Method ActuallyLoadImage

neo/renderer/Image_load.cpp:1643–1731

=============== ActuallyLoadImage Absolutely every image goes through this path On exit, the idImage will have a valid OpenGL texture number that can be bound =============== */

===============
*/
void	idImage::ActuallyLoadImage( bool checkForPrecompressed, bool fromBackEnd ) {
	int		width, height;
	byte	*pic;

	// this is the ONLY place generatorFunction will ever be called
	if ( generatorFunction ) {
		generatorFunction( this );
		return;
	}

	// if we are a partial image, we are only going to load from a compressed file
	if ( isPartialImage ) {
		if ( CheckPrecompressedImage( false ) ) {
			return;
		}
		// this is an error -- the partial image failed to load
		MakeDefault();
		return;
	}

	//
	// load the image from disk
	//
	if ( cubeFiles != CF_2D ) {
		byte	*pics[6];

		// we don't check for pre-compressed cube images currently
		R_LoadCubeImages( imgName, cubeFiles, pics, &width, &timestamp );

		if ( pics[0] == NULL ) {
			common->Warning( "Couldn't load cube image: %s", imgName.c_str() );
			MakeDefault();
			return;
		}

		GenerateCubeImage( (const byte **)pics, width, filter, allowDownSize, depth );
		precompressedFile = false;

		for ( int i = 0 ; i < 6 ; i++ ) {
			if ( pics[i] ) {
				R_StaticFree( pics[i] );
			}
		}
	} else {
		// see if we have a pre-generated image file that is
		// already image processed and compressed
		if ( checkForPrecompressed && globalImages->image_usePrecompressedTextures.GetBool() ) {
			if ( CheckPrecompressedImage( true ) ) {
				// we got the precompressed image
				return;
			}
			// fall through to load the normal image
		}

		R_LoadImageProgram( imgName, &pic, &width, &height, &timestamp, &depth );

		if ( pic == NULL ) {
			common->Warning( "Couldn't load image: %s", imgName.c_str() );