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[hb-cairo] Don't call get_foreground_color unnecessarily 

That would invalidate cairo cache on foreground change, even
if the glyph doesn't need that.
This commit is contained in:
Behdad Esfahbod 2023-01-23 15:53:26 -07:00 committed by Matthias Clasen
parent c37ea4f93e
commit 4afdbcbad5
2 changed files with 42 additions and 23 deletions
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42
src/hb-cairo-utils.cc
View File

@ -274,6 +274,28 @@ _hb_cairo_normalize_color_line (hb_color_stop_t *stops,
*omax = max;
}
static void
_hb_cairo_get_color_stops (hb_cairo_context_t *c,
hb_color_line_t *color_line,
unsigned *count,
hb_color_stop_t **stops)
{
unsigned len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr);
if (len > *count)
*stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, *stops);
for (unsigned i = 0; i < len; i++)
if ((*stops)[i].is_foreground)
{
double r, g, b, a;
cairo_user_scaled_font_get_foreground_color (c->scaled_font, &r, &g, &b, &a);
(*stops)[i].color = HB_COLOR (round (b * 255.), round (g * 255.), round (r * 255.),
round (a * hb_color_get_alpha ((*stops)[i].color)));
}
*count = len;
}
void
_hb_cairo_paint_linear_gradient (hb_cairo_context_t *c,
hb_color_line_t *color_line,
@ -285,19 +307,16 @@ _hb_cairo_paint_linear_gradient (hb_cairo_context_t *c,
hb_color_stop_t stops_[PREALLOCATED_COLOR_STOPS];
hb_color_stop_t *stops = stops_;
unsigned int len;
unsigned int len = PREALLOCATED_COLOR_STOPS;
float xx0, yy0, xx1, yy1;
float xxx0, yyy0, xxx1, yyy1;
float min, max;
cairo_pattern_t *pattern;
len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr);
if (len > PREALLOCATED_COLOR_STOPS)
stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops);
_hb_cairo_get_color_stops (c, color_line, &len, &stops);
_hb_cairo_normalize_color_line (stops, len, &min, &max);
_hb_cairo_reduce_anchors (x0, y0, x1, y1, x2, y2, &xx0, &yy0, &xx1, &yy1);
_hb_cairo_normalize_color_line (stops, len, &min, &max);
xxx0 = xx0 + min * (xx1 - xx0);
yyy0 = yy0 + min * (yy1 - yy0);
@ -341,11 +360,7 @@ _hb_cairo_paint_radial_gradient (hb_cairo_context_t *c,
float rr0, rr1;
cairo_pattern_t *pattern;
len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr);
if (len > PREALLOCATED_COLOR_STOPS)
stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops);
_hb_cairo_get_color_stops (c, color_line, &len, &stops);
_hb_cairo_normalize_color_line (stops, len, &min, &max);
xx0 = x0 + min * (x1 - x0);
@ -808,10 +823,7 @@ _hb_cairo_paint_sweep_gradient (hb_cairo_context_t *c,
float max_x, max_y, radius;
cairo_pattern_t *pattern;
len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr);
if (len > PREALLOCATED_COLOR_STOPS)
stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops);
_hb_cairo_get_color_stops (c, color_line, &len, &stops);
hb_qsort (stops, len, sizeof (hb_color_stop_t), _hb_cairo_cmp_color_stop);

13
src/hb-cairo.cc
View File

@ -251,6 +251,15 @@ hb_cairo_paint_color (hb_paint_funcs_t *pfuncs HB_UNUSED,
hb_cairo_context_t *c = (hb_cairo_context_t *) paint_data;
cairo_t *cr = c->cr;
if (use_foreground)
{
double r, g, b, a;
cairo_user_scaled_font_get_foreground_color (c->scaled_font,
&r, &g, &b, &a);
cairo_set_source_rgba (cr, r, g, b,
a * hb_color_get_alpha (color) / 255.);
}
else
cairo_set_source_rgba (cr,
hb_color_get_red (color) / 255.,
hb_color_get_green (color) / 255.,
@ -585,9 +594,7 @@ hb_cairo_render_color_glyph (cairo_scaled_font_t *scaled_font,
cairo_font_options_destroy (options);
#endif
double r, g, b, a;
cairo_user_scaled_font_get_foreground_color (scaled_font, &r, &g, &b, &a);
hb_color_t color = HB_COLOR (round (b * 255.), round (g * 255.), round (r * 255.), round (a * 255.));
hb_color_t color = HB_COLOR (0, 0, 0, 255);
hb_position_t x_scale, y_scale;
hb_font_get_scale (font, &x_scale, &y_scale);