gtk/gdk/linux-fb/gdkdrawable-fb2.c

#include "gdkprivate-fb.h"
#include "mi.h"

#include <freetype/ftglyph.h>

#include <string.h>

#ifndef g_alloca
#define g_alloca alloca
#endif

typedef enum {
  GPR_USED_BG,
  GPR_AA_GRAYVAL,
  GPR_NONE,
  GPR_ERR_BOUNDS
} GetPixelRet;

static void         gdk_fb_drawable_set_pixel (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       int               x,
					       int               y,
					       GdkColor         *spot,
					       gboolean          abs_coords);
static GetPixelRet  gdk_fb_drawable_get_pixel (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       int               x,
					       int               y,
					       GdkColor         *spot,
					       gboolean          abs_coords,
					       GdkDrawable      *bg_relto,
					       GdkDrawable      *bgpm);
void                gdk_fb_draw_rectangle     (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       gint              filled,
					       gint              x,
					       gint              y,
					       gint              width,
					       gint              height);
static void         gdk_fb_draw_arc           (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       gint              filled,
					       gint              x,
					       gint              y,
					       gint              width,
					       gint              height,
					       gint              angle1,
					       gint              angle2);
static void         gdk_fb_draw_polygon       (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       gint              filled,
					       GdkPoint         *points,
					       gint              npoints);
static void         gdk_fb_draw_text          (GdkDrawable      *drawable,
					       GdkFont          *font,
					       GdkGC            *gc,
					       gint              x,
					       gint              y,
					       const gchar      *text,
					       gint              text_length);
static void         gdk_fb_draw_text_wc       (GdkDrawable      *drawable,
					       GdkFont          *font,
					       GdkGC            *gc,
					       gint              x,
					       gint              y,
					       const GdkWChar   *text,
					       gint              text_length);
static void         gdk_fb_draw_glyphs        (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       PangoFont        *font,
					       gint              x,
					       gint              y,
					       PangoGlyphString *glyphs);
void                gdk_fb_draw_drawable      (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       GdkPixmap        *src,
					       gint              xsrc,
					       gint              ysrc,
					       gint              xdest,
					       gint              ydest,
					       gint              width,
					       gint              height);
static void         gdk_fb_draw_image         (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       GdkImage         *image,
					       gint              xsrc,
					       gint              ysrc,
					       gint              xdest,
					       gint              ydest,
					       gint              width,
					       gint              height);
static void         gdk_fb_draw_points        (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       GdkPoint         *points,
					       gint              npoints);
static void         gdk_fb_draw_segments      (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       GdkSegment       *segs,
					       gint              nsegs);
static void         gdk_fb_draw_lines         (GdkDrawable      *drawable,
					       GdkGC            *gc,
					       GdkPoint         *points,
					       gint              npoints);
static GdkColormap* gdk_fb_get_colormap       (GdkDrawable      *drawable);
static void         gdk_fb_set_colormap       (GdkDrawable      *drawable,
					       GdkColormap      *colormap);
static gint         gdk_fb_get_depth          (GdkDrawable      *drawable);
static GdkVisual*   gdk_fb_get_visual         (GdkDrawable      *drawable);


static gpointer parent_class = NULL;

static void
gdk_fb_get_size (GdkDrawable *d, gint *width, gint *height)
{
  if (width)
    *width = GDK_DRAWABLE_FBDATA (d)->width;
  if (height)
    *height = GDK_DRAWABLE_FBDATA (d)->height;
}

static void
gdk_drawable_impl_fb_class_init (GdkDrawableFBClass *klass)
{
  GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);

  parent_class = g_type_class_peek_parent (klass);

  drawable_class->create_gc = _gdk_fb_gc_new;
  drawable_class->draw_rectangle = gdk_fb_draw_rectangle;
  drawable_class->draw_arc = gdk_fb_draw_arc;
  drawable_class->draw_polygon = gdk_fb_draw_polygon;
  drawable_class->draw_text = gdk_fb_draw_text;
  drawable_class->draw_text_wc = gdk_fb_draw_text_wc;
  drawable_class->draw_drawable = gdk_fb_draw_drawable;
  drawable_class->draw_points = gdk_fb_draw_points;
  drawable_class->draw_segments = gdk_fb_draw_segments;
  drawable_class->draw_lines = gdk_fb_draw_lines;
  drawable_class->draw_glyphs = gdk_fb_draw_glyphs;
  drawable_class->draw_image = gdk_fb_draw_image;
  
  drawable_class->set_colormap = gdk_fb_set_colormap;
  drawable_class->get_colormap = gdk_fb_get_colormap;
  
  drawable_class->get_size = gdk_fb_get_size;
 
  drawable_class->get_depth = gdk_fb_get_depth;
  drawable_class->get_visual = gdk_fb_get_visual;
  
  drawable_class->get_image = _gdk_fb_get_image;
}

GType
gdk_drawable_impl_fb_get_type (void)
{
  static GType object_type = 0;

  if (!object_type)
    {
      static const GTypeInfo object_info =
      {
        sizeof (GdkDrawableFBClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) gdk_drawable_impl_fb_class_init,
        NULL,           /* class_finalize */
        NULL,           /* class_data */
        sizeof (GdkDrawableFBData),
        0,              /* n_preallocs */
        (GInstanceInitFunc) NULL,
      };
      
      object_type = g_type_register_static (GDK_TYPE_DRAWABLE,
                                            "GdkDrawableFB",
                                            &object_info,
					    0);
    }
  
  return object_type;
}

/*****************************************************
 * FB specific implementations of generic functions *
 *****************************************************/

static GdkColormap*
gdk_fb_get_colormap (GdkDrawable *drawable)
{
  GdkColormap *retval = GDK_DRAWABLE_FBDATA (drawable)->colormap;

  if (!retval)
    retval = gdk_colormap_get_system ();

  return retval;
}

static void
gdk_fb_set_colormap (GdkDrawable *drawable,
		     GdkColormap *colormap)
{
  GdkColormap *old_cmap;
  GdkDrawableFBData *private;

  private = GDK_DRAWABLE_FBDATA (drawable);
  
  old_cmap = private->colormap;
  private->colormap = gdk_colormap_ref (colormap);
  gdk_colormap_unref (old_cmap);
}

/* Calculates the real clipping region for a drawable, taking into account
 * other windows, gc clip region and gc clip mask.
 */
GdkRegion *
gdk_fb_clip_region (GdkDrawable *drawable,
		    GdkGC *gc,
		    gboolean do_clipping,
		    gboolean do_children)
{
  GdkRectangle draw_rect;
  GdkRegion *real_clip_region, *tmpreg;
  gboolean skipit = FALSE;
  GdkDrawableFBData *private;

  private = GDK_DRAWABLE_FBDATA (drawable);
  
  g_assert(!GDK_IS_WINDOW (private->wrapper) ||
	   !GDK_WINDOW_P (private->wrapper)->input_only);
  
  draw_rect.x = private->llim_x;
  draw_rect.y = private->llim_y;
  if (!GDK_IS_WINDOW (private) ||
      GDK_WINDOW_P (private->wrapper)->mapped)
    {
      draw_rect.width = private->lim_x - draw_rect.x;
      draw_rect.height = private->lim_y - draw_rect.y;
    }
  else
    {
      draw_rect.width = draw_rect.height = 0;
      skipit = TRUE;
    }
  real_clip_region = gdk_region_rectangle (&draw_rect);
  if (skipit)
    return real_clip_region;

  if (gc && GDK_GC_FBDATA(gc)->values.subwindow_mode == GDK_INCLUDE_INFERIORS)
    do_children = FALSE;

  if (do_clipping &&
      GDK_IS_WINDOW (private->wrapper) &&
      GDK_WINDOW_P (private->wrapper)->mapped &&
      !GDK_WINDOW_P (private->wrapper)->input_only)
    {
      GdkWindow *parentwin, *lastwin;
      GdkDrawableFBData *impl_private;

      lastwin = private->wrapper;
      if (do_children)
	parentwin = lastwin;
      else
	parentwin = (GdkWindow *)GDK_WINDOW_P (lastwin)->parent;

      for (; parentwin; lastwin = parentwin, parentwin = (GdkWindow *)GDK_WINDOW_P (parentwin)->parent)
	{
	  GList *cur;

	  for (cur = GDK_WINDOW_P (parentwin)->children; cur && cur->data != lastwin; cur = cur->next)
	    {
	      if (!GDK_WINDOW_P (cur->data)->mapped || GDK_WINDOW_P (cur->data)->input_only)
		continue;

	      impl_private = GDK_DRAWABLE_IMPL_FBDATA(cur->data);
	      draw_rect.x = impl_private->llim_x;
	      draw_rect.y = impl_private->llim_y;
	      draw_rect.width = impl_private->lim_x - draw_rect.x;
	      draw_rect.height = impl_private->lim_y - draw_rect.y;

	      tmpreg = gdk_region_rectangle (&draw_rect);

	      gdk_region_subtract (real_clip_region, tmpreg);
	      gdk_region_destroy (tmpreg);
	    }
	}
    }

  if (gc)
    {
      if (GDK_GC_FBDATA (gc)->clip_region)
	{
	  tmpreg = gdk_region_copy (GDK_GC_FBDATA (gc)->clip_region);
	  gdk_region_offset (tmpreg, private->abs_x + GDK_GC_P (gc)->clip_x_origin,
			     private->abs_y + GDK_GC_P (gc)->clip_y_origin);
	  gdk_region_intersect (real_clip_region, tmpreg);
	  gdk_region_destroy (tmpreg);
	}

      if (GDK_GC_FBDATA (gc)->values.clip_mask)
	{
	  GdkDrawable *cmask = GDK_GC_FBDATA (gc)->values.clip_mask;
	  GdkDrawableFBData *cmask_private;

	  cmask_private = GDK_DRAWABLE_IMPL_FBDATA (cmask);

	  g_assert (cmask_private->depth == 1);
	  g_assert (cmask_private->abs_x == 0 &&
		    cmask_private->abs_y == 0);

	  draw_rect.x = private->abs_x +
	                cmask_private->llim_x +
	                GDK_GC_FBDATA (gc)->values.clip_x_origin;
	  
	  draw_rect.y = private->abs_y +
	                cmask_private->llim_y +
	                GDK_GC_FBDATA (gc)->values.clip_y_origin;
	  
	  draw_rect.width = cmask_private->width;
	  draw_rect.height = cmask_private->height;

	  tmpreg = gdk_region_rectangle (&draw_rect);
	  gdk_region_intersect (real_clip_region, tmpreg);
	  gdk_region_destroy (tmpreg);
	  if (!real_clip_region->numRects)
	    g_warning ("Empty clip region");
	}
    }

  return real_clip_region;
}

static void
gdk_fb_fill_span (GdkDrawable *drawable,
		  GdkGC       *gc,
		  GdkSegment  *cur,
		  GdkColor    *color,
		  GdkVisual   *visual)
{
  int curx, cury;
  GdkColor spot = *color;
  GdkGCFBData *gc_private;
  GdkDrawableFBData *private;

  private = GDK_DRAWABLE_FBDATA (drawable);
  gc_private = GDK_GC_FBDATA (gc);
  
  if (gc &&
      (gc_private->values.clip_mask ||
       gc_private->values.tile ||
       gc_private->values.stipple ||
       gc_private->values.function == GDK_INVERT))
    {
      int clipxoff, clipyoff; /* Amounts to add to curx & cury to get x & y in clip mask */
      int tsxoff, tsyoff;
      GdkDrawable *cmask;
      guchar *clipmem;
      guint mask_rowstride;
      GdkPixmap *ts = NULL;
      GdkDrawableFBData *ts_private;
      gboolean solid_stipple;
      GdkFunction func = gc_private->values.function;

      ts_private = GDK_DRAWABLE_IMPL_FBDATA (ts);
      
      cmask = gc_private->values.clip_mask;
      clipxoff = clipyoff = tsxoff = tsyoff = 0;
      mask_rowstride = 0;
      solid_stipple = FALSE;
      clipmem = NULL;
      if (cmask)
	{
	  GdkDrawableFBData *cmask_private;

	  cmask_private = GDK_DRAWABLE_IMPL_FBDATA (cmask);
	  
	  clipmem = cmask_private->mem;
	  clipxoff = cmask_private->abs_x - gc_private->values.clip_x_origin - private->abs_x;
	  clipyoff = cmask_private->abs_y - gc_private->values.clip_y_origin - private->abs_y;
	  mask_rowstride = cmask_private->rowstride;
	}

      if (gc_private->values.fill == GDK_TILED &&
	  gc_private->values.tile)
	{
	  gint xstep, ystep;
	  gint relx, rely;
	  GdkFBDrawingContext *dc, dc_data;
	  dc = &dc_data;

	  gdk_fb_drawing_context_init (dc, drawable, gc, FALSE, TRUE);

	  ts = gc_private->values.tile;
	  for (cury = cur->y1; cury < cur->y2; cury += ystep)
	    {
	      int drawh;
	      
	      rely = cury - private->abs_y;
	      drawh = (rely + gc_private->values.ts_y_origin) % ts_private->height;
	      if (drawh < 0)
		drawh += GDK_DRAWABLE_FBDATA (ts)->height;

	      ystep = MIN (ts_private->height - drawh, cur->y2 - rely);

	      for (curx = cur->x1; curx < cur->x2; curx += xstep)
		{
		  int draww;

		  relx = curx - private->abs_x;

		  draww = (relx + gc_private->values.ts_x_origin) % ts_private->width;
		  if (draww < 0)
		    draww += ts_private->width;

		  xstep = MIN (ts_private->width - draww, cur->x2 - relx);

		  gdk_fb_draw_drawable_3 (drawable, gc, GDK_DRAWABLE_IMPL (ts),
					  dc,
					  draww, drawh,
					  relx, rely,
					  xstep, ystep);
		}
	    }

	  gdk_fb_drawing_context_finalize (dc);

	  return;
	}
      else if ((gc_private->values.fill == GDK_STIPPLED ||
		gc_private->values.fill == GDK_OPAQUE_STIPPLED) &&
	       gc_private->values.stipple)
	{
	  ts = gc_private->values.stipple;
	  tsxoff = GDK_DRAWABLE_FBDATA (ts)->abs_x - gc_private->values.ts_x_origin - private->abs_x;
	  tsyoff = GDK_DRAWABLE_FBDATA (ts)->abs_y - gc_private->values.ts_y_origin - private->abs_y;
	  solid_stipple = (gc_private->values.fill == GDK_OPAQUE_STIPPLED);
	}

      for (cury = cur->y1; cury < cur->y2; cury++)
	{
	  for (curx = cur->x1; curx < cur->x2; curx++)
	    {
	      int maskx = curx+clipxoff, masky = cury + clipyoff;
	      guchar foo;

	      if (cmask)
		{
		  foo = clipmem[masky*mask_rowstride + (maskx >> 3)];
		  
		  if (!(foo & (1 << (maskx % 8))))
		    continue;
		}

	      if (func == GDK_INVERT)
		{
		  gdk_fb_drawable_get_pixel (drawable, gc, curx, cury, &spot, TRUE, NULL, NULL);
		  spot.pixel = ~spot.pixel;
		  spot.red = ~spot.red;
		  spot.green = ~spot.green;
		  spot.blue = ~spot.blue;
		}
	      else if (ts)
		{
		  int wid = ts_private->width, hih = ts_private->height;

		  maskx = (curx+tsxoff)%wid;
		  masky = (cury+tsyoff)%hih;
		  if (maskx < 0)
		    maskx += wid;
		  if (masky < 0)
		    masky += hih;

		  foo = ts_private->mem[(maskx >> 3) + ts_private->rowstride*masky];
		  if (foo & (1 << (maskx % 8)))
		    {
		      spot = gc_private->values.foreground;
		    }
		  else if (solid_stipple)
		    {
		      spot = gc_private->values.background;
		    }
		  else
		    continue;
		}

	      gdk_fb_drawable_set_pixel (drawable, gc, curx, cury, &spot, TRUE);
	    }
	}
    }
  else
    {
      guchar *mem = private->mem, *ptr;
      guint rowstride = private->rowstride;
      int n;

      switch (private->depth)
	{
	case 1:
	  {
	    int fromx = MIN ((cur->x1+7)&(~7), cur->x2);
	    int begn = fromx - cur->x1, begoff = cur->x1 % 8, endn;
	    guchar begmask, endmask;
	    int body_end = cur->x2 & ~7;
	    int body_len = (body_end - fromx)/8;

	    begmask = ((1 << (begn + begoff)) - 1)
	      & ~((1 << (begoff)) - 1);
	    endn = cur->x2 - body_end;
	    endmask = (1 << endn) - 1;

	    for (cury = cur->y1; cury < cur->y2; cury++)
	      {
		ptr = mem + cury*rowstride + (cur->x1 >> 3);

		if (spot.pixel)
		  *ptr |= begmask;
		else
		  *ptr &= ~begmask;

		curx = fromx;

		if (curx < cur->x2)
		  {
		    ptr = mem + cury*rowstride + (curx >> 3);
		    memset (ptr, spot.pixel?0xFF:0, body_len);

		    if (endn)
		      {
			ptr = mem + cury*rowstride + (body_end >> 3);
			if (spot.pixel)
			  *ptr |= endmask;
			else
			  *ptr &= ~endmask;
		      }
		  }
	      }
	  }
	  break;
	case 8:
	  for (cury = cur->y1; cury < cur->y2; cury++)
	    {
	      ptr = mem + cury*rowstride + cur->x1;
	      memset (ptr, spot.pixel, cur->x2 - cur->x1);
	    }
	  break;
	case 16:
	  {
	    int i;
	    n = cur->x2 - cur->x1;
	    for (cury = cur->y1; cury < cur->y2; cury++)
	      {
		guint16 *p16 = (guint16 *)(mem + cury * rowstride + cur->x1*2);
		for (i = 0; i < n; i++)
		  *(p16++) = spot.pixel;
	      }
	  }
	  break;
	case 24:
	  {
	    guchar redval = spot.red>>8, greenval=spot.green>>8, blueval=spot.blue>>8;
	    guchar *firstline, *ptr_end;

	    if ((cur->y2 - cur->y1) <= 0)
	      break;

	    n = (cur->x2 - cur->x1)*3;

	    firstline = ptr = mem + cur->y1 * rowstride + cur->x1*3;
	    ptr_end = ptr+n;
	    while (ptr < ptr_end)
	      {
		ptr[gdk_display->red_byte] = redval;
		ptr[gdk_display->green_byte] = greenval;
		ptr[gdk_display->blue_byte] = blueval;
		ptr += 3;
	      }
	    for (cury = cur->y1 + 1, ptr = mem + cury * rowstride + cur->x1*3; cury < cur->y2; cury++, ptr += rowstride)
	      {
		memcpy (ptr, firstline, n);
	      }
	  }
	  break;
	case 32:
	  {
	    int i;
	    n = cur->x2 - cur->x1;
	    for (cury = cur->y1; cury < cur->y2; cury++)
	      {
		guint32 *p32 = (guint32 *)(mem + cury * rowstride + cur->x1*4);
		for (i = 0; i < n; i++)
		  *(p32++) = spot.pixel;
	      }
	  }
	  break;
	default:
	  g_assert_not_reached ();
#if 0
	  for(cury = cur->y1; cury < cur->y2; cury++)
	    {
	      for(curx = cur->x1; curx < cur->x2; curx++)
		{
		  gdk_fb_drawable_set_pixel (drawable, gc, curx, cury, &spot, TRUE);
		}
	    }
#endif
	  break;
	}
    }
}

void
gdk_fb_fill_spans (GdkDrawable *real_drawable,
		   GdkGC *gc,
		   GdkRectangle *rects,
		   int nrects)
{
  int i;
  GdkColor color;
  GdkRegion *real_clip_region, *tmpreg;
  GdkRectangle draw_rect;
  GdkVisual *visual = gdk_visual_get_system ();
  gboolean handle_cursor = FALSE;
  GdkDrawable *drawable;
  GdkDrawableFBData *private;

  drawable = real_drawable;
  private = GDK_DRAWABLE_FBDATA (drawable);

  if (GDK_IS_WINDOW (private->wrapper) && !GDK_WINDOW_P (private->wrapper)->mapped)
    return;
  if (GDK_IS_WINDOW (private->wrapper) && GDK_WINDOW_P (private->wrapper)->input_only)
    g_error ("Drawing on the evil input-only!");

  if (gc && (GDK_GC_FBDATA (gc)->values_mask | GDK_GC_FOREGROUND))
    color = GDK_GC_FBDATA (gc)->values.foreground;
  else if (GDK_IS_WINDOW (private->wrapper))
    color = GDK_WINDOW_P (private->wrapper)->bg_color;
  else
    gdk_color_black (private->colormap, &color);

  real_clip_region = gdk_fb_clip_region (drawable, gc, TRUE, (!gc || GDK_GC_FBDATA (gc)->values.function != GDK_INVERT));

  if (private->mem == GDK_DRAWABLE_IMPL_FBDATA (gdk_parent_root)->mem &&
      gdk_fb_cursor_region_need_hide (real_clip_region))
    {
      handle_cursor = TRUE;
      gdk_fb_cursor_hide ();
    }
    
  for (i = 0; i < nrects; i++)
    {
      GdkSegment cur;
      int j;

      cur.x1 = rects[i].x;
      cur.y1 = rects[i].y;
      cur.x2 = cur.x1 + rects[i].width;
      cur.y2 = cur.y1 + rects[i].height;
      g_assert (cur.x2 >= cur.x1);
      g_assert (cur.y2 >= cur.y1);

      cur.x1 += private->abs_x;
      cur.x1 = MAX (cur.x1, private->llim_x);

      cur.x2 += private->abs_x;
      cur.x2 = MIN (cur.x2, private->lim_x);
      cur.x1 = MIN (cur.x1, cur.x2);

      cur.y1 += private->abs_y;
      cur.y1 = MAX (cur.y1, private->llim_y);

      cur.y2 += private->abs_y;
      cur.y2 = MIN (cur.y2, private->lim_y);
      cur.y1 = MIN (cur.y1, cur.y2);

      draw_rect.x = cur.x1;
      draw_rect.y = cur.y1;
      draw_rect.width = cur.x2 - cur.x1;
      draw_rect.height = cur.y2 - cur.y1;

      switch (gdk_region_rect_in (real_clip_region, &draw_rect))
	{
	case GDK_OVERLAP_RECTANGLE_PART:
	  tmpreg = gdk_region_rectangle (&draw_rect);
	  gdk_region_intersect (tmpreg, real_clip_region);
	  for (j = 0; j < tmpreg->numRects; j++)
	    {
	      cur = tmpreg->rects[j];
	      gdk_fb_fill_span (drawable, gc, &cur, &color, visual);
	    }
	  gdk_region_destroy (tmpreg);
	  break;
	case GDK_OVERLAP_RECTANGLE_IN:
	  gdk_fb_fill_span (drawable, gc, &cur, &color, visual);
	  break;
	default:
	  break;
	}
    }

  gdk_region_destroy (real_clip_region);
  if (handle_cursor)
    gdk_fb_cursor_unhide ();
}

static GetPixelRet
gdk_fb_drawable_get_pixel (GdkDrawable *drawable,
			   GdkGC *gc,
			   int x,
			   int y,
			   GdkColor *spot,
			   gboolean abs_coords,
			   GdkDrawable *bg_relto,
			   GdkDrawable *bgpm)
{
  GetPixelRet retval = GPR_NONE;
  GdkDrawableFBData *private = GDK_DRAWABLE_FBDATA (drawable);
  guchar *mem = private->mem;
  guint rowstride = private->rowstride;

  if (!abs_coords)
    {
      x += private->abs_x;
      y += private->abs_y;
    }
  
  switch (private->depth)
    {
    case 1:
      {
	guchar foo = mem[(x >> 3) + y * rowstride];
	if (foo & (1 << (x % 8)))
	  *spot = GDK_GC_FBDATA (gc)->values.foreground;
	else
	  {
	    retval = GPR_USED_BG;

	    if (bgpm)
	      {
		int bgx, bgy;

		bgx = (x - GDK_DRAWABLE_IMPL_FBDATA (bg_relto)->abs_x) % GDK_DRAWABLE_IMPL_FBDATA (bgpm)->width;
		bgy = (y - GDK_DRAWABLE_IMPL_FBDATA (bg_relto)->abs_y) % GDK_DRAWABLE_IMPL_FBDATA (bgpm)->height;

		gdk_fb_drawable_get_pixel (bgpm, gc, bgx, bgy, spot, FALSE, NULL, NULL);
		retval = GPR_USED_BG;
	      }
	    else
	      {
		*spot = GDK_GC_FBDATA (gc)->values.background;
	      }
	  }
      }
      break;
    case 71:
      if (mem[x + y * rowstride])
	*spot = GDK_GC_FBDATA (gc)->values.foreground;
      else
	*spot = GDK_GC_FBDATA (gc)->values.background;
      break;
    case 77:
      retval = GPR_AA_GRAYVAL;
      spot->pixel = mem[x + y * rowstride] << 1;
      spot->red = spot->green = spot->blue = spot->pixel << 8;
      break;
    case 78: /* AA mode */
      retval = GPR_AA_GRAYVAL;
      spot->pixel = mem[x + y * rowstride];
      spot->red = spot->green = spot->blue = spot->pixel << 8;
      break;
    case 8:
      spot->pixel = mem[x + y * rowstride];
      *spot = private->colormap->colors[spot->pixel];
      break;
    case 16:
      {
	guint16 val16 = *((guint16 *)&mem[x*2 + y*rowstride]);

	spot->red = (((1<<gdk_display->modeinfo.red.length) - 1) & (val16 >> gdk_display->modeinfo.red.offset)) << (16 - gdk_display->modeinfo.red.length);
	spot->green = (((1<<gdk_display->modeinfo.green.length) - 1) & (val16 >> gdk_display->modeinfo.green.offset)) << (16 - gdk_display->modeinfo.green.length);
	spot->blue = (((1<<gdk_display->modeinfo.blue.length) - 1) & (val16 >> gdk_display->modeinfo.blue.offset)) << (16 - gdk_display->modeinfo.blue.length);

	spot->pixel = val16;
      }
      break;
    case 24:
      {
	guchar *smem = &mem[x*3 + y*rowstride];
	spot->red = smem[gdk_display->red_byte] << 8;
	spot->green = smem[gdk_display->green_byte] << 8;
	spot->blue = smem[gdk_display->blue_byte] << 8;
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
	spot->pixel = (smem[0]<<16)|(smem[1]<<8)|smem[2];
#else
	spot->pixel = smem[0]|(smem[1]<<8)|(smem[2]<<16);
#endif
      }
      break;
    case 32:
      {
	guchar *smem = &mem[x*4 + y*rowstride];
	spot->red = smem[gdk_display->red_byte] << 8;
	spot->green = smem[gdk_display->green_byte] << 8;
	spot->blue = smem[gdk_display->blue_byte] << 8;
	spot->pixel = *(guint32 *)smem;
      }
      break;
    }

  return retval;
}

static void
gdk_fb_drawable_set_pixel(GdkDrawable *drawable, GdkGC *gc, int x, int y, GdkColor *spot,
			  gboolean abs_coords)
{
  GdkDrawableFBData *private = GDK_DRAWABLE_FBDATA (drawable);
  guchar *mem = private->mem;
  guint rowstride = private->rowstride;

  if (!abs_coords)
    {
      x += private->abs_x;
      y += private->abs_y;
    }

  switch (private->depth)
    {
    case 1:
      {
	guchar *foo = mem + (y*rowstride) + (x >> 3);

	if (spot->pixel)
	  *foo |= (1 << (x % 8));
	else
	  *foo &= ~(1 << (x % 8));
      }
      break;
    case 8:
      mem[x + y*rowstride] = spot->pixel;
      break;
    case 16:
      {
	guint16 *p16 = (guint16 *)&mem[x*2 + y*rowstride];
	*p16 = spot->pixel;
      }
      break;
    case 24:
      {
	guchar *smem = &mem[x*3 + y*rowstride];
	smem[gdk_display->red_byte] = spot->red >> 8;
	smem[gdk_display->green_byte] = spot->green >> 8;
	smem[gdk_display->blue_byte] = spot->blue >> 8;
      };
      break;
    case 32:
      {
	guint32 *smem = (guint32 *)&mem[x*4 + y*rowstride];
	*smem = spot->pixel;
      }
      break;
    default:
      g_assert_not_reached ();
      break;
    }

}

void
gdk_fb_drawing_context_init (GdkFBDrawingContext *dc,
			     GdkDrawable *drawable,
			     GdkGC *gc,
			     gboolean draw_bg,
			     gboolean do_clipping)
{
  GdkDrawableFBData *private = GDK_DRAWABLE_FBDATA (drawable);
  dc->mem = private->mem;
  dc->rowstride = private->rowstride;
  dc->handle_cursor = FALSE;
  dc->bgpm = NULL;
  dc->bg_relto = private->wrapper;
  dc->draw_bg = draw_bg;

  if (GDK_IS_WINDOW (private->wrapper))
    {
      dc->bgpm = GDK_WINDOW_P (private->wrapper)->bg_pixmap;
      if (dc->bgpm == GDK_PARENT_RELATIVE_BG)
	{
	  for (; dc->bgpm == GDK_PARENT_RELATIVE_BG && dc->bg_relto; dc->bg_relto = (GdkWindow *)GDK_WINDOW_P (dc->bg_relto)->parent)
	    dc->bgpm = GDK_WINDOW_P (dc->bg_relto)->bg_pixmap;
	}

      if (dc->bgpm == GDK_NO_BG)
	dc->bgpm = NULL;
    }
  dc->clipxoff = - private->abs_x;
  dc->clipyoff = - private->abs_y;

  dc->real_clip_region = gdk_fb_clip_region (drawable, gc, do_clipping, TRUE);

  if (gc)
    {
      dc->clipxoff -= GDK_GC_FBDATA (gc)->values.clip_x_origin;
      dc->clipyoff -= GDK_GC_FBDATA (gc)->values.clip_y_origin;

      if (GDK_GC_FBDATA (gc)->values.clip_mask)
	{
	  dc->clipmem = GDK_DRAWABLE_IMPL_FBDATA (GDK_GC_FBDATA (gc)->values.clip_mask)->mem;
	  dc->clip_rowstride = GDK_DRAWABLE_IMPL_FBDATA (GDK_GC_FBDATA (gc)->values.clip_mask)->rowstride;
	}
    }

  if (do_clipping &&
      private->mem == GDK_DRAWABLE_IMPL_FBDATA (gdk_parent_root)->mem &&
      gdk_fb_cursor_region_need_hide (dc->real_clip_region))
    {
      dc->handle_cursor = TRUE;
      gdk_fb_cursor_hide ();
    }
}

void
gdk_fb_drawing_context_finalize (GdkFBDrawingContext *dc)
{
  gdk_region_destroy (dc->real_clip_region);

  if (dc->handle_cursor)
    gdk_fb_cursor_unhide ();
}

void
gdk_fb_draw_drawable_2 (GdkDrawable *drawable,
			GdkGC       *gc,
			GdkPixmap   *src,
			gint         xsrc,
			gint         ysrc,
			gint         xdest,
			gint         ydest,
			gint         width,
			gint         height,
			gboolean     draw_bg,
			gboolean     do_clipping)
{
  GdkFBDrawingContext *dc, dc_data;
  dc = &dc_data;

  gdk_fb_drawing_context_init (dc, drawable, gc, draw_bg, do_clipping);
  gdk_fb_draw_drawable_3 (drawable, gc, src, dc, xsrc, ysrc, xdest, ydest, width, height);
  gdk_fb_drawing_context_finalize (dc);
}

void
gdk_fb_draw_drawable_3 (GdkDrawable *drawable,
			GdkGC       *gc,
			GdkPixmap   *src,
			GdkFBDrawingContext *dc,
			gint         xsrc,
			gint         ysrc,
			gint         xdest,
			gint         ydest,
			gint         width,
			gint         height)
{
  GdkDrawableFBData *private = GDK_DRAWABLE_FBDATA (drawable);
  GdkDrawableFBData *src_private = GDK_DRAWABLE_FBDATA (src);
  GdkRectangle rect;
  guchar *srcmem = GDK_DRAWABLE_FBDATA(src)->mem;
  int src_x_off, src_y_off;
  GdkRegion *tmpreg, *real_clip_region;
  int i;
  int draw_direction = 1;
  gboolean do_quick_draw;

  if (GDK_IS_WINDOW (private->wrapper))
    {
      if (!GDK_WINDOW_P (private->wrapper)->mapped)
	return;
      if (GDK_WINDOW_P (private->wrapper)->input_only)
	g_error ("Drawing on the evil input-only!");
    }

  if (drawable == src)
    {
      GdkRegionBox srcb, destb;
      srcb.x1 = xsrc;
      srcb.y1 = ysrc;
      srcb.x2 = xsrc + width;
      srcb.y2 = ysrc + height;
      destb.x1 = xdest;
      destb.y1 = ydest;
      destb.x2 = xdest + width;
      destb.y2 = xdest + height;

      if (EXTENTCHECK (&srcb, &destb) && ydest > ysrc)
	draw_direction = -1;
#if 0
	{
	  GdkDrawableFBData *fbd = src_private;

	  /* One lame hack deserves another ;-) */
	  srcmem = g_alloca (fbd->rowstride * (fbd->lim_y - fbd->llim_y));
	  memmove (srcmem, dc->mem + (fbd->rowstride * fbd->llim_y), fbd->rowstride * (fbd->lim_y - fbd->llim_y));
	  srcmem -= (fbd->rowstride * fbd->llim_y);
	}
#endif
    }

  /* Do some magic to avoid creating extra regions unnecessarily */
  tmpreg = dc->real_clip_region;

  rect.x = xdest + private->abs_x;
  rect.y = ydest + private->abs_y;
  rect.width = width;
  rect.height = height;
  real_clip_region = gdk_region_rectangle (&rect);
  gdk_region_intersect (real_clip_region, tmpreg);

  rect.x = xdest + private->abs_x;
  rect.y = ydest + private->abs_y;
  rect.width = MAX (src_private->width - xsrc, 0);
  rect.height = MAX (src_private->height - ysrc, 0);
  if (!rect.width || !rect.height)
    goto out;
  tmpreg = gdk_region_rectangle (&rect);
  gdk_region_intersect (real_clip_region, tmpreg);
  gdk_region_destroy (tmpreg);

  src_x_off = (src_private->abs_x + xsrc) - (private->abs_x + xdest);
  src_y_off = (src_private->abs_y + ysrc) - (private->abs_y + ydest);

  do_quick_draw = src_private->depth == private->depth  &&
    src_private->depth >= 8 &&
    src_private->depth <= 32 &&
    (!gc || !GDK_GC_FBDATA (gc)->values.clip_mask);

  for(i = 0; i < real_clip_region->numRects; i++)
    {
      GdkRegionBox *cur = &real_clip_region->rects[i];
      int start_y, end_y, cur_y;

      if (draw_direction > 0)
	{
	  start_y = cur->y1;
	  end_y = cur->y2;
	}
      else
	{
	  start_y = cur->y2 - 1;
	  end_y = cur->y1 - 1;
	}

      if (do_quick_draw)
	{
	  guint depth = src_private->depth;
	  guint src_rowstride = src_private->rowstride;
	  int linelen = (cur->x2 - cur->x1)*(depth>>3);

	  for(cur_y = start_y; cur_y*draw_direction < end_y*draw_direction; cur_y += draw_direction)
	    {
	      memmove (dc->mem + (cur_y * dc->rowstride) + cur->x1*(depth>>3),
		       srcmem + ((cur_y + src_y_off)*src_rowstride) + (cur->x1 + src_x_off)*(depth>>3),
		       linelen);
	    }
	}
      else
	{
	  int cur_x;

	  for (cur_y = start_y; cur_y*draw_direction < end_y*draw_direction; cur_y+=draw_direction)
	    {
	      for (cur_x = cur->x1; cur_x < cur->x2; cur_x++)
		{
		  GdkColor spot;

		  if (gc && GDK_GC_FBDATA(gc)->values.clip_mask)
		    {
		      int maskx = cur_x+dc->clipxoff, masky = cur_y + dc->clipyoff;
		      guchar foo;

		      foo = dc->clipmem[masky*dc->clip_rowstride + (maskx >> 3)];

		      if (!(foo & (1 << (maskx % 8))))
			continue;
		    }

		  switch (gdk_fb_drawable_get_pixel (src, gc, cur_x + src_x_off, cur_y + src_y_off, &spot, TRUE, NULL, NULL))
		    {
		    case GPR_AA_GRAYVAL:
		      {
			GdkColor realspot, fg;
			guint graylevel = spot.pixel;
			gint tmp;

			if (private->depth == 1)
			  {
			    if (spot.pixel > 192)
			      spot = GDK_GC_FBDATA (gc)->values.foreground;
			    else
			      spot = GDK_GC_FBDATA (gc)->values.background;
			    break;
			  }
			else
			  {
			    if (graylevel >= 254)
			      {
				spot = GDK_GC_FBDATA (gc)->values.foreground;
			      }
			    else if (graylevel <= 2)
			      {
				if (!dc->draw_bg)
				  continue;

				spot = GDK_GC_FBDATA (gc)->values.background;
			      }
			    else
			      {
				switch (gdk_fb_drawable_get_pixel (drawable, gc, cur_x, cur_y, &realspot, TRUE, dc->bg_relto, dc->bgpm))
				  {
				  case GPR_NONE:
				  case GPR_USED_BG:
				    break;
				  default:
				    g_assert_not_reached ();
				    break;
				  }

				fg = GDK_GC_FBDATA (gc)->values.foreground;
				/* Now figure out what 'spot' should actually look like */
				fg.red >>= 8;
				fg.green >>= 8;
				fg.blue >>= 8;
				realspot.red >>= 8;
				realspot.green >>= 8;
				realspot.blue >>= 8;

				tmp = (fg.red - realspot.red) * graylevel;
				spot.red = realspot.red + ((tmp + (tmp >> 8) + 0x80) >> 8);
				spot.red <<= 8;

				tmp = (fg.green - realspot.green) * graylevel;
				spot.green = realspot.green + ((tmp + (tmp >> 8) + 0x80) >> 8);
				spot.green <<= 8;

				tmp = (fg.blue - realspot.blue) * graylevel;
				spot.blue = realspot.blue + ((tmp + (tmp >> 8) + 0x80) >> 8);
				spot.blue <<= 8;

				/* Now find the pixel for this thingie */
				switch (private->depth)
				  {
				  case 8:
				    if (!gdk_colormap_alloc_color (private->colormap, &spot, FALSE, TRUE))
				      {
					g_error ("Can't allocate AA color!");
				      }
				    break;
				  case 16:
				    spot.pixel = (spot.red >> (16 - gdk_display->modeinfo.red.length)) << gdk_display->modeinfo.red.offset;
				    spot.pixel |= (spot.green >> (16 - gdk_display->modeinfo.green.length)) << gdk_display->modeinfo.green.offset;
				    spot.pixel |= (spot.blue >> (16 - gdk_display->modeinfo.blue.length)) << gdk_display->modeinfo.blue.offset;
				    break;
				  case 24:
				  case 32:
				    spot.pixel = ((spot.red & 0xFF00) << (gdk_display->modeinfo.red.offset - 8))
				      | ((spot.green & 0xFF00) << (gdk_display->modeinfo.green.offset - 8))
				      | ((spot.blue & 0xFF00) << (gdk_display->modeinfo.blue.offset - 8));
				    break;
				  }
			      }
			  }
		      }
		      break;
		    case GPR_USED_BG:
		      if (!dc->draw_bg)
			continue;
		      break;
		    case GPR_NONE:
		      break;
		    default:
		      g_assert_not_reached ();
		      break;
		    }

		  gdk_fb_drawable_set_pixel (drawable, gc, cur_x, cur_y, &spot, src_private->depth);
		}
	    }
	}
    }

 out:
  gdk_region_destroy (real_clip_region);
}

void
gdk_fb_draw_drawable (GdkDrawable *drawable,
		      GdkGC       *gc,
		      GdkPixmap   *src,
		      gint         xsrc,
		      gint         ysrc,
		      gint         xdest,
		      gint         ydest,
		      gint         width,
		      gint         height)
{
  gdk_fb_draw_drawable_2 (drawable, gc, GDK_DRAWABLE_IMPL (src), xsrc, ysrc, xdest, ydest, width, height, TRUE, TRUE);
}

static void
gdk_fb_draw_text(GdkDrawable    *drawable,
		 GdkFont        *font,
		 GdkGC          *gc,
		 gint            x,
		 gint            y,
		 const gchar    *text,
		 gint            text_length)
{
  g_warning ("gdk_fb_draw_text NYI");
}

static void
gdk_fb_draw_text_wc (GdkDrawable    *drawable,
		     GdkFont	     *font,
		     GdkGC	     *gc,
		     gint	      x,
		     gint	      y,
		     const GdkWChar *text,
		     gint	      text_length)
{
  g_warning ("gdk_fb_draw_text_wc NYI");
}

void
gdk_fb_draw_rectangle (GdkDrawable    *drawable,
		       GdkGC          *gc,
		       gint            filled,
		       gint            x,
		       gint            y,
		       gint            width,
		       gint            height)
{
  GdkRectangle rect;

  if (filled)
    {
      rect.x = x;
      rect.y = y;
      rect.width = width;
      rect.height = height;
      gdk_fb_fill_spans (drawable, gc, &rect, 1);
    }
  else
    {
      GdkPoint pts[5];
      pts[0].x = pts[4].x = x;
      pts[0].y = pts[4].y = y;
      pts[1].x = x + width;
      pts[1].y = y;
      pts[2].x = x + width;
      pts[2].y = y + height;
      pts[3].x = x;
      pts[3].y = y + height;
      gdk_fb_draw_lines (drawable, gc, pts, 5);
    }
}

static void
gdk_fb_draw_points (GdkDrawable    *drawable,
		    GdkGC          *gc,
		    GdkPoint       *points,
		    gint            npoints)
{
  GdkRectangle *rects = g_alloca (npoints * sizeof(GdkRectangle));
  int i;

  for (i = 0; i < npoints; i++)
    {
      rects[i].x = points[i].x;
      rects[i].y = points[i].y;
      rects[i].width = rects[i].height = 1;
    }

  gdk_fb_fill_spans (drawable, gc, rects, npoints);
}

static void
gdk_fb_draw_arc (GdkDrawable    *drawable,
		 GdkGC          *gc,
		 gint            filled,
		 gint            x,
		 gint            y,
		 gint            width,
		 gint            height,
		 gint            angle1,
		 gint            angle2)
{
  miArc arc;

  arc.x = x;
  arc.y = y;
  arc.width = width;
  arc.height = height;
  arc.angle1 = angle1;
  arc.angle2 = angle2;

  if (filled)
    miPolyFillArc (drawable, gc, 1, &arc);
  else
    miPolyArc (drawable, gc, 1, &arc);
}

static void
gdk_fb_draw_polygon (GdkDrawable    *drawable,
		     GdkGC          *gc,
		     gint            filled,
		     GdkPoint       *points,
		     gint            npoints)
{
  if (filled)
    miFillPolygon (drawable, gc, 0, 0, npoints, points);
  else
    {
      GdkPoint *realpts = g_alloca (sizeof(GdkPoint) * (npoints + 1));

      memcpy (realpts, points, sizeof(GdkPoint) * npoints);
      realpts[npoints] = points[0];
      gdk_fb_draw_lines (drawable, gc, points, npoints);
    }
}

static void
gdk_fb_draw_lines (GdkDrawable    *drawable,
		   GdkGC          *gc,
		   GdkPoint       *points,
		   gint            npoints)
{
  if (GDK_GC_FBDATA (gc)->values.line_width > 0)
    miWideLine (drawable, gc, 0, npoints, points);
  else
    miZeroLine (drawable, gc, 0, npoints, points);
}

static void
gdk_fb_draw_segments (GdkDrawable    *drawable,
		      GdkGC          *gc,
		      GdkSegment     *segs,
		      gint            nsegs)
{
  GdkPoint pts[2];
  int i;

  for(i = 0; i < nsegs; i++)
    {
      pts[0].x = segs[i].x1;
      pts[0].y = segs[i].y1;
      pts[1].x = segs[i].x2;
      pts[1].y = segs[i].y2;
      
      gdk_fb_draw_lines (drawable, gc, pts, 2);
    }
}

void
gdk_fb_drawable_clear (GdkDrawable *d)
{
  extern void
    _gdk_windowing_window_clear_area (GdkWindow *window,
				      gint       x,
				      gint       y,
				      gint       width,
				      gint       height);

  _gdk_windowing_window_clear_area (d, 0, 0, GDK_DRAWABLE_IMPL_FBDATA (d)->width, GDK_DRAWABLE_IMPL_FBDATA (d)->height);
}

extern FT_Library gdk_fb_ft_lib;

extern void pango_fb_font_set_size(PangoFont *font);

static void
gdk_fb_draw_glyphs (GdkDrawable      *drawable,
		    GdkGC	     *gc,
		    PangoFont        *font,
		    gint              x,
		    gint              y,
		    PangoGlyphString *glyphs)
{
  int i;
  int xpos;
  GdkFBDrawingContext fbdc;

  g_return_if_fail (font);

  gdk_fb_drawing_context_init (&fbdc, drawable, gc, FALSE, TRUE);

  /* Fake its existence as a pixmap */

  pango_fb_font_set_size (font);
  
  for (i = xpos = 0; i < glyphs->num_glyphs; i++)
    {
      PangoFBGlyphInfo *pgi;
      int this_wid;

      pgi = pango_fb_font_get_glyph_info (font, glyphs->glyphs[i].glyph);

      this_wid = (xpos + glyphs->glyphs[i].geometry.width)/PANGO_SCALE;
      gdk_fb_draw_drawable_3 (drawable, gc, (GdkPixmap *)&pgi->fbd,
			      &fbdc,
			      0, 0,
			      x + (xpos + glyphs->glyphs[i].geometry.x_offset)/PANGO_SCALE,
			      y + glyphs->glyphs[i].geometry.y_offset / PANGO_SCALE
			      + pgi->hbearing,
			      this_wid, pgi->fbd.drawable_data.height);

      xpos += glyphs->glyphs[i].geometry.width;
    }

  gdk_fb_drawing_context_finalize (&fbdc);
}


static void
gdk_fb_draw_image (GdkDrawable *drawable,
		   GdkGC       *gc,
		   GdkImage    *image,
		   gint         xsrc,
		   gint         ysrc,
		   gint         xdest,
		   gint         ydest,
		   gint         width,
		   gint         height)
{
  GdkImagePrivateFB *image_private;
  GdkPixmapFBData fbd;

  g_return_if_fail (drawable != NULL);
  g_return_if_fail (image != NULL);
  g_return_if_fail (gc != NULL);

  image_private = (GdkImagePrivateFB*) image;

  g_return_if_fail (image->type == GDK_IMAGE_NORMAL);

  /* Fake its existence as a pixmap */
  memset (&fbd, 0, sizeof(fbd));
  fbd.drawable_data.mem = image->mem;
  fbd.drawable_data.rowstride = image->bpl;
  fbd.drawable_data.width = fbd.drawable_data.lim_x = image->width;
  fbd.drawable_data.height = fbd.drawable_data.lim_y = image->height;
  fbd.drawable_data.depth = image->depth;
  fbd.drawable_data.window_type = GDK_DRAWABLE_PIXMAP;

  gdk_fb_draw_drawable_2 (drawable, gc, (GdkPixmap *)&fbd, xsrc, ysrc, xdest, ydest, width, height, TRUE, TRUE);
}

static gint
gdk_fb_get_depth (GdkDrawable *drawable)
{
  return GDK_DRAWABLE_IMPL_FBDATA (drawable)->depth;
}

static GdkVisual*
gdk_fb_get_visual (GdkDrawable    *drawable)
{
  return gdk_visual_get_system();
}