Renderer-compositor bindings for mix-blend-mode

webkit/renderer/compositor_bindings/web_blend_mode.h

+// Copyright 2013 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 WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_BLEND_MODE_H_
+#define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_BLEND_MODE_H_
+
+#include "third_party/WebKit/public/platform/WebBlendMode.h"
+
+namespace webkit {
+
+inline SkXfermode::Mode BlendModeToSkia(blink::WebBlendMode blend_mode) {
+  switch (blend_mode) {
+    case blink::WebBlendModeNormal:
+      return SkXfermode::kSrcOver_Mode;
+    case blink::WebBlendModeMultiply:
+      return SkXfermode::kMultiply_Mode;
+    case blink::WebBlendModeScreen:
+      return SkXfermode::kScreen_Mode;
+    case blink::WebBlendModeOverlay:
+      return SkXfermode::kOverlay_Mode;
+    case blink::WebBlendModeDarken:
+      return SkXfermode::kDarken_Mode;
+    case blink::WebBlendModeLighten:
+      return SkXfermode::kLighten_Mode;
+    case blink::WebBlendModeColorDodge:
+      return SkXfermode::kColorDodge_Mode;
+    case blink::WebBlendModeColorBurn:
+      return SkXfermode::kColorBurn_Mode;
+    case blink::WebBlendModeHardLight:
+      return SkXfermode::kHardLight_Mode;
+    case blink::WebBlendModeSoftLight:
+      return SkXfermode::kSoftLight_Mode;
+    case blink::WebBlendModeDifference:
+      return SkXfermode::kDifference_Mode;
+    case blink::WebBlendModeExclusion:
+      return SkXfermode::kExclusion_Mode;
+    case blink::WebBlendModeHue:
+      return SkXfermode::kHue_Mode;
+    case blink::WebBlendModeSaturation:
+      return SkXfermode::kSaturation_Mode;
+    case blink::WebBlendModeColor:
+      return SkXfermode::kColor_Mode;
+    case blink::WebBlendModeLuminosity:
+      return SkXfermode::kLuminosity_Mode;
+  }
+  return SkXfermode::kSrcOver_Mode;
+}
+
+inline blink::WebBlendMode BlendModeFromSkia(SkXfermode::Mode blend_mode) {
+  switch (blend_mode) {
+    case SkXfermode::kSrcOver_Mode:
+      return blink::WebBlendModeNormal;
+    case SkXfermode::kMultiply_Mode:
+      return blink::WebBlendModeMultiply;
+    case SkXfermode::kScreen_Mode:
+      return blink::WebBlendModeScreen;
+    case SkXfermode::kOverlay_Mode:
+      return blink::WebBlendModeOverlay;
+    case SkXfermode::kDarken_Mode:
+      return blink::WebBlendModeDarken;
+    case SkXfermode::kLighten_Mode:
+      return blink::WebBlendModeLighten;
+    case SkXfermode::kColorDodge_Mode:
+      return blink::WebBlendModeColorDodge;
+    case SkXfermode::kColorBurn_Mode:
+      return blink::WebBlendModeColorBurn;
+    case SkXfermode::kHardLight_Mode:
+      return blink::WebBlendModeHardLight;
+    case SkXfermode::kSoftLight_Mode:
+      return blink::WebBlendModeSoftLight;
+    case SkXfermode::kDifference_Mode:
+      return blink::WebBlendModeDifference;
+    case SkXfermode::kExclusion_Mode:
+      return blink::WebBlendModeExclusion;
+    case SkXfermode::kHue_Mode:
+      return blink::WebBlendModeHue;
+    case SkXfermode::kSaturation_Mode:
+      return blink::WebBlendModeSaturation;
+    case SkXfermode::kColor_Mode:
+      return blink::WebBlendModeColor;
+    case SkXfermode::kLuminosity_Mode:
+      return blink::WebBlendModeLuminosity;
+
+    // these value are SkXfermodes, but no blend modes.
+    case SkXfermode::kClear_Mode:
+    case SkXfermode::kSrc_Mode:
+    case SkXfermode::kDst_Mode:
+    case SkXfermode::kDstOver_Mode:
+    case SkXfermode::kSrcIn_Mode:
+    case SkXfermode::kDstIn_Mode:
+    case SkXfermode::kSrcOut_Mode:
+    case SkXfermode::kDstOut_Mode:
+    case SkXfermode::kSrcATop_Mode:
+    case SkXfermode::kDstATop_Mode:
+    case SkXfermode::kXor_Mode:
+    case SkXfermode::kPlus_Mode:
+    case SkXfermode::kModulate_Mode:
+      NOTREACHED();
+  }
+  return blink::WebBlendModeNormal;
+}
+
+}  // namespace webkit
+
+#endif  // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_BLEND_MODE_H_