test/operator-clear.c

   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  * Authors: Kristian Høgsberg <krh@redhat.com>
  24  *          Owen Taylor <otaylor@redhat.com>
  25  */
  26
  27 #include <math.h>
  28 #include "cairo-test.h"
  29 #include <stdio.h>
  30
  31 #define WIDTH 16
  32 #define HEIGHT 16
  33 #define PAD 2
  34
  35 static void
  36 set_solid_pattern (cairo_t *cr, int x, int y)
  37 {
  38     cairo_set_source_rgb (cr, 1.0, 0, 0.0);
  39 }
  40
  41 static void
  42 set_gradient_pattern (cairo_t *cr, int x, int y)
  43 {
  44     cairo_pattern_t *pattern;
  45
  46     pattern = cairo_pattern_create_linear (x, y, x + WIDTH, y + HEIGHT);
  47     cairo_pattern_add_color_stop_rgba (pattern, 0.2, 1, 0, 0, 1);
  48     cairo_pattern_add_color_stop_rgba (pattern, 0.8, 1, 0, 0, 0.0);
  49     cairo_set_source (cr, pattern);
  50     cairo_pattern_destroy (pattern);
  51 }
  52
  53 static void
  54 draw_mask (cairo_t *cr, int x, int y)
  55 {
  56     cairo_surface_t *mask_surface;
  57     cairo_t *cr2;
  58
  59     double width = (int)(0.9 * WIDTH);
  60     double height = (int)(0.9 * HEIGHT);
  61     x += 0.05 * WIDTH;
  62     y += 0.05 * HEIGHT;
  63
  64     mask_surface = cairo_surface_create_similar (cairo_get_group_target (cr),
  65                                                  CAIRO_CONTENT_ALPHA,
  66                                                  width, height);
  67     cr2 = cairo_create (mask_surface);
  68     cairo_surface_destroy (mask_surface);
  69
  70     cairo_set_source_rgb (cr2, 1, 1, 1); /* white */
  71
  72     cairo_arc (cr2, 0.5 * width, 0.5 * height, 0.45 * height, 0, 2 * M_PI);
  73     cairo_fill (cr2);
  74
  75     cairo_mask_surface (cr, cairo_get_target (cr2), x, y);
  76     cairo_destroy (cr2);
  77 }
  78
  79 static void
  80 draw_glyphs (cairo_t *cr, int x, int y)
  81 {
  82     cairo_text_extents_t extents;
  83
  84     cairo_set_font_size (cr, 0.8 * HEIGHT);
  85
  86     cairo_text_extents (cr, "FG", &extents);
  87     cairo_move_to (cr,
  88                    x + floor ((WIDTH - extents.width) / 2 + 0.5) - extents.x_bearing,
  89                    y + floor ((HEIGHT - extents.height) / 2 + 0.5) - extents.y_bearing);
  90     cairo_show_text (cr, "FG");
  91 }
  92
  93 static void
  94 draw_polygon (cairo_t *cr, int x, int y)
  95 {
  96     double width = (int)(0.9 * WIDTH);
  97     double height = (int)(0.9 * HEIGHT);
  98     x += 0.05 * WIDTH;
  99     y += 0.05 * HEIGHT;
 100
 101     cairo_new_path (cr);
 102     cairo_move_to (cr, x, y);
 103     cairo_line_to (cr, x, y + height);
 104     cairo_line_to (cr, x + width / 2, y + 3 * height / 4);
 105     cairo_line_to (cr, x + width, y + height);
 106     cairo_line_to (cr, x + width, y);
 107     cairo_line_to (cr, x + width / 2, y + height / 4);
 108     cairo_close_path (cr);
 109     cairo_fill (cr);
 110 }
 111
 112 static void
 113 draw_rects (cairo_t *cr, int x, int y)
 114 {
 115     double block_width = (int)(0.33 * WIDTH + 0.5);
 116     double block_height = (int)(0.33 * HEIGHT + 0.5);
 117     int i, j;
 118
 119     for (i = 0; i < 3; i++)
 120         for (j = 0; j < 3; j++)
 121             if ((i + j) % 2 == 0)
 122                 cairo_rectangle (cr,
 123                                  x + block_width * i, y + block_height * j,
 124                                  block_width,         block_height);
 125
 126     cairo_fill (cr);
 127 }
 128
 129 static void (* const pattern_funcs[])(cairo_t *cr, int x, int y) = {
 130     set_solid_pattern,
 131     set_gradient_pattern,
 132 };
 133
 134 static void (* const draw_funcs[])(cairo_t *cr, int x, int y) = {
 135     draw_mask,
 136     draw_glyphs,
 137     draw_polygon,
 138     draw_rects
 139 };
 140
 141 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 142 #define IMAGE_WIDTH (ARRAY_SIZE (pattern_funcs) * (WIDTH + PAD) + PAD)
 143 #define IMAGE_HEIGHT (ARRAY_SIZE (draw_funcs) * (HEIGHT + PAD) + PAD)
 144
 145 static cairo_test_status_t
 146 draw (cairo_t *cr, int width, int height)
 147 {
 148     const cairo_test_context_t *ctx = cairo_test_get_context (cr);
 149     size_t i, j, x, y;
 150     cairo_pattern_t *pattern;
 151
 152     cairo_select_font_face (cr, "Bitstream Vera Sans",
 153                             CAIRO_FONT_SLANT_NORMAL,
 154                             CAIRO_FONT_WEIGHT_NORMAL);
 155
 156     for (j = 0; j < ARRAY_SIZE (draw_funcs); j++) {
 157         for (i = 0; i < ARRAY_SIZE (pattern_funcs); i++) {
 158             x = i * (WIDTH + PAD) + PAD;
 159             y = j * (HEIGHT + PAD) + PAD;
 160
 161             cairo_save (cr);
 162
 163             pattern = cairo_pattern_create_linear (x + WIDTH, y,
 164                                                    x,         y + HEIGHT);
 165             cairo_pattern_add_color_stop_rgba (pattern, 0.2,
 166                                                0.0, 0.0, 1.0, 1.0); /* Solid blue */
 167             cairo_pattern_add_color_stop_rgba (pattern, 0.8,
 168                                                0.0, 0.0, 1.0, 0.0); /* Transparent blue */
 169             cairo_set_source (cr, pattern);
 170             cairo_pattern_destroy (pattern);
 171
 172             cairo_rectangle (cr, x, y, WIDTH, HEIGHT);
 173             cairo_fill_preserve (cr);
 174             cairo_clip (cr);
 175
 176             cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
 177             pattern_funcs[i] (cr, x, y);
 178             draw_funcs[j] (cr, x, y);
 179             if (cairo_status (cr))
 180                 cairo_test_log (ctx, "%d %d HERE!\n", (int)i, (int)j);
 181
 182             cairo_restore (cr);
 183         }
 184     }
 185
 186     if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
 187         cairo_test_log (ctx, "%d %d .HERE!\n", (int)i, (int)j);
 188
 189     return CAIRO_TEST_SUCCESS;
 190 }
 191
 192 CAIRO_TEST (operator_clear,
 193             "Test of CAIRO_OPERATOR_CLEAR",
 194             "XFAIL=svg12 operator", /* keywords */
 195             NULL, /* requirements */
 196             IMAGE_WIDTH, IMAGE_HEIGHT,
 197             NULL, draw)