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-rw-r--r--test/imagediff.c303
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diff --git a/test/imagediff.c b/test/imagediff.c
deleted file mode 100644
index 6ebbcfca7..000000000
--- a/test/imagediff.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/* imagediff - Compare two images
- *
- * Copyright © 2004 Richard D. Worth
- *
- * 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 Richard Worth
- * not be used in advertising or publicity pertaining to distribution
- * of the software without specific, written prior permission.
- * Richard Worth makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without express
- * or implied warranty.
- *
- * RICHARD WORTH DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
- * NO EVENT SHALL RICHARD WORTH 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: Richard D. Worth <richard@theworths.org> */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <errno.h>
-
-#include "buffer-diff.h"
-
-static void
-_xunlink (const char *pathname)
-{
- if (unlink (pathname) < 0 && errno != ENOENT) {
- fprintf (stderr, " Error: Cannot remove %s: %s\n",
- pathname, strerror (errno));
- exit (1);
- }
-}
-
-void
-cairo_test_logv (const cairo_test_context_t *ctx,
- const char *fmt, va_list va)
-{
- vfprintf (stderr, fmt, va);
-}
-
-void
-cairo_test_log (const cairo_test_context_t *ctx, const char *fmt, ...)
-{
- va_list va;
-
- va_start (va, fmt);
- vfprintf (stderr, fmt, va);
- va_end (va);
-}
-
-/* Flatten an ARGB surface by blending it over white. The resulting
- * surface, (still in ARGB32 format, but with only alpha==1.0
- * everywhere) is returned in the same surface pointer.
- *
- * The original surface will be destroyed.
- *
- * The (x,y) value specify an origin of interest for the original
- * image. The flattened image will be generated only from the box
- * extending from (x,y) to (width,height).
- */
-static void
-flatten_surface (cairo_surface_t **surface, int x, int y)
-{
- cairo_surface_t *flat;
- cairo_t *cr;
-
- flat = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
- cairo_image_surface_get_width (*surface) - x,
- cairo_image_surface_get_height (*surface) - y);
- cairo_surface_set_device_offset (flat, -x, -y);
-
- cr = cairo_create (flat);
- cairo_surface_destroy (flat);
-
- cairo_set_source_rgb (cr, 1, 1, 1);
- cairo_paint (cr);
-
- cairo_set_source_surface (cr, *surface, 0, 0);
- cairo_surface_destroy (*surface);
- cairo_paint (cr);
-
- *surface = cairo_surface_reference (cairo_get_target (cr));
- cairo_destroy (cr);
-}
-
-/* Given an image surface, create a new surface that has the same
- * contents as the sub-surface with its origin at x,y.
- *
- * The original surface will be destroyed.
- */
-static void
-extract_sub_surface (cairo_surface_t **surface, int x, int y)
-{
- cairo_surface_t *sub;
- cairo_t *cr;
-
- sub = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
- cairo_image_surface_get_width (*surface) - x,
- cairo_image_surface_get_height (*surface) - y);
-
- /* We don't use a device offset like flatten_surface. That's not
- * for any important reason, (the results should be
- * identical). This style just seemed more natural to me this
- * time, so I'm leaving both here so I can look at both to see
- * which I like better. */
- cr = cairo_create (sub);
- cairo_surface_destroy (sub);
-
- cairo_set_source_surface (cr, *surface, -x, -y);
- cairo_surface_destroy (*surface);
- cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
- cairo_paint (cr);
-
- *surface = cairo_surface_reference (cairo_get_target (cr));
- cairo_destroy (cr);
-}
-
-static cairo_status_t
-stdio_write_func (void *closure, const unsigned char *data, unsigned int length)
-{
- FILE *file = closure;
-
- if (fwrite (data, 1, length, file) != length)
- return CAIRO_STATUS_WRITE_ERROR;
-
- return CAIRO_STATUS_SUCCESS;
-}
-
-static cairo_status_t
-write_png (cairo_surface_t *surface, const char *filename)
-{
- cairo_status_t status;
- FILE *png_file;
-
- if (filename != NULL) {
- png_file = fopen (filename, "wb");
- if (png_file == NULL) {
- switch (errno) {
- case ENOMEM:
- return CAIRO_STATUS_NO_MEMORY;
- default:
- return CAIRO_STATUS_WRITE_ERROR;
- }
- }
- } else
- png_file = stdout;
-
- status = cairo_surface_write_to_png_stream (surface,
- stdio_write_func,
- png_file);
-
- if (png_file != stdout)
- fclose (png_file);
-
- return status;
-}
-
-static cairo_status_t
-png_diff (const char *filename_a,
- const char *filename_b,
- const char *filename_diff,
- int ax,
- int ay,
- int bx,
- int by,
- buffer_diff_result_t *result)
-{
- cairo_surface_t *surface_a;
- cairo_surface_t *surface_b;
- cairo_surface_t *surface_diff;
- cairo_status_t status;
-
- surface_a = cairo_image_surface_create_from_png (filename_a);
- status = cairo_surface_status (surface_a);
- if (status) {
- fprintf (stderr, "Error: Failed to create surface from %s: %s\n",
- filename_a, cairo_status_to_string (status));
- return status;
- }
-
- surface_b = cairo_image_surface_create_from_png (filename_b);
- status = cairo_surface_status (surface_b);
- if (status) {
- fprintf (stderr, "Error: Failed to create surface from %s: %s\n",
- filename_b, cairo_status_to_string (status));
- cairo_surface_destroy (surface_a);
- return status;
- }
-
- if (ax || ay) {
- extract_sub_surface (&surface_a, ax, ay);
- ax = ay = 0;
- }
-
- if (bx || by) {
- extract_sub_surface (&surface_b, bx, by);
- bx = by = 0;
- }
-
- status = cairo_surface_status (surface_a);
- if (status) {
- fprintf (stderr, "Error: Failed to extract surface from %s: %s\n",
- filename_a, cairo_status_to_string (status));
- cairo_surface_destroy (surface_a);
- cairo_surface_destroy (surface_b);
- return status;
- }
- status = cairo_surface_status (surface_b);
- if (status) {
- fprintf (stderr, "Error: Failed to extract surface from %s: %s\n",
- filename_b, cairo_status_to_string (status));
- cairo_surface_destroy (surface_a);
- cairo_surface_destroy (surface_b);
- return status;
- }
-
- surface_diff = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
- cairo_image_surface_get_width (surface_a),
- cairo_image_surface_get_height (surface_a));
- status = cairo_surface_status (surface_diff);
- if (status) {
- fprintf (stderr,
- "Error: Failed to allocate surface to hold differences\n");
- cairo_surface_destroy (surface_a);
- cairo_surface_destroy (surface_b);
- return CAIRO_STATUS_NO_MEMORY;
- }
-
- status = image_diff (NULL,
- surface_a, surface_b, surface_diff,
- result);
-
- if (filename_diff)
- _xunlink (filename_diff);
-
- if (status == CAIRO_STATUS_SUCCESS &&
- result->pixels_changed)
- {
- status = write_png (surface_diff, filename_diff);
- }
-
- cairo_surface_destroy (surface_a);
- cairo_surface_destroy (surface_b);
- cairo_surface_destroy (surface_diff);
-
- return status;
-}
-
-int
-main (int argc, char *argv[])
-{
- buffer_diff_result_t result;
- cairo_status_t status;
-
- unsigned int ax, ay, bx, by;
-
- if (argc != 3 && argc != 7) {
- fprintf (stderr, "Usage: %s image1.png image2.png [ax ay bx by]\n", argv[0]);
- fprintf (stderr, "Computes an output image designed to present a \"visual diff\" such that even\n");
- fprintf (stderr, "small errors in single pixels are readily apparent in the output.\n");
- fprintf (stderr, "The output image is written on stdout.\n");
- exit (1);
- }
-
- if (argc == 7) {
- ax = strtoul (argv[3], NULL, 0);
- ay = strtoul (argv[4], NULL, 0);
- bx = strtoul (argv[5], NULL, 0);
- by = strtoul (argv[6], NULL, 0);
- } else {
- ax = ay = bx = by = 0;
- }
-
- status = png_diff (argv[1], argv[2], NULL, ax, ay, bx, by, &result);
-
- if (status) {
- fprintf (stderr, "Error comparing images: %s\n",
- cairo_status_to_string (status));
- return 1;
- }
-
- if (result.pixels_changed)
- fprintf (stderr, "Total pixels changed: %d with a maximum channel difference of %d.\n",
- result.pixels_changed,
- result.max_diff);
-
- return (result.pixels_changed != 0);
-}
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