gdkrender-fb.c

linux下电话本所依赖的一些图形库

	      r = dst[gdk_display->red_byte];
	      tmp = (fg_r - r) * (gint)grayval;
	      r = r + ((tmp + (tmp >> 8) + 0x80) >> 8);
	      dst[gdk_display->red_byte] = r;

	      g = dst[gdk_display->green_byte];
	      tmp = (fg_g - g) * (gint)grayval;
	      g = g + ((tmp + (tmp >> 8) + 0x80) >> 8);
	      dst[gdk_display->green_byte] = g;

	      b = dst[gdk_display->blue_byte];
	      tmp = (fg_b - b) * (gint)grayval;
	      b = b + ((tmp + (tmp >> 8) + 0x80) >> 8);
	      dst[gdk_display->blue_byte] = b;
	    }
	}
    }
}

/*************************************
 * gc->fill_rectangle() implementations
 *************************************/

void
gdk_fb_fill_rectangle_generic (GdkDrawable    *drawable,
			       GdkGC          *gc,
			       GdkRectangle   *rect,
			       GdkColor       *color)
{
  GdkDrawableFBData *private;
  GdkSpan *spans;
  int i;

  if (!_gdk_fb_is_active_vt)
    return;

  private = GDK_DRAWABLE_FBDATA (drawable);

  spans = g_new (GdkSpan, rect->height);
  for (i = 0; i < rect->height; i++)
    {
      spans[i].x = rect->x - private->abs_x;
      spans[i].y = rect->y+i - private->abs_y;
      spans[i].width = rect->width;
    }
  gdk_fb_fill_spans (drawable, gc, spans, rect->height, TRUE);
  g_free (spans);
}

void
gdk_fb_fill_rectangle_simple_16 (GdkDrawable    *drawable,
				 GdkGC          *gc,
				 GdkRectangle   *rect,
				 GdkColor       *color)
{
  GdkGCFBData *gc_private;
  GdkDrawableFBData *private;
  guchar *ptr;
  guint rowstride;
  int n;
  gboolean extra;
  int i;
  guint32 pixel;
  gint height;
  
  if (!_gdk_fb_is_active_vt)
    return;

  private = GDK_DRAWABLE_FBDATA (drawable);
  gc_private = GDK_GC_FBDATA (gc);

  rowstride = private->rowstride - rect->width*2;
  ptr = (guchar *)private->mem + rect->y * private->rowstride + rect->x*2;

  extra = rect->width&1;
  n = rect->width>>1;
    
  pixel = (color->pixel << 16) | color->pixel;

  height = rect->height;
  while (height>0)
    {
      i = n;
      while (i>0)
	{
	  *(guint32 *)ptr = pixel;
	  ptr += 4;
	  i--;
	}
      if (extra)
	{
	  *(guint16 *)ptr = color->pixel;
	  ptr += 2;
	}
      ptr += rowstride;
      height--; 
    }
}

void
gdk_fb_fill_rectangle_simple_32 (GdkDrawable    *drawable,
				 GdkGC          *gc,
				 GdkRectangle   *rect,
				 GdkColor       *color)
{
  GdkGCFBData *gc_private;
  GdkDrawableFBData *private;
  guchar *ptr;
  guint rowstride;
  int n;
  int i;
  guint32 pixel;
  gint height;
  
  if (!_gdk_fb_is_active_vt)
    return;

  private = GDK_DRAWABLE_FBDATA (drawable);
  gc_private = GDK_GC_FBDATA (gc);

  rowstride = private->rowstride - rect->width*4;
  ptr = (guchar *)private->mem + rect->y * private->rowstride + rect->x*4;

  n = rect->width;
    
  pixel = color->pixel;

  height = rect->height;
  while (height>0)
    {
      i = n;
      while (i>0)
	{
	  *(guint32 *)ptr = pixel;
	  ptr += 4;
	  i--;
	}
      ptr += rowstride;
      height--; 
    }
}


/*************************************
 * GC state calculation
 *************************************/

void
_gdk_fb_gc_calc_state (GdkGC           *gc,
		       GdkGCValuesMask  changed)
{
  GdkGCFBData *gc_private;
  int i;

  gc_private = GDK_GC_FBDATA (gc);

  gc_private->fill_span = gdk_fb_fill_span_generic;
  gc_private->fill_rectangle = gdk_fb_fill_rectangle_generic;

  for (i = 0; i < GDK_NUM_FB_SRCBPP; i++)
    gc_private->draw_drawable[i] = gdk_fb_draw_drawable_generic;
  
  if (changed & _GDK_FB_GC_DEPTH)
    switch (gc_private->depth)
      {
      case 1:
	gc_private->set_pixel = gdk_fb_set_pixel_1;
	gc_private->get_color = gdk_fb_get_color_1;
	break;
      case 8:
	gc_private->set_pixel = gdk_fb_set_pixel_8;
	gc_private->get_color = gdk_fb_get_color_8;
	break;
      case 16:
	gc_private->set_pixel = gdk_fb_set_pixel_16;
	gc_private->get_color = gdk_fb_get_color_16;
	break;
      case 24:
	gc_private->set_pixel = gdk_fb_set_pixel_24;
	gc_private->get_color = gdk_fb_get_color_24;
	break;
      case 32:
	gc_private->set_pixel = gdk_fb_set_pixel_32;
	gc_private->get_color = gdk_fb_get_color_32;
	break;
      default:
	g_assert_not_reached ();
	break;
      }

  if (!gc_private->values.clip_mask)
    {
    switch (gc_private->depth)
      {
      case 8:
	gc_private->draw_drawable[GDK_FB_SRC_BPP_8] = gdk_fb_draw_drawable_memmove;
	break;
      case 16:
	gc_private->draw_drawable[GDK_FB_SRC_BPP_16] = gdk_fb_draw_drawable_memmove;
	break;
      case 24:
	gc_private->draw_drawable[GDK_FB_SRC_BPP_8_AA_GRAYVAL] = gdk_fb_draw_drawable_aa_24;
	gc_private->draw_drawable[GDK_FB_SRC_BPP_24] = gdk_fb_draw_drawable_memmove;
	break;
      case 32:
	gc_private->draw_drawable[GDK_FB_SRC_BPP_32] = gdk_fb_draw_drawable_memmove;
	break;
      }
    }
  
  if (!gc_private->values.clip_mask &&
      !gc_private->values.tile &&
      !gc_private->values.stipple &&
       gc_private->values.function == GDK_COPY)
    {
      switch (gc_private->depth)
	{
	case 1:
	  gc_private->fill_span = gdk_fb_fill_span_simple_1;
	  break;
	case 8:
	  gc_private->fill_span = gdk_fb_fill_span_simple_8;
	  break;
	case 16:
	  gc_private->fill_span = gdk_fb_fill_span_simple_16;
	  gc_private->fill_rectangle = gdk_fb_fill_rectangle_simple_16;
	  break;
	case 24:
	  gc_private->fill_span = gdk_fb_fill_span_simple_24;
	  break;
	case 32:
	  gc_private->fill_span = gdk_fb_fill_span_simple_32;
	  gc_private->fill_rectangle = gdk_fb_fill_rectangle_simple_32;
	  break;
	default:
	  g_assert_not_reached ();
	  break;
	}
    }
}

#ifdef ENABLE_SHADOW_FB
static void
gdk_shadow_fb_copy_rect_0 (gint x, gint y, gint width, gint height)
{
  guchar *dst, *src;
  gint depth;

  if (!_gdk_fb_is_active_vt)
    return;

  depth = gdk_display->modeinfo.bits_per_pixel / 8;

  dst = gdk_display->fb_mmap + x * depth + gdk_display->sinfo.line_length * y;
  src = gdk_display->fb_mem + x * depth + gdk_display->fb_stride * y;

  width = width*depth;
  while (height>0)
    {
      memcpy (dst, src, width);
      dst += gdk_display->sinfo.line_length;
      src += gdk_display->fb_stride;
      height--;
    }
}

static void
gdk_shadow_fb_copy_rect_90 (gint x, gint y, gint width, gint height)
{
  guchar *dst, *src, *pdst;
  gint depth;
  gint w;
  gint i;

  if (!_gdk_fb_is_active_vt)
    return;

  depth = gdk_display->modeinfo.bits_per_pixel / 8;

  src = gdk_display->fb_mem + x * depth + gdk_display->fb_stride * y;
  dst = gdk_display->fb_mmap + y * depth + gdk_display->sinfo.line_length * (gdk_display->fb_width - x - 1);

  while (height>0)
    {
      w = width;
      pdst = dst;
      while (w>0) {
	for (i = 0; i < depth; i++)
	  *pdst++ = *src++;
	pdst -= gdk_display->sinfo.line_length + depth;
	w--;
      }
      dst += depth;
      src += gdk_display->fb_stride - width * depth;
      height--;
    }
}

static void
gdk_shadow_fb_copy_rect_180 (gint x, gint y, gint width, gint height)
{
  guchar *dst, *src, *pdst;
  gint depth;
  gint w;
  gint i;

  if (!_gdk_fb_is_active_vt)
    return;

  depth = gdk_display->modeinfo.bits_per_pixel / 8;

  src = gdk_display->fb_mem + x * depth + gdk_display->fb_stride * y;
  dst = gdk_display->fb_mmap + (gdk_display->fb_width - x - 1) * depth + gdk_display->sinfo.line_length * (gdk_display->fb_height - y - 1) ;

  while (height>0)
    {
      w = width;
      pdst = dst;
      while (w>0) {
	for (i = 0; i < depth; i++)
	  *pdst++ = *src++;
	pdst -= 2 * depth;
	w--;
      }
      dst -= gdk_display->sinfo.line_length;
      src += gdk_display->fb_stride - width * depth;
      height--;
    }
}

static void
gdk_shadow_fb_copy_rect_270 (gint x, gint y, gint width, gint height)
{
  guchar *dst, *src, *pdst;
  gint depth;
  gint w;
  gint i;

  if (!_gdk_fb_is_active_vt)
    return;

  depth = gdk_display->modeinfo.bits_per_pixel / 8;

  src = gdk_display->fb_mem + x * depth + gdk_display->fb_stride * y;
  dst = gdk_display->fb_mmap + (gdk_display->fb_height - y - 1) * depth + gdk_display->sinfo.line_length * x;

  while (height>0)
    {
      w = width;
      pdst = dst;
      while (w>0) {
	for (i = 0; i < depth; i++)
	  *pdst++ = *src++;
	pdst += gdk_display->sinfo.line_length - depth;
	w--;
      }
      dst -= depth;
      src += gdk_display->fb_stride - width * depth;
      height--;
    }
}

static void (*shadow_copy_rect[4]) (gint x, gint y, gint width, gint height);

volatile gint refresh_queued = 0;
volatile gint refresh_x1, refresh_y1;
volatile gint refresh_x2, refresh_y2;

static void
gdk_shadow_fb_refresh (int signum)
{
  gint minx, miny, maxx, maxy;

  if (!refresh_queued)
    {
      struct itimerval timeout;
      /* Stop the timer */ 
      timeout.it_value.tv_sec = 0;
      timeout.it_value.tv_usec = 0;
      timeout.it_interval.tv_sec = 0;
      timeout.it_interval.tv_usec = 0;
      setitimer (ITIMER_REAL, &timeout, NULL);
      return;
    }
 
  
  minx = refresh_x1;
  miny = refresh_y1;
  maxx = refresh_x2;
  maxy = refresh_y2;
  refresh_queued = 0;

  /* clip x */
  if (minx < 0) {
    minx = 0;
    maxx = MAX (maxx, 0);
  }
  if (maxx >= gdk_display->fb_width) {
    maxx = gdk_display->fb_width-1;
    minx = MIN (minx, maxx);
  }
  /* clip y */
  if (miny < 0) {
    miny = 0;
    maxy = MAX (maxy, 0);
  }
  if (maxy >= gdk_display->fb_height) {
    maxy = gdk_display->fb_height-1;
    miny = MIN (miny, maxy);
  }
  
  (*shadow_copy_rect[_gdk_fb_screen_angle]) (minx, miny, maxx - minx + 1, maxy - miny + 1);
}

void
gdk_shadow_fb_stop_updates (void)
{
  struct itimerval timeout;

  refresh_queued = 0;

  /* Stop the timer */ 
  timeout.it_value.tv_sec = 0;
  timeout.it_value.tv_usec = 0;
  timeout.it_interval.tv_sec = 0;
  timeout.it_interval.tv_usec = 0;
  setitimer (ITIMER_REAL, &timeout, NULL);

  refresh_queued = 0;
}

void
gdk_shadow_fb_init (void)
{
  struct sigaction action;

  action.sa_handler = gdk_shadow_fb_refresh;
  sigemptyset (&action.sa_mask);
  action.sa_flags = 0;
  
  sigaction (SIGALRM, &action, NULL);

  shadow_copy_rect[GDK_FB_0_DEGREES] = gdk_shadow_fb_copy_rect_0;
  shadow_copy_rect[GDK_FB_90_DEGREES] = gdk_shadow_fb_copy_rect_90;
  shadow_copy_rect[GDK_FB_180_DEGREES] = gdk_shadow_fb_copy_rect_180;
  shadow_copy_rect[GDK_FB_270_DEGREES] = gdk_shadow_fb_copy_rect_270;
}

/* maxx and maxy are included */
void
gdk_shadow_fb_update (gint minx, gint miny, gint maxx, gint maxy)
{
  struct itimerval timeout;

  if (gdk_display->manager_blocked)
    return;
  
  g_assert (minx <= maxx);
  g_assert (miny <= maxy);

  if (refresh_queued)
    {
      refresh_x1 = MIN (refresh_x1, minx);
      refresh_y1 = MIN (refresh_y1, miny);
      refresh_x2 = MAX (refresh_x2, maxx);
      refresh_y2 = MAX (refresh_y2, maxy);
      refresh_queued = 1;
    }
  else
    {
      refresh_x1 = minx;
      refresh_y1 = miny;
      refresh_x2 = maxx;
      refresh_y2 = maxy;
      refresh_queued = 1;

      getitimer (ITIMER_REAL, &timeout);
      if (timeout.it_value.tv_usec == 0)
	{
	  timeout.it_value.tv_sec = 0;
	  timeout.it_value.tv_usec = 20000; /* 20 ms => 50 fps */
	  timeout.it_interval.tv_sec = 0;
	  timeout.it_interval.tv_usec = 20000; /* 20 ms => 50 fps */
	  setitimer (ITIMER_REAL, &timeout, NULL);
	}
    }
  
}
#else

void
gdk_shadow_fb_stop_updates (void)
{
}

void
gdk_shadow_fb_update (gint minx, gint miny, gint maxx, gint maxy)
{
}

void
gdk_shadow_fb_init (void)
{
}

#endif