Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/tests/ppapi_simple_tests/graphics2d.cc

+// Copyright (c) 2011 The Native Client 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 <stdint.h>
+
+#include <cmath>
+#include <limits>
+#include <string>
+
+#include <nacl/nacl_check.h>
+#include <nacl/nacl_log.h>
+
+#include "ppapi/c/pp_rect.h"
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/rect.h"
+#include "ppapi/cpp/graphics_2d.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+
+const uint32_t kDefaultColor = 0x2266aa;
+
+void FillRect(pp::ImageData* image, int left, int top, int width, int height,
+              uint32_t color) {
+  for (int y = std::max(0, top);
+       y < std::min(image->size().height() - 1, top + height);
+       y++) {
+    for (int x = std::max(0, left);
+         x < std::min(image->size().width() - 1, left + width);
+         x++)
+      *image->GetAddr32(pp::Point(x, y)) = color;
+  }
+}
+
+class MyInstance : public pp::Instance {
+ private:
+  uint32_t color_;
+  pp::Size size_;
+  pp::Graphics2D device_context_;
+
+  void ParseArgs(uint32_t argc, const char* argn[], const char* argv[]) {
+    for (uint32_t i = 0; i < argc; ++i) {
+      const std::string tag = argn[i];
+      if (tag == "color") color_ = strtol(argv[i], 0, 0);
+    }
+  }
+
+  static void FlushCallback(void* thiz, int32_t result) {
+    // If necessary we can get at the instabce like so:
+    // MyInstance* instance = static_cast<MyInstance*>(thiz);
+  }
+
+ public:
+  explicit MyInstance(PP_Instance instance)
+    : pp::Instance(instance), color_(kDefaultColor), size_(0, 0) {}
+
+  virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
+    ParseArgs(argc, argn, argv);
+    return true;
+  }
+
+  virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip) {
+    if (position.size().width() == size_.width() &&
+        position.size().height() == size_.height()) {
+      // No change. We don't care about the position, only the size.
+      return;
+    }
+
+    device_context_ = pp::Graphics2D(this, position.size(), false);
+    CHECK(BindGraphics(device_context_));
+    size_ = position.size();
+
+    pp::ImageData image(this, PP_IMAGEDATAFORMAT_BGRA_PREMUL, size_, true);
+    CHECK(!image.is_null());
+    FillRect(&image, 0, 0, size_.width(), size_.height(), color_);
+
+    device_context_.ReplaceContents(&image);
+    pp::CompletionCallback cc(FlushCallback, this);
+
+    device_context_.Flush(cc);
+  }
+};
+
+
+class MyModule : public pp::Module {
+ public:
+  // Override CreateInstance to create your customized Instance object.
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    return new MyInstance(instance);
+  }
+};
+
+namespace pp {
+
+// Factory function for your specialization of the Module object.
+Module* CreateModule() {
+  return new MyModule();
+}
+
+}  // namespace pp