Initial revision

1 files changed, 431 insertions, 0 deletions

diff --git a/gdk/gdkvisual.c b/gdk/gdkvisual.c
new file mode 100644
index 0000000000..22acee6f13
--- /dev/null
+++ b/gdk/gdkvisual.c
@@ -0,0 +1,431 @@
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * 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, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include "gdk.h"
+#include "gdkprivate.h"
+
+
+static void  gdk_visual_add            (GdkVisual *visual);
+static void  gdk_visual_decompose_mask (gulong     mask,
+					gint      *shift,
+					gint      *prec);
+static guint gdk_visual_hash           (Visual    *key);
+static gint  gdk_visual_compare        (Visual    *a,
+					Visual    *b);
+
+
+static GdkVisualPrivate *system_visual;
+static GdkVisualPrivate *visuals;
+static gint nvisuals;
+
+static gint available_depths[4];
+static gint navailable_depths;
+
+static GdkVisualType available_types[6];
+static gint navailable_types;
+
+static char* visual_names[] =
+{
+  "static gray",
+  "grayscale",
+  "static color",
+  "pseudo color",
+  "true color",
+  "direct color",
+};
+
+static GHashTable *visual_hash = NULL;
+
+void
+gdk_visual_init ()
+{
+  static gint possible_depths[5] = { 32, 24, 16, 15, 8 };
+  static GdkVisualType possible_types[6] =
+    {
+      GDK_VISUAL_DIRECT_COLOR,
+      GDK_VISUAL_TRUE_COLOR,
+      GDK_VISUAL_PSEUDO_COLOR,
+      GDK_VISUAL_STATIC_COLOR,
+      GDK_VISUAL_GRAYSCALE,
+      GDK_VISUAL_STATIC_GRAY
+    };
+
+  static gint npossible_depths = 5;
+  static gint npossible_types = 6;
+
+  XVisualInfo *visual_list;
+  XVisualInfo visual_template;
+  GdkVisualPrivate temp_visual;
+  Visual *default_xvisual;
+  int nxvisuals;
+  int i, j;
+
+  visual_template.screen = gdk_screen;
+  visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
+  visuals = g_new (GdkVisualPrivate, nxvisuals);
+
+  default_xvisual = DefaultVisual (gdk_display, gdk_screen);
+
+  nvisuals = 0;
+  for (i = 0; i < nxvisuals; i++)
+    {
+      if (visual_list[i].depth >= 8)
+	{
+#ifdef __cplusplus
+	  switch (visual_list[i].c_class)
+#else /* __cplusplus */
+	  switch (visual_list[i].class)
+#endif /* __cplusplus */
+	    {
+	    case StaticGray:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
+	      break;
+	    case GrayScale:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
+	      break;
+	    case StaticColor:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
+	      break;
+	    case PseudoColor:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
+	      break;
+	    case TrueColor:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
+	      break;
+	    case DirectColor:
+	      visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
+	      break;
+	    }
+
+	  visuals[nvisuals].visual.depth = visual_list[i].depth;
+	  visuals[nvisuals].visual.byte_order =
+	    (ImageByteOrder(gdk_display) == LSBFirst) ?
+	    GDK_LSB_FIRST : GDK_MSB_FIRST;
+	  visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
+	  visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
+	  visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
+	  visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
+	  visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
+	  visuals[nvisuals].xvisual = visual_list[i].visual;
+
+	  if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
+	      (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
+	    {
+	      gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
+					 &visuals[nvisuals].visual.red_shift,
+					 &visuals[nvisuals].visual.red_prec);
+
+	      gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
+					 &visuals[nvisuals].visual.green_shift,
+					 &visuals[nvisuals].visual.green_prec);
+
+	      gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
+					 &visuals[nvisuals].visual.blue_shift,
+					 &visuals[nvisuals].visual.blue_prec);
+	    }
+	  else
+	    {
+	      visuals[nvisuals].visual.red_mask = 0;
+	      visuals[nvisuals].visual.red_shift = 0;
+	      visuals[nvisuals].visual.red_prec = 0;
+
+	      visuals[nvisuals].visual.green_mask = 0;
+	      visuals[nvisuals].visual.green_shift = 0;
+	      visuals[nvisuals].visual.green_prec = 0;
+
+	      visuals[nvisuals].visual.blue_mask = 0;
+	      visuals[nvisuals].visual.blue_shift = 0;
+	      visuals[nvisuals].visual.blue_prec = 0;
+	    }
+
+	  nvisuals += 1;
+	}
+    }
+
+  XFree (visual_list);
+
+  for (i = 0; i < nvisuals; i++)
+    {
+      for (j = i+1; j < nvisuals; j++)
+	{
+	  if (visuals[j].visual.depth >= visuals[i].visual.depth)
+	    {
+	      if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
+		{
+		  if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
+		    {
+		      temp_visual = visuals[j];
+		      visuals[j] = visuals[i];
+		      visuals[i] = temp_visual;
+		    }
+		  else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
+			   visuals[j].visual.type > visuals[i].visual.type)
+		    {
+		      temp_visual = visuals[j];
+		      visuals[j] = visuals[i];
+		      visuals[i] = temp_visual;
+		    }
+		}
+	      else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
+		       ((visuals[j].visual.depth == visuals[i].visual.depth) &&
+			(visuals[j].visual.type > visuals[i].visual.type)))
+		{
+		  temp_visual = visuals[j];
+		  visuals[j] = visuals[i];
+		  visuals[i] = temp_visual;
+		}
+	    }
+	}
+    }
+
+  for (i = 0; i < nvisuals; i++)
+    if (default_xvisual->visualid == visuals[i].xvisual->visualid)
+      {
+	system_visual = &visuals[i];
+	break;
+      }
+
+  if (gdk_debug_level >= 1)
+    for (i = 0; i < nvisuals; i++)
+      g_print ("visual: %s: %d\n",
+	       visual_names[visuals[i].visual.type],
+	       visuals[i].visual.depth);
+
+  navailable_depths = 0;
+  for (i = 0; i < npossible_depths; i++)
+    {
+      for (j = 0; j < nvisuals; j++)
+	{
+	  if (visuals[j].visual.depth == possible_depths[i])
+	    {
+	      available_depths[navailable_depths++] = visuals[j].visual.depth;
+	      break;
+	    }
+	}
+    }
+
+  if (navailable_depths == 0)
+    g_error ("unable to find a usable depth");
+
+  navailable_types = 0;
+  for (i = 0; i < npossible_types; i++)
+    {
+      for (j = 0; j < nvisuals; j++)
+	{
+	  if (visuals[j].visual.type == possible_types[i])
+	    {
+	      available_types[navailable_types++] = visuals[j].visual.type;
+	      break;
+	    }
+	}
+    }
+
+  for (i = 0; i < nvisuals; i++)
+    gdk_visual_add ((GdkVisual*) &visuals[i]);
+
+  if (npossible_types == 0)
+    g_error ("unable to find a usable visual type");
+}
+
+GdkVisual*
+gdk_visual_ref (GdkVisual *visual)
+{
+  return visual;
+}
+
+void
+gdk_visual_unref (GdkVisual *visual)
+{
+  return;
+}
+
+gint
+gdk_visual_get_best_depth ()
+{
+  return available_depths[0];
+}
+
+GdkVisualType
+gdk_visual_get_best_type ()
+{
+  return available_types[0];
+}
+
+GdkVisual*
+gdk_visual_get_system ()
+{
+  return ((GdkVisual*) system_visual);
+}
+
+GdkVisual*
+gdk_visual_get_best ()
+{
+  return ((GdkVisual*) &(visuals[0]));
+}
+
+GdkVisual*
+gdk_visual_get_best_with_depth (gint depth)
+{
+  GdkVisual *return_val;
+  int i;
+
+  return_val = NULL;
+  for (i = 0; i < nvisuals; i++)
+    if (depth == visuals[i].visual.depth)
+      {
+	return_val = (GdkVisual*) &(visuals[i]);
+	break;
+      }
+
+  return return_val;
+}
+
+GdkVisual*
+gdk_visual_get_best_with_type (GdkVisualType visual_type)
+{
+  GdkVisual *return_val;
+  int i;
+
+  return_val = NULL;
+  for (i = 0; i < nvisuals; i++)
+    if (visual_type == visuals[i].visual.type)
+      {
+	return_val = (GdkVisual*) &(visuals[i]);
+	break;
+      }
+
+  return return_val;
+}
+
+GdkVisual*
+gdk_visual_get_best_with_both (gint          depth,
+			       GdkVisualType visual_type)
+{
+  GdkVisual *return_val;
+  int i;
+
+  return_val = NULL;
+  for (i = 0; i < nvisuals; i++)
+    if ((depth == visuals[i].visual.depth) &&
+	(visual_type == visuals[i].visual.type))
+      {
+	return_val = (GdkVisual*) &(visuals[i]);
+	break;
+      }
+
+  return return_val;
+}
+
+void
+gdk_query_depths  (gint **depths,
+		   gint  *count)
+{
+  *count = navailable_depths;
+  *depths = available_depths;
+}
+
+void
+gdk_query_visual_types (GdkVisualType **visual_types,
+			gint           *count)
+{
+  *count = navailable_types;
+  *visual_types = available_types;
+}
+
+void
+gdk_query_visuals (GdkVisual **visual_return,
+		   gint       *count)
+{
+  *count = nvisuals;
+  *visual_return = (GdkVisual*) visuals;
+}
+
+
+GdkVisual*
+gdk_visual_lookup (Visual *xvisual)
+{
+  GdkVisual *visual;
+
+  if (!visual_hash)
+    return NULL;
+
+  visual = g_hash_table_lookup (visual_hash, xvisual);
+  return visual;
+}
+
+GdkVisual*
+gdkx_visual_get (VisualID xvisualid)
+{
+  int i;
+
+  for (i = 0; i < nvisuals; i++)
+    if (xvisualid == visuals[i].xvisual->visualid)
+      return (GdkVisual*) &visuals[i];
+
+  return NULL;
+}
+
+
+static void
+gdk_visual_add (GdkVisual *visual)
+{
+  GdkVisualPrivate *private;
+
+  if (!visual_hash)
+    visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
+				    (GCompareFunc) gdk_visual_compare);
+
+  private = (GdkVisualPrivate*) visual;
+
+  g_hash_table_insert (visual_hash, private->xvisual, visual);
+}
+
+static void
+gdk_visual_decompose_mask (gulong  mask,
+			   gint   *shift,
+			   gint   *prec)
+{
+  *shift = 0;
+  *prec = 0;
+
+  while (!(mask & 0x1))
+    {
+      (*shift)++;
+      mask >>= 1;
+    }
+
+  while (mask & 0x1)
+    {
+      (*prec)++;
+      mask >>= 1;
+    }
+}
+
+static guint
+gdk_visual_hash (Visual *key)
+{
+  return key->visualid;
+}
+
+static gint
+gdk_visual_compare (Visual *a,
+		    Visual *b)
+{
+  return (a->visualid == b->visualid);
+}