082d9a4465
Sometimes we can have an 8bit file for example that has a palette of 16 colors or less, so we need to go by the bit depth rather than inferring the bit depth from the palette size. svn-id: r53917
74 lines
2.1 KiB
C++
74 lines
2.1 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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#ifndef PSP_PNG_IMAGE_H
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#define PSP_PNG_IMAGE_H
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#include <png.h>
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class PngLoader {
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private:
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bool basicImageLoad(); // common operation
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bool findImageDimensions(); // find dimensions of a given PNG file
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bool loadImageIntoBuffer();
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static void warningFn(png_structp png_ptr, png_const_charp warning_msg);
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static void libReadFunc(png_structp pngPtr, png_bytep data, png_size_t length);
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Common::SeekableReadStream *_file;
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Buffer *_buffer;
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Palette *_palette;
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uint32 _width;
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uint32 _height;
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uint32 _paletteSize;
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Buffer::HowToSize _sizeBy;
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// PNG lib values
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int _bitDepth;
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png_structp _pngPtr;
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png_infop _infoPtr;
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int _colorType;
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uint32 _channels;
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public:
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enum Status {
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OK,
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OUT_OF_MEMORY,
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BAD_FILE
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};
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PngLoader(Common::SeekableReadStream *file, Buffer &buffer, Palette &palette,
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Buffer::HowToSize sizeBy = Buffer::kSizeByTextureSize) :
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_file(file), _buffer(&buffer), _palette(&palette),
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_width(0), _height(0), _paletteSize(0),
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_bitDepth(0), _sizeBy(sizeBy), _pngPtr(0),
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_infoPtr(0), _colorType(0), _channels(0) {}
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PngLoader::Status allocate();
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bool load();
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};
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#endif /* PSP_PNG_IMAGE_H */
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