src/ppapi/proxy/graphics_2d_resource.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/proxy/graphics_2d_resource.h"
   6
   7 #include "ppapi/c/pp_bool.h"
   8 #include "ppapi/c/pp_point.h"
   9 #include "ppapi/c/pp_rect.h"
  10 #include "ppapi/c/pp_resource.h"
  11 #include "ppapi/c/pp_size.h"
  12 #include "ppapi/c/ppb_graphics_2d.h"
  13 #include "ppapi/proxy/dispatch_reply_message.h"
  14 #include "ppapi/proxy/ppapi_messages.h"
  15 #include "ppapi/shared_impl/ppapi_globals.h"
  16 #include "ppapi/shared_impl/resource_tracker.h"
  17 #include "ppapi/shared_impl/tracked_callback.h"
  18 #include "ppapi/thunk/enter.h"
  19 #include "ppapi/thunk/ppb_image_data_api.h"
  20
  21 namespace ppapi {
  22 namespace proxy {
  23
  24 Graphics2DResource::Graphics2DResource(Connection connection,
  25                                        PP_Instance instance,
  26                                        const PP_Size& size,
  27                                        PP_Bool is_always_opaque)
  28     : PluginResource(connection, instance),
  29       size_(size),
  30       is_always_opaque_(is_always_opaque),
  31       scale_(1.0f) {
  32   // These checks are copied from PPB_ImageData_Impl::Init to make tests passed.
  33   // Let's remove/refactor this when start to refactor ImageData.
  34   bool bad_args = size.width <= 0 || size.height <= 0 ||
  35       static_cast<int64>(size.width) * static_cast<int64>(size.height) >=
  36           std::numeric_limits<int32>::max() / 4;
  37   if (!bad_args && !sent_create_to_renderer()) {
  38     SendCreate(RENDERER,
  39         PpapiHostMsg_Graphics2D_Create(size, is_always_opaque));
  40   }
  41 }
  42
  43 Graphics2DResource::~Graphics2DResource() {
  44 }
  45
  46 PP_Bool Graphics2DResource::Describe(PP_Size* size, PP_Bool* is_always_opaque) {
  47   *size = size_;
  48   *is_always_opaque = is_always_opaque_;
  49   return PP_TRUE;
  50 }
  51
  52 thunk::PPB_Graphics2D_API* Graphics2DResource::AsPPB_Graphics2D_API() {
  53   return this;
  54 }
  55
  56 void Graphics2DResource::PaintImageData(PP_Resource image_data,
  57                                         const PP_Point* top_left,
  58                                         const PP_Rect* src_rect) {
  59   Resource* image_object =
  60       PpapiGlobals::Get()->GetResourceTracker()->GetResource(image_data);
  61   if (!image_object || pp_instance() != image_object->pp_instance()) {
  62     Log(PP_LOGLEVEL_ERROR,
  63         "Graphics2DResource.PaintImageData: Bad image resource.");
  64     return;
  65   }
  66
  67   PP_Rect dummy;
  68   memset(&dummy, 0, sizeof(PP_Rect));
  69   Post(RENDERER, PpapiHostMsg_Graphics2D_PaintImageData(
  70       image_object->host_resource(), *top_left,
  71       !!src_rect, src_rect ? *src_rect : dummy));
  72 }
  73
  74 void Graphics2DResource::Scroll(const PP_Rect* clip_rect,
  75                                 const PP_Point* amount) {
  76   PP_Rect dummy;
  77   memset(&dummy, 0, sizeof(PP_Rect));
  78   Post(RENDERER, PpapiHostMsg_Graphics2D_Scroll(
  79       !!clip_rect, clip_rect ? *clip_rect : dummy, *amount));
  80 }
  81
  82 void Graphics2DResource::ReplaceContents(PP_Resource image_data) {
  83   thunk::EnterResourceNoLock<thunk::PPB_ImageData_API> enter_image(
  84       image_data, true);
  85   if (enter_image.failed())
  86     return;
  87
  88   // Check that the PP_Instance matches.
  89   Resource* image_object =
  90       PpapiGlobals::Get()->GetResourceTracker()->GetResource(image_data);
  91   if (!image_object || pp_instance() != image_object->pp_instance()) {
  92     Log(PP_LOGLEVEL_ERROR,
  93         "Graphics2DResource.PaintImageData: Bad image resource.");
  94     return;
  95   }
  96   enter_image.object()->SetIsCandidateForReuse();
  97
  98   Post(RENDERER, PpapiHostMsg_Graphics2D_ReplaceContents(
  99       image_object->host_resource()));
 100 }
 101
 102 PP_Bool Graphics2DResource::SetScale(float scale) {
 103   if (scale <= 0.0f)
 104     return PP_FALSE;
 105   Post(RENDERER, PpapiHostMsg_Graphics2D_Dev_SetScale(scale));
 106   scale_ = scale;
 107   return PP_TRUE;
 108 }
 109
 110 float Graphics2DResource::GetScale() {
 111   return scale_;
 112 }
 113
 114 int32_t Graphics2DResource::Flush(scoped_refptr<TrackedCallback> callback) {
 115   // If host is not even created, return failure immediately.  This can happen
 116   // when failed to initialize (in constructor).
 117   if (!sent_create_to_renderer())
 118     return PP_ERROR_FAILED;
 119
 120   if (TrackedCallback::IsPending(current_flush_callback_))
 121     return PP_ERROR_INPROGRESS;  // Can't have >1 flush pending.
 122   current_flush_callback_ = callback;
 123
 124   Call<PpapiPluginMsg_Graphics2D_FlushAck>(
 125       RENDERER,
 126       PpapiHostMsg_Graphics2D_Flush(),
 127       base::Bind(&Graphics2DResource::OnPluginMsgFlushACK, this));
 128   return PP_OK_COMPLETIONPENDING;
 129 }
 130
 131 bool Graphics2DResource::ReadImageData(PP_Resource image,
 132                                        const PP_Point* top_left) {
 133   if (!top_left)
 134     return false;
 135   int32_t result = SyncCall<PpapiPluginMsg_Graphics2D_ReadImageDataAck>(
 136       RENDERER,
 137       PpapiHostMsg_Graphics2D_ReadImageData(image, *top_left));
 138   return result == PP_OK;
 139 }
 140
 141 void Graphics2DResource::OnPluginMsgFlushACK(
 142     const ResourceMessageReplyParams& params) {
 143   current_flush_callback_->Run(params.result());
 144 }
 145
 146 }  // namespace proxy
 147 }  // namespace ppapi