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[pattern] Use a solid pattern for a uniform gradient.

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If each color stop in a gradient is identical, replace the gradient
surface with a simple solid surface. As seen in the wild.
This commit is contained in:
Chris Wilson 2008-12-18 00:47:08 +00:00
parent 25a4677200
commit 2d790daa95
1 changed files with 39 additions and 15 deletions
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54
src/cairo-pattern.c
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@ -2073,19 +2073,15 @@ _cairo_pattern_acquire_surface (const cairo_pattern_t *pattern,
if (src->n_stops) if (src->n_stops)
{ {
cairo_color_t color; _cairo_pattern_init_solid (&solid,
&src->stops->color,
_cairo_color_init_rgba (&color, CAIRO_CONTENT_COLOR_ALPHA);
src->stops->color.red,
src->stops->color.green,
src->stops->color.blue,
src->stops->color.alpha);
_cairo_pattern_init_solid (&solid, &color, CAIRO_CONTENT_COLOR_ALPHA);
} }
else else
{ {
_cairo_pattern_init_solid (&solid, CAIRO_COLOR_TRANSPARENT, CAIRO_CONTENT_ALPHA); _cairo_pattern_init_solid (&solid,
CAIRO_COLOR_TRANSPARENT,
CAIRO_CONTENT_ALPHA);
} }
status = _cairo_pattern_acquire_surface_for_solid (&solid, dst, status = _cairo_pattern_acquire_surface_for_solid (&solid, dst,
@ -2096,11 +2092,39 @@ _cairo_pattern_acquire_surface (const cairo_pattern_t *pattern,
} }
else else
{ {
status = _cairo_pattern_acquire_surface_for_gradient (src, dst, unsigned int i;
x, y,
width, height, /* Is the gradient a uniform colour?
surface_out, * Happens more often than you would believe.
attributes); */
for (i = 1; i < src->n_stops; i++) {
if (! _cairo_color_equal (&src->stops[0].color,
&src->stops[i].color))
{
break;
}
}
if (i == src->n_stops) {
cairo_solid_pattern_t solid;
_cairo_pattern_init_solid (&solid,
&src->stops->color,
CAIRO_CONTENT_COLOR_ALPHA);
status =
_cairo_pattern_acquire_surface_for_solid (&solid, dst,
x, y,
width, height,
surface_out,
attributes);
} else {
status =
_cairo_pattern_acquire_surface_for_gradient (src, dst,
x, y,
width, height,
surface_out,
attributes);
}
} }
} break; } break;
case CAIRO_PATTERN_TYPE_SURFACE: { case CAIRO_PATTERN_TYPE_SURFACE: {