Merge pull request #1063 from alekcac:conversion

modules/highgui/CMakeLists.txt

@@ -234,7 +234,7 @@ endif()
 
 if(IOS)
   add_definitions(-DHAVE_IOS=1)
-  list(APPEND highgui_srcs src/cap_ios_abstract_camera.mm src/cap_ios_photo_camera.mm src/cap_ios_video_camera.mm)
+  list(APPEND highgui_srcs src/ios_conversions.mm src/cap_ios_abstract_camera.mm src/cap_ios_photo_camera.mm src/cap_ios_video_camera.mm)
   list(APPEND HIGHGUI_LIBRARIES "-framework Accelerate" "-framework AVFoundation" "-framework CoreGraphics" "-framework CoreImage" "-framework CoreMedia" "-framework CoreVideo" "-framework QuartzCore" "-framework AssetsLibrary")
 endif()
 

modules/highgui/include/opencv2/highgui/ios.h

@@ -0,0 +1,49 @@
+
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                          License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "opencv2/core/core.hpp"
+#import "opencv2/highgui/cap_ios.h"
+
+UIImage* MatToUIImage(const cv::Mat& image);
+void UIImageToMat(const UIImage* image,
+                         cv::Mat& m, bool alphaExist = false);

modules/highgui/src/ios_conversions.mm

@@ -0,0 +1,117 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                          License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#import "opencv2/highgui/cap_ios.h"
+#include "precomp.hpp"
+
+UIImage* MatToUIImage(const cv::Mat& image) {
+    
+    NSData *data = [NSData dataWithBytes:image.data
+                                  length:image.elemSize()*image.total()];
+    
+    CGColorSpaceRef colorSpace;
+    
+    if (image.elemSize() == 1) {
+        colorSpace = CGColorSpaceCreateDeviceGray();
+    } else {
+        colorSpace = CGColorSpaceCreateDeviceRGB();
+    }
+    
+    CGDataProviderRef provider =
+            CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
+    
+    // Creating CGImage from cv::Mat
+    CGImageRef imageRef = CGImageCreate(image.cols,
+                                        image.rows,
+                                        8,
+                                        8 * image.elemSize(),
+                                        image.step.p[0],
+                                        colorSpace,
+                                        kCGImageAlphaNone|
+                                        kCGBitmapByteOrderDefault,
+                                        provider,
+                                        NULL,
+                                        false,
+                                        kCGRenderingIntentDefault
+                                        );
+    
+    
+    // Getting UIImage from CGImage
+    UIImage *finalImage = [UIImage imageWithCGImage:imageRef];
+    CGImageRelease(imageRef);
+    CGDataProviderRelease(provider);
+    CGColorSpaceRelease(colorSpace);
+    
+    return finalImage;
+}
+
+void UIImageToMat(const UIImage* image,
+                         cv::Mat& m, bool alphaExist) {
+    CGColorSpaceRef colorSpace = CGImageGetColorSpace(image.CGImage);
+    CGFloat cols = image.size.width, rows = image.size.height;
+    CGContextRef contextRef;
+    CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedLast;
+    if (CGColorSpaceGetModel(colorSpace) == 0)
+    {
+        m.create(rows, cols, CV_8UC1); // 8 bits per component, 1 channel
+        bitmapInfo = kCGImageAlphaNone;
+        if (!alphaExist)
+            bitmapInfo = kCGImageAlphaNone;
+        contextRef = CGBitmapContextCreate(m.data, m.cols, m.rows, 8,
+                                           m.step[0], colorSpace,
+                                           bitmapInfo);
+    }
+    else
+    {
+        m.create(rows, cols, CV_8UC4); // 8 bits per component, 4 channels
+        if (!alphaExist)
+            bitmapInfo = kCGImageAlphaNoneSkipLast |
+                                kCGBitmapByteOrderDefault;
+        contextRef = CGBitmapContextCreate(m.data, m.cols, m.rows, 8,
+                                           m.step[0], colorSpace,
+                                           bitmapInfo);
+    }
+    CGContextDrawImage(contextRef, CGRectMake(0, 0, cols, rows),
+                       image.CGImage);
+    CGContextRelease(contextRef);
+    CGColorSpaceRelease(colorSpace);
+}