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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "Image.h"
     28 #include "BitmapImage.h"
     29 #include "BitmapInfo.h"
     30 #include "GraphicsContext.h"
     31 #include <ApplicationServices/ApplicationServices.h>
     32 
     33 #include <windows.h>
     34 #include "PlatformString.h"
     35 
     36 namespace WebCore {
     37 
     38 PassRefPtr<BitmapImage> BitmapImage::create(HBITMAP hBitmap)
     39 {
     40     DIBSECTION dibSection;
     41     if (!GetObject(hBitmap, sizeof(DIBSECTION), &dibSection))
     42         return 0;
     43 
     44     ASSERT(dibSection.dsBm.bmBitsPixel == 32);
     45     if (dibSection.dsBm.bmBitsPixel != 32)
     46         return 0;
     47 
     48     ASSERT(dibSection.dsBm.bmBits);
     49     if (!dibSection.dsBm.bmBits)
     50         return 0;
     51 
     52     RetainPtr<CGColorSpaceRef> deviceRGB(AdoptCF, CGColorSpaceCreateDeviceRGB());
     53     RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(dibSection.dsBm.bmBits, dibSection.dsBm.bmWidth, dibSection.dsBm.bmHeight, 8,
     54         dibSection.dsBm.bmWidthBytes, deviceRGB.get(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
     55 
     56     // The BitmapImage takes ownership of this.
     57     CGImageRef cgImage = CGBitmapContextCreateImage(bitmapContext.get());
     58 
     59     return adoptRef(new BitmapImage(cgImage));
     60 }
     61 
     62 bool BitmapImage::getHBITMAPOfSize(HBITMAP bmp, LPSIZE size)
     63 {
     64     ASSERT(bmp);
     65 
     66     BITMAP bmpInfo;
     67     GetObject(bmp, sizeof(BITMAP), &bmpInfo);
     68 
     69     ASSERT(bmpInfo.bmBitsPixel == 32);
     70     int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
     71 
     72     CGColorSpaceRef deviceRGB = CGColorSpaceCreateDeviceRGB();
     73     CGContextRef cgContext = CGBitmapContextCreate(bmpInfo.bmBits, bmpInfo.bmWidth, bmpInfo.bmHeight,
     74         8, bmpInfo.bmWidthBytes, deviceRGB, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
     75 
     76     GraphicsContext gc(cgContext);
     77 
     78     IntSize imageSize = BitmapImage::size();
     79     if (size)
     80         drawFrameMatchingSourceSize(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), IntSize(*size), DeviceColorSpace, CompositeCopy);
     81     else
     82         draw(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), DeviceColorSpace, CompositeCopy);
     83 
     84     // Do cleanup
     85     CGContextRelease(cgContext);
     86     CGColorSpaceRelease(deviceRGB);
     87 
     88     return true;
     89 }
     90 
     91 void BitmapImage::drawFrameMatchingSourceSize(GraphicsContext* ctxt, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator compositeOp)
     92 {
     93     size_t frames = frameCount();
     94     for (size_t i = 0; i < frames; ++i) {
     95         CGImageRef image = frameAtIndex(i);
     96         if (CGImageGetHeight(image) == static_cast<size_t>(srcSize.height()) && CGImageGetWidth(image) == static_cast<size_t>(srcSize.width())) {
     97             size_t currentFrame = m_currentFrame;
     98             m_currentFrame = i;
     99             draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, srcSize.width(), srcSize.height()), styleColorSpace, compositeOp);
    100             m_currentFrame = currentFrame;
    101             return;
    102         }
    103     }
    104 
    105     // No image of the correct size was found, fallback to drawing the current frame
    106     IntSize imageSize = BitmapImage::size();
    107     draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), styleColorSpace, compositeOp);
    108 }
    109 
    110 } // namespace WebCore
    111