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lavfi: add internal function ff_fill_rgba_map()

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This commit is contained in:
Stefano Sabatini 2011-10-24 19:58:48 +02:00
parent b76bc01034
commit 8dc90371b1
2 changed files with 18 additions and 11 deletions
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27
libavfilter/drawutils.c
View File

@ -23,6 +23,21 @@
enum { RED = 0, GREEN, BLUE, ALPHA };
int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt)
{
switch (pix_fmt) {
case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
case PIX_FMT_RGBA:
case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
case PIX_FMT_BGRA:
case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
default: /* unsupported */
return AVERROR(EINVAL);
}
return 0;
}
int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
enum PixelFormat pix_fmt, uint8_t rgba_color[4],
int *is_packed_rgba, uint8_t rgba_map_ptr[4])
@ -32,17 +47,7 @@ int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
int hsub = pix_desc->log2_chroma_w;
*is_packed_rgba = 1;
switch (pix_fmt) {
case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
case PIX_FMT_RGBA:
case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
case PIX_FMT_BGRA:
case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
default:
*is_packed_rgba = 0;
}
*is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
if (*is_packed_rgba) {
pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;

2
libavfilter/drawutils.h
View File

@ -27,6 +27,8 @@
#include <stdint.h>
#include "libavutil/pixfmt.h"
int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt);
int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w,
uint8_t dst_color[4],
enum PixelFormat pix_fmt, uint8_t rgba_color[4],