Can someone explain how this png loader works? I just want to know how to use it.
The function is pretty self explanitory... just look at the function name and commented description:
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/** loadTexture
* loads a png file into an opengl texture object, using cstdio , libpng, and opengl.
*
* \param filename : the png file to be loaded
* \param width : width of png, to be updated as a side effect of this function
* \param height : height of png, to be updated as a side effect of this function
*
* \return GLuint : an opengl texture id. Will be 0 if there is a major error,
* should be validated by the client of this function.
*
*/
GLuint loadTexture(const string filename, int &width, int &height)
Example usage:
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int width = 0;
int height = 0;
GLuint texture = loadTexture( "name of your file.png", width, height );
if(!texture)
{
// the load failed
}
else
{
// the load succeeded.
// 'texture' contains the OpenGL ID for the texture (ie, what you use with glBindTexture)
// 'width' contains the width of the texture
// 'height contains the height
}
