cef/include/capi/cef_image_capi.h

// Copyright (c) 2017 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
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//    * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//    * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
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//
// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
//

#ifndef CEF_INCLUDE_CAPI_CEF_IMAGE_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_IMAGE_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_values_capi.h"

#ifdef __cplusplus
extern "C" {
#endif


///
// Container for a single image represented at different scale factors. All
// image representations should be the same size in density independent pixel
// (DIP) units. For example, if the image at scale factor 1.0 is 100x100 pixels
// then the image at scale factor 2.0 should be 200x200 pixels -- both images
// will display with a DIP size of 100x100 units. The functions of this
// structure must be called on the browser process UI thread.
///
typedef struct _cef_image_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Returns true (1) if this Image is NULL.
  ///
  int (CEF_CALLBACK *is_empty)(struct _cef_image_t* self);

  ///
  // Returns true (1) if this Image and |that| Image share the same underlying
  // storage. Will also return true (1) if both images are NULL.
  ///
  int (CEF_CALLBACK *is_same)(struct _cef_image_t* self,
      struct _cef_image_t* that);

  ///
  // Add a bitmap image representation for |scale_factor|. Only 32-bit RGBA/BGRA
  // formats are supported. |pixel_width| and |pixel_height| are the bitmap
  // representation size in pixel coordinates. |pixel_data| is the array of
  // pixel data and should be |pixel_width| x |pixel_height| x 4 bytes in size.
  // |color_type| and |alpha_type| values specify the pixel format.
  ///
  int (CEF_CALLBACK *add_bitmap)(struct _cef_image_t* self, float scale_factor,
      int pixel_width, int pixel_height, cef_color_type_t color_type,
      cef_alpha_type_t alpha_type, const void* pixel_data,
      size_t pixel_data_size);

  ///
  // Add a PNG image representation for |scale_factor|. |png_data| is the image
  // data of size |png_data_size|. Any alpha transparency in the PNG data will
  // be maintained.
  ///
  int (CEF_CALLBACK *add_png)(struct _cef_image_t* self, float scale_factor,
      const void* png_data, size_t png_data_size);

  ///
  // Create a JPEG image representation for |scale_factor|. |jpeg_data| is the
  // image data of size |jpeg_data_size|. The JPEG format does not support
  // transparency so the alpha byte will be set to 0xFF for all pixels.
  ///
  int (CEF_CALLBACK *add_jpeg)(struct _cef_image_t* self, float scale_factor,
      const void* jpeg_data, size_t jpeg_data_size);

  ///
  // Returns the image width in density independent pixel (DIP) units.
  ///
  size_t (CEF_CALLBACK *get_width)(struct _cef_image_t* self);

  ///
  // Returns the image height in density independent pixel (DIP) units.
  ///
  size_t (CEF_CALLBACK *get_height)(struct _cef_image_t* self);

  ///
  // Returns true (1) if this image contains a representation for
  // |scale_factor|.
  ///
  int (CEF_CALLBACK *has_representation)(struct _cef_image_t* self,
      float scale_factor);

  ///
  // Removes the representation for |scale_factor|. Returns true (1) on success.
  ///
  int (CEF_CALLBACK *remove_representation)(struct _cef_image_t* self,
      float scale_factor);

  ///
  // Returns information for the representation that most closely matches
  // |scale_factor|. |actual_scale_factor| is the actual scale factor for the
  // representation. |pixel_width| and |pixel_height| are the representation
  // size in pixel coordinates. Returns true (1) on success.
  ///
  int (CEF_CALLBACK *get_representation_info)(struct _cef_image_t* self,
      float scale_factor, float* actual_scale_factor, int* pixel_width,
      int* pixel_height);

  ///
  // Returns the bitmap representation that most closely matches |scale_factor|.
  // Only 32-bit RGBA/BGRA formats are supported. |color_type| and |alpha_type|
  // values specify the desired output pixel format. |pixel_width| and
  // |pixel_height| are the output representation size in pixel coordinates.
  // Returns a cef_binary_value_t containing the pixel data on success or NULL
  // on failure.
  ///
  struct _cef_binary_value_t* (CEF_CALLBACK *get_as_bitmap)(
      struct _cef_image_t* self, float scale_factor,
      cef_color_type_t color_type, cef_alpha_type_t alpha_type,
      int* pixel_width, int* pixel_height);

  ///
  // Returns the PNG representation that most closely matches |scale_factor|. If
  // |with_transparency| is true (1) any alpha transparency in the image will be
  // represented in the resulting PNG data. |pixel_width| and |pixel_height| are
  // the output representation size in pixel coordinates. Returns a
  // cef_binary_value_t containing the PNG image data on success or NULL on
  // failure.
  ///
  struct _cef_binary_value_t* (CEF_CALLBACK *get_as_png)(
      struct _cef_image_t* self, float scale_factor, int with_transparency,
      int* pixel_width, int* pixel_height);

  ///
  // Returns the JPEG representation that most closely matches |scale_factor|.
  // |quality| determines the compression level with 0 == lowest and 100 ==
  // highest. The JPEG format does not support alpha transparency and the alpha
  // channel, if any, will be discarded. |pixel_width| and |pixel_height| are
  // the output representation size in pixel coordinates. Returns a
  // cef_binary_value_t containing the JPEG image data on success or NULL on
  // failure.
  ///
  struct _cef_binary_value_t* (CEF_CALLBACK *get_as_jpeg)(
      struct _cef_image_t* self, float scale_factor, int quality,
      int* pixel_width, int* pixel_height);
} cef_image_t;


///
// Create a new cef_image_t. It will initially be NULL. Use the Add*() functions
// to add representations at different scale factors.
///
CEF_EXPORT cef_image_t* cef_image_create();


#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_IMAGE_CAPI_H_