void
gimp_paint_core_validate_canvas_tiles (GimpPaintCore *core,
gint x,
gint y,
gint w,
gint h)
{
gint i, j;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (core->canvas_tiles != NULL);
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
Tile *tile = tile_manager_get_tile (core->canvas_tiles, j, i,
FALSE, FALSE);
if (! tile_is_valid (tile))
{
tile = tile_manager_get_tile (core->canvas_tiles, j, i,
TRUE, TRUE);
memset (tile_data_pointer (tile, 0, 0), 0, tile_size (tile));
tile_release (tile, TRUE);
}
}
}
}
void
tile_update_rowhints (Tile *tile,
gint start,
gint rows)
{
const guchar *ptr;
gint bpp, ewidth;
gint x, y;
#ifdef HINTS_SANITY
g_assert (tile != NULL);
#endif
tile_allocate_rowhints (tile);
bpp = tile_bpp (tile);
ewidth = tile_ewidth (tile);
switch (bpp)
{
case 1:
case 3:
for (y = start; y < start + rows; y++)
tile_set_rowhint (tile, y, TILEROWHINT_OPAQUE);
break;
case 4:
#ifdef HINTS_SANITY
g_assert (tile != NULL);
#endif
ptr = tile_data_pointer (tile, 0, start);
#ifdef HINTS_SANITY
g_assert (ptr != NULL);
#endif
for (y = start; y < start + rows; y++)
{
TileRowHint hint = tile_get_rowhint (tile, y);
#ifdef HINTS_SANITY
if (hint == TILEROWHINT_BROKEN)
g_error ("BROKEN y=%d", y);
if (hint == TILEROWHINT_OUTOFRANGE)
g_error ("OOR y=%d", y);
if (hint == TILEROWHINT_UNDEFINED)
g_error ("UNDEFINED y=%d - bpp=%d ew=%d eh=%d",
y, bpp, ewidth, eheight);
#endif
#ifdef HINTS_SANITY
if (hint == TILEROWHINT_TRANSPARENT ||
hint == TILEROWHINT_MIXED ||
hint == TILEROWHINT_OPAQUE)
{
goto next_row4;
}
if (hint != TILEROWHINT_UNKNOWN)
{
g_error ("MEGABOGUS y=%d - bpp=%d ew=%d eh=%d",
y, bpp, ewidth, eheight);
}
#endif
if (hint == TILEROWHINT_UNKNOWN)
{
const guchar alpha = ptr[3];
/* row is all-opaque or all-transparent? */
if (alpha == 0 || alpha == 255)
{
if (ewidth > 1)
{
for (x = 1; x < ewidth; x++)
{
if (ptr[x * 4 + 3] != alpha)
{
tile_set_rowhint (tile, y, TILEROWHINT_MIXED);
goto next_row4;
}
}
}
tile_set_rowhint (tile, y,
(alpha == 0) ?
TILEROWHINT_TRANSPARENT :
TILEROWHINT_OPAQUE);
}
else
{
tile_set_rowhint (tile, y, TILEROWHINT_MIXED);
}
}
next_row4:
ptr += 4 * ewidth;
}
break;
case 2:
#ifdef HINTS_SANITY
g_assert (tile != NULL);
#endif
ptr = tile_data_pointer (tile, 0, start);
#ifdef HINTS_SANITY
g_assert (ptr != NULL);
#endif
for (y = start; y < start + rows; y++)
{
TileRowHint hint = tile_get_rowhint (tile, y);
#ifdef HINTS_SANITY
if (hint == TILEROWHINT_BROKEN)
g_error ("BROKEN y=%d",y);
if (hint == TILEROWHINT_OUTOFRANGE)
g_error ("OOR y=%d",y);
if (hint == TILEROWHINT_UNDEFINED)
g_error ("UNDEFINED y=%d - bpp=%d ew=%d eh=%d",
y, bpp, ewidth, eheight);
#endif
#ifdef HINTS_SANITY
if (hint == TILEROWHINT_TRANSPARENT ||
hint == TILEROWHINT_MIXED ||
hint == TILEROWHINT_OPAQUE)
{
goto next_row2;
}
if (hint != TILEROWHINT_UNKNOWN)
{
g_error ("MEGABOGUS y=%d - bpp=%d ew=%d eh=%d",
y, bpp, ewidth, eheight);
}
#endif
if (hint == TILEROWHINT_UNKNOWN)
{
const guchar alpha = ptr[1];
/* row is all-opaque or all-transparent? */
if (alpha == 0 || alpha == 255)
{
if (ewidth > 1)
{
for (x = 1; x < ewidth; x++)
{
if (ptr[x * 2 + 1] != alpha)
{
tile_set_rowhint (tile, y, TILEROWHINT_MIXED);
goto next_row2;
}
}
}
tile_set_rowhint (tile, y,
(alpha == 0) ?
TILEROWHINT_TRANSPARENT :
TILEROWHINT_OPAQUE);
}
else
{
tile_set_rowhint (tile, y, TILEROWHINT_MIXED);
}
}
next_row2:
ptr += 2 * ewidth;
}
break;
default:
g_return_if_reached ();
break;
}
}
static void
find_empty_segs (PixelRegion *maskPR,
gint scanline,
gint empty_segs[],
gint max_empty,
gint *num_empty,
BoundaryType type,
gint x1,
gint y1,
gint x2,
gint y2,
guchar threshold)
{
const guchar *data = NULL;
Tile *tile = NULL;
gint start = 0;
gint end = 0;
gint endx = 0;
gint bpp = 0;
gint tilex = -1;
gint last = -1;
gint l_num_empty;
gint x;
*num_empty = 0;
if (scanline < maskPR->y || scanline >= (maskPR->y + maskPR->h))
{
empty_segs[(*num_empty)++] = 0;
empty_segs[(*num_empty)++] = G_MAXINT;
return;
}
if (type == BOUNDARY_WITHIN_BOUNDS)
{
if (scanline < y1 || scanline >= y2)
{
empty_segs[(*num_empty)++] = 0;
empty_segs[(*num_empty)++] = G_MAXINT;
return;
}
start = x1;
end = x2;
}
else if (type == BOUNDARY_IGNORE_BOUNDS)
{
start = maskPR->x;
end = maskPR->x + maskPR->w;
if (scanline < y1 || scanline >= y2)
x2 = -1;
}
empty_segs[(*num_empty)++] = 0;
l_num_empty = *num_empty;
bpp = maskPR->bytes;
if (! maskPR->tiles)
{
data = maskPR->data + scanline * maskPR->rowstride;
endx = end;
}
for (x = start; x < end;)
{
/* Check to see if we must advance to next tile */
if (maskPR->tiles)
{
if ((x / TILE_WIDTH) != tilex)
{
if (tile)
tile_release (tile, FALSE);
tile = tile_manager_get_tile (maskPR->tiles,
x, scanline, TRUE, FALSE);
data = ((const guchar *) tile_data_pointer (tile, x, scanline) +
bpp - 1);
tilex = x / TILE_WIDTH;
}
endx = x + (TILE_WIDTH - (x % TILE_WIDTH));
endx = MIN (end, endx);
}
if (type == BOUNDARY_IGNORE_BOUNDS && (endx > x1 || x < x2))
{
for (; x < endx; x++)
{
gint val;
if (*data > threshold)
{
if (x >= x1 && x < x2)
val = -1;
else
val = 1;
}
else
{
val = -1;
}
data += bpp;
if (last != val)
empty_segs[l_num_empty++] = x;
last = val;
}
}
else
{
for (; x < endx; x++)
{
gint val;
if (*data > threshold)
val = 1;
else
val = -1;
data += bpp;
if (last != val)
empty_segs[l_num_empty++] = x;
last = val;
}
}
}
*num_empty = l_num_empty;
if (last > 0)
empty_segs[(*num_empty)++] = x;
empty_segs[(*num_empty)++] = G_MAXINT;
if (tile)
tile_release (tile, FALSE);
}
TempBuf *
gimp_paint_core_get_orig_proj (GimpPaintCore *core,
GimpPickable *pickable,
gint x,
gint y,
gint width,
gint height)
{
TileManager *src_tiles;
PixelRegion srcPR;
PixelRegion destPR;
Tile *saved_tile;
gboolean release_tile;
gint h;
gint pixelwidth;
gint pickable_width;
gint pickable_height;
const guchar *s;
guchar *d;
gpointer pr;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), NULL);
g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
g_return_val_if_fail (core->saved_proj_tiles != NULL, NULL);
core->orig_proj_buf = temp_buf_resize (core->orig_proj_buf,
gimp_pickable_get_bytes (pickable),
x, y, width, height);
src_tiles = gimp_pickable_get_tiles (pickable);
pickable_width = tile_manager_width (src_tiles);
pickable_height = tile_manager_height (src_tiles);
gimp_rectangle_intersect (x, y,
width, height,
0, 0,
pickable_width, pickable_height,
&x, &y,
&width, &height);
/* configure the pixel regions */
pixel_region_init (&srcPR, src_tiles,
x, y, width, height,
FALSE);
pixel_region_init_temp_buf (&destPR, core->orig_proj_buf,
x - core->orig_proj_buf->x,
y - core->orig_proj_buf->y,
width, height);
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
/* If the saved tile corresponding to this location is valid, use it */
saved_tile = tile_manager_get_tile (core->saved_proj_tiles,
srcPR.x, srcPR.y,
FALSE, FALSE);
if (tile_is_valid (saved_tile))
{
release_tile = TRUE;
saved_tile = tile_manager_get_tile (core->saved_proj_tiles,
srcPR.x, srcPR.y,
TRUE, FALSE);
s = tile_data_pointer (saved_tile, srcPR.x, srcPR.y);
}
else
{
release_tile = FALSE;
s = srcPR.data;
}
d = destPR.data;
pixelwidth = srcPR.w * srcPR.bytes;
h = srcPR.h;
while (h --)
{
memcpy (d, s, pixelwidth);
s += srcPR.rowstride;
d += destPR.rowstride;
}
if (release_tile)
tile_release (saved_tile, FALSE);
}
return core->orig_proj_buf;
}
static void
tile_pyramid_write_quarter (Tile *dest,
Tile *src,
gint i,
gint j)
{
const guchar *src_data = tile_data_pointer (src, 0, 0);
guchar *dest_data = tile_data_pointer (dest, 0, 0);
const gint src_ewidth = tile_ewidth (src);
const gint src_eheight = tile_eheight (src);
const gint dest_ewidth = tile_ewidth (dest);
const gint bpp = tile_bpp (dest);
gint y;
/* Adjust dest pointer to the right quadrant. */
dest_data += i * bpp * (TILE_WIDTH / 2) +
j * bpp * dest_ewidth * (TILE_HEIGHT / 2);
for (y = 0; y < src_eheight / 2; y++)
{
const guchar *src0 = src_data;
const guchar *src1 = src_data + bpp;
const guchar *src2 = src0 + bpp * src_ewidth;
const guchar *src3 = src1 + bpp * src_ewidth;
guchar *dst = dest_data;
gint x;
switch (bpp)
{
case 1:
for (x = 0; x < src_ewidth / 2; x++)
{
dst[0] = (src0[0] + src1[0] + src2[0] + src3[0]) >> 2;
dst += 1;
src0 += 2;
src1 += 2;
src2 += 2;
src3 += 2;
}
break;
case 2:
for (x = 0; x < src_ewidth / 2; x++)
{
guint a = src0[1] + src1[1] + src2[1] + src3[1];
switch (a)
{
case 0: /* all transparent */
dst[0] = dst[1] = 0;
break;
case 1020: /* all opaque */
dst[0] = (src0[0] + src1[0] + src2[0] + src3[0]) >> 2;
dst[1] = 255;
break;
default:
dst[0] = ((src0[0] * src0[1] +
src1[0] * src1[1] +
src2[0] * src2[1] +
src3[0] * src3[1]) / a);
dst[1] = (a + 2) >> 2;
break;
}
dst += 2;
src0 += 4;
src1 += 4;
src2 += 4;
src3 += 4;
}
break;
case 3:
for (x = 0; x < src_ewidth / 2; x++)
{
dst[0] = (src0[0] + src1[0] + src2[0] + src3[0]) >> 2;
dst[1] = (src0[1] + src1[1] + src2[1] + src3[1]) >> 2;
dst[2] = (src0[2] + src1[2] + src2[2] + src3[2]) >> 2;
dst += 3;
src0 += 6;
src1 += 6;
src2 += 6;
src3 += 6;
}
break;
case 4:
for (x = 0; x < src_ewidth / 2; x++)
{
guint a = src0[3] + src1[3] + src2[3] + src3[3];
switch (a)
{
case 0: /* all transparent */
dst[0] = dst[1] = dst[2] = dst[3] = 0;
break;
case 1020: /* all opaque */
dst[0] = (src0[0] + src1[0] + src2[0] + src3[0]) >> 2;
dst[1] = (src0[1] + src1[1] + src2[1] + src3[1]) >> 2;
dst[2] = (src0[2] + src1[2] + src2[2] + src3[2]) >> 2;
dst[3] = 255;
break;
default:
dst[0] = ((src0[0] * src0[3] +
src1[0] * src1[3] +
src2[0] * src2[3] +
src3[0] * src3[3]) / a);
dst[1] = ((src0[1] * src0[3] +
src1[1] * src1[3] +
src2[1] * src2[3] +
src3[1] * src3[3]) / a);
dst[2] = ((src0[2] * src0[3] +
src1[2] * src1[3] +
src2[2] * src2[3] +
src3[2] * src3[3]) / a);
dst[3] = (a + 2) >> 2;
break;
}
dst += 4;
src0 += 8;
src1 += 8;
src2 += 8;
src3 += 8;
}
break;
}
dest_data += dest_ewidth * bpp;
src_data += src_ewidth * bpp * 2;
}
}