가로 화면 캡처 세로 모드 화면을 반환합니다.

Question

세로 모드에서 카메라를 누른 다음 세로 모드를 반환하는 스냅 샷을 찍으면 나는 openGL 스크린 샷을 찍고 있습니다. 그러나 세로 모드에서 카메라를 가로 모드로 돌린 다음 스크린 샷을 찍으면 세로 모드 스크린 샷 만 반환됩니다. 하지만 내 카메라보기에서는 라이브 스트림 풀 모드와 스크린 샷 저장 1024X768을 보여줍니다.

ImageTargetsEAGLView.mm :

- (BOOL)presentFramebuffer 

{ 

    if (_takePhotoFlag1) 

{ 

    [self glToUIImage1]; 

    UIImageWriteToSavedPhotosAlbum([self glToUIImage1], nil, nil, nil); 

     NSLog(@"Screenshot size: %d, %d", (int)[[self glToUIImage1] size].width, (int)[[self glToUIImage1] size].height); 

_takePhotoFlag1 = NO; 

    }  

     // setFramebuffer must have been called before presentFramebuffer, therefore 

    // we know the context is valid and has been set for this (render) thread 



    // Bind the colour render buffer and present it 

    glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer); 



    return [context presentRenderbuffer:GL_RENDERBUFFER]; 

} 





- (UIImage*) glToUIImage1 

{ 

UIImage *outputImage = nil; 



    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation; 

     if (UIInterfaceOrientationIsLandscape(orientation)) 

     { 

      NSLog(@"landscape screen"); 

      CGRect screenBounds = [[UIScreen mainScreen] bounds]; 

    // CGFloat scale = [[UIScreen mainScreen] scale]; 

      // CGRect s = CGRectMake(0, 0, 320.0f * scale, 480.0f * scale); 

       CGRect s = CGRectMake(0, 0, 1024 , 768); 

      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 context1 = 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(context1, transform); 

      CGContextDrawImage(context1, CGRectMake(0.0f, 0.0f, width, height), iref); 

      CGImageRef outputRef = CGBitmapContextCreateImage(context1); 

       outputImage = [UIImage imageWithCGImage: outputRef]; 

      CGDataProviderRelease(ref); 

      CGImageRelease(iref); 

      CGContextRelease(context1); 

      CGImageRelease(outputRef); 

      free(pixels); 

      free(buffer); 



     }else{ 



     NSLog(@"portrait screen"); 



     // CGFloat scale = [[UIScreen mainScreen] scale]; 

      // CGRect s = CGRectMake(0, 0, 320.0f * scale, 480.0f * scale); 



      CGRect s = CGRectMake(0, 0, 768, 1024); 



      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 context1 = 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(context1, transform); 

      CGContextDrawImage(context1, CGRectMake(0.0f, 0.0f, width, height), iref); 

      CGImageRef outputRef = CGBitmapContextCreateImage(context1); 





      outputImage = [UIImage imageWithCGImage: outputRef]; 



      CGDataProviderRelease(ref); 

      CGImageRelease(iref); 

      CGContextRelease(context1); 

      CGImageRelease(outputRef); 

      free(pixels); 

      free(buffer); 





     } 





     return outputImage; 



    } 



} 

Answer 1

나는 당신이 당신의 코드와 같은 문제가없는,하지만 난 방법은 여기 내가 사용 제안 등 아티팩트를받을 수 있나요 : http://www.unagames.com/blog/daniele/2011/10/opengl-es-screenshots-ios 그것은 일 완벽하게 당신을위한 드롭 인 대체품 (GLKViewController를 사용하는 경우 eaglview로 self.view를 제공) 실제로 OpenGL ES 컨텍스트에서 SS에 대한 정확한 크기를 가져오고 있으므로 항상 올바른 ^^