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now that blend_pixels() behaves correctly, we can simply initialize the 

2003-06-09  Sven Neumann  <sven@gimp.org>

	* app/paint/gimpsmudge.c (gimp_smudge_start): now that
	blend_pixels() behaves correctly, we can simply initialize the
	smudge buffer with transparent pixels.
This commit is contained in:
Sven Neumann 2003-06-09 15:24:30 +00:00 committed by Sven Neumann
parent 32bab29f18
commit 58b975a4f2
2 changed files with 17 additions and 68 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2003-06-09 Sven Neumann <sven@gimp.org>
* app/paint/gimpsmudge.c (gimp_smudge_start): now that
blend_pixels() behaves correctly, we can simply initialize the
smudge buffer with transparent pixels.
2003-06-09 Sven Neumann <sven@gimp.org>
* app/paint-funcs/paint-funcs-generic.h (blend_pixels): weight

77
app/paint/gimpsmudge.c
View File

@ -60,11 +60,6 @@ static void gimp_smudge_nonclipped_painthit_coords (GimpPaintCore *paint_core,
gint *y,
gint *w,
gint *h);
static void gimp_smudge_allocate_accum_buffer (GimpSmudge *smudge,
gint w,
gint h,
gint bytes,
guchar *do_fill);
static GimpPaintCoreClass *parent_class = NULL;
@ -199,8 +194,6 @@ gimp_smudge_start (GimpPaintCore *paint_core,
TempBuf *area;
PixelRegion srcPR;
gint x, y, w, h;
gint was_clipped;
guchar *do_fill = NULL;
smudge = GIMP_SMUDGE (paint_core);
@ -218,32 +211,9 @@ gimp_smudge_start (GimpPaintCore *paint_core,
/* adjust the x and y coordinates to the upper left corner of the brush */
gimp_smudge_nonclipped_painthit_coords (paint_core, &x, &y, &w, &h);
if (x != area->x || y != area->y || w != area->width || h != area->height)
was_clipped = TRUE;
else
was_clipped = FALSE;
/* When clipped, accum_data may contain pixels that map to
off-canvas pixels of the under-the-brush image, particulary
when the brush image contains an edge or corner of the
image. These off-canvas pixels are not a part of the current
composite, but may be composited in later generations. do_fill
contains a copy of the color of the pixel at the center of the
brush; assumed this is a reasonable choice for off- canvas pixels
that may enter into the blend */
if (was_clipped)
do_fill = gimp_drawable_get_color_at
(drawable,
CLAMP ((gint) paint_core->cur_coords.x,
0, gimp_item_width (GIMP_ITEM (drawable)) - 1),
CLAMP ((gint) paint_core->cur_coords.y,
0, gimp_item_height (GIMP_ITEM (drawable)) - 1));
gimp_smudge_allocate_accum_buffer (smudge,
w, h,
gimp_drawable_bytes (drawable),
do_fill);
/* Allocate the accumulation buffer */
smudge->accumPR.bytes = gimp_drawable_bytes (drawable);
smudge->accum_data = g_malloc0 (w * h * smudge->accumPR.bytes);
smudge->accumPR.x = area->x - x;
smudge->accumPR.y = area->y - y;
@ -269,9 +239,6 @@ gimp_smudge_start (GimpPaintCore *paint_core,
smudge->accumPR.rowstride * smudge->accumPR.y +
smudge->accumPR.x * smudge->accumPR.bytes);
if (do_fill)
g_free (do_fill);
return TRUE;
}
@ -310,15 +277,14 @@ gimp_smudge_motion (GimpPaintCore *paint_core,
if (! (area = gimp_paint_core_get_paint_area (paint_core, drawable, 1.0)))
return;
/* srcPR will be the pixels under the current painthit from
the drawable*/
/* srcPR will be the pixels under the current painthit from the drawable */
pixel_region_init (&srcPR, gimp_drawable_data (drawable),
area->x, area->y, area->width, area->height, FALSE);
/* Enable pressure sensitive rate */
if (pressure_options->rate)
rate = MIN (options->rate / 100.0 * paint_core->cur_coords.pressure * 2.0, 1.0);
rate = MIN (options->rate / 100.0 * paint_core->cur_coords.pressure * 2.0,
1.0);
else
rate = options->rate / 100.0;
@ -393,33 +359,10 @@ gimp_smudge_nonclipped_painthit_coords (GimpPaintCore *paint_core,
gint *h)
{
/* Note: these are the brush mask size plus a border of 1 pixel */
*x = (gint) paint_core->cur_coords.x - paint_core->brush->mask->width / 2 - 1;
*y = (gint) paint_core->cur_coords.y - paint_core->brush->mask->height / 2 - 1;
*x =
(gint) paint_core->cur_coords.x - paint_core->brush->mask->width / 2 - 1;
*y =
(gint) paint_core->cur_coords.y - paint_core->brush->mask->height / 2 - 1;
*w = paint_core->brush->mask->width + 2;
*h = paint_core->brush->mask->height + 2;
}
static void
gimp_smudge_allocate_accum_buffer (GimpSmudge *smudge,
gint w,
gint h,
gint bytes,
guchar *do_fill)
{
/* Allocate the accumulation buffer */
smudge->accumPR.bytes = bytes;
smudge->accum_data = g_malloc (w * h * bytes);
if (do_fill != NULL)
{
/* guchar color[3] = {0,0,0}; */
smudge->accumPR.x = 0;
smudge->accumPR.y = 0;
smudge->accumPR.w = w;
smudge->accumPR.h = h;
smudge->accumPR.rowstride = smudge->accumPR.bytes * w;
smudge->accumPR.data = smudge->accum_data;
color_region (&smudge->accumPR, (const guchar *) do_fill);
}
}