Grcov report - trap-clip.c

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/*

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 * Copyright © 2005 Red Hat, Inc.

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 * Permission to use, copy, modify, distribute, and sell this software

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 * and its documentation for any purpose is hereby granted without

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 * fee, provided that the above copyright notice appear in all copies

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 * and that both that copyright notice and this permission notice

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 * appear in supporting documentation, and that the name of

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 * Red Hat, Inc. not be used in advertising or publicity pertaining to

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 * distribution of the software without specific, written prior

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 * permission. Red Hat, Inc. makes no representations about the

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 * suitability of this software for any purpose.  It is provided "as

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 * is" without express or implied warranty.

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 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

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 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

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 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,

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 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER

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 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

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 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR

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 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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 * Author: Kristian Høgsberg <krh@redhat.com>

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*/

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#include "cairo-test.h"

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#include <math.h>

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#include <stdio.h>

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#define WIDTH 16

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#define HEIGHT 16

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#define PAD 2

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static const char *png_filename = "romedalen.png";

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static cairo_surface_t *image;

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static void

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set_solid_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)

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    cairo_set_source_rgb (cr, 0, 0, 0.6);

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static void

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set_translucent_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)

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    cairo_set_source_rgba (cr, 0, 0, 0.6, 0.5);

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static void

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set_gradient_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)

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    cairo_pattern_t *pattern;

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    pattern =

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	cairo_pattern_create_linear (x, y, x + WIDTH, y + HEIGHT);

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    cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 1, 1, 1);

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    cairo_pattern_add_color_stop_rgba (pattern, 1, 0, 0, 0.4, 1);

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    cairo_set_source (cr, pattern);

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    cairo_pattern_destroy (pattern);

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static void

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set_image_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)

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    cairo_pattern_t *pattern;

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    if (image == NULL || cairo_surface_status (image)) {

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3

	cairo_surface_destroy (image);

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	image = cairo_test_create_surface_from_png (ctx, png_filename);

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    pattern = cairo_pattern_create_for_surface (image);

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    cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);

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    cairo_set_source (cr, pattern);

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    cairo_pattern_destroy (pattern);

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static void

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draw_rect (cairo_t *cr, int x, int y)

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    cairo_new_path (cr);

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    cairo_rectangle (cr, x, y, WIDTH, HEIGHT);

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    cairo_fill (cr);

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static void

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draw_rects (cairo_t *cr, int x, int y)

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    int width = WIDTH / 3;

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    int height = HEIGHT / 2;

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    cairo_new_path (cr);

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    cairo_rectangle (cr, x, y, width, height);

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    cairo_rectangle (cr, x + width, y + height, width, height);

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    cairo_rectangle (cr, x + 2 * width, y, width, height);

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    cairo_fill (cr);

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static void

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draw_polygon (cairo_t *cr, int x, int y)

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    cairo_new_path (cr);

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    cairo_move_to (cr, x, y);

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    cairo_line_to (cr, x, y + HEIGHT);

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    cairo_line_to (cr, x + WIDTH / 2, y + 3 * HEIGHT / 4);

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    cairo_line_to (cr, x + WIDTH, y + HEIGHT);

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    cairo_line_to (cr, x + WIDTH, y);

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    cairo_line_to (cr, x + WIDTH / 2, y + HEIGHT / 4);

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    cairo_close_path (cr);

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    cairo_fill (cr);

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static void

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clip_none (cairo_t *cr, int x, int y)

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static void

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clip_rect (cairo_t *cr, int x, int y)

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    cairo_new_path (cr);

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    cairo_rectangle (cr, x + (int)WIDTH / 6, y + (int)HEIGHT / 6,

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		     4 * ((int)WIDTH  / 6), 4 * ((int)WIDTH / 6));

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    cairo_clip (cr);

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    cairo_new_path (cr);

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static void

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clip_rects (cairo_t *cr, int x, int y)

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    int height = HEIGHT / 3;

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    cairo_new_path (cr);

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    cairo_rectangle (cr, x, y, WIDTH, height);

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    cairo_rectangle (cr, x, y + 2 * height, WIDTH, height);

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    cairo_clip (cr);

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    cairo_new_path (cr);

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static void

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clip_circle (cairo_t *cr, int x, int y)

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    cairo_new_path (cr);

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    cairo_arc (cr, x + WIDTH / 2, y + HEIGHT / 2,

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	       WIDTH / 3, 0, 2 * M_PI);

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    cairo_clip (cr);

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    cairo_new_path (cr);

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static void (* const pattern_funcs[])(const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) = {

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    set_solid_pattern,

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    set_translucent_pattern,

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    set_gradient_pattern,

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    set_image_pattern,

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};

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static void (* const draw_funcs[])(cairo_t *cr, int x, int y) = {

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    draw_rect,

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    draw_rects,

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    draw_polygon,

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};

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static void (* const clip_funcs[])(cairo_t *cr, int x, int y) = {

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    clip_none,

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    clip_rect,

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    clip_rects,

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    clip_circle,

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};

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#define IMAGE_WIDTH (ARRAY_LENGTH (pattern_funcs) * (WIDTH + PAD) + PAD)

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#define IMAGE_HEIGHT (ARRAY_LENGTH (draw_funcs) * ARRAY_LENGTH (clip_funcs) * (HEIGHT + PAD) + PAD)

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static cairo_test_status_t

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draw (cairo_t *cr, int width, int height)

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    const cairo_test_context_t *ctx = cairo_test_get_context (cr);

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    size_t i, j, k, x, y;

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    for (k = 0; k < ARRAY_LENGTH (clip_funcs); k++) {

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	for (j = 0; j < ARRAY_LENGTH (draw_funcs); j++) {

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	    for (i = 0; i < ARRAY_LENGTH (pattern_funcs); i++) {

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		x = i * (WIDTH + PAD) + PAD;

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		y = (ARRAY_LENGTH (draw_funcs) * k + j) * (HEIGHT + PAD) + PAD;

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		cairo_save (cr);

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		cairo_move_to (cr, x, y);

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		clip_funcs[k] (cr, x, y);

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		pattern_funcs[i] (ctx, cr, x, y);

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		draw_funcs[j] (cr, x, y);

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		if (cairo_status (cr))

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		    cairo_test_log (ctx, "%d %d HERE!\n", (int)i, (int)j);

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		cairo_restore (cr);

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    if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)

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	cairo_test_log (ctx, "%d %d .HERE!\n", (int)i, (int)j);

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    cairo_surface_destroy (image);

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    image = NULL;

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    return CAIRO_TEST_SUCCESS;

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1

CAIRO_TEST (trap_clip,

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	    "Trapezoid clipping",

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	    "clip, trap", /* keywords */

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	    NULL, /* requirements */

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	    IMAGE_WIDTH, IMAGE_HEIGHT,

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	    NULL, draw)