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271 lines
8.2 KiB
271 lines
8.2 KiB
/*
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* Copyright (c) 2010-2014 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "image.h"
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#include <framework/core/resourcemanager.h>
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#include <framework/core/filestream.h>
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#include <framework/graphics/apngloader.h>
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Image::Image(const Size& size, int bpp, uint8 *pixels)
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{
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m_size = size;
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m_bpp = bpp;
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m_pixels.resize(size.area() * bpp, 0);
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if(pixels)
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memcpy(&m_pixels[0], pixels, m_pixels.size());
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}
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ImagePtr Image::load(std::string file)
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{
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ImagePtr image;
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try {
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file = g_resources.guessFilePath(file, "png");
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// load image file data
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image = loadPNG(file);
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} catch(stdext::exception& e) {
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g_logger.error(stdext::format("unable to load image '%s': %s", file, e.what()));
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}
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return image;
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}
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ImagePtr Image::loadPNG(const std::string& file)
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{
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std::stringstream fin;
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g_resources.readFileStream(file, fin);
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ImagePtr image;
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apng_data apng;
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if(load_apng(fin, &apng) == 0) {
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image = ImagePtr(new Image(Size(apng.width, apng.height), apng.bpp, apng.pdata));
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free_apng(&apng);
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}
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return image;
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}
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void Image::savePNG(const std::string& fileName)
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{
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FileStreamPtr fin = g_resources.createFile(fileName);
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if(!fin)
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stdext::throw_exception(stdext::format("failed to open file '%s' for write", fileName));
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fin->cache();
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std::stringstream data;
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save_png(data, m_size.width(), m_size.height(), 4, (unsigned char*)getPixelData());
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fin->write(data.str().c_str(), data.str().length());
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fin->flush();
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fin->close();
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}
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void Image::overwriteMask(const Color& maskedColor, const Color& insideColor, const Color& outsideColor)
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{
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assert(m_bpp == 4);
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for(int p=0;p<getPixelCount();p++) {
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uint8& r = m_pixels[p*4 + 0];
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uint8& g = m_pixels[p*4 + 1];
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uint8& b = m_pixels[p*4 + 2];
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uint8& a = m_pixels[p*4 + 3];
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Color pixelColor(r,g,b,a);
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Color writeColor = (pixelColor == maskedColor) ? insideColor : outsideColor;
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r = writeColor.r();
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g = writeColor.g();
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b = writeColor.b();
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a = writeColor.a();
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}
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}
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void Image::blit(const Point& dest, const ImagePtr& other)
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{
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assert(m_bpp == 4);
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if(!other)
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return;
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uint8* otherPixels = other->getPixelData();
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for(int p = 0; p < other->getPixelCount(); ++p) {
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int x = p % other->getWidth();
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int y = p / other->getWidth();
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int pos = ((dest.y + y) * m_size.width() + (dest.x + x)) * 4;
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if (otherPixels[p*4+3] != 0) {
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m_pixels[pos+0] = otherPixels[p*4+0];
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m_pixels[pos+1] = otherPixels[p*4+1];
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m_pixels[pos+2] = otherPixels[p*4+2];
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m_pixels[pos+3] = otherPixels[p*4+3];
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}
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}
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}
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void Image::paste(const ImagePtr& other)
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{
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assert(m_bpp == 4);
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if(!other)
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return;
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uint8* otherPixels = other->getPixelData();
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for(int p = 0; p < other->getPixelCount(); ++p) {
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int x = p % other->getWidth();
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int y = p / other->getWidth();
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int pos = (y * m_size.width() + x) * 4;
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m_pixels[pos+0] = otherPixels[p*4+0];
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m_pixels[pos+1] = otherPixels[p*4+1];
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m_pixels[pos+2] = otherPixels[p*4+2];
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m_pixels[pos+3] = otherPixels[p*4+3];
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}
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}
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bool Image::nextMipmap()
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{
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assert(m_bpp == 4);
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assert(stdext::is_power_of_two(m_size.width()) && stdext::is_power_of_two(m_size.height()));
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int iw = m_size.width();
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int ih = m_size.height();
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if(iw == 1 && ih == 1)
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return false;
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int ow = iw > 1 ? iw/2 : 1;
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int oh = ih > 1 ? ih/2 : 1;
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std::vector<uint8> pixels(ow*oh*4, 0xFF);
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//FIXME: calculate mipmaps for 8x1, 4x1, 2x1 ...
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if(iw != 1 && ih != 1) {
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for(int x=0;x<ow;++x) {
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for(int y=0;y<oh;++y) {
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uint8 *inPixel[4];
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inPixel[0] = &m_pixels[((y*2)*iw + (x*2))*4];
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inPixel[1] = &m_pixels[((y*2)*iw + (x*2)+1)*4];
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inPixel[2] = &m_pixels[((y*2+1)*iw + (x*2))*4];
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inPixel[3] = &m_pixels[((y*2+1)*iw + (x*2)+1)*4];
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uint8 *outPixel = &pixels[(y*ow + x)*4];
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int pixelsSum[4];
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for(int i=0;i<4;++i)
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pixelsSum[i] = 0;
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int usedPixels = 0;
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for(int j=0;j<4;++j) {
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// ignore colors of complete alpha pixels
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if(inPixel[j][3] < 16)
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continue;
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for(int i=0;i<4;++i)
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pixelsSum[i] += inPixel[j][i];
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usedPixels++;
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}
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// try to guess the alpha pixel more accurately
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for(int i=0;i<4;++i) {
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if(usedPixels > 0)
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outPixel[i] = pixelsSum[i] / usedPixels;
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else
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outPixel[i] = 0;
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}
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outPixel[3] = pixelsSum[3]/4;
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}
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}
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}
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m_pixels = pixels;
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m_size = Size(ow, oh);
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return true;
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}
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/*
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*
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void Texture::generateSoftwareMipmaps(std::vector<uint8> inPixels)
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{
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bind();
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assert(stdext::is_power_of_two(m_glSize.width()) && stdext::is_power_of_two(m_glSize.height()));
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Size inSize = m_glSize;
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Size outSize = inSize / 2;
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std::vector<uint8> outPixels;
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int mipmap = 1;
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while(true) {
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outPixels.resize(outSize.area()*4, 0);
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// this is a simple bilinear filtering algorithm, it combines every 4 pixels in one pixel
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for(int x=0;x<outSize.width();++x) {
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for(int y=0;y<outSize.height();++y) {
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uint8 *inPixel[4];
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inPixel[0] = &inPixels[((y*2)*inSize.width() + (x*2))*4];
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inPixel[1] = &inPixels[((y*2)*inSize.width() + (x*2)+1)*4];
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inPixel[2] = &inPixels[((y*2+1)*inSize.width() + (x*2))*4];
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inPixel[3] = &inPixels[((y*2+1)*inSize.width() + (x*2)+1)*4];
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uint8 *outPixel = &outPixels[(y*outSize.width() + x)*4];
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int pixelsSum[4];
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for(int i=0;i<4;++i)
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pixelsSum[i] = 0;
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int usedPixels = 0;
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for(int j=0;j<4;++j) {
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// ignore colors of complete alpha pixels
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if(inPixel[j][3] < 16)
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continue;
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for(int i=0;i<4;++i)
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pixelsSum[i] += inPixel[j][i];
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usedPixels++;
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}
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// try to guess the alpha pixel more accurately
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for(int i=0;i<4;++i) {
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if(usedPixels > 0)
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outPixel[i] = pixelsSum[i] / usedPixels;
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else
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outPixel[i] = 0;
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}
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outPixel[3] = pixelsSum[3]/4;
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}
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}
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glTexImage2D(GL_TEXTURE_2D, mipmap++, GL_RGBA, outSize.width(), outSize.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, &outPixels[0]);
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if(inSize.width() == 1 || inSize.height() == 1)
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break;
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inPixels = std::move(outPixels);
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inSize /= 2;
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outSize /= 2;
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}
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if(!m_hasMipmaps) {
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m_hasMipmaps = true;
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setupFilters();
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}
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}
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*/
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