1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <cmath> 6 7 #include "ppapi/c/ppb_fullscreen.h" 8 #include "ppapi/c/ppb_input_event.h" 9 #include "ppapi/cpp/completion_callback.h" 10 #include "ppapi/cpp/fullscreen.h" 11 #include "ppapi/cpp/graphics_2d.h" 12 #include "ppapi/cpp/image_data.h" 13 #include "ppapi/cpp/input_event.h" 14 #include "ppapi/cpp/instance.h" 15 #include "ppapi/cpp/module.h" 16 #include "ppapi/cpp/mouse_lock.h" 17 #include "ppapi/cpp/rect.h" 18 #include "ppapi/cpp/size.h" 19 #include "ppapi/cpp/var.h" 20 #include "ppapi/utility/completion_callback_factory.h" 21 22 #ifdef _MSC_VER 23 // Allow 'this' in initializer list 24 #pragma warning(disable : 4355) 25 #endif 26 27 class MouseLockInstance : public pp::Instance, public pp::MouseLock { 28 public: 29 explicit MouseLockInstance(PP_Instance instance) 30 : pp::Instance(instance), 31 pp::MouseLock(this), 32 mouse_locked_(false), 33 waiting_for_flush_completion_(false), 34 callback_factory_(this), 35 fullscreen_(this), 36 is_context_bound_(false), 37 was_fullscreen_(false), 38 background_scanline_(NULL) {} 39 virtual ~MouseLockInstance(); 40 41 // Called by the browser when the NaCl module is loaded and all ready to go. 42 virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]); 43 44 // Called by the browser to handle incoming input events. 45 virtual bool HandleInputEvent(const pp::InputEvent& event); 46 47 // Called whenever the in-browser window changes size. 48 virtual void DidChangeView(const pp::View& view); 49 50 // Called by the browser when mouselock is lost. This happens when the NaCl 51 // module exits fullscreen mode. 52 virtual void MouseLockLost(); 53 54 private: 55 // Return the Cartesian distance between two points. 56 double GetDistance(int point_1_x, 57 int point_1_y, 58 int point_2_x, 59 int point_2_y) { 60 return sqrt(pow(static_cast<double>(point_1_x - point_2_x), 2) + 61 pow(static_cast<double>(point_1_y - point_2_y), 2)); 62 } 63 64 // Called when mouse lock has been acquired. Used as a callback to 65 // pp::MouseLock.LockMouse(). 66 void DidLockMouse(int32_t result); 67 68 // Called when the 2D context has been flushed to the browser window. Used 69 // as a callback to pp::Graphics2D.Flush(). 70 void DidFlush(int32_t result); 71 72 // Creates a new paint buffer, paints it then flush it to the 2D context. If 73 // a flush is pending, this does nothing. 74 void Paint(); 75 76 // Create a new pp::ImageData and paint the graphics that represent the mouse 77 // movement in it. Return the new pp::ImageData. 78 pp::ImageData PaintImage(const pp::Size& size); 79 80 // Fill the image with the background color. 81 void ClearToBackground(pp::ImageData* image); 82 83 void DrawCenterSpot(pp::ImageData* image, uint32_t spot_color); 84 85 void DrawNeedle(pp::ImageData* image, uint32_t needle_color); 86 87 // Print the printf-style format to the "console" via PostMessage. 88 void Log(const char* format, ...); 89 90 pp::Size size_; 91 92 bool mouse_locked_; 93 pp::Point mouse_movement_; 94 bool waiting_for_flush_completion_; 95 pp::CompletionCallbackFactory<MouseLockInstance> callback_factory_; 96 97 pp::Fullscreen fullscreen_; 98 pp::Graphics2D device_context_; 99 bool is_context_bound_; 100 bool was_fullscreen_; 101 uint32_t* background_scanline_; 102 }; 103
