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Seams: added missing CIImageExtensions
git-svn-id: file://localhost/home/mikeash/svn/mikeash@47 1ea6ab17-982b-0410-b0ab-91172c90a6e5
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mikeash
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Aug 30, 2007
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| @@ -0,0 +1,29 @@ | ||
| // | ||
| // CIImageExtensions.h | ||
| // GreatPhoto | ||
| // | ||
| // Created by Ron Aldrich on 4/10/07. | ||
| // | ||
| // This source code is provided by Software Architects, Inc (Herein, SAI). on an | ||
| // "AS IS" basis. SAI MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT | ||
| // LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND | ||
| // FITNESS FOR A PARTICULAR PURPOSE, REGARDING THIS SOFTWARE OR ITS USE AND | ||
| // OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. | ||
| // | ||
| // IN NO EVENT SHALL SAI BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR | ||
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION | ||
| // AND/OR DISTRIBUTION OF THIS SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER | ||
| // THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, | ||
| // EVEN IF SAI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
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| #import <Cocoa/Cocoa.h> | ||
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| @interface CIImage (CIImageExtensions) | ||
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| - (float*) getRGBAfBitmap: (CGColorSpaceRef) inColorSpace | ||
| fromRect: (CGRect) inFromRect | ||
| rowBytes: (size_t*) outRowBytes; | ||
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| @end |
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| @@ -0,0 +1,142 @@ | ||
| // | ||
| // CIImageExtensions.m | ||
| // GreatPhoto | ||
| // | ||
| // Created by Ron Aldrich on 4/10/07. | ||
| // | ||
| // This source code is provided by Software Architects, Inc (Herein, SAI). on an | ||
| // "AS IS" basis. SAI MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT | ||
| // LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND | ||
| // FITNESS FOR A PARTICULAR PURPOSE, REGARDING THIS SOFTWARE OR ITS USE AND | ||
| // OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. | ||
| // | ||
| // IN NO EVENT SHALL SAI BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR | ||
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION | ||
| // AND/OR DISTRIBUTION OF THIS SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER | ||
| // THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, | ||
| // EVEN IF SAI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
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| #import "CIImageExtensions.h" | ||
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| #import <QuartzCore/QuartzCore.h> | ||
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| /******************************************************************************/ | ||
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| @interface CIImage (CIImageExtensionsPrivate) | ||
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| - (size_t) rowBytesForWidth: (size_t) inWidth | ||
| bytesPerPixel: (size_t) inBytesPerPixel; | ||
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| @end | ||
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| /******************************************************************************/ | ||
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| @implementation CIImage (CIImageExtensionsPrivate) | ||
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| /******************************************************************************/ | ||
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| - (size_t) rowBytesForWidth: (size_t) inWidth | ||
| bytesPerPixel: (size_t) inBytesPerPixel | ||
| { | ||
| size_t theResult = (inWidth * inBytesPerPixel + 15) & ~15; | ||
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| // Make sure we are not an even power of 2 wide. | ||
| // Will loop a few times for rowBytes <= 16. | ||
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| while ( 0 == (theResult & (theResult - 1) ) ) | ||
| theResult += 16; | ||
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| return theResult; | ||
| } | ||
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| /******************************************************************************/ | ||
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| @end | ||
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| /******************************************************************************/ | ||
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| @implementation CIImage (CIImageExtensions) | ||
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| /******************************************************************************/ | ||
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| - (float*) getRGBAfBitmap: (CGColorSpaceRef) inColorSpace | ||
| fromRect: (CGRect) inFromRect | ||
| rowBytes: (size_t*) outRowBytes | ||
| { | ||
| CGColorSpaceRef theColorSpace = nil; | ||
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| if ((inColorSpace == nil) || (inColorSpace == (CGColorSpaceRef) kCFNull)) | ||
| { | ||
| theColorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); | ||
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| NSParameterAssert(theColorSpace != nil); | ||
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| inColorSpace = theColorSpace; | ||
| } | ||
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| NSParameterAssert(outRowBytes != nil); | ||
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| size_t theDestWidth = ceilf(inFromRect.size.width); | ||
| size_t theDestHeight = ceilf(inFromRect.size.height); | ||
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| CGContextRef theCGContext = nil; | ||
| CIContext* theCIContext = nil; | ||
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| size_t theBitsPerComponent = 32; | ||
| size_t theBytesPerRow = [self rowBytesForWidth: theDestWidth | ||
| bytesPerPixel: 16]; | ||
| size_t theDataSize = theBytesPerRow * theDestHeight; | ||
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| float* theBitmapData = malloc(theDataSize); | ||
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| float* theTempPtr = theBitmapData; | ||
| unsigned theIndex; | ||
| for (theIndex = 0; theIndex < theDataSize; theIndex += sizeof(float)) | ||
| *theTempPtr++ = 0.555; | ||
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| NSParameterAssert(theBitmapData != nil); | ||
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| CGBitmapInfo theBitmapInfo = kCGBitmapFloatComponents | kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Host; | ||
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| theCGContext = CGBitmapContextCreate(theBitmapData, | ||
| theDestWidth, | ||
| theDestHeight, | ||
| theBitsPerComponent, | ||
| theBytesPerRow, | ||
| inColorSpace, | ||
| theBitmapInfo); | ||
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| NSParameterAssert(theCGContext != nil); | ||
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| NSDictionary* theCICContextOptions = [NSDictionary dictionaryWithObjectsAndKeys: | ||
| (id) inColorSpace, kCIContextOutputColorSpace, | ||
| (id) inColorSpace, kCIContextWorkingColorSpace, | ||
| nil]; | ||
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| theCIContext = [CIContext contextWithCGContext: theCGContext | ||
| options: theCICContextOptions]; | ||
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| NSParameterAssert(theCIContext != nil); | ||
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| CGContextClearRect(theCGContext, | ||
| CGRectMake(0, 0, theDestWidth, theDestHeight)); | ||
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| [theCIContext drawImage: self | ||
| atPoint: CGPointZero | ||
| fromRect: inFromRect]; | ||
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| CGContextFlush(theCGContext); | ||
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| *outRowBytes = CGBitmapContextGetBytesPerRow(theCGContext); | ||
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| CGContextRelease(theCGContext); | ||
| CGColorSpaceRelease(theColorSpace); | ||
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| return theBitmapData; | ||
| } | ||
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| /******************************************************************************/ | ||
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| @end |
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