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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 <cmath>
#include "ppapi/c/ppb_fullscreen.h"
#include "ppapi/c/ppb_input_event.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/fullscreen.h"
#include "ppapi/cpp/mouse_lock.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/input_event.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/var.h"
#include "ppapi/utility/completion_callback_factory.h"
namespace mouselock {
class MouseLockInstance : public pp::Instance, public pp::MouseLock {
public:
explicit MouseLockInstance(PP_Instance instance)
: pp::Instance(instance),
pp::MouseLock(this),
width_(0),
height_(0),
mouse_locked_(false),
waiting_for_flush_completion_(false),
callback_factory_(this),
fullscreen_(this),
is_context_bound_(false),
background_scanline_(NULL) {
}
virtual ~MouseLockInstance();
// Called by the browser when the NaCl module is loaded and all ready to go.
virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]);
// Called by the browser to handle incoming input events.
virtual bool HandleInputEvent(const pp::InputEvent& event);
// Called whenever the in-browser window changes size.
virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip);
// Called by the browser when mouselock is lost. This happens when the NaCl
// module exits fullscreen mode.
virtual void MouseLockLost();
private:
// Return the Cartesian distance between two points.
double GetDistance(int point_1_x, int point_1_y,
int point_2_x, int point_2_y) {
return sqrt(pow(static_cast<double>(point_1_x - point_2_x), 2) +
pow(static_cast<double>(point_1_y - point_2_y), 2));
}
// Called when mouse lock has been acquired. Used as a callback to
// pp::MouseLock.LockMouse().
void DidLockMouse(int32_t result);
// Called when the 2D context has been flushed to the browser window. Used
// as a callback to pp::Graphics2D.Flush().
void DidFlush(int32_t result);
// Creates a new paint buffer, paints it then flush it to the 2D context. If
// a flush is pending, this does nothing.
void Paint();
// Create a new pp::ImageData and paint the graphics that represent the mouse
// movement in it. Return the new pp::ImageData.
pp::ImageData PaintImage(int width, int height);
// Fill the image with the backgroud color.
void ClearToBackground(pp::ImageData* image);
// Draw a spot in |spot_color| in the center of the image. The radius of the
// spot is defined by a constant value in mouselock.cc
void DrawCenterSpot(pp::ImageData* image, uint32_t spot_color);
// Draw the needle when the mouse is outside of the central spot.
void DrawNeedle(pp::ImageData* image, uint32_t needle_color);
// Print the printf-style format to the "console" via PostMessage.
void Log(const char* format, ...);
int width_;
int height_;
bool mouse_locked_;
pp::Point mouse_movement_;
bool waiting_for_flush_completion_;
pp::CompletionCallbackFactory<MouseLockInstance> callback_factory_;
pp::Fullscreen fullscreen_;
pp::Graphics2D device_context_;
bool is_context_bound_;
uint32_t* background_scanline_;
};
} // namespace mouselock
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