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-rw-r--r--test/pdiff/args.c119
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diff --git a/test/pdiff/args.c b/test/pdiff/args.c
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+/*
+ Comapre Args
+ Copyright (C) 2006 Yangli Hector Yee
+
+ This program is free software; you can redistribute it and/or modify it under the terms of the
+ GNU General Public License as published by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with this program;
+ if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+*/
+
+#include "args.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const char* copyright =
+"PerceptualDiff version 1.0, Copyright (C) 2006 Yangli Hector Yee\n\
+PerceptualDiff comes with ABSOLUTELY NO WARRANTY;\n\
+This is free software, and you are welcome\n\
+to redistribute it under certain conditions;\n\
+See the GPL page for details: http://www.gnu.org/copyleft/gpl.html\n\n";
+
+static const char *usage =
+"PeceptualDiff image1.tif image2.tif\n\n\
+ Compares image1.tif and image2.tif using a perceptually based image metric\n\
+ Options:\n\
+\t-verbose : Turns on verbose mode\n\
+\t-fov deg : Field of view in degrees (0.1 to 89.9)\n\
+\t-threshold p : #pixels p below which differences are ignored\n\
+\t-gamma g : Value to convert rgb into linear space (default 2.2)\n\
+\t-luminance l : White luminance (default 100.0 cdm^-2)\n\
+\n\
+\n Note: Input files can also be in the PNG format\
+\n";
+
+void
+args_init (args_t *args)
+{
+ args->surface_a = NULL;
+ args->surface_b = NULL;
+ args->Verbose = false;
+ args->FieldOfView = 45.0f;
+ args->Gamma = 2.2f;
+ args->ThresholdPixels = 100;
+ args->Luminance = 100.0f;
+}
+
+void
+args_fini (args_t *args)
+{
+ cairo_surface_destroy (args->surface_a);
+ cairo_surface_destroy (args->surface_b);
+}
+
+bool
+args_parse (args_t *args, int argc, char **argv)
+{
+ int i;
+ if (argc < 3) {
+ fprintf (stderr, "%s", copyright);
+ fprintf (stderr, "%s", usage);
+ return false;
+ }
+ for (i = 0; i < argc; i++) {
+ if (i == 1) {
+ args->surface_a = cairo_image_surface_create_from_png (argv[1]);
+ if (cairo_surface_status (args->surface_a))
+ {
+ fprintf (stderr, "FAIL: Cannot open %s: %s\n",
+ argv[1], cairo_status_to_string (cairo_surface_status (args->surface_a)));
+ return false;
+ }
+ } else if (i == 2) {
+ args->surface_b = cairo_image_surface_create_from_png (argv[2]);
+ if (cairo_surface_status (args->surface_b))
+ {
+ fprintf (stderr, "FAIL: Cannot open %s: %s\n",
+ argv[2], cairo_status_to_string (cairo_surface_status (args->surface_b)));
+ return false;
+ }
+ } else {
+ if (strstr(argv[i], "-fov")) {
+ if (i + 1 < argc) {
+ args->FieldOfView = (float) atof(argv[i + 1]);
+ }
+ } else if (strstr(argv[i], "-verbose")) {
+ args->Verbose = true;
+ } else if (strstr(argv[i], "-threshold")) {
+ if (i + 1 < argc) {
+ args->ThresholdPixels = atoi(argv[i + 1]);
+ }
+ } else if (strstr(argv[i], "-gamma")) {
+ if (i + 1 < argc) {
+ args->Gamma = (float) atof(argv[i + 1]);
+ }
+ }else if (strstr(argv[i], "-luminance")) {
+ if (i + 1 < argc) {
+ args->Luminance = (float) atof(argv[i + 1]);
+ }
+ }
+ }
+ } /* i */
+ return true;
+}
+
+void
+args_print (args_t *args)
+{
+ printf("Field of view is %f degrees\n", args->FieldOfView);
+ printf("Threshold pixels is %d pixels\n", args->ThresholdPixels);
+ printf("The Gamma is %f\n", args->Gamma);
+ printf("The Display's luminance is %f candela per meter squared\n", args->Luminance);
+}