New thunk system for Pepper proxy and implementation

ppapi/thunk/ppb_graphics_2d_thunk.cc

+// Copyright (c) 2011 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 "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_graphics_2d.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_graphics_2d_api.h"
+#include "ppapi/thunk/resource_creation_api.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance,
+                   const PP_Size* size,
+                   PP_Bool is_always_opaque) {
+  EnterFunction<ResourceCreationAPI> enter(instance, true);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->CreateGraphics2D(instance, *size, is_always_opaque);
+}
+
+PP_Bool IsGraphics2D(PP_Resource resource) {
+  EnterResource<PPB_Graphics2D_API> enter(resource, false);
+  return enter.succeeded() ? PP_TRUE : PP_FALSE;
+}
+
+PP_Bool Describe(PP_Resource graphics_2d,
+                 PP_Size* size,
+                 PP_Bool* is_always_opaque) {
+  EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
+  if (enter.failed()) {
+    size->width = 0;
+    size->height = 0;
+    *is_always_opaque = PP_FALSE;
+    return PP_FALSE;
+  }
+  return enter.object()->Describe(size, is_always_opaque);
+}
+
+void PaintImageData(PP_Resource graphics_2d,
+                    PP_Resource image_data,
+                    const PP_Point* top_left,
+                    const PP_Rect* src_rect) {
+  EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
+  if (enter.failed())
+    return;
+  enter.object()->PaintImageData(image_data, top_left, src_rect);
+}
+
+void Scroll(PP_Resource graphics_2d,
+            const PP_Rect* clip_rect,
+            const PP_Point* amount) {
+  EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
+  if (enter.failed())
+    return;
+  enter.object()->Scroll(clip_rect, amount);
+}
+
+void ReplaceContents(PP_Resource graphics_2d, PP_Resource image_data) {
+  EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
+  if (enter.failed())
+    return;
+  enter.object()->ReplaceContents(image_data);
+}
+
+int32_t Flush(PP_Resource graphics_2d,
+              PP_CompletionCallback callback) {
+  EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
+  if (enter.failed())
+    return PP_ERROR_BADARGUMENT;
+  return enter.object()->Flush(callback);
+}
+
+const PPB_Graphics2D g_ppb_graphics_2d_thunk = {
+  &Create,
+  &IsGraphics2D,
+  &Describe,
+  &PaintImageData,
+  &Scroll,
+  &ReplaceContents,
+  &Flush
+};
+
+}  // namespace
+
+const PPB_Graphics2D* GetPPB_Graphics2D_Thunk() {
+  return &g_ppb_graphics_2d_thunk;
+}
+
+}  // namespace thunk
+}  // namespace ppapi