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[perf] Add a single shot long-lines

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Compare the performance of self-intersection removal by comparing the cost
of individually stroking each line versus stroking them all en-mass.
This commit is contained in:
Chris Wilson 2009-07-30 10:35:11 +01:00
parent 2f033af5ab
commit 3dbc4170f0
1 changed files with 34 additions and 11 deletions
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45
perf/long-lines.c
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@ -35,7 +35,10 @@
* same lines, (this is the "long-lines-cropped" report).
*/
typedef enum { LONG_LINES_UNCROPPED, LONG_LINES_CROPPED } long_lines_crop_t;
typedef enum {
LONG_LINES_CROPPED = 0x1,
LONG_LINES_ONCE = 0x2,
} long_lines_crop_t;
#define NUM_LINES 20
#define LONG_FACTOR 50.0
@ -50,14 +53,14 @@ do_long_lines (cairo_t *cr, int width, int height, long_lines_crop_t crop)
cairo_translate (cr, width / 2, height / 2);
if (crop == LONG_LINES_UNCROPPED) {
outer_width = LONG_FACTOR * width;
outer_height = LONG_FACTOR * height;
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); /* red */
} else {
if (crop & LONG_LINES_CROPPED) {
outer_width = width;
outer_height = height;
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); /* green */
} else {
outer_width = LONG_FACTOR * width;
outer_height = LONG_FACTOR * height;
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); /* red */
}
min_x = x = - outer_width / 2.0;
@ -72,23 +75,29 @@ do_long_lines (cairo_t *cr, int width, int height, long_lines_crop_t crop)
for (i = 0; i <= NUM_LINES; i++) {
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, x, min_y);
cairo_stroke (cr);
if ((crop & LONG_LINES_ONCE) == 0)
cairo_stroke (cr);
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, x, max_y);
cairo_stroke (cr);
if ((crop & LONG_LINES_ONCE) == 0)
cairo_stroke (cr);
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, min_x, y);
cairo_stroke (cr);
if ((crop & LONG_LINES_ONCE) == 0)
cairo_stroke (cr);
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, max_x, y);
cairo_stroke (cr);
if ((crop & LONG_LINES_ONCE) == 0)
cairo_stroke (cr);
x += dx;
y += dy;
}
if (crop & LONG_LINES_ONCE)
cairo_stroke (cr);
cairo_perf_timer_stop ();
@ -100,7 +109,13 @@ do_long_lines (cairo_t *cr, int width, int height, long_lines_crop_t crop)
static cairo_perf_ticks_t
long_lines_uncropped (cairo_t *cr, int width, int height)
{
return do_long_lines (cr, width, height, LONG_LINES_UNCROPPED);
return do_long_lines (cr, width, height, 0);
}
static cairo_perf_ticks_t
long_lines_uncropped_once (cairo_t *cr, int width, int height)
{
return do_long_lines (cr, width, height, LONG_LINES_ONCE);
}
static cairo_perf_ticks_t
@ -109,6 +124,12 @@ long_lines_cropped (cairo_t *cr, int width, int height)
return do_long_lines (cr, width, height, LONG_LINES_CROPPED);
}
static cairo_perf_ticks_t
long_lines_cropped_once (cairo_t *cr, int width, int height)
{
return do_long_lines (cr, width, height, LONG_LINES_CROPPED | LONG_LINES_ONCE);
}
void
long_lines (cairo_perf_t *perf, cairo_t *cr, int width, int height)
{
@ -116,5 +137,7 @@ long_lines (cairo_perf_t *perf, cairo_t *cr, int width, int height)
return;
cairo_perf_run (perf, "long-lines-uncropped", long_lines_uncropped);
cairo_perf_run (perf, "long-lines-uncropped-once", long_lines_uncropped_once);
cairo_perf_run (perf, "long-lines-cropped", long_lines_cropped);
cairo_perf_run (perf, "long-lines-cropped-once", long_lines_cropped_once);
}