1 #include <cstdio> 2 #include <string> 3 4 #include "ppapi/cpp/completion_callback.h" 5 #include "ppapi/cpp/graphics_2d.h" 6 #include "ppapi/cpp/image_data.h" 7 #include "ppapi/cpp/instance.h" 8 #include "ppapi/cpp/module.h" 9 #include "ppapi/cpp/var.h" 10 11 #include "SampleApp.h" 12 #include "SkApplication.h" 13 #include "SkCanvas.h" 14 #include "SkBitmap.h" 15 #include "SkEvent.h" 16 #include "SkWindow.h" 17 18 class SkiaInstance; 19 20 namespace { 21 void FlushCallback(void* data, int32_t result); 22 } 23 24 SkiaInstance* gPluginInstance; 25 extern int main(int, char**); 26 27 class SkiaInstance : public pp::Instance { 28 public: 29 explicit SkiaInstance(PP_Instance instance) : pp::Instance(instance), 30 fFlushPending(false), 31 fGraphics2dContext(NULL), 32 fPixelBuffer(NULL) 33 { 34 gPluginInstance = this; 35 application_init(); 36 char* commandName = "SampleApp"; 37 fWindow = new SampleWindow(NULL, 0, &commandName, NULL); 38 } 39 40 virtual ~SkiaInstance() { 41 gPluginInstance = NULL; 42 delete fWindow; 43 application_term(); 44 } 45 46 virtual void HandleMessage(const pp::Var& var_message) { 47 // Receive a message from javascript. Right now this just signals us to 48 // get started. 49 uint32_t width = 500; 50 uint32_t height = 500; 51 char buffer[2048]; 52 sprintf(buffer, "SetSize:%d,%d", width, height); 53 PostMessage(buffer); 54 } 55 56 virtual void DidChangeView(const pp::Rect& position, 57 const pp::Rect& clip) { 58 if (position.size().width() == width() && 59 position.size().height() == height()) { 60 return; // Size didn't change, no need to update anything. 61 } 62 // Create a new device context with the new size. 63 DestroyContext(); 64 CreateContext(position.size()); 65 // Delete the old pixel buffer and create a new one. 66 delete fPixelBuffer; 67 fPixelBuffer = NULL; 68 if (fGraphics2dContext != NULL) { 69 fPixelBuffer = new pp::ImageData(this, 70 PP_IMAGEDATAFORMAT_BGRA_PREMUL, 71 fGraphics2dContext->size(), 72 false); 73 fWindow->resize(position.size().width(), position.size().height()); 74 fWindow->update(NULL); 75 paint(); 76 } 77 } 78 79 // Indicate whether a flush is pending. This can only be called from the 80 // main thread; it is not thread safe. 81 bool flush_pending() const { 82 return fFlushPending; 83 } 84 void set_flush_pending(bool flag) { 85 fFlushPending = flag; 86 } 87 88 void paint() { 89 if (fPixelBuffer) { 90 // Draw some stuff. TODO(borenet): Actually have SampleApp draw into 91 // the plugin area. 92 uint32_t w = fPixelBuffer->size().width(); 93 uint32_t h = fPixelBuffer->size().height(); 94 uint32_t* data = (uint32_t*) fPixelBuffer->data(); 95 // Create a bitmap using the fPixelBuffer pixels 96 SkBitmap bitmap; 97 bitmap.setConfig(SkBitmap::kARGB_8888_Config, w, h); 98 bitmap.setPixels(data); 99 // Create a canvas with the bitmap as the backend 100 SkCanvas canvas(bitmap); 101 102 canvas.drawColor(SK_ColorBLUE); 103 SkRect rect = SkRect::MakeXYWH(10, 10, 80, 80); 104 SkPaint rect_paint; 105 rect_paint.setStyle(SkPaint::kFill_Style); 106 rect_paint.setColor(SK_ColorRED); 107 canvas.drawRect(rect, rect_paint); 108 109 FlushPixelBuffer(); 110 } 111 } 112 113 private: 114 int width() const { 115 return fPixelBuffer ? fPixelBuffer->size().width() : 0; 116 } 117 118 int height() const { 119 return fPixelBuffer ? fPixelBuffer->size().height() : 0; 120 } 121 122 bool IsContextValid() const { 123 return fGraphics2dContext != NULL; 124 } 125 126 void CreateContext(const pp::Size& size) { 127 if (IsContextValid()) 128 return; 129 fGraphics2dContext = new pp::Graphics2D(this, size, false); 130 if (!BindGraphics(*fGraphics2dContext)) { 131 SkDebugf("Couldn't bind the device context"); 132 } 133 } 134 135 void DestroyContext() { 136 if (!IsContextValid()) 137 return; 138 delete fGraphics2dContext; 139 fGraphics2dContext = NULL; 140 } 141 142 void FlushPixelBuffer() { 143 if (!IsContextValid()) 144 return; 145 // Note that the pixel lock is held while the buffer is copied into the 146 // device context and then flushed. 147 fGraphics2dContext->PaintImageData(*fPixelBuffer, pp::Point()); 148 if (flush_pending()) 149 return; 150 set_flush_pending(true); 151 fGraphics2dContext->Flush(pp::CompletionCallback(&FlushCallback, this)); 152 } 153 154 bool fFlushPending; 155 pp::Graphics2D* fGraphics2dContext; 156 pp::ImageData* fPixelBuffer; 157 SampleWindow* fWindow; 158 }; 159 160 class SkiaModule : public pp::Module { 161 public: 162 SkiaModule() : pp::Module() {} 163 virtual ~SkiaModule() {} 164 165 virtual pp::Instance* CreateInstance(PP_Instance instance) { 166 gPluginInstance = new SkiaInstance(instance); 167 return gPluginInstance; 168 } 169 }; 170 171 namespace { 172 void FlushCallback(void* data, int32_t result) { 173 static_cast<SkiaInstance*>(data)->set_flush_pending(false); 174 } 175 } 176 177 namespace pp { 178 Module* CreateModule() { 179 return new SkiaModule(); 180 } 181 } // namespace pp 182 183 184 /////////////////////////////////////////// 185 ///////////// SkOSWindow impl ///////////// 186 /////////////////////////////////////////// 187 188 void SkOSWindow::onSetTitle(const char title[]) 189 { 190 char buffer[2048]; 191 sprintf(buffer, "SetTitle:%s", title); 192 gPluginInstance->PostMessage(buffer); 193 } 194 195 void SkOSWindow::onHandleInval(const SkIRect& rect) 196 { 197 gPluginInstance->paint(); 198 } 199 200 void SkOSWindow::onPDFSaved(const char title[], const char desc[], 201 const char path[]) { 202 } 203 204 /////////////////////////////////////////// 205 /////////////// SkEvent impl ////////////// 206 /////////////////////////////////////////// 207 208 void SkEvent::SignalQueueTimer(SkMSec ms) { 209 } 210 211 void SkEvent::SignalNonEmptyQueue() { 212 } 213
