Merge r120507 to chromium 1132 branch.

WebCore/platform/graphics/chromium/PlatformImage.cpp

-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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.
- */
-
-#include "config.h"
-
-#include "PlatformImage.h"
-
-#if USE(SKIA)
-#include "NativeImageSkia.h"
-#include "PlatformContextSkia.h"
-#elif USE(CG)
-#include <CoreGraphics/CGBitmapContext.h>
-#include <CoreGraphics/CGContext.h>
-#include <CoreGraphics/CGImage.h>
-#include <wtf/RetainPtr.h>
-#else
-#error "Need to implement for your platform"
-#endif
-
-namespace WebCore {
-
-PlatformImage::PlatformImage()
-{
-}
-
-void PlatformImage::updateFromImage(NativeImagePtr nativeImage)
-{
-#if USE(SKIA)
-    // The layer contains an Image.
-    NativeImageSkia* skiaImage = static_cast<NativeImageSkia*>(nativeImage);
-    ASSERT(skiaImage);
-    const SkBitmap& skiaBitmap = skiaImage->bitmap();
-
-    IntSize bitmapSize(skiaBitmap.width(), skiaBitmap.height());
-#elif USE(CG)
-    // NativeImagePtr is a CGImageRef on Mac OS X.
-    int width = CGImageGetWidth(nativeImage);
-    int height = CGImageGetHeight(nativeImage);
-    IntSize bitmapSize(width, height);
-#endif
-
-    size_t bufferSize = bitmapSize.width() * bitmapSize.height() * 4;
-    if (m_size != bitmapSize) {
-        m_pixelData = adoptArrayPtr(new uint8_t[bufferSize]);
-        memset(m_pixelData.get(), 0, bufferSize);
-        m_size = bitmapSize;
-    }
-
-#if USE(SKIA)
-    SkAutoLockPixels lock(skiaBitmap);
-    // FIXME: do we need to support more image configurations?
-    ASSERT(skiaBitmap.config()== SkBitmap::kARGB_8888_Config);
-    skiaBitmap.copyPixelsTo(m_pixelData.get(), bufferSize);
-#elif USE(CG)
-    // FIXME: we should get rid of this temporary copy where possible.
-    int tempRowBytes = width * 4;
-    // Note we do not zero this vector since we are going to
-    // completely overwrite its contents with the image below.
-    // Try to reuse the color space from the image to preserve its colors.
-    // Some images use a color space (such as indexed) unsupported by the bitmap context.
-    RetainPtr<CGColorSpaceRef> colorSpaceReleaser;
-    CGColorSpaceRef colorSpace = CGImageGetColorSpace(nativeImage);
-    CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
-    switch (colorSpaceModel) {
-    case kCGColorSpaceModelMonochrome:
-    case kCGColorSpaceModelRGB:
-    case kCGColorSpaceModelCMYK:
-    case kCGColorSpaceModelLab:
-    case kCGColorSpaceModelDeviceN:
-        break;
-    default:
-        colorSpaceReleaser.adoptCF(CGColorSpaceCreateDeviceRGB());
-        colorSpace = colorSpaceReleaser.get();
-        break;
-    }
-    RetainPtr<CGContextRef> tempContext(AdoptCF, CGBitmapContextCreate(m_pixelData.get(),
-                                                                       width, height, 8, tempRowBytes,
-                                                                       colorSpace,
-                                                                       kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
-    CGContextSetBlendMode(tempContext.get(), kCGBlendModeCopy);
-    CGContextDrawImage(tempContext.get(),
-                       CGRectMake(0, 0, static_cast<CGFloat>(width), static_cast<CGFloat>(height)),
-                       nativeImage);
-#else
-#error "Need to implement for your platform."
-#endif
-}
-
-} // namespace WebCore