SkHello for NaCl

platform_tools/nacl/src/nacl_hello.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/graphics_2d.h"
 #include "ppapi/cpp/image_data.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/point.h"
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/var.h"
 
-#include "SkBase64.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColor.h"
-#include "SkDebugger.h"
 #include "SkGraphics.h"
 #include "SkStream.h"
 #include "SkString.h"
 
 class SkiaInstance;
 
 // Used by SkDebugf
 SkiaInstance* gPluginInstance;
 
 void FlushCallback(void* data, int32_t result);
 
+static void doDraw(SkCanvas* canvas, const SkPaint& paint, const char text[]) {
+    canvas->drawColor(SK_ColorWHITE);
+    SkPaint red;
+    red.setColor(SK_ColorRED);
+    canvas->drawCircle(150.0, 150.0, 100.0, red);
+    SkRect bounds;
+    canvas->getClipBounds(&bounds);
+    canvas->drawText(text, strlen(text),
+                     bounds.centerX(), bounds.centerY(),
+                     paint);
+}
+
 // Skia's subclass of pp::Instance, our interface with the browser.
 class SkiaInstance : public pp::Instance {
 public:
     explicit SkiaInstance(PP_Instance instance)
         : pp::Instance(instance)
         , fCanvas(NULL)
-        , fPicture(NULL)
         , fFlushLoopRunning(false)
         , fFlushPending(false)
-
     {
         gPluginInstance = this;
         SkGraphics::Init();
     }
 
     virtual ~SkiaInstance() {
         SkGraphics::Term();
         gPluginInstance = NULL;
     }
 
     virtual void HandleMessage(const pp::Var& var_message) {
         // Receive a message from javascript.
-        if (var_message.is_string()) {
-            SkString msg(var_message.AsString().c_str());
-            if (msg.startsWith("init")) {
-            } else if (msg.startsWith("LoadSKP")) {
-                size_t startIndex = strlen("LoadSKP");
-                size_t dataSize = msg.size()/sizeof(char) - startIndex;
-                SkBase64 decodedData;
-                decodedData.decode(msg.c_str() + startIndex, dataSize);
-                size_t decodedSize = 3 * (dataSize / 4);
-                SkDebugf("Got size: %d\n", decodedSize);
-                if (!decodedData.getData()) {
-                    SkDebugf("Failed to decode SKP\n");
-                    return;
-                }
-                SkMemoryStream pictureStream(decodedData.getData(), decodedSize);
-                fPicture = new SkPicture(&pictureStream);
-                if (fPicture->width() == 0 || fPicture->height() == 0) {
-                    SkDebugf("Failed to create SKP.\n");
-                    return;
-                }
-                fDebugger.loadPicture(fPicture);
-
-                // Set up the command list.
-                SkTArray<SkString>* commands = fDebugger.getDrawCommandsAsStrings();
-                PostMessage("ClearCommands");
-                for (int i = 0; i < commands->count(); ++i) {
-                    SkString addCommand("AddCommand:");
-                    addCommand.append((*commands)[i]);
-                    PostMessage(addCommand.c_str());
-                }
-                PostMessage("UpdateCommands");
-
-                // Set the overview text.
-                SkString overviewText;
-                fDebugger.getOverviewText(NULL, 0.0, &overviewText, 1);
-                overviewText.prepend("SetOverview:");
-                PostMessage(overviewText.c_str());
-
-                // Draw the SKP.
-                if (!fFlushLoopRunning) {
-                    Paint();
-                }
-            } else if (msg.startsWith("CommandSelected:")) {
-                size_t startIndex = strlen("CommandSelected:");
-                int index = atoi(msg.c_str() + startIndex);
-                fDebugger.setIndex(index);
-                if (!fFlushLoopRunning) {
-                    Paint();
-                }
-            } else if (msg.startsWith("Rewind")) {
-                fCanvas->clear(SK_ColorWHITE);
-                fDebugger.setIndex(0);
-                if (!fFlushLoopRunning) {
-                    Paint();
-                }
-            } else if (msg.startsWith("StepBack")) {
-                fCanvas->clear(SK_ColorWHITE);
-                int currentIndex = fDebugger.index();
-                if (currentIndex > 1) {
-                    fDebugger.setIndex(currentIndex - 1);
-                    if (!fFlushLoopRunning) {
-                        Paint();
-                    }
-                }
-            } else if (msg.startsWith("Pause")) {
-                // TODO(borenet)
-            } else if (msg.startsWith("StepForward")) {
-                int currentIndex = fDebugger.index();
-                if (currentIndex < fDebugger.getSize() -1) {
-                    fDebugger.setIndex(currentIndex + 1);
-                    if (!fFlushLoopRunning) {
-                        Paint();
-                    }
-                }
-            } else if (msg.startsWith("Play")) {
-                fDebugger.setIndex(fDebugger.getSize() - 1);
-                if (!fFlushLoopRunning) {
-                    Paint();
-                }
-            }
-        }
     }
 
     void Paint() {
         if (!fImage.is_null()) {
-            fDebugger.draw(fCanvas);
+            SkPaint paint;
+            paint.setAntiAlias(true);
+            paint.setTextSize(SkIntToScalar(30));
+            paint.setTextAlign(SkPaint::kCenter_Align);
+            doDraw(fCanvas, paint, "Hello");
+
             fDeviceContext.PaintImageData(fImage, pp::Point(0, 0));
             if (!fFlushPending) {
                 fFlushPending = true;
                 fDeviceContext.Flush(pp::CompletionCallback(&FlushCallback, this));
             } else {
                 SkDebugf("A flush is pending... Skipping flush.\n");
             }
         } else {
             SkDebugf("No pixels to write to!\n");
         }
     }
 
     virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip) {
         if (position.size().width() == fWidth &&
             position.size().height() == fHeight) {
             return;  // We don't care about the position, only the size.
         }
         fWidth = position.size().width();
         fHeight = position.size().height();
-
         fDeviceContext = pp::Graphics2D(this, pp::Size(fWidth, fHeight), false);
         if (!BindGraphics(fDeviceContext)) {
             SkDebugf("Couldn't bind the device context\n");
             return;
         }
         fImage = pp::ImageData(this,
                                PP_IMAGEDATAFORMAT_BGRA_PREMUL,
                                pp::Size(fWidth, fHeight), false);
         fBitmap.setConfig(SkBitmap::kARGB_8888_Config, fWidth, fHeight);
         fBitmap.setPixels(fImage.data());
@@ skipping 14 matching lines @@
     }
 
 private:
     pp::Graphics2D fDeviceContext;
     pp::ImageData fImage;
     int fWidth;
     int fHeight;
 
     SkBitmap fBitmap;
     SkCanvas* fCanvas;
-    SkDebugger fDebugger;
-    SkPicture* fPicture;
 
     bool fFlushLoopRunning;
     bool fFlushPending;
 };
 
 void FlushCallback(void* data, int32_t result) {
     static_cast<SkiaInstance*>(data)->OnFlush();
 }
 
 class SkiaModule : public pp::Module {
 public:
     SkiaModule() : pp::Module() {}
     virtual ~SkiaModule() {}
 
     virtual pp::Instance* CreateInstance(PP_Instance instance) {
         return new SkiaInstance(instance);
     }
 };
 
 namespace pp {
 Module* CreateModule() {
     return new SkiaModule();
 }
 }  // namespace pp