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C-/C++-Quelltext

void ParallaxTest::SaveTextureToTGA(GLuint texture, char *filename)
{
glBindTexture(GL_TEXTURE_2D, texture);

int width, height, format;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&width);
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&height);
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_INTERNAL_FORMAT,&format);

unsigned char *outputImage = 0;

// Allocate the neccessary memory.
outputImage = (unsigned char*)malloc(width * height * 3);

// Clear the variable.
memset(outputImage, 0, width * height * 3);

glGetTexImage(GL_TEXTURE_2D, 0, format, GL_UNSIGNED_BYTE, outputImage);

// Call our WriteTGA() function to write the tga.
WriteTGA(filename, width, height, (unsigned char*)outputImage);

// Clear the allocated memory.
free(outputImage);
}

C-/C++-Quelltext

void ParallaxTest::SaveTextureToPNG(GLuint texture, std::string Filename)
{
glBindTexture(GL_TEXTURE_2D, texture);

int textureWidth, textureHeight, textureInternalFormat;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&textureWidth);
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&textureHeight);
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_INTERNAL_FORMAT,&textureInternalFormat);

std::vector<unsigned char> TexData, PngData;

int Pack;
glGetIntegerv(GL_PACK_ALIGNMENT, &Pack);
TexData.resize(textureWidth*textureHeight*4);

glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &TexData[0]);

LodePNG::Encoder encoder;
encoder.encode(PngData, TexData, textureHeight, textureWidth);
LodePNG::saveFile(PngData, Filename);
}