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css: Use snapshot api for radial gradients

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This commit is contained in:
Matthias Clasen 2020-09-12 00:07:38 -04:00 committed by Timm Bäder
parent 66d16049c3
commit 2881d347d3
1 changed files with 30 additions and 37 deletions
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67
gtk/gtkcssimageradial.c
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@ -80,18 +80,13 @@ gtk_css_image_radial_snapshot (GtkCssImage *image,
double height)
{
GtkCssImageRadial *radial = GTK_CSS_IMAGE_RADIAL (image);
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
GskColorStop *stops;
double x, y;
double radius, yscale;
double start, end;
double r1, r2, r3, r4, r;
double offset;
int i, last;
cairo_t *cr;
cr = gtk_snapshot_append_cairo (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height));
x = _gtk_css_position_value_get_x (radial->position, width);
y = _gtk_css_position_value_get_y (radial->position, height);
@ -167,20 +162,10 @@ gtk_css_image_radial_snapshot (GtkCssImage *image,
gtk_css_image_radial_get_start_end (radial, radius, &start, &end);
pattern = cairo_pattern_create_radial (0, 0, radius * start, 0, 0, radius * end);
if (yscale != 1.0)
{
cairo_matrix_init_scale (&matrix, 1.0, 1.0 / yscale);
cairo_pattern_set_matrix (pattern, &matrix);
}
if (radial->repeating)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
else
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
offset = start;
last = -1;
stops = g_newa (GskColorStop, radial->n_stops);
for (i = 0; i < radial->n_stops; i++)
{
const GtkCssImageRadialColorStop *stop = &radial->color_stops[i];
@ -196,39 +181,47 @@ gtk_css_image_radial_snapshot (GtkCssImage *image,
continue;
}
else
pos = _gtk_css_number_value_get (stop->offset, radius) / radius;
{
pos = _gtk_css_number_value_get (stop->offset, radius) / radius;
pos = CLAMP (pos, 0.0, 1.0);
}
pos = MAX (pos, 0);
pos = MAX (pos, offset);
step = (pos - offset) / (i - last);
for (last = last + 1; last <= i; last++)
{
const GdkRGBA *rgba;
stop = &radial->color_stops[last];
rgba = gtk_css_color_value_get_rgba (stop->color);
offset += step;
cairo_pattern_add_color_stop_rgba (pattern,
(offset - start) / (end - start),
rgba->red,
rgba->green,
rgba->blue,
rgba->alpha);
stops[last].offset = (offset - start) / (end - start);
stops[last].color = *gtk_css_color_value_get_rgba (stop->color);
}
offset = pos;
last = i;
}
cairo_rectangle (cr, 0, 0, width, height);
cairo_translate (cr, x, y);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
cairo_destroy (cr);
if (radial->repeating)
gtk_snapshot_append_repeating_radial_gradient (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height),
&GRAPHENE_POINT_INIT (x, y),
radius,
yscale,
start,
end,
stops,
radial->n_stops);
else
gtk_snapshot_append_radial_gradient (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height),
&GRAPHENE_POINT_INIT (x, y),
radius,
yscale,
start,
end,
stops,
radial->n_stops);
}
static guint