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Diffstat (limited to 'engines/mohawk/video/rpza.cpp')
-rw-r--r-- | engines/mohawk/video/rpza.cpp | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/engines/mohawk/video/rpza.cpp b/engines/mohawk/video/rpza.cpp deleted file mode 100644 index f48c055ae2..0000000000 --- a/engines/mohawk/video/rpza.cpp +++ /dev/null @@ -1,208 +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. - * - * $URL$ - * $Id$ - * - */ - - // Based off ffmpeg's RPZA decoder - -#include "mohawk/video/rpza.h" - -#include "common/system.h" -#include "graphics/colormasks.h" - -namespace Mohawk { - -RPZADecoder::RPZADecoder(uint16 width, uint16 height) : Graphics::Codec() { - _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, "RPZA corrected width: %d", width); - - _surface = new Graphics::Surface(); - _surface->create(width, height, _pixelFormat.bytesPerPixel); -} - -#define ADVANCE_BLOCK() \ - pixelPtr += 4; \ - if (pixelPtr >= _surface->w) { \ - pixelPtr = 0; \ - rowPtr += _surface->w * 4; \ - } \ - totalBlocks--; \ - if (totalBlocks < 0) \ - error("block counter just went negative (this should not happen)") \ - -// Convert from RGB555 to the format specified by the screen -#define PUT_PIXEL(color) \ - if ((int32)blockPtr < _surface->w * _surface->h) { \ - byte r = 0, g = 0, b = 0; \ - Graphics::colorToRGB<Graphics::ColorMasks<555> >(color, r, g, b); \ - if (_pixelFormat.bytesPerPixel == 2) \ - *((uint16 *)_surface->pixels + blockPtr) = _pixelFormat.RGBToColor(r, g, b); \ - else \ - *((uint32 *)_surface->pixels + blockPtr) = _pixelFormat.RGBToColor(r, g, b); \ - } \ - blockPtr++ - -Graphics::Surface *RPZADecoder::decodeImage(Common::SeekableReadStream *stream) { - uint16 colorA = 0, colorB = 0; - uint16 color4[4]; - - uint32 rowPtr = 0; - uint32 pixelPtr = 0; - uint32 blockPtr = 0; - uint32 rowInc = _surface->w - 4; - uint16 ta; - uint16 tb; - - // First byte is always 0xe1. Warn if it's different - byte firstByte = stream->readByte(); - if (firstByte != 0xe1) - warning("First RPZA chunk byte is 0x%02x instead of 0xe1", firstByte); - - // Get chunk size, ingnoring first byte - uint32 chunkSize = stream->readUint16BE() << 8; - chunkSize += stream->readByte(); - - // If length mismatch use size from MOV file and try to decode anyway - if (chunkSize != (uint32)stream->size()) { - warning("MOV chunk size != encoded chunk size; using MOV chunk size"); - chunkSize = stream->size(); - } - - // Number of 4x4 blocks in frame - int32 totalBlocks = ((_surface->w + 3) / 4) * ((_surface->h + 3) / 4); - - // Process chunk data - while ((uint32)stream->pos() < chunkSize) { - byte opcode = stream->readByte(); // Get opcode - byte numBlocks = (opcode & 0x1f) + 1; // Extract block counter from opcode - - // If opcode MSbit is 0, we need more data to decide what to do - if ((opcode & 0x80) == 0) { - colorA = (opcode << 8) | stream->readByte(); - opcode = 0; - if (stream->readByte() & 0x80) { - // Must behave as opcode 110xxxxx, using colorA computed - // above. Use fake opcode 0x20 to enter switch block at - // the right place - opcode = 0x20; - numBlocks = 1; - } - stream->seek(-1, SEEK_CUR); - } - - switch (opcode & 0xe0) { - case 0x80: // Skip blocks - while (numBlocks--) { - ADVANCE_BLOCK(); - } - break; - case 0xa0: // Fill blocks with one color - colorA = stream->readUint16BE(); - while (numBlocks--) { - blockPtr = rowPtr + pixelPtr; - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - for (byte pixel_x = 0; pixel_x < 4; pixel_x++) { - PUT_PIXEL(colorA); - } - blockPtr += rowInc; - } - ADVANCE_BLOCK(); - } - break; - - // Fill blocks with 4 colors - case 0xc0: - colorA = stream->readUint16BE(); - case 0x20: - colorB = stream->readUint16BE(); - - // Sort out the colors - color4[0] = colorB; - color4[1] = 0; - color4[2] = 0; - color4[3] = colorA; - - // Red components - ta = (colorA >> 10) & 0x1F; - tb = (colorB >> 10) & 0x1F; - color4[1] |= ((11 * ta + 21 * tb) >> 5) << 10; - color4[2] |= ((21 * ta + 11 * tb) >> 5) << 10; - - // Green components - ta = (colorA >> 5) & 0x1F; - tb = (colorB >> 5) & 0x1F; - color4[1] |= ((11 * ta + 21 * tb) >> 5) << 5; - color4[2] |= ((21 * ta + 11 * tb) >> 5) << 5; - - // Blue components - ta = colorA & 0x1F; - tb = colorB & 0x1F; - color4[1] |= ((11 * ta + 21 * tb) >> 5); - color4[2] |= ((21 * ta + 11 * tb) >> 5); - - while (numBlocks--) { - blockPtr = rowPtr + pixelPtr; - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - byte index = stream->readByte(); - for (byte pixel_x = 0; pixel_x < 4; pixel_x++){ - byte idx = (index >> (2 * (3 - pixel_x))) & 0x03; - PUT_PIXEL(color4[idx]); - } - blockPtr += rowInc; - } - ADVANCE_BLOCK(); - } - break; - - // Fill block with 16 colors - case 0x00: - blockPtr = rowPtr + pixelPtr; - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - for (byte pixel_x = 0; pixel_x < 4; pixel_x++){ - // We already have color of upper left pixel - if (pixel_y != 0 || pixel_x != 0) - colorA = stream->readUint16BE(); - - PUT_PIXEL(colorA); - } - blockPtr += rowInc; - } - ADVANCE_BLOCK(); - break; - - // Unknown opcode - default: - error("Unknown opcode %02x in rpza chunk", opcode); - } - } - - return _surface; -} - -} // End of namespace Mohawk |