Adds bindings for ImageShader to SkShader::CreateBitmapShader

sky/engine/core/core.gni

@@ -408,6 +408,8 @@ sky_core_files = [
   "painting/DrawLooperLayerInfo.cpp",
   "painting/DrawLooperLayerInfo.h",
   "painting/FilterQuality.h",
+  "painting/ImageShader.cpp",
+  "painting/ImageShader.h",
   "painting/LayerDrawLooperBuilder.cpp",
   "painting/LayerDrawLooperBuilder.h",
   "painting/LayoutRoot.cpp",
@@ -649,6 +651,7 @@ core_idl_files = get_path_info([
                                  "painting/DrawLooperLayerInfo.idl",
                                  "painting/Gradient.idl",
                                  "painting/Image.idl",
+                                 "painting/ImageShader.idl",
                                  "painting/LayerDrawLooperBuilder.idl",
                                  "painting/LayoutRoot.idl",
                                  "painting/MaskFilter.idl",
@@ -673,6 +676,7 @@ core_dart_files = get_path_info([
                                   "painting/DrawLooperLayerInfo.dart",
                                   "painting/FilterQuality.dart",
                                   "painting/Gradient.dart",
+                                  "painting/ImageShader.dart",
                                   "painting/MaskFilter.dart",
                                   "painting/Offset.dart",
                                   "painting/OffsetBase.dart",

sky/engine/core/painting/ImageShader.cpp

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sky/engine/core/painting/ImageShader.h"
+
+namespace blink {
+
+PassRefPtr<ImageShader> ImageShader::create() {
+  return adoptRef(new ImageShader());
+}
+
+void ImageShader::initWithImage(CanvasImage* image,
+                                SkShader::TileMode tmx,
+                                SkShader::TileMode tmy,
+                                const Float32List& matrix4,
+                                ExceptionState& es) {
+  ASSERT(image != NULL);
+
+  SkMatrix sk_matrix = toSkMatrix(matrix4, es);
+  if (es.had_exception())
+      return;
+
+  SkBitmap bitmap;
+  image->image()->asLegacyBitmap(&bitmap, SkImage::kRO_LegacyBitmapMode);
+
+  set_shader(adoptRef(SkShader::CreateBitmapShader(bitmap, tmx, tmy, &sk_matrix)));
+}
+
+ImageShader::ImageShader() : Shader(nullptr) {
+}
+
+ImageShader::~ImageShader() {
+}
+
+}  // namespace blink

sky/engine/core/painting/ImageShader.dart

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+part of dart.sky;
+
+class ImageShader extends _ImageShader {
+  ImageShader(Image image, TileMode tmx, TileMode tmy, Float32List matrix4) {
+    if (image == null)
+      throw new ArgumentError("[image] argument cannot be null");
+    if (tmx == null)
+      throw new ArgumentError("[tmx] argument cannot be null");
+    if (tmy == null)
+      throw new ArgumentError("[tmy] argument cannot be null");
+    if (matrix4 == null)
+      throw new ArgumentError("[matrix4] argument cannot be null");
+
+    this._initWithImage(image, tmx, tmy, matrix4);
+  }
+}

sky/engine/core/painting/ImageShader.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKY_ENGINE_CORE_PAINTING_IMAGESHADER_H_
+#define SKY_ENGINE_CORE_PAINTING_IMAGESHADER_H_
+
+#include "sky/engine/bindings/exception_state.h"
+#include "sky/engine/core/painting/CanvasGradient.h"
+#include "sky/engine/core/painting/CanvasImage.h"
+#include "sky/engine/core/painting/Shader.h"
+#include "sky/engine/tonic/dart_wrappable.h"
+#include "sky/engine/core/painting/Matrix.h"
+#include "sky/engine/tonic/float32_list.h"
+#include "third_party/skia/include/core/SkShader.h"
+#include "third_party/skia/include/core/SkMatrix.h"
+
+namespace blink {
+
+class ImageShader : public Shader {
+    DEFINE_WRAPPERTYPEINFO();
+ public:
+  ~ImageShader() override;
+  static PassRefPtr<ImageShader> create();
+
+  void initWithImage(CanvasImage* image,
+                     SkShader::TileMode tmx,
+                     SkShader::TileMode tmy,
+                     const Float32List& matrix4,
+                     ExceptionState& es);
+
+ private:
+  ImageShader();
+};
+
+} // namespace blink
+
+#endif  // SKY_ENGINE_CORE_PAINTING_IMAGESHADER_H_

sky/engine/core/painting/ImageShader.idl

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+[
+    PrivateDart,
+    Constructor()
+] interface ImageShader : Shader {
+  [RaisesException] void initWithImage(Image image, TileMode tmx, TileMode tmy, Float32List matrix4);
+};