屏幕截图不会拍摄3D内容

我正在使用vuforia-sdk-ios-2-0-32。我在下面提到的截图链接（包括相机和3D内容）。 https://developer.vuforia.com/forum/ios/vuforia-sdk-how-take-screenshots，https://developer.vuforia.com/forum/ios/take-screenshot。但是我的代码只拍摄相机图像并保存到相册中，但它不会拍摄重叠内容（3D内容或图像）。屏幕截图不会拍摄3D内容

ARParentViewController.mm：

-(void)screenshot:(id)sender{ 

UIImage *outputImage = nil; 

     CGFloat scale = [[UIScreen mainScreen] scale]; 

    CGRect s = CGRectMake(0, 0, (768.0f) * scale, 1024.0f * scale); 

uint8_t *buffer = (uint8_t *) malloc(s.size.width * s.size.height * 4); 

glReadPixels(0, 0, s.size.width, s.size.height, GL_RGBA, GL_UNSIGNED_BYTE, buffer); 

    CGDataProviderRef ref = CGDataProviderCreateWithData(NULL, buffer, s.size.width * s.size.height * 4, NULL); 

    CGImageRef iref = CGImageCreate(s.size.width, s.size.height, 8, 32, s.size.width * 4, CGColorSpaceCreateDeviceRGB(), kCGBitmapByteOrderDefault, ref, NULL, true, kCGRenderingIntentDefault); 

    size_t width = CGImageGetWidth(iref); 

    size_t height = CGImageGetHeight(iref); 

    size_t length = width * height * 4; 

    uint32_t *pixels = (uint32_t *)malloc(length); 

    CGContextRef context = CGBitmapContextCreate(pixels, width, height, 8, width * 4, 

    CGImageGetColorSpace(iref), kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Big); 

    CGAffineTransform transform = CGAffineTransformIdentity; 

     transform = CGAffineTransformMakeTranslation(0.0f, height); 

     transform = CGAffineTransformScale(transform, 1.0, -1.0); 

     CGContextConcatCTM(context, transform); 

     CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, width, height), iref); 

     CGImageRef outputRef = CGBitmapContextCreateImage(context); 

    outputImage = [UIImage imageWithCGImage: outputRef]; 

     CGDataProviderRelease(ref); 

     CGImageRelease(iref); 

     CGContextRelease(context); 

     CGImageRelease(outputRef); 

     free(pixels); 

     free(buffer); 

    UIImageWriteToSavedPhotosAlbum(outputImage, nil, nil, nil); 

}

AR_EAGLView.mm：

eaglLayer.drawableProperties = @{ 

            kEAGLDrawablePropertyRetainedBacking: [NSNumber numberWithBool:YES], 

            kEAGLDrawablePropertyColorFormat: kEAGLColorFormatRGBA8, 

     };

来源

2014-04-04 user3496826

我在ImageTagetEAGlView用这个方法把图像与3D模型

- (void)savePhoto{ 

    UIGraphicsBeginImageContext(self.frame.size); 
    [self drawViewHierarchyInRect:self.frame afterScreenUpdates:YES]; 
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); 
}

注一起：我我正在使用Vuforia 4.0

来源

2015-05-05 11:04:39

屏幕截图不会拍摄3D内容

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