1 files changed, 101 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/cg/GraphicsContext3DCG.cpp b/WebCore/platform/graphics/cg/GraphicsContext3DCG.cpp
new file mode 100644
index 0000000..c6a8f83
--- /dev/null
+++ b/WebCore/platform/graphics/cg/GraphicsContext3DCG.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 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 COMPUTER, INC. ``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 COMPUTER, INC. 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. 
+ */
+
+#include "config.h"
+
+#if ENABLE(3D_CANVAS)
+
+#include "GraphicsContext3D.h"
+
+#include "Image.h"
+
+#include <CoreGraphics/CGBitmapContext.h>
+#include <CoreGraphics/CGContext.h>
+#include <CoreGraphics/CGImage.h>
+
+namespace WebCore {
+
+bool GraphicsContext3D::getImageData(Image* image,
+                                     Vector<uint8_t>& outputVector,
+                                     bool premultiplyAlpha,
+                                     bool* hasAlphaChannel,
+                                     AlphaOp* neededAlphaOp,
+                                     unsigned int* format)
+{
+    if (!image)
+        return false;
+    CGImageRef cgImage = image->nativeImageForCurrentFrame();
+    if (!cgImage)
+        return false;
+    int width = CGImageGetWidth(cgImage);
+    int height = CGImageGetHeight(cgImage);
+    int rowBytes = width * 4;
+    CGImageAlphaInfo info = CGImageGetAlphaInfo(cgImage);
+    *hasAlphaChannel = (info != kCGImageAlphaNone
+                        && info != kCGImageAlphaNoneSkipLast
+                        && info != kCGImageAlphaNoneSkipFirst);
+    if (!premultiplyAlpha && *hasAlphaChannel)
+        // FIXME: must fetch the image data before the premultiplication step
+        *neededAlphaOp = kAlphaDoUnmultiply;
+    *format = RGBA;
+    outputVector.resize(height * rowBytes);
+    // 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.
+    CGColorSpaceRef colorSpace = CGImageGetColorSpace(cgImage);
+    bool releaseColorSpace = false;
+    CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
+    switch (colorSpaceModel) {
+    case kCGColorSpaceModelMonochrome:
+    case kCGColorSpaceModelRGB:
+    case kCGColorSpaceModelCMYK:
+    case kCGColorSpaceModelLab:
+    case kCGColorSpaceModelDeviceN:
+        break;
+    default:
+        colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGBLinear);
+        releaseColorSpace = true;
+        break;
+    }
+    CGContextRef tmpContext = CGBitmapContextCreate(outputVector.data(),
+                                                    width, height, 8, rowBytes,
+                                                    colorSpace,
+                                                    kCGImageAlphaPremultipliedLast);
+    if (releaseColorSpace)
+        CGColorSpaceRelease(colorSpace);
+    if (!tmpContext)
+        return false;
+    CGContextSetBlendMode(tmpContext, kCGBlendModeCopy);
+    CGContextDrawImage(tmpContext,
+                       CGRectMake(0, 0, static_cast<CGFloat>(width), static_cast<CGFloat>(height)),
+                       cgImage);
+    CGContextRelease(tmpContext);
+    return true;
+}
+
+
+} // namespace WebCore
+
+#endif // ENABLE(3D_CANVAS)