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/*
* Copyright © 2006, 2008 Red Hat, Inc.
* Copyright © 2021 Adrian Johnson
*
* 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.
* Contributor(s):
* Kristian Høgsberg <krh@redhat.com>
* Behdad Esfahbod <behdad@behdad.org>
*/
/* Test that user-fonts can handle color and non-color glyphs in the
* same font.
#include "cairo-test.h"
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#define BORDER 10
#define TEXT_SIZE 64
#define WIDTH (TEXT_SIZE * 11 + 2*BORDER)
#define HEIGHT (4*TEXT_SIZE + 5*BORDER)
#define TEXT "abcdefghij"
/* These characters will be drawn twice with a different foreground color */
#define FG_TEXT "acfh"
/* Uppercase draws the same text but forces the use of the non-color
* render callback */
#define TEXT_NO_COLOR "ABCDEFGHIJ"
#define FG_TEXT_NO_COLOR "ACFH"
#define TEXT_PATH "aabccdeffghhij"
static cairo_status_t
test_scaled_font_init (cairo_scaled_font_t *scaled_font,
cairo_t *cr,
cairo_font_extents_t *metrics)
{
metrics->ascent = .75;
metrics->descent = .25;
return CAIRO_STATUS_SUCCESS;
}
static void
render_glyph_solid (cairo_t *cr,
double width,
double height,
cairo_bool_t color,
cairo_scaled_font_t *scaled_font)
if (color)
cairo_set_source_rgba (cr, 0.7, 0.2, 0.1, 0.9);
cairo_rectangle (cr, 0, 0, width/2, height/2);
cairo_fill (cr);
if (color) {
if (scaled_font)
cairo_set_source (cr, cairo_user_scaled_font_get_foreground_marker (scaled_font));
else
cairo_set_source_rgba (cr, 0.2, 0.5, 0.3, 0.9);
cairo_rectangle (cr, width/4, height/4, width/2, height/2);
cairo_set_source_rgba (cr, 0.2, 0.3, 0.5, 0.9);
cairo_rectangle (cr, width/2, height/2, width/2, height/2);
render_glyph_linear (cairo_t *cr,
cairo_pattern_t *pat;
cairo_pattern_t *fg;
pat = cairo_pattern_create_linear (0.0, 0.0, width, height);
if (scaled_font) {
double r, g, b, a;
fg = cairo_user_scaled_font_get_foreground_source (scaled_font);
if (cairo_pattern_get_rgba (fg, &r, &g, &b, &a) != CAIRO_STATUS_SUCCESS) {
r = g = b = 0;
a = 1;
cairo_pattern_add_color_stop_rgba (pat, 0, r, g, b, a);
cairo_pattern_add_color_stop_rgb (pat, 1, 0, 0, 1);
} else {
cairo_pattern_add_color_stop_rgb (pat, 0, 1, 0.4, 0.2);
cairo_pattern_add_color_stop_rgb (pat, 0.5, 0.2, 1, 0.4);
cairo_pattern_add_color_stop_rgb (pat, 1, 0.2, 0.3, 1);
cairo_set_source (cr, pat);
cairo_rectangle (cr, 0, 0, width, height);
render_glyph_text (cairo_t *cr, double width, double height, cairo_bool_t color)
cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 0.5);
cairo_set_source_rgb (cr, 0.5, 0.7, 0);
cairo_move_to (cr, width*0.1, height/2);
cairo_show_text (cr, "a");
cairo_set_source_rgb (cr, 0, 0.5, 0.7);
cairo_move_to (cr, width*0.4, height*0.9);
cairo_show_text (cr, "z");
test_scaled_font_render_glyph_common (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_text_extents_t *metrics,
cairo_bool_t color)
double width = 0.5;
double height = 0.8;
metrics->x_advance = 0.75;
cairo_translate (cr, 0.125, -0.6);
switch (glyph) {
case 'a':
render_glyph_solid (cr, width, height, color, scaled_font);
break;
case 'b':
render_glyph_solid (cr, width, height, color, NULL);
case 'c':
render_glyph_linear (cr, width, height, color, scaled_font);
case 'd':
render_glyph_linear (cr, width, height, color, NULL);
case 'e':
render_glyph_text (cr, width, height, color);
case 'f':
cairo_push_group (cr);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
case 'g':
case 'h':
case 'i':
case 'j':
test_scaled_font_render_color_glyph_callback (cairo_scaled_font_t *scaled_font,
cairo_text_extents_t *metrics)
if (isupper(glyph))
return CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED;
return test_scaled_font_render_glyph_common (scaled_font, glyph, cr, metrics, TRUE);
test_scaled_font_render_glyph_callback (cairo_scaled_font_t *scaled_font,
int c = glyph;
if (isupper(c))
c = tolower(c);
return test_scaled_font_render_glyph_common (scaled_font, c, cr, metrics, FALSE);
_user_font_face_create (cairo_font_face_t **out)
cairo_font_face_t *user_font_face;
user_font_face = cairo_user_font_face_create ();
cairo_user_font_face_set_init_func (user_font_face, test_scaled_font_init);
cairo_user_font_face_set_render_color_glyph_func (user_font_face,
test_scaled_font_render_color_glyph_callback);
cairo_user_font_face_set_render_glyph_func (user_font_face,
test_scaled_font_render_glyph_callback);
*out = user_font_face;
/* Any text characters that are in fg_text will be drawn with a different color */
draw_line (cairo_t *cr, const char *text, const char *fg_text)
char buf[10];
for (unsigned i = 0; i < strlen(text); i++) {
buf[0] = text[i];
buf[1] = 0;
if (strchr (fg_text, text[i])) {
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_show_text (cr, buf);
cairo_set_source_rgb (cr, 0, 1, 0);
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
cairo_font_face_t *font_face;
const char text[] = TEXT;
cairo_font_extents_t font_extents;
cairo_text_extents_t extents;
cairo_status_t status;
cairo_font_options_t *font_options;
cairo_set_source_rgb (cr, 1, 1, 1);
status = _user_font_face_create (&font_face);
if (status) {
return cairo_test_status_from_status (cairo_test_get_context (cr),
status);
cairo_set_font_face (cr, font_face);
cairo_font_face_destroy (font_face);
cairo_set_font_size (cr, TEXT_SIZE);
cairo_font_extents (cr, &font_extents);
cairo_text_extents (cr, text, &extents);
/* logical boundaries in red */
cairo_move_to (cr, 0, BORDER);
cairo_rel_line_to (cr, WIDTH, 0);
cairo_move_to (cr, 0, BORDER + font_extents.ascent);
cairo_move_to (cr, 0, BORDER + font_extents.ascent + font_extents.descent);
cairo_move_to (cr, BORDER, 0);
cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE);
cairo_move_to (cr, BORDER + extents.x_advance, 0);
cairo_set_line_width (cr, 2);
cairo_stroke (cr);
/* ink boundaries in green */
cairo_rectangle (cr,
BORDER + extents.x_bearing, BORDER + font_extents.ascent + extents.y_bearing,
extents.width, extents.height);
/* Line 1: text in color */
cairo_move_to (cr, BORDER, BORDER + font_extents.ascent);
draw_line (cr, TEXT, FG_TEXT);
/* Line 2: text in non-color (color render callback returns
* CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED.
cairo_move_to (cr, BORDER, BORDER + font_extents.height + 1*BORDER + font_extents.ascent);
draw_line (cr, TEXT_NO_COLOR, FG_TEXT_NO_COLOR);
/* Line 3: Filled version of color text in blue */
cairo_move_to (cr, BORDER, BORDER + 2*font_extents.height + 2*BORDER + font_extents.ascent);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_text_path (cr, TEXT_PATH);
/* Line 4: color glyphs with CAIRO_COLOR_MODE_NO_COLOR font option. */
font_options = cairo_font_options_create ();
cairo_get_font_options (cr, font_options);
cairo_font_options_set_color_mode (font_options, CAIRO_COLOR_MODE_NO_COLOR);
cairo_set_font_options (cr, font_options);
cairo_font_options_destroy (font_options);
cairo_move_to (cr, BORDER, BORDER + 3*font_extents.height + 3*BORDER + font_extents.ascent);
return CAIRO_TEST_SUCCESS;
CAIRO_TEST (user_font_color,
"Tests user font color feature",
"font, user-font", /* keywords */
"cairo >= 1.17.4", /* requirements */
WIDTH, HEIGHT,
NULL, draw)