Загрузка текстуры opengl objective C

Помогите пожалуйста найти ошибку. Вот код: GLuint amp;
CGImageRef textureImage = [UIImage imageNamed:@«arrow_left.png»].CGImage;
if (textureImage == nil) {
NSLog(@«Failed to load texture image»);
return;
}
NSInteger texWidth = CGImageGetWidth(textureImage);
NSInteger texHeight = CGImageGetHeight(textureImage);
GLubyte *textureData = (GLubyte *)malloc(texWidth * texHeight * 4);
CGContextRef textureContext = CGBitmapContextCreate( textureData, texWidth, texHeight, 8, texWidth * 4, CGImageGetColorSpace(textureImage), kCGImageAlphaPremultipliedLast); GLuint textures[10];
CGContextDrawImage(textureContext, CGRectMake(0.0, 0.0, (float)texWidth, (float)texHeight), textureImage);
CGContextRelease(textureContext);
glGenTextures(1, &amp);
glBindTexture(GL_TEXTURE_2D, textures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texWidth, texHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, textureData);
free(textureData);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glEnable(GL_TEXTURE_2D);
const GLfloat squareVertices[] = {
-1.0, 1.0, 0.0,
-1.0, -1.0, 0.0,
1.0, -1.0, 0.0,
1.0, 1.0, 0.0 };
const GLshort squareTextureCoords[] = {
0, 1,
0, 0,
1, 0,
1, 1
};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrthof(-3.0, 3.0,-4.5 , 4.5, -4.0,4.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glColor4f(0.0, 1.0, 1.0, 1.0);
//glTranslatef(1.5, 0.0, -6.0);
//glRotatef(30, 0.0, 0.0, 1.0);
glVertexPointer(3, GL_FLOAT, 0, squareVertices);
glEnableClientState(GL_VERTEX_ARRAY);
glTexCoordPointer(2, GL_SHORT, 0, squareTextureCoords);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_SHORT, 0, squareTextureCoords);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);

Всем заранее спасибо!