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// Copyright (c) 2012 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 "chrome/renderer/pepper/pepper_flash_renderer_host.h"
#include <vector>
#include "chrome/renderer/pepper/ppb_pdf_impl.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/renderer_ppapi_host.h"
#include "googleurl/src/gurl.h"
#include "ipc/ipc_message_macros.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/trusted/ppb_browser_font_trusted.h"
#include "ppapi/host/dispatch_host_message.h"
#include "ppapi/proxy/host_dispatcher.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/resource_message_params.h"
#include "ppapi/proxy/serialized_structs.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_image_data_api.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkPoint.h"
#include "third_party/skia/include/core/SkTemplates.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "ui/gfx/rect.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
#include "webkit/plugins/ppapi/ppb_image_data_impl.h"
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_ImageData_API;
namespace chrome {
PepperFlashRendererHost::PepperFlashRendererHost(
content::RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource)
: ResourceHost(host->GetPpapiHost(), instance, resource),
weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
host_(host) {
}
PepperFlashRendererHost::~PepperFlashRendererHost() {
// This object may be destroyed in the middle of a sync message. If that is
// the case, make sure we respond to all the pending navigate calls.
std::vector<ppapi::host::ReplyMessageContext>::reverse_iterator it;
for (it = navigate_replies_.rbegin(); it != navigate_replies_.rend(); ++it)
SendReply(*it, IPC::Message());
}
int32_t PepperFlashRendererHost::OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) {
IPC_BEGIN_MESSAGE_MAP(PepperFlashRendererHost, msg)
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_GetProxyForURL,
OnGetProxyForURL);
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_SetInstanceAlwaysOnTop,
OnSetInstanceAlwaysOnTop);
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_DrawGlyphs,
OnDrawGlyphs);
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_Navigate,
OnNavigate);
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_IsRectTopmost,
OnIsRectTopmost);
PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_Flash_InvokePrinting,
OnInvokePrinting);
IPC_END_MESSAGE_MAP()
return PP_ERROR_FAILED;
}
int32_t PepperFlashRendererHost::OnGetProxyForURL(
ppapi::host::HostMessageContext* host_context,
const std::string& url) {
GURL gurl(url);
if (!gurl.is_valid())
return PP_ERROR_FAILED;
std::string proxy;
bool result = content::RenderThread::Get()->ResolveProxy(gurl, &proxy);
if (!result)
return PP_ERROR_FAILED;
host_context->reply_msg = PpapiPluginMsg_Flash_GetProxyForURLReply(proxy);
return PP_OK;
}
int32_t PepperFlashRendererHost::OnSetInstanceAlwaysOnTop(
ppapi::host::HostMessageContext* host_context,
bool on_top) {
webkit::ppapi::PluginInstance* plugin_instance =
host_->GetPluginInstance(pp_instance());
if (plugin_instance)
plugin_instance->set_always_on_top(on_top);
// Since no reply is sent for this message, it doesn't make sense to return an
// error.
return PP_OK;
}
int32_t PepperFlashRendererHost::OnDrawGlyphs(
ppapi::host::HostMessageContext* host_context,
ppapi::proxy::PPBFlash_DrawGlyphs_Params params) {
if (params.glyph_indices.size() != params.glyph_advances.size() ||
params.glyph_indices.empty())
return PP_ERROR_FAILED;
EnterResourceNoLock<PPB_ImageData_API> enter(
params.image_data.host_resource(), true);
if (enter.failed())
return PP_ERROR_FAILED;
webkit::ppapi::PPB_ImageData_Impl* image_resource =
static_cast<webkit::ppapi::PPB_ImageData_Impl*>(enter.object());
webkit::ppapi::ImageDataAutoMapper mapper(image_resource);
if (!mapper.is_valid())
return PP_ERROR_FAILED;
// Set up the typeface.
int style = SkTypeface::kNormal;
if (static_cast<PP_BrowserFont_Trusted_Weight>(params.font_desc.weight) >=
PP_BROWSERFONT_TRUSTED_WEIGHT_BOLD)
style |= SkTypeface::kBold;
if (params.font_desc.italic)
style |= SkTypeface::kItalic;
skia::RefPtr<SkTypeface> typeface = skia::AdoptRef(
SkTypeface::CreateFromName(params.font_desc.face.c_str(),
static_cast<SkTypeface::Style>(style)));
if (!typeface)
return PP_ERROR_FAILED;
// Set up the canvas.
SkCanvas* canvas = image_resource->GetPlatformCanvas();
SkAutoCanvasRestore acr(canvas, true);
// Clip is applied in pixels before the transform.
SkRect clip_rect = {
SkIntToScalar(params.clip.point.x),
SkIntToScalar(params.clip.point.y),
SkIntToScalar(params.clip.point.x + params.clip.size.width),
SkIntToScalar(params.clip.point.y + params.clip.size.height)
};
canvas->clipRect(clip_rect);
// Convert & set the matrix.
SkMatrix matrix;
matrix.set(SkMatrix::kMScaleX, SkFloatToScalar(params.transformation[0][0]));
matrix.set(SkMatrix::kMSkewX, SkFloatToScalar(params.transformation[0][1]));
matrix.set(SkMatrix::kMTransX, SkFloatToScalar(params.transformation[0][2]));
matrix.set(SkMatrix::kMSkewY, SkFloatToScalar(params.transformation[1][0]));
matrix.set(SkMatrix::kMScaleY, SkFloatToScalar(params.transformation[1][1]));
matrix.set(SkMatrix::kMTransY, SkFloatToScalar(params.transformation[1][2]));
matrix.set(SkMatrix::kMPersp0, SkFloatToScalar(params.transformation[2][0]));
matrix.set(SkMatrix::kMPersp1, SkFloatToScalar(params.transformation[2][1]));
matrix.set(SkMatrix::kMPersp2, SkFloatToScalar(params.transformation[2][2]));
canvas->concat(matrix);
SkPaint paint;
paint.setColor(params.color);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
paint.setAntiAlias(true);
paint.setHinting(SkPaint::kFull_Hinting);
paint.setTextSize(SkIntToScalar(params.font_desc.size));
paint.setTypeface(typeface.get()); // Takes a ref and manages lifetime.
if (params.allow_subpixel_aa) {
paint.setSubpixelText(true);
paint.setLCDRenderText(true);
}
SkScalar x = SkIntToScalar(params.position.x);
SkScalar y = SkIntToScalar(params.position.y);
// Build up the skia advances.
size_t glyph_count = params.glyph_indices.size();
if (glyph_count == 0)
return PP_OK;
std::vector<SkPoint> storage;
storage.resize(glyph_count);
SkPoint* sk_positions = &storage[0];
for (uint32_t i = 0; i < glyph_count; i++) {
sk_positions[i].set(x, y);
x += SkFloatToScalar(params.glyph_advances[i].x);
y += SkFloatToScalar(params.glyph_advances[i].y);
}
canvas->drawPosText(¶ms.glyph_indices[0], glyph_count * 2, sk_positions,
paint);
return PP_OK;
}
// CAUTION: This code is subtle because Navigate is a sync call which may
// cause re-entrancy or cause the instance to be destroyed. If the instance
// is destroyed we need to ensure that we respond to all outstanding sync
// messages so that the plugin process does not remain blocked.
int32_t PepperFlashRendererHost::OnNavigate(
ppapi::host::HostMessageContext* host_context,
const ppapi::URLRequestInfoData& data,
const std::string& target,
bool from_user_action) {
// If our PluginInstance is already destroyed, just return a failure.
webkit::ppapi::PluginInstance* plugin_instance =
host_->GetPluginInstance(pp_instance());
if (!plugin_instance)
return PP_ERROR_FAILED;
// Navigate may call into Javascript (e.g. with a "javascript:" URL),
// or do things like navigate away from the page, either one of which will
// need to re-enter into the plugin. It is safe, because it is essentially
// equivalent to NPN_GetURL, where Flash would expect re-entrancy.
ppapi::proxy::HostDispatcher* host_dispatcher =
ppapi::proxy::HostDispatcher::GetForInstance(pp_instance());
host_dispatcher->set_allow_plugin_reentrancy();
// Grab a weak pointer to ourselves on the stack so we can check if we are
// still alive.
base::WeakPtr<PepperFlashRendererHost> weak_ptr = weak_factory_.GetWeakPtr();
// Keep track of reply contexts in case we are destroyed during a Navigate
// call. Even if we are destroyed, we still need to send these replies to
// unblock the plugin process.
navigate_replies_.push_back(host_context->MakeReplyMessageContext());
plugin_instance->Navigate(data, target.c_str(), from_user_action);
// This object might have been destroyed by this point. If it is destroyed
// the reply will be sent in the destructor. Otherwise send the reply here.
if (weak_ptr) {
SendReply(navigate_replies_.back(), IPC::Message());
navigate_replies_.pop_back();
}
// Return PP_OK_COMPLETIONPENDING so that no reply is automatically sent.
return PP_OK_COMPLETIONPENDING;
}
int32_t PepperFlashRendererHost::OnIsRectTopmost(
ppapi::host::HostMessageContext* host_context,
const PP_Rect& rect) {
webkit::ppapi::PluginInstance* plugin_instance =
host_->GetPluginInstance(pp_instance());
if (plugin_instance && plugin_instance->IsRectTopmost(
gfx::Rect(rect.point.x, rect.point.y,rect.size.width, rect.size.height)))
return PP_OK;
return PP_ERROR_FAILED;
}
int32_t PepperFlashRendererHost::OnInvokePrinting(
ppapi::host::HostMessageContext* host_context) {
PPB_PDF_Impl::InvokePrintingForInstance(pp_instance());
return PP_OK;
}
} // namespace chrome
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