mirror of
https://github.com/libretro/scummvm.git
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114 lines
3.3 KiB
C++
114 lines
3.3 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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*
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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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*
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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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*/
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#include "image/codecs/bmp_raw.h"
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#include "common/stream.h"
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#include "common/textconsole.h"
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#include "graphics/surface.h"
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namespace Image {
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BitmapRawDecoder::BitmapRawDecoder(int width, int height, int bitsPerPixel) : Codec(),
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_surface(0), _width(width), _height(height), _bitsPerPixel(bitsPerPixel) {
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}
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BitmapRawDecoder::~BitmapRawDecoder() {
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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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const Graphics::Surface *BitmapRawDecoder::decodeFrame(Common::SeekableReadStream &stream) {
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Graphics::PixelFormat format = getPixelFormat();
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_surface = new Graphics::Surface();
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_surface->create(_width, _height, format);
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int srcPitch = _width * (_bitsPerPixel >> 3);
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const int extraDataLength = (srcPitch % 4) ? 4 - (srcPitch % 4) : 0;
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if (_bitsPerPixel == 8) {
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byte *dst = (byte *)_surface->getPixels();
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for (int i = 0; i < _height; i++) {
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stream.read(dst + (_height - i - 1) * _width, _width);
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stream.skip(extraDataLength);
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}
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} else if (_bitsPerPixel == 24) {
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byte *dst = (byte *)_surface->getBasePtr(0, _height - 1);
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for (int i = 0; i < _height; i++) {
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for (int j = 0; j < _width; j++) {
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byte b = stream.readByte();
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byte g = stream.readByte();
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byte r = stream.readByte();
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uint32 color = format.RGBToColor(r, g, b);
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*((uint32 *)dst) = color;
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dst += format.bytesPerPixel;
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}
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stream.skip(extraDataLength);
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dst -= _surface->pitch * 2;
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}
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} else { // 32 bpp
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byte *dst = (byte *)_surface->getBasePtr(0, _height - 1);
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for (int i = 0; i < _height; i++) {
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for (int j = 0; j < _width; j++) {
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byte b = stream.readByte();
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byte g = stream.readByte();
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byte r = stream.readByte();
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// Ignore the last byte, as in v3 it is unused
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// and should thus NOT be used as alpha.
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// ref: http://msdn.microsoft.com/en-us/library/windows/desktop/dd183376%28v=vs.85%29.aspx
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stream.readByte();
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uint32 color = format.RGBToColor(r, g, b);
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*((uint32 *)dst) = color;
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dst += format.bytesPerPixel;
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}
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stream.skip(extraDataLength);
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dst -= _surface->pitch * 2;
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}
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}
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return _surface;
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}
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Graphics::PixelFormat BitmapRawDecoder::getPixelFormat() const {
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switch (_bitsPerPixel) {
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case 8:
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return Graphics::PixelFormat::createFormatCLUT8();
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case 24:
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case 32:
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return Graphics::PixelFormat(4, 8, 8, 8, 8, 8, 16, 24, 0);
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}
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error("Unhandled BMP raw %dbpp", _bitsPerPixel);
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}
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} // End of namespace Image
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