1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_DRAWUTILS_H
#define AVFILTER_DRAWUTILS_H
/**
* @file
* misc drawing utilities
*/
#include <stdint.h>
#include "avfilter.h"
#include "libavutil/pixfmt.h"
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[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);
#define MAX_PLANES 4
typedef struct FFDrawContext {
const struct AVPixFmtDescriptor *desc;
enum AVPixelFormat format;
unsigned nb_planes;
int pixelstep[MAX_PLANES]; /*< offset between pixels */
uint8_t comp_mask[MAX_PLANES]; /*< bitmask of used non-alpha components */
uint8_t hsub[MAX_PLANES]; /*< horizontal subsampling */
uint8_t vsub[MAX_PLANES]; /*< vertical subsampling */
uint8_t hsub_max;
uint8_t vsub_max;
int full_range;
unsigned flags;
} FFDrawContext;
typedef struct FFDrawColor {
uint8_t rgba[4];
union {
uint32_t u32[4];
uint16_t u16[8];
uint8_t u8[16];
} comp[MAX_PLANES];
} FFDrawColor;
/**
* Process alpha pixel component.
*/
#define FF_DRAW_PROCESS_ALPHA 1
/**
* 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.
* @return 0 for success, < 0 for error
*/
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags);
/**
* Prepare a color.
*/
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]);
/**
* Copy a rectangle from an image to another.
*
* The coordinates must be as even as the subsampling requires.
*/
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);
/**
* 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.
*/
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
uint8_t *dst[], int dst_linesize[],
int dst_x, int dst_y, int w, int h);
/**
* Blend a rectangle with an uniform color.
*/
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 an alpha mask with an uniform color.
*
* @param draw draw context
* @param color color for the overlay;
* @param dst destination image
* @param dst_linesize line stride of the destination
* @param dst_w width of the destination image
* @param dst_h height of the destination image
* @param mask mask
* @param mask_linesize line stride of the mask
* @param mask_w width of the mask
* @param mask_h height of the mask
* @param l2depth log2 of depth of the mask (0 for 1bpp, 3 for 8bpp)
* @param endianness bit order of the mask (0: MSB to the left)
* @param x0 horizontal position of the overlay
* @param y0 vertical position of the overlay
*/
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);
/**
* Round a dimension according to subsampling.
*
* @param draw draw context
* @param sub_dir 0 for horizontal, 1 for vertical
* @param round_dir 0 nearest, -1 round down, +1 round up
* @param value value to round
* @return the rounded value
*/
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
int value);
/**
* Return the list of pixel formats supported by the draw functions.
*
* The flags are the same as ff_draw_init, i.e., none currently.
*/
AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags);
#endif /* AVFILTER_DRAWUTILS_H */
|
