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/*
* 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 = NULL;
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;
}
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