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// Copyright 2013 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 "mojo/examples/sample_app/gles2_client_impl.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <math.h>
#include <stdlib.h>
#include "gpu/command_buffer/client/gles2_interface.h"
#include "mojo/public/c/gles2/gles2.h"
#include "mojo/public/cpp/environment/environment.h"
#include "mojo/public/cpp/utility/run_loop.h"
namespace examples {
namespace {
float CalculateDragDistance(const mojo::Point& start, const mojo::Point& end) {
return hypot(static_cast<float>(start.x - end.x),
static_cast<float>(start.y - end.y));
}
float GetRandomColor() {
return static_cast<float>(rand()) / static_cast<float>(RAND_MAX);
}
}
GLES2ClientImpl::GLES2ClientImpl(mojo::CommandBufferPtr command_buffer)
: last_time_(mojo::GetTimeTicksNow()), waiting_to_draw_(false) {
context_ =
MojoGLES2CreateContext(command_buffer.PassMessagePipe().release().value(),
&ContextLostThunk,
this,
mojo::Environment::GetDefaultAsyncWaiter());
MojoGLES2MakeCurrent(context_);
}
GLES2ClientImpl::~GLES2ClientImpl() {
MojoGLES2DestroyContext(context_);
}
void GLES2ClientImpl::SetSize(const mojo::Size& size) {
size_ = size;
if (size_.width == 0 || size_.height == 0)
return;
static_cast<gpu::gles2::GLES2Interface*>(
MojoGLES2GetGLES2Interface(context_))->ResizeCHROMIUM(size_.width,
size_.height,
1);
cube_.Init(size_.width, size_.height);
WantToDraw();
}
void GLES2ClientImpl::HandleInputEvent(const mojo::Event& event) {
switch (event.action) {
case mojo::EVENT_TYPE_MOUSE_PRESSED:
case mojo::EVENT_TYPE_TOUCH_PRESSED:
if (event.flags & mojo::EVENT_FLAGS_RIGHT_MOUSE_BUTTON)
break;
capture_point_ = *event.location_data->in_view_location;
last_drag_point_ = capture_point_;
drag_start_time_ = mojo::GetTimeTicksNow();
break;
case mojo::EVENT_TYPE_MOUSE_DRAGGED:
case mojo::EVENT_TYPE_TOUCH_MOVED: {
if (event.flags & mojo::EVENT_FLAGS_RIGHT_MOUSE_BUTTON)
break;
int direction =
(event.location_data->in_view_location->y < last_drag_point_.y ||
event.location_data->in_view_location->x > last_drag_point_.x)
? 1 : -1;
cube_.set_direction(direction);
cube_.UpdateForDragDistance(CalculateDragDistance(
last_drag_point_, *event.location_data->in_view_location));
WantToDraw();
last_drag_point_ = *event.location_data->in_view_location;
break;
}
case mojo::EVENT_TYPE_MOUSE_RELEASED:
case mojo::EVENT_TYPE_TOUCH_RELEASED: {
if (event.flags & mojo::EVENT_FLAGS_RIGHT_MOUSE_BUTTON) {
cube_.set_color(GetRandomColor(), GetRandomColor(), GetRandomColor());
break;
}
MojoTimeTicks offset = mojo::GetTimeTicksNow() - drag_start_time_;
float delta = static_cast<float>(offset) / 1000000.;
cube_.SetFlingMultiplier(CalculateDragDistance(
capture_point_, *event.location_data->in_view_location), delta);
capture_point_ = last_drag_point_ = mojo::Point();
WantToDraw();
break;
}
default:
break;
}
}
void GLES2ClientImpl::ContextLost() {
}
void GLES2ClientImpl::ContextLostThunk(void* closure) {
static_cast<GLES2ClientImpl*>(closure)->ContextLost();
}
struct DrawRunnable {
explicit DrawRunnable(GLES2ClientImpl* impl) : impl(impl) {}
virtual ~DrawRunnable() {}
void Run() const { impl->Draw(); }
GLES2ClientImpl* impl;
};
void GLES2ClientImpl::WantToDraw() {
if (waiting_to_draw_)
return;
waiting_to_draw_ = true;
mojo::RunLoop::current()->PostDelayedTask(mojo::Closure(DrawRunnable(this)),
MojoTimeTicks(16667));
}
void GLES2ClientImpl::Draw() {
waiting_to_draw_ = false;
MojoTimeTicks now = mojo::GetTimeTicksNow();
MojoTimeTicks offset = now - last_time_;
float delta = static_cast<float>(offset) / 1000000.;
last_time_ = now;
cube_.UpdateForTimeDelta(delta);
cube_.Draw();
MojoGLES2SwapBuffers();
WantToDraw();
}
} // namespace examples
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