Grcov report - clip-operator.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 void

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

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    cairo_surface_t *mask_surface;

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    cairo_t *cr2;

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    double width = (int)(0.9 * WIDTH);

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    double height = (int)(0.9 * HEIGHT);

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    x += 0.05 * WIDTH;

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    y += 0.05 * HEIGHT;

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    mask_surface = cairo_surface_create_similar (cairo_get_group_target (cr),

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						 CAIRO_CONTENT_ALPHA,

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						 width, height);

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    cr2 = cairo_create (mask_surface);

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    cairo_surface_destroy (mask_surface);

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    cairo_save (cr2);

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    cairo_set_source_rgba (cr2, 0, 0, 0, 0); /* transparent */

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    cairo_set_operator (cr2, CAIRO_OPERATOR_SOURCE);

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    cairo_paint (cr2);

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    cairo_restore (cr2);

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    cairo_set_source_rgb (cr2, 1, 1, 1); /* white */

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    cairo_arc (cr2, 0.5 * width, 0.5 * height, 0.45 * height, 0, 2 * M_PI);

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    cairo_fill (cr2);

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    cairo_mask_surface (cr, cairo_get_target (cr2), x, y);

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    cairo_destroy (cr2);

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static void

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

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    cairo_text_extents_t extents;

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    cairo_set_font_size (cr, 0.8 * HEIGHT);

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    cairo_text_extents (cr, "FG", &extents);

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    cairo_move_to (cr,

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		   x + floor ((WIDTH - extents.width) / 2 + 0.5) - extents.x_bearing,

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		   y + floor ((HEIGHT - extents.height) / 2 + 0.5) - extents.y_bearing);

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    cairo_show_text (cr, "FG");

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static void

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

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    double width = (int)(0.9 * WIDTH);

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    double height = (int)(0.9 * HEIGHT);

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    x += 0.05 * WIDTH;

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    y += 0.05 * HEIGHT;

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

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    double block_width = (int)(0.33 * WIDTH + 0.5);

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    double block_height = (int)(0.33 * HEIGHT + 0.5);

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    int i, j;

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    for (i = 0; i < 3; i++)

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	for (j = 0; j < 3; j++)

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	    if ((i + j) % 2 == 0)

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		cairo_rectangle (cr,

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				 x + block_width * i, y + block_height * j,

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				 block_width,         block_height);

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    cairo_fill (cr);

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

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    draw_mask,

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    draw_glyphs,

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    draw_polygon,

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    draw_rects

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};

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#define N_OPERATORS (1 + CAIRO_OPERATOR_SATURATE - CAIRO_OPERATOR_CLEAR)

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#define IMAGE_WIDTH (N_OPERATORS * (WIDTH + PAD) + PAD)

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#define IMAGE_HEIGHT (ARRAY_LENGTH (draw_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 j, x, y;

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    cairo_operator_t op;

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    cairo_pattern_t *pattern;

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    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",

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			    CAIRO_FONT_SLANT_NORMAL,

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			    CAIRO_FONT_WEIGHT_NORMAL);

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    cairo_set_font_size (cr, 0.9 * HEIGHT);

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

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	for (op = CAIRO_OPERATOR_CLEAR; op < N_OPERATORS; op++) {

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

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	    y = j * (HEIGHT + PAD) + PAD;

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	    cairo_save (cr);

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	    pattern = cairo_pattern_create_linear (x + WIDTH, y,

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						   x,         y + HEIGHT);

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	    cairo_pattern_add_color_stop_rgba (pattern, 0.2,

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					       0.0, 0.0, 1.0, 1.0); /* Solid blue */

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	    cairo_pattern_add_color_stop_rgba (pattern, 0.8,

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					       0.0, 0.0, 1.0, 0.0); /* Transparent blue */

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	    cairo_set_source (cr, pattern);

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	    cairo_pattern_destroy (pattern);

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

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	    cairo_fill (cr);

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	    cairo_set_operator (cr, op);

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	    cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);

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	    cairo_move_to (cr, x, y);

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	    cairo_line_to (cr, x + WIDTH, y);

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	    cairo_line_to (cr, x, y + HEIGHT);

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	    cairo_clip (cr);

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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", op, (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", op, (int)j);

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (clip_operator,

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	    "Surface clipping with different operators",

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	    "clip", /* keywords */

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	    NULL, /* requirements */

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	    IMAGE_WIDTH, IMAGE_HEIGHT,

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	    NULL, draw)

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