2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
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29 #include "BitmapImage.h"
30 #include "BitmapInfo.h"
31 #include "GraphicsContextCG.h"
32 #include "PlatformString.h"
33 #include <ApplicationServices/ApplicationServices.h>
35 #include <wtf/RetainPtr.h>
39 PassRefPtr<BitmapImage> BitmapImage::create(HBITMAP hBitmap)
41 DIBSECTION dibSection;
42 if (!GetObject(hBitmap, sizeof(DIBSECTION), &dibSection))
45 ASSERT(dibSection.dsBm.bmBitsPixel == 32);
46 if (dibSection.dsBm.bmBitsPixel != 32)
49 ASSERT(dibSection.dsBm.bmBits);
50 if (!dibSection.dsBm.bmBits)
53 RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(dibSection.dsBm.bmBits, dibSection.dsBm.bmWidth, dibSection.dsBm.bmHeight, 8,
54 dibSection.dsBm.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
56 // The BitmapImage takes ownership of this.
57 CGImageRef cgImage = CGBitmapContextCreateImage(bitmapContext.get());
59 return adoptRef(new BitmapImage(cgImage));
62 bool BitmapImage::getHBITMAPOfSize(HBITMAP bmp, LPSIZE size)
67 GetObject(bmp, sizeof(BITMAP), &bmpInfo);
69 ASSERT(bmpInfo.bmBitsPixel == 32);
70 int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
72 CGContextRef cgContext = CGBitmapContextCreate(bmpInfo.bmBits, bmpInfo.bmWidth, bmpInfo.bmHeight,
73 8, bmpInfo.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
75 GraphicsContext gc(cgContext);
77 IntSize imageSize = BitmapImage::size();
79 drawFrameMatchingSourceSize(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), IntSize(*size), ColorSpaceDeviceRGB, CompositeCopy);
81 draw(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), ColorSpaceDeviceRGB, CompositeCopy);
84 CGContextRelease(cgContext);
89 void BitmapImage::drawFrameMatchingSourceSize(GraphicsContext* ctxt, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator compositeOp)
91 size_t frames = frameCount();
92 for (size_t i = 0; i < frames; ++i) {
93 CGImageRef image = frameAtIndex(i);
94 if (CGImageGetHeight(image) == static_cast<size_t>(srcSize.height()) && CGImageGetWidth(image) == static_cast<size_t>(srcSize.width())) {
95 size_t currentFrame = m_currentFrame;
97 draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, srcSize.width(), srcSize.height()), styleColorSpace, compositeOp);
98 m_currentFrame = currentFrame;
103 // No image of the correct size was found, fallback to drawing the current frame
104 IntSize imageSize = BitmapImage::size();
105 draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), styleColorSpace, compositeOp);
108 } // namespace WebCore