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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 <GLES2/gl2.h>
#include "gpu/demos/framework/demo.h"
#include "gpu/demos/framework/demo_factory.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/graphics_3d.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/size.h"
#include "ppapi/lib/gl/gles2/gl2ext_ppapi.h"
namespace gpu {
namespace demos {
class PluginInstance : public pp::Instance {
public:
PluginInstance(PP_Instance instance, pp::Module* module)
: pp::Instance(instance),
module_(module),
demo_(CreateDemo()),
swap_pending_(false),
paint_needed_(false),
resize_needed_(false) {
// Set the callback object outside of the initializer list to avoid a
// compiler warning about using "this" in an initializer list.
callback_factory_.Initialize(this);
}
~PluginInstance() {
if (!context_.is_null()) {
glSetCurrentContextPPAPI(context_.pp_resource());
delete demo_;
glSetCurrentContextPPAPI(0);
}
}
virtual void DidChangeView(const pp::Rect& position,
const pp::Rect& /*clip*/) {
if (size_ == position.size())
return;
size_ = position.size();
if (context_.is_null())
CreateContext();
else
resize_needed_ = true;
Paint();
}
void Paint() {
if (swap_pending_) {
// A swap is pending. Delay paint until swap finishes.
paint_needed_ = true;
return;
}
if (resize_needed_) {
context_.ResizeBuffers(size_.width(), size_.height());
demo_->Resize(size_.width(), size_.height());
resize_needed_ = false;
}
glSetCurrentContextPPAPI(context_.pp_resource());
demo_->Draw();
glSetCurrentContextPPAPI(0);
swap_pending_ = true;
context_.SwapBuffers(
callback_factory_.NewCallback(&PluginInstance::OnSwap));
}
private:
void CreateContext() {
int32_t attribs[] = {
PP_GRAPHICS3DATTRIB_ALPHA_SIZE, 8,
PP_GRAPHICS3DATTRIB_DEPTH_SIZE, 24,
PP_GRAPHICS3DATTRIB_STENCIL_SIZE, 8,
PP_GRAPHICS3DATTRIB_SAMPLES, 0,
PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS, 0,
PP_GRAPHICS3DATTRIB_WIDTH, size_.width(),
PP_GRAPHICS3DATTRIB_HEIGHT, size_.height(),
PP_GRAPHICS3DATTRIB_NONE
};
context_ = pp::Graphics3D(this, attribs);
if (context_.is_null())
return;
pp::Instance::BindGraphics(context_);
glSetCurrentContextPPAPI(context_.pp_resource());
demo_->InitGL();
demo_->Resize(size_.width(), size_.height());
glSetCurrentContextPPAPI(0);
}
void OnSwap(int32_t) {
swap_pending_ = false;
if (paint_needed_ || demo_->IsAnimated()) {
paint_needed_ = false;
Paint();
}
}
pp::Module* module_;
Demo* demo_;
pp::Graphics3D context_;
pp::Size size_;
bool swap_pending_;
bool paint_needed_;
bool resize_needed_;
pp::CompletionCallbackFactory<PluginInstance> callback_factory_;
};
class PluginModule : public pp::Module {
public:
PluginModule() {}
~PluginModule() {
glTerminatePPAPI();
}
virtual bool Init() {
return glInitializePPAPI(get_browser_interface()) == GL_TRUE ? true : false;
}
virtual pp::Instance* CreateInstance(PP_Instance instance) {
return new PluginInstance(instance, this);
}
};
} // namespace demos
} // namespace gpu
namespace pp {
Module* CreateModule() {
return new gpu::demos::PluginModule();
}
} // namespace pp
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