1 files changed, 120 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/cairo/GraphicsContext3DCairo.cpp b/Source/WebCore/platform/graphics/cairo/GraphicsContext3DCairo.cpp
new file mode 100644
index 0000000..c90d8ab
--- /dev/null
+++ b/Source/WebCore/platform/graphics/cairo/GraphicsContext3DCairo.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ * Copyright (C) 2011 Igalia S.L.
+ *
+ * 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"
+#include "GraphicsContext3D.h"
+#include "PlatformContextCairo.h"
+
+#if ENABLE(WEBGL)
+
+#include "Image.h"
+#include "RefPtrCairo.h"
+#include <cairo.h>
+#include <wtf/PassOwnPtr.h>
+
+namespace WebCore {
+
+bool GraphicsContext3D::getImageData(Image* image, unsigned int format, unsigned int type, bool premultiplyAlpha, bool ignoreGammaAndColorProfile, Vector<uint8_t>& outputVector)
+{
+    if (!image)
+        return false;
+    // We need this to stay in scope because the native image is just a shallow copy of the data.
+    ImageSource decoder(premultiplyAlpha ? ImageSource::AlphaPremultiplied : ImageSource::AlphaNotPremultiplied,
+                        ignoreGammaAndColorProfile ? ImageSource::GammaAndColorProfileIgnored : ImageSource::GammaAndColorProfileApplied);
+    AlphaOp alphaOp = AlphaDoNothing;
+    RefPtr<cairo_surface_t> imageSurface;
+    if (image->data()) {
+        decoder.setData(image->data(), true);
+        if (!decoder.frameCount() || !decoder.frameIsCompleteAtIndex(0))
+            return false;
+        imageSurface = decoder.createFrameAtIndex(0);
+    } else {
+        imageSurface = image->nativeImageForCurrentFrame();
+        if (!premultiplyAlpha)
+            alphaOp = AlphaDoUnmultiply;
+    }
+
+    if (!imageSurface)
+        return false;
+
+    int width = cairo_image_surface_get_width(imageSurface.get());
+    int height = cairo_image_surface_get_height(imageSurface.get());
+    if (!width || !height)
+        return false;
+
+    if (cairo_image_surface_get_format(imageSurface.get()) != CAIRO_FORMAT_ARGB32)
+        return false;
+
+    unsigned int srcUnpackAlignment = 1;
+    size_t bytesPerRow = cairo_image_surface_get_stride(imageSurface.get());
+    size_t bitsPerPixel = 32;
+    unsigned int padding = bytesPerRow - bitsPerPixel / 8 * width;
+    if (padding) {
+        srcUnpackAlignment = padding + 1;
+        while (bytesPerRow % srcUnpackAlignment)
+            ++srcUnpackAlignment;
+    }
+
+    outputVector.resize(width * height * 4);
+    return packPixels(cairo_image_surface_get_data(imageSurface.get()), SourceFormatBGRA8,
+                      width, height, srcUnpackAlignment, format, type, alphaOp, outputVector.data());
+}
+
+void GraphicsContext3D::paintToCanvas(const unsigned char* imagePixels, int imageWidth, int imageHeight, int canvasWidth, int canvasHeight, PlatformContextCairo* context)
+{
+    if (!imagePixels || imageWidth <= 0 || imageHeight <= 0 || canvasWidth <= 0 || canvasHeight <= 0 || !context)
+        return;
+
+    cairo_t *cr = context->cr();
+    context->save();
+
+    cairo_rectangle(cr, 0, 0, canvasWidth, canvasHeight);
+    cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
+    cairo_paint(cr);
+
+    RefPtr<cairo_surface_t> imageSurface = adoptRef(cairo_image_surface_create_for_data(
+        const_cast<unsigned char*>(imagePixels), CAIRO_FORMAT_ARGB32, imageWidth, imageHeight, imageWidth * 4));
+
+    // OpenGL keeps the pixels stored bottom up, so we need to flip the image here.
+    cairo_translate(cr, 0, imageHeight);
+    cairo_scale(cr, 1, -1);
+
+    cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_surface(cr, imageSurface.get(), 0, 0);
+    cairo_rectangle(cr, 0, 0, canvasWidth, -canvasHeight);
+
+    cairo_fill(cr);
+    context->restore();
+}
+
+void GraphicsContext3D::setContextLostCallback(PassOwnPtr<ContextLostCallback>)
+{
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEBGL)