FFmpeg: libavfilter/drawutils.h File Reference

void ff_copy_rectangle2 (FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h)

Copy a rectangle from an image to another. More...

void ff_fill_rectangle (FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)

Fill a rectangle with an uniform color. More...

void ff_blend_rectangle (FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, int x0, int y0, int w, int h)

Blend a rectangle with an uniform color. More...

void ff_blend_mask (FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, const uint8_t *mask, int mask_linesize, int mask_w, int mask_h, int l2depth, unsigned endianness, int x0, int y0)

Blend an alpha mask with an uniform color. More...

int ff_draw_round_to_sub (FFDrawContext *draw, int sub_dir, int round_dir, int value)

Round a dimension according to subsampling. More...

AVFilterFormats * ff_draw_supported_pixel_formats (unsigned flags)

Return the list of pixel formats supported by the draw functions. More...

Detailed Description

misc drawing utilities

Definition in file drawutils.h.

Macro Definition Documentation

◆ MAX_PLANES

#define MAX_PLANES 4

Definition at line 33 of file drawutils.h.

◆ FF_DRAW_PROCESS_ALPHA

#define FF_DRAW_PROCESS_ALPHA 1

Process alpha pixel component.

Definition at line 60 of file drawutils.h.

Function Documentation

◆ ff_fill_rgba_map()

int ff_fill_rgba_map ( uint8_t * rgba_map,

enum AVPixelFormat pix_fmt

)

Definition at line 34 of file drawutils.c.

Referenced by config_input(), config_input_main(), config_input_overlay(), config_input_ref(), config_output(), config_props(), oscilloscope_config_input(), pad_opencl_init(), and pixscope_config_input().

◆ ff_draw_init()

int ff_draw_init ( FFDrawContext * draw,

enum AVPixelFormat format,

unsigned flags

)

Init a draw context.

Only a limited number of pixel formats are supported, if format is not supported the function will return an error. flags is combination of FF_DRAW_* flags.

Returns: 0 for success, < 0 for error

Definition at line 79 of file drawutils.c.

Referenced by config_input(), config_out_props(), config_output(), config_props(), ff_draw_supported_pixel_formats(), main(), oscilloscope_config_input(), and pixscope_config_input().

◆ ff_draw_color()

void ff_draw_color ( FFDrawContext * draw,

FFDrawColor * color,

const uint8_t rgba[4]

)

Prepare a color.

Definition at line 141 of file drawutils.c.

Referenced by config_input(), config_out_props(), config_output(), config_props(), draw_text(), main(), oscilloscope_config_input(), overlay_ass_image(), pixscope_config_input(), process_command(), update_color_with_alpha(), and update_oscilloscope().

◆ ff_copy_rectangle2()

void ff_copy_rectangle2 ( FFDrawContext * draw,

uint8_t * dst[],

int dst_linesize[],

uint8_t * src[],

int src_linesize[],

int dst_x,

int dst_y,

int src_x,

int src_y,

int w,

int h

)

Copy a rectangle from an image to another.

The coordinates must be as even as the subsampling requires.

Definition at line 192 of file drawutils.c.

Referenced by filter_frame().

◆ ff_fill_rectangle()

void ff_fill_rectangle ( FFDrawContext * draw,

FFDrawColor * color,

uint8_t * dst[],

int dst_linesize[],

int dst_x,

int dst_y,

int w,

int h

)

Fill a rectangle with an uniform color.

The coordinates must be as even as the subsampling requires. The color needs to be inited with ff_draw_color.

Definition at line 214 of file drawutils.c.

Referenced by activate(), config_out_props(), draw_blank_frame(), filter_color2(), filter_frame(), oscilloscope_filter_frame(), pixscope_filter_frame(), and process_frame().

◆ ff_blend_rectangle()

void ff_blend_rectangle ( FFDrawContext * draw,

FFDrawColor * color,

uint8_t * dst[],

int dst_linesize[],

int dst_w,

int dst_h,

int x0,

int y0,

int w,

int h

)

Blend a rectangle with an uniform color.

Definition at line 336 of file drawutils.c.

Referenced by draw_text(), oscilloscope_filter_frame(), and pixscope_filter_frame().

◆ ff_blend_mask()

void ff_blend_mask ( FFDrawContext * draw,

FFDrawColor * color,

uint8_t * dst[],

int dst_linesize[],

int dst_w,

int dst_h,

const uint8_t * mask,

int mask_linesize,

int mask_w,

int mask_h,

int l2depth,

unsigned endianness,

int x0,

int y0

)

Blend an alpha mask with an uniform color.

Parameters: draw draw context

color color for the overlay;

dst destination image

dst_linesize line stride of the destination

dst_w width of the destination image

dst_h height of the destination image

mask mask

mask_linesize line stride of the mask

mask_w width of the mask

mask_h height of the mask

l2depth log2 of depth of the mask (0 for 1bpp, 3 for 8bpp)

endianness bit order of the mask (0: MSB to the left)

x0 horizontal position of the overlay

y0 vertical position of the overlay

Definition at line 517 of file drawutils.c.

Referenced by draw_glyphs(), draw_text(), and overlay_ass_image().

◆ ff_draw_round_to_sub()

int ff_draw_round_to_sub ( FFDrawContext * draw,

int sub_dir,

int round_dir,

int value

)

Round a dimension according to subsampling.

Parameters: draw draw context

sub_dir 0 for horizontal, 1 for vertical

round_dir 0 nearest, -1 round down, +1 round up

value value to round

Returns: the rounded value

Definition at line 618 of file drawutils.c.

Referenced by config_input().

◆ ff_draw_supported_pixel_formats()

AVFilterFormats* ff_draw_supported_pixel_formats ( unsigned flags )

Return the list of pixel formats supported by the draw functions.

The flags are the same as ff_draw_init, i.e., none currently.

Definition at line 630 of file drawutils.c.

Referenced by query_formats().

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