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[cairo-color] Add cairo-private _cairo_color_double_to_short()

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This commit is contained in:
Behdad Esfahbod 2007-03-13 16:13:35 -04:00
parent 956fdfbb62
commit 60502ba348
2 changed files with 9 additions and 5 deletions
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11
src/cairo-color.c
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@ -95,7 +95,8 @@ _cairo_color_init_rgb (cairo_color_t *color,
* then special-casing the result of an input value of 1.0 so that it
* maps to 65535 instead of 65536.
*/
static inline uint16_t _color_to_short (double d)
uint16_t
_cairo_color_double_to_short (double d)
{
uint32_t i;
i = (uint32_t) (d * 65536);
@ -106,10 +107,10 @@ static inline uint16_t _color_to_short (double d)
static void
_cairo_color_compute_shorts (cairo_color_t *color)
{
color->red_short = _color_to_short (color->red * color->alpha);
color->green_short = _color_to_short (color->green * color->alpha);
color->blue_short = _color_to_short (color->blue * color->alpha);
color->alpha_short = _color_to_short (color->alpha);
color->red_short = _cairo_color_double_to_short (color->red * color->alpha);
color->green_short = _cairo_color_double_to_short (color->green * color->alpha);
color->blue_short = _cairo_color_double_to_short (color->blue * color->alpha);
color->alpha_short = _cairo_color_double_to_short (color->alpha);
}
void

3
src/cairoint.h
View file

@ -1589,6 +1589,9 @@ _cairo_stock_color (cairo_stock_t stock);
#define CAIRO_COLOR_BLACK _cairo_stock_color (CAIRO_STOCK_BLACK)
#define CAIRO_COLOR_TRANSPARENT _cairo_stock_color (CAIRO_STOCK_TRANSPARENT)
cairo_private uint16_t
_cairo_color_double_to_short (double d);
cairo_private void
_cairo_color_init (cairo_color_t *color);