add cairo

1 files changed, 517 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/fallback-resolution.c b/libs/cairo-1.16.0/test/fallback-resolution.c
new file mode 100644
index 0000000..306a570
--- /dev/null
+++ b/libs/cairo-1.16.0/test/fallback-resolution.c
@@ -0,0 +1,517 @@
+/*
+ * Copyright © 2006 Red Hat, Inc.
+ * Copyright © 2008 Chris Wilson
+ *
+ * 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>
+ *         Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <cairo.h>
+
+#if CAIRO_HAS_PDF_SURFACE
+#include <cairo-pdf.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#include <errno.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#include "cairo-test.h"
+#include "buffer-diff.h"
+
+/* This test exists to test cairo_surface_set_fallback_resolution
+ *
+ * <behdad> one more thing.
+ *          if you can somehow incorporate cairo_show_page stuff in the
+ *          test suite.  such that fallback-resolution can actually be
+ *          automated..
+ *          if we could get a callback on surface when that function is
+ *          called, we could do cool stuff like making other backends
+ *          draw a long strip of images, one for each page...
+ */
+
+#define INCHES_TO_POINTS(in) ((in) * 72.0)
+#define SIZE INCHES_TO_POINTS(2)
+
+/* cairo_set_tolerance() is not respected by the PS/PDF backends currently */
+#define SET_TOLERANCE 0
+
+#define GENERATE_REFERENCE 0
+
+static void
+draw (cairo_t *cr, double width, double height)
+{
+    const char *text = "cairo";
+    cairo_text_extents_t extents;
+    const double dash[2] = { 8, 16 };
+    cairo_pattern_t *pattern;
+
+    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,
+	       0.875 * SIZE / 2.0,
+	       0, 2.0 * M_PI);
+    cairo_stroke (cr);
+
+    /* use dashes to demonstrate bugs:
+     *  https://bugs.freedesktop.org/show_bug.cgi?id=9189
+     *  https://bugs.freedesktop.org/show_bug.cgi?id=17223
+     */
+    cairo_save (cr);
+    cairo_set_dash (cr, dash, 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_restore (cr);
+
+    cairo_save (cr);
+    cairo_rectangle (cr, 0, 0, SIZE/2, SIZE);
+    cairo_clip (cr);
+    cairo_arc (cr, SIZE / 2.0, SIZE / 2.0,
+	       0.6 * SIZE / 2.0,
+	       0, 2.0 * M_PI);
+    cairo_fill (cr);
+    cairo_restore (cr);
+
+    /* use a pattern to exercise bug:
+     *   https://bugs.launchpad.net/inkscape/+bug/234546
+     */
+    cairo_save (cr);
+    cairo_rectangle (cr, SIZE/2, 0, SIZE/2, SIZE);
+    cairo_clip (cr);
+    pattern = cairo_pattern_create_linear (SIZE/2, 0, SIZE, 0);
+    cairo_pattern_add_color_stop_rgba (pattern, 0, 0, 0, 0, 1.);
+    cairo_pattern_add_color_stop_rgba (pattern, 1, 0, 0, 0, 0.);
+    cairo_set_source (cr, pattern);
+    cairo_pattern_destroy (pattern);
+    cairo_arc (cr, SIZE / 2.0, SIZE / 2.0,
+	       0.6 * SIZE / 2.0,
+	       0, 2.0 * M_PI);
+    cairo_fill (cr);
+    cairo_restore (cr);
+
+    cairo_set_source_rgb (cr, 1, 1, 1); /* white */
+    cairo_set_font_size (cr, .25 * SIZE / 2.0);
+    cairo_text_extents (cr, text, &extents);
+    cairo_move_to (cr, (SIZE-extents.width)/2.0-extents.x_bearing,
+		       (SIZE-extents.height)/2.0-extents.y_bearing);
+    cairo_show_text (cr, text);
+
+    cairo_restore (cr);
+}
+
+static void
+_xunlink (const cairo_test_context_t *ctx, const char *pathname)
+{
+    if (unlink (pathname) < 0 && errno != ENOENT) {
+	cairo_test_log (ctx, "Error: Cannot remove %s: %s\n",
+			pathname, strerror (errno));
+	exit (1);
+    }
+}
+
+static cairo_bool_t
+check_result (cairo_test_context_t *ctx,
+	      const cairo_boilerplate_target_t *target,
+	      const char *test_name,
+	      const char *base_name,
+	      cairo_surface_t *surface)
+{
+    const char *format;
+    char *ref_name;
+    char *png_name;
+    char *diff_name;
+    cairo_surface_t *test_image, *ref_image, *diff_image;
+    buffer_diff_result_t result;
+    cairo_status_t status;
+    cairo_bool_t ret;
+
+    /* XXX log target, OUTPUT, REFERENCE, DIFFERENCE for index.html */
+
+    if (target->finish_surface != NULL) {
+	status = target->finish_surface (surface);
+	if (status) {
+	    cairo_test_log (ctx, "Error: Failed to finish surface: %s\n",
+		    cairo_status_to_string (status));
+	    cairo_surface_destroy (surface);
+	    return FALSE;
+	}
+    }
+
+    xasprintf (&png_name,  "%s.out.png", base_name);
+    xasprintf (&diff_name, "%s.diff.png", base_name);
+
+    test_image = target->get_image_surface (surface, 0, SIZE, SIZE);
+    if (cairo_surface_status (test_image)) {
+	cairo_test_log (ctx, "Error: Failed to extract page: %s\n",
+		        cairo_status_to_string (cairo_surface_status (test_image)));
+	cairo_surface_destroy (test_image);
+	free (png_name);
+	free (diff_name);
+	return FALSE;
+    }
+
+    _xunlink (ctx, png_name);
+    status = cairo_surface_write_to_png (test_image, png_name);
+    if (status) {
+	cairo_test_log (ctx, "Error: Failed to write output image: %s\n",
+		cairo_status_to_string (status));
+	cairo_surface_destroy (test_image);
+	free (png_name);
+	free (diff_name);
+	return FALSE;
+    }
+
+    format = cairo_boilerplate_content_name (target->content);
+    ref_name = cairo_test_reference_filename (ctx,
+					      base_name,
+					      test_name,
+					      target->name,
+					      target->basename,
+					      format,
+					      CAIRO_TEST_REF_SUFFIX,
+					      CAIRO_TEST_PNG_EXTENSION);
+    if (ref_name == NULL) {
+	cairo_test_log (ctx, "Error: Cannot find reference image for %s\n",
+		        base_name);
+	cairo_surface_destroy (test_image);
+	free (png_name);
+	free (diff_name);
+	return FALSE;
+    }
+
+
+    ref_image = cairo_test_get_reference_image (ctx, ref_name,
+	    target->content == CAIRO_TEST_CONTENT_COLOR_ALPHA_FLATTENED);
+    if (cairo_surface_status (ref_image)) {
+	cairo_test_log (ctx, "Error: Cannot open reference image for %s: %s\n",
+		        ref_name,
+		cairo_status_to_string (cairo_surface_status (ref_image)));
+	cairo_surface_destroy (ref_image);
+	cairo_surface_destroy (test_image);
+	free (png_name);
+	free (diff_name);
+	free (ref_name);
+	return FALSE;
+    }
+
+    diff_image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+	    SIZE, SIZE);
+
+    ret = TRUE;
+    status = image_diff (ctx,
+	    test_image, ref_image, diff_image,
+	    &result);
+    _xunlink (ctx, diff_name);
+    if (status) {
+	cairo_test_log (ctx, "Error: Failed to compare images: %s\n",
+			cairo_status_to_string (status));
+	ret = FALSE;
+    } else if (image_diff_is_failure (&result, target->error_tolerance))
+    {
+	ret = FALSE;
+
+	status = cairo_surface_write_to_png (diff_image, diff_name);
+	if (status) {
+	    cairo_test_log (ctx, "Error: Failed to write differences image: %s\n",
+		    cairo_status_to_string (status));
+	}
+    }
+
+    cairo_surface_destroy (test_image);
+    cairo_surface_destroy (diff_image);
+    free (png_name);
+    free (diff_name);
+    free (ref_name);
+
+    return ret;
+}
+
+#if GENERATE_REFERENCE
+static void
+generate_reference (double ppi_x, double ppi_y, const char *filename)
+{
+    cairo_surface_t *surface, *target;
+    cairo_t *cr;
+    cairo_status_t status;
+
+    surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+	                                  SIZE*ppi_x/72, SIZE*ppi_y/72);
+    cr = cairo_create (surface);
+    cairo_surface_destroy (surface);
+
+    /* As we wish to mimic a PDF surface, copy across the default font options
+     * from the PDF backend.
+     */
+    {
+	cairo_surface_t *pdf;
+	cairo_font_options_t *options;
+
+	options = cairo_font_options_create ();
+
+#if CAIRO_HAS_PDF_SURFACE
+	pdf = cairo_pdf_surface_create ("tmp.pdf", 1, 1);
+	cairo_surface_get_font_options (pdf, options);
+	cairo_surface_destroy (pdf);
+#endif
+
+	cairo_set_font_options (cr, options);
+	cairo_font_options_destroy (options);
+    }
+
+#if SET_TOLERANCE
+    cairo_set_tolerance (cr, 3.0);
+#endif
+
+    cairo_save (cr); {
+	cairo_set_source_rgb (cr, 1, 1, 1);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    cairo_scale (cr, ppi_x/72., ppi_y/72.);
+    draw (cr, SIZE, SIZE);
+
+    surface = cairo_surface_reference (cairo_get_target (cr));
+    cairo_destroy (cr);
+
+    target = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SIZE, SIZE);
+    cr = cairo_create (target);
+    cairo_scale (cr, 72./ppi_x, 72./ppi_y);
+    cairo_set_source_surface (cr, surface, 0, 0);
+    cairo_paint (cr);
+
+    status = cairo_surface_write_to_png (cairo_get_target (cr), filename);
+    cairo_destroy (cr);
+
+    if (status) {
+	fprintf (stderr, "Failed to generate reference image '%s': %s\n",
+		 filename, cairo_status_to_string (status));
+	exit (1);
+    }
+}
+#endif
+
+/* TODO: Split each ppi case out to its own CAIRO_TEST() test case */
+static cairo_test_status_t
+preamble (cairo_test_context_t *ctx)
+{
+    cairo_t *cr;
+    cairo_test_status_t ret = CAIRO_TEST_UNTESTED;
+    struct {
+	double x, y;
+    } ppi[] = {
+	{ 576, 576 },
+	{ 576, 72 },
+
+	{ 288, 288 },
+	{ 288, 72 },
+
+	{ 144, 144 },
+	{ 144, 72 },
+
+	{ 72, 576 },
+	{ 72, 288 },
+	{ 72, 144 },
+	{ 72, 72 },
+    };
+    unsigned int i;
+    int n, num_ppi;
+    const char *path = cairo_test_mkdir (CAIRO_TEST_OUTPUT_DIR) ? CAIRO_TEST_OUTPUT_DIR : ".";
+
+    num_ppi = ARRAY_LENGTH (ppi);
+
+#if GENERATE_REFERENCE
+    for (n = 0; n < num_ppi; n++) {
+	char *ref_name;
+	xasprintf (&ref_name, "reference/fallback-resolution.ppi%gx%g.ref.png",
+		   ppi[n].x, ppi[n].y);
+	generate_reference (ppi[n].x, ppi[n].y, ref_name);
+	free (ref_name);
+    }
+#endif
+
+    for (i = 0; i < ctx->num_targets; i++) {
+	const cairo_boilerplate_target_t *target = ctx->targets_to_test[i];
+	cairo_surface_t *surface = NULL;
+	char *base_name;
+	void *closure;
+	const char *format;
+	cairo_status_t status;
+
+	if (! target->is_vector)
+	    continue;
+
+	if (! cairo_test_is_target_enabled (ctx, target->name))
+	    continue;
+
+	format = cairo_boilerplate_content_name (target->content);
+	xasprintf (&base_name, "%s/fallback-resolution.%s.%s",
+		   path, target->name,
+		   format);
+
+	surface = (target->create_surface) (base_name,
+					    target->content,
+					    SIZE, SIZE,
+					    SIZE, SIZE,
+					    CAIRO_BOILERPLATE_MODE_TEST,
+					    &closure);
+
+	if (surface == NULL) {
+	    free (base_name);
+	    continue;
+	}
+
+	if (ret == CAIRO_TEST_UNTESTED)
+	    ret = CAIRO_TEST_SUCCESS;
+
+	cairo_surface_destroy (surface);
+	if (target->cleanup)
+	    target->cleanup (closure);
+	free (base_name);
+
+	/* we need to recreate the surface for each resolution as we include
+	 * SVG in testing which does not support the paginated interface.
+	 */
+	for (n = 0; n < num_ppi; n++) {
+	    char *test_name;
+	    cairo_bool_t pass;
+
+	    xasprintf (&test_name, "fallback-resolution.ppi%gx%g",
+		       ppi[n].x, ppi[n].y);
+	    xasprintf (&base_name, "%s/%s.%s.%s",
+		       path, test_name,
+		       target->name,
+		       format);
+
+	    surface = (target->create_surface) (base_name,
+						target->content,
+						SIZE + 25, SIZE + 25,
+						SIZE + 25, SIZE + 25,
+						CAIRO_BOILERPLATE_MODE_TEST,
+						&closure);
+	    if (surface == NULL || cairo_surface_status (surface)) {
+		cairo_test_log (ctx, "Failed to generate surface: %s.%s\n",
+				target->name,
+				format);
+		free (base_name);
+		free (test_name);
+		ret = CAIRO_TEST_FAILURE;
+		continue;
+	    }
+
+	    cairo_test_log (ctx,
+			    "Testing fallback-resolution %gx%g with %s target\n",
+			    ppi[n].x, ppi[n].y, target->name);
+	    printf ("%s:\t", base_name);
+	    fflush (stdout);
+
+	    if (target->force_fallbacks != NULL)
+		target->force_fallbacks (surface, ppi[n].x, ppi[n].y);
+	    cr = cairo_create (surface);
+#if SET_TOLERANCE
+	    cairo_set_tolerance (cr, 3.0);
+#endif
+
+	    cairo_surface_set_device_offset (surface, 25, 25);
+
+	    cairo_save (cr); {
+		cairo_set_source_rgb (cr, 1, 1, 1);
+		cairo_paint (cr);
+	    } cairo_restore (cr);
+
+	    /* First draw the top half in a conventional way. */
+	    cairo_save (cr); {
+		cairo_rectangle (cr, 0, 0, SIZE, SIZE / 2.0);
+		cairo_clip (cr);
+
+		draw (cr, SIZE, SIZE);
+	    } cairo_restore (cr);
+
+	    /* Then draw the bottom half in a separate group,
+	     * (exposing a bug in 1.6.4 with the group not being
+	     * rendered with the correct fallback resolution). */
+	    cairo_save (cr); {
+		cairo_rectangle (cr, 0, SIZE / 2.0, SIZE, SIZE / 2.0);
+		cairo_clip (cr);
+
+		cairo_push_group (cr); {
+		    draw (cr, SIZE, SIZE);
+		} cairo_pop_group_to_source (cr);
+
+		cairo_paint (cr);
+	    } cairo_restore (cr);
+
+	    status = cairo_status (cr);
+	    cairo_destroy (cr);
+
+	    pass = FALSE;
+	    if (status) {
+		cairo_test_log (ctx, "Error: Failed to create target surface: %s\n",
+				cairo_status_to_string (status));
+		ret = CAIRO_TEST_FAILURE;
+	    } else {
+		/* extract the image and compare it to our reference */
+		if (! check_result (ctx, target, test_name, base_name, surface))
+		    ret = CAIRO_TEST_FAILURE;
+		else
+		    pass = TRUE;
+	    }
+	    cairo_surface_destroy (surface);
+	    if (target->cleanup)
+		target->cleanup (closure);
+
+	    free (base_name);
+	    free (test_name);
+
+	    if (pass) {
+		printf ("PASS\n");
+	    } else {
+		printf ("FAIL\n");
+	    }
+	    fflush (stdout);
+	}
+    }
+
+    return ret;
+}
+
+CAIRO_TEST (fallback_resolution,
+	    "Check handling of fallback resolutions",
+	    "fallback", /* keywords */
+	    NULL, /* requirements */
+	    0, 0,
+	    preamble, NULL)