Canvas2D on WebGL texture

third_party/WebKit/Source/platform/graphics/gpu/TextureImageBufferSurface.h

+/*
+ * Copyright (c) 2013, 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.
+ */
+
+#ifndef TextureImageBufferSurface_h
+#define TextureImageBufferSurface_h
+
+#include <memory>
+#include "platform/graphics/ImageBufferSurface.h"
+#include "platform/graphics/paint/PaintCanvas.h"
+#include "public/platform/WebGraphicsContext3DProvider.h"
+#include "third_party/skia/include/core/SkRefCnt.h"
+#include "third_party/skia/include/core/SkSurface.h"
+
+namespace blink {
+
+class PLATFORM_EXPORT TextureImageBufferSurface : public ImageBufferSurface {
+  WTF_MAKE_NONCOPYABLE(TextureImageBufferSurface);
+  USING_FAST_MALLOC(TextureImageBufferSurface);
+
+ public:
+  TextureImageBufferSurface(gpu::gles2::GLES2Interface*,
+                            GLenum,
+                            GLuint,
+                            const IntSize&,
+                            OpacityMode = kNonOpaque,
+                            const CanvasColorParams& = CanvasColorParams());
+
+  ~TextureImageBufferSurface() override {}
+
+  PaintCanvas* Canvas() override { return canvas_.get(); }
+  bool IsValid() const override;
+  bool IsAccelerated() const override { return true; }
+  sk_sp<SkImage> NewImageSnapshot(AccelerationHint, SnapshotReason) override;
+  GLuint GetBackingTextureHandleForOverwrite() override;
+  bool WritePixels(const SkImageInfo& orig_info,
+                   const void* pixels,
+                   size_t row_bytes,
+                   int x,
+                   int y) override;
+
+ private:
+  unsigned context_id_;
+  sk_sp<SkSurface> surface_;  // Uses m_contextProvider.
+  std::unique_ptr<PaintCanvas> canvas_;
+};
+
+}  // namespace blink
+
+#endif