webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 105 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/cairo/NativeImageCairo.cpp b/Source/WebCore/platform/graphics/cairo/NativeImageCairo.cpp
new file mode 100644
index 000000000..69b7bb0f8
--- /dev/null
+++ b/Source/WebCore/platform/graphics/cairo/NativeImageCairo.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2016 Apple 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 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 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 "NativeImage.h"
+
+#if USE(CAIRO)
+
+#include "CairoUtilities.h"
+#include "PlatformContextCairo.h"
+#include <cairo.h>
+
+namespace WebCore {
+
+IntSize nativeImageSize(const NativeImagePtr& image)
+{
+    return image ? cairoSurfaceSize(image.get()) : IntSize();
+}
+
+bool nativeImageHasAlpha(const NativeImagePtr& image)
+{
+    return !image || cairo_surface_get_content(image.get()) != CAIRO_CONTENT_COLOR;
+}
+
+Color nativeImageSinglePixelSolidColor(const NativeImagePtr& image)
+{
+    if (!image || nativeImageSize(image) != IntSize(1, 1))
+        return Color();
+
+    if (cairo_surface_get_type(image.get()) != CAIRO_SURFACE_TYPE_IMAGE)
+        return Color();
+
+    RGBA32* pixel = reinterpret_cast_ptr<RGBA32*>(cairo_image_surface_get_data(image.get()));
+    return colorFromPremultipliedARGB(*pixel);
+}
+
+float subsamplingScale(GraphicsContext&, const FloatRect&, const FloatRect&)
+{
+    return 1;
+}
+
+void drawNativeImage(const NativeImagePtr& image, GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, const IntSize&, CompositeOperator op, BlendMode mode, const ImageOrientation& orientation)
+{
+    context.save();
+    
+    // Set the compositing operation.
+    if (op == CompositeSourceOver && mode == BlendModeNormal && !nativeImageHasAlpha(image))
+        context.setCompositeOperation(CompositeCopy);
+    else
+        context.setCompositeOperation(op, mode);
+        
+#if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
+    IntSize scaledSize = nativeImageSize(image);
+    FloatRect adjustedSrcRect = adjustSourceRectForDownSampling(srcRect, scaledSize);
+#else
+    FloatRect adjustedSrcRect(srcRect);
+#endif
+        
+    FloatRect adjustedDestRect = destRect;
+        
+    if (orientation != DefaultImageOrientation) {
+        // ImageOrientation expects the origin to be at (0, 0).
+        context.translate(destRect.x(), destRect.y());
+        adjustedDestRect.setLocation(FloatPoint());
+        context.concatCTM(orientation.transformFromDefault(adjustedDestRect.size()));
+        if (orientation.usesWidthAsHeight()) {
+            // The destination rectangle will have it's width and height already reversed for the orientation of
+            // the image, as it was needed for page layout, so we need to reverse it back here.
+            adjustedDestRect.setSize(adjustedDestRect.size().transposedSize());
+        }
+    }
+
+    context.platformContext()->drawSurfaceToContext(image.get(), adjustedDestRect, adjustedSrcRect, context);
+    context.restore();
+}
+
+void clearNativeImageSubimages(const NativeImagePtr&)
+{
+}
+
+} // namespace WebCore
+
+#endif // USE(CAIRO)