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#include<stdio.h>
#include<stdlib.h>
#include<stdint.h>
#include<stdbool.h>
#include<string.h>
#include<cairo/cairo.h>
#include"wlclock.h"
#include"misc.h"
#include"colour.h"
static bool colour_from_hex_string (struct Wlclock_colour *colour, const char *hex)
{
unsigned int r = 0, g = 0, b = 0, a = 255;
if ( 4 != sscanf(hex, "#%02x%02x%02x%02x", &r, &g, &b, &a)
&& 3 != sscanf(hex, "#%02x%02x%02x", &r, &g, &b)
&& 4 != sscanf(hex, "0x%02x%02x%02x%02x", &r, &g, &b, &a)
&& 3 != sscanf(hex, "0x%02x%02x%02x", &r, &g, &b) )
return false;
colour->r = (float)r / 255.0f;
colour->g = (float)g / 255.0f;
colour->b = (float)b / 255.0f;
colour->a = (float)a / 255.0f;
return true;
}
static bool colour_from_rgb_string (struct Wlclock_colour *colour, const char *str)
{
int32_t r = 0, g = 0, b = 0, a = 255;
if ( 4 != sscanf(str, "rgba(%d,%d,%d,%d)", &r, &g, &b, &a)
&& 3 != sscanf(str, "rgb(%d,%d,%d)", &r, &g, &b) )
return false;
if ( r > 255 || g > 255 || b > 255 || a > 255 )
return false;
if ( r < 0 || g < 0 || b < 0 || a < 0 )
return false;
colour->r = (float)r / 255.0f;
colour->g = (float)g / 255.0f;
colour->b = (float)b / 255.0f;
colour->a = (float)a / 255.0f;
return true;
}
bool colour_from_string (struct Wlclock_colour *colour, const char *str)
{
if ( colour == NULL || str == NULL || *str == '\0' )
goto error;
if ( *str == '#' || strstr(str, "0x") == str )
{
if (! colour_from_hex_string(colour, str))
goto error;
}
else if ( strstr(str, "rgb") == str )
{
if (! colour_from_rgb_string(colour, str))
goto error;
}
else
goto error;
return true;
error:
clocklog(0, "ERROR: \"%s\" is not a valid colour.\n");
return false;
}
void colour_set_cairo_source (cairo_t *cairo, struct Wlclock_colour *colour)
{
cairo_set_source_rgba(cairo, colour->r, colour->g, colour->b, colour->a);
}
bool colour_is_transparent (struct Wlclock_colour *colour)
{
return colour->a == 0.0;
}
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