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test,perf: Another hatching!

Browse source 
This one illustrates the quadratic explosion lurking in the clipping
code.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-07-19 00:31:18 +01:00
parent bf5892e2a6
commit 9ab9ecfdbd
6 changed files with 203 additions and 0 deletions
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1
perf/cairo-perf-micro.c
View file

@ -535,6 +535,7 @@ const cairo_perf_case_t perf_cases[] = {
{ text, 64, 512},
{ glyphs, 64, 512},
{ mask, 64, 512},
{ disjoint, 64, 512},
{ hatching, 64, 512},
{ tessellate, 100, 100},
{ subimage_copy, 16, 512},

1
perf/cairo-perf.h
View file

@ -188,6 +188,7 @@ CAIRO_PERF_DECL (paint_with_alpha);
CAIRO_PERF_DECL (mask);
CAIRO_PERF_DECL (stroke);
CAIRO_PERF_DECL (subimage_copy);
CAIRO_PERF_DECL (disjoint);
CAIRO_PERF_DECL (hatching);
CAIRO_PERF_DECL (tessellate);
CAIRO_PERF_DECL (text);

1
perf/micro/Makefile.sources
View file

@ -2,6 +2,7 @@ libcairo_perf_micro_sources = \
cairo-perf-cover.c \
box-outline.c \
composite-checker.c \
disjoint.c \
fill.c \
hatching.c \
long-lines.c \

95
perf/micro/disjoint.c Normal file
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@ -0,0 +1,95 @@
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright (c) 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <assert.h>
#include "cairo-perf.h"
#define STEP 5
static void path (cairo_t *cr, int width, int height)
{
int i;
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
cairo_translate (cr, width/2, height/2);
cairo_rotate (cr, M_PI/4);
cairo_translate (cr, -width/2, -height/2);
for (i = 0; i < width; i += STEP) {
cairo_rectangle (cr, i, -2, 1, height+4);
cairo_rectangle (cr, -2, i, width+4, 1);
}
}
static void clip (cairo_t *cr, int width, int height)
{
int i, j;
for (j = 0; j < height; j += 2*STEP) {
for (i = 0; i < width; i += 2*STEP)
cairo_rectangle (cr, i, j, STEP, STEP);
j += 2*STEP;
for (i = 0; i < width; i += 2*STEP)
cairo_rectangle (cr, i+STEP/2, j, STEP, STEP);
}
cairo_clip (cr);
}
static cairo_perf_ticks_t
draw (cairo_t *cr, int width, int height, int loops)
{
cairo_save (cr);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_perf_timer_start ();
while (loops--) {
cairo_save (cr);
clip (cr, width, height);
path (cr, width, height);
cairo_fill (cr);
cairo_restore (cr);
}
cairo_perf_timer_stop ();
cairo_restore (cr);
return cairo_perf_timer_elapsed ();
}
void
disjoint (cairo_perf_t *perf, cairo_t *cr, int width, int height)
{
if (! cairo_perf_can_run (perf, "disjoint", NULL))
return;
cairo_perf_run (perf, "disjoint", draw, NULL);
}

1
test/Makefile.sources
View file

@ -30,6 +30,7 @@ test_sources = \
clip-contexts.c \
clip-complex-shape.c \
clip-disjoint.c \
clip-disjoint-hatching.c \
clip-device-offset.c \
clip-draw-unbounded.c \
clip-empty.c \

104
test/clip-disjoint-hatching.c Normal file
View file

@ -0,0 +1,104 @@
/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Author: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
#define STEP 5
#define WIDTH 100
#define HEIGHT 100
static void hatching (cairo_t *cr)
{
int i;
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
cairo_translate (cr, WIDTH/2, HEIGHT/2);
cairo_rotate (cr, M_PI/4);
cairo_translate (cr, -WIDTH/2, -HEIGHT/2);
for (i = 0; i < WIDTH; i += STEP) {
cairo_rectangle (cr, i, -2, 1, HEIGHT+4);
cairo_rectangle (cr, -2, i, WIDTH+4, 1);
}
}
static void background (cairo_t *cr)
{
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgb (cr, 1,1,1);
cairo_paint (cr);
}
static void clip_to_grid (cairo_t *cr)
{
int i, j;
for (j = 0; j < HEIGHT; j += 2*STEP) {
for (i = 0; i < WIDTH; i += 2*STEP)
cairo_rectangle (cr, i, j, STEP, STEP);
j += 2*STEP;
for (i = 0; i < WIDTH; i += 2*STEP)
cairo_rectangle (cr, i+STEP/2, j, STEP, STEP);
}
cairo_clip (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
background (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_save (cr); {
clip_to_grid (cr);
hatching (cr);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_fill (cr);
} cairo_restore (cr);
cairo_translate (cr, 0.25, HEIGHT+.25);
cairo_save (cr); {
clip_to_grid (cr);
hatching (cr);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_fill (cr);
} cairo_restore (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (clip_disjoint_hatching,
"Test drawing through through an array of clips",
"clip", /* keywords */
"target=raster", /* requirements */
WIDTH, 2*HEIGHT,
NULL, draw)