gtk/tests/reftests/gtk-reftest.c
2012-02-27 17:06:11 +00:00

611 lines
16 KiB
C

/*
* Copyright (C) 2011 Red Hat Inc.
*
* Author:
* Benjamin Otte <otte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
typedef enum {
SNAPSHOT_WINDOW,
SNAPSHOT_DRAW
} SnapshotMode;
/* This is exactly the style information you've been looking for */
#define GTK_STYLE_PROVIDER_PRIORITY_FORCE G_MAXUINT
static char *arg_output_dir = NULL;
static const GOptionEntry test_args[] = {
{ "output", 'o', 0, G_OPTION_ARG_FILENAME, &arg_output_dir,
"Directory to save image files to", "DIR" },
{ NULL }
};
static gboolean
parse_command_line (int *argc, char ***argv)
{
GError *error = NULL;
GOptionContext *context;
context = g_option_context_new ("- run GTK reftests");
g_option_context_add_main_entries (context, test_args, NULL);
g_option_context_set_ignore_unknown_options (context, TRUE);
if (!g_option_context_parse (context, argc, argv, &error))
{
g_print ("option parsing failed: %s\n", error->message);
return FALSE;
}
gtk_test_init (argc, argv);
return TRUE;
}
static const char *
get_output_dir (void)
{
static const char *output_dir = NULL;
GError *error = NULL;
if (output_dir)
return output_dir;
if (arg_output_dir)
{
GFile *file = g_file_new_for_commandline_arg (arg_output_dir);
output_dir = g_file_get_path (file);
g_object_unref (file);
}
else
{
output_dir = g_get_tmp_dir ();
}
if (!g_file_test (output_dir, G_FILE_TEST_EXISTS))
{
GFile *file;
file = g_file_new_for_path (output_dir);
g_assert (g_file_make_directory_with_parents (file, NULL, &error));
g_assert_no_error (error);
g_object_unref (file);
}
return output_dir;
}
static char *
get_output_file (const char *test_file,
const char *extension)
{
const char *output_dir = get_output_dir ();
char *result, *base;
base = g_path_get_basename (test_file);
if (g_str_has_suffix (base, ".ui"))
base[strlen (base) - strlen (".ui")] = '\0';
result = g_strconcat (output_dir, G_DIR_SEPARATOR_S, base, extension, NULL);
g_free (base);
return result;
}
static char *
get_test_file (const char *test_file,
const char *extension,
gboolean must_exist)
{
GString *file = g_string_new (NULL);
if (g_str_has_suffix (test_file, ".ui"))
g_string_append_len (file, test_file, strlen (test_file) - strlen (".ui"));
else
g_string_append (file, test_file);
g_string_append (file, extension);
if (must_exist &&
!g_file_test (file->str, G_FILE_TEST_EXISTS))
{
g_string_free (file, TRUE);
return NULL;
}
return g_string_free (file, FALSE);
}
static GtkStyleProvider *
add_extra_css (const char *testname,
const char *extension)
{
GtkStyleProvider *provider = NULL;
char *css_file;
css_file = get_test_file (testname, extension, TRUE);
if (css_file == NULL)
return NULL;
provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
gtk_css_provider_load_from_path (GTK_CSS_PROVIDER (provider),
css_file,
NULL);
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
provider,
GTK_STYLE_PROVIDER_PRIORITY_FORCE);
g_free (css_file);
return provider;
}
static void
remove_extra_css (GtkStyleProvider *provider)
{
if (provider == NULL)
return;
gtk_style_context_remove_provider_for_screen (gdk_screen_get_default (),
provider);
}
static GtkWidget *
builder_get_toplevel (GtkBuilder *builder)
{
GSList *list, *walk;
GtkWidget *window = NULL;
list = gtk_builder_get_objects (builder);
for (walk = list; walk; walk = walk->next)
{
if (GTK_IS_WINDOW (walk->data) &&
gtk_widget_get_parent (walk->data) == NULL)
{
window = walk->data;
break;
}
}
g_slist_free (list);
return window;
}
static gboolean
quit_when_idle (gpointer loop)
{
g_main_loop_quit (loop);
return G_SOURCE_REMOVE;
}
static void
check_for_draw (GdkEvent *event, gpointer loop)
{
if (event->type == GDK_EXPOSE)
{
g_idle_add (quit_when_idle, loop);
gdk_event_handler_set ((GdkEventFunc) gtk_main_do_event, NULL, NULL);
}
gtk_main_do_event (event);
}
static cairo_surface_t *
snapshot_widget (GtkWidget *widget, SnapshotMode mode)
{
cairo_surface_t *surface;
cairo_pattern_t *bg;
GMainLoop *loop;
cairo_t *cr;
g_assert (gtk_widget_get_realized (widget));
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
loop = g_main_loop_new (NULL, FALSE);
/* We wait until the widget is drawn for the first time.
* We can not wait for a GtkWidget::draw event, because that might not
* happen if the window is fully obscured by windowed child widgets.
* Alternatively, we could wait for an expose event on widget's window.
* Both of these are rather hairy, not sure what's best. */
gdk_event_handler_set (check_for_draw, loop, NULL);
g_main_loop_run (loop);
cr = cairo_create (surface);
switch (mode)
{
case SNAPSHOT_WINDOW:
{
GdkWindow *window = gtk_widget_get_window (widget);
if (gdk_window_get_window_type (window) == GDK_WINDOW_TOPLEVEL ||
gdk_window_get_window_type (window) == GDK_WINDOW_FOREIGN)
{
/* give the WM/server some time to sync. They need it.
* Also, do use popups instead of toplevls in your tests
* whenever you can. */
gdk_display_sync (gdk_window_get_display (window));
g_timeout_add (500, quit_when_idle, loop);
g_main_loop_run (loop);
}
gdk_cairo_set_source_window (cr, window, 0, 0);
cairo_paint (cr);
}
break;
case SNAPSHOT_DRAW:
bg = gdk_window_get_background_pattern (gtk_widget_get_window (widget));
if (bg)
{
cairo_set_source (cr, bg);
cairo_paint (cr);
}
gtk_widget_draw (widget, cr);
break;
default:
g_assert_not_reached();
break;
}
cairo_destroy (cr);
g_main_loop_unref (loop);
gtk_widget_destroy (widget);
return surface;
}
static cairo_surface_t *
snapshot_ui_file (const char *ui_file)
{
GtkWidget *window;
GtkBuilder *builder;
GError *error = NULL;
builder = gtk_builder_new ();
gtk_builder_add_from_file (builder, ui_file, &error);
g_assert_no_error (error);
window = builder_get_toplevel (builder);
g_object_unref (builder);
g_assert (window);
gtk_widget_show (window);
return snapshot_widget (window, SNAPSHOT_WINDOW);
}
static void
save_image (cairo_surface_t *surface,
const char *test_name,
const char *extension)
{
char *filename = get_output_file (test_name, extension);
g_test_message ("Storing test result image at %s", filename);
g_assert (cairo_surface_write_to_png (surface, filename) == CAIRO_STATUS_SUCCESS);
g_free (filename);
}
static void
get_surface_size (cairo_surface_t *surface,
int *width,
int *height)
{
GdkRectangle area;
cairo_t *cr;
cr = cairo_create (surface);
if (!gdk_cairo_get_clip_rectangle (cr, &area))
{
g_assert_not_reached ();
}
g_assert (area.x == 0 && area.y == 0);
g_assert (area.width > 0 && area.height > 0);
*width = area.width;
*height = area.height;
}
static cairo_surface_t *
coerce_surface_for_comparison (cairo_surface_t *surface,
int width,
int height)
{
cairo_surface_t *coerced;
cairo_t *cr;
coerced = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width,
height);
cr = cairo_create (coerced);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
g_assert (cairo_surface_status (coerced) == CAIRO_STATUS_SUCCESS);
return coerced;
}
/* Compares two CAIRO_FORMAT_ARGB32 buffers, returning NULL if the
* buffers are equal or a surface containing a diff between the two
* surfaces.
*
* This function should be rewritten to compare all formats supported by
* cairo_format_t instead of taking a mask as a parameter.
*
* This function is originally from cairo:test/buffer-diff.c.
* Copyright © 2004 Richard D. Worth
*/
static cairo_surface_t *
buffer_diff_core (const guchar *buf_a,
int stride_a,
const guchar *buf_b,
int stride_b,
int width,
int height)
{
int x, y;
guchar *buf_diff = NULL;
int stride_diff = 0;
cairo_surface_t *diff = NULL;
for (y = 0; y < height; y++)
{
const guint32 *row_a = (const guint32 *) (buf_a + y * stride_a);
const guint32 *row_b = (const guint32 *) (buf_b + y * stride_b);
guint32 *row = (guint32 *) (buf_diff + y * stride_diff);
for (x = 0; x < width; x++)
{
int channel;
guint32 diff_pixel = 0;
/* check if the pixels are the same */
if (row_a[x] == row_b[x])
continue;
if (diff == NULL)
{
diff = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
width,
height);
g_assert (cairo_surface_status (diff) == CAIRO_STATUS_SUCCESS);
buf_diff = cairo_image_surface_get_data (diff);
stride_diff = cairo_image_surface_get_stride (diff);
row = (guint32 *) (buf_diff + y * stride_diff);
}
/* calculate a difference value for all 4 channels */
for (channel = 0; channel < 4; channel++)
{
int value_a = (row_a[x] >> (channel*8)) & 0xff;
int value_b = (row_b[x] >> (channel*8)) & 0xff;
guint diff;
diff = ABS (value_a - value_b);
diff *= 4; /* emphasize */
if (diff)
diff += 128; /* make sure it's visible */
if (diff > 255)
diff = 255;
diff_pixel |= diff << (channel*8);
}
if ((diff_pixel & 0x00ffffff) == 0)
{
/* alpha only difference, convert to luminance */
guint8 alpha = diff_pixel >> 24;
diff_pixel = alpha * 0x010101;
}
row[x] = diff_pixel;
}
}
return diff;
}
static cairo_surface_t *
compare_surfaces (const char *test_file,
cairo_surface_t *surface1,
cairo_surface_t *surface2)
{
int w1, h1, w2, h2, w, h;
cairo_surface_t *diff;
get_surface_size (surface1, &w1, &h1);
get_surface_size (surface2, &w2, &h2);
w = MAX (w1, w2);
h = MAX (h1, h2);
surface1 = coerce_surface_for_comparison (surface1, w, h);
surface2 = coerce_surface_for_comparison (surface2, w, h);
diff = buffer_diff_core (cairo_image_surface_get_data (surface1),
cairo_image_surface_get_stride (surface1),
cairo_image_surface_get_data (surface2),
cairo_image_surface_get_stride (surface2),
w, h);
return diff;
}
static void
test_ui_file (GFile *file)
{
char *ui_file, *reference_file;
cairo_surface_t *ui_image, *reference_image, *diff_image;
GtkStyleProvider *provider;
ui_file = g_file_get_path (file);
provider = add_extra_css (ui_file, ".css");
ui_image = snapshot_ui_file (ui_file);
reference_file = get_test_file (ui_file, ".ref.ui", TRUE);
if (reference_file)
reference_image = snapshot_ui_file (reference_file);
else
{
reference_image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
g_test_message ("No reference image.");
g_test_fail ();
}
g_free (reference_file);
diff_image = compare_surfaces (ui_file, ui_image, reference_image);
save_image (ui_image, ui_file, ".out.png");
save_image (reference_image, ui_file, ".ref.png");
if (diff_image)
{
save_image (diff_image, ui_file, ".diff.png");
g_test_fail ();
}
remove_extra_css (provider);
}
static void
add_test_for_file (GFile *file)
{
g_test_add_vtable (g_file_get_path (file),
0,
g_object_ref (file),
NULL,
(GTestFixtureFunc) test_ui_file,
(GTestFixtureFunc) g_object_unref);
}
static int
compare_files (gconstpointer a, gconstpointer b)
{
GFile *file1 = G_FILE (a);
GFile *file2 = G_FILE (b);
char *path1, *path2;
int result;
path1 = g_file_get_path (file1);
path2 = g_file_get_path (file2);
result = strcmp (path1, path2);
g_free (path1);
g_free (path2);
return result;
}
static void
add_tests_for_files_in_directory (GFile *dir)
{
GFileEnumerator *enumerator;
GFileInfo *info;
GList *files;
GError *error = NULL;
enumerator = g_file_enumerate_children (dir, G_FILE_ATTRIBUTE_STANDARD_NAME, 0, NULL, &error);
g_assert_no_error (error);
files = NULL;
while ((info = g_file_enumerator_next_file (enumerator, NULL, &error)))
{
const char *filename;
filename = g_file_info_get_name (info);
if (!g_str_has_suffix (filename, ".ui") ||
g_str_has_suffix (filename, ".ref.ui"))
{
g_object_unref (info);
continue;
}
files = g_list_prepend (files, g_file_get_child (dir, filename));
g_object_unref (info);
}
g_assert_no_error (error);
g_object_unref (enumerator);
files = g_list_sort (files, compare_files);
g_list_foreach (files, (GFunc) add_test_for_file, NULL);
g_list_free_full (files, g_object_unref);
}
int
main (int argc, char **argv)
{
/* I don't want to fight fuzzy scaling algorithms in GPUs,
* so unles you explicitly set it to something else, we
* will use Cairo's image surface.
*/
g_setenv ("GDK_RENDERING", "image", FALSE);
if (!parse_command_line (&argc, &argv))
return 1;
if (argc < 2)
{
const char *basedir;
GFile *dir;
if (g_getenv ("srcdir"))
basedir = g_getenv ("srcdir");
else
basedir = ".";
dir = g_file_new_for_path (basedir);
add_tests_for_files_in_directory (dir);
g_object_unref (dir);
}
else
{
guint i;
for (i = 1; i < argc; i++)
{
GFile *file = g_file_new_for_commandline_arg (argv[i]);
add_test_for_file (file);
g_object_unref (file);
}
}
return g_test_run ();
}