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drawutils.c File Reference
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/colorspace.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "drawutils.h"
#include "formats.h"

Go to the source code of this file.

Macros

#define EXPAND(compn)
 

Enumerations

enum  { RED = 0, GREEN, BLUE, ALPHA }
 

Functions

int ff_fill_rgba_map (uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
 
int ff_fill_line_with_color (uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba, uint8_t rgba_map_ptr[4])
 
void ff_draw_rectangle (uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int pixelstep[4], int hsub, int vsub, int x, int y, int w, int h)
 
void ff_copy_rectangle (uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int src_linesize[4], int pixelstep[4], int hsub, int vsub, int x, int y, int y2, int w, int h)
 
int ff_draw_init (FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
 Init a draw context. More...
 
void ff_draw_color (FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
 Prepare a color. More...
 
static uint8_tpointer_at (FFDrawContext *draw, uint8_t *data[], int linesize[], int plane, int x, int y)
 
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...
 
static void clip_interval (int wmax, int *x, int *w, int *dx)
 Clip interval [x; x+w[ within [0; wmax[. More...
 
static void subsampling_bounds (int sub, int *x, int *w, int *start, int *end)
 Decompose w pixels starting at x into start + (w starting at x) + end with x and w aligned on multiples of 1<<sub. More...
 
static int component_used (FFDrawContext *draw, int plane, int comp)
 
static void blend_line (uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right)
 
static void blend_line16 (uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right)
 
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...
 
static void blend_pixel16 (uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0)
 
static void blend_pixel (uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0)
 
static void blend_line_hv16 (uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband)
 
static void blend_line_hv (uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband)
 
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...
 
AVFilterFormatsff_draw_supported_pixel_formats (unsigned flags)
 Return the list of pixel formats supported by the draw functions. More...
 

Macro Definition Documentation

#define EXPAND (   compn)
Value:
if (desc->comp[compn].depth > 8) \
color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \
color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << (draw->desc->comp[compn].depth - 8)
const char * desc
Definition: nvenc.c:89
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94

Referenced by ff_draw_color().

Enumeration Type Documentation

anonymous enum
Enumerator
RED 
GREEN 
BLUE 
ALPHA 

Definition at line 33 of file drawutils.c.

Function Documentation

int ff_fill_rgba_map ( uint8_t rgba_map,
enum AVPixelFormat  pix_fmt 
)
int ff_fill_line_with_color ( uint8_t line[4],
int  pixel_step[4],
int  w,
uint8_t  dst_color[4],
enum AVPixelFormat  pix_fmt,
uint8_t  rgba_color[4],
int *  is_packed_rgba,
uint8_t  rgba_map_ptr[4] 
)

Definition at line 78 of file drawutils.c.

void ff_draw_rectangle ( uint8_t dst[4],
int  dst_linesize[4],
uint8_t src[4],
int  pixelstep[4],
int  hsub,
int  vsub,
int  x,
int  y,
int  w,
int  h 
)

Definition at line 132 of file drawutils.c.

void ff_copy_rectangle ( uint8_t dst[4],
int  dst_linesize[4],
uint8_t src[4],
int  src_linesize[4],
int  pixelstep[4],
int  hsub,
int  vsub,
int  x,
int  y,
int  y2,
int  w,
int  h 
)

Definition at line 154 of file drawutils.c.

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. No flags currently defined.

Returns
0 for success, < 0 for error

Definition at line 176 of file drawutils.c.

Referenced by config_input(), config_props(), ff_draw_supported_pixel_formats(), and main().

void ff_draw_color ( FFDrawContext draw,
FFDrawColor color,
const uint8_t  rgba[4] 
)

Prepare a color.

Definition at line 221 of file drawutils.c.

Referenced by config_input(), config_props(), draw_text(), main(), overlay_ass_image(), and update_color_with_alpha().

static uint8_t* pointer_at ( FFDrawContext draw,
uint8_t data[],
int  linesize[],
int  plane,
int  x,
int  y 
)
static
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 282 of file drawutils.c.

Referenced by filter_frame().

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 304 of file drawutils.c.

Referenced by draw_blank_frame(), filter_color2(), and filter_frame().

static void clip_interval ( int  wmax,
int *  x,
int *  w,
int *  dx 
)
static

Clip interval [x; x+w[ within [0; wmax[.

The resulting w may be negative if the final interval is empty. dx, if not null, return the difference between in and out value of x.

Definition at line 345 of file drawutils.c.

Referenced by ff_blend_mask(), and ff_blend_rectangle().

static void subsampling_bounds ( int  sub,
int *  x,
int *  w,
int *  start,
int *  end 
)
static

Decompose w pixels starting at x into start + (w starting at x) + end with x and w aligned on multiples of 1<<sub.

Definition at line 364 of file drawutils.c.

Referenced by ff_blend_mask(), and ff_blend_rectangle().

static int component_used ( FFDrawContext draw,
int  plane,
int  comp 
)
static

Definition at line 376 of file drawutils.c.

Referenced by ff_blend_mask(), and ff_blend_rectangle().

static void blend_line ( uint8_t dst,
unsigned  src,
unsigned  alpha,
int  dx,
int  w,
unsigned  hsub,
int  left,
int  right 
)
static

Definition at line 384 of file drawutils.c.

Referenced by ff_blend_rectangle().

static void blend_line16 ( uint8_t dst,
unsigned  src,
unsigned  alpha,
int  dx,
int  w,
unsigned  hsub,
int  left,
int  right 
)
static

Definition at line 406 of file drawutils.c.

Referenced by 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 431 of file drawutils.c.

Referenced by draw_text().

static void blend_pixel16 ( uint8_t dst,
unsigned  src,
unsigned  alpha,
const uint8_t mask,
int  mask_linesize,
int  l2depth,
unsigned  w,
unsigned  h,
unsigned  shift,
unsigned  xm0 
)
static

Definition at line 511 of file drawutils.c.

Referenced by blend_line_hv16().

static void blend_pixel ( uint8_t dst,
unsigned  src,
unsigned  alpha,
const uint8_t mask,
int  mask_linesize,
int  l2depth,
unsigned  w,
unsigned  h,
unsigned  shift,
unsigned  xm0 
)
static

Definition at line 535 of file drawutils.c.

Referenced by blend_line_hv().

static void blend_line_hv16 ( uint8_t dst,
int  dst_delta,
unsigned  src,
unsigned  alpha,
const uint8_t mask,
int  mask_linesize,
int  l2depth,
int  w,
unsigned  hsub,
unsigned  vsub,
int  xm,
int  left,
int  right,
int  hband 
)
static

Definition at line 558 of file drawutils.c.

Referenced by ff_blend_mask().

static void blend_line_hv ( uint8_t dst,
int  dst_delta,
unsigned  src,
unsigned  alpha,
const uint8_t mask,
int  mask_linesize,
int  l2depth,
int  w,
unsigned  hsub,
unsigned  vsub,
int  xm,
int  left,
int  right,
int  hband 
)
static

Definition at line 583 of file drawutils.c.

Referenced by 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
drawdraw context
colorcolor for the overlay;
dstdestination image
dst_linesizeline stride of the destination
dst_wwidth of the destination image
dst_hheight of the destination image
maskmask
mask_linesizeline stride of the mask
mask_wwidth of the mask
mask_hheight of the mask
l2depthlog2 of depth of the mask (0 for 1bpp, 3 for 8bpp)
endiannessbit order of the mask (0: MSB to the left)
x0horizontal position of the overlay
y0vertical position of the overlay

Definition at line 608 of file drawutils.c.

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

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

Round a dimension according to subsampling.

Parameters
drawdraw context
sub_dir0 for horizontal, 1 for vertical
round_dir0 nearest, -1 round down, +1 round up
valuevalue to round
Returns
the rounded value

Definition at line 705 of file drawutils.c.

Referenced by config_input().

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 717 of file drawutils.c.

Referenced by query_formats().