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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 "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/logging.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/private/flash.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/size.h"
#include "ppapi/utility/completion_callback_factory.h"
const int32_t kTimerInterval = 200;
class MyInstance : public pp::Instance {
public:
explicit MyInstance(PP_Instance instance)
: pp::Instance(instance),
callback_factory_(this),
pending_paint_(false),
waiting_for_flush_completion_(false) {
}
virtual ~MyInstance() {
}
virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
ScheduleNextTimer();
return true;
}
virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip) {
if (position.size() != size_) {
size_ = position.size();
device_context_ = pp::Graphics2D(this, size_, false);
if (!BindGraphics(device_context_))
return;
}
Paint();
}
private:
void ScheduleNextTimer() {
pp::Module::Get()->core()->CallOnMainThread(
kTimerInterval,
callback_factory_.NewRequiredCallback(&MyInstance::OnTimer),
0);
}
void OnTimer(int32_t) {
ScheduleNextTimer();
Paint();
}
void DidFlush(int32_t result) {
waiting_for_flush_completion_ = false;
if (pending_paint_)
Paint();
}
void Paint() {
if (waiting_for_flush_completion_) {
pending_paint_ = true;
return;
}
pending_paint_ = false;
if (size_.IsEmpty())
return; // Nothing to do.
pp::ImageData image = PaintImage(size_);
if (!image.is_null()) {
device_context_.ReplaceContents(&image);
waiting_for_flush_completion_ = true;
device_context_.Flush(
callback_factory_.NewRequiredCallback(&MyInstance::DidFlush));
}
}
pp::ImageData PaintImage(const pp::Size& size) {
pp::ImageData image(this, PP_IMAGEDATAFORMAT_BGRA_PREMUL, size, false);
if (image.is_null())
return image;
pp::Rect rect(size.width() / 8, size.height() / 4,
3 * size.width() / 4, size.height() / 2);
uint32_t fill_color = pp::flash::Flash::IsRectTopmost(this, rect) ?
0xff00ff00 : 0xffff0000;
for (int y = 0; y < size.height(); y++) {
for (int x = 0; x < size.width(); x++)
*image.GetAddr32(pp::Point(x, y)) = fill_color;
}
for (int x = rect.x(); x < rect.x() + rect.width(); x++) {
*image.GetAddr32(pp::Point(x, rect.y())) = 0xff202020;
*image.GetAddr32(pp::Point(x, rect.y() + rect.height() - 1)) = 0xff202020;
}
for (int y = rect.y(); y < rect.y() + rect.height(); y++) {
*image.GetAddr32(pp::Point(rect.x(), y)) = 0xff202020;
*image.GetAddr32(pp::Point(rect.x() + rect.width() - 1, y)) = 0xff202020;
}
return image;
}
pp::CompletionCallbackFactory<MyInstance> callback_factory_;
int32_t timer_interval_;
// Painting stuff.
pp::Size size_;
pp::Graphics2D device_context_;
bool pending_paint_;
bool waiting_for_flush_completion_;
};
class MyModule : public pp::Module {
public:
virtual pp::Instance* CreateInstance(PP_Instance instance) {
return new MyInstance(instance);
}
};
namespace pp {
// Factory function for your specialization of the Module object.
Module* CreateModule() {
return new MyModule();
}
} // namespace pp
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