src/chrome/renderer/pepper/pepper_flash_renderer_host.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 "chrome/renderer/pepper/pepper_flash_renderer_host.h"
   6
   7 #include <vector>
   8
   9 #include "chrome/renderer/pepper/ppb_pdf_impl.h"
  10 #include "content/public/renderer/pepper_plugin_instance.h"
  11 #include "content/public/renderer/render_thread.h"
  12 #include "content/public/renderer/renderer_ppapi_host.h"
  13 #include "ipc/ipc_message_macros.h"
  14 #include "ppapi/c/pp_errors.h"
  15 #include "ppapi/c/trusted/ppb_browser_font_trusted.h"
  16 #include "ppapi/host/dispatch_host_message.h"
  17 #include "ppapi/proxy/host_dispatcher.h"
  18 #include "ppapi/proxy/ppapi_messages.h"
  19 #include "ppapi/proxy/resource_message_params.h"
  20 #include "ppapi/proxy/serialized_structs.h"
  21 #include "ppapi/thunk/enter.h"
  22 #include "ppapi/thunk/ppb_image_data_api.h"
  23 #include "skia/ext/platform_canvas.h"
  24 #include "third_party/skia/include/core/SkCanvas.h"
  25 #include "third_party/skia/include/core/SkMatrix.h"
  26 #include "third_party/skia/include/core/SkPaint.h"
  27 #include "third_party/skia/include/core/SkPoint.h"
  28 #include "third_party/skia/include/core/SkTemplates.h"
  29 #include "third_party/skia/include/core/SkTypeface.h"
  30 #include "ui/gfx/rect.h"
  31 #include "url/gurl.h"
  32
  33 using ppapi::thunk::EnterResourceNoLock;
  34 using ppapi::thunk::PPB_ImageData_API;
  35
  36 PepperFlashRendererHost::PepperFlashRendererHost(
  37     content::RendererPpapiHost* host,
  38     PP_Instance instance,
  39     PP_Resource resource)
  40     : ResourceHost(host->GetPpapiHost(), instance, resource),
  41       host_(host),
  42       weak_factory_(this) {
  43 }
  44
  45 PepperFlashRendererHost::~PepperFlashRendererHost() {
  46   // This object may be destroyed in the middle of a sync message. If that is
  47   // the case, make sure we respond to all the pending navigate calls.
  48   std::vector<ppapi::host::ReplyMessageContext>::reverse_iterator it;
  49   for (it = navigate_replies_.rbegin(); it != navigate_replies_.rend(); ++it)
  50     SendReply(*it, IPC::Message());
  51 }
  52
  53 int32_t PepperFlashRendererHost::OnResourceMessageReceived(
  54     const IPC::Message& msg,
  55     ppapi::host::HostMessageContext* context) {
  56   IPC_BEGIN_MESSAGE_MAP(PepperFlashRendererHost, msg)
  57     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_GetProxyForURL,
  58                                       OnGetProxyForURL);
  59     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_SetInstanceAlwaysOnTop,
  60                                       OnSetInstanceAlwaysOnTop);
  61     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_DrawGlyphs,
  62                                       OnDrawGlyphs);
  63     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_Navigate,
  64                                       OnNavigate);
  65     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_IsRectTopmost,
  66                                       OnIsRectTopmost);
  67     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_Flash_InvokePrinting,
  68                                         OnInvokePrinting);
  69   IPC_END_MESSAGE_MAP()
  70   return PP_ERROR_FAILED;
  71 }
  72
  73 int32_t PepperFlashRendererHost::OnGetProxyForURL(
  74     ppapi::host::HostMessageContext* host_context,
  75     const std::string& url) {
  76   GURL gurl(url);
  77   if (!gurl.is_valid())
  78     return PP_ERROR_FAILED;
  79   std::string proxy;
  80   bool result = content::RenderThread::Get()->ResolveProxy(gurl, &proxy);
  81   if (!result)
  82     return PP_ERROR_FAILED;
  83   host_context->reply_msg = PpapiPluginMsg_Flash_GetProxyForURLReply(proxy);
  84   return PP_OK;
  85 }
  86
  87 int32_t PepperFlashRendererHost::OnSetInstanceAlwaysOnTop(
  88     ppapi::host::HostMessageContext* host_context,
  89     bool on_top) {
  90   content::PepperPluginInstance* plugin_instance =
  91       host_->GetPluginInstance(pp_instance());
  92   if (plugin_instance)
  93     plugin_instance->SetAlwaysOnTop(on_top);
  94   // Since no reply is sent for this message, it doesn't make sense to return an
  95   // error.
  96   return PP_OK;
  97 }
  98
  99 int32_t PepperFlashRendererHost::OnDrawGlyphs(
 100     ppapi::host::HostMessageContext* host_context,
 101     ppapi::proxy::PPBFlash_DrawGlyphs_Params params) {
 102   if (params.glyph_indices.size() != params.glyph_advances.size() ||
 103       params.glyph_indices.empty())
 104     return PP_ERROR_FAILED;
 105
 106   // Set up the typeface.
 107   int style = SkTypeface::kNormal;
 108   if (static_cast<PP_BrowserFont_Trusted_Weight>(params.font_desc.weight) >=
 109       PP_BROWSERFONT_TRUSTED_WEIGHT_BOLD)
 110     style |= SkTypeface::kBold;
 111   if (params.font_desc.italic)
 112     style |= SkTypeface::kItalic;
 113   skia::RefPtr<SkTypeface> typeface = skia::AdoptRef(
 114       SkTypeface::CreateFromName(params.font_desc.face.c_str(),
 115                                  static_cast<SkTypeface::Style>(style)));
 116   if (!typeface)
 117     return PP_ERROR_FAILED;
 118
 119   EnterResourceNoLock<PPB_ImageData_API> enter(
 120       params.image_data.host_resource(), true);
 121   if (enter.failed())
 122     return PP_ERROR_FAILED;
 123
 124   // Set up the canvas.
 125   PPB_ImageData_API* image = static_cast<PPB_ImageData_API*>(
 126       enter.object());
 127   SkCanvas* canvas = image->GetPlatformCanvas();
 128   bool needs_unmapping = false;
 129   if (!canvas) {
 130     needs_unmapping = true;
 131     image->Map();
 132     canvas = image->GetPlatformCanvas();
 133     if (!canvas)
 134       return PP_ERROR_FAILED;  // Failure mapping.
 135   }
 136
 137   SkAutoCanvasRestore acr(canvas, true);
 138
 139   // Clip is applied in pixels before the transform.
 140   SkRect clip_rect = {
 141     SkIntToScalar(params.clip.point.x),
 142     SkIntToScalar(params.clip.point.y),
 143     SkIntToScalar(params.clip.point.x + params.clip.size.width),
 144     SkIntToScalar(params.clip.point.y + params.clip.size.height)
 145   };
 146   canvas->clipRect(clip_rect);
 147
 148   // Convert & set the matrix.
 149   SkMatrix matrix;
 150   matrix.set(SkMatrix::kMScaleX, SkFloatToScalar(params.transformation[0][0]));
 151   matrix.set(SkMatrix::kMSkewX,  SkFloatToScalar(params.transformation[0][1]));
 152   matrix.set(SkMatrix::kMTransX, SkFloatToScalar(params.transformation[0][2]));
 153   matrix.set(SkMatrix::kMSkewY,  SkFloatToScalar(params.transformation[1][0]));
 154   matrix.set(SkMatrix::kMScaleY, SkFloatToScalar(params.transformation[1][1]));
 155   matrix.set(SkMatrix::kMTransY, SkFloatToScalar(params.transformation[1][2]));
 156   matrix.set(SkMatrix::kMPersp0, SkFloatToScalar(params.transformation[2][0]));
 157   matrix.set(SkMatrix::kMPersp1, SkFloatToScalar(params.transformation[2][1]));
 158   matrix.set(SkMatrix::kMPersp2, SkFloatToScalar(params.transformation[2][2]));
 159   canvas->concat(matrix);
 160
 161   SkPaint paint;
 162   paint.setColor(params.color);
 163   paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
 164   paint.setAntiAlias(true);
 165   paint.setHinting(SkPaint::kFull_Hinting);
 166   paint.setTextSize(SkIntToScalar(params.font_desc.size));
 167   paint.setTypeface(typeface.get());  // Takes a ref and manages lifetime.
 168   if (params.allow_subpixel_aa) {
 169     paint.setSubpixelText(true);
 170     paint.setLCDRenderText(true);
 171   }
 172
 173   SkScalar x = SkIntToScalar(params.position.x);
 174   SkScalar y = SkIntToScalar(params.position.y);
 175
 176   // Build up the skia advances.
 177   size_t glyph_count = params.glyph_indices.size();
 178   if (glyph_count) {
 179     std::vector<SkPoint> storage;
 180     storage.resize(glyph_count);
 181     SkPoint* sk_positions = &storage[0];
 182     for (uint32_t i = 0; i < glyph_count; i++) {
 183       sk_positions[i].set(x, y);
 184       x += SkFloatToScalar(params.glyph_advances[i].x);
 185       y += SkFloatToScalar(params.glyph_advances[i].y);
 186     }
 187
 188     canvas->drawPosText(&params.glyph_indices[0], glyph_count * 2, sk_positions,
 189                         paint);
 190   }
 191
 192   if (needs_unmapping)
 193     image->Unmap();
 194
 195   return PP_OK;
 196 }
 197
 198 // CAUTION: This code is subtle because Navigate is a sync call which may
 199 // cause re-entrancy or cause the instance to be destroyed. If the instance
 200 // is destroyed we need to ensure that we respond to all outstanding sync
 201 // messages so that the plugin process does not remain blocked.
 202 int32_t PepperFlashRendererHost::OnNavigate(
 203     ppapi::host::HostMessageContext* host_context,
 204     const ppapi::URLRequestInfoData& data,
 205     const std::string& target,
 206     bool from_user_action) {
 207   // If our PepperPluginInstance is already destroyed, just return a failure.
 208   content::PepperPluginInstance* plugin_instance =
 209       host_->GetPluginInstance(pp_instance());
 210   if (!plugin_instance)
 211     return PP_ERROR_FAILED;
 212
 213   // Navigate may call into Javascript (e.g. with a "javascript:" URL),
 214   // or do things like navigate away from the page, either one of which will
 215   // need to re-enter into the plugin. It is safe, because it is essentially
 216   // equivalent to NPN_GetURL, where Flash would expect re-entrancy.
 217   ppapi::proxy::HostDispatcher* host_dispatcher =
 218       ppapi::proxy::HostDispatcher::GetForInstance(pp_instance());
 219   host_dispatcher->set_allow_plugin_reentrancy();
 220
 221   // Grab a weak pointer to ourselves on the stack so we can check if we are
 222   // still alive.
 223   base::WeakPtr<PepperFlashRendererHost> weak_ptr = weak_factory_.GetWeakPtr();
 224   // Keep track of reply contexts in case we are destroyed during a Navigate
 225   // call. Even if we are destroyed, we still need to send these replies to
 226   // unblock the plugin process.
 227   navigate_replies_.push_back(host_context->MakeReplyMessageContext());
 228   plugin_instance->Navigate(data, target.c_str(), from_user_action);
 229   // This object might have been destroyed by this point. If it is destroyed
 230   // the reply will be sent in the destructor. Otherwise send the reply here.
 231   if (weak_ptr.get()) {
 232     SendReply(navigate_replies_.back(), IPC::Message());
 233     navigate_replies_.pop_back();
 234   }
 235
 236   // Return PP_OK_COMPLETIONPENDING so that no reply is automatically sent.
 237   return PP_OK_COMPLETIONPENDING;
 238 }
 239
 240 int32_t PepperFlashRendererHost::OnIsRectTopmost(
 241     ppapi::host::HostMessageContext* host_context,
 242     const PP_Rect& rect) {
 243   content::PepperPluginInstance* plugin_instance =
 244       host_->GetPluginInstance(pp_instance());
 245   if (plugin_instance && plugin_instance->IsRectTopmost(
 246       gfx::Rect(rect.point.x, rect.point.y,rect.size.width, rect.size.height)))
 247     return PP_OK;
 248   return PP_ERROR_FAILED;
 249 }
 250
 251 int32_t PepperFlashRendererHost::OnInvokePrinting(
 252     ppapi::host::HostMessageContext* host_context) {
 253   PPB_PDF_Impl::InvokePrintingForInstance(pp_instance());
 254   return PP_OK;
 255 }