 : _pixelFormat.bytesPerPixel); -} - -#define CHECK_STREAM_PTR(n) \ - if ((stream->pos() + n) > stream->size()) { \ - warning ("Problem: stream out of bounds (%d >= %d)", stream->pos() + n, stream->size()); \ - return; \ - } - -#define CHECK_PIXEL_PTR(n) \ - if ((int32)pixelPtr + n > _surface->w * _surface->h) { \ - warning ("Problem: pixel ptr = %d, pixel limit = %d", pixelPtr + n, _surface->w * _surface->h); \ - return; \ - } \ - -void QTRLEDecoder::decode1(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { - uint32 pixelPtr = 0; - byte *rgb = (byte *)_surface->pixels; - - while (linesToChange) { - CHECK_STREAM_PTR(2); - byte skip = stream->readByte(); - int8 rleCode = stream->readSByte(); - - if (rleCode == 0) - break; - - if (skip & 0x80) { - linesToChange--; - rowPtr += _surface->w; - pixelPtr = rowPtr + 2 * (skip & 0x7f); - } else - pixelPtr += 2 * skip; - - if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - // get the next 2 bytes from the stream, treat them as groups of 8 pixels, and output them rleCode times */ - CHECK_STREAM_PTR(2); - byte pi0 = stream->readByte(); - byte pi1 = stream->readByte(); - CHECK_PIXEL_PTR(rleCode * 2); - - while (rleCode--) { - rgb[pixelPtr++] = pi0; - rgb[pixelPtr++] = pi1; - } - } else { - // copy the same pixel directly to output 2 times - rleCode *= 2; - CHECK_STREAM_PTR(rleCode); - CHECK_PIXEL_PTR(rleCode); - - while (rleCode--) - rgb[pixelPtr++] = stream->readByte(); - } - } -} - -void QTRLEDecoder::decode2_4(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange, byte bpp) { - uint32 pixelPtr = 0; - byte *rgb = (byte *)_surface->pixels; - byte numPixels = (bpp == 4) ? 8 : 16; - - while (linesToChange--) { - CHECK_STREAM_PTR(2); - pixelPtr = rowPtr + (numPixels * (stream->readByte() - 1)); - - for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { - if (rleCode == 0) { - // there's another skip code in the stream - CHECK_STREAM_PTR(1); - pixelPtr += (numPixels * (stream->readByte() - 1)); - } else if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - - // get the next 4 bytes from the stream, treat them as palette indices, and output them rleCode times */ - CHECK_STREAM_PTR(4); - - byte pi[16]; // 16 palette indices - - for (int8 i = numPixels - 1; i >= 0; i--) { - pi[numPixels - 1 - i] = (stream->readByte() >> ((i * bpp) & 0x07)) & ((1 << bpp) - 1); - - // FIXME: Is this right? - //stream_ptr += ((i & ((num_pixels>>2)-1)) == 0); - if ((i & ((numPixels >> 2) - 1)) == 0) - stream->readByte(); - } - - CHECK_PIXEL_PTR(rleCode * numPixels); - - while (rleCode--) - for (byte i = 0; i < numPixels; i++) - rgb[pixelPtr++] = pi[i]; - } else { - // copy the same pixel directly to output 4 times - rleCode *= 4; - CHECK_STREAM_PTR(rleCode); - CHECK_PIXEL_PTR(rleCode * (numPixels >> 2)); - - while (rleCode--) { - byte temp = stream->readByte(); - if (bpp == 4) { - rgb[pixelPtr++] = (temp >> 4) & 0x0f; - rgb[pixelPtr++] = temp & 0x0f; - } else { - rgb[pixelPtr++] = (temp >> 6) & 0x03; - rgb[pixelPtr++] = (temp >> 4) & 0x03; - rgb[pixelPtr++] = (temp >> 2) & 0x03; - rgb[pixelPtr++] = temp & 0x03; - } - } - } - } - - rowPtr += _surface->w; - } -} - -void QTRLEDecoder::decode8(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { - uint32 pixelPtr = 0; - byte *rgb = (byte *)_surface->pixels; - - while (linesToChange--) { - CHECK_STREAM_PTR(2); - pixelPtr = rowPtr + 4 * (stream->readByte() - 1); - - for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { - if (rleCode == 0) { - // there's another skip code in the stream - CHECK_STREAM_PTR(1); - pixelPtr += 4 * (stream->readByte() - 1); - } else if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - - // get the next 4 bytes from the stream, treat them as palette indices, and output them rleCode times - CHECK_STREAM_PTR(4); - - byte pi[4]; // 4 palette indexes - - for (byte i = 0; i < 4; i++) - pi[i] = stream->readByte(); - - CHECK_PIXEL_PTR(rleCode * 4); - - while (rleCode--) - for (byte i = 0; i < 4; i++) - rgb[pixelPtr++] = pi[i]; - } else { - // copy the same pixel directly to output 4 times - rleCode *= 4; - CHECK_STREAM_PTR(rleCode); - CHECK_PIXEL_PTR(rleCode); - - while (rleCode--) - rgb[pixelPtr++] = stream->readByte(); - } - } - - rowPtr += _surface->w; - } -} - -void QTRLEDecoder::decode16(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { - uint32 pixelPtr = 0; - OverlayColor *rgb = (OverlayColor *)_surface->pixels; - - while (linesToChange--) { - CHECK_STREAM_PTR(2); - pixelPtr = rowPtr + stream->readByte() - 1; - - for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { - if (rleCode == 0) { - // there's another skip code in the stream - CHECK_STREAM_PTR(1); - pixelPtr += stream->readByte() - 1; - } else if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - CHECK_STREAM_PTR(2); - - uint16 rgb16 = stream->readUint16BE(); - - CHECK_PIXEL_PTR(rleCode); - - while (rleCode--) { - // Convert from RGB555 to the format specified by the Overlay - byte r = 0, g = 0, b = 0; - Graphics::colorToRGB<Graphics::ColorMasks<555> >(rgb16, r, g, b); - rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); - } - } else { - CHECK_STREAM_PTR(rleCode * 2); - CHECK_PIXEL_PTR(rleCode); - - // copy pixels directly to output - while (rleCode--) { - uint16 rgb16 = stream->readUint16BE(); - - // Convert from RGB555 to the format specified by the Overlay - byte r = 0, g = 0, b = 0; - Graphics::colorToRGB<Graphics::ColorMasks<555> >(rgb16, r, g, b); - rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); - } - } - } - - rowPtr += _surface->w; - } -} - -void QTRLEDecoder::decode24(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { - uint32 pixelPtr = 0; - OverlayColor *rgb = (OverlayColor *)_surface->pixels; - - while (linesToChange--) { - CHECK_STREAM_PTR(2); - pixelPtr = rowPtr + stream->readByte() - 1; - - for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { - if (rleCode == 0) { - // there's another skip code in the stream - CHECK_STREAM_PTR(1); - pixelPtr += stream->readByte() - 1; - } else if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - - CHECK_STREAM_PTR(3); - - byte r = stream->readByte(); - byte g = stream->readByte(); - byte b = stream->readByte(); - - CHECK_PIXEL_PTR(rleCode); - - while (rleCode--) - rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); - } else { - CHECK_STREAM_PTR(rleCode * 3); - CHECK_PIXEL_PTR(rleCode); - - // copy pixels directly to output - while (rleCode--) { - byte r = stream->readByte(); - byte g = stream->readByte(); - byte b = stream->readByte(); - rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); - } - } - } - - rowPtr += _surface->w; - } -} - -void QTRLEDecoder::decode32(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { - uint32 pixelPtr = 0; - OverlayColor *rgb = (OverlayColor *)_surface->pixels; - - while (linesToChange--) { - CHECK_STREAM_PTR(2); - pixelPtr = rowPtr + stream->readByte() - 1; - - for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { - if (rleCode == 0) { - // there's another skip code in the stream - CHECK_STREAM_PTR(1); - pixelPtr += stream->readByte() - 1; - } else if (rleCode < 0) { - // decode the run length code - rleCode = -rleCode; - - CHECK_STREAM_PTR(4); - - byte a = stream->readByte(); - byte r = stream->readByte(); - byte g = stream->readByte(); - byte b = stream->readByte(); - - CHECK_PIXEL_PTR(rleCode); - - while (rleCode--) - rgb[pixelPtr++] = _pixelFormat.ARGBToColor(a, r, g, b); - } else { - CHECK_STREAM_PTR(rleCode * 4); - CHECK_PIXEL_PTR(rleCode); - - // copy pixels directly to output - while (rleCode--) { - byte a = stream->readByte(); - byte r = stream->readByte(); - byte g = stream->readByte(); - byte b = stream->readByte(); - rgb[pixelPtr++] = _pixelFormat.ARGBToColor(a, r, g, b); - } - } - } - - rowPtr += _surface->w; - } -} - -Graphics::Surface *QTRLEDecoder::decodeImage(Common::SeekableReadStream *stream) { - uint16 start_line = 0; - uint16 height = _surface->h; - - // check if this frame is even supposed to change - if (stream->size() < 8) - return _surface; - - // start after the chunk size - stream->readUint32BE(); - - // fetch the header - uint16 header = stream->readUint16BE(); - - // if a header is present, fetch additional decoding parameters - if (header & 8) { - if(stream->size() < 14) - return _surface; - start_line = stream->readUint16BE(); - stream->readUint16BE(); // Unknown - height = stream->readUint16BE(); - stream->readUint16BE(); // Unknown - } - - uint32 row_ptr = _surface->w * start_line; - - switch (_bitsPerPixel) { - case 1: - case 33: - decode1(stream, row_ptr, height); - break; - case 2: - case 34: - decode2_4(stream, row_ptr, height, 2); - break; - case 4: - case 36: - decode2_4(stream, row_ptr, height, 4); - break; - case 8: - case 40: - decode8(stream, row_ptr, height); - break; - case 16: - decode16(stream, row_ptr, height); - break; - case 24: - decode24(stream, row_ptr, height); - break; - case 32: - decode32(stream, row_ptr, height); - break; - default: - error ("Unsupported bits per pixel %d", _bitsPerPixel); - } - - return _surface; -} - -QTRLEDecoder::~QTRLEDecoder() { - _surface->free(); -} - -} // End of namespace Mohawk |