Make the Pepper proxy support in-process font rendering.

ppapi/thunk/ppb_font_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/thunk/thunk.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_font_api.h"
+#include "ppapi/thunk/resource_creation_api.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance,
+                   const PP_FontDescription_Dev* description) {
+  EnterFunction<ResourceCreationAPI> enter(instance, true);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->CreateFontObject(instance, description);
+}
+
+PP_Bool IsFont(PP_Resource resource) {
+  EnterResource<PPB_Font_API> enter(resource, false);
+  return enter.succeeded() ? PP_TRUE : PP_FALSE;
+}
+
+PP_Bool Describe(PP_Resource font_id,
+                 PP_FontDescription_Dev* description,
+                 PP_FontMetrics_Dev* metrics) {
+  EnterResource<PPB_Font_API> enter(font_id, true);
+  if (enter.failed())
+    return PP_FALSE;
+  return enter.object()->Describe(description, metrics);
+}
+
+PP_Bool DrawTextAt(PP_Resource font_id,
+                   PP_Resource image_data,
+                   const PP_TextRun_Dev* text,
+                   const PP_Point* position,
+                   uint32_t color,
+                   const PP_Rect* clip,
+                   PP_Bool image_data_is_opaque) {
+  EnterResource<PPB_Font_API> enter(font_id, true);
+  if (enter.failed())
+    return PP_FALSE;
+  return enter.object()->DrawTextAt(image_data, text, position, color, clip,
+                                    image_data_is_opaque);
+}
+
+int32_t MeasureText(PP_Resource font_id, const PP_TextRun_Dev* text) {
+  EnterResource<PPB_Font_API> enter(font_id, true);
+  if (enter.failed())
+    return -1;
+  return enter.object()->MeasureText(text);
+}
+
+uint32_t CharacterOffsetForPixel(PP_Resource font_id,
+                                 const PP_TextRun_Dev* text,
+                                 int32_t pixel_position) {
+  EnterResource<PPB_Font_API> enter(font_id, true);
+  if (enter.failed())
+    return -1;
+  return enter.object()->CharacterOffsetForPixel(text, pixel_position);
+}
+
+int32_t PixelOffsetForCharacter(PP_Resource font_id,
+                                const PP_TextRun_Dev* text,
+                                uint32_t char_offset) {
+  EnterResource<PPB_Font_API> enter(font_id, true);
+  if (enter.failed())
+    return -1;
+  return enter.object()->PixelOffsetForCharacter(text, char_offset);
+}
+
+const PPB_Font_Dev g_ppb_font_thunk = {
+  &Create,
+  &IsFont,
+  &Describe,
+  &DrawTextAt,
+  &MeasureText,
+  &CharacterOffsetForPixel,
+  &PixelOffsetForCharacter
+};
+
+}  // namespace
+
+const PPB_Font_Dev* GetPPB_Font_Thunk() {
+  return &g_ppb_font_thunk;
+}
+
+}  // namespace thunk
+}  // namespace ppapi