1 /*
2 * Copyright © 2005 Red Hat, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software
5 * and its documentation for any purpose is hereby granted without
6 * fee, provided that the above copyright notice appear in all copies
7 * and that both that copyright notice and this permission notice
8 * appear in supporting documentation, and that the name of
9 * Red Hat, Inc. not be used in advertising or publicity pertaining to
10 * distribution of the software without specific, written prior
11 * permission. Red Hat, Inc. makes no representations about the
12 * suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
14 *
15 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
16 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
18 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
19 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
21 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 *
23 * Author: Kristian Høgsberg <krh@redhat.com>
24 */
25
26 #include "cairo-test.h"
27 #include <math.h>
28 #include <stdio.h>
29
30 #define WIDTH 16
31 #define HEIGHT 16
32 #define PAD 2
33
34 static void
draw_mask(cairo_t * cr,int x,int y)35 draw_mask (cairo_t *cr, int x, int y)
36 {
37 cairo_surface_t *mask_surface;
38 cairo_t *cr2;
39
40 double width = (int)(0.9 * WIDTH);
41 double height = (int)(0.9 * HEIGHT);
42 x += 0.05 * WIDTH;
43 y += 0.05 * HEIGHT;
44
45 mask_surface = cairo_surface_create_similar (cairo_get_group_target (cr),
46 CAIRO_CONTENT_ALPHA,
47 width, height);
48 cr2 = cairo_create (mask_surface);
49 cairo_surface_destroy (mask_surface);
50
51 cairo_save (cr2);
52 cairo_set_source_rgba (cr2, 0, 0, 0, 0); /* transparent */
53 cairo_set_operator (cr2, CAIRO_OPERATOR_SOURCE);
54 cairo_paint (cr2);
55 cairo_restore (cr2);
56
57 cairo_set_source_rgb (cr2, 1, 1, 1); /* white */
58
59 cairo_arc (cr2, 0.5 * width, 0.5 * height, 0.45 * height, 0, 2 * M_PI);
60 cairo_fill (cr2);
61
62 cairo_mask_surface (cr, cairo_get_target (cr2), x, y);
63 cairo_destroy (cr2);
64 }
65
66 static void
draw_glyphs(cairo_t * cr,int x,int y)67 draw_glyphs (cairo_t *cr, int x, int y)
68 {
69 cairo_text_extents_t extents;
70
71 cairo_set_font_size (cr, 0.8 * HEIGHT);
72
73 cairo_text_extents (cr, "FG", &extents);
74 cairo_move_to (cr,
75 x + floor ((WIDTH - extents.width) / 2 + 0.5) - extents.x_bearing,
76 y + floor ((HEIGHT - extents.height) / 2 + 0.5) - extents.y_bearing);
77 cairo_show_text (cr, "FG");
78 }
79
80 static void
draw_polygon(cairo_t * cr,int x,int y)81 draw_polygon (cairo_t *cr, int x, int y)
82 {
83 double width = (int)(0.9 * WIDTH);
84 double height = (int)(0.9 * HEIGHT);
85 x += 0.05 * WIDTH;
86 y += 0.05 * HEIGHT;
87
88 cairo_new_path (cr);
89 cairo_move_to (cr, x, y);
90 cairo_line_to (cr, x, y + height);
91 cairo_line_to (cr, x + width / 2, y + 3 * height / 4);
92 cairo_line_to (cr, x + width, y + height);
93 cairo_line_to (cr, x + width, y);
94 cairo_line_to (cr, x + width / 2, y + height / 4);
95 cairo_close_path (cr);
96 cairo_fill (cr);
97 }
98
99 static void
draw_rects(cairo_t * cr,int x,int y)100 draw_rects (cairo_t *cr, int x, int y)
101 {
102 double block_width = (int)(0.33 * WIDTH + 0.5);
103 double block_height = (int)(0.33 * HEIGHT + 0.5);
104 int i, j;
105
106 for (i = 0; i < 3; i++)
107 for (j = 0; j < 3; j++)
108 if ((i + j) % 2 == 0)
109 cairo_rectangle (cr,
110 x + block_width * i, y + block_height * j,
111 block_width, block_height);
112
113 cairo_fill (cr);
114 }
115
116 static void (* const draw_funcs[])(cairo_t *cr, int x, int y) = {
117 draw_mask,
118 draw_glyphs,
119 draw_polygon,
120 draw_rects
121 };
122
123 #define N_OPERATORS (1 + CAIRO_OPERATOR_SATURATE - CAIRO_OPERATOR_CLEAR)
124
125 #define IMAGE_WIDTH (N_OPERATORS * (WIDTH + PAD) + PAD)
126 #define IMAGE_HEIGHT (ARRAY_LENGTH (draw_funcs) * (HEIGHT + PAD) + PAD)
127
128 static cairo_test_status_t
draw(cairo_t * cr,int width,int height)129 draw (cairo_t *cr, int width, int height)
130 {
131 const cairo_test_context_t *ctx = cairo_test_get_context (cr);
132 size_t j, x, y;
133 cairo_operator_t op;
134 cairo_pattern_t *pattern;
135
136 cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
137 CAIRO_FONT_SLANT_NORMAL,
138 CAIRO_FONT_WEIGHT_NORMAL);
139 cairo_set_font_size (cr, 0.9 * HEIGHT);
140
141 for (j = 0; j < ARRAY_LENGTH (draw_funcs); j++) {
142 for (op = CAIRO_OPERATOR_CLEAR; op < N_OPERATORS; op++) {
143 x = op * (WIDTH + PAD) + PAD;
144 y = j * (HEIGHT + PAD) + PAD;
145
146 cairo_save (cr);
147
148 pattern = cairo_pattern_create_linear (x + WIDTH, y,
149 x, y + HEIGHT);
150 cairo_pattern_add_color_stop_rgba (pattern, 0.2,
151 0.0, 0.0, 1.0, 1.0); /* Solid blue */
152 cairo_pattern_add_color_stop_rgba (pattern, 0.8,
153 0.0, 0.0, 1.0, 0.0); /* Transparent blue */
154 cairo_set_source (cr, pattern);
155 cairo_pattern_destroy (pattern);
156
157 cairo_rectangle (cr, x, y, WIDTH, HEIGHT);
158 cairo_fill (cr);
159
160 cairo_set_operator (cr, op);
161 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
162
163 cairo_move_to (cr, x, y);
164 cairo_line_to (cr, x + WIDTH, y);
165 cairo_line_to (cr, x, y + HEIGHT);
166 cairo_clip (cr);
167
168 draw_funcs[j] (cr, x, y);
169 if (cairo_status (cr))
170 cairo_test_log (ctx, "%d %d HERE!\n", op, (int)j);
171
172 cairo_restore (cr);
173 }
174 }
175
176 if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
177 cairo_test_log (ctx, "%d %d .HERE!\n", op, (int)j);
178
179 return CAIRO_TEST_SUCCESS;
180 }
181
182 CAIRO_TEST (clip_operator,
183 "Surface clipping with different operators",
184 "clip", /* keywords */
185 NULL, /* requirements */
186 IMAGE_WIDTH, IMAGE_HEIGHT,
187 NULL, draw)
188
189