static void
preview_update (GtkWidget *widget)
{
GimpPixelRgn src_rgn; /* Source image region */
guchar *dst; /* Output image */
GimpPreview *preview; /* The preview widget */
guchar *src; /* Source pixel rows */
gint img_bpp;
gint x1,y1;
gint width, height;
preview = GIMP_PREVIEW (widget);
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
gimp_preview_get_size (preview, &width, &height);
gimp_preview_get_position (preview, &x1, &y1);
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
dst = g_new (guchar, width * height * img_bpp);
src = g_new (guchar, width * height * img_bpp);
gimp_pixel_rgn_get_rect (&src_rgn, src, x1, y1, width, height);
despeckle_median (src, dst, width, height, img_bpp, despeckle_radius, TRUE);
gimp_preview_draw_buffer (preview, dst, width * img_bpp);
g_free (src);
g_free (dst);
}
static void
preview_update_preview (GimpPreview *preview,
GimpDrawable *drawable)
{
gint x1, y1;
gint width, height;
gint bpp;
guchar *buffer;
GimpPixelRgn src_rgn;
GimpPixelRgn preview_rgn;
gint32 image_id, src_image_id;
gint32 preview_id;
GimpDrawable *preview_drawable;
bpp = gimp_drawable_bpp (drawable->drawable_id);
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
buffer = g_new (guchar, width * height * bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_get_rect (&src_rgn, buffer,
x1, y1, width, height);
/* set up gimp drawable for rendering preview into */
src_image_id = gimp_drawable_get_image (drawable->drawable_id);
image_id = gimp_image_new (width, height,
gimp_image_base_type (src_image_id));
preview_id = gimp_layer_new (image_id, "preview", width, height,
gimp_drawable_type (drawable->drawable_id),
100,
GIMP_NORMAL_MODE);
preview_drawable = gimp_drawable_get (preview_id);
gimp_image_add_layer (image_id, preview_id, 0);
gimp_layer_set_offsets (preview_id, 0, 0);
gimp_pixel_rgn_init (&preview_rgn, preview_drawable,
0, 0, width, height, TRUE, TRUE);
gimp_pixel_rgn_set_rect (&preview_rgn, buffer,
0, 0, width, height);
gimp_drawable_flush (preview_drawable);
gimp_drawable_merge_shadow (preview_id, TRUE);
gimp_drawable_update (preview_id, 0, 0, width, height);
dog (image_id, preview_drawable, dogvals.inner, dogvals.outer, FALSE);
gimp_pixel_rgn_get_rect (&preview_rgn, buffer,
0, 0, width, height);
gimp_preview_draw_buffer (preview, buffer, width * bpp);
gimp_image_delete (image_id);
g_free (buffer);
}
// Combine wavelets with latest FFT result and show output in the preview widget
void wavelet_preview(PluginData *pd)
{
int x, y, w, h;
gimp_preview_get_position (GIMP_PREVIEW(pd->preview), &x, &y);
gimp_preview_get_size (GIMP_PREVIEW(pd->preview), &w, &h);
gimp_pixel_rgn_init (&pd->region, pd->drawable, 0, 0, pd->image_width, pd->image_height, FALSE, TRUE);
wavelet_apply(pd, x, y, w, h);
gimp_pixel_rgn_set_rect(&pd->region, pd->img_pixels, x, y, w, h);
gimp_drawable_preview_draw_region(GIMP_DRAWABLE_PREVIEW(pd->preview), &pd->region);
}
static void
mblur (GimpDrawable *drawable,
GimpPreview *preview)
{
gint x, y;
gint width, height;
if (preview)
{
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id,
&x, &y, &width, &height);
width -= x;
height -= y;
}
if (width < 1 || height < 1)
return;
if (! preview)
gimp_progress_init (_("Motion blurring"));
switch (mbvals.mblur_type)
{
case MBLUR_LINEAR:
mblur_linear (drawable, preview, x, y, width, height);
break;
case MBLUR_RADIAL:
mblur_radial (drawable, preview, x, y, width, height);
break;
case MBLUR_ZOOM:
mblur_zoom (drawable, preview, x, y, width, height);
break;
default:
break;
}
if (! preview)
{
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x, y, width, height);
}
}
static void
color_to_alpha_preview (GimpPreview *preview,
GimpDrawable *drawable)
{
GimpPixelRgn src_rgn;
gint x, y;
gint width, height;
gint bpp;
gint i;
guchar *src, *dest;
bpp = drawable->bpp;
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
dest = g_new (guchar, width * height * 4);
src = g_new (guchar, width * height * bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
x, y, width, height,
FALSE, FALSE);
gimp_pixel_rgn_get_rect (&src_rgn, src, x, y, width, height);
for (i = 0; i < width * height; i++)
to_alpha_func (src + i * bpp, dest + i * 4, bpp, NULL);
g_free (src);
/* Our code assumes that the drawable has an alpha channel (and adds
* one later if the effect is actually performed). For that reason
* we have to take care when drawing the preview.
*/
if (bpp == 4)
{
gimp_preview_draw_buffer (preview, dest, width * 4);
}
else
{
/* This is not correct because we ignore the selection, but it
* is the best we can easily do.
*/
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
0, 0, width, height,
GIMP_RGBA_IMAGE, dest, width * 4);
}
g_free (dest);
}
/*
* Handle the expose event on the preview
*/
static gboolean
nova_center_preview_expose (GtkWidget *widget,
GdkEvent *event,
NovaCenter *center)
{
if (show_cursor)
{
cairo_t *cr;
gint x, y, offx, offy;
gint width, height;
GimpPreviewArea *area = GIMP_PREVIEW_AREA (center->preview->area);
GtkAllocation allocation;
cr = gdk_cairo_create (gtk_widget_get_window (center->preview->area));
gimp_preview_transform (center->preview,
pvals.xcenter, pvals.ycenter,
&x, &y);
gtk_widget_get_allocation (GTK_WIDGET (area), &allocation);
offx = (allocation.width - area->width) / 2;
offy = (allocation.height - area->height) / 2;
gimp_preview_get_size (center->preview, &width, &height);
cairo_move_to (cr, offx + x + 0.5, 0);
cairo_line_to (cr, offx + x + 0.5, allocation.height);
cairo_move_to (cr, 0, offy + y + 0.5);
cairo_line_to (cr, allocation.width, offy + y + 0.5);
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
cairo_stroke_preserve (cr);
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
cairo_stroke (cr);
cairo_destroy (cr);
}
return FALSE;
}
static void
spread_preview_update (GimpPreview *preview,
GtkWidget *size)
{
GimpDrawable *drawable;
SpreadParam_t param;
gint x, y, bpp;
guchar *buffer, *dest;
gint x_off, y_off;
gint width, height;
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
param.pft = gimp_pixel_fetcher_new (drawable, FALSE);
param.gr = g_rand_new ();
param.x_amount = (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size),
0) + 1) / 2;
param.y_amount = (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size),
1) + 1) / 2;
param.width = drawable->width;
param.height = drawable->height;
gimp_preview_get_size (preview, &width, &height);
bpp = drawable->bpp;
dest = buffer = g_new (guchar, width * height * bpp);
gimp_preview_get_position (preview, &x_off, &y_off);
for (y = 0 ; y < height ; y++)
for (x = 0 ; x < width ; x++)
{
spread_func (x + x_off, y + y_off, dest, bpp, ¶m);
dest += bpp;
}
gimp_preview_draw_buffer (preview, buffer, width * bpp);
g_free (buffer);
g_rand_free (param.gr);
}
static void
nova_center_cursor_draw (NovaCenter *center)
{
GtkWidget *prvw = center->preview->area;
gint width, height;
gimp_preview_get_size (center->preview, &width, &height);
gdk_gc_set_function (prvw->style->black_gc, GDK_INVERT);
if (show_cursor)
{
if (center->cursor_drawn)
{
gdk_draw_line (prvw->window,
prvw->style->black_gc,
center->oldx, 1, center->oldx,
height - 1);
gdk_draw_line (prvw->window,
prvw->style->black_gc,
1, center->oldy,
width - 1, center->oldy);
}
gdk_draw_line (prvw->window,
prvw->style->black_gc,
center->curx, 1, center->curx,
height - 1);
gdk_draw_line (prvw->window,
prvw->style->black_gc,
1, center->cury,
width - 1, center->cury);
}
/* current position of cursor is updated */
center->oldx = center->curx;
center->oldy = center->cury;
center->cursor_drawn = TRUE;
gdk_gc_set_function (prvw->style->black_gc, GDK_COPY);
}
static void preview_update (GimpPreview *preview)
{
GimpDrawable *drawable;
gint x, y;
gint width, height;
GimpPixelRgn srcPR;
GimpPixelRgn destPR;
drawable = gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
gimp_pixel_rgn_init ( &srcPR, drawable, 0, 0, drawable->width, drawable->height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, drawable->width, drawable->height, TRUE, TRUE);
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
octave_region (&srcPR, &destPR, drawable->bpp, x, y, width, height);
gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, FALSE, TRUE);
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview), &destPR);
}
static void
preview_update (GimpPreview *preview)
{
GimpDrawable *drawable;
gint x1, x2;
gint y1, y2;
gint x, y;
gint width, height;
gint border;
GimpPixelRgn srcPR;
GimpPixelRgn destPR;
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
gimp_pixel_rgn_init (&srcPR, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable,
0, 0, drawable->width, drawable->height, TRUE, TRUE);
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
/* enlarge the region to avoid artefacts at the edges of the preview */
border = 2.0 * c2g_params.radius + 0.5;
if (border > width/2) border = width/2; //Speed up preview
x1 = MAX (0, x - border);
y1 = MAX (0, y - border);
x2 = MIN (x + width + border, drawable->width);
y2 = MIN (y + height + border, drawable->height);
c2g_region (&srcPR, &destPR, drawable->bpp,
c2g_params.radius, c2g_params.amount, c2g_params.gamma,
x1, x2, y1, y2,
FALSE);
gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, FALSE, TRUE);
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview), &destPR);
}
static void
sobel (GimpDrawable *drawable,
gboolean do_horizontal,
gboolean do_vertical,
gboolean keep_sign,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
gint gradient, hor_gradient, ver_gradient;
guchar *dest, *d;
guchar *prev_row, *pr;
guchar *cur_row, *cr;
guchar *next_row, *nr;
guchar *tmp;
gint row, col;
gint x1, y1, x2, y2;
gboolean alpha;
gint counter;
guchar *preview_buffer = NULL;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
gimp_progress_init (_("Sobel edge detecting"));
width = x2 - x1;
height = y2 - y1;
}
/* Get the size of the input image. (This will/must be the same
* as the size of the output image.
*/
bytes = drawable->bpp;
alpha = gimp_drawable_has_alpha (drawable->drawable_id);
/* allocate row buffers */
prev_row = g_new (guchar, (width + 2) * bytes);
cur_row = g_new (guchar, (width + 2) * bytes);
next_row = g_new (guchar, (width + 2) * bytes);
dest = g_new (guchar, width * bytes);
/* initialize the pixel regions */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0,
drawable->width, drawable->height,
FALSE, FALSE);
if (preview)
{
preview_buffer = g_new (guchar, width * height * bytes);
}
else
{
gimp_pixel_rgn_init (&destPR, drawable, 0, 0,
drawable->width, drawable->height,
TRUE, TRUE);
}
pr = prev_row + bytes;
cr = cur_row + bytes;
nr = next_row + bytes;
sobel_prepare_row (&srcPR, pr, x1, y1 - 1, width);
sobel_prepare_row (&srcPR, cr, x1, y1, width);
counter =0;
/* loop through the rows, applying the sobel convolution */
for (row = y1; row < y2; row++)
{
/* prepare the next row */
sobel_prepare_row (&srcPR, nr, x1, row + 1, width);
d = dest;
for (col = 0; col < width * bytes; col++)
{
hor_gradient = (do_horizontal ?
((pr[col - bytes] + 2 * pr[col] + pr[col + bytes]) -
(nr[col - bytes] + 2 * nr[col] + nr[col + bytes]))
: 0);
ver_gradient = (do_vertical ?
((pr[col - bytes] + 2 * cr[col - bytes] + nr[col - bytes]) -
(pr[col + bytes] + 2 * cr[col + bytes] + nr[col + bytes]))
: 0);
gradient = (do_vertical && do_horizontal) ?
(ROUND (RMS (hor_gradient, ver_gradient)) / 5.66) /* always >0 */
: (keep_sign ? (127 + (ROUND ((hor_gradient + ver_gradient) / 8.0)))
: (ROUND (abs (hor_gradient + ver_gradient) / 4.0)));
if (alpha && (((col + 1) % bytes) == 0))
{ /* the alpha channel */
*d++ = (counter == 0) ? 0 : 255;
counter = 0;
}
else
{
*d++ = gradient;
if (gradient > 10) counter ++;
}
}
/* shuffle the row pointers */
tmp = pr;
pr = cr;
cr = nr;
nr = tmp;
/* store the dest */
if (preview)
{
memcpy (preview_buffer + width * (row - y1) * bytes,
dest,
width * bytes);
}
else
{
gimp_pixel_rgn_set_row (&destPR, dest, x1, row, width);
if ((row % 20) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, preview_buffer, width * bytes);
g_free (preview_buffer);
}
else
{
gimp_progress_update (1.0);
/* update the sobeled region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
g_free (prev_row);
g_free (cur_row);
g_free (next_row);
g_free (dest);
}
/*
* Photocopy algorithm
* -----------------
* Mask radius = radius of pixel neighborhood for intensity comparison
* Threshold = relative intensity difference which will result in darkening
* Ramp = amount of relative intensity difference before total black
* Blur radius = mask radius / 3.0
*
* Algorithm:
* For each pixel, calculate pixel intensity value to be: avg (blur radius)
* relative diff = pixel intensity / avg (mask radius)
* If relative diff < Threshold
* intensity mult = (Ramp - MIN (Ramp, (Threshold - relative diff))) / Ramp
* pixel intensity *= intensity mult
* Else
* pixel intensity = white
*/
static void
photocopy (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
GimpPixelRgn *pr;
gint width, height;
gint bytes;
gboolean has_alpha;
guchar *dest1;
guchar *dest2;
guchar *src1, *sp_p1, *sp_m1;
guchar *src2, *sp_p2, *sp_m2;
gdouble n_p1[5], n_m1[5];
gdouble n_p2[5], n_m2[5];
gdouble d_p1[5], d_m1[5];
gdouble d_p2[5], d_m2[5];
gdouble bd_p1[5], bd_m1[5];
gdouble bd_p2[5], bd_m2[5];
gdouble *val_p1, *val_m1, *vp1, *vm1;
gdouble *val_p2, *val_m2, *vp2, *vm2;
gint x1, y1;
gint i, j;
gint row, col;
gint terms;
gint progress, max_progress;
gint initial_p1[4];
gint initial_p2[4];
gint initial_m1[4];
gint initial_m2[4];
gdouble radius;
gdouble val;
gdouble std_dev1;
gdouble std_dev2;
gdouble ramp_down;
gdouble ramp_up;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
}
else
{
gint x2, y2;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
bytes = drawable->bpp;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
val_p1 = g_new (gdouble, MAX (width, height));
val_p2 = g_new (gdouble, MAX (width, height));
val_m1 = g_new (gdouble, MAX (width, height));
val_m2 = g_new (gdouble, MAX (width, height));
dest1 = g_new0 (guchar, width * height);
dest2 = g_new0 (guchar, width * height);
progress = 0;
max_progress = width * height * 3;
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &src_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
guchar *src_ptr = src_rgn.data;
guchar *dest_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
for (row = 0; row < src_rgn.h; row++)
{
for (col = 0; col < src_rgn.w; col++)
{
/* desaturate */
if (bytes > 2)
dest_ptr[col] = (guchar) gimp_rgb_to_l_int (src_ptr[col * bytes + 0],
src_ptr[col * bytes + 1],
src_ptr[col * bytes + 2]);
else
dest_ptr[col] = (guchar) src_ptr[col * bytes];
/* compute transfer */
val = pow (dest_ptr[col], (1.0 / GAMMA));
dest_ptr[col] = (guchar) CLAMP (val, 0, 255);
}
src_ptr += src_rgn.rowstride;
dest_ptr += width;
}
if (!preview)
{
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
/* Calculate the standard deviations */
radius = MAX (1.0, 10 * (1.0 - pvals.sharpness));
radius = fabs (radius) + 1.0;
std_dev1 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
radius = fabs (pvals.mask_radius) + 1.0;
std_dev2 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
/* derive the constants for calculating the gaussian from the std dev */
find_constants (n_p1, n_m1, d_p1, d_m1, bd_p1, bd_m1, std_dev1);
find_constants (n_p2, n_m2, d_p2, d_m2, bd_p2, bd_m2, std_dev2);
/* First the vertical pass */
for (col = 0; col < width; col++)
{
memset (val_p1, 0, height * sizeof (gdouble));
memset (val_p2, 0, height * sizeof (gdouble));
memset (val_m1, 0, height * sizeof (gdouble));
memset (val_m2, 0, height * sizeof (gdouble));
src1 = dest1 + col;
sp_p1 = src1;
sp_m1 = src1 + (height - 1) * width;
vp1 = val_p1;
vp2 = val_p2;
vm1 = val_m1 + (height - 1);
vm2 = val_m2 + (height - 1);
/* Set up the first vals */
initial_p1[0] = sp_p1[0];
initial_m1[0] = sp_m1[0];
for (row = 0; row < height; row++)
{
gdouble *vpptr1, *vmptr1;
gdouble *vpptr2, *vmptr2;
terms = (row < 4) ? row : 4;
vpptr1 = vp1; vmptr1 = vm1;
vpptr2 = vp2; vmptr2 = vm2;
for (i = 0; i <= terms; i++)
{
*vpptr1 += n_p1[i] * sp_p1[-i * width] - d_p1[i] * vp1[-i];
*vmptr1 += n_m1[i] * sp_m1[i * width] - d_m1[i] * vm1[i];
*vpptr2 += n_p2[i] * sp_p1[-i * width] - d_p2[i] * vp2[-i];
*vmptr2 += n_m2[i] * sp_m1[i * width] - d_m2[i] * vm2[i];
}
for (j = i; j <= 4; j++)
{
*vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
*vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];
*vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p1[0];
*vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m1[0];
}
sp_p1 += width;
sp_m1 -= width;
vp1 += 1;
vp2 += 1;
vm1 -= 1;
vm2 -= 1;
}
transfer_pixels (val_p1, val_m1, dest1 + col, width, height);
transfer_pixels (val_p2, val_m2, dest2 + col, width, height);
if (!preview)
{
progress += height;
if ((col % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
for (row = 0; row < height; row++)
{
memset (val_p1, 0, width * sizeof (gdouble));
memset (val_p2, 0, width * sizeof (gdouble));
memset (val_m1, 0, width * sizeof (gdouble));
memset (val_m2, 0, width * sizeof (gdouble));
src1 = dest1 + row * width;
src2 = dest2 + row * width;
sp_p1 = src1;
sp_p2 = src2;
sp_m1 = src1 + width - 1;
sp_m2 = src2 + width - 1;
vp1 = val_p1;
vp2 = val_p2;
vm1 = val_m1 + width - 1;
vm2 = val_m2 + width - 1;
/* Set up the first vals */
initial_p1[0] = sp_p1[0];
initial_p2[0] = sp_p2[0];
initial_m1[0] = sp_m1[0];
initial_m2[0] = sp_m2[0];
for (col = 0; col < width; col++)
{
gdouble *vpptr1, *vmptr1;
gdouble *vpptr2, *vmptr2;
terms = (col < 4) ? col : 4;
vpptr1 = vp1; vmptr1 = vm1;
vpptr2 = vp2; vmptr2 = vm2;
for (i = 0; i <= terms; i++)
{
*vpptr1 += n_p1[i] * sp_p1[-i] - d_p1[i] * vp1[-i];
*vmptr1 += n_m1[i] * sp_m1[i] - d_m1[i] * vm1[i];
*vpptr2 += n_p2[i] * sp_p2[-i] - d_p2[i] * vp2[-i];
*vmptr2 += n_m2[i] * sp_m2[i] - d_m2[i] * vm2[i];
}
for (j = i; j <= 4; j++)
{
*vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
*vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];
*vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p2[0];
*vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m2[0];
}
sp_p1 ++;
sp_p2 ++;
sp_m1 --;
sp_m2 --;
vp1 ++;
vp2 ++;
vm1 --;
vm2 --;
}
transfer_pixels (val_p1, val_m1, dest1 + row * width, 1, width);
transfer_pixels (val_p2, val_m2, dest2 + row * width, 1, width);
if (!preview)
{
progress += width;
if ((row % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
/* Compute the ramp value which sets 'pct_black' % of the darkened pixels black */
ramp_down = compute_ramp (dest1, dest2, width * height, pvals.pct_black, 1);
ramp_up = compute_ramp (dest1, dest2, width * height, 1.0 - pvals.pct_white, 0);
/* Initialize the pixel regions. */
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, width, height,
(preview == NULL), TRUE);
pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
while (pr)
{
guchar *src_ptr = src_rgn.data;
guchar *dest_ptr = dest_rgn.data;
guchar *blur_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
guchar *avg_ptr = dest2 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
gdouble diff, mult;
gdouble lightness = 0.0;
for (row = 0; row < src_rgn.h; row++)
{
for (col = 0; col < src_rgn.w; col++)
{
if (avg_ptr[col] > EPSILON)
{
diff = (gdouble) blur_ptr[col] / (gdouble) avg_ptr[col];
if (diff < pvals.threshold)
{
if (ramp_down == 0.0)
mult = 0.0;
else
mult = (ramp_down - MIN (ramp_down,
(pvals.threshold - diff))) / ramp_down;
lightness = CLAMP (blur_ptr[col] * mult, 0, 255);
}
else
{
if (ramp_up == 0.0)
mult = 1.0;
else
mult = MIN (ramp_up,
(diff - pvals.threshold)) / ramp_up;
lightness = 255 - (1.0 - mult) * (255 - blur_ptr[col]);
lightness = CLAMP (lightness, 0, 255);
}
}
else
{
lightness = 0;
}
if (bytes < 3)
{
dest_ptr[col * bytes] = (guchar) lightness;
if (has_alpha)
dest_ptr[col * bytes + 1] = src_ptr[col * src_rgn.bpp + 1];
}
else
{
dest_ptr[col * bytes + 0] = lightness;
dest_ptr[col * bytes + 1] = lightness;
dest_ptr[col * bytes + 2] = lightness;
if (has_alpha)
dest_ptr[col * bytes + 3] = src_ptr[col * src_rgn.bpp + 3];
}
}
src_ptr += src_rgn.rowstride;
dest_ptr += dest_rgn.rowstride;
blur_ptr += width;
avg_ptr += width;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
pr = gimp_pixel_rgns_process (pr);
}
if (! preview)
{
/* merge the shadow, update the drawable */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
/* free up buffers */
g_free (val_p1);
g_free (val_p2);
g_free (val_m1);
g_free (val_m2);
g_free (dest1);
g_free (dest2);
}
/* do the exchanging */
static void
exchange (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
guchar min_red, min_green, min_blue;
guchar max_red, max_green, max_blue;
guchar from_red, from_green, from_blue;
guchar to_red, to_green, to_blue;
guchar *src_row, *dest_row;
gint x, y, bpp = drawable->bpp;
gboolean has_alpha;
gint x1, y1, y2;
gint width, height;
GimpRGB min;
GimpRGB max;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
}
else if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&x1, &y1, &width, &height))
{
return;
}
y2 = y1 + height;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
/* allocate memory */
src_row = g_new (guchar, drawable->width * bpp);
gimp_rgb_get_uchar (&xargs.from, &from_red, &from_green, &from_blue);
gimp_rgb_get_uchar (&xargs.to, &to_red, &to_green, &to_blue);
/* get boundary values */
min = xargs.from;
gimp_rgb_subtract (&min, &xargs.threshold);
gimp_rgb_clamp (&min);
gimp_rgb_get_uchar (&min, &min_red, &min_green, &min_blue);
max = xargs.from;
gimp_rgb_add (&max, &xargs.threshold);
gimp_rgb_clamp (&max);
gimp_rgb_get_uchar (&max, &max_red, &max_green, &max_blue);
dest_row = g_new (guchar, drawable->width * bpp);
gimp_pixel_rgn_init (&srcPR, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
for (y = y1; y < y2; y++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, x1, y, width);
for (x = 0; x < width; x++)
{
guchar pixel_red, pixel_green, pixel_blue;
guchar new_red, new_green, new_blue;
guint idx;
/* get current pixel-values */
pixel_red = src_row[x * bpp];
pixel_green = src_row[x * bpp + 1];
pixel_blue = src_row[x * bpp + 2];
idx = x * bpp;
/* want this pixel? */
if (pixel_red >= min_red &&
pixel_red <= max_red &&
pixel_green >= min_green &&
pixel_green <= max_green &&
pixel_blue >= min_blue &&
pixel_blue <= max_blue)
{
guchar red_delta, green_delta, blue_delta;
red_delta = pixel_red > from_red ?
pixel_red - from_red : from_red - pixel_red;
green_delta = pixel_green > from_green ?
pixel_green - from_green : from_green - pixel_green;
blue_delta = pixel_blue > from_blue ?
pixel_blue - from_blue : from_blue - pixel_blue;
new_red = CLAMP (to_red + red_delta, 0, 255);
new_green = CLAMP (to_green + green_delta, 0, 255);
new_blue = CLAMP (to_blue + blue_delta, 0, 255);
}
else
{
new_red = pixel_red;
new_green = pixel_green;
new_blue = pixel_blue;
}
/* fill buffer */
dest_row[idx + 0] = new_red;
dest_row[idx + 1] = new_green;
dest_row[idx + 2] = new_blue;
/* copy alpha-channel */
if (has_alpha)
dest_row[idx + 3] = src_row[x * bpp + 3];
}
/* store the dest */
gimp_pixel_rgn_set_row (&destPR, dest_row, x1, y, width);
/* and tell the user what we're doing */
if (!preview && (y % 10) == 0)
gimp_progress_update ((gdouble) y / (gdouble) height);
}
g_free (src_row);
g_free (dest_row);
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&destPR);
}
else
{
gimp_progress_update (1.0);
/* update the processed region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}
static gboolean
focusblur_fft_buffer_update_source (FblurFftBuffer *fft,
GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn pr;
gsize size;
gint x1, x2, y1, y2;
gint width, height;
gint ntiles;
fft->source.drawable = drawable;
fft->source.preview = preview;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
if (preview)
{
gint px1, px2, py1, py2;
gint pw, ph;
gimp_preview_get_position (GIMP_PREVIEW (preview), &px1, &py1);
gimp_preview_get_size (GIMP_PREVIEW (preview), &pw, &ph);
px2 = px1 + pw;
py2 = py1 + ph;
x1 = MAX (px1, x1);
x2 = MIN (px2, x2);
y1 = MAX (py1, y1);
y2 = MIN (py2, y2);
}
g_assert (x1 < x2);
g_assert (y1 < y2);
width = x2 - x1;
height = y2 - y1;
ntiles = 1 + x2 / TILE_WIDTH - x1 / TILE_WIDTH;
gimp_tile_cache_ntiles (ntiles);
fft->source.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
fft->source.bpp = drawable->bpp;
fft->source.channels = drawable->bpp - (fft->source.has_alpha ? 1 : 0);
fft->source.rowstride = drawable->bpp * width;
size = fft->source.rowstride * height;
if (fft->source.data_preview)
{
if (! preview)
{
g_free (fft->source.data_preview);
fft->source.data_preview = NULL;
}
else if (size != fft->source.size)
{
g_free (fft->source.data_preview);
goto allocate2;
}
}
else
{
allocate2:
if (preview)
{
fft->source.data_preview = g_malloc (size);
if (! fft->source.data_preview)
return FALSE;
}
}
if (fft->source.data)
{
if (size != fft->source.size)
{
g_free (fft->source.data);
goto allocate;
}
}
else
{
allocate:
fft->source.size = size;
fft->source.data = g_malloc (size);
if (! fft->source.data)
return FALSE;
goto reload;
}
if (x1 == fft->source.x1 &&
x2 == fft->source.x2 &&
y1 == fft->source.y1 &&
y2 == fft->source.y2)
return TRUE;
reload:
fft->source.x1 = x1;
fft->source.x2 = x2;
fft->source.y1 = y1;
fft->source.y2 = y2;
fft->source.width = width;
fft->source.height = height;
/* need to recount */
fft->depth.count = 0;
/* load */
gimp_pixel_rgn_init (&pr, drawable, x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_get_rect (&pr, fft->source.data,
fft->source.x1, fft->source.y1,
fft->source.width, fft->source.height);
return TRUE;
}
/*
* For all x and y as requested, replace the pixel at (x,y)
* with a weighted average of the most frequently occurring
* values in a circle of mask_size diameter centered at (x,y).
*/
static void
oilify (GimpDrawable *drawable,
GimpPreview *preview)
{
gboolean use_inten;
gboolean use_msmap = FALSE;
gboolean use_emap = FALSE;
GimpDrawable *mask_size_map_drawable = NULL;
GimpDrawable *exponent_map_drawable = NULL;
GimpPixelRgn mask_size_map_rgn;
GimpPixelRgn exponent_map_rgn;
gint msmap_bpp = 0;
gint emap_bpp = 0;
GimpPixelRgn dest_rgn;
GimpPixelRgn *regions[3];
gint n_regions;
gint bpp;
gint *sqr_lut;
gint x1, y1, x2, y2;
gint width, height;
gint Hist[HISTSIZE];
gint Hist_rgb[4][HISTSIZE];
gpointer pr;
gint progress, max_progress;
guchar *src_buf;
guchar *src_inten_buf = NULL;
gint i;
use_inten = (ovals.mode == MODE_INTEN);
/* Get the selection bounds */
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
progress = 0;
max_progress = width * height;
bpp = drawable->bpp;
/*
* Look-up-table implementation of the square function, for use in the
* VERY TIGHT inner loops
*/
{
gint lut_size = (gint) ovals.mask_size / 2 + 1;
sqr_lut = g_new (gint, lut_size);
for (i = 0; i < lut_size; i++)
sqr_lut[i] = SQR (i);
}
/* Get the map drawables, if applicable */
if (ovals.use_mask_size_map && ovals.mask_size_map >= 0)
{
use_msmap = TRUE;
mask_size_map_drawable = gimp_drawable_get (ovals.mask_size_map);
gimp_pixel_rgn_init (&mask_size_map_rgn, mask_size_map_drawable,
x1, y1, width, height, FALSE, FALSE);
msmap_bpp = mask_size_map_drawable->bpp;
}
if (ovals.use_exponent_map && ovals.exponent_map >= 0)
{
use_emap = TRUE;
exponent_map_drawable = gimp_drawable_get (ovals.exponent_map);
gimp_pixel_rgn_init (&exponent_map_rgn, exponent_map_drawable,
x1, y1, width, height, FALSE, FALSE);
emap_bpp = exponent_map_drawable->bpp;
}
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
{
GimpPixelRgn src_rgn;
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
src_buf = g_new (guchar, width * height * bpp);
gimp_pixel_rgn_get_rect (&src_rgn, src_buf, x1, y1, width, height);
}
/*
* If we're working in intensity mode, then generate a separate intensity
* map of the source image. This way, we can avoid calculating the
* intensity of any given source pixel more than once.
*/
if (use_inten)
{
guchar *src;
guchar *dest;
src_inten_buf = g_new (guchar, width * height);
for (i = 0,
src = src_buf,
dest = src_inten_buf
;
i < (width * height)
;
i++,
src += bpp,
dest++)
{
*dest = (guchar) GIMP_RGB_LUMINANCE (src[0], src[1], src[2]);
}
}
n_regions = 0;
regions[n_regions++] = &dest_rgn;
if (use_msmap)
regions[n_regions++] = &mask_size_map_rgn;
if (use_emap)
regions[n_regions++] = &exponent_map_rgn;
for (pr = gimp_pixel_rgns_register2 (n_regions, regions);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
gint y;
guchar *dest_row;
guchar *src_msmap_row = NULL;
guchar *src_emap_row = NULL;
for (y = dest_rgn.y,
dest_row = dest_rgn.data,
src_msmap_row = mask_size_map_rgn.data, /* valid iff use_msmap */
src_emap_row = exponent_map_rgn.data /* valid iff use_emap */
;
y < (gint) (dest_rgn.y + dest_rgn.h)
;
y++,
dest_row += dest_rgn.rowstride,
src_msmap_row += mask_size_map_rgn.rowstride, /* valid iff use_msmap */
src_emap_row += exponent_map_rgn.rowstride) /* valid iff use_emap */
{
gint x;
guchar *dest;
guchar *src_msmap = NULL;
guchar *src_emap = NULL;
for (x = dest_rgn.x,
dest = dest_row,
src_msmap = src_msmap_row, /* valid iff use_msmap */
src_emap = src_emap_row /* valid iff use_emap */
;
x < (gint) (dest_rgn.x + dest_rgn.w)
;
x++,
dest += bpp,
src_msmap += msmap_bpp, /* valid iff use_msmap */
src_emap += emap_bpp) /* valid iff use_emap */
{
gint radius, radius_squared;
gfloat exponent;
gint mask_x1, mask_y1;
gint mask_x2, mask_y2;
gint mask_y;
gint src_offset;
guchar *src_row;
guchar *src_inten_row = NULL;
if (use_msmap)
{
gfloat factor = get_map_value (src_msmap, msmap_bpp);
radius = ROUND (factor * (0.5 * ovals.mask_size));
}
else
{
radius = (gint) ovals.mask_size / 2;
}
radius_squared = SQR (radius);
exponent = ovals.exponent;
if (use_emap)
exponent *= get_map_value (src_emap, emap_bpp);
if (use_inten)
memset (Hist, 0, sizeof (Hist));
memset (Hist_rgb, 0, sizeof (Hist_rgb));
mask_x1 = CLAMP ((x - radius), x1, x2);
mask_y1 = CLAMP ((y - radius), y1, y2);
mask_x2 = CLAMP ((x + radius + 1), x1, x2);
mask_y2 = CLAMP ((y + radius + 1), y1, y2);
src_offset = (mask_y1 - y1) * width + (mask_x1 - x1);
for (mask_y = mask_y1,
src_row = src_buf + src_offset * bpp,
src_inten_row = src_inten_buf + src_offset /* valid iff use_inten */
;
mask_y < mask_y2
;
mask_y++,
src_row += width * bpp,
src_inten_row += width) /* valid iff use_inten */
{
guchar *src;
guchar *src_inten = NULL;
gint dy_squared = sqr_lut[ABS (mask_y - y)];
gint mask_x;
for (mask_x = mask_x1,
src = src_row,
src_inten = src_inten_row /* valid iff use_inten */
;
mask_x < mask_x2
;
mask_x++,
src += bpp,
src_inten++) /* valid iff use_inten */
{
gint dx_squared = sqr_lut[ABS (mask_x - x)];
gint b;
/* Stay inside a circular mask area */
if ((dx_squared + dy_squared) > radius_squared)
continue;
if (use_inten)
{
gint inten = *src_inten;
++Hist[inten];
for (b = 0; b < bpp; b++)
Hist_rgb[b][inten] += src[b];
}
else
{
for (b = 0; b < bpp; b++)
++Hist_rgb[b][src[b]];
}
} /* for mask_x */
} /* for mask_y */
if (use_inten)
{
weighted_average_color (Hist, Hist_rgb, exponent, dest, bpp);
}
else
{
gint b;
for (b = 0; b < bpp; b++)
dest[b] = weighted_average_value (Hist_rgb[b], exponent);
}
} /* for x */
} /* for y */
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
} /* for pr */
/* Detach from the map drawables */
if (mask_size_map_drawable)
gimp_drawable_detach (mask_size_map_drawable);
if (exponent_map_drawable)
gimp_drawable_detach (exponent_map_drawable);
if (src_inten_buf)
g_free (src_inten_buf);
g_free (src_buf);
g_free (sqr_lut);
if (!preview)
{
/* Update the oil-painted region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}
static void
softglow (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
GimpPixelRgn *pr;
gint width, height;
gint bytes;
gboolean has_alpha;
guchar *dest;
guchar *src, *sp_p, *sp_m;
gdouble n_p[5], n_m[5];
gdouble d_p[5], d_m[5];
gdouble bd_p[5], bd_m[5];
gdouble *val_p, *val_m, *vp, *vm;
gint x1, y1, x2, y2;
gint i, j;
gint row, col, b;
gint terms;
gint progress, max_progress;
gint initial_p[4];
gint initial_m[4];
gint tmp;
gdouble radius;
gdouble std_dev;
gdouble val;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = (x2 - x1);
height = (y2 - y1);
}
bytes = drawable->bpp;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
val_p = g_new (gdouble, MAX (width, height));
val_m = g_new (gdouble, MAX (width, height));
dest = g_new0 (guchar, width * height);
progress = 0;
max_progress = width * height * 3;
/* Initialize the pixel regions. */
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &src_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
guchar *src_ptr = src_rgn.data;
guchar *dest_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1);
for (row = 0; row < src_rgn.h; row++)
{
for (col = 0; col < src_rgn.w; col++)
{
/* desaturate */
if (bytes > 2)
dest_ptr[col] = (guchar) gimp_rgb_to_l_int (src_ptr[col * bytes + 0],
src_ptr[col * bytes + 1],
src_ptr[col * bytes + 2]);
else
dest_ptr[col] = (guchar) src_ptr[col * bytes];
/* compute sigmoidal transfer */
val = dest_ptr[col] / 255.0;
val = 255.0 / (1 + exp (-(SIGMOIDAL_BASE + (svals.sharpness * SIGMOIDAL_RANGE)) * (val - 0.5)));
val = val * svals.brightness;
dest_ptr[col] = (guchar) CLAMP (val, 0, 255);
}
src_ptr += src_rgn.rowstride;
dest_ptr += width;
}
if (!preview)
{
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
/* Calculate the standard deviations */
radius = fabs (svals.glow_radius) + 1.0;
std_dev = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
/* derive the constants for calculating the gaussian from the std dev */
find_constants (n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);
/* First the vertical pass */
for (col = 0; col < width; col++)
{
memset (val_p, 0, height * sizeof (gdouble));
memset (val_m, 0, height * sizeof (gdouble));
src = dest + col;
sp_p = src;
sp_m = src + width * (height - 1);
vp = val_p;
vm = val_m + (height - 1);
/* Set up the first vals */
initial_p[0] = sp_p[0];
initial_m[0] = sp_m[0];
for (row = 0; row < height; row++)
{
gdouble *vpptr, *vmptr;
terms = (row < 4) ? row : 4;
vpptr = vp; vmptr = vm;
for (i = 0; i <= terms; i++)
{
*vpptr += n_p[i] * sp_p[-i * width] - d_p[i] * vp[-i];
*vmptr += n_m[i] * sp_m[i * width] - d_m[i] * vm[i];
}
for (j = i; j <= 4; j++)
{
*vpptr += (n_p[j] - bd_p[j]) * initial_p[0];
*vmptr += (n_m[j] - bd_m[j]) * initial_m[0];
}
sp_p += width;
sp_m -= width;
vp ++;
vm --;
}
transfer_pixels (val_p, val_m, dest + col, width, height);
if (!preview)
{
progress += height;
if ((col % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
for (row = 0; row < height; row++)
{
memset (val_p, 0, width * sizeof (gdouble));
memset (val_m, 0, width * sizeof (gdouble));
src = dest + row * width;
sp_p = src;
sp_m = src + width - 1;
vp = val_p;
vm = val_m + width - 1;
/* Set up the first vals */
initial_p[0] = sp_p[0];
initial_m[0] = sp_m[0];
for (col = 0; col < width; col++)
{
gdouble *vpptr, *vmptr;
terms = (col < 4) ? col : 4;
vpptr = vp; vmptr = vm;
for (i = 0; i <= terms; i++)
{
*vpptr += n_p[i] * sp_p[-i] - d_p[i] * vp[-i];
*vmptr += n_m[i] * sp_m[i] - d_m[i] * vm[i];
}
for (j = i; j <= 4; j++)
{
*vpptr += (n_p[j] - bd_p[j]) * initial_p[0];
*vmptr += (n_m[j] - bd_m[j]) * initial_m[0];
}
sp_p ++;
sp_m --;
vp ++;
vm --;
}
transfer_pixels (val_p, val_m, dest + row * width, 1, width);
if (!preview)
{
progress += width;
if ((row % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
/* Initialize the pixel regions. */
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
guchar *src_ptr = src_rgn.data;
guchar *dest_ptr = dest_rgn.data;
guchar *blur_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1);
for (row = 0; row < src_rgn.h; row++)
{
for (col = 0; col < src_rgn.w; col++)
{
/* screen op */
for (b = 0; b < (has_alpha ? (bytes - 1) : bytes); b++)
dest_ptr[col * bytes + b] =
255 - INT_MULT((255 - src_ptr[col * bytes + b]),
(255 - blur_ptr[col]), tmp);
if (has_alpha)
dest_ptr[col * bytes + b] = src_ptr[col * bytes + b];
}
src_ptr += src_rgn.rowstride;
dest_ptr += dest_rgn.rowstride;
blur_ptr += width;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
if (! preview)
{
/* merge the shadow, update the drawable */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, (x2 - x1), (y2 - y1));
}
/* free up buffers */
g_free (val_p);
g_free (val_m);
g_free (dest);
}
gboolean
focusblur_fft_buffer_update (FblurFftBuffer **fft,
FblurParam *param,
FblurQualityType quality,
GimpPreview *preview)
{
gint width, height;
gint radius, range;
gint x1, x2, y1, y2;
/* check condition */
if (quality == FBLUR_QUALITY_BEST)
return FALSE;
if (! focusblur_diffusion_update (&(param->diffusion), *fft,
&(param->store), param->brush_name))
{
gimp_message (_("Failed to update diffusion table."));
focusblur_fft_buffer_destroy (fft);
return FALSE;
}
radius = ceilf (param->diffusion->model_radius); // without softness
range = param->diffusion->model_radius_int;
if (radius < 3 ||
(quality == FBLUR_QUALITY_NORMAL &&
param->store.enable_depth_map &&
radius > 63)) // needs more tune
return FALSE;
gimp_drawable_mask_bounds (param->drawable_ID, &x1, &y1, &x2, &y2);
if (preview)
{
gint px1, px2, py1, py2;
gint pw, ph;
gimp_preview_get_position (GIMP_PREVIEW (preview), &px1, &py1);
gimp_preview_get_size (GIMP_PREVIEW (preview), &pw, &ph);
px2 = px1 + pw;
py2 = py1 + ph;
/* it is not need for GimpDrawablePreview */
if (x1 >= px2 || x2 <= px1 ||
y1 >= py2 || y2 <= py1)
return TRUE;
x1 = MAX (px1, x1);
x2 = MIN (px2, x2);
y1 = MAX (py1, y1);
y2 = MIN (py2, y2);
}
width = x2 - x1;
height = y2 - y1;
if (width < range ||
height < range)
return FALSE;
if (! *fft)
{
*fft = g_new0 (FblurFftBuffer, 1);
if (! *fft)
{
gimp_message (_("Failed to allocate memory."));
return FALSE;
}
}
//focusblur_source_destroy (&(param->source));
/* fftsource must be updated before to update work and depth */
if (! focusblur_fft_buffer_update_source (*fft, param->drawable, preview))
{
gimp_message (_("Failed to update source buffer."));
focusblur_fft_buffer_destroy (fft);
return FALSE;
}
if (param->store.enable_depth_map)
{
if (! focusblur_depth_map_update (&(param->depth_map), *fft,
&(param->store), quality))
{
gimp_message (_("Failed to update depth info."));
focusblur_fft_buffer_destroy (fft);
return FALSE;
}
else
{
gint d = focusblur_depth_map_focal_depth (param->depth_map);
focusblur_fft_buffer_update_depth_division (*fft, quality, range, d);
focusblur_fft_buffer_update_depth_count (*fft, param->depth_map);
}
}
if (! focusblur_fft_buffer_update_work (*fft, range))
{
gimp_message (_("Failed to update working buffer."));
focusblur_fft_buffer_destroy (fft);
return FALSE;
}
if (! focusblur_shine_update (&(param->shine), param->drawable,
&(param->store)))
{
gimp_message (_("Failed to update shine data."));
focusblur_fft_buffer_destroy (fft);
return FALSE;
}
return TRUE;
}
static void
grid (gint32 image_ID,
GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
gint bytes;
gint x_offset, y_offset;
guchar *dest, *buffer = NULL;
gint x, y;
gboolean alpha;
gboolean blend;
guchar hcolor[4];
guchar vcolor[4];
guchar icolor[4];
guchar *cmap;
gint ncolors;
gimp_rgba_get_uchar (&grid_cfg.hcolor,
hcolor, hcolor + 1, hcolor + 2, hcolor + 3);
gimp_rgba_get_uchar (&grid_cfg.vcolor,
vcolor, vcolor + 1, vcolor + 2, vcolor + 3);
gimp_rgba_get_uchar (&grid_cfg.icolor,
icolor, icolor + 1, icolor + 2, icolor + 3);
switch (gimp_image_base_type (image_ID))
{
case GIMP_RGB:
blend = TRUE;
break;
case GIMP_GRAY:
hcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.hcolor);
vcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.vcolor);
icolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.icolor);
blend = TRUE;
break;
case GIMP_INDEXED:
cmap = gimp_image_get_colormap (image_ID, &ncolors);
hcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.hcolor);
vcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.vcolor);
icolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.icolor);
g_free (cmap);
blend = FALSE;
break;
default:
g_assert_not_reached ();
blend = FALSE;
}
bytes = drawable->bpp;
alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (preview)
{
gimp_preview_get_position (preview, &sx1, &sy1);
gimp_preview_get_size (preview, &sx2, &sy2);
buffer = g_new (guchar, bytes * sx2 * sy2);
sx2 += sx1;
sy2 += sy1;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &sx1, &sy1, &sx2, &sy2);
gimp_pixel_rgn_init (&destPR,
drawable, 0, 0, sx2 - sx1, sy2 - sy1, TRUE, TRUE);
}
gimp_pixel_rgn_init (&srcPR,
drawable, 0, 0, sx2 - sx1, sy2 - sy1, FALSE, FALSE);
dest = g_new (guchar, (sx2 - sx1) * bytes);
for (y = sy1; y < sy2; y++)
{
gimp_pixel_rgn_get_row (&srcPR, dest, sx1, y, (sx2 - sx1));
y_offset = y - grid_cfg.hoffset;
while (y_offset < 0)
y_offset += grid_cfg.hspace;
if ((y_offset +
(grid_cfg.hwidth / 2)) % grid_cfg.hspace < grid_cfg.hwidth)
{
for (x = sx1; x < sx2; x++)
{
pix_composite (&dest[(x-sx1) * bytes],
hcolor, bytes, blend, alpha);
}
}
for (x = sx1; x < sx2; x++)
{
x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
while (x_offset < 0)
x_offset += grid_cfg.vspace;
if ((x_offset +
(grid_cfg.vwidth / 2)) % grid_cfg.vspace < grid_cfg.vwidth)
{
pix_composite (&dest[(x-sx1) * bytes],
vcolor, bytes, blend, alpha);
}
if ((x_offset +
(grid_cfg.iwidth / 2)) % grid_cfg.vspace < grid_cfg.iwidth
&&
((y_offset % grid_cfg.hspace >= grid_cfg.ispace
&&
y_offset % grid_cfg.hspace < grid_cfg.ioffset)
||
(grid_cfg.hspace -
(y_offset % grid_cfg.hspace) >= grid_cfg.ispace
&&
grid_cfg.hspace -
(y_offset % grid_cfg.hspace) < grid_cfg.ioffset)))
{
pix_composite (&dest[(x-sx1) * bytes],
icolor, bytes, blend, alpha);
}
}
if ((y_offset +
(grid_cfg.iwidth / 2)) % grid_cfg.hspace < grid_cfg.iwidth)
{
for (x = sx1; x < sx2; x++)
{
x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
while (x_offset < 0)
x_offset += grid_cfg.vspace;
if ((x_offset % grid_cfg.vspace >= grid_cfg.ispace
&&
x_offset % grid_cfg.vspace < grid_cfg.ioffset)
||
(grid_cfg.vspace -
(x_offset % grid_cfg.vspace) >= grid_cfg.ispace
&&
grid_cfg.vspace -
(x_offset % grid_cfg.vspace) < grid_cfg.ioffset))
{
pix_composite (&dest[(x-sx1) * bytes],
icolor, bytes, blend, alpha);
}
}
}
if (preview)
{
memcpy (buffer + (y - sy1) * (sx2 - sx1) * bytes,
dest,
(sx2 - sx1) * bytes);
}
else
{
gimp_pixel_rgn_set_row (&destPR, dest, sx1, y, (sx2 - sx1));
if (y % 16 == 0)
gimp_progress_update ((gdouble) y / (gdouble) (sy2 - sy1));
}
}
g_free (dest);
if (preview)
{
gimp_preview_draw_buffer (preview, buffer, bytes * (sx2 - sx1));
g_free (buffer);
}
else
{
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
sx1, sy1, sx2 - sx1, sy2 - sy1);
}
}
static void
drawlens (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpImageType drawtype = gimp_drawable_type (drawable->drawable_id);
GimpPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
gint row;
gint x1, y1, x2, y2;
guchar *src, *dest;
gint i, col;
gfloat regionwidth, regionheight, dx, dy, xsqr, ysqr;
gfloat a, b, c, asqr, bsqr, csqr, x, y;
glong pixelpos, pos;
GimpRGB background;
guchar bgr_red, bgr_blue, bgr_green;
guchar alphaval;
gimp_context_get_background (&background);
gimp_rgb_get_uchar (&background,
&bgr_red, &bgr_green, &bgr_blue);
bytes = drawable->bpp;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
src = gimp_drawable_get_thumbnail_data (drawable->drawable_id,
&width, &height, &bytes);
regionwidth = width;
regionheight = height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
regionwidth = x2 - x1;
regionheight = y2 - y1;
width = drawable->width;
height = drawable->height;
gimp_pixel_rgn_init (&srcPR, drawable,
0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable,
0, 0, width, height, TRUE, TRUE);
src = g_new (guchar, regionwidth * regionheight * bytes);
gimp_pixel_rgn_get_rect (&srcPR, src,
x1, y1, regionwidth, regionheight);
}
dest = g_new (guchar, regionwidth * regionheight * bytes);
a = regionwidth / 2;
b = regionheight / 2;
c = MIN (a, b);
asqr = a * a;
bsqr = b * b;
csqr = c * c;
for (col = 0; col < regionwidth; col++)
{
dx = (gfloat) col - a + 0.5;
xsqr = dx * dx;
for (row = 0; row < regionheight; row++)
{
pixelpos = (col + row * regionwidth) * bytes;
dy = -((gfloat) row - b) - 0.5;
ysqr = dy * dy;
if (ysqr < (bsqr - (bsqr * xsqr) / asqr))
{
find_projected_pos (asqr, bsqr, csqr, dx, dy, &x, &y);
y = -y;
pos = ((gint) (y + b) * regionwidth + (gint) (x + a)) * bytes;
for (i = 0; i < bytes; i++)
{
dest[pixelpos + i] = src[pos + i];
}
}
else
{
if (lvals.keep_surr)
{
for (i = 0; i < bytes; i++)
{
dest[pixelpos + i] = src[pixelpos + i];
}
}
else
{
if (lvals.set_transparent)
alphaval = 0;
else
alphaval = 255;
switch (drawtype)
{
case GIMP_INDEXEDA_IMAGE:
dest[pixelpos + 1] = alphaval;
case GIMP_INDEXED_IMAGE:
dest[pixelpos + 0] = 0;
break;
case GIMP_RGBA_IMAGE:
dest[pixelpos + 3] = alphaval;
case GIMP_RGB_IMAGE:
dest[pixelpos + 0] = bgr_red;
dest[pixelpos + 1] = bgr_green;
dest[pixelpos + 2] = bgr_blue;
break;
case GIMP_GRAYA_IMAGE:
dest[pixelpos + 1] = alphaval;
case GIMP_GRAY_IMAGE:
dest[pixelpos+0] = bgr_red;
break;
}
}
}
}
if (!preview)
{
if (((gint) (regionwidth-col) % 5) == 0)
gimp_progress_update ((gdouble) col / (gdouble) regionwidth);
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, dest, bytes * regionwidth);
}
else
{
gimp_progress_update (1.0);
gimp_pixel_rgn_set_rect (&destPR, dest, x1, y1,
regionwidth, regionheight);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, x2 - x1, y2 - y1);
}
g_free (src);
g_free (dest);
}
static void
edge_preview_update (GimpPreview *preview)
{
/* drawable */
GimpDrawable *drawable;
glong bytes;
gint alpha;
gboolean has_alpha;
/* preview */
guchar *src = NULL; /* Buffer to hold source image */
guchar *render_buffer = NULL; /* Buffer to hold rendered image */
guchar *dest;
gint width; /* Width of preview widget */
gint height; /* Height of preview widget */
gint x1; /* Upper-left X of preview */
gint y1; /* Upper-left Y of preview */
GimpPixelRgn srcPR; /* Pixel regions */
/* algorithm */
gint x, y;
/* Get drawable info */
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
bytes = gimp_drawable_bpp (drawable->drawable_id);
alpha = bytes;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (has_alpha)
alpha--;
/*
* Setup for filter...
*/
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
/* initialize pixel regions */
gimp_pixel_rgn_init (&srcPR, drawable,
x1, y1, width, height, FALSE, FALSE);
src = g_new (guchar, width * height * bytes);
render_buffer = g_new (guchar, width * height * bytes);
/* render image */
gimp_pixel_rgn_get_rect(&srcPR, src, x1, y1, width, height);
dest = render_buffer;
/* render algorithm */
for (y = 0 ; y < height ; y++)
for (x = 0 ; x < width ; x++)
{
gint chan;
for (chan = 0; chan < alpha; chan++)
{
guchar kernel[9];
#define SRC(X,Y) src[bytes * (CLAMP((X), 0, width-1) + \
width * CLAMP((Y), 0, height-1)) + chan]
kernel[0] = SRC (x - 1, y - 1);
kernel[1] = SRC (x - 1, y );
kernel[2] = SRC (x - 1, y + 1);
kernel[3] = SRC (x , y - 1);
kernel[4] = SRC (x , y );
kernel[5] = SRC (x , y + 1);
kernel[6] = SRC (x + 1, y - 1);
kernel[7] = SRC (x + 1, y );
kernel[8] = SRC (x + 1, y + 1);
#undef SRC
dest[chan] = edge_detect (kernel);
}
if (has_alpha)
dest[alpha] = src[bytes * (x + width * y) + alpha];
dest += bytes;
}
/*
* Draw the preview image on the screen...
*/
gimp_preview_draw_buffer (preview, render_buffer, width * bytes);
g_free (render_buffer);
g_free (src);
}
static void
shift (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn dest_rgn;
gpointer pr;
GimpPixelFetcher *pft;
gint width, height;
gint bytes;
guchar *destline;
guchar *dest;
gint x1, y1, x2, y2;
gint x, y;
gint progress, max_progress;
gint i, n = 0;
gint *offsets;
GRand *gr;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
bytes = drawable->bpp;
progress = 0;
max_progress = width * height;
/* Shift the image. It's a pretty simple algorithm. If horizontal
is selected, then every row is shifted a random number of pixels
in the range of -shift_amount/2 to shift_amount/2. The effect is
just reproduced with columns if vertical is selected.
*/
n = (shvals.orientation == HORIZONTAL) ? height : width;
offsets = g_new (gint, n);
gr = g_rand_new ();
for (i = 0; i < n; i++)
offsets[i] = g_rand_int_range (gr,
- (shvals.shift_amount + 1) / 2.0,
+ (shvals.shift_amount + 1) / 2.0);
g_rand_free (gr);
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_pixel_fetcher_set_edge_mode (pft, GIMP_PIXEL_FETCHER_EDGE_WRAP);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
destline = dest_rgn.data;
switch (shvals.orientation)
{
case HORIZONTAL:
for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
{
dest = destline;
for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
{
gimp_pixel_fetcher_get_pixel (pft,
x + offsets[y - y1], y, dest);
dest += bytes;
}
destline += dest_rgn.rowstride;
}
break;
case VERTICAL:
for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
{
dest = destline;
for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
{
gimp_pixel_fetcher_get_pixel (pft,
x, y + offsets[x - x1], dest);
dest += dest_rgn.rowstride;
}
destline += bytes;
}
break;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
}
gimp_pixel_fetcher_destroy (pft);
g_free (offsets);
if (! preview)
{
gimp_progress_update (1.0);
/* update the region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}
static void
preview_update (GimpPreview *preview)
{
GimpDrawable *drawable;
GimpPixelRgn src_rgn; /* Source image region */
guchar *src_ptr; /* Current source pixel */
guchar *dst_ptr; /* Current destination pixel */
intneg *neg_ptr; /* Current negative pixel */
gint i; /* Looping var */
gint y; /* Current location in image */
gint width; /* Byte width of the image */
gint x1, y1;
gint preview_width, preview_height;
guchar *preview_src, *preview_dst;
intneg *preview_neg;
gint img_bpp; /* Bytes-per-pixel in image */
void (*filter)(int, guchar *, guchar *, intneg *, intneg *, intneg *);
filter = NULL;
compute_luts();
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &preview_width, &preview_height);
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
preview_src = g_new (guchar, preview_width * preview_height * img_bpp);
preview_neg = g_new (intneg, preview_width * preview_height * img_bpp);
preview_dst = g_new (guchar, preview_width * preview_height * img_bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, preview_width, preview_height,
FALSE, FALSE);
width = preview_width * img_bpp;
/*
* Load the preview area...
*/
gimp_pixel_rgn_get_rect (&src_rgn, preview_src, x1, y1,
preview_width, preview_height);
for (i = width * preview_height, src_ptr = preview_src, neg_ptr = preview_neg;
i > 0;
i --)
*neg_ptr++ = neg_lut[*src_ptr++];
/*
* Select the filter...
*/
switch (img_bpp)
{
case 1:
filter = gray_filter;
break;
case 2:
filter = graya_filter;
break;
case 3:
filter = rgb_filter;
break;
case 4:
filter = rgba_filter;
break;
default:
g_error ("Programmer stupidity error: img_bpp is %d\n",
img_bpp);
}
/*
* Sharpen...
*/
memcpy (preview_dst, preview_src, width);
memcpy (preview_dst + width * (preview_height - 1),
preview_src + width * (preview_height - 1),
width);
for (y = preview_height - 2, src_ptr = preview_src + width,
neg_ptr = preview_neg + width + img_bpp,
dst_ptr = preview_dst + width;
y > 0;
y --, src_ptr += width, neg_ptr += width, dst_ptr += width)
(*filter)(preview_width, src_ptr, dst_ptr, neg_ptr - width,
neg_ptr, neg_ptr + width);
gimp_preview_draw_buffer (preview, preview_dst, preview_width * img_bpp);
g_free (preview_src);
g_free (preview_neg);
g_free (preview_dst);
}
static void
value_propagate_body (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpImageType dtype;
ModeParam operation;
GimpPixelRgn srcRgn, destRgn;
guchar *here, *best, *dest;
guchar *dest_row, *prev_row, *cur_row, *next_row;
guchar *pr, *cr, *nr, *swap;
gint width, height, bytes, index;
gint begx, begy, endx, endy, x, y, dx;
gint left_index, right_index, up_index, down_index;
gpointer tmp;
GimpRGB foreground;
/* calculate neighbors' indexes */
left_index = (vpvals.direction_mask & (1 << Left2Right)) ? -1 : 0;
right_index = (vpvals.direction_mask & (1 << Right2Left)) ? 1 : 0;
up_index = (vpvals.direction_mask & (1 << Top2Bottom)) ? -1 : 0;
down_index = (vpvals.direction_mask & (1 << Bottom2Top)) ? 1 : 0;
operation = modes[vpvals.propagate_mode];
tmp = NULL;
dtype = gimp_drawable_type (drawable->drawable_id);
bytes = drawable->bpp;
/* Here I use the algorithm of blur.c */
if (preview)
{
gimp_preview_get_position (preview, &begx, &begy);
gimp_preview_get_size (preview, &width, &height);
endx = begx + width;
endy = begy + height;
}
else
{
if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&begx, &begy, &width, &height))
return;
endx = begx + width;
endy = begy + height;
}
gimp_tile_cache_ntiles (2 * ((width) / gimp_tile_width () + 1));
prev_row = g_new (guchar, (width + 2) * bytes);
cur_row = g_new (guchar, (width + 2) * bytes);
next_row = g_new (guchar, (width + 2) * bytes);
dest_row = g_new (guchar, width * bytes);
gimp_pixel_rgn_init (&srcRgn, drawable,
begx, begy, width, height,
FALSE, FALSE);
gimp_pixel_rgn_init (&destRgn, drawable,
begx, begy, width, height,
(preview == NULL), TRUE);
pr = prev_row + bytes;
cr = cur_row + bytes;
nr = next_row + bytes;
prepare_row (&srcRgn, pr, begx, (0 < begy) ? begy : begy - 1, endx-begx);
prepare_row (&srcRgn, cr, begx, begy, endx-begx);
best = g_new (guchar, bytes);
if (!preview)
gimp_progress_init (_("Value Propagate"));
gimp_context_get_foreground (&foreground);
gimp_rgb_get_uchar (&foreground, fore+0, fore+1, fore+2);
/* start real job */
for (y = begy ; y < endy ; y++)
{
prepare_row (&srcRgn, nr, begx, ((y+1) < endy) ? y+1 : endy, endx-begx);
for (index = 0; index < (endx - begx) * bytes; index++)
dest_row[index] = cr[index];
for (x = 0 ; x < endx - begx; x++)
{
dest = dest_row + (x * bytes);
here = cr + (x * bytes);
/* *** copy source value to best value holder *** */
memcpy (best, here, bytes);
if (operation.initializer)
(* operation.initializer)(dtype, bytes, best, here, &tmp);
/* *** gather neighbors' values: loop-unfolded version *** */
if (up_index == -1)
for (dx = left_index ; dx <= right_index ; dx++)
(* operation.updater)(dtype, bytes, here, pr+((x+dx)*bytes), best, tmp);
for (dx = left_index ; dx <= right_index ; dx++)
if (dx != 0)
(* operation.updater)(dtype, bytes, here, cr+((x+dx)*bytes), best, tmp);
if (down_index == 1)
for (dx = left_index ; dx <= right_index ; dx++)
(* operation.updater)(dtype, bytes, here, nr+((x+dx)*bytes), best, tmp);
/* *** store it to dest_row*** */
(* operation.finalizer)(dtype, bytes, best, here, dest, tmp);
}
/* now store destline to destRgn */
gimp_pixel_rgn_set_row (&destRgn, dest_row, begx, y, endx - begx);
/* shift the row pointers */
swap = pr;
pr = cr;
cr = nr;
nr = swap;
if (((y % 16) == 0) && !preview)
gimp_progress_update ((gdouble) y / (gdouble) (endy - begy));
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&destRgn);
}
else
{
/* update the region */
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, begx, begy, endx-begx, endy-begy);
}
}
static void
randomize (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR, destPR2, *sp, *dp, *tp;
gint width, height;
gint bytes;
guchar *dest, *d;
guchar *prev_row, *pr;
guchar *cur_row, *cr;
guchar *next_row, *nr;
guchar *tmp;
gint row, col;
gint x, y;
gint cnt;
gint i, j, k;
if (preview)
{
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
}
else
{
if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&x, &y, &width, &height))
return;
}
bytes = drawable->bpp;
/*
* allocate row buffers
*/
prev_row = g_new (guchar, (width + 2) * bytes);
cur_row = g_new (guchar, (width + 2) * bytes);
next_row = g_new (guchar, (width + 2) * bytes);
dest = g_new (guchar, width * bytes);
/*
* initialize the pixel regions
*/
gimp_pixel_rgn_init (&srcPR, drawable, x, y, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, TRUE, TRUE);
gimp_pixel_rgn_init (&destPR2, drawable, x, y, width, height, TRUE, TRUE);
sp = &srcPR;
dp = &destPR;
tp = NULL;
pr = prev_row + bytes;
cr = cur_row + bytes;
nr = next_row + bytes;
for (cnt = 1; cnt <= pivals.rndm_rcount; cnt++)
{
/*
* prepare the first row and previous row
*/
randomize_prepare_row (sp, pr, x, y - 1, width);
randomize_prepare_row (sp, cr, x, y, width);
/*
* loop through the rows, applying the selected convolution
*/
for (row = y; row < y + height; row++)
{
/* prepare the next row */
randomize_prepare_row (sp, nr, x, row + 1, width);
d = dest;
for (col = 0; col < width; col++)
{
if (g_rand_int_range (gr, 0, 100) <= (gint) pivals.rndm_pct)
{
switch (rndm_type)
{
/*
* HURL
* Just assign a random value.
*/
case RNDM_HURL:
for (j = 0; j < bytes; j++)
*d++ = g_rand_int_range (gr, 0, 256);
break;
/*
* PICK
* pick at random from a neighboring pixel.
*/
case RNDM_PICK:
k = g_rand_int_range (gr, 0, 9);
for (j = 0; j < bytes; j++)
{
i = col * bytes + j;
switch (k)
{
case 0:
*d++ = (gint) pr[i - bytes];
break;
case 1:
*d++ = (gint) pr[i];
break;
case 2:
*d++ = (gint) pr[i + bytes];
break;
case 3:
*d++ = (gint) cr[i - bytes];
break;
case 4:
*d++ = (gint) cr[i];
break;
case 5:
*d++ = (gint) cr[i + bytes];
break;
case 6:
*d++ = (gint) nr[i - bytes];
break;
case 7:
*d++ = (gint) nr[i];
break;
case 8:
*d++ = (gint) nr[i + bytes];
break;
}
}
break;
/*
* SLUR
* 80% chance it's from directly above,
* 10% from above left,
* 10% from above right.
*/
case RNDM_SLUR:
k = g_rand_int_range (gr, 0, 10);
for (j = 0; j < bytes; j++)
{
i = col*bytes + j;
switch (k )
{
case 0:
*d++ = (gint) pr[i - bytes];
break;
case 9:
*d++ = (gint) pr[i + bytes];
break;
default:
*d++ = (gint) pr[i];
break;
}
}
break;
}
/*
* Otherwise, this pixel was not selected for randomization,
* so use the current value.
*/
}
else
{
for (j = 0; j < bytes; j++)
*d++ = (gint) cr[col*bytes + j];
}
}
/*
* Save the modified row, shuffle the row pointers, and every
* so often, update the progress meter.
*/
gimp_pixel_rgn_set_row (dp, dest, x, row, width);
tmp = pr;
pr = cr;
cr = nr;
nr = tmp;
if (! preview && PROG_UPDATE_TIME)
{
gdouble base = (gdouble) cnt / pivals.rndm_rcount;
gdouble inc = (gdouble) row / (height * pivals.rndm_rcount);
gimp_progress_update (base + inc);
}
}
/*
* if we have more cycles to perform, swap the src and dest Pixel Regions
*/
if (cnt < pivals.rndm_rcount)
{
if (tp != NULL)
{
tp = dp;
dp = sp;
sp = tp;
}
else
{
tp = &srcPR;
sp = &destPR;
dp = &destPR2;
}
}
}
if (! preview)
gimp_progress_update (1.0);
/*
* update the randomized region
*/
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
dp);
}
else
{
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x, y, width, height);
}
/*
* clean up after ourselves.
*/
g_free (prev_row);
g_free (cur_row);
g_free (next_row);
g_free (dest);
}
/* - Filter function - I wish all filter functions had a pmode :) */
static void
glasstile (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *dest, *d;
guchar *cur_row;
gint row, col, i;
gint x1, y1, x2, y2;
/* Translations of variable names from Maswan
* rutbredd = grid width
* ruthojd = grid height
* ymitt = y middle
* xmitt = x middle
*/
gint rutbredd, xpixel1, xpixel2;
gint ruthojd , ypixel2;
gint xhalv, xoffs, xmitt, xplus;
gint yhalv, yoffs, ymitt, yplus;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
bytes = drawable->bpp;
cur_row = g_new (guchar, width * bytes);
dest = g_new (guchar, width * bytes);
/* initialize the pixel regions, set grid height/width */
gimp_pixel_rgn_init (&srcPR, drawable,
x1, y1, width, height,
FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable,
x1, y1, width, height,
preview == NULL, TRUE);
rutbredd = gtvals.xblock;
ruthojd = gtvals.yblock;
xhalv = rutbredd / 2;
yhalv = ruthojd / 2;
xplus = rutbredd % 2;
yplus = ruthojd % 2;
ymitt = y1;
yoffs = 0;
/* Loop through the rows */
for (row = y1; row < y2; row++)
{
d = dest;
ypixel2 = ymitt + yoffs * 2;
ypixel2 = CLAMP (ypixel2, 0, y2 - 1);
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, ypixel2, width);
yoffs++;
/* if current offset = half, do a displacement next time around */
if (yoffs == yhalv)
{
ymitt += ruthojd;
yoffs = - (yhalv + yplus);
}
xmitt = 0;
xoffs = 0;
for (col = 0; col < x2 - x1; col++) /* one pixel */
{
xpixel1 = (xmitt + xoffs) * bytes;
xpixel2 = (xmitt + xoffs * 2) * bytes;
if (xpixel2 < (x2 - x1) * bytes)
{
if (xpixel2 < 0)
xpixel2 = 0;
for (i = 0; i < bytes; i++)
d[xpixel1 + i] = cur_row[xpixel2 + i];
}
else
{
for (i = 0; i < bytes; i++)
d[xpixel1 + i] = cur_row[xpixel1 + i];
}
xoffs++;
if (xoffs == xhalv)
{
xmitt += rutbredd;
xoffs = - (xhalv + xplus);
}
}
/* Store the dest */
gimp_pixel_rgn_set_row (&destPR, dest, x1, row, width);
if (!preview && ((row % 5) == 0))
{
gimp_progress_update ((gdouble) row / (gdouble) height);
}
}
/* Update region */
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&destPR);
}
else
{
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, width, height);
}
g_free (cur_row);
g_free (dest);
}
static void
neon (GimpDrawable *drawable,
gdouble radius,
gdouble amount,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
gint width, height;
gint bytes, bpp;
gboolean has_alpha;
guchar *dest;
guchar *src, *src2, *sp_p, *sp_m;
gdouble n_p[5], n_m[5];
gdouble d_p[5], d_m[5];
gdouble bd_p[5], bd_m[5];
gdouble *val_p, *val_m, *vp, *vm;
gint x1, y1, x2, y2;
gint i, j;
gint row, col, b;
gint terms;
gint progress = 0, max_progress = 1;
gint initial_p[4];
gint initial_m[4];
gdouble std_dev;
guchar *preview_buffer1 = NULL;
guchar *preview_buffer2 = NULL;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = (x2 - x1);
height = (y2 - y1);
}
if (radius < 1.0)
return;
bytes = drawable->bpp;
bpp = bytes;
has_alpha = gimp_drawable_has_alpha(drawable->drawable_id);
if (has_alpha)
bpp--;
val_p = g_new (gdouble, MAX (width, height) * bytes);
val_m = g_new (gdouble, MAX (width, height) * bytes);
src = g_new (guchar, MAX (width, height) * bytes);
src2 = g_new (guchar, MAX (width, height) * bytes);
dest = g_new (guchar, MAX (width, height) * bytes);
gimp_pixel_rgn_init (&src_rgn, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
if (preview)
{
preview_buffer1 = g_new (guchar, width * height * bytes);
preview_buffer2 = g_new (guchar, width * height * bytes);
}
else
{
gimp_pixel_rgn_init (&dest_rgn, drawable,
0, 0, drawable->width, drawable->height, TRUE, TRUE);
progress = 0;
max_progress = (radius < 1.0 ) ? 0 : width * height * radius * 2;
}
/* First the vertical pass */
radius = fabs (radius) + 1.0;
std_dev = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
/* derive the constants for calculating the gaussian from the std dev */
find_constants (n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);
for (col = 0; col < width; col++)
{
memset (val_p, 0, height * bytes * sizeof (gdouble));
memset (val_m, 0, height * bytes * sizeof (gdouble));
gimp_pixel_rgn_get_col (&src_rgn, src, col + x1, y1, (y2 - y1));
sp_p = src;
sp_m = src + (height - 1) * bytes;
vp = val_p;
vm = val_m + (height - 1) * bytes;
/* Set up the first vals */
for (i = 0; i < bytes; i++)
{
initial_p[i] = sp_p[i];
initial_m[i] = sp_m[i];
}
for (row = 0; row < height; row++)
{
gdouble *vpptr, *vmptr;
terms = (row < 4) ? row : 4;
for (b = 0; b < bpp; b++)
{
vpptr = vp + b;
vmptr = vm + b;
for (i = 0; i <= terms; i++)
{
*vpptr += n_p[i] * sp_p[(-i * bytes) + b] -
d_p[i] * vp[(-i * bytes) + b];
*vmptr += n_m[i] * sp_m[(i * bytes) + b] -
d_m[i] * vm[(i * bytes) + b];
}
for (j = i; j <= 4; j++)
{
*vpptr += (n_p[j] - bd_p[j]) * initial_p[b];
*vmptr += (n_m[j] - bd_m[j]) * initial_m[b];
}
}
if (has_alpha)
{
vp[bpp] = sp_p[bpp];
vm[bpp] = sp_m[bpp];
}
sp_p += bytes;
sp_m -= bytes;
vp += bytes;
vm -= bytes;
}
transfer_pixels (val_p, val_m, dest, bytes, height);
if (preview)
{
for (row = 0 ; row < height ; row++)
memcpy (preview_buffer1 + (row * width + col) * bytes,
dest + bytes * row,
bytes);
}
else
{
gimp_pixel_rgn_set_col (&dest_rgn, dest, col + x1, y1, (y2 - y1));
progress += height * radius;
if ((col % 20) == 0)
gimp_progress_update ((double) progress / (double) max_progress);
}
}
/* Now the horizontal pass */
gimp_pixel_rgn_init (&src_rgn, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
for (row = 0; row < height; row++)
{
memset (val_p, 0, width * bytes * sizeof (gdouble));
memset (val_m, 0, width * bytes * sizeof (gdouble));
gimp_pixel_rgn_get_row (&src_rgn, src, x1, row + y1, (x2 - x1));
if (preview)
{
memcpy (src2,
preview_buffer1 + row * width * bytes,
width * bytes);
}
else
{
gimp_pixel_rgn_get_row (&dest_rgn, src2, x1, row + y1, (x2 - x1));
}
sp_p = src;
sp_m = src + (width - 1) * bytes;
vp = val_p;
vm = val_m + (width - 1) * bytes;
/* Set up the first vals */
for (i = 0; i < bytes; i++)
{
initial_p[i] = sp_p[i];
initial_m[i] = sp_m[i];
}
for (col = 0; col < width; col++)
{
gdouble *vpptr, *vmptr;
terms = (col < 4) ? col : 4;
for (b = 0; b < bpp; b++)
{
vpptr = vp + b;
vmptr = vm + b;
for (i = 0; i <= terms; i++)
{
*vpptr += n_p[i] * sp_p[(-i * bytes) + b] -
d_p[i] * vp[(-i * bytes) + b];
*vmptr += n_m[i] * sp_m[(i * bytes) + b] -
d_m[i] * vm[(i * bytes) + b];
}
for (j = i; j <= 4; j++)
{
*vpptr += (n_p[j] - bd_p[j]) * initial_p[b];
*vmptr += (n_m[j] - bd_m[j]) * initial_m[b];
}
}
if (has_alpha)
{
vp[bpp] = sp_p[bpp];
vm[bpp] = sp_m[bpp];
}
sp_p += bytes;
sp_m -= bytes;
vp += bytes;
vm -= bytes;
}
transfer_pixels (val_p, val_m, dest, bytes, width);
combine_to_gradient (dest, src2, bytes, width, amount);
if (preview)
{
memcpy (preview_buffer2 + row * width * bytes,
dest,
width * bytes);
}
else
{
gimp_pixel_rgn_set_row (&dest_rgn, dest, x1, row + y1, (x2 - x1));
progress += width * radius;
if ((row % 20) == 0)
gimp_progress_update ((double) progress / (double) max_progress);
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, preview_buffer2, width * bytes);
g_free (preview_buffer1);
g_free (preview_buffer2);
}
else
{
gimp_progress_update (1.0);
/* now, merge horizontal and vertical into a magnitude */
gimp_pixel_rgn_init (&src_rgn, drawable,
0, 0, drawable->width, drawable->height,
FALSE, TRUE);
/* merge the shadow, update the drawable */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, (x2 - x1), (y2 - y1));
}
/* free up buffers */
g_free (val_p);
g_free (val_m);
g_free (src);
g_free (src2);
g_free (dest);
}
/*
* Cartoon algorithm
* -----------------
* Mask radius = radius of pixel neighborhood for intensity comparison
* Threshold = relative intensity difference which will result in darkening
* Ramp = amount of relative intensity difference before total black
* Blur radius = mask radius / 3.0
*
* Algorithm:
* For each pixel, calculate pixel intensity value to be: avg (blur radius)
* relative diff = pixel intensity / avg (mask radius)
* If relative diff < Threshold
* intensity mult = (Ramp - MIN (Ramp, (Threshold - relative diff))) / Ramp
* pixel intensity *= intensity mult
*/
static void
cartoon (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
GimpPixelRgn *pr;
gint width, height;
gint bytes;
gboolean has_alpha;
guchar *dest1;
guchar *dest2;
guchar *src;
guchar *src1, *sp_p1, *sp_m1;
guchar *src2, *sp_p2, *sp_m2;
gdouble n_p1[5], n_m1[5];
gdouble n_p2[5], n_m2[5];
gdouble d_p1[5], d_m1[5];
gdouble d_p2[5], d_m2[5];
gdouble bd_p1[5], bd_m1[5];
gdouble bd_p2[5], bd_m2[5];
gdouble *val_p1, *val_m1, *vp1, *vm1;
gdouble *val_p2, *val_m2, *vp2, *vm2;
gint x1, y1, x2, y2;
gint i, j;
gint row, col, b;
gint terms;
gint progress, max_progress;
gint initial_p1[4];
gint initial_p2[4];
gint initial_m1[4];
gint initial_m2[4];
gdouble radius;
gdouble std_dev1;
gdouble std_dev2;
gdouble ramp;
guchar *preview_buffer = NULL;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = (x2 - x1);
height = (y2 - y1);
}
bytes = drawable->bpp;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
val_p1 = g_new (gdouble, MAX (width, height) * bytes);
val_p2 = g_new (gdouble, MAX (width, height) * bytes);
val_m1 = g_new (gdouble, MAX (width, height) * bytes);
val_m2 = g_new (gdouble, MAX (width, height) * bytes);
src = g_new (guchar, MAX (width, height) * bytes);
dest1 = g_new0 (guchar, width * height);
dest2 = g_new0 (guchar, width * height);
gimp_pixel_rgn_init (&src_rgn, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
progress = 0;
max_progress = width * height * 2;
/* Calculate the standard deviations */
radius = 1.0; /* blur radius */
radius = fabs (radius) + 1.0;
std_dev1 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
radius = cvals.mask_radius;
radius = fabs (radius) + 1.0;
std_dev2 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));
/* derive the constants for calculating the gaussian from the std dev */
find_constants (n_p1, n_m1, d_p1, d_m1, bd_p1, bd_m1, std_dev1);
find_constants (n_p2, n_m2, d_p2, d_m2, bd_p2, bd_m2, std_dev2);
/* First the vertical pass */
for (col = 0; col < width; col++)
{
memset (val_p1, 0, height * bytes * sizeof (gdouble));
memset (val_p2, 0, height * bytes * sizeof (gdouble));
memset (val_m1, 0, height * bytes * sizeof (gdouble));
memset (val_m2, 0, height * bytes * sizeof (gdouble));
gimp_pixel_rgn_get_col (&src_rgn, src, col + x1, y1, height);
src1 = src;
sp_p1 = src1;
sp_m1 = src1 + (height - 1) * bytes;
vp1 = val_p1;
vp2 = val_p2;
vm1 = val_m1 + (height - 1) * bytes;
vm2 = val_m2 + (height - 1) * bytes;
/* Set up the first vals */
for (i = 0; i < bytes; i++)
{
initial_p1[i] = sp_p1[i];
initial_m1[i] = sp_m1[i];
}
for (row = 0; row < height; row++)
{
gdouble *vpptr1, *vmptr1;
gdouble *vpptr2, *vmptr2;
terms = (row < 4) ? row : 4;
for (b = 0; b < bytes; b++)
{
vpptr1 = vp1 + b; vmptr1 = vm1 + b;
vpptr2 = vp2 + b; vmptr2 = vm2 + b;
for (i = 0; i <= terms; i++)
{
*vpptr1 += n_p1[i] * sp_p1[(-i * bytes) + b] -
d_p1[i] * vp1[(-i * bytes) + b];
*vmptr1 += n_m1[i] * sp_m1[(i * bytes) + b] -
d_m1[i] * vm1[(i * bytes) + b];
*vpptr2 += n_p2[i] * sp_p1[(-i * bytes) + b] -
d_p2[i] * vp2[(-i * bytes) + b];
*vmptr2 += n_m2[i] * sp_m1[(i * bytes) + b] -
d_m2[i] * vm2[(i * bytes) + b];
}
for (j = i; j <= 4; j++)
{
*vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[b];
*vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[b];
*vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p1[b];
*vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m1[b];
}
}
sp_p1 += bytes;
sp_m1 -= bytes;
vp1 += bytes;
vp2 += bytes;
vm1 -= bytes;
vm2 -= bytes;
}
transfer_pixels (val_p1, val_m1, dest1 + col, width, bytes, height);
transfer_pixels (val_p2, val_m2, dest2 + col, width, bytes, height);
if (!preview)
{
progress += height;
if ((col % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
for (row = 0; row < height; row++)
{
memset (val_p1, 0, width * sizeof (gdouble));
memset (val_p2, 0, width * sizeof (gdouble));
memset (val_m1, 0, width * sizeof (gdouble));
memset (val_m2, 0, width * sizeof (gdouble));
src1 = dest1 + row * width;
src2 = dest2 + row * width;
sp_p1 = src1;
sp_p2 = src2;
sp_m1 = src1 + width - 1;
sp_m2 = src2 + width - 1;
vp1 = val_p1;
vp2 = val_p2;
vm1 = val_m1 + width - 1;
vm2 = val_m2 + width - 1;
/* Set up the first vals */
initial_p1[0] = sp_p1[0];
initial_p2[0] = sp_p2[0];
initial_m1[0] = sp_m1[0];
initial_m2[0] = sp_m2[0];
for (col = 0; col < width; col++)
{
gdouble *vpptr1, *vmptr1;
gdouble *vpptr2, *vmptr2;
terms = (col < 4) ? col : 4;
vpptr1 = vp1; vmptr1 = vm1;
vpptr2 = vp2; vmptr2 = vm2;
for (i = 0; i <= terms; i++)
{
*vpptr1 += n_p1[i] * sp_p1[-i] - d_p1[i] * vp1[-i];
*vmptr1 += n_m1[i] * sp_m1[i] - d_m1[i] * vm1[i];
*vpptr2 += n_p2[i] * sp_p2[-i] - d_p2[i] * vp2[-i];
*vmptr2 += n_m2[i] * sp_m2[i] - d_m2[i] * vm2[i];
}
for (j = i; j <= 4; j++)
{
*vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
*vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];
*vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p2[0];
*vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m2[0];
}
sp_p1 ++;
sp_p2 ++;
sp_m1 --;
sp_m2 --;
vp1 ++;
vp2 ++;
vm1 --;
vm2 --;
}
transfer_pixels (val_p1, val_m1, dest1 + row * width, 1, 1, width);
transfer_pixels (val_p2, val_m2, dest2 + row * width, 1, 1, width);
if (!preview)
{
progress += width;
if ((row % 5) == 0)
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
}
/* Compute the ramp value which sets 'pct_black' % of the darkened pixels black */
ramp = compute_ramp (dest1, dest2, width * height, cvals.pct_black);
/* Initialize the pixel regions. */
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
if (preview)
{
pr = gimp_pixel_rgns_register (1, &src_rgn);
preview_buffer = g_new (guchar, width * height * bytes);
}
else
{
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, TRUE, TRUE);
pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
}
while (pr)
{
guchar *src_ptr = src_rgn.data;
guchar *dest_ptr;
guchar *blur_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
guchar *avg_ptr = dest2 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
gdouble diff;
gdouble mult = 0.0;
gdouble lightness;
if (preview)
dest_ptr =
preview_buffer +
((src_rgn.y - y1) * width + (src_rgn.x - x1)) * bytes;
else
dest_ptr = dest_rgn.data;
for (row = 0; row < src_rgn.h; row++)
{
for (col = 0; col < src_rgn.w; col++)
{
if (avg_ptr[col] != 0)
{
diff = (gdouble) blur_ptr[col] / (gdouble) avg_ptr[col];
if (diff < cvals.threshold)
{
if (ramp == 0.0)
mult = 0.0;
else
mult = (ramp - MIN (ramp, (cvals.threshold - diff))) / ramp;
}
else
mult = 1.0;
}
lightness = CLAMP (blur_ptr[col] * mult, 0, 255);
if (bytes < 3)
{
dest_ptr[col * bytes] = (guchar) lightness;
if (has_alpha)
dest_ptr[col * bytes + 1] = src_ptr[col * src_rgn.bpp + 1];
}
else
{
/* Convert to HLS, set lightness and convert back */
gint r, g, b;
r = src_ptr[col * src_rgn.bpp + 0];
g = src_ptr[col * src_rgn.bpp + 1];
b = src_ptr[col * src_rgn.bpp + 2];
gimp_rgb_to_hsl_int (&r, &g, &b);
b = lightness;
gimp_hsl_to_rgb_int (&r, &g, &b);
dest_ptr[col * bytes + 0] = r;
dest_ptr[col * bytes + 1] = g;
dest_ptr[col * bytes + 2] = b;
if (has_alpha)
dest_ptr[col * bytes + 3] = src_ptr[col * src_rgn.bpp + 3];
}
}
src_ptr += src_rgn.rowstride;
if (preview)
dest_ptr += width * bytes;
else
dest_ptr += dest_rgn.rowstride;
blur_ptr += width;
avg_ptr += width;
}
if (!preview)
{
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
pr = gimp_pixel_rgns_process (pr);
}
if (preview)
{
gimp_preview_draw_buffer (preview, preview_buffer, width * bytes);
g_free (preview_buffer);
}
else
{
/* merge the shadow, update the drawable */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
/* free up buffers */
g_free (val_p1);
g_free (val_p2);
g_free (val_m1);
g_free (val_m2);
g_free (src);
g_free (dest1);
g_free (dest2);
}
static void
ripple (GimpDrawable *drawable,
GimpPreview *preview)
{
RippleParam_t param;
gint edges;
gint period;
param.pft = gimp_pixel_fetcher_new (drawable, FALSE);
param.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
param.width = drawable->width;
param.height = drawable->height;
edges = rvals.edges;
period = rvals.period;
if (rvals.tile)
{
rvals.edges = WRAP;
rvals.period = (param.width / (param.width / rvals.period) *
(rvals.orientation == GIMP_ORIENTATION_HORIZONTAL) +
param.height / (param.height / rvals.period) *
(rvals.orientation == GIMP_ORIENTATION_VERTICAL));
}
if (preview)
{
guchar *buffer, *d;
gint bpp = gimp_drawable_bpp (drawable->drawable_id);
gint width, height;
gint x, y;
gint x1, y1;
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
d = buffer = g_new (guchar, width * height * bpp);
for (y = 0; y < height ; y++)
for (x = 0; x < width ; x++)
{
if (rvals.orientation == GIMP_ORIENTATION_VERTICAL)
ripple_vertical (x1 + x, y1 + y, d, bpp, ¶m);
else
ripple_horizontal (x1 + x, y1 + y, d, bpp, ¶m);
d += bpp;
}
gimp_preview_draw_buffer (preview, buffer, width * bpp);
g_free (buffer);
}
else
{
GimpRgnIterator *iter;
iter = gimp_rgn_iterator_new (drawable, 0);
gimp_rgn_iterator_dest (iter,
rvals.orientation == GIMP_ORIENTATION_VERTICAL ?
ripple_vertical :
ripple_horizontal,
¶m);
gimp_rgn_iterator_free (iter);
}
rvals.edges = edges;
rvals.period = period;
gimp_pixel_fetcher_destroy (param.pft);
}
/*
This function operates on the image when pixelwidth >= tile_width.
It simply sets the size of GimpPixelRgn as pixelwidth and proceeds.
*/
static void
pixelize_large (GimpDrawable *drawable,
gint pixelwidth,
gint pixelheight,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
guchar *src_row, *dest_row;
guchar *src, *dest = NULL, *d;
gulong average[4];
gint row, col, b, bpp, has_alpha;
gint x, y, x_step, y_step;
gint i, j;
gulong count;
gint x1, y1, x2, y2;
gint width, height;
gint progress = 0, max_progress = 1;
gpointer pr;
bpp = gimp_drawable_bpp (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
dest = g_new (guchar, width * height * bpp);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
/* Initialize progress */
progress = 0;
max_progress = 2 * width * height;
}
for (y = y1; y < y2; y += pixelheight - (y % pixelheight))
{
for (x = x1; x < x2; x += pixelwidth - (x % pixelwidth))
{
x_step = pixelwidth - (x % pixelwidth);
y_step = pixelheight - (y % pixelheight);
x_step = MIN (x_step, x2 - x);
y_step = MIN (y_step, y2 - y);
gimp_pixel_rgn_init (&src_rgn, drawable,
x, y, x_step, y_step, FALSE, FALSE);
for (b = 0; b < bpp; b++)
average[b] = 0;
count = 0;
for (pr = gimp_pixel_rgns_register (1, &src_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
src_row = src_rgn.data;
for (row = 0; row < src_rgn.h; row++)
{
src = src_row;
if (has_alpha)
{
for (col = 0; col < src_rgn.w; col++)
{
gulong alpha = src[bpp - 1];
average[bpp - 1] += alpha;
for (b = 0; b < bpp - 1; b++)
average[b] += src[b] * alpha;
src += src_rgn.bpp;
}
}
else
{
for (col = 0; col < src_rgn.w; col++)
{
for (b = 0; b < bpp; b++)
average[b] += src[b];
src += src_rgn.bpp;
}
}
src_row += src_rgn.rowstride;
}
count += src_rgn.w * src_rgn.h;
if (!preview)
{
/* Update progress */
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
}
if (count > 0)
{
if (has_alpha)
{
gulong alpha = average[bpp - 1];
if ((average[bpp - 1] = alpha / count))
for (b = 0; b < bpp - 1; b++)
average[b] /= alpha;
}
else
{
for (b = 0; b < bpp; b++)
average[b] /= count;
}
}
if (preview)
{
dest_row = dest + ((y - y1) * width + (x - x1)) * bpp;
for (j = 0; j < y_step; j++)
{
d = dest_row;
for (i = 0; i < x_step; i++)
for (b = 0; b < bpp; b++)
*d++ = average[b];
dest_row += width * bpp;
}
}
else
{
gimp_pixel_rgn_init (&dest_rgn, drawable,
x, y, x_step, y_step,
TRUE, TRUE);
for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
dest_row = dest_rgn.data;
for (row = 0; row < dest_rgn.h; row++)
{
dest = dest_row;
for (col = 0; col < dest_rgn.w; col++)
{
for (b = 0; b < bpp; b++)
dest[b] = average[b];
dest += dest_rgn.bpp;
}
dest_row += dest_rgn.rowstride;
}
/* Update progress */
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
}
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, dest, width * bpp);
g_free (dest);
}
else
{
/* update the blurred region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}
static void
displace (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpDrawable *map_x = NULL;
GimpDrawable *map_y = NULL;
GimpPixelRgn dest_rgn;
GimpPixelRgn map_x_rgn;
GimpPixelRgn map_y_rgn;
gpointer pr;
GimpPixelFetcher *pft;
gint width;
gint height;
gint bytes;
guchar *destrow, *dest;
guchar *mxrow, *mx;
guchar *myrow, *my;
guchar pixel[4][4];
gint x1, y1, x2, y2;
gint x, y;
gdouble cx, cy;
gint progress, max_progress;
gdouble amnt;
gdouble needx, needy;
gdouble radius, d_alpha;
gint xi, yi;
guchar values[4];
guchar val;
gint k;
gdouble xm_val, ym_val;
gint xm_alpha = 0;
gint ym_alpha = 0;
gint xm_bytes = 1;
gint ym_bytes = 1;
guchar *buffer = NULL;
gdouble pi;
/* initialize */
/* get rid of uninitialized warnings */
cx = cy = needx = needy = radius = d_alpha = 0.0;
pi = 4 * atan (1);
mxrow = NULL;
myrow = NULL;
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_pixel_fetcher_set_edge_mode (pft, dvals.displace_type);
bytes = drawable->bpp;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
if (dvals.mode == POLAR_MODE)
{
cx = x1 + width / 2.0;
cy = y1 + height / 2.0;
}
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
buffer = g_new (guchar, width * height * bytes);
}
progress = 0;
max_progress = width * height;
/*
* The algorithm used here is simple - see
* http://the-tech.mit.edu/KPT/Tips/KPT7/KPT7.html for a description.
*/
/* Get the drawables */
if (dvals.displace_map_x != -1 && dvals.do_x)
{
map_x = gimp_drawable_get (dvals.displace_map_x);
gimp_pixel_rgn_init (&map_x_rgn, map_x,
x1, y1, width, height, FALSE, FALSE);
if (gimp_drawable_has_alpha (map_x->drawable_id))
xm_alpha = 1;
xm_bytes = gimp_drawable_bpp (map_x->drawable_id);
}
if (dvals.displace_map_y != -1 && dvals.do_y)
{
map_y = gimp_drawable_get (dvals.displace_map_y);
gimp_pixel_rgn_init (&map_y_rgn, map_y,
x1, y1, width, height, FALSE, FALSE);
if (gimp_drawable_has_alpha (map_y->drawable_id))
ym_alpha = 1;
ym_bytes = gimp_drawable_bpp (map_y->drawable_id);
}
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height,
preview == NULL, preview == NULL);
/* Register the pixel regions */
if (dvals.do_x && dvals.do_y)
pr = gimp_pixel_rgns_register (3, &dest_rgn, &map_x_rgn, &map_y_rgn);
else if (dvals.do_x)
pr = gimp_pixel_rgns_register (2, &dest_rgn, &map_x_rgn);
else if (dvals.do_y)
pr = gimp_pixel_rgns_register (2, &dest_rgn, &map_y_rgn);
else
pr = NULL;
for (pr = pr; pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
destrow = dest_rgn.data;
if (dvals.do_x)
mxrow = map_x_rgn.data;
if (dvals.do_y)
myrow = map_y_rgn.data;
for (y = dest_rgn.y; y < (dest_rgn.y + dest_rgn.h); y++)
{
if (preview)
dest = buffer + ((y - y1) * width + (dest_rgn.x - x1)) * bytes;
else
dest = destrow;
mx = mxrow;
my = myrow;
/*
* We could move the displacement image address calculation
* out of here, but when we can have different sized
* displacement and destination images we'd have to move it
* back anyway.
*/
for (x = dest_rgn.x; x < (dest_rgn.x + dest_rgn.w); x++)
{
if (dvals.do_x)
{
xm_val = displace_map_give_value(mx, xm_alpha, xm_bytes);
amnt = dvals.amount_x * (xm_val - 127.5) / 127.5;
/* CARTESIAN_MODE == 0 - performance important here */
if (! dvals.mode)
{
needx = x + amnt;
}
else
{
radius = sqrt (SQR (x - cx) + SQR (y - cy)) + amnt;
}
mx += xm_bytes;
}
else
{
if (! dvals.mode)
needx = x;
else
radius = sqrt ((x - cx) * (x - cx) + (y - cy) * (y - cy));
}
if (dvals.do_y)
{
ym_val = displace_map_give_value(my, ym_alpha, ym_bytes);
amnt = dvals.amount_y * (ym_val - 127.5) / 127.5;
if (! dvals.mode)
{
needy = y + amnt;
}
else
{
d_alpha = atan2 (x - cx, y - cy) + (dvals.amount_y / 180)
* pi * (ym_val - 127.5) / 127.5;
}
my += ym_bytes;
}
else
{
if (! dvals.mode)
needy = y;
else
d_alpha = atan2 (x - cx, y - cy);
}
if (dvals.mode)
{
needx = cx + radius * sin (d_alpha);
needy = cy + radius * cos (d_alpha);
}
/* Calculations complete; now copy the proper pixel */
if (needx >= 0.0)
xi = (int) needx;
else
xi = -((int) -needx + 1);
if (needy >= 0.0)
yi = (int) needy;
else
yi = -((int) -needy + 1);
gimp_pixel_fetcher_get_pixel (pft, xi, yi, pixel[0]);
gimp_pixel_fetcher_get_pixel (pft, xi + 1, yi, pixel[1]);
gimp_pixel_fetcher_get_pixel (pft, xi, yi + 1, pixel[2]);
gimp_pixel_fetcher_get_pixel (pft, xi + 1, yi + 1, pixel[3]);
for (k = 0; k < bytes; k++)
{
values[0] = pixel[0][k];
values[1] = pixel[1][k];
values[2] = pixel[2][k];
values[3] = pixel[3][k];
val = gimp_bilinear_8 (needx, needy, values);
*dest++ = val;
} /* for */
}
destrow += dest_rgn.rowstride;
if (dvals.do_x)
mxrow += map_x_rgn.rowstride;
if (dvals.do_y)
myrow += map_y_rgn.rowstride;
}
if (!preview)
{
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
} /* for */
gimp_pixel_fetcher_destroy (pft);
/* detach from the map drawables */
if (dvals.do_x)
gimp_drawable_detach (map_x);
if (dvals.do_y)
gimp_drawable_detach (map_y);
if (preview)
{
/* gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);*/
gimp_preview_draw_buffer (preview, buffer, width * bytes);
g_free (buffer);
}
else
{
/* update the region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}