mirror of
https://github.com/libretro/scummvm.git
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88 lines
2.8 KiB
C++
88 lines
2.8 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/system.h"
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#include "graphics/conversion.h" // For YUV2RGB
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#include "mohawk/jpeg.h"
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namespace Mohawk {
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JPEGDecoder::JPEGDecoder(bool freeSurfaceAfterUse) : Graphics::Codec(), _freeSurfaceAfterUse(freeSurfaceAfterUse) {
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_jpeg = new Graphics::JPEG();
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_pixelFormat = g_system->getScreenFormat();
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_surface = NULL;
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}
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JPEGDecoder::~JPEGDecoder() {
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delete _jpeg;
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if (_surface) {
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_surface->free();
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delete _surface;
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}
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}
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Graphics::Surface *JPEGDecoder::decodeImage(Common::SeekableReadStream* stream) {
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_jpeg->read(stream);
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Graphics::Surface *ySurface = _jpeg->getComponent(1);
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Graphics::Surface *uSurface = _jpeg->getComponent(2);
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Graphics::Surface *vSurface = _jpeg->getComponent(3);
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Graphics::Surface *destSurface = NULL;
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// If we should free the surface after use, use the internal _surface storage
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// (this should be used when using as a Codec, as the Codecs should free their
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// surfaces when deleting the Codec object). Otherwise, create a new Surface
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// as the destination.
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if (_freeSurfaceAfterUse) {
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if (!_surface) {
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_surface = new Graphics::Surface();
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_surface->create(ySurface->w, ySurface->h, _pixelFormat.bytesPerPixel);
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}
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destSurface = _surface;
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} else {
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destSurface = new Graphics::Surface();
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destSurface->create(ySurface->w, ySurface->h, _pixelFormat.bytesPerPixel);
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}
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assert(destSurface);
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for (uint16 i = 0; i < destSurface->h; i++) {
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for (uint16 j = 0; j < destSurface->w; j++) {
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byte r = 0, g = 0, b = 0;
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Graphics::YUV2RGB(*((byte *)ySurface->getBasePtr(j, i)), *((byte *)uSurface->getBasePtr(j, i)), *((byte *)vSurface->getBasePtr(j, i)), r, g, b);
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if (_pixelFormat.bytesPerPixel == 2)
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*((uint16 *)destSurface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b);
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else
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*((uint32 *)destSurface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b);
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}
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}
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return destSurface;
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}
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} // End of namespace Mohawk
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