ppapi/thunk/ppb_graphics_2d_thunk.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/c/pp_completion_callback.h"
   6 #include "ppapi/c/pp_errors.h"
   7 #include "ppapi/c/ppb_graphics_2d.h"
   8 #include "ppapi/thunk/enter.h"
   9 #include "ppapi/thunk/ppb_graphics_2d_api.h"
  10 #include "ppapi/thunk/resource_creation_api.h"
  11 #include "ppapi/thunk/thunk.h"
  12
  13 namespace ppapi {
  14 namespace thunk {
  15
  16 namespace {
  17
  18 typedef EnterResource<PPB_Graphics2D_API> EnterGraphics2D;
  19
  20 PP_Resource Create(PP_Instance instance,
  21                    const PP_Size* size,
  22                    PP_Bool is_always_opaque) {
  23   EnterResourceCreation enter(instance);
  24   if (enter.failed())
  25     return 0;
  26   return enter.functions()->CreateGraphics2D(instance, *size, is_always_opaque);
  27 }
  28
  29 PP_Bool IsGraphics2D(PP_Resource resource) {
  30   EnterGraphics2D enter(resource, false);
  31   return enter.succeeded() ? PP_TRUE : PP_FALSE;
  32 }
  33
  34 PP_Bool Describe(PP_Resource graphics_2d,
  35                  PP_Size* size,
  36                  PP_Bool* is_always_opaque) {
  37   EnterGraphics2D enter(graphics_2d, true);
  38   if (enter.failed()) {
  39     size->width = 0;
  40     size->height = 0;
  41     *is_always_opaque = PP_FALSE;
  42     return PP_FALSE;
  43   }
  44   return enter.object()->Describe(size, is_always_opaque);
  45 }
  46
  47 void PaintImageData(PP_Resource graphics_2d,
  48                     PP_Resource image_data,
  49                     const PP_Point* top_left,
  50                     const PP_Rect* src_rect) {
  51   EnterGraphics2D enter(graphics_2d, true);
  52   if (enter.failed())
  53     return;
  54   enter.object()->PaintImageData(image_data, top_left, src_rect);
  55 }
  56
  57 void Scroll(PP_Resource graphics_2d,
  58             const PP_Rect* clip_rect,
  59             const PP_Point* amount) {
  60   EnterGraphics2D enter(graphics_2d, true);
  61   if (enter.failed())
  62     return;
  63   enter.object()->Scroll(clip_rect, amount);
  64 }
  65
  66 void ReplaceContents(PP_Resource graphics_2d, PP_Resource image_data) {
  67   EnterGraphics2D enter(graphics_2d, true);
  68   if (enter.failed())
  69     return;
  70   enter.object()->ReplaceContents(image_data);
  71 }
  72
  73 int32_t Flush(PP_Resource graphics_2d,
  74               PP_CompletionCallback callback) {
  75   EnterGraphics2D enter(graphics_2d, callback, true);
  76   if (enter.failed())
  77     return enter.retval();
  78   return enter.SetResult(enter.object()->Flush(callback));
  79 }
  80
  81 const PPB_Graphics2D g_ppb_graphics_2d_thunk = {
  82   &Create,
  83   &IsGraphics2D,
  84   &Describe,
  85   &PaintImageData,
  86   &Scroll,
  87   &ReplaceContents,
  88   &Flush
  89 };
  90
  91 }  // namespace
  92
  93 const PPB_Graphics2D_1_0* GetPPB_Graphics2D_1_0_Thunk() {
  94   return &g_ppb_graphics_2d_thunk;
  95 }
  96
  97 }  // namespace thunk
  98 }  // namespace ppapi