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/* 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.
*
*/
#ifndef PSP_PNG_IMAGE_H
#define PSP_PNG_IMAGE_H
#include <png.h>
class PngLoader {
private:
bool basicImageLoad(); // common operation
bool findImageDimensions(); // find dimensions of a given PNG file
bool loadImageIntoBuffer();
static void warningFn(png_structp png_ptr, png_const_charp warning_msg);
static void libReadFunc(png_structp pngPtr, png_bytep data, png_size_t length);
Common::SeekableReadStream *_file;
Buffer *_buffer;
Palette *_palette;
uint32 _width;
uint32 _height;
uint32 _paletteSize;
Buffer::HowToSize _sizeBy;
// PNG lib values
int _bitDepth;
png_structp _pngPtr;
png_infop _infoPtr;
int _colorType;
uint32 _channels;
public:
enum Status {
OK,
OUT_OF_MEMORY,
BAD_FILE
};
PngLoader(Common::SeekableReadStream *file, Buffer &buffer, Palette &palette,
Buffer::HowToSize sizeBy = Buffer::kSizeByTextureSize) :
_file(file), _buffer(&buffer), _palette(&palette),
_width(0), _height(0), _paletteSize(0),
_bitDepth(0), _sizeBy(sizeBy), _pngPtr(0),
_infoPtr(0), _colorType(0), _channels(0) {}
PngLoader::Status allocate();
bool load();
};
#endif /* PSP_PNG_IMAGE_H */
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