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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.
*
*/
/*
* This code is based on Broken Sword 2.5 engine
*
* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
*
* Licensed under GNU GPL v2
*
*/
#include "common/memstream.h"
#include "sword25/gfx/image/image.h"
#include "sword25/gfx/image/imgloader.h"
#include "graphics/pixelformat.h"
#include "graphics/decoders/png.h"
namespace Sword25 {
bool ImgLoader::decodePNGImage(const byte *fileDataPtr, uint fileSize, byte *&uncompressedDataPtr, int &width, int &height, int &pitch) {
Common::MemoryReadStream *fileStr = new Common::MemoryReadStream(fileDataPtr, fileSize, DisposeAfterUse::NO);
Graphics::PNGDecoder png;
if (!png.loadStream(*fileStr)) // the fileStr pointer, and thus pFileData will be deleted after this is done
error("Error while reading PNG image");
const Graphics::Surface *sourceSurface = png.getSurface();
Graphics::Surface *pngSurface = sourceSurface->convertTo(Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24), png.getPalette());
width = pngSurface->w;
height = pngSurface->h;
uncompressedDataPtr = new byte[pngSurface->pitch * pngSurface->h];
memcpy(uncompressedDataPtr, (byte *)pngSurface->pixels, pngSurface->pitch * pngSurface->h);
pngSurface->free();
delete pngSurface;
delete fileStr;
// Signal success
return true;
}
bool ImgLoader::decodeThumbnailImage(const byte *pFileData, uint fileSize, byte *&pUncompressedData, int &width, int &height, int &pitch) {
const byte *src = pFileData + 4; // skip header
width = READ_LE_UINT16(src); src += 2;
height = READ_LE_UINT16(src); src += 2;
src++; // version, ignored for now
pitch = width * 4;
uint32 totalSize = pitch * height;
pUncompressedData = new byte[totalSize];
uint32 *dst = (uint32 *)pUncompressedData; // treat as uint32, for pixelformat output
const Graphics::PixelFormat format = Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24);
byte r, g, b;
for (uint32 i = 0; i < totalSize / 4; i++) {
r = *src++;
g = *src++;
b = *src++;
*dst++ = format.RGBToColor(r, g, b);
}
return true;
}
} // End of namespace Sword25
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