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-rw-r--r--test/extended-blend.c256
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diff --git a/test/extended-blend.c b/test/extended-blend.c
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--- a/test/extended-blend.c
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-/*
- * 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);
-
- /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */
- 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);
-
- /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */
- 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);
-
- /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */
- 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)
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 16:00:44 +0000