ppapi/tests/power_saver_test_plugin.cc

   1 // Copyright 2015 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 <algorithm>
   6
   7 #include "ppapi/cpp/graphics_2d.h"
   8 #include "ppapi/cpp/image_data.h"
   9 #include "ppapi/cpp/instance.h"
  10 #include "ppapi/cpp/module.h"
  11 #include "ppapi/tests/test_utils.h"
  12
  13 // Windows defines 'PostMessage', so we have to undef it.
  14 #ifdef PostMessage
  15 #undef PostMessage
  16 #endif
  17
  18 static void DummyCompletionCallback(void*, int32_t) {
  19 }
  20
  21 // This is a simple C++ Pepper plugin that enables Plugin Power Saver tests.
  22 class PowerSaverTestInstance : public pp::Instance {
  23  public:
  24   explicit PowerSaverTestInstance(PP_Instance instance)
  25       : pp::Instance(instance) {}
  26   ~PowerSaverTestInstance() override {}
  27
  28   bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
  29     GetTestingInterface()->SubscribeToPowerSaverNotifications(pp_instance());
  30     return true;
  31   }
  32
  33   void HandleMessage(const pp::Var& message_data) override {
  34     if (message_data.is_string() &&
  35         message_data.AsString() == "getPowerSaverStatus") {
  36       GetTestingInterface()->PostPowerSaverStatus(pp_instance());
  37     }
  38   }
  39
  40   // Broadcast our peripheral status after the initial view data. This is for
  41   // tests that await initial plugin creation.
  42   void DidChangeView(const pp::View& view) override {
  43     view_ = view;
  44     device_context_ = pp::Graphics2D(this, view_.GetRect().size(), true);
  45     if (!BindGraphics(device_context_))
  46       return;
  47
  48     // Since we draw a static image, we only need to make a new frame when
  49     // the device is initialized or the view size changes.
  50     Paint();
  51   }
  52
  53  private:
  54   void Paint() {
  55     pp::ImageData image(this, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
  56                         view_.GetRect().size(), true);
  57     if (image.is_null())
  58       return;
  59
  60     // Draw black and white stripes to present an "interesting" keyframe.
  61     for (int y = 0; y < view_.GetRect().size().height(); ++y) {
  62       for (int x = 0; x < view_.GetRect().size().width(); ++x) {
  63         uint32_t color = x % 2 ? 0xFF0000FF : 0xFFFFFFFF;
  64         *image.GetAddr32(pp::Point(x, y)) = color;
  65       }
  66     }
  67
  68     device_context_.ReplaceContents(&image);
  69     device_context_.Flush(
  70         pp::CompletionCallback(&DummyCompletionCallback, nullptr));
  71   }
  72
  73   pp::View view_;
  74   pp::Graphics2D device_context_;
  75 };
  76
  77 class PowerSaverTestModule : public pp::Module {
  78  public:
  79   PowerSaverTestModule() : pp::Module() {}
  80   virtual ~PowerSaverTestModule() {}
  81
  82   virtual pp::Instance* CreateInstance(PP_Instance instance) {
  83     return new PowerSaverTestInstance(instance);
  84   }
  85 };
  86
  87 namespace pp {
  88
  89 Module* CreateModule() {
  90   return new PowerSaverTestModule();
  91 }
  92
  93 }  // namespace pp