Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/custom/DartHTMLCanvasElementCustom.cpp

+// Copyright 2011, 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:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * 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.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 THE COPYRIGHT
+// OWNER 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 "bindings/core/dart/DartHTMLCanvasElement.h"
+
+#include "bindings/core/dart/DartCanvasRenderingContext2D.h"
+#include "bindings/core/dart/DartDOMWrapper.h"
+#include "bindings/core/dart/DartUtilities.h"
+#include "bindings/core/dart/DartWebGLRenderingContext.h"
+#include "core/html/canvas/CanvasContextAttributes.h"
+#include "core/html/canvas/CanvasRenderingContext2D.h"
+#include "core/html/canvas/CanvasRenderingContext.h"
+#include "core/html/canvas/WebGLContextAttributes.h"
+#include "core/html/canvas/WebGLRenderingContext.h"
+#include "core/html/HTMLCanvasElement.h"
+
+namespace blink {
+
+namespace DartHTMLCanvasElementInternal {
+
+void toDataURLCallback(Dart_NativeArguments args)
+{
+    Dart_Handle exception = 0;
+    {
+        HTMLCanvasElement* receiver = DartDOMWrapper::receiver<HTMLCanvasElement>(args);
+
+        DartStringAdapter type = DartUtilities::dartToString(args, 1, exception);
+        if (exception)
+            goto fail;
+
+        double quality;
+        double* qualityPtr = 0;
+        Dart_Handle secondArgument = Dart_GetNativeArgument(args, 2);
+        if (!Dart_IsNull(secondArgument)) {
+            quality = DartUtilities::dartToDouble(secondArgument, exception);
+            if (exception)
+                goto fail;
+            qualityPtr = &quality;
+        }
+
+        DartExceptionState es;
+        String result = receiver->toDataURL(type, qualityPtr, es);
+        if (es.hadException()) {
+            exception = es.toDart(args);
+            goto fail;
+        }
+
+        Dart_SetReturnValue(args, DartUtilities::stringToDartWithNullCheck(result));
+        return;
+    }
+
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
+}
+
+void getContextCallback(Dart_NativeArguments args)
+{
+    Dart_Handle exception = 0;
+    {
+        HTMLCanvasElement* receiver = DartDOMWrapper::receiver<HTMLCanvasElement>(args);
+
+        DartStringAdapter contextId = DartUtilities::dartToString(args, 1, exception);
+        if (exception)
+            goto fail;
+
+        RefPtr<CanvasContextAttributes> attrs;
+        const String& contextIdStr = contextId;
+        if (contextIdStr == "webgl" || contextIdStr == "experimental-webgl" || contextIdStr == "webkit-3d") {
+            attrs = WebGLContextAttributes::create();
+            WebGLContextAttributes* webGLAttrs = static_cast<WebGLContextAttributes*>(attrs.get());
+            Dart_Handle attrsAsMapHandle = Dart_GetNativeArgument(args, 2);
+            if (!Dart_IsNull(attrsAsMapHandle)) {
+                Dart_Handle attrsAsIntHandle = DartUtilities::invokeUtilsMethod("convertCanvasElementGetContextMap", 1, &attrsAsMapHandle);
+                if (!DartUtilities::checkResult(attrsAsIntHandle, exception))
+                    goto fail;
+                int attrsAsInt = DartUtilities::toInteger(attrsAsIntHandle, exception);
+                if (exception)
+                    goto fail;
+
+                webGLAttrs->setAlpha(attrsAsInt & 0x01);
+                webGLAttrs->setDepth(attrsAsInt & 0x02);
+                webGLAttrs->setStencil(attrsAsInt & 0x04);
+                webGLAttrs->setAntialias(attrsAsInt & 0x08);
+                webGLAttrs->setPremultipliedAlpha(attrsAsInt & 0x10);
+                webGLAttrs->setPreserveDrawingBuffer(attrsAsInt & 0x20);
+            }
+        }
+
+        CanvasRenderingContext* result = receiver->getContext(contextId, attrs.get());
+        if (!result)
+            return;
+        if (result->is2d())
+            DartDOMWrapper::returnToDart<DartCanvasRenderingContext2D>(args, static_cast<CanvasRenderingContext2D*>(result));
+        else if (result->is3d())
+            DartDOMWrapper::returnToDart<DartWebGLRenderingContext>(args, static_cast<WebGLRenderingContext*>(result));
+        else
+            ASSERT_NOT_REACHED();
+        return;
+    }
+
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
+}
+
+void getContextCallback_1(Dart_NativeArguments args)
+{
+    return getContextCallback(args);
+}
+
+void getContextCallback_2(Dart_NativeArguments args)
+{
+    return getContextCallback(args);
+}
+
+} // namespace DartHTMLCanvasElementInternal
+
+} // namespace blink