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// 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/proxy/ppb_font_proxy.h"
#include "base/bind.h"
#include "base/debug/trace_event.h"
#include "ppapi/c/dev/ppb_font_dev.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/plugin_globals.h"
#include "ppapi/proxy/plugin_proxy_delegate.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/ppb_image_data_proxy.h"
#include "ppapi/proxy/serialized_var.h"
#include "ppapi/shared_impl/ppapi_preferences.h"
#include "ppapi/shared_impl/resource.h"
#include "ppapi/shared_impl/var.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_image_data_api.h"
#include "ppapi/thunk/thunk.h"
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_Font_API;
using ppapi::thunk::PPB_Font_FunctionAPI;
using ppapi::thunk::PPB_ImageData_API;
namespace ppapi {
namespace proxy {
namespace {
bool PPTextRunToTextRun(const PP_TextRun_Dev* run,
WebKitForwarding::Font::TextRun* output) {
StringVar* str = StringVar::FromPPVar(run->text);
if (!str)
return false;
output->text = str->value();
output->rtl = PP_ToBool(run->rtl);
output->override_direction = PP_ToBool(run->override_direction);
return true;
}
} // namespace
PPB_Font_Proxy::PPB_Font_Proxy(Dispatcher* dispatcher)
: InterfaceProxy(dispatcher) {
}
PPB_Font_Proxy::~PPB_Font_Proxy() {
}
PPB_Font_FunctionAPI* PPB_Font_Proxy::AsPPB_Font_FunctionAPI() {
return this;
}
PP_Var PPB_Font_Proxy::GetFontFamilies(PP_Instance instance) {
PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
if (!dispatcher)
return PP_MakeUndefined();
// Assume the font families don't change, so we can cache the result globally.
CR_DEFINE_STATIC_LOCAL(std::string, families, ());
if (families.empty()) {
PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
new PpapiHostMsg_PPBFont_GetFontFamilies(&families));
}
return StringVar::StringToPPVar(families);
}
bool PPB_Font_Proxy::OnMessageReceived(const IPC::Message& msg) {
// There aren't any font messages.
NOTREACHED();
return false;
}
Font::Font(const HostResource& resource,
const PP_FontDescription_Dev& desc)
: Resource(resource),
webkit_event_(false, false),
font_forwarding_(NULL) {
TRACE_EVENT0("ppapi proxy", "Font::Font");
StringVar* face = StringVar::FromPPVar(desc.face);
PluginDispatcher* dispatcher = PluginDispatcher::GetForResource(this);
if (!dispatcher)
return;
WebKitForwarding* forwarding =
PluginGlobals::Get()->plugin_proxy_delegate()->GetWebKitForwarding();
RunOnWebKitThread(true,
base::Bind(&WebKitForwarding::CreateFontForwarding,
base::Unretained(forwarding),
&webkit_event_, desc,
face ? face->value() : std::string(),
dispatcher->preferences(),
&font_forwarding_));
}
Font::~Font() {
if (font_forwarding_) {
RunOnWebKitThread(false,
base::Bind(&DeleteFontForwarding, font_forwarding_));
}
}
PPB_Font_API* Font::AsPPB_Font_API() {
return this;
}
PP_Bool Font::Describe(PP_FontDescription_Dev* description,
PP_FontMetrics_Dev* metrics) {
TRACE_EVENT0("ppapi proxy", "Font::Describe");
std::string face;
PP_Bool result = PP_FALSE;
if (font_forwarding_) {
RunOnWebKitThread(true,
base::Bind(&WebKitForwarding::Font::Describe,
base::Unretained(font_forwarding_),
&webkit_event_, description, &face, metrics,
&result));
}
if (PP_ToBool(result))
description->face = StringVar::StringToPPVar(face);
else
description->face = PP_MakeUndefined();
return result;
}
PP_Bool Font::DrawTextAt(PP_Resource pp_image_data,
const PP_TextRun_Dev* text,
const PP_Point* position,
uint32_t color,
const PP_Rect* clip,
PP_Bool image_data_is_opaque) {
TRACE_EVENT0("ppapi proxy", "Font::DrawTextAt");
if (!font_forwarding_)
return PP_FALSE;
// Convert to an ImageData object.
EnterResourceNoLock<PPB_ImageData_API> enter(pp_image_data, true);
if (enter.failed())
return PP_FALSE;
ImageData* image_data = static_cast<ImageData*>(enter.object());
skia::PlatformCanvas* canvas = image_data->mapped_canvas();
bool needs_unmapping = false;
if (!canvas) {
needs_unmapping = true;
image_data->Map();
canvas = image_data->mapped_canvas();
if (!canvas)
return PP_FALSE; // Failure mapping.
}
WebKitForwarding::Font::TextRun run;
if (!PPTextRunToTextRun(text, &run)) {
if (needs_unmapping)
image_data->Unmap();
return PP_FALSE;
}
RunOnWebKitThread(
true,
base::Bind(&WebKitForwarding::Font::DrawTextAt,
base::Unretained(font_forwarding_), &webkit_event_,
WebKitForwarding::Font::DrawTextParams(canvas, run, position,
color, clip,
image_data_is_opaque)));
if (needs_unmapping)
image_data->Unmap();
return PP_TRUE;
}
int32_t Font::MeasureText(const PP_TextRun_Dev* text) {
TRACE_EVENT0("ppapi proxy", "Font::MeasureText");
WebKitForwarding::Font::TextRun run;
if (!font_forwarding_ || !PPTextRunToTextRun(text, &run))
return -1;
int32_t result = -1;
RunOnWebKitThread(true,
base::Bind(&WebKitForwarding::Font::MeasureText,
base::Unretained(font_forwarding_),
&webkit_event_, run, &result));
return result;
}
uint32_t Font::CharacterOffsetForPixel(const PP_TextRun_Dev* text,
int32_t pixel_position) {
TRACE_EVENT0("ppapi proxy", "Font::CharacterOffsetForPixel");
WebKitForwarding::Font::TextRun run;
if (!font_forwarding_ || !PPTextRunToTextRun(text, &run))
return -1;
uint32_t result = -1;
RunOnWebKitThread(true,
base::Bind(&WebKitForwarding::Font::CharacterOffsetForPixel,
base::Unretained(font_forwarding_),
&webkit_event_, run, pixel_position, &result));
return result;
}
int32_t Font::PixelOffsetForCharacter(const PP_TextRun_Dev* text,
uint32_t char_offset) {
TRACE_EVENT0("ppapi proxy", "Font::PixelOffsetForCharacter");
WebKitForwarding::Font::TextRun run;
if (!font_forwarding_ || !PPTextRunToTextRun(text, &run))
return -1;
int32_t result = -1;
RunOnWebKitThread(true,
base::Bind(&WebKitForwarding::Font::PixelOffsetForCharacter,
base::Unretained(font_forwarding_),
&webkit_event_, run, char_offset, &result));
return result;
}
void Font::RunOnWebKitThread(bool blocking, const base::Closure& task) {
PluginGlobals::Get()->plugin_proxy_delegate()->PostToWebKitThread(
FROM_HERE, task);
if (blocking)
webkit_event_.Wait();
}
// static
void Font::DeleteFontForwarding(WebKitForwarding::Font* font_forwarding) {
delete font_forwarding;
}
} // namespace proxy
} // namespace ppapi
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