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/*
* Copyright © 2005 Red Hat, Inc.
*
* 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: Kristian Høgsberg <krh@redhat.com>
* Owen Taylor <otaylor@redhat.com>
*/
#include "cairo-test.h"
#include <math.h>
#include <stdio.h>
#define WIDTH 16
#define HEIGHT 16
#define PAD 2
static void
draw_mask (cairo_t *cr, int x, int y)
{
cairo_surface_t *mask_surface;
cairo_t *cr2;
double width = (int)(0.9 * WIDTH);
double height = (int)(0.9 * HEIGHT);
x += 0.05 * WIDTH;
y += 0.05 * HEIGHT;
mask_surface = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_ALPHA,
width, height);
cr2 = cairo_create (mask_surface);
cairo_surface_destroy (mask_surface);
cairo_save (cr2);
cairo_set_source_rgba (cr2, 0, 0, 0, 0); /* transparent */
cairo_set_operator (cr2, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr2);
cairo_restore (cr2);
cairo_set_source_rgb (cr2, 1, 1, 1); /* white */
cairo_arc (cr2, 0.5 * width, 0.5 * height, 0.45 * height, 0, 2 * M_PI);
cairo_fill (cr2);
cairo_mask_surface (cr, cairo_get_target (cr2), x, y);
cairo_destroy (cr2);
}
static void
draw_glyphs (cairo_t *cr, int x, int y)
{
cairo_text_extents_t extents;
cairo_set_font_size (cr, 0.8 * HEIGHT);
cairo_text_extents (cr, "FG", &extents);
cairo_move_to (cr,
x + floor ((WIDTH - extents.width) / 2 + 0.5) - extents.x_bearing,
y + floor ((HEIGHT - extents.height) / 2 + 0.5) - extents.y_bearing);
cairo_show_text (cr, "FG");
}
static void
draw_polygon (cairo_t *cr, int x, int y)
{
double width = (int)(0.9 * WIDTH);
double height = (int)(0.9 * HEIGHT);
x += 0.05 * WIDTH;
y += 0.05 * HEIGHT;
cairo_new_path (cr);
cairo_move_to (cr, x, y);
cairo_line_to (cr, x, y + height);
cairo_line_to (cr, x + width / 2, y + 3 * height / 4);
cairo_line_to (cr, x + width, y + height);
cairo_line_to (cr, x + width, y);
cairo_line_to (cr, x + width / 2, y + height / 4);
cairo_close_path (cr);
cairo_fill (cr);
}
static void
draw_rects (cairo_t *cr, int x, int y)
{
double block_width = (int)(0.33 * WIDTH + 0.5);
double block_height = (int)(0.33 * HEIGHT + 0.5);
int i, j;
for (i = 0; i < 3; i++)
for (j = 0; j < 3; j++)
if ((i + j) % 2 == 0)
cairo_rectangle (cr,
x + block_width * i, y + block_height * j,
block_width, block_height);
cairo_fill (cr);
}
static void (*const draw_funcs[])(cairo_t *cr, int x, int y) = {
draw_mask,
draw_glyphs,
draw_polygon,
draw_rects
};
static cairo_operator_t operators[] = {
CAIRO_OPERATOR_IN, CAIRO_OPERATOR_OUT,
CAIRO_OPERATOR_DEST_IN, CAIRO_OPERATOR_DEST_ATOP
};
#define IMAGE_WIDTH (ARRAY_LENGTH (operators) * (WIDTH + PAD) + PAD)
#define IMAGE_HEIGHT (ARRAY_LENGTH (draw_funcs) * (HEIGHT + PAD) + PAD)
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
size_t i, j, x, y;
cairo_pattern_t *pattern;
cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
for (j = 0; j < ARRAY_LENGTH (draw_funcs); j++) {
for (i = 0; i < ARRAY_LENGTH (operators); i++) {
x = i * (WIDTH + PAD) + PAD;
y = j * (HEIGHT + PAD) + PAD;
cairo_save (cr);
pattern = cairo_pattern_create_linear (x + WIDTH, y,
x, y + HEIGHT);
cairo_pattern_add_color_stop_rgba (pattern, 0.2,
0.0, 0.0, 1.0, 1.0); /* Solid blue */
cairo_pattern_add_color_stop_rgba (pattern, 0.8,
0.0, 0.0, 1.0, 0.0); /* Transparent blue */
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_rectangle (cr, x, y, WIDTH, HEIGHT);
cairo_fill_preserve (cr);
cairo_clip (cr);
cairo_set_operator (cr, operators[i]);
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
draw_funcs[j] (cr, x, y);
if (cairo_status (cr))
cairo_test_log (ctx, "%d %d HERE!\n", (int)i, (int)j);
cairo_restore (cr);
}
}
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
cairo_test_log (ctx, "%d %d .HERE!\n", (int)i, (int)j);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (unbounded_operator,
"Operators with an effect for transparent source/mask",
"operator", /* keywords */
NULL, /* requirements */
IMAGE_WIDTH, IMAGE_HEIGHT,
NULL, draw)
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