static void
ripple_horizontal (gint x,
gint y,
guchar *dest,
gint bpp,
gpointer data)
{
RippleParam_t *param = (RippleParam_t*) data;
GimpPixelFetcher *pft;
guchar pixel[2][4];
gdouble needx;
gint xi, xi_a, width;
pft = param->pft;
width = param->width;
needx = x + displace_amount(y);
xi = floor (needx);
xi_a = xi+1;
/* Tile the image. */
if (rvals.edges == WRAP)
{
needx = fmod((needx), width);
while (needx < 0.0)
needx += width;
xi = (xi % width);
while (xi < 0)
xi += width;
xi_a = (xi+1) % width;
}
/* Smear out the edges of the image by repeating pixels. */
else if (rvals.edges == SMEAR)
{
needx = CLAMP(needx , 0, width - 1);
xi = CLAMP(xi , 0, width - 1);
xi_a = CLAMP(xi + 1, 0, width - 1);
}
if (rvals.antialias)
{
if (xi >= 0 && xi < width)
gimp_pixel_fetcher_get_pixel (pft, xi, y, pixel[0]);
else
memset(pixel[0], 0, 4);
if (xi_a >= 0 && xi_a < width)
gimp_pixel_fetcher_get_pixel (pft, xi_a, y, pixel[1]);
else
memset(pixel[1], 0, 4);
average_two_pixels (dest, pixel, needx - xi, bpp, param->has_alpha);
} /* antialias */
else
{
if (xi >=0 && xi < width)
gimp_pixel_fetcher_get_pixel (pft, xi, y, dest);
else
memset(dest, 0, bpp);
}
}
static void
spread_func (gint x,
gint y,
guchar *dest,
gint bpp,
gpointer data)
{
SpreadParam_t *param = (SpreadParam_t*) data;
gdouble angle;
gint xdist, ydist;
gint xi, yi;
/* get random angle, x distance, and y distance */
xdist = (param->x_amount > 0
? g_rand_int_range (param->gr, -param->x_amount, param->x_amount)
: 0);
ydist = (param->y_amount > 0
? g_rand_int_range (param->gr, -param->y_amount, param->y_amount)
: 0);
angle = g_rand_double_range (param->gr, -G_PI, G_PI);
xi = x + floor (sin (angle) * xdist);
yi = y + floor (cos (angle) * ydist);
/* Only displace the pixel if it's within the bounds of the image. */
if (xi >= 0 && xi < param->width && yi >= 0 && yi < param->height)
{
gimp_pixel_fetcher_get_pixel (param->pft, xi, yi, dest);
}
else /* Else just copy it */
{
gimp_pixel_fetcher_get_pixel (param->pft, x, y, dest);
}
}
static void
ripple_vertical (gint x,
gint y,
guchar *dest,
gint bpp,
gpointer data)
{
RippleParam_t *param = (RippleParam_t*) data;
GimpPixelFetcher *pft;
guchar pixel[2][4];
gdouble needy;
gint yi, yi_a, height;
pft = param->pft;
height = param->height;
needy = y + displace_amount(x);
yi = floor(needy);
yi_a = yi+1;
/* Tile the image. */
if (rvals.edges == WRAP)
{
needy = fmod(needy, height);
if (needy < 0.0)
needy += height;
yi = (yi % height);
if (yi < 0)
yi += height;
yi_a = (yi+1) % height;
}
/* Smear out the edges of the image by repeating pixels. */
else if (rvals.edges == SMEAR)
{
needy= CLAMP (needy , 0, height - 1);
yi = CLAMP (yi , 0, height - 1);
yi_a = CLAMP (yi_a + 1, 0, height - 1);
}
if (rvals.antialias)
{
if (yi >=0 && yi < height)
gimp_pixel_fetcher_get_pixel (pft, x, yi , pixel[0]);
else
memset(pixel[0], 0, 4);
if (yi_a >=0 && yi_a < height)
gimp_pixel_fetcher_get_pixel (pft, x, yi_a, pixel[1]);
else
memset(pixel[1], 0, 4);
average_two_pixels (dest, pixel, needy - yi, bpp, param->has_alpha);
} /* antialias */
else
{
if (yi >=0 && yi < height)
gimp_pixel_fetcher_get_pixel (pft, x, yi, dest);
else
memset(dest, 0, bpp);
}
}
static PyObject *
pf_subscript(PyGimpPixelFetcher *self, PyObject *key)
{
PyObject *py_x, *py_y;
int x, y;
guchar pixel[4];
if (!PyTuple_Check(key) || PyTuple_Size(key) != 2) {
PyErr_SetString(PyExc_TypeError, "subscript must be a 2-tuple");
return NULL;
}
if (!PyArg_ParseTuple(key, "OO", &py_x, &py_y))
return NULL;
if (PyInt_Check(py_x)) {
if (PyInt_Check(py_y)) {
x = PyInt_AsLong(py_x);
y = PyInt_AsLong(py_y);
gimp_pixel_fetcher_get_pixel(self->pf, x, y, pixel);
return PyString_FromStringAndSize((char *)pixel, self->bpp);
} else {
PyErr_SetString(PyExc_TypeError, "invalid y subscript");
return NULL;
}
} else {
PyErr_SetString(PyExc_TypeError, "invalid x subscript");
return NULL;
}
}
/* -----------------------------
* p_pixel_check_opaque
* -----------------------------
* check average opacity in an area
* of 2x2 pixels
* return TRUE if average alpha is 50% or more opaque
*/
static gboolean
p_pixel_check_opaque(GimpPixelFetcher *pft, gint bpp, gdouble needx, gdouble needy)
{
guchar pixel[4][4];
gdouble alpha_val;
gint xi, yi;
gint alpha_idx;
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]);
alpha_idx = bpp -1;
/* average aplha channel normalized to range 0.0 upto 1.0 */
alpha_val = (
(gdouble)pixel[0][alpha_idx] / 255.0
+ (gdouble)pixel[1][alpha_idx] / 255.0
+ (gdouble)pixel[2][alpha_idx] / 255.0
+ (gdouble)pixel[3][alpha_idx] / 255.0
) / 4.0;
if (alpha_val > 0.5) /* fix THRESHOLD half or more opaque */
{
return (TRUE);
}
return (FALSE);
} /* end p_pixel_check_opaque */
static void
lens_distort_func (gint ix,
gint iy,
guchar *dest,
gint bpp,
GimpPixelFetcher *pft)
{
gdouble src_x, src_y, mag;
gdouble brighten;
guchar pixel_buffer[16 * LENS_MAX_PIXEL_DEPTH];
guchar *pixel;
gdouble dx, dy;
gint x_int, y_int;
gint x, y;
lens_get_source_coords (ix, iy, &src_x, &src_y, &mag);
brighten = 1.0 + mag * calc_vals.brighten;
x_int = floor (src_x);
dx = src_x - x_int;
y_int = floor (src_y);
dy = src_y - y_int;
pixel = pixel_buffer;
for (y = y_int - 1; y <= y_int + 2; y++)
{
for (x = x_int -1; x <= x_int + 2; x++)
{
if (x >= 0 && y >= 0 &&
x < drawable_width && y < drawable_height)
{
gimp_pixel_fetcher_get_pixel (pft, x, y, pixel);
}
else
{
gint i;
for (i = 0; i < bpp; i++)
pixel[i] = background_color[i];
}
pixel += bpp;
}
}
lens_cubic_interpolate (pixel_buffer, bpp * 4, bpp,
dest, bpp, dx, dy, brighten);
}
static void
polarize_func (gint x,
gint y,
guchar *dest,
gint bpp,
gpointer data)
{
double cx, cy;
if (calc_undistorted_coords (x, y, &cx, &cy))
{
guchar pixel1[4], pixel2[4], pixel3[4], pixel4[4];
guchar *values[4];
GimpPixelFetcher *pft = (GimpPixelFetcher*) data;
values[0] = pixel1;
values[1] = pixel2;
values[2] = pixel3;
values[3] = pixel4;
gimp_pixel_fetcher_get_pixel (pft, cx, cy, pixel1);
gimp_pixel_fetcher_get_pixel (pft, cx + 1, cy, pixel2);
gimp_pixel_fetcher_get_pixel (pft, cx, cy + 1, pixel3);
gimp_pixel_fetcher_get_pixel (pft, cx + 1, cy + 1, pixel4);
gimp_bilinear_pixels_8 (dest, cx, cy, bpp, img_has_alpha, values);
}
else
{
gint b;
for (b = 0; b < bpp; b++)
{
dest[b] = back_color[b];
}
}
}
static PyObject *
pf_get_pixel(PyGimpPixelFetcher *self, PyObject *args, PyObject *kwargs)
{
int x, y;
guchar pixel[4];
static char *kwlist[] = { "x", "y", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"ii:get_pixel", kwlist,
&x, &y))
return NULL;
gimp_pixel_fetcher_get_pixel(self->pf, x, y, pixel);
return PyString_FromStringAndSize((char *)pixel, self->bpp);
}
static void
mblur_linear (GimpDrawable *drawable,
GimpPreview *preview,
gint x1,
gint y1,
gint width,
gint height)
{
GimpPixelRgn dest_rgn;
GimpPixelFetcher *pft;
gpointer pr;
GimpRGB background;
guchar *dest;
guchar *d;
guchar pixel[4];
gint32 sum[4];
gint progress, max_progress;
gint c, p;
gint x, y, i, xx, yy, n;
gint dx, dy, px, py, swapdir, err, e, s1, s2;
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_context_get_background (&background);
gimp_pixel_fetcher_set_bg_color (pft, &background);
progress = 0;
max_progress = width * height;
n = mbvals.length;
px = (gdouble) n * cos (mbvals.angle / 180.0 * G_PI);
py = (gdouble) n * sin (mbvals.angle / 180.0 * G_PI);
/*
* Initialization for Bresenham algorithm:
* dx = abs(x2-x1), s1 = sign(x2-x1)
* dy = abs(y2-y1), s2 = sign(y2-y1)
*/
if ((dx = px) != 0)
{
if (dx < 0)
{
dx = -dx;
s1 = -1;
}
else
s1 = 1;
}
else
s1 = 0;
if ((dy = py) != 0)
{
if (dy < 0)
{
dy = -dy;
s2 = -1;
}
else
s2 = 1;
}
else
s2 = 0;
if (dy > dx)
{
swapdir = dx;
dx = dy;
dy = swapdir;
swapdir = 1;
}
else
swapdir = 0;
dy *= 2;
err = dy - dx; /* Initial error term */
dx *= 2;
for (pr = gimp_pixel_rgns_register (1, &dest_rgn), p = 0;
pr != NULL;
pr = gimp_pixel_rgns_process (pr), p++)
{
dest = dest_rgn.data;
for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
{
d = dest;
for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
{
xx = x; yy = y; e = err;
for (c = 0; c < img_bpp; c++)
sum[c]= 0;
for (i = 0; i < n; )
{
gimp_pixel_fetcher_get_pixel (pft, xx, yy, pixel);
if (has_alpha)
{
gint32 alpha = pixel[img_bpp-1];
sum[img_bpp-1] += alpha;
for (c = 0; c < img_bpp-1; c++)
sum[c] += pixel[c] * alpha;
}
else
{
for (c = 0; c < img_bpp; c++)
sum[c] += pixel[c];
}
i++;
while (e >= 0 && dx)
{
if (swapdir)
xx += s1;
else
yy += s2;
e -= dx;
}
if (swapdir)
yy += s2;
else
xx += s1;
e += dy;
if ((xx < x1) || (xx >= x1 + width) ||
(yy < y1) || (yy >= y1 + height))
break;
}
if (i == 0)
{
gimp_pixel_fetcher_get_pixel (pft, xx, yy, d);
}
else
{
if (has_alpha)
{
gint32 alpha = sum[img_bpp-1];
if ((d[img_bpp-1] = alpha/i) != 0)
{
for (c = 0; c < img_bpp-1; c++)
d[c] = sum[c] / alpha;
}
}
else
{
for (c = 0; c < img_bpp; c++)
d[c] = sum[c] / i;
}
}
d += dest_rgn.bpp;
}
dest += dest_rgn.rowstride;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += dest_rgn.w * dest_rgn.h;
if ((p % 8) == 0)
gimp_progress_update ((gdouble) progress / max_progress);
}
}
gimp_pixel_fetcher_destroy (pft);
}
static void
dialog_update_preview (GimpDrawable *drawable,
GimpPreview *preview)
{
gdouble cx, cy;
gint x, y;
gint sx, sy;
gint width, height;
guchar *pixel;
guchar outside[4];
GimpRGB background;
guchar *dest;
gint j;
gint bpp;
GimpPixelFetcher *pft;
guchar in_pixels[4][4];
guchar *in_values[4];
for (j = 0; j < 4; j++)
in_values[j] = in_pixels[j];
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_context_get_background (&background);
gimp_rgb_set_alpha (&background, 0.0);
gimp_drawable_get_color_uchar (drawable->drawable_id, &background, outside);
gimp_pixel_fetcher_set_bg_color (pft, &background);
gimp_pixel_fetcher_set_edge_mode (pft, GIMP_PIXEL_FETCHER_EDGE_SMEAR);
dest = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
&width, &height, &bpp);
pixel = dest;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
gimp_preview_untransform (preview, x, y, &sx, &sy);
if (calc_undistorted_coords ((gdouble)sx, (gdouble)sy,
&cx, &cy))
{
gimp_pixel_fetcher_get_pixel (pft, cx, cy, in_pixels[0]);
gimp_pixel_fetcher_get_pixel (pft, cx + 1, cy, in_pixels[1]);
gimp_pixel_fetcher_get_pixel (pft, cx, cy + 1, in_pixels[2]);
gimp_pixel_fetcher_get_pixel (pft, cx + 1, cy + 1, in_pixels[3]);
gimp_bilinear_pixels_8 (pixel, cx, cy, bpp,
img_has_alpha, in_values);
}
else
{
for (j = 0; j < bpp; j++)
pixel[j] = outside[j];
}
pixel += bpp;
}
}
gimp_pixel_fetcher_destroy (pft);
gimp_preview_draw_buffer (preview, dest, width * bpp);
g_free (dest);
}
static void
edge (GimpDrawable *drawable)
{
GimpPixelRgn src_rgn, dest_rgn;
gpointer pr;
GimpPixelFetcher *pft;
guchar *srcrow, *src;
guchar *destrow, *dest;
guchar pix00[4], pix01[4], pix02[4];
guchar pix10[4], pix11[4], pix12[4];
guchar pix20[4], pix21[4], pix22[4];
glong width, height;
gint alpha;
gboolean has_alpha;
gint chan;
gint x, y;
gint x1, y1, x2, y2;
gint maxval;
gint cur_progress;
gint max_progress;
gdouble per_progress;
if (evals.amount < 1.0)
evals.amount = 1.0;
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_pixel_fetcher_set_edge_mode (pft, evals.wrapmode);
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = gimp_drawable_width (drawable->drawable_id);
height = gimp_drawable_height (drawable->drawable_id);
alpha = gimp_drawable_bpp (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (has_alpha)
alpha--;
maxval = 255;
cur_progress = 0;
per_progress = 0.0;
max_progress = (x2 - x1) * (y2 - y1) / 100;
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, x2-x1, y2-y1, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, x2-x1, y2-y1, TRUE, TRUE);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
srcrow = src_rgn.data;
destrow = dest_rgn.data;
for (y = dest_rgn.y;
y < (dest_rgn.y + dest_rgn.h);
y++, srcrow += src_rgn.rowstride, destrow += dest_rgn.rowstride)
{
src = srcrow;
dest = destrow;
for (x = dest_rgn.x;
x < (dest_rgn.x + dest_rgn.w);
x++, src += src_rgn.bpp, dest += dest_rgn.bpp)
{
if (dest_rgn.x < x && x < dest_rgn.x + dest_rgn.w - 2 &&
dest_rgn.y < y && y < dest_rgn.y + dest_rgn.h - 2)
{
/*
* 3x3 kernel is inside of the tile -- do fast
* version
*/
for (chan = 0; chan < alpha; chan++)
{
/* get the 3x3 kernel into a guchar array,
* and send it to edge_detect */
guchar kernel[9];
gint i,j;
#define PIX(X,Y) src[ (Y-1)*(int)src_rgn.rowstride + (X-1)*(int)src_rgn.bpp + chan ]
/* make convolution */
for(i = 0; i < 3; i++)
for(j = 0; j < 3; j++)
kernel[3*i + j] = PIX(i,j);
#undef PIX
dest[chan] = edge_detect (kernel);
}
}
else
{
/*
* The kernel is not inside of the tile -- do slow
* version
*/
gimp_pixel_fetcher_get_pixel (pft, x-1, y-1, pix00);
gimp_pixel_fetcher_get_pixel (pft, x , y-1, pix10);
gimp_pixel_fetcher_get_pixel (pft, x+1, y-1, pix20);
gimp_pixel_fetcher_get_pixel (pft, x-1, y , pix01);
gimp_pixel_fetcher_get_pixel (pft, x , y , pix11);
gimp_pixel_fetcher_get_pixel (pft, x+1, y , pix21);
gimp_pixel_fetcher_get_pixel (pft, x-1, y+1, pix02);
gimp_pixel_fetcher_get_pixel (pft, x , y+1, pix12);
gimp_pixel_fetcher_get_pixel (pft, x+1, y+1, pix22);
for (chan = 0; chan < alpha; chan++)
{
guchar kernel[9];
kernel[0] = pix00[chan];
kernel[1] = pix01[chan];
kernel[2] = pix02[chan];
kernel[3] = pix10[chan];
kernel[4] = pix11[chan];
kernel[5] = pix12[chan];
kernel[6] = pix20[chan];
kernel[7] = pix21[chan];
kernel[8] = pix22[chan];
dest[chan] = edge_detect (kernel);
}
}
if (has_alpha)
dest[alpha] = src[alpha];
}
}
cur_progress += dest_rgn.w * dest_rgn.h;
if (cur_progress > max_progress)
{
cur_progress = cur_progress - max_progress;
per_progress = per_progress + 0.01;
gimp_progress_update (per_progress);
}
}
gimp_progress_update (1.0);
gimp_pixel_fetcher_destroy (pft);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
}
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);
}
}
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);
}
}
/* --------------------------------
* p_generateWorkpoints
* --------------------------------
* scan the edge drawable with descending grid size (defined stepSizeTab)
* and descending edge threshold. This shall spread the generated
* workpoints all over the whole area where bright edge points
* are picked first.
*/
static void
p_generateWorkpoints(GapMorphShapeContext *msctx, GapMorphGlobalParams *mgpp)
{
#define LOOP_LOOKUP_TAB_SIZE 5
static gint32 edgeThresTab[LOOP_LOOKUP_TAB_SIZE] = { 120, 60, 30, 10, 1 };
static gint32 nearRadiusTab[LOOP_LOOKUP_TAB_SIZE] = { 20, 14, 10, 6, 2 };
static gint32 stepSizeTab[LOOP_LOOKUP_TAB_SIZE] = { 10, 8, 6, 2, 1 };
gint32 ex;
gint32 ey;
gdouble srcX;
gdouble srcY;
gint32 nearRadius;
gint32 edgePixelThreshold255;
gint32 stepSize;
gint32 ii;
for(ii=0; ii < LOOP_LOOKUP_TAB_SIZE; ii++)
{
edgePixelThreshold255 = edgeThresTab[ii];
nearRadius = nearRadiusTab[ii];
stepSize = stepSizeTab[ii];
for(ey=msctx->sel1Y; ey < msctx->sel2Y; ey += stepSize)
{
srcY = ey +1;
for(ex=msctx->sel1X; ex < msctx->sel2X; ex += stepSize)
{
guchar pixel[4];
if(*msctx->cancelWorkpointGenerationPtr == TRUE)
{
return;
}
gimp_pixel_fetcher_get_pixel (msctx->pftEdge, ex, ey, &pixel[0]);
if(pixel[0] >= edgePixelThreshold255)
{
/* found an edge pixel */
GapMorphWorkPoint *wp;
srcX = ex +1;
/* chek if workpoint with this (or very near) coords does already exist */
wp = p_find_workpoint_near_src_coords(mgpp
, srcX
, srcY
, nearRadius
);
if(wp == NULL)
{
gboolean success;
gdouble dstX;
gdouble dstY;
gdouble locateColordiff;
success = p_locate_workpoint(msctx
, srcX, srcY
, &dstX, &dstY
, &locateColordiff
);
if(success)
{
wp = gap_morph_shape_new_workpont(srcX, srcY, dstX, dstY);
wp->locateColordiff = locateColordiff;
if(TRUE == p_workpoint_plausiblity_filter(msctx
, mgpp
, wp
))
{
msctx->countGeneratedPoints++;
/* add new workpoint as 1st listelement */
wp->next = mgpp->master_wp_list;
mgpp->master_wp_list = wp;
p_doProgress(msctx);
if(msctx->countGeneratedPoints >= msctx->numShapePoints)
{
return;
}
}
else
{
g_free(wp);
}
}
}
}
}
}
}
} /* end p_generateWorkpoints */
static void
mblur_radial (GimpDrawable *drawable,
GimpPreview *preview,
gint x1,
gint y1,
gint width,
gint height)
{
GimpPixelRgn dest_rgn;
GimpPixelFetcher *pft;
gpointer pr;
GimpRGB background;
gdouble center_x;
gdouble center_y;
guchar *dest;
guchar *d;
guchar pixel[4];
guchar p1[4], p2[4], p3[4], p4[4];
gint32 sum[4];
gint progress, max_progress, c;
gint x, y, i, p, n, count;
gdouble angle, theta, r, xx, yy, xr, yr;
gdouble phi, phi_start, s_val, c_val;
gdouble dx, dy;
/* initialize */
xx = 0.0;
yy = 0.0;
center_x = mbvals.center_x;
center_y = mbvals.center_y;
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_context_get_background (&background);
gimp_pixel_fetcher_set_bg_color (pft, &background);
progress = 0;
max_progress = width * height;
angle = gimp_deg_to_rad (mbvals.angle);
for (pr = gimp_pixel_rgns_register (1, &dest_rgn), p = 0;
pr != NULL;
pr = gimp_pixel_rgns_process (pr), p++)
{
dest = dest_rgn.data;
for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
{
d = dest;
for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
{
xr = (gdouble) x - center_x;
yr = (gdouble) y - center_y;
r = sqrt (SQR (xr) + SQR (yr));
n = r * angle;
if (angle == 0.0)
{
gimp_pixel_fetcher_get_pixel (pft, x, y, d);
d += dest_rgn.bpp;
continue;
}
/* ensure quality with small angles */
if (n < 3)
n = 3; /* always use at least 3 (interpolation) steps */
/* limit loop count due to performanc reasons */
if (n > 100)
n = 100 + sqrt (n-100);
if (xr != 0.0)
{
phi = atan(yr/xr);
if (xr < 0.0)
phi = G_PI + phi;
}
else
{
if (yr >= 0.0)
phi = G_PI_2;
else
phi = -G_PI_2;
}
for (c = 0; c < img_bpp; c++)
sum[c] = 0;
if (n == 1)
phi_start = phi;
else
phi_start = phi + angle/2.0;
theta = angle / (gdouble)n;
count = 0;
for (i = 0; i < n; i++)
{
s_val = sin (phi_start - (gdouble) i * theta);
c_val = cos (phi_start - (gdouble) i * theta);
xx = center_x + r * c_val;
yy = center_y + r * s_val;
if ((yy < y1) || (yy >= y1 + height) ||
(xx < x1) || (xx >= x1 + width))
continue;
++count;
if ((xx + 1 < x1 + width) && (yy + 1 < y1 + height))
{
dx = xx - floor (xx);
dy = yy - floor (yy);
gimp_pixel_fetcher_get_pixel (pft, xx, yy, p1);
gimp_pixel_fetcher_get_pixel (pft, xx+1, yy, p2);
gimp_pixel_fetcher_get_pixel (pft, xx, yy+1, p3);
gimp_pixel_fetcher_get_pixel (pft, xx+1, yy+1, p4);
for (c = 0; c < img_bpp; c++)
{
pixel[c] = (((gdouble) p1[c] * (1.0-dx) +
(gdouble) p2[c] * dx) * (1.0-dy) +
((gdouble) p3[c] * (1.0-dx) +
(gdouble) p4[c] * dx) * dy);
}
}
else
{
gimp_pixel_fetcher_get_pixel (pft, xx+.5, yy+.5, pixel);
}
if (has_alpha)
{
gint32 alpha = pixel[img_bpp-1];
sum[img_bpp-1] += alpha;
for (c = 0; c < img_bpp-1; c++)
sum[c] += pixel[c] * alpha;
}
else
{
for (c = 0; c < img_bpp; c++)
sum[c] += pixel[c];
}
}
if (count == 0)
{
gimp_pixel_fetcher_get_pixel (pft, xx, yy, d);
}
else
{
if (has_alpha)
{
gint32 alpha = sum[img_bpp-1];
if ((d[img_bpp-1] = alpha/count) != 0)
{
for (c = 0; c < img_bpp-1; c++)
d[c] = sum[c] / alpha;
}
}
else
{
for (c = 0; c < img_bpp; c++)
d[c] = sum[c] / count;
}
}
d += dest_rgn.bpp;
}
dest += dest_rgn.rowstride;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += dest_rgn.w * dest_rgn.h;
if ((p % 8) == 0)
gimp_progress_update ((gdouble) progress / max_progress);
}
}
gimp_pixel_fetcher_destroy (pft);
}
static void
mblur_zoom (GimpDrawable *drawable,
GimpPreview *preview,
gint x1,
gint y1,
gint width,
gint height)
{
GimpPixelRgn dest_rgn;
GimpPixelFetcher *pft;
gpointer pr;
GimpRGB background;
gdouble center_x;
gdouble center_y;
guchar *dest, *d;
guchar pixel[4];
guchar p1[4], p2[4], p3[4], p4[4];
gint32 sum[4];
gint progress, max_progress;
gint x, y, i, n, p, c;
gdouble xx_start, xx_end, yy_start, yy_end;
gdouble xx, yy;
gdouble dxx, dyy;
gdouble dx, dy;
gint xy_len;
gdouble f, r;
gint drawable_x1, drawable_y1;
gint drawable_x2, drawable_y2;
/* initialize */
xx = 0.0;
yy = 0.0;
center_x = mbvals.center_x;
center_y = mbvals.center_y;
gimp_drawable_mask_bounds (drawable->drawable_id,
&drawable_x1, &drawable_y1,
&drawable_x2, &drawable_y2);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_context_get_background (&background);
gimp_pixel_fetcher_set_bg_color (pft, &background);
progress = 0;
max_progress = width * height;
n = mbvals.length;
if (n == 0)
n = 1;
r = sqrt (SQR (drawable->width / 2) + SQR (drawable->height / 2));
n = ((gdouble) n * r / MBLUR_LENGTH_MAX);
f = (r-n)/r;
for (pr = gimp_pixel_rgns_register (1, &dest_rgn), p = 0;
pr != NULL;
pr = gimp_pixel_rgns_process (pr), p++)
{
dest = dest_rgn.data;
for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
{
d = dest;
for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
{
for (c = 0; c < img_bpp; c++)
sum[c] = 0;
xx_start = x;
yy_start = y;
if (mbvals.blur_outward)
{
xx_end = center_x + ((gdouble) x - center_x) * f;
yy_end = center_y + ((gdouble) y - center_y) * f;
}
else
{
xx_end = center_x + ((gdouble) x - center_x) * (1.0/f);
yy_end = center_y + ((gdouble) y - center_y) * (1.0/f);
}
xy_len = sqrt (SQR (xx_end-xx_start) + SQR (yy_end-yy_start)) + 1;
if (xy_len < 3)
xy_len = 3;
dxx = (xx_end - xx_start) / (gdouble) xy_len;
dyy = (yy_end - yy_start) / (gdouble) xy_len;
xx = xx_start;
yy = yy_start;
for (i = 0; i < xy_len; i++)
{
if ((yy < drawable_y1) || (yy >= drawable_y2) ||
(xx < drawable_x1) || (xx >= drawable_x2))
break;
if ((xx+1 < drawable_x2) && (yy+1 < drawable_y2))
{
dx = xx - floor (xx);
dy = yy - floor (yy);
gimp_pixel_fetcher_get_pixel (pft, xx, yy, p1);
gimp_pixel_fetcher_get_pixel (pft, xx+1, yy, p2);
gimp_pixel_fetcher_get_pixel (pft, xx, yy+1, p3);
gimp_pixel_fetcher_get_pixel (pft, xx+1, yy+1, p4);
for (c = 0; c < img_bpp; c++)
{
pixel[c] = (((gdouble)p1[c] * (1.0-dx) +
(gdouble)p2[c] * dx) * (1.0-dy) +
((gdouble)p3[c] * (1.0-dx) +
(gdouble)p4[c] * dx) * dy);
}
}
else
{
gimp_pixel_fetcher_get_pixel (pft, xx+.5, yy+.5, pixel);
}
if (has_alpha)
{
gint32 alpha = pixel[img_bpp-1];
sum[img_bpp-1] += alpha;
for (c = 0; c < img_bpp-1; c++)
sum[c] += pixel[c] * alpha;
}
else
{
for (c = 0; c < img_bpp; c++)
sum[c] += pixel[c];
}
xx += dxx;
yy += dyy;
}
if (i == 0)
{
gimp_pixel_fetcher_get_pixel (pft, xx, yy, d);
}
else
{
if (has_alpha)
{
gint32 alpha = sum[img_bpp-1];
if ((d[img_bpp-1] = alpha/i) != 0)
{
for (c = 0; c < img_bpp-1; c++)
d[c] = sum[c] / alpha;
}
}
else
{
for (c = 0; c < img_bpp; c++)
d[c] = sum[c] / i;
}
}
d += dest_rgn.bpp;
}
dest += dest_rgn.rowstride;
}
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&dest_rgn);
}
else
{
progress += dest_rgn.w * dest_rgn.h;
if ((p % 8) == 0)
gimp_progress_update ((gdouble) progress / max_progress);
}
}
gimp_pixel_fetcher_destroy (pft);
}
/* ---------------------------------
* p_edgeProcessingForOneRegion
* ---------------------------------
* render edge drawable for the current processed pixel region.
* (use a pixelfetcher on region boundaries)
*/
static void
p_edgeProcessingForOneRegion (const GimpPixelRgn *refPR
,const GimpPixelRgn *edgePR
,GapEdgeContext *ectx)
{
guint row;
guchar* ref = refPR->data;
guchar* edge = edgePR->data;
guchar rightPixel[4];
guchar botPixel[4];
guchar rbPixel[4];
guchar* rightPixelPtr;
guchar* botPixelPtr;
guchar* rbPixelPtr;
gint32 rx;
gint32 ry;
gboolean debugPrint;
if(gap_debug)
{
printf("p_edgeProcessingForOneRegion START\n");
}
debugPrint = FALSE;
for (row = 0; row < edgePR->h; row++)
{
guint col;
guint idxref;
guint idxedge;
ry = refPR->y + row;
idxref = 0;
idxedge = 0;
for(col = 0; col < edgePR->w; col++)
{
gdouble colordiff1;
gdouble colordiff2;
gdouble colordiff3;
gdouble maxColordiff;
gboolean isColorCompareRequired;
rbPixelPtr = &ref[idxref];
rx = refPR->x + col;
isColorCompareRequired = TRUE;
/*
* if(gap_debug)
* {
* debugPrint = FALSE;
* if((rx == 596) || (rx == 597))
* {
* if((ry==818) ||(ry==818))
* {
* debugPrint = TRUE;
* }
* }
* }
*/
if(col < edgePR->w -1)
{
rightPixelPtr = &ref[idxref + refPR->bpp];
if(row < edgePR->h -1)
{
rbPixelPtr = &ref[idxref + refPR->bpp + refPR->rowstride];
}
}
else if(rx >= ectx->refDrawable->width -1)
{
/* drawable border is not considered as edge */
rightPixelPtr = &ref[idxref];
}
else
{
rightPixelPtr = &rightPixel[0];
gimp_pixel_fetcher_get_pixel (ectx->pftRef, rx +1, ry, rightPixelPtr);
if(ry >= ectx->refDrawable->height -1)
{
rbPixelPtr = &rbPixel[0];
gimp_pixel_fetcher_get_pixel (ectx->pftRef, rx +1, ry +1, rbPixelPtr);
}
}
if(row < edgePR->h -1)
{
botPixelPtr = &ref[idxref + refPR->rowstride];
}
else if(ry >= ectx->refDrawable->height -1)
{
/* drawable border is not considered as edge */
botPixelPtr = &ref[idxref];
}
else
{
botPixelPtr = &botPixel[0];
gimp_pixel_fetcher_get_pixel (ectx->pftRef, rx, ry +1, botPixelPtr);
}
if(refPR->bpp > 3)
{
/* reference drawable has alpha channel
* in this case significant changes of opacity shall detect edge
*/
gint32 maxAlphaDiff;
maxAlphaDiff = MAX(abs(ref[idxref +3] - rightPixelPtr[3])
,abs(ref[idxref +3] - botPixelPtr[3]));
maxAlphaDiff = MAX(maxAlphaDiff
,abs(ref[idxref +3] - rbPixelPtr[3]));
if(debugPrint)
{
printf("rx:%d ry:%d idxref:%d idxedge:%d (maxAlphaDiff):%d Thres:%d Alpha ref:%d right:%d bot:%d rb:%d\n"
, (int)rx
, (int)ry
, (int)idxref
, (int)idxedge
, (int)maxAlphaDiff
, (int)ectx->edgeOpacityThreshold255
, (int)ref[idxref +3]
, (int)rightPixelPtr[3]
, (int)botPixelPtr[3]
, (int)rbPixelPtr[3]
);
}
if(maxAlphaDiff > ectx->edgeOpacityThreshold255)
{
ectx->countEdgePixels++;
edge[idxedge] = maxAlphaDiff;
isColorCompareRequired = FALSE;
}
else if(ref[idxref +3] < OPACITY_LEVEL_UCHAR)
{
/* transparent pixel is not considered as edge */
edge[idxedge] = 0;
isColorCompareRequired = FALSE;
}
}
if(isColorCompareRequired == TRUE)
{
colordiff1 = gap_colordiff_simple_guchar(&ref[idxref]
, &rightPixelPtr[0]
, debugPrint /* debugPrint */
);
colordiff2 = gap_colordiff_simple_guchar(&ref[idxref]
, &botPixelPtr[0]
, debugPrint /* debugPrint */
);
colordiff3 = gap_colordiff_simple_guchar(&ref[idxref]
, &rbPixelPtr[0]
, debugPrint /* debugPrint */
);
maxColordiff = MAX(colordiff1, colordiff2);
maxColordiff = MAX(maxColordiff, colordiff3);
if(debugPrint)
{
printf("rx:%d ry:%d colordiff(1): %.5f (2):%.5f (3):%.5f (max):%.5f Thres:%.5f\n"
, (int)rx
, (int)ry
, (float)colordiff1
, (float)colordiff2
, (float)colordiff3
, (float)maxColordiff
, (float)ectx->edgeColordiffThreshold
);
}
if (maxColordiff < ectx->edgeColordiffThreshold)
{
edge[idxedge] = 0;
}
else
{
gdouble value;
value = maxColordiff * 255.0;
edge[idxedge] = CLAMP(value, 1, 255);
ectx->countEdgePixels++;
}
}
idxref += refPR->bpp;
idxedge += edgePR->bpp;
}
ref += refPR->rowstride;
edge += edgePR->rowstride;
}
} /* end p_edgeProcessingForOneRegion */
