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improve av_parse_color() to support html formatting

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Originally committed as revision 25743 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2010-11-13 13:49:58 +00:00
parent 8f55616fac
commit 521b860748
2 changed files with 18 additions and 6 deletions
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22
libavfilter/parseutils.c
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@ -187,9 +187,17 @@ int av_parse_color(uint8_t *rgba_color, const char *color_string, void *log_ctx)
{
char *tail, color_string2[128];
const ColorEntry *entry;
av_strlcpy(color_string2, color_string, sizeof(color_string2));
int len, hex_offset = 0;
if (color_string[0] == '#') {
hex_offset = 1;
} else if (!strncmp(color_string, "0x", 2))
hex_offset = 2;
av_strlcpy(color_string2, color_string + hex_offset, sizeof(color_string2));
if ((tail = strchr(color_string2, ALPHA_SEP)))
*tail++ = 0;
len = strlen(color_string2);
rgba_color[3] = 255;
if (!strcasecmp(color_string2, "random") || !strcasecmp(color_string2, "bikeshed")) {
@ -198,16 +206,16 @@ int av_parse_color(uint8_t *rgba_color, const char *color_string, void *log_ctx)
rgba_color[1] = rgba >> 16;
rgba_color[2] = rgba >> 8;
rgba_color[3] = rgba;
} else if (!strncmp(color_string2, "0x", 2)) {
} else if (hex_offset ||
strspn(color_string2, "0123456789ABCDEFabcdef") == len) {
char *tail;
int len = strlen(color_string2);
unsigned int rgba = strtoul(color_string2, &tail, 16);
if (*tail || (len != 8 && len != 10)) {
if (*tail || (len != 6 && len != 8)) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);
return AVERROR(EINVAL);
}
if (len == 10) {
if (len == 8) {
rgba_color[3] = rgba;
rgba >>= 8;
}
@ -276,6 +284,10 @@ int main(void)
"0xffXXee",
"0xfoobar",
"0xffffeeeeeeee",
"#ff0000",
"#ffXX00",
"ff0000",
"ffXX00",
"red@foo",
"random@10",
"0xff0000@1.0",

2
libavfilter/parseutils.h
View File

@ -31,7 +31,7 @@
* Put the RGBA values that correspond to color_string in rgba_color.
*
* @param color_string a string specifying a color. It can be the name of
* a color (case insensitive match) or a 0xRRGGBB[AA] sequence,
* a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
* possibly followed by "@" and a string representing the alpha
* component.
* The alpha component may be a string composed by "0x" followed by an