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csscolorvalue: Compute alpha/shade/mix of color literals directly

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The values of these are never gonna change so we can as well create
literal color values from the resulting colors instead.
This commit is contained in:
Timm Bäder 2020-01-09 11:54:58 +01:00
parent 06dbde22a0
commit 515a527b27
1 changed files with 69 additions and 10 deletions
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79
gtk/gtkcsscolorvalue.c
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@ -289,6 +289,41 @@ static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
gtk_css_value_color_print
};
static void
apply_alpha (const GdkRGBA *in,
GdkRGBA *out,
double factor)
{
*out = *in;
out->alpha = CLAMP (in->alpha * factor, 0, 1);
}
static void
apply_shade (const GdkRGBA *in,
GdkRGBA *out,
double factor)
{
GtkHSLA hsla;
_gtk_hsla_init_from_rgba (&hsla, in);
_gtk_hsla_shade (&hsla, &hsla, factor);
_gdk_rgba_init_from_hsla (out, &hsla);
}
static void
apply_mix (const GdkRGBA *in1,
const GdkRGBA *in2,
GdkRGBA *out,
double factor)
{
out->red = CLAMP (in1->red + ((in2->red - in1->red) * factor), 0, 1);
out->green = CLAMP (in1->green + ((in2->green - in1->green) * factor), 0, 1);
out->blue = CLAMP (in1->blue + ((in2->blue - in1->blue) * factor), 0, 1);
out->alpha = CLAMP (in1->alpha + ((in2->alpha - in1->alpha) * factor), 0, 1);
}
GtkCssValue *
_gtk_css_color_value_resolve (GtkCssValue *color,
GtkStyleProvider *provider,
@ -326,17 +361,13 @@ _gtk_css_color_value_resolve (GtkCssValue *color,
case COLOR_TYPE_SHADE:
{
GtkCssValue *val;
GtkHSLA hsla;
GdkRGBA shade;
val = _gtk_css_color_value_resolve (color->sym_col.shade.color, provider, current, cycle_list);
if (val == NULL)
return NULL;
_gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
_gtk_hsla_shade (&hsla, &hsla, color->sym_col.shade.factor);
_gdk_rgba_init_from_hsla (&shade, &hsla);
apply_shade (_gtk_css_rgba_value_get_rgba (val), &shade, color->sym_col.shade.factor);
_gtk_css_value_unref (val);
@ -354,7 +385,7 @@ _gtk_css_color_value_resolve (GtkCssValue *color,
return NULL;
alpha = *_gtk_css_rgba_value_get_rgba (val);
alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
apply_alpha (&alpha, &alpha, color->sym_col.alpha.factor);
_gtk_css_value_unref (val);
@ -379,10 +410,7 @@ _gtk_css_color_value_resolve (GtkCssValue *color,
color2 = *_gtk_css_rgba_value_get_rgba (val);
_gtk_css_value_unref (val);
res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
apply_mix (&color1, &color2, &res, color->sym_col.mix.factor);
value =_gtk_css_rgba_value_new_from_rgba (&res);
}
@ -467,6 +495,15 @@ _gtk_css_color_value_new_shade (GtkCssValue *color,
gtk_internal_return_val_if_fail (color->class == &GTK_CSS_VALUE_COLOR, NULL);
if (color->type == COLOR_TYPE_LITERAL)
{
GdkRGBA c = *_gtk_css_rgba_value_get_rgba (color->last_value);
apply_shade (&c, &c, factor);
return _gtk_css_color_value_new_literal (&c);
}
value = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_COLOR);
value->type = COLOR_TYPE_SHADE;
value->sym_col.shade.color = _gtk_css_value_ref (color);
@ -483,6 +520,15 @@ _gtk_css_color_value_new_alpha (GtkCssValue *color,
gtk_internal_return_val_if_fail (color->class == &GTK_CSS_VALUE_COLOR, NULL);
if (color->type == COLOR_TYPE_LITERAL)
{
GdkRGBA c = *_gtk_css_rgba_value_get_rgba (color->last_value);
apply_alpha (&c, &c, factor);
return _gtk_css_color_value_new_literal (&c);
}
value = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_COLOR);
value->type = COLOR_TYPE_ALPHA;
value->sym_col.alpha.color = _gtk_css_value_ref (color);
@ -501,6 +547,19 @@ _gtk_css_color_value_new_mix (GtkCssValue *color1,
gtk_internal_return_val_if_fail (color1->class == &GTK_CSS_VALUE_COLOR, NULL);
gtk_internal_return_val_if_fail (color2->class == &GTK_CSS_VALUE_COLOR, NULL);
if (color1->type == COLOR_TYPE_LITERAL &&
color2->type == COLOR_TYPE_LITERAL)
{
GdkRGBA c1 = *_gtk_css_rgba_value_get_rgba (color1->last_value);
GdkRGBA c2 = *_gtk_css_rgba_value_get_rgba (color2->last_value);
GdkRGBA result;
apply_mix (&c1, &c2, &result, factor);
return _gtk_css_color_value_new_literal (&result);
}
value = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_COLOR);
value->type = COLOR_TYPE_MIX;
value->sym_col.mix.color1 = _gtk_css_value_ref (color1);