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我試圖將.png文件作爲紋理加載到我的多維數據集。將.png文件作爲紋理加載到多維數據集ios
[self loadTexture:&myTexture fromFile:@"my_png.png"];
glEnable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE);
這是一個函數來加載它,但不幸它不起作用。
- (void)loadTexture:(GLuint *)newTextureName fromFile:(NSString *)fileName {
// Load image from file and get reference
UIImage *image = [[UIImage alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:fileName ofType:nil]];
CGImageRef imageRef = [image CGImage];
if(imageRef) {
// get width and height
size_t imageWidth = CGImageGetWidth(imageRef);
size_t imageHeight = CGImageGetHeight(imageRef);
GLubyte *imageData = (GLubyte *)malloc(imageWidth * imageHeight * 4);
memset(imageData, 0, (imageWidth * imageHeight * 4));
CGContextRef imageContextRef = CGBitmapContextCreate(imageData, imageWidth, imageHeight, 8, imageWidth * 4, CGImageGetColorSpace(imageRef), kCGImageAlphaPremultipliedLast);
// Make CG system interpret OpenGL style texture coordinates properly by inverting Y axis
CGContextTranslateCTM(imageContextRef, 0, imageHeight);
CGContextScaleCTM(imageContextRef, 1.0, -1.0);
CGContextDrawImage(imageContextRef, CGRectMake(0.0, 0.0, (CGFloat)imageWidth, (CGFloat)imageHeight), imageRef);
CGContextRelease(imageContextRef);
glGenTextures(1, newTextureName);
glBindTexture(GL_TEXTURE_2D, *newTextureName);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
free(imageData);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
}
你有什麼想法解決這個問題嗎?
歡迎來到Stack Overflow!通過更詳細地描述您的問題,您會得到更多/更好的答案。 *如何*它不起作用?與此同時,您可能需要查看使這一切變得更容易的'GLKTextureLoader'類。 – rickster