cef/include/capi/views/cef_display_capi.h

// Copyright (c) 2021 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_VIEWS_CEF_DISPLAY_CAPI_H_
#define CEF_INCLUDE_CAPI_VIEWS_CEF_DISPLAY_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
// This structure typically, but not always, corresponds to a physical display
// connected to the system. A fake Display may exist on a headless system, or a
// Display may correspond to a remote, virtual display. All size and position
// values are in density independent pixel (DIP) coordinates unless otherwise
// indicated. Methods must be called on the browser process UI thread unless
// otherwise indicated.
///
typedef struct _cef_display_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Returns the unique identifier for this Display.
  ///
  int64(CEF_CALLBACK* get_id)(struct _cef_display_t* self);

  ///
  // Returns this Display's device pixel scale factor. This specifies how much
  // the UI should be scaled when the actual output has more pixels than
  // standard displays (which is around 100~120dpi). The potential return values
  // differ by platform.
  ///
  float(CEF_CALLBACK* get_device_scale_factor)(struct _cef_display_t* self);

  ///
  // Convert |point| from DIP coordinates to pixel coordinates using this
  // Display's device scale factor.
  ///
  void(CEF_CALLBACK* convert_point_to_pixels)(struct _cef_display_t* self,
                                              cef_point_t* point);

  ///
  // Convert |point| from pixel coordinates to DIP coordinates using this
  // Display's device scale factor.
  ///
  void(CEF_CALLBACK* convert_point_from_pixels)(struct _cef_display_t* self,
                                                cef_point_t* point);

  ///
  // Returns this Display's bounds in DIP screen coordinates. This is the full
  // size of the display.
  ///
  cef_rect_t(CEF_CALLBACK* get_bounds)(struct _cef_display_t* self);

  ///
  // Returns this Display's work area in DIP screen coordinates. This excludes
  // areas of the display that are occupied with window manager toolbars, etc.
  ///
  cef_rect_t(CEF_CALLBACK* get_work_area)(struct _cef_display_t* self);

  ///
  // Returns this Display's rotation in degrees.
  ///
  int(CEF_CALLBACK* get_rotation)(struct _cef_display_t* self);
} cef_display_t;

///
// Returns the primary Display.
///
CEF_EXPORT cef_display_t* cef_display_get_primary();

///
// Returns the Display nearest |point|. Set |input_pixel_coords| to true (1) if
// |point| is in pixel screen coordinates instead of DIP screen coordinates.
///
CEF_EXPORT cef_display_t* cef_display_get_nearest_point(
    const cef_point_t* point,
    int input_pixel_coords);

///
// Returns the Display that most closely intersects |bounds|.  Set
// |input_pixel_coords| to true (1) if |bounds| is in pixel screen coordinates
// instead of DIP screen coordinates.
///
CEF_EXPORT cef_display_t* cef_display_get_matching_bounds(
    const cef_rect_t* bounds,
    int input_pixel_coords);

///
// Returns the total number of Displays. Mirrored displays are excluded; this
// function is intended to return the number of distinct, usable displays.
///
CEF_EXPORT size_t cef_display_get_count();

///
// Returns all Displays. Mirrored displays are excluded; this function is
// intended to return distinct, usable displays.
///
CEF_EXPORT void cef_display_get_alls(size_t* displaysCount,
                                     cef_display_t** displays);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_VIEWS_CEF_DISPLAY_CAPI_H_