forked from enlightenment/efl
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
#include "efl_gfx_color_internal.h"
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EAPI int
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_gfx_color_format_clean_param(Eina_Tmpstr *s)
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{
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Eina_Tmpstr *ss;
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char *ds;
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int len = 0;
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ds = (char*) s;
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for (ss = s; *ss; ss++, ds++, len++)
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{
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if ((*ss == '\\') && *(ss + 1)) ss++;
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if (ds != ss) *ds = *ss;
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}
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*ds = 0;
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return len;
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}
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static int
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_hex_string_get(char ch, Eina_Bool *ok)
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{
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if ((ch >= '0') && (ch <= '9')) return (ch - '0');
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else if ((ch >= 'A') && (ch <= 'F')) return (ch - 'A' + 10);
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else if ((ch >= 'a') && (ch <= 'f')) return (ch - 'a' + 10);
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*ok = EINA_FALSE;
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return 0;
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}
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/**
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* @internal
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* Parses a string of one of the formas:
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* 1. "#RRGGBB"
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* 2. "#RRGGBBAA"
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* 3. "#RGB"
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* 4. "#RGBA"
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* To the rgba values.
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*
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* @param[in] str The string to parse - NOT NULL.
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* @param[out] r The Red value - NOT NULL.
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* @param[out] g The Green value - NOT NULL.
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* @param[out] b The Blue value - NOT NULL.
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* @param[out] a The Alpha value - NOT NULL.
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*/
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EAPI Eina_Bool
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_gfx_color_format_color_parse(const char *str, int slen,
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unsigned char *r, unsigned char *g,
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unsigned char *b, unsigned char *a)
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{
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Eina_Bool v = EINA_TRUE;
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*r = *g = *b = *a = 0;
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if (slen == 7) /* #RRGGBB */
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{
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*r = (_hex_string_get(str[1], &v) << 4) | (_hex_string_get(str[2], &v));
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*g = (_hex_string_get(str[3], &v) << 4) | (_hex_string_get(str[4], &v));
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*b = (_hex_string_get(str[5], &v) << 4) | (_hex_string_get(str[6], &v));
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*a = 0xff;
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}
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else if (slen == 9) /* #RRGGBBAA */
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{
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*r = (_hex_string_get(str[1], &v) << 4) | (_hex_string_get(str[2], &v));
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*g = (_hex_string_get(str[3], &v) << 4) | (_hex_string_get(str[4], &v));
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*b = (_hex_string_get(str[5], &v) << 4) | (_hex_string_get(str[6], &v));
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*a = (_hex_string_get(str[7], &v) << 4) | (_hex_string_get(str[8], &v));
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}
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else if (slen == 4) /* #RGB */
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{
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*r = _hex_string_get(str[1], &v);
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*r = (*r << 4) | *r;
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*g = _hex_string_get(str[2], &v);
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*g = (*g << 4) | *g;
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*b = _hex_string_get(str[3], &v);
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*b = (*b << 4) | *b;
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*a = 0xff;
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}
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else if (slen == 5) /* #RGBA */
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{
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*r = _hex_string_get(str[1], &v);
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*r = (*r << 4) | *r;
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*g = _hex_string_get(str[2], &v);
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*g = (*g << 4) | *g;
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*b = _hex_string_get(str[3], &v);
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*b = (*b << 4) | *b;
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*a = _hex_string_get(str[4], &v);
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*a = (*a << 4) | *a;
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}
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else v = EINA_FALSE;
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*r = (*r * *a) / 255;
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*g = (*g * *a) / 255;
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*b = (*b * *a) / 255;
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return v;
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}
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