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POIs there anything wrong with my texture loading method?
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  1. POIs there anything wrong with my texture loading method?
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    copied!<p>I'm a noob in openGL and trying to learn as much as possible. I'm using this method to load my openGL textures, loading every .png as RGBA4444. I'm doing anything incorrect ?</p> <pre><code>- (void)loadTexture:(NSString*)nombre { CGImageRef textureImage =[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:nombre ofType:nil]].CGImage; if (textureImage == nil) { NSLog(@"Failed to load texture image"); return; } textureWidth = NextPowerOfTwo(CGImageGetWidth(textureImage)); textureHeight = NextPowerOfTwo(CGImageGetHeight(textureImage)); imageSizeX= CGImageGetWidth(textureImage); imageSizeY= CGImageGetHeight(textureImage); GLubyte *textureData = (GLubyte *)calloc(1,textureWidth * textureHeight * 4); // Por 4 pues cada pixel necesita 4 bytes, RGBA CGContextRef textureContext = CGBitmapContextCreate(textureData, textureWidth,textureHeight,8, textureWidth * 4,CGImageGetColorSpace(textureImage),kCGImageAlphaPremultipliedLast ); CGContextDrawImage(textureContext, CGRectMake(0.0, 0.0, (float)textureWidth, (float)textureHeight), textureImage); //Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRGGGGBBBBAAAA" void *tempData = malloc(textureWidth * textureHeight * 2); unsigned int* inPixel32 = (unsigned int*)textureData; unsigned short* outPixel16 = (unsigned short*)tempData; for(int i = 0; i &lt; textureWidth * textureHeight ; ++i, ++inPixel32) *outPixel16++ = ((((*inPixel32 &gt;&gt; 0) &amp; 0xFF) &gt;&gt; 4) &lt;&lt; 12) | // R ((((*inPixel32 &gt;&gt; 8) &amp; 0xFF) &gt;&gt; 4) &lt;&lt; 8) | // G ((((*inPixel32 &gt;&gt; 16) &amp; 0xFF) &gt;&gt; 4) &lt;&lt; 4) | // B ((((*inPixel32 &gt;&gt; 24) &amp; 0xFF) &gt;&gt; 4) &lt;&lt; 0); // A free(textureData); textureData = tempData; CGContextRelease(textureContext); glGenTextures(1, &amp;textures[0]); glBindTexture(GL_TEXTURE_2D, textures[0]); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeight, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4 , textureData); free(textureData); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); } </code></pre> <p>And this is my dealloc method:</p> <pre><code>- (void)dealloc { glDeleteTextures(1,textures); [super dealloc]; } </code></pre>
 

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