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// 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.
#ifndef PPAPI_CPP_IMAGE_DATA_H_
#define PPAPI_CPP_IMAGE_DATA_H_
#include "ppapi/c/ppb_image_data.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/size.h"
#include "ppapi/cpp/resource.h"
namespace pp {
class Plugin;
class ImageData : public Resource {
public:
// Creates an is_null() ImageData object.
ImageData();
// This magic constructor is used when we've gotten a PP_Resource as a return
// value that has already been addref'ed for us.
struct PassRef {};
ImageData(PassRef, PP_Resource resource);
ImageData(const ImageData& other);
// Allocates a new ImageData in the browser with the given parameters. The
// resulting object will be is_null() if the allocation failed.
ImageData(PP_ImageDataFormat format,
const Size& size,
bool init_to_zero);
virtual ~ImageData();
ImageData& operator=(const ImageData& other);
void swap(ImageData& other);
// Returns the browser's preferred format for images. Using this format
// guarantees no extra conversions will occur when painting.
static PP_ImageDataFormat GetNativeImageDataFormat();
PP_ImageDataFormat format() const { return desc_.format; }
pp::Size size() const { return desc_.size; }
int32_t stride() const { return desc_.stride; }
void* data() const { return data_; }
// Helper function to retrieve the address of the given pixel for 32-bit
// pixel formats.
const uint32_t* GetAddr32(const Point& coord) const;
uint32_t* GetAddr32(const Point& coord);
private:
void PassRefAndInitData(PP_Resource resource);
PP_ImageDataDesc desc_;
void* data_;
};
} // namespace pp
#endif // PPAPI_CPP_IMAGE_DATA_H_
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