1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Copyright © 2006 Red Hat, Inc.
*
* 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.
*
* Author: Carl D. Worth <cworth@cworth.org>
*/
#include <stdio.h>
#include <cairo.h>
#include <cairo-pdf.h>
#include <cairo-pdf-test.h>
#include <cairo-ps.h>
#include <cairo-ps-test.h>
#include <cairo-svg.h>
#include <cairo-svg-test.h>
#include "cairo-test.h"
/* This test exists to test cairo_surface_set_fallback_resolution
*/
#define INCHES_TO_POINTS(in) ((in) * 72.0)
#define SIZE INCHES_TO_POINTS(1)
static void
draw_with_ppi (cairo_t *cr, double width, double height, double ppi)
{
char message[80];
cairo_save (cr);
cairo_new_path (cr);
cairo_set_line_width (cr, .05 * SIZE / 2.0);
cairo_arc (cr, SIZE / 2.0, SIZE / 2.0,
0.75 * SIZE / 2.0,
0, 2.0 * M_PI);
cairo_stroke (cr);
cairo_arc (cr, SIZE / 2.0, SIZE / 2.0,
0.6 * SIZE / 2.0,
0, 2.0 * M_PI);
cairo_fill (cr);
cairo_move_to (cr, .4 * SIZE/2.0, SIZE/2.0);
sprintf (message, "Fallback PPI: %g", ppi);
cairo_set_source_rgb (cr, 1, 1, 1); /* white */
cairo_set_font_size (cr, .1 * SIZE / 2.0);
cairo_show_text (cr, message);
cairo_restore (cr);
}
#define NUM_BACKENDS 3
typedef enum {
PDF, PS, SVG
} backend_t;
static const char *backend_filename[NUM_BACKENDS] = {
"fallback-resolution.pdf",
"fallback-resolution.ps",
"fallback-resolution.svg"
};
int
main (void)
{
cairo_surface_t *surface;
cairo_t *cr;
cairo_status_t status;
double ppi[] = { 600., 300., 150., 75., 37.5 };
backend_t backend;
int page, num_pages;
num_pages = sizeof (ppi) / sizeof (ppi[0]);
cairo_test_init ("fallback-resolution");
for (backend=0; backend < NUM_BACKENDS; backend++) {
/* Create backend-specific surface and force image fallbacks. */
switch (backend) {
case PDF:
surface = cairo_pdf_surface_create (backend_filename[backend],
SIZE, SIZE);
_cairo_pdf_test_force_fallbacks ();
break;
case PS:
surface = cairo_ps_surface_create (backend_filename[backend],
SIZE, SIZE);
_cairo_ps_test_force_fallbacks ();
break;
case SVG:
surface = cairo_svg_surface_create (backend_filename[backend],
SIZE, SIZE * num_pages);
_cairo_svg_test_force_fallbacks ();
break;
}
cr = cairo_create (surface);
for (page = 0; page < num_pages; page++)
{
cairo_surface_set_fallback_resolution (surface, ppi[page], ppi[page]);
draw_with_ppi (cr, SIZE, SIZE, ppi[page]);
/* Backend-specific means of "advancing a page" */
switch (backend) {
case PDF:
case PS:
cairo_show_page (cr);
break;
case SVG:
/* Since the SVG backend doesn't natively support multiple
* pages, we just move further down for each logical
* page, then finally do a show_page at the end. */
if (page < num_pages - 1) {
cairo_translate (cr, 0, SIZE);
} else {
/* XXX: The goal of this test is to show the
* effect of several different fallback
* resolutions in a single output document. But
* since fallback_resolution only takes effect at
* the time of show_page, we only get once for the
* SVG backend. I'm just re-setting the first one
* here so we actually get legible output.
*
* To fix this properly we'll need some sort of
* multi-page support in the SVG backend I think.
*/
cairo_surface_set_fallback_resolution (surface, ppi[0], ppi[0]);
cairo_show_page (cr);
}
break;
}
}
status = cairo_status (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
if (status) {
cairo_test_log ("Failed to create pdf surface for file %s: %s\n",
backend_filename[backend],
cairo_status_to_string (status));
return CAIRO_TEST_FAILURE;
}
printf ("fallback-resolution: Please check %s to ensure it looks correct.\n",
backend_filename[backend]);
}
return CAIRO_TEST_SUCCESS;
}
|
