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-- Common image types used by the vc_image library.
local ffi = require "ffi"

ffi.cdef[[
//enums of display input format
typedef enum
{
VCOS_DISPLAY_INPUT_FORMAT_INVALID = 0,
VCOS_DISPLAY_INPUT_FORMAT_RGB888,
VCOS_DISPLAY_INPUT_FORMAT_RGB565
} VCOS_DISPLAY_INPUT_FORMAT_T;


typedef VCOS_DISPLAY_INPUT_FORMAT_T DISPLAY_INPUT_FORMAT_T;

// Enum determining how image data for 3D displays has to be supplied
typedef enum
{
DISPLAY_3D_UNSUPPORTED = 0, // default
DISPLAY_3D_INTERLEAVED, // For autosteroscopic displays
DISPLAY_3D_SBS_FULL_AUTO, // Side-By-Side, Full Width (also used by some autostereoscopic displays)
DISPLAY_3D_SBS_HALF_HORIZ, // Side-By-Side, Half Width, Horizontal Subsampling (see HDMI spec)
DISPLAY_3D_FORMAT_MAX
} DISPLAY_3D_FORMAT_T;

//enums of display types
typedef enum
{
DISPLAY_INTERFACE_MIN,
DISPLAY_INTERFACE_SMI,
DISPLAY_INTERFACE_DPI,
DISPLAY_INTERFACE_DSI,
DISPLAY_INTERFACE_LVDS,
DISPLAY_INTERFACE_MAX

} DISPLAY_INTERFACE_T;

/* display dither setting, used on B0 */
typedef enum {
DISPLAY_DITHER_NONE = 0, /* default if not set */
DISPLAY_DITHER_RGB666 = 1,
DISPLAY_DITHER_RGB565 = 2,
DISPLAY_DITHER_RGB555 = 3,
DISPLAY_DITHER_MAX
} DISPLAY_DITHER_T;

//info struct
typedef struct
{
//type
DISPLAY_INTERFACE_T type;
//width / height
uint32_t width;
uint32_t height;
//output format
DISPLAY_INPUT_FORMAT_T input_format;
//interlaced?
uint32_t interlaced;
/* output dither setting (if required) */
DISPLAY_DITHER_T output_dither;
/* Pixel frequency */
uint32_t pixel_freq;
/* Line rate in lines per second */
uint32_t line_rate;
// Format required for image data for 3D displays
DISPLAY_3D_FORMAT_T format_3d;
} DISPLAY_INFO_T;

]]
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