[test] Add ps2png check program using libspectre

Add a simple program to compliment pdf2png and svg2png.

configure.ac

@@ -357,6 +357,7 @@ if test "x$use_ps" = "xyes"; then
 fi
 
 AM_CONDITIONAL(CAIRO_CAN_TEST_PS_SURFACE, test "x$test_ps" = "xyes")
+AM_CONDITIONAL(BUILD_PS2PNG, test "x$any2ppm_ps" = "xyes")
 AC_SUBST(LIBSPECTRE_CFLAGS)
 AC_SUBST(LIBSPECTRE_LIBS)
 

test/Makefile.am

@@ -1094,6 +1094,14 @@ svg2png_LDFLAGS = $(CAIRO_TEST_UNDEFINED_LDFLAGS)
 svg2png_LDADD  = $(LDADD) $(LIBRSVG_LIBS)
 endif
 
+if BUILD_PS2PNG
+check_PROGRAMS += ps2png
+ps2png_CFLAGS = $(LIBSPECTRE_CFLAGS)
+# add LDADD, so ps2png uses "our" cairo
+ps2png_LDFLAGS = $(CAIRO_TEST_UNDEFINED_LDFLAGS)
+ps2png_LDADD  = $(LDADD) $(LIBSPECTRE_LIBS)
+endif
+
 EXTRA_PROGRAMS += $(TESTS) $(DISABLED_TESTS)
 
 # Do a funny transition of CAIRO_TEST_TARGET through TARGETS such that

test/ps2png.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright © 2008 Carlos Garcia Campos
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Carlos Garcia Campos <carlosgc@gnome.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <cairo.h>
+#include <libspectre/spectre.h>
+
+#define FAIL(msg)                                                        \
+    do { fprintf (stderr, "FAIL: %s\n", msg); exit (-1); } while (0)
+
+static const char *
+_spectre_render_page (const char *filename,
+		      const char *page_label,
+		      cairo_surface_t **surface_out)
+{
+    static const cairo_user_data_key_t key;
+
+    SpectreDocument *document;
+    SpectreStatus status;
+    int width, height, stride;
+    unsigned char *pixels;
+    cairo_surface_t *surface;
+
+    document = spectre_document_new ();
+    spectre_document_load (document, filename);
+    status = spectre_document_status (document);
+    if (status) {
+	spectre_document_free (document);
+	return spectre_status_to_string (status);
+    }
+
+    if (page_label) {
+	SpectrePage *page;
+	SpectreRenderContext *rc;
+
+	page = spectre_document_get_page_by_label (document, page_label);
+	spectre_document_free (document);
+	if (page == NULL)
+	    return "page not found";
+
+	spectre_page_get_size (page, &width, &height);
+	rc = spectre_render_context_new ();
+	spectre_render_context_set_page_size (rc, width, height);
+	spectre_page_render (page, rc, &pixels, &stride);
+	spectre_render_context_free (rc);
+	status = spectre_page_status (page);
+	spectre_page_free (page);
+	if (status) {
+	    free (pixels);
+	    return spectre_status_to_string (status);
+	}
+    } else {
+	spectre_document_get_page_size (document, &width, &height);
+	spectre_document_render (document, &pixels, &stride);
+	spectre_document_free (document);
+    }
+
+    surface = cairo_image_surface_create_for_data (pixels,
+						   CAIRO_FORMAT_RGB24,
+						   width, height,
+						   stride);
+    cairo_surface_set_user_data (surface, &key,
+				 pixels, (cairo_destroy_func_t) free);
+    *surface_out = surface;
+    return NULL;
+}
+
+int main
+(int argc, char *argv[])
+{
+    const char *err;
+    cairo_surface_t *surface = NULL; /* silence compiler warning */
+    cairo_status_t status;
+
+    if (argc < 3 || argc > 4)
+        FAIL ("usage: ps2png input_file.ps output_file.png [page]");
+
+    err = _spectre_render_page (argv[1], argv[3], &surface);
+    if (err != NULL)
+        FAIL (err);
+
+    status = cairo_surface_write_to_png (surface, argv[2]);
+    cairo_surface_destroy (surface);
+
+    if (status != CAIRO_STATUS_SUCCESS)
+        FAIL (cairo_status_to_string (status));
+
+    return 0;
+}