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-rw-r--r--libs/cairo-1.16.0/test/extended-blend.c253
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diff --git a/libs/cairo-1.16.0/test/extended-blend.c b/libs/cairo-1.16.0/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);
+
+ 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)
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