// Copyright (c) 2010 The Chromium 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 "ppapi/cpp/graphics_2d.h"

#include "ppapi/c/pp_errors.h"
#include "ppapi/c/ppb_graphics_2d.h"
#include "ppapi/cpp/common.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/module_impl.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/rect.h"

namespace {

DeviceFuncs<PPB_Graphics2D> graphics_2d_f(PPB_GRAPHICS_2D_INTERFACE);

}  // namespace

namespace pp {

Graphics2D::Graphics2D() : Resource() {
}

Graphics2D::Graphics2D(const Graphics2D& other)
    : Resource(other),
      size_(other.size_) {
}

Graphics2D::Graphics2D(const Size& size, bool is_always_opaque)
    : Resource() {
  if (!graphics_2d_f)
    return;
  PassRefFromConstructor(graphics_2d_f->Create(Module::Get()->pp_module(),
                                               &size.pp_size(),
                                               BoolToPPBool(is_always_opaque)));
  if (!is_null()) {
    // Only save the size if allocation succeeded.
    size_ = size;
  }
}

Graphics2D::~Graphics2D() {
}

Graphics2D& Graphics2D::operator=(const Graphics2D& other) {
  Graphics2D copy(other);
  swap(copy);
  return *this;
}

void Graphics2D::swap(Graphics2D& other) {
  Resource::swap(other);
  size_.swap(other.size_);
}

void Graphics2D::PaintImageData(const ImageData& image,
                                const Point& top_left) {
  if (!graphics_2d_f)
    return;
  graphics_2d_f->PaintImageData(pp_resource(), image.pp_resource(),
                                &top_left.pp_point(), NULL);
}

void Graphics2D::PaintImageData(const ImageData& image,
                                const Point& top_left,
                                const Rect& src_rect) {
  if (!graphics_2d_f)
    return;
  graphics_2d_f->PaintImageData(pp_resource(), image.pp_resource(),
                                &top_left.pp_point(), &src_rect.pp_rect());
}

void Graphics2D::Scroll(const Rect& clip, const Point& amount) {
  if (!graphics_2d_f)
    return;
  graphics_2d_f->Scroll(pp_resource(), &clip.pp_rect(), &amount.pp_point());
}

void Graphics2D::ReplaceContents(ImageData* image) {
  if (!graphics_2d_f)
    return;
  graphics_2d_f->ReplaceContents(pp_resource(), image->pp_resource());

  // On success, reset the image data. This is to help prevent people
  // from continuing to use the resource which will result in artifacts.
  *image = ImageData();
}

int32_t Graphics2D::Flush(const CompletionCallback& cc) {
  if (!graphics_2d_f)
    return PP_ERROR_NOINTERFACE;
  return graphics_2d_f->Flush(pp_resource(), cc.pp_completion_callback());
}

}  // namespace pp