我用以下代码加载纹理:
- (void)loadTexture:(UIImage *)textureImage
{
glGenTextures(1, &_texture);
glBindTexture(GL_TEXTURE_2D, _texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
CGImageRef cgImage = textureImage.CGImage;
float imageWidth = CGImageGetWidth(cgImage);
float imageHeight = CGImageGetHeight(cgImage);
CFDataRef data = CGDataProviderCopyData(CGImageGetDataProvider(cgImage));
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, 0, GL_RGBA,
GL_UNSIGNED_BYTE, CFDataGetBytePtr(data));
}
模拟器中的图像:
在设备上运行相同的代码会产生以下输出:
我是否漏掉了什么?