mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 04:40:07 +01:00
78a5d543b6
The comment said that using CAIRO_OPERATOR_SOURCE for the background triggered a librsvg bug, but the relevant commit message does not even include a link to a librsvg bug. Also, changing it from OVER to SOURCE completely breaks these tests (the reference images don't match at all), so this comment is stale. Just remove it. Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
253 lines
7 KiB
C
253 lines
7 KiB
C
/*
|
|
* Copyright © 2005 Red Hat, Inc.
|
|
* Copyright © 2007 Emmanuel Pacaud
|
|
* Copyright © 2008 Benjamin Otte
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software
|
|
* and its documentation for any purpose is hereby granted without
|
|
* fee, provided that the above copyright notice appear in all copies
|
|
* and that both that copyright notice and this permission notice
|
|
* appear in supporting documentation, and that the name of
|
|
* Red Hat, Inc. not be used in advertising or publicity pertaining to
|
|
* distribution of the software without specific, written prior
|
|
* permission. Red Hat, Inc. makes no representations about the
|
|
* suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
|
|
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
|
|
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
|
|
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
|
|
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* Authors: Owen Taylor <otaylor@redhat.com>
|
|
* Kristian Høgsberg <krh@redhat.com>
|
|
* Emmanuel Pacaud <emmanuel.pacaud@lapp.in2p3.fr>
|
|
*/
|
|
|
|
#include "cairo-test.h"
|
|
#include <math.h>
|
|
#include <stdio.h>
|
|
|
|
#define STEPS 16
|
|
#define START_OPERATOR CAIRO_OPERATOR_MULTIPLY
|
|
#define STOP_OPERATOR CAIRO_OPERATOR_HSL_LUMINOSITY
|
|
|
|
#define SIZE 5
|
|
#define COUNT 4
|
|
#define FULL_WIDTH ((STEPS + 1) * COUNT - 1)
|
|
#define FULL_HEIGHT ((COUNT + STOP_OPERATOR - START_OPERATOR) / COUNT) * (STEPS + 1)
|
|
|
|
static void
|
|
set_solid_pattern (cairo_t *cr,
|
|
int step,
|
|
cairo_bool_t bg,
|
|
cairo_bool_t alpha)
|
|
{
|
|
double c, a;
|
|
|
|
a = ((double) step) / (STEPS - 1);
|
|
if (alpha) {
|
|
c = 1;
|
|
} else {
|
|
c = a;
|
|
a = 1;
|
|
}
|
|
|
|
if (bg) /* draw a yellow background fading in using discrete steps */
|
|
cairo_set_source_rgba (cr, c, c, 0, a);
|
|
else /* draw a teal foreground pattern fading in using discrete steps */
|
|
cairo_set_source_rgba (cr, 0, c, c, a);
|
|
}
|
|
|
|
/* expects a STEP*STEP pixel rectangle */
|
|
static void
|
|
do_blend_solid (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha)
|
|
{
|
|
int x;
|
|
|
|
cairo_save (cr);
|
|
cairo_scale (cr, SIZE, SIZE);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
|
|
for (x = 0; x < STEPS; x++) {
|
|
/* draw the background using discrete steps */
|
|
set_solid_pattern (cr, x, TRUE, alpha);
|
|
cairo_rectangle (cr, x, 0, 1, STEPS);
|
|
cairo_fill (cr);
|
|
}
|
|
|
|
cairo_set_operator (cr, op);
|
|
for (x = 0; x < STEPS; x++) {
|
|
/* draw an orthogonal foreground pattern using discrete steps */
|
|
set_solid_pattern (cr, x, FALSE, alpha);
|
|
cairo_rectangle (cr, 0, x, STEPS, 1);
|
|
cairo_fill (cr);
|
|
}
|
|
|
|
cairo_restore (cr);
|
|
}
|
|
|
|
static void
|
|
create_patterns (cairo_t *cr,
|
|
cairo_surface_t **bg,
|
|
cairo_surface_t **fg,
|
|
cairo_bool_t alpha)
|
|
{
|
|
cairo_t *bgcr, *fgcr;
|
|
|
|
*bg = cairo_surface_create_similar (cairo_get_target (cr),
|
|
CAIRO_CONTENT_COLOR_ALPHA,
|
|
SIZE * STEPS,
|
|
SIZE * STEPS);
|
|
*fg = cairo_surface_create_similar (cairo_get_target (cr),
|
|
CAIRO_CONTENT_COLOR_ALPHA,
|
|
SIZE * STEPS,
|
|
SIZE * STEPS);
|
|
|
|
bgcr = cairo_create (*bg);
|
|
fgcr = cairo_create (*fg);
|
|
|
|
do_blend_solid (bgcr, CAIRO_OPERATOR_DEST, alpha);
|
|
do_blend_solid (fgcr, CAIRO_OPERATOR_SOURCE, alpha);
|
|
|
|
cairo_destroy (bgcr);
|
|
cairo_destroy (fgcr);
|
|
}
|
|
|
|
/* expects a STEP*STEP pixel rectangle */
|
|
static void
|
|
do_blend (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha)
|
|
{
|
|
cairo_surface_t *bg, *fg;
|
|
|
|
create_patterns (cr, &bg, &fg, alpha);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
|
|
cairo_set_source_surface (cr, bg, 0, 0);
|
|
cairo_paint (cr);
|
|
|
|
cairo_set_operator (cr, op);
|
|
cairo_set_source_surface (cr, fg, 0, 0);
|
|
cairo_paint (cr);
|
|
|
|
cairo_surface_destroy (fg);
|
|
cairo_surface_destroy (bg);
|
|
}
|
|
|
|
static void
|
|
do_blend_mask (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha)
|
|
{
|
|
cairo_surface_t *bg, *fg;
|
|
|
|
create_patterns (cr, &bg, &fg, alpha);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
|
|
cairo_set_source_surface (cr, bg, 0, 0);
|
|
cairo_paint (cr);
|
|
|
|
cairo_set_operator (cr, op);
|
|
cairo_set_source_surface (cr, fg, 0, 0);
|
|
cairo_paint_with_alpha (cr, .5);
|
|
|
|
cairo_surface_destroy (fg);
|
|
cairo_surface_destroy (bg);
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw (cairo_t *cr, cairo_bool_t alpha,
|
|
void (*blend)(cairo_t *, cairo_operator_t, cairo_bool_t))
|
|
{
|
|
size_t i = 0;
|
|
cairo_operator_t op;
|
|
|
|
for (op = START_OPERATOR; op <= STOP_OPERATOR; op++, i++) {
|
|
cairo_save (cr);
|
|
cairo_translate (cr,
|
|
SIZE * (STEPS + 1) * (i % COUNT),
|
|
SIZE * (STEPS + 1) * (i / COUNT));
|
|
blend (cr, op, alpha);
|
|
cairo_restore (cr);
|
|
}
|
|
|
|
return CAIRO_TEST_SUCCESS;
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw_extended_blend (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, FALSE, do_blend);
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw_extended_blend_alpha (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, TRUE, do_blend);
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw_extended_blend_solid (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, FALSE, do_blend_solid);
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw_extended_blend_solid_alpha (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, TRUE, do_blend_solid);
|
|
}
|
|
|
|
static cairo_test_status_t
|
|
draw_extended_blend_mask (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, FALSE, do_blend_mask);
|
|
}
|
|
static cairo_test_status_t
|
|
draw_extended_blend_alpha_mask (cairo_t *cr, int width, int height)
|
|
{
|
|
return draw (cr, TRUE, do_blend_mask);
|
|
}
|
|
|
|
CAIRO_TEST (extended_blend,
|
|
"Tests extended blend modes without alpha",
|
|
"operator", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend)
|
|
|
|
CAIRO_TEST (extended_blend_alpha,
|
|
"Tests extended blend modes with alpha",
|
|
"operator", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend_alpha)
|
|
|
|
CAIRO_TEST (extended_blend_mask,
|
|
"Tests extended blend modes with an alpha mask",
|
|
"operator,mask", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend_mask)
|
|
CAIRO_TEST (extended_blend_alpha_mask,
|
|
"Tests extended blend modes with an alpha mask",
|
|
"operator,mask", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend_alpha_mask)
|
|
|
|
|
|
CAIRO_TEST (extended_blend_solid,
|
|
"Tests extended blend modes on solid patterns without alpha",
|
|
"operator", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend_solid)
|
|
|
|
CAIRO_TEST (extended_blend_solid_alpha,
|
|
"Tests extended blend modes on solid patterns with alpha",
|
|
"operator", /* keywords */
|
|
NULL, /* requirements */
|
|
FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE,
|
|
NULL, draw_extended_blend_solid_alpha)
|