gtk3/gdk/testgdk.c

/* testgdk -- validation program for GDK
 * Copyright (C) 2000 Tor Lillqvist
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* This program is intended to be used to validate the correctness of
 * the basic graphics operations in a GDK backend. The results of the
 * operations are compared against those produced by a correctly
 * functioning X11 backend (and X11 server).
 *
 * Obviously, only the most basic operations reasonably be expected to
 * produce pixel-by-pixel identical results as the X11 backend. We
 * don't even try to test the correctness of ellipses, tiles or
 * stipples. Not to mention fonts.
 *
 * But, for those operations we do test, we should try to test quite
 * many combinations of parameters.
 *
 * This is just a quick hack, and could be improved a lot. There are
 * copy-pasted code snippets all over that need to be factored out
 * into separate functions.
 */

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <gdk/gdk.h>

/* CQTESTF -- "Conditionally Quiet TEST with Fail message"
 * macro that prints PASS or FAIL messages
 * parms:	quiet:	if TRUE, only print FAIL messages
 *		expr:	the expression to test
 *		failfmt:if expr is FALSE, print this message
 *			(both format and args)
 */

#define CQTESTF(quiet, expr, failfmt) \
  (tmpb = (expr), \
   (tmpb ? (quiet ? 0 : printf ("PASS: %d %s\n", __LINE__, #expr)) \
         : (printf ("FAIL: %d %s", __LINE__, #expr), \
         printf failfmt, \
         printf ("\n"), \
         retval = FALSE, \
         error (), \
         return_value++)), \
   tmpb)

/* Variations with less parms */

#define CQTEST(quiet, expr) \
  CQTESTF (quiet, expr, (""))

#define TEST(expr) \
  CQTEST (FALSE, expr)

#define QTEST(expr) \
  CQTEST (TRUE, expr)

#define TESTF(expr, failfmt) \
  CQTESTF (FALSE, expr, failfmt)

#define QTESTF(expr, failfmt) \
  CQTESTF (TRUE, expr, failfmt)

#ifndef _DEBUG
#define ASSERT(expr) \
  do { \
    if (!QTEST (expr)) \
      printf ("That is fatal. Goodbye\n"), exit (1);\
  } while (0)
#else
static void
my_break()
{
  G_BREAKPOINT();
}
#define ASSERT(expr) \
  do { \
    if (!QTEST (expr)) \
      printf ("That is fatal. Goodbye\n"), my_break();\
  } while (0)
#endif

#define N(a) (sizeof(a)/sizeof(*a))

static int return_value = 0;

static gboolean retval;
static gboolean tmpb;

static GdkVisual *system_visual;
static GdkVisual *best_visual;
static GdkWindow *w;

static GdkColormap *system_colourmap;

static GdkColor white, black, red, green, blue, rand1_colour, rand2_colour;

static GdkGC *black_gc, *white_gc, *red_gc, *rand1_gc, *rand2_gc;
static GdkGC *gcs[5];
static GdkGC *black_bitmap_gc;

static int
error (void)
{
  /* Place breakpoint here to catch failures */
  return 0;
}

static gboolean
test_visual_coherency (gboolean   quiet,
                 GdkVisual *visual)
{
  gboolean retval = TRUE;

  CQTEST (quiet, visual->type >= GDK_VISUAL_STATIC_GRAY &&
	  visual->type <= GDK_VISUAL_DIRECT_COLOR);
  CQTEST (quiet, visual->depth >= 1 && visual->depth <= 32);
  CQTEST (quiet, visual->byte_order == GDK_LSB_FIRST || visual->byte_order ==
	  GDK_MSB_FIRST);
  
  return retval;
}

/* Test visuals
 */
static void
test_visuals (void)
{
  GdkVisual *visual;
  GList *visuals;

  system_visual = gdk_visual_get_system ();
  ASSERT (system_visual != NULL);
  TEST (test_visual_coherency (FALSE, system_visual));

  best_visual = gdk_visual_get_best ();
  if (best_visual != system_visual)
    TEST (test_visual_coherency (TRUE, best_visual));

  visuals = gdk_list_visuals ();
  while (visuals)
    {
      visual = visuals->data;
      TEST (test_visual_coherency (TRUE, visual));
      visuals = visuals->next;
    }
}

/* Create a top-level window used by other tests
 */
static void
test_first_window (void)
{
  GdkWindowAttr wa;

  wa.width = 100;
  wa.height = 100;
  wa.window_type = GDK_WINDOW_TOPLEVEL;
  wa.wclass = GDK_INPUT_OUTPUT;

  w = gdk_window_new (NULL, &wa, 0);

  ASSERT (w != NULL);
}

/* Test colourmaps.
 */
static void
test_colourmaps (void)
{
  system_colourmap = gdk_colormap_get_system ();
  ASSERT (system_colourmap != NULL);
}

/* Test colours.
 */
static void
test_colours (void)
{
  ASSERT (gdk_color_white (system_colourmap, &white));
  ASSERT (gdk_color_black (system_colourmap, &black));
  red.red = 65535;
  red.green = red.blue = 0;
  TEST (gdk_colormap_alloc_color (system_colourmap, &red, FALSE, TRUE));

  rand1_colour.red = rand () % 65536;
  rand1_colour.green = rand () % 65536;
  rand1_colour.blue = rand () % 65536;
  TEST (gdk_colormap_alloc_color (system_colourmap, &rand1_colour, FALSE,
TRUE));

  rand2_colour.red = rand () % 65536;
  rand2_colour.green = rand () % 65536;
  rand2_colour.blue = rand () % 65536;
  TEST (gdk_colormap_alloc_color (system_colourmap, &rand2_colour, FALSE,
TRUE));
}

static gboolean
test_default_gc (GdkGCValues *gcvalues,
           gboolean     quiet)
{
  gboolean retval = TRUE;

  CQTEST (quiet, gcvalues->foreground.pixel == 0);
  CQTEST (quiet, gcvalues->background.pixel == 1);
  CQTEST (quiet, gcvalues->function == GDK_COPY);
  CQTEST (quiet, gcvalues->fill == GDK_SOLID);
  CQTEST (quiet, gcvalues->tile == NULL);
  CQTEST (quiet, gcvalues->stipple == NULL);
  CQTEST (quiet, gcvalues->clip_mask == NULL);
  CQTEST (quiet, gcvalues->subwindow_mode == GDK_CLIP_BY_CHILDREN);
  CQTEST (quiet, gcvalues->line_width == 0);
  CQTEST (quiet, gcvalues->line_style == GDK_LINE_SOLID);
  CQTEST (quiet, gcvalues->cap_style == GDK_CAP_BUTT);
  CQTEST (quiet, gcvalues->join_style == GDK_JOIN_MITER);

  return retval;
}

/* Create GdkGCs with various values,
 * check that gdk_gc_get_values returns the same,
 * or something reasonably close.
 */
static void
test_gcs (void)
{
  GdkPixmap *pixmap;
  GdkGC *gc;
  GdkGCValues gcvalues;
  GdkColor colour;
  GdkFunction function;
  GdkFill fill;
  gboolean retval;

  gc = gdk_gc_new (w);
  gdk_gc_get_values (gc, &gcvalues);
  test_default_gc (&gcvalues, FALSE);

  colour.pixel = 1234;
  gdk_gc_set_foreground (gc, &colour);
  gdk_gc_get_values (gc, &gcvalues);
  TEST (gcvalues.foreground.pixel == 1234);

  colour.pixel = 0;
  gdk_gc_set_foreground (gc, &colour);
  gdk_gc_get_values (gc, &gcvalues);
  TEST (test_default_gc (&gcvalues, TRUE));

  colour.pixel = 5678;
  gdk_gc_set_background (gc, &colour);
  gdk_gc_get_values (gc, &gcvalues);
  TEST (gcvalues.background.pixel == 5678);

  colour.pixel = 1;
  gdk_gc_set_background (gc, &colour);
  gdk_gc_get_values (gc, &gcvalues);
  TEST (test_default_gc (&gcvalues, TRUE));

  retval = TRUE;
  for (function = GDK_COPY; function <= GDK_SET; function++)
    {
      gdk_gc_set_function (gc, function);
      gdk_gc_get_values (gc, &gcvalues);
      QTEST (gcvalues.function == function);
      gdk_gc_set_function (gc, GDK_COPY);
      gdk_gc_get_values (gc, &gcvalues);
      QTEST (test_default_gc (&gcvalues, TRUE));
    }
  TEST (retval);

  retval = TRUE;
  for (fill = GDK_SOLID; fill <= GDK_OPAQUE_STIPPLED; fill++)
    {
      gdk_gc_set_fill (gc, fill);
      gdk_gc_get_values (gc, &gcvalues);
      QTEST (gcvalues.fill == fill);
      gdk_gc_set_fill (gc, GDK_SOLID);
      gdk_gc_get_values (gc, &gcvalues);
      QTEST (test_default_gc (&gcvalues, TRUE));
    }
  TEST (retval);

  black_gc = gdk_gc_new (w);
  gdk_gc_copy (black_gc, gc);
  gdk_gc_get_values (black_gc, &gcvalues);
  TEST (test_default_gc (&gcvalues, TRUE));
  gdk_gc_unref (gc);

  gdk_gc_set_foreground (black_gc, &black);
  gdk_gc_get_values (black_gc, &gcvalues);
  TEST (gcvalues.foreground.pixel == black.pixel);

  white_gc = gdk_gc_new (w);

  gdk_gc_set_foreground (white_gc, &white);
  gdk_gc_get_values (white_gc, &gcvalues);
  TEST (gcvalues.foreground.pixel == white.pixel);

  red_gc = gdk_gc_new (w);
  gdk_gc_set_foreground (red_gc, &red);
  gdk_gc_get_values (red_gc, &gcvalues);
  TEST (gcvalues.foreground.pixel == red.pixel);

  rand1_gc = gdk_gc_new (w);
  gdk_gc_set_foreground (rand1_gc, &rand1_colour);
  gdk_gc_get_values (rand1_gc, &gcvalues);
  TESTF (gcvalues.foreground.pixel == rand1_colour.pixel,
	 (" %#06x != %#06x", gcvalues.foreground.pixel, rand1_colour.pixel));

  rand2_gc = gdk_gc_new (w);
  gdk_gc_set_foreground (rand2_gc, &rand2_colour);
  gdk_gc_get_values (rand2_gc, &gcvalues);
  TESTF (gcvalues.foreground.pixel == rand2_colour.pixel,
	 (" %#06x != %#06x", gcvalues.foreground.pixel, rand2_colour.pixel));

  gcs[0] = black_gc;
  gcs[1] = white_gc;
  gcs[2] = red_gc;
  gcs[3] = rand1_gc;
  gcs[4] = rand2_gc;

  pixmap = gdk_pixmap_new (NULL, 1, 1, 1);
  black_bitmap_gc = gdk_gc_new (pixmap);
  g_object_unref (pixmap);
}

/* Create pixmaps, check that properties are as expected.
 * No graphic operations tested yet.
 */
static void
test_pixmaps (gint depth)
{
  GdkPixmap *pixmap;
  GdkImage *image;
  GdkGC *gc;
  gint width, height;
  gint w, h;
  gboolean retval = TRUE;

  for (width = 1; width <= 64; width += 2)
    for (height = 1; height <= 32; height += 3)
      {
	pixmap = gdk_pixmap_new (NULL, width, height, depth);
	ASSERT (pixmap != NULL);
	gdk_window_get_size (pixmap, &w, &h);
	QTESTF (w == width, (" w:%d", w));
	QTESTF (h == height, (" h:%d", h));
	image = gdk_image_get (pixmap, 0, 0, w, h);
	QTEST (image != NULL);
	QTEST (image->width == width);
	QTEST (image->height == height);
	QTEST (image->depth == depth);
	gdk_image_destroy (image);
	g_object_unref (pixmap);
      }
  TEST (retval);
}

/* Ditto for images.
 */
static void
test_images (void)
{
  GdkImage *image;
  GdkImageType image_type;
  gint width, height;
  gboolean retval = TRUE;

  for (width = 1; width <= 64; width += 3)
    for (height = 1; height <= 32; height += 7)
      for (image_type = GDK_IMAGE_NORMAL;
	   image_type <= GDK_IMAGE_FASTEST;
	   image_type++)
	{
	  image = gdk_image_new (image_type, system_visual, width, height);
	  if (image == NULL && image_type == GDK_IMAGE_SHARED)
	    /* Ignore failure to create shared image,
	     * display might not be local.
	     */
	    ;
	  else
	    {
	      ASSERT (image != NULL);
	      QTEST (image->width == width);
	      QTEST (image->height == height);
	      QTEST (image->depth == system_visual->depth);
	      QTEST (image->bpp >= (image->depth-1)/8 + 1);
	      QTEST (image->mem != NULL);
	      gdk_image_destroy (image);
	    }
	}
  TEST (retval);
}

/* Test creating temp windows.
 */
static void
test_temp_windows (void)
{
  GdkWindow *window;
  GdkWindowAttr wa;
  GdkVisual *visual;
  gint width, height;
  gint w, h, x, y, d;
  gboolean retval = TRUE;

  wa.window_type = GDK_WINDOW_TEMP;
  wa.wclass = GDK_INPUT_OUTPUT;

  for (width = 1; width <= 64; width += 4)
    for (height = 1; height <= 32; height += 7)
      {
	wa.width = width;
	wa.height = height;
	window = gdk_window_new (NULL, &wa, 0);
	ASSERT (window != NULL);
	gdk_window_get_geometry (window, &x, &y, &w, &h, &d);
	QTESTF (w == width, ("w:%d", w));
	QTESTF (h == height, ("h:%d", h));
	gdk_window_show (window);
	gdk_window_get_geometry (window, &x, &y, &w, &h, &d);
	QTESTF (w == width, ("w:%d", w));
	QTESTF (h == height, ("h:%d", h));
	gdk_window_resize (window, 37, 19);
	gdk_window_get_geometry (window, &x, &y, &w, &h, &d);
	QTESTF (w == 37, ("w:%d", w));
	QTESTF (h == 19, ("h:%d", h));
	visual = gdk_window_get_visual (window);
	QTEST (visual == system_visual);
	gdk_window_hide (window);
	gdk_window_unref (window);
      }
  TEST (retval);
}

static void
test_gc_function (GdkFunction function,
            guint32     oldpixel,
            guint32     newpixel,
            guint32     foreground,
            guint32     mask)
{
  switch (function)
    {
    case GDK_COPY:
      QTEST (newpixel == (foreground & mask)); break;
    case GDK_INVERT:
      QTEST (newpixel == ((~oldpixel) & mask)); break;
    case GDK_XOR:
      QTEST (newpixel == ((oldpixel ^ foreground) & mask)); break;
    case GDK_CLEAR:
      QTEST (newpixel == 0); break;
    case GDK_AND:
      QTEST (newpixel == ((oldpixel & foreground) & mask)); break;
    case GDK_AND_REVERSE:
      QTEST (newpixel == (((~oldpixel) & foreground) & mask)); break;
    case GDK_AND_INVERT:
      QTEST (newpixel == ((oldpixel & (~foreground)) & mask)); break;
    case GDK_NOOP:
      QTEST (newpixel == (oldpixel & mask)); break;
    case GDK_OR:
      QTEST (newpixel == ((oldpixel | foreground) & mask)); break;
    case GDK_EQUIV:
      QTEST (newpixel == ((oldpixel ^ (~foreground)) & mask)); break;
    case GDK_OR_REVERSE:
      QTEST (newpixel == (((~oldpixel) | foreground) & mask)); break;
    case GDK_COPY_INVERT:
      QTEST (newpixel == ((~foreground) & mask)); break;
    case GDK_OR_INVERT:
      QTEST (newpixel == ((oldpixel | (~foreground)) & mask)); break;
    case GDK_NAND:
      QTEST (newpixel == (((~oldpixel) | (~foreground)) & mask)); break;
    case GDK_NOR:
      QTEST (newpixel == (~oldpixel & ~mask)); break;
    case GDK_SET:
      QTEST (newpixel == ((~0) & mask)); break;
    default:
      ASSERT (FALSE);
    }
}

static void
test_one_point_on_drawable (GdkDrawable *drawable,
                   GdkGC       *gc,
                   int          depth)
{
  GdkImage *image;
  GdkGCValues gcvalues;
  gint xoff, yoff;
  guint32 oldpixels[3][3], newpixel, mask;
  const gint x = 4;
  const gint y = 5;

  gdk_gc_get_values (gc, &gcvalues);

  image = gdk_image_get (drawable, x+-1, y+-1, 3, 3);
  QTEST (image != NULL);
  for (xoff = -1; xoff <= 1; xoff++)
    for (yoff = -1; yoff <= 1; yoff++)
      {
	oldpixels[xoff+1][yoff+1] = gdk_image_get_pixel (image, xoff+1, yoff+1);
      }
  gdk_image_destroy (image);

  if (depth == 32)
    mask = 0xFFFFFFFF;
  else
    mask = (1 << depth) - 1;

  gdk_draw_point (drawable, gc, x, y);

  image = gdk_image_get (drawable, x-1, y-1, 3, 3);
  QTEST (image != NULL);
  for (xoff = -1; xoff <= 1; xoff++)
    for (yoff = -1; yoff <= 1; yoff++)
      {
	newpixel = gdk_image_get_pixel (image, xoff+1, yoff+1);
	if (xoff == 0 && yoff == 0)
	  test_gc_function (gcvalues.function, oldpixels[1][1], newpixel,
			    gcvalues.foreground.pixel, mask);
	else
	  QTEST (newpixel == oldpixels[xoff+1][yoff+1]);
      }
  gdk_image_destroy (image);
}


/* Test drawing points.
 */
static void
test_points (void)
{
  GdkPixmap *pixmap;
  GdkWindow *window;
  GdkFunction function;
  gint width, height;
  int i, j;

  width = 8;
  height = 8;
  pixmap = gdk_pixmap_new (w, width, height, -1);

  for (i = 0; i < N(gcs); i++)
    for (j = 0; j < N(gcs); j++)
      for (function = GDK_COPY; function <= GDK_SET; function++)
	{
	  gdk_draw_rectangle (pixmap, gcs[i], TRUE, 0, 0, width, height);
	  gdk_gc_set_function (gcs[j], function);
	  test_one_point_on_drawable (pixmap, gcs[j], system_visual->depth);
	  gdk_gc_set_function (gcs[j], GDK_COPY);
	}
  
  g_object_unref (pixmap);
  
  pixmap = gdk_pixmap_new (w, width, height, 1);
  test_one_point_on_drawable (pixmap, black_bitmap_gc, 1);
  for (function = GDK_COPY; function <= GDK_SET; function++)
    {
      gdk_gc_set_function (black_bitmap_gc, function);
      test_one_point_on_drawable (pixmap, black_bitmap_gc, 1);
    }

  g_object_unref (pixmap);
}

static void
test_one_line_on_drawable (GdkDrawable *drawable,
                  GdkGC       *gc,
                  int          depth,
                  gboolean     horisontal)
{
  GdkImage *oldimage, *newimage;
  GdkGCValues gcvalues;
  gint line_width;
  gint w, h;
  gint w_up, w_down, w_left, w_right;
  gint x, y;
  guint32 oldpixel, newpixel, mask;

  gdk_gc_get_values (gc, &gcvalues);
  line_width = gcvalues.line_width > 0 ? gcvalues.line_width : 1;
  w_up = w_left = line_width/2;
  w_down = w_right = (line_width & 1) ? line_width/2 : line_width/2-1;
  gdk_window_get_size (drawable, &w, &h);
  oldimage = gdk_image_get (drawable, 0, 0, w, h);

  if (depth == 32)
    mask = 0xFFFFFFFF;
  else
    mask = (1 << depth) - 1;

  if (horisontal)
    {
      const gint x1 = 10;
      const gint y1 = 10;
      const gint x2 = 13;
      const gint y2 = y1;

      gdk_draw_line (drawable, gc, x1, y1, x2, y2);
      newimage = gdk_image_get (drawable, 0, 0, w, h);
      for (x = x1-1; x <= x2+1; x++)
	for (y = y1-w_up-1; y <= y1+w_down+1; y++)
	  {
	    oldpixel = gdk_image_get_pixel (oldimage, x, y);
	    newpixel = gdk_image_get_pixel (newimage, x, y);
	    if (x >= x1 && x < x2 && y >= y1-w_up && y <= y1+w_down)
	      test_gc_function (gcvalues.function, oldpixel, newpixel,
				gcvalues.foreground.pixel, mask);
	    else
	      QTEST (oldpixel == newpixel);
	  }
    }
  else /* vertical */
    {
      const gint x1 = 10;
      const gint y1 = 10;
      const gint x2 = 10;
      const gint y2 = 13;

      gdk_draw_line (drawable, gc, x1, y1, x2, y2);
      newimage = gdk_image_get (drawable, 0, 0, w, h);
      for (x = x1-w_left-1; x <= x1+w_right+1; x++)
	for (y = y1-1; y <= y2+1; y++)
	  {
	    oldpixel = gdk_image_get_pixel (oldimage, x, y);
	    newpixel = gdk_image_get_pixel (newimage, x, y);
	    if (x >= x1-w_left && x <= x1+w_right && y >= y1 && y < y2)
	      test_gc_function (gcvalues.function, oldpixel, newpixel,
				gcvalues.foreground.pixel, mask);
	    else
	      QTEST (oldpixel == newpixel);
	  }
    }
  
  gdk_image_destroy (oldimage);
  gdk_image_destroy (newimage);
}

/* Test drawing lines.
 */
static void
test_lines (void)
{
  GdkPixmap *pixmap;
  GdkFunction function;
  gint width;
  int i, j;
  gboolean horisontal = TRUE;

  pixmap = gdk_pixmap_new (w, 30, 30, -1);

  for (i = 0; i < N(gcs); i++)
    for (j = 0; j < N(gcs); j++)
      for (function = GDK_COPY; function <= GDK_SET; function++)
	for (width = 1; width <= 4; width++)
	  {
	    gdk_draw_rectangle (pixmap, gcs[i], TRUE, 0, 0, 30, 30);
	    gdk_gc_set_function (gcs[j], function);
	    gdk_gc_set_line_attributes (gcs[j], width,
					GDK_LINE_SOLID, GDK_CAP_BUTT, GDK_JOIN_MITER);
	    test_one_line_on_drawable (pixmap, gcs[j], system_visual->depth,
				       horisontal);
	    /* Toggle between horisontal and vertical... */
	    horisontal = !horisontal;
	    gdk_gc_set_function (gcs[j], GDK_COPY);
	  }

  g_object_unref (pixmap);
}

static void
test_one_rectangle_on_drawable (GdkDrawable *drawable,
                    GdkGC       *gc,
                    int          depth,
                    gboolean     filled)
{
  GdkImage *oldimage, *newimage;
  GdkGCValues gcvalues;
  gint line_width;
  gint w, h;
  gint w_up, w_down, w_left, w_right;
  gint x, y;
  guint32 oldpixel, newpixel, mask;
  const gint x0 = 10;
  const gint y0 = 13;
  const gint width = 7;
  const gint height = 9;

  gdk_gc_get_values (gc, &gcvalues);

  if (!filled)
    {
      line_width = gcvalues.line_width > 0 ? gcvalues.line_width : 1;
      w_up = w_left = line_width/2;
      w_down = w_right = (line_width & 1) ? line_width/2 : line_width/2-1;
    }

  gdk_window_get_size (drawable, &w, &h);
  oldimage = gdk_image_get (drawable, 0, 0, w, h);

  if (depth == 32)
    mask = 0xFFFFFFFF;
  else
    mask = (1 << depth) - 1;

  gdk_draw_rectangle (drawable, gc, filled, x0, y0, width, height);
  newimage = gdk_image_get (drawable, 0, 0, w, h);

  for (x = x0 - 1; x <= x0 + width + 1; x++)
    for (y = y0 - 1; y < y0 + height + 1; y++)
      {
	oldpixel = gdk_image_get_pixel (oldimage, x, y);
	newpixel = gdk_image_get_pixel (newimage, x, y);
	
	if (filled)
	  {
	    if (x >= x0 && x < x0+width &&
		y >= y0 && y < y0+height)
	      test_gc_function (gcvalues.function, oldpixel, newpixel,
				gcvalues.foreground.pixel, mask);
	    else
	      QTEST (oldpixel == newpixel);
	  }
	else
	  {
	    if ((x >= x0-w_left && x <= x0+width+w_right &&
		 y >= y0-w_up && y <= y0+w_down) ||
		(x >= x0-w_left && x <= x0+width+w_right &&
		 y >= y0+height-w_up && y <= y0+height+w_down) ||
		(x >= x0-w_left && x <= x0+w_right &&
		 y >= y0-w_up && y <= y0+height+w_down) ||
		(x >= x0+width-w_left && x <= x0+width+w_right &&
		 y >= y0-w_up && y <= y0+height+w_down))
	      test_gc_function (gcvalues.function, oldpixel, newpixel,
				gcvalues.foreground.pixel, mask);
	    else
	      QTEST (oldpixel == newpixel);
	  }
      }
  
  gdk_image_destroy (oldimage);
  gdk_image_destroy (newimage);
}

/* Test drawing rectangles.
 */
static void
test_rectangles (void)
{
  GdkPixmap *pixmap;
  GdkFunction function;
  gint width;
  int i, j;
  gboolean filled = FALSE;

  pixmap = gdk_pixmap_new (w, 30, 30, -1);

  for (i = 0; i < N(gcs); i++)
    for (j = 0; j < N(gcs); j++)
      for (function = GDK_COPY; function <= GDK_SET; function++)
	for (width = 1; width <= 4; width++)
	  {
	    gdk_draw_rectangle (pixmap, gcs[i], TRUE, 0, 0, 30, 30);
	    gdk_gc_set_function (gcs[j], function);
	    gdk_gc_set_line_attributes (gcs[j], width,
					GDK_LINE_SOLID, GDK_CAP_BUTT, GDK_JOIN_MITER);
	    test_one_rectangle_on_drawable (pixmap, gcs[j],
					    system_visual->depth, filled);
	    filled = !filled;
	    gdk_gc_set_function (gcs[j], GDK_COPY);
	  }
  
  g_object_unref (pixmap);
}

static void
test_some_arcs_on_drawable (GdkDrawable *drawable,
                   GdkGC       *gc,
                   int          depth,
                   gboolean     filled)
{
  GdkImage *oldimage, *newimage;
  GdkGCValues gcvalues;
  gint line_width;
  gint w, h;
  gint w_up, w_down, w_left, w_right;
  gint x, y;
  guint32 oldpixel, newpixel, mask;
  /* XXX */
  const gint x0 = 10;
  const gint y0 = 13;
  const gint width = 7;
  const gint height = 9;

  gdk_gc_get_values (gc, &gcvalues);

  if (!filled)
    {
      line_width = gcvalues.line_width > 0 ? gcvalues.line_width : 1;
      w_up = w_left = line_width/2;
      w_down = w_right = (line_width & 1) ? line_width/2 : line_width/2-1;
    }

  gdk_window_get_size (drawable, &w, &h);
  oldimage = gdk_image_get (drawable, 0, 0, w, h);

  if (depth == 32)
    mask = 0xFFFFFFFF;
  else
    mask = (1 << depth) - 1;

  /* XXX */
  newimage = gdk_image_get (drawable, 0, 0, w, h);

  for (x = x0 - 1; x <= x0 + width + 1; x++)
    for (y = y0 - 1; y < y0 + height + 1; y++)
      {
	oldpixel = gdk_image_get_pixel (oldimage, x, y);
	newpixel = gdk_image_get_pixel (newimage, x, y);
	
	if (filled)
	  {
	    /* XXX */
	  }
	else
	  {
	    /* XXX */
	  }
      }
  
  gdk_image_destroy (oldimage);
  gdk_image_destroy (newimage);
}

/* Test drawing arcs. Results don't have to be exactly as on X11,
 * but "close".
 */
static void
test_arcs (void)
{
  GdkPixmap *pixmap;
  GdkFunction function;
  gint width;
  int i, j;
  gboolean filled = FALSE;

  pixmap = gdk_pixmap_new (w, 30, 30, -1);

  for (i = 0; i < N(gcs); i++)
    for (j = 0; j < N(gcs); j++)
      for (function = GDK_COPY; function <= GDK_SET; function++)
	for (width = 1; width <= 4; width++)
	  {
	    gdk_draw_rectangle (pixmap, gcs[i], TRUE, 0, 0, 30, 30);
	    gdk_gc_set_function (gcs[j], function);
	    gdk_gc_set_line_attributes (gcs[j], width,
					GDK_LINE_SOLID, GDK_CAP_BUTT, GDK_JOIN_MITER);
	    test_some_arcs_on_drawable (pixmap, gcs[j], system_visual->depth,
					filled);
	    filled = !filled;
	    gdk_gc_set_function (gcs[j], GDK_COPY);
	  }

  g_object_unref (pixmap);
}

/* Test region operations.
 */
static void
test_regions (void)
{
}

static void
tests (void)
{
  srand (time (NULL));

  test_visuals ();
  test_first_window ();
  test_colourmaps ();
  test_colours ();
  test_gcs ();
  test_pixmaps (1);
  test_pixmaps (system_visual->depth);
  if (best_visual->depth != system_visual->depth)
    test_pixmaps (best_visual->depth);
  test_images ();
  test_temp_windows ();
  test_points ();
  test_lines ();
  test_rectangles ();
  test_arcs ();
  test_regions ();
}

int
main (int argc, char **argv)
{
  GLogLevelFlags fatal_mask;

  gdk_init (&argc, &argv);

  fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
  fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
  g_log_set_always_fatal (fatal_mask);

  tests ();

  return return_value;
}