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[perf] Cover linear gradient with 3 stops.

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The i915 is able to special case gradients with just 2 color stops to
avoid creating temporary gradient textures, so add a 3 stop linear
gradient to compare the speed difference.
This commit is contained in:
Chris Wilson 2009-01-12 01:00:30 +00:00
parent 7cbc55f216
commit de9e6b5a3f
1 changed files with 36 additions and 0 deletions
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36
perf/cairo-perf-cover.c
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@ -224,6 +224,40 @@ set_source_linear_rgba (cairo_t *cr,
cairo_pattern_destroy (linear);
}
static void
set_source_linear3_rgb (cairo_t *cr,
int width,
int height)
{
cairo_pattern_t *linear;
linear = cairo_pattern_create_linear (0.0, 0.0, width, height);
cairo_pattern_add_color_stop_rgb (linear, 0.0, 1, 0, 0); /* red */
cairo_pattern_add_color_stop_rgb (linear, 0.5, 0, 1, 0); /* green */
cairo_pattern_add_color_stop_rgb (linear, 1.0, 0, 0, 1); /* blue */
cairo_set_source (cr, linear);
cairo_pattern_destroy (linear);
}
static void
set_source_linear3_rgba (cairo_t *cr,
int width,
int height)
{
cairo_pattern_t *linear;
linear = cairo_pattern_create_linear (0.0, 0.0, width, height);
cairo_pattern_add_color_stop_rgba (linear, 0.0, 1, 0, 0, 0.5); /* 50% red */
cairo_pattern_add_color_stop_rgba (linear, 0.5, 0, 1, 0, 0.0); /* 0% green */
cairo_pattern_add_color_stop_rgba (linear, 1.0, 0, 0, 1, 0.5); /* 50% blue */
cairo_set_source (cr, linear);
cairo_pattern_destroy (linear);
}
static void
set_source_radial_rgb (cairo_t *cr,
int width,
@ -282,6 +316,8 @@ cairo_perf_cover_sources_and_operators (cairo_perf_t *perf,
{ set_source_similar_surface_rgba_min, "similar_rgba_min" },
{ set_source_linear_rgb, "linear_rgb" },
{ set_source_linear_rgba, "linear_rgba" },
{ set_source_linear3_rgb, "linear3_rgb" },
{ set_source_linear3_rgba, "linear3_rgba" },
{ set_source_radial_rgb, "radial_rgb" },
{ set_source_radial_rgba, "radial_rgba" }
};