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-rw-r--r--webkit/glue/plugins/pepper_image_data.h131
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diff --git a/webkit/glue/plugins/pepper_image_data.h b/webkit/glue/plugins/pepper_image_data.h
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--- a/webkit/glue/plugins/pepper_image_data.h
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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 WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_
-#define WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_
-
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "ppapi/c/ppb_image_data.h"
-#include "webkit/glue/plugins/pepper_plugin_delegate.h"
-#include "webkit/glue/plugins/pepper_resource.h"
-
-namespace skia {
-class PlatformCanvas;
-}
-
-struct PPB_ImageDataTrusted;
-class SkBitmap;
-
-namespace pepper {
-
-class ImageData : public Resource {
- public:
- explicit ImageData(PluginModule* module);
- virtual ~ImageData();
-
- int width() const { return width_; }
- int height() const { return height_; }
-
- // Returns the image format.
- PP_ImageDataFormat format() const { return format_; }
-
- // Returns true if this image is mapped. False means that the image is either
- // invalid or not mapped. See ImageDataAutoMapper below.
- bool is_mapped() const { return !!mapped_canvas_.get(); }
-
- PluginDelegate::PlatformImage2D* platform_image() const {
- return platform_image_.get();
- }
-
- // Returns a pointer to the interface implementing PPB_ImageData that is
- // exposed to the plugin.
- static const PPB_ImageData* GetInterface();
- static const PPB_ImageDataTrusted* GetTrustedInterface();
-
- // Returns the image data format used by the browser. If the plugin uses the
- // same format, there is no conversion. Otherwise the browser will be in
- // charge of converting from a supported format to its native format.
- static PP_ImageDataFormat GetNativeImageDataFormat();
-
- // Returns true if the format is supported by the browser.
- static bool IsImageDataFormatSupported(PP_ImageDataFormat format);
-
- // Resource overrides.
- virtual ImageData* AsImageData() { return this; }
-
- // PPB_ImageData implementation.
- bool Init(PP_ImageDataFormat format,
- int width, int height,
- bool init_to_zero);
- void Describe(PP_ImageDataDesc* desc) const;
- void* Map();
- void Unmap();
-
- // PPB_ImageDataTrusted implementation.
- uint64 GetNativeMemoryHandle(uint32* byte_count) const;
-
- // The mapped bitmap and canvas will be NULL if the image is not mapped.
- skia::PlatformCanvas* mapped_canvas() const { return mapped_canvas_.get(); }
- const SkBitmap* GetMappedBitmap() const;
-
- // Swaps the guts of this image data with another.
- void Swap(ImageData* other);
-
- private:
- // This will be NULL before initialization, and if this ImageData is
- // swapped with another.
- scoped_ptr<PluginDelegate::PlatformImage2D> platform_image_;
-
- // When the device is mapped, this is the image. Null when umapped.
- scoped_ptr<skia::PlatformCanvas> mapped_canvas_;
-
- PP_ImageDataFormat format_;
- int width_;
- int height_;
-
- DISALLOW_COPY_AND_ASSIGN(ImageData);
-};
-
-// Manages mapping an image resource if necessary. Use this to ensure the
-// image is mapped. The destructor will put the image back into the previous
-// state. You must check is_valid() to make sure the image was successfully
-// mapped before using it.
-//
-// Example:
-// ImageDataAutoMapper mapper(image_data);
-// if (!mapper.is_valid())
-// return utter_failure;
-// image_data->mapped_canvas()->blah(); // Guaranteed valid.
-class ImageDataAutoMapper {
- public:
- ImageDataAutoMapper(ImageData* image_data) : image_data_(image_data) {
- if (image_data_->is_mapped()) {
- is_valid_ = true;
- needs_unmap_ = false;
- } else {
- is_valid_ = needs_unmap_ = !!image_data_->Map();
- }
- }
-
- ~ImageDataAutoMapper() {
- if (needs_unmap_)
- image_data_->Unmap();
- }
-
- // Check this to see if the image was successfully mapped. If this is false,
- // the image could not be mapped and is unusable.
- bool is_valid() const { return is_valid_; }
-
- private:
- ImageData* image_data_;
- bool is_valid_;
- bool needs_unmap_;
-
- DISALLOW_COPY_AND_ASSIGN(ImageDataAutoMapper);
-};
-
-} // namespace pepper
-
-#endif // WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_