192 lines
7.8 KiB
C++
192 lines
7.8 KiB
C++
// Copyright (c) 2016 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ---------------------------------------------------------------------------
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//
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// The contents of this file must follow a specific format in order to
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// support the CEF translator tool. See the translator.README.txt file in the
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// tools directory for more information.
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//
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#ifndef CEF_INCLUDE_CEF_IMAGE_H_
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#define CEF_INCLUDE_CEF_IMAGE_H_
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#pragma once
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#include "include/cef_base.h"
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#include "include/cef_values.h"
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///
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// Container for a single image represented at different scale factors. All
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// image representations should be the same size in density independent pixel
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// (DIP) units. For example, if the image at scale factor 1.0 is 100x100 pixels
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// then the image at scale factor 2.0 should be 200x200 pixels -- both images
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// will display with a DIP size of 100x100 units. The methods of this class must
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// be called on the browser process UI thread.
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///
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/*--cef(source=library)--*/
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class CefImage : public virtual CefBaseRefCounted {
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public:
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///
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// Create a new CefImage. It will initially be empty. Use the Add*() methods
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// to add representations at different scale factors.
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///
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/*--cef()--*/
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static CefRefPtr<CefImage> CreateImage();
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///
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// Returns true if this Image is empty.
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///
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/*--cef()--*/
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virtual bool IsEmpty() = 0;
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///
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// Returns true if this Image and |that| Image share the same underlying
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// storage. Will also return true if both images are empty.
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///
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/*--cef()--*/
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virtual bool IsSame(CefRefPtr<CefImage> that) = 0;
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///
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// Add a bitmap image representation for |scale_factor|. Only 32-bit RGBA/BGRA
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// formats are supported. |pixel_width| and |pixel_height| are the bitmap
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// representation size in pixel coordinates. |pixel_data| is the array of
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// pixel data and should be |pixel_width| x |pixel_height| x 4 bytes in size.
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// |color_type| and |alpha_type| values specify the pixel format.
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///
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/*--cef()--*/
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virtual bool AddBitmap(float scale_factor,
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int pixel_width,
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int pixel_height,
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cef_color_type_t color_type,
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cef_alpha_type_t alpha_type,
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const void* pixel_data,
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size_t pixel_data_size) = 0;
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///
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// Add a PNG image representation for |scale_factor|. |png_data| is the image
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// data of size |png_data_size|. Any alpha transparency in the PNG data will
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// be maintained.
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///
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/*--cef()--*/
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virtual bool AddPNG(float scale_factor,
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const void* png_data,
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size_t png_data_size) = 0;
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///
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// Create a JPEG image representation for |scale_factor|. |jpeg_data| is the
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// image data of size |jpeg_data_size|. The JPEG format does not support
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// transparency so the alpha byte will be set to 0xFF for all pixels.
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///
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/*--cef()--*/
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virtual bool AddJPEG(float scale_factor,
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const void* jpeg_data,
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size_t jpeg_data_size) = 0;
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///
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// Returns the image width in density independent pixel (DIP) units.
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///
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/*--cef()--*/
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virtual size_t GetWidth() = 0;
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///
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// Returns the image height in density independent pixel (DIP) units.
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///
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/*--cef()--*/
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virtual size_t GetHeight() = 0;
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///
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// Returns true if this image contains a representation for |scale_factor|.
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///
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/*--cef()--*/
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virtual bool HasRepresentation(float scale_factor) = 0;
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///
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// Removes the representation for |scale_factor|. Returns true on success.
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///
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/*--cef()--*/
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virtual bool RemoveRepresentation(float scale_factor) = 0;
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///
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// Returns information for the representation that most closely matches
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// |scale_factor|. |actual_scale_factor| is the actual scale factor for the
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// representation. |pixel_width| and |pixel_height| are the representation
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// size in pixel coordinates. Returns true on success.
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///
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/*--cef()--*/
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virtual bool GetRepresentationInfo(float scale_factor,
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float& actual_scale_factor,
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int& pixel_width,
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int& pixel_height) = 0;
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///
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// Returns the bitmap representation that most closely matches |scale_factor|.
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// Only 32-bit RGBA/BGRA formats are supported. |color_type| and |alpha_type|
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// values specify the desired output pixel format. |pixel_width| and
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// |pixel_height| are the output representation size in pixel coordinates.
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// Returns a CefBinaryValue containing the pixel data on success or NULL on
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// failure.
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///
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/*--cef()--*/
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virtual CefRefPtr<CefBinaryValue> GetAsBitmap(float scale_factor,
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cef_color_type_t color_type,
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cef_alpha_type_t alpha_type,
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int& pixel_width,
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int& pixel_height) = 0;
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///
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// Returns the PNG representation that most closely matches |scale_factor|. If
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// |with_transparency| is true any alpha transparency in the image will be
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// represented in the resulting PNG data. |pixel_width| and |pixel_height| are
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// the output representation size in pixel coordinates. Returns a
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// CefBinaryValue containing the PNG image data on success or NULL on failure.
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///
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/*--cef()--*/
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virtual CefRefPtr<CefBinaryValue> GetAsPNG(float scale_factor,
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bool with_transparency,
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int& pixel_width,
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int& pixel_height) = 0;
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///
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// Returns the JPEG representation that most closely matches |scale_factor|.
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// |quality| determines the compression level with 0 == lowest and 100 ==
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// highest. The JPEG format does not support alpha transparency and the alpha
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// channel, if any, will be discarded. |pixel_width| and |pixel_height| are
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// the output representation size in pixel coordinates. Returns a
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// CefBinaryValue containing the JPEG image data on success or NULL on
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// failure.
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///
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/*--cef()--*/
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virtual CefRefPtr<CefBinaryValue> GetAsJPEG(float scale_factor,
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int quality,
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int& pixel_width,
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int& pixel_height) = 0;
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};
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#endif // CEF_INCLUDE_CEF_IMAGE_H_
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