/**
* gimp_drawable_get:
* @drawable_ID: the ID of the drawable
*
* This function creates a #GimpDrawable structure for the core
* drawable identified by @drawable_ID. The returned structure
* contains some basic information about the drawable and can also
* hold tile data for transfer to and from the core.
*
* Note that the name of this function is somewhat misleading, because
* it suggests that it simply returns a handle. This is not the case:
* if the function is called multiple times, it creates separate tile
* lists each time, which will usually produce undesired results.
*
* When a plug-in has finished working with a drawable, before exiting
* it should call gimp_drawable_detach() to make sure that all tile data is
* transferred back to the core.
*
* Return value: a new #GimpDrawable wrapper
**/
GimpDrawable *
gimp_drawable_get (gint32 drawable_ID)
{
GimpDrawable *drawable;
gint width;
gint height;
gint bpp;
width = gimp_drawable_width (drawable_ID);
height = gimp_drawable_height (drawable_ID);
bpp = gimp_drawable_bpp (drawable_ID);
g_return_val_if_fail (width > 0 && height > 0 && bpp > 0, NULL);
drawable = g_slice_new0 (GimpDrawable);
drawable->drawable_id = drawable_ID;
drawable->width = width;
drawable->height = height;
drawable->bpp = bpp;
drawable->ntile_rows = (height + TILE_HEIGHT - 1) / TILE_HEIGHT;
drawable->ntile_cols = (width + TILE_WIDTH - 1) / TILE_WIDTH;
return drawable;
}
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);
width = preview->width;
height = preview->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 gboolean
preview_event_handler (GtkWidget *area,
GdkEvent *event,
GtkWidget *preview)
{
gint pos;
guchar *buf;
guint32 drawable_id;
GimpRGB color;
GdkEventButton *button_event = (GdkEventButton *)event;
buf = GIMP_PREVIEW_AREA (area)->buf;
drawable_id = GIMP_DRAWABLE_PREVIEW (preview)->drawable->drawable_id;
switch (event->type)
{
case GDK_BUTTON_PRESS:
if (button_event->button == 2)
{
pos = event->button.x * gimp_drawable_bpp (drawable_id) +
event->button.y * GIMP_PREVIEW_AREA (area)->rowstride;
gimp_rgb_set_uchar (&color, buf[pos], buf[pos + 1], buf[pos + 2]);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (from_colorbutton),
&color);
}
break;
default:
break;
}
return FALSE;
}
static void getrange (GimpDrawable *drawable, guchar *mintab, guchar *maxtab, gint x1, gint y1, gint x2, gint y2)
{
gint i, j, k, channels;
GimpPixelRgn rgn_in;
guchar *inrow;
channels = gimp_drawable_bpp (drawable->drawable_id);
gimp_pixel_rgn_init (&rgn_in, drawable, x1, y1, x2 - x1, y2 - y1, FALSE, FALSE);
inrow = g_new (guchar, channels * (x2 - x1));
for (j = 0; j < 4; j++){
mintab[j]=255;
maxtab[j]=0;
}
for (i = y1; i < y2; i++)
{
/* Get row i */
gimp_pixel_rgn_get_row (&rgn_in, inrow, x1, i, x2 - x1);
for (j = x1; j < x2; j++)
{
for (k = 0; k < channels; k++){
mintab[k]=MIN ( inrow[channels * (j - x1) + k], mintab[k] ) ;
maxtab[k]=MAX ( inrow[channels * (j - x1) + k], maxtab[k] ) ;
}
}
}
g_free (inrow);
}
void
precompute_init (gint w,
gint h)
{
gint n;
gint bpp=1;
xstep = 1.0 / (gdouble) width;
ystep = 1.0 / (gdouble) height;
pre_w = w;
pre_h = h;
for (n = 0; n < 3; n++)
{
if (vertex_normals[n] != NULL)
g_free (vertex_normals[n]);
if (heights[n] != NULL)
g_free (heights[n]);
heights[n] = g_new (gdouble, w);
vertex_normals[n] = g_new (GimpVector3, w);
}
for (n = 0; n < 2; n++)
if (triangle_normals[n] != NULL)
g_free (triangle_normals[n]);
if (bumprow != NULL)
{
g_free (bumprow);
bumprow = NULL;
}
if (mapvals.bumpmap_id != -1)
{
bpp = gimp_drawable_bpp(mapvals.bumpmap_id);
}
bumprow = g_new (guchar, w * bpp);
triangle_normals[0] = g_new (GimpVector3, (w << 1) + 2);
triangle_normals[1] = g_new (GimpVector3, (w << 1) + 2);
for (n = 0; n < (w << 1) + 1; n++)
{
gimp_vector3_set (&triangle_normals[0][n], 0.0, 0.0, 1.0);
gimp_vector3_set (&triangle_normals[1][n], 0.0, 0.0, 1.0);
}
for (n = 0; n < w; n++)
{
gimp_vector3_set (&vertex_normals[0][n], 0.0, 0.0, 1.0);
gimp_vector3_set (&vertex_normals[1][n], 0.0, 0.0, 1.0);
gimp_vector3_set (&vertex_normals[2][n], 0.0, 0.0, 1.0);
heights[0][n] = 0.0;
heights[1][n] = 0.0;
heights[2][n] = 0.0;
}
}
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);
}
static gboolean
sel2path (gint32 image_ID)
{
gint32 selection_ID;
GimpDrawable *sel_drawable;
pixel_outline_list_type olt;
spline_list_array_type splines;
gimp_selection_bounds (image_ID, &has_sel,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
/* Now get the selection channel */
selection_ID = gimp_image_get_selection (image_ID);
if (selection_ID < 0)
return FALSE;
sel_drawable = gimp_drawable_get (selection_ID);
if (gimp_drawable_bpp (selection_ID) != 1)
{
g_warning ("Internal error. Selection bpp > 1");
return FALSE;
}
gimp_pixel_rgn_init (&selection_rgn, sel_drawable,
sel_x1, sel_y1, sel_width, sel_height,
FALSE, FALSE);
gimp_tile_cache_ntiles (2 * (sel_drawable->width + gimp_tile_width () - 1) /
gimp_tile_width ());
olt = find_outline_pixels ();
splines = fitted_splines (olt);
do_points (splines, image_ID);
gimp_drawable_detach (sel_drawable);
gimp_displays_flush ();
return TRUE;
}
static gint32 load_raw(
char* filename,
FILE* file,
enum pix_fmt fmt,
struct raw_data* img_data,
const gchar* plugin_name
) {
gint nr_chls;
gint x, y;
gint32 img;
gint32 layer;
GimpDrawable* drawable;
GimpPixelRgn pixel_rgn;
guchar *pix_row;
guint width = img_data->size[0];
guint height = img_data->size[1];
if (width <= 0 || height <= 0) {
return ERROR;
}
img = create_new_image(filename, NULL, width, height, GIMP_RGB, &layer,
&drawable, &pixel_rgn);
nr_chls = gimp_drawable_bpp(drawable->drawable_id);
pix_row = g_new(guchar, nr_chls * width);
x = 0;
y = 0;
while (1) {
guchar rgb[3];
if (read_rgb_pixel(file, fmt, rgb) == ERROR)
return ERROR;
pix_row[nr_chls * x] = rgb[IDX_RED];
pix_row[nr_chls * x + 1] = rgb[IDX_GREEN];
pix_row[nr_chls * x + 2] = rgb[IDX_BLUE];
x++;
if (x == width) {
gimp_pixel_rgn_set_row(&pixel_rgn, pix_row, 0, y, width);
x = 0;
y++;
}
if (y == height) break;
}
if (fgetc(file) != EOF) {
printf("%s: warning: file contains more data\n", plugin_name);
}
return img;
}
/*
Returns NGRADSAMPLES samples of active gradient.
Each sample has (gimp_drawable_bpp (drawable_id)) bytes.
"ripped" from gradmap.c.
*/
static guchar *
get_gradient_samples (gint32 drawable_id,
gboolean reverse)
{
gchar *gradient_name;
gint n_f_samples;
gdouble *f_samples, *f_samp; /* float samples */
guchar *b_samples, *b_samp; /* byte samples */
gint bpp, color, has_alpha, alpha;
gint i, j;
gradient_name = gimp_context_get_gradient ();
gimp_gradient_get_uniform_samples (gradient_name, NGRADSAMPLES, reverse,
&n_f_samples, &f_samples);
g_free (gradient_name);
bpp = gimp_drawable_bpp (drawable_id);
color = gimp_drawable_is_rgb (drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable_id);
alpha = (has_alpha ? bpp - 1 : bpp);
b_samples = g_new (guchar, NGRADSAMPLES * bpp);
for (i = 0; i < NGRADSAMPLES; i++)
{
b_samp = &b_samples[i * bpp];
f_samp = &f_samples[i * 4];
if (color)
for (j = 0; j < 3; j++)
b_samp[j] = f_samp[j] * 255;
else
b_samp[0] = GIMP_RGB_LUMINANCE (f_samp[0], f_samp[1], f_samp[2]) * 255;
if (has_alpha)
b_samp[alpha] = f_samp[3] * 255;
}
g_free (f_samples);
return b_samples;
}
static void blur (GimpDrawable *drawable) {
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar *row1, *row2, *row3;
guchar *outrow;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
gimp_pixel_rgn_init (&rgn_in, drawable, x1, y1, x2 - x1, y2 - y1, FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out, drawable, x1, y1, x2 - x1, y2 - y1, TRUE, TRUE);
/* Initialise enough memory for row1, row2, row3, outrow */
row1 = g_new (guchar, channels * (x2 - x1));
outrow = g_new (guchar, channels * (x2 - x1));
for (i = y1; i < y2; i++) {
/* Get row i-1, i, i+1 */
gimp_pixel_rgn_get_row (&rgn_in, row1, x1, MAX (y1, i - 1), x2 - x1);
for (j = x1; j < x2; j++) {
/* For each layer, compute the average of the nine pixels */
for (k = 0; k < channels; k++) {
int in = row1[channels * (j - x1) + k];
int a = (1.0 - (in / 255.0)) * 100.0;
int r = rand() % 100;
outrow[channels * (j - x1) + k] = r < a ? 0 : 255;
}
}
gimp_pixel_rgn_set_row (&rgn_out, outrow, x1, i, x2 - x1);
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - y1) / (gdouble) (y2 - y1));
}
g_free (row1);
g_free (outrow);
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 int
pf_init(PyGimpPixelFetcher *self, PyObject *args, PyObject *kwargs)
{
PyGimpDrawable *drw;
gboolean shadow = FALSE;
GimpRGB bg_color = { 0.0, 0.0, 0.0, 1.0 };
GimpPixelFetcherEdgeMode edge_mode = GIMP_PIXEL_FETCHER_EDGE_NONE;
static char *kwlist[] = { "drawable", "shadow", "bg_color", "edge_mode",
NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"O!|iO&i:gimp.PixelFetcher.__init__",
kwlist,
&PyGimpDrawable_Type, &drw, &shadow,
pygimp_rgb_from_pyobject, &bg_color,
&edge_mode))
return -1;
if(!drw->drawable)
drw->drawable = gimp_drawable_get(drw->ID);
self->pf = gimp_pixel_fetcher_new(drw->drawable, shadow);
Py_INCREF(drw);
self->drawable = drw;
self->shadow = shadow;
self->bg_color = bg_color;
self->edge_mode = edge_mode;
self->bpp = gimp_drawable_bpp(drw->drawable->drawable_id);
gimp_pixel_fetcher_set_bg_color(self->pf, &bg_color);
gimp_pixel_fetcher_set_edge_mode(self->pf, edge_mode);
return 0;
}
static void
despeckle (void)
{
GimpPixelRgn src_rgn; /* Source image region */
GimpPixelRgn dst_rgn;
guchar *src;
guchar *dst;
gint img_bpp;
gint x, y;
gint width, height;
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&x, &y, &width, &height))
return;
gimp_pixel_rgn_init (&src_rgn, drawable, x, y, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dst_rgn, drawable, x, y, width, height, TRUE, TRUE);
src = g_new (guchar, width * height * img_bpp);
dst = g_new (guchar, width * height * img_bpp);
gimp_pixel_rgn_get_rect (&src_rgn, src, x, y, width, height);
despeckle_median (src, dst, width, height, img_bpp, despeckle_radius, FALSE);
gimp_pixel_rgn_set_rect (&dst_rgn, dst, x, y, width, height);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x, y, width, height);
g_free (dst);
g_free (src);
}
static void
exponential (GimpDrawable *drawable)
{
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar output[4];
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1,
&x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in,
drawable,
x1, y1,
x2 - x1, y2 - y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out,
drawable,
x1, y1,
x2 - x1, y2 - y1,
TRUE, TRUE);
/*
guchar minp[4],maxp[4];
for (j = 0; j < 4; j++){
minp[j]=255;
maxp[j]=0;
}
for (i = x1; i < x2; i++){
for (j = y1; j < y2; j++){
guchar pixel[4];
gimp_pixel_rgn_get_pixel (&rgn_in, pixel, i, j);
for (k = 0; k < channels; k++){
if(minp[k]>pixel[k]) minp[k]=pixel[k];
if(maxp[k]<pixel[k]) maxp[k]=pixel[k];
}
} }
*/
for (i = x1; i < x2; i++)
{
for (j = y1; j < y2; j++)
{
/* guchar pixel[9][4]; */
guchar pixel[4];
/* Get ONE pixel */
/* gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[0],
MAX (i - 1, x1), MAX (j - 1, y1));
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[1],
MAX (i - 1, x1), j);
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[2],
MAX (i - 1, x1), MIN (j + 1, y2 - 1));
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[3],
i, MAX (j - 1, y1)); */
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel, /*[4]*/
i, j);
/* gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[5],
i, MIN (j + 1, y2 - 1));
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[6],
MIN (i + 1, x2 - 1), MAX (j - 1, y1));
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[7],
MIN (i + 1, x2 - 1), j);
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel[8],
MIN (i + 1, x2 - 1), MIN (j + 1, y2 - 1));
*/
/* For each layer, compute the exponential color code
(255*(-1 +exp(code))/(-1 +exp(255)) ) */
for (k = 0; k < channels; k++)
{
double ex = exp(pixel[k])-1, max=exp(255)-1;
output[k] = (guchar)(255 *(ex/max));
}
gimp_pixel_rgn_set_pixel (&rgn_out,
output,
i, j);
} /*end for j*/
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - x1) / (gdouble) (x2 - x1));
} /*end for i*/
/* Update the modified region */
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
compose_row (gint frame_num,
DisposeType dispose,
gint row_num,
guchar *dest,
gint dest_width,
GimpDrawable *drawable,
gboolean cleanup)
{
static guchar *line_buf = NULL;
guchar *srcptr;
GimpPixelRgn pixel_rgn;
gint rawx, rawy, rawbpp, rawwidth, rawheight;
gint i;
gboolean has_alpha;
if (cleanup)
{
if (line_buf)
{
g_free (line_buf);
line_buf = NULL;
}
return;
}
if (dispose == DISPOSE_REPLACE)
{
total_alpha (dest, dest_width, pixelstep);
}
gimp_drawable_offsets (drawable->drawable_id,
&rawx,
&rawy);
rawheight = gimp_drawable_height (drawable->drawable_id);
/* this frame has nothing to give us for this row; return */
if (row_num >= rawheight + rawy ||
row_num < rawy)
return;
rawbpp = gimp_drawable_bpp (drawable->drawable_id);
rawwidth = gimp_drawable_width (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (line_buf)
{
g_free (line_buf);
line_buf = NULL;
}
line_buf = g_malloc (rawwidth * rawbpp);
/* Initialise and fetch the raw new frame row */
gimp_pixel_rgn_init (&pixel_rgn,
drawable,
0, row_num - rawy,
rawwidth, 1,
FALSE,
FALSE);
gimp_pixel_rgn_get_rect (&pixel_rgn,
line_buf,
0, row_num - rawy,
rawwidth, 1);
/* render... */
srcptr = line_buf;
for (i=rawx; i<rawwidth+rawx; i++)
{
if (i>=0 && i<dest_width)
{
if ((!has_alpha) || ((*(srcptr+rawbpp-1))&128))
{
gint pi;
for (pi = 0; pi < pixelstep-1; pi++)
{
dest[i*pixelstep +pi] = *(srcptr + pi);
}
dest[i*pixelstep + pixelstep - 1] = 255;
}
}
srcptr += rawbpp;
}
}
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);
}
static void
symmetry (GimpDrawable *drawable)
{
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar output[4];
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1,
&x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in,
drawable,
x1, y1,
x2 - x1, y2 - y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out,
drawable,
x1, y1,
x2 - x1, y2 - y1,
TRUE, TRUE);
for (i = x1; i < x2; i++)
{
for (j = y1; j < y2; j++)
{
guchar pixel[4];
/* Get ONE pixel */
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel,
i, j);
/* For each layer */
for (k = 0; k < channels; k++)
{
output[k] = 255 - pixel[k];
}
gimp_pixel_rgn_set_pixel (&rgn_out,
output,
i, j);
} /*end for j*/
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - x1) / (gdouble) (x2 - x1));
} /*end for i*/
/* Update the modified region */
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 sinusrow (GimpDrawable *drawable)
{
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar *inrow;
guchar *outrow;
/* guchar output[4]; */
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1,
&x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in,
drawable,
x1, y1,
x2 - x1, y2 - y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out,
drawable,
x1, y1,
x2 - x1, y2 - y1,
TRUE, TRUE);
/* Initialise enough memory for inrow, outrow */
inrow = g_new (guchar, channels * (x2 - x1));
outrow = g_new (guchar, channels * (x2 - x1));
guchar minp[4],maxp[4];
getrange(drawable, minp, maxp, x1, x2, y1, y2);
for (i = y1; i < y2; i++)
{
/* Get row i */
gimp_pixel_rgn_get_row (&rgn_in, inrow, x1, i, x2 - x1);
for (j = x1; j < x2; j++)
{
/* For each layer, compute the average of the nine
* pixels */
for (k = 0; k < channels; k++)
{
double angle = inrow[channels * (j - x1) + k], max=255;
angle = M_2_PI * (angle / max ) ;
outrow[channels * (j - x1) + k] = (guchar)(255*(1+sin(angle))/2);
}
} /*end for j each pixel of the row*/
gimp_pixel_rgn_set_row (&rgn_out, outrow, x1, i, x2 - x1);
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - x1) / (gdouble) (x2 - x1));
} /*end for i each row*/
g_free (inrow);
g_free (outrow);
/* Update the modified region */
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
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunMode run_mode;
GimpPDBStatusType status;
GimpDrawable *drawable;
gint x1, y1, x2, y2;
INIT_I18N ();
status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Get the active drawable info */
drawable = gimp_drawable_get (param[2].data.d_drawable);
img_width = gimp_drawable_width (drawable->drawable_id);
img_height = gimp_drawable_height (drawable->drawable_id);
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
mbvals.center_x = (gdouble) (x1 + x2 - 1) / 2.0;
mbvals.center_y = (gdouble) (y1 + y2 - 1) / 2.0;
/* Set the tile cache size */
gimp_tile_cache_ntiles (2 * drawable->ntile_cols);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &mbvals);
/* Get information from the dialog */
if (! mblur_dialog (param[1].data.d_image, drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
if (strcmp (name, PLUG_IN_PROC_INWARD) == 0)
mbvals.blur_outward = FALSE;
if (nparams == 8)
{
mbvals.center_x = param[6].data.d_float;
mbvals.center_y = param[7].data.d_float;
}
else if (nparams != 6)
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
mbvals.mblur_type = param[3].data.d_int32;
mbvals.length = param[4].data.d_int32;
mbvals.angle = param[5].data.d_int32;
}
if ((mbvals.mblur_type < 0) || (mbvals.mblur_type > MBLUR_MAX))
status= GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &mbvals);
break;
default:
break;
}
/* Blur the image */
if ((status == GIMP_PDB_SUCCESS) &&
(gimp_drawable_is_rgb(drawable->drawable_id) ||
gimp_drawable_is_gray(drawable->drawable_id)))
{
/* Run! */
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
mblur (drawable, NULL);
/* If run mode is interactive, flush displays */
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &mbvals, sizeof (mblur_vals_t));
}
else if (status == GIMP_PDB_SUCCESS)
status = GIMP_PDB_EXECUTION_ERROR;
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
void
precompute_normals (gint x1,
gint x2,
gint y)
{
GimpVector3 *tmpv, p1, p2, p3, normal;
gdouble *tmpd;
gint n, i, nv;
guchar *map = NULL;
gint bpp = 1;
guchar mapval;
/* First, compute the heights */
/* ========================== */
tmpv = triangle_normals[0];
triangle_normals[0] = triangle_normals[1];
triangle_normals[1] = tmpv;
tmpv = vertex_normals[0];
vertex_normals[0] = vertex_normals[1];
vertex_normals[1] = vertex_normals[2];
vertex_normals[2] = tmpv;
tmpd = heights[0];
heights[0] = heights[1];
heights[1] = heights[2];
heights[2] = tmpd;
if (mapvals.bumpmap_id != -1)
{
bpp = gimp_drawable_bpp(mapvals.bumpmap_id);
}
gimp_pixel_rgn_get_row (&bump_region, bumprow, x1, y, x2 - x1);
if (mapvals.bumpmaptype > 0)
{
switch (mapvals.bumpmaptype)
{
case 1:
map = logmap;
break;
case 2:
map = sinemap;
break;
default:
map = spheremap;
break;
}
for (n = 0; n < (x2 - x1); n++)
{
if (bpp>1)
{
mapval = (guchar)((float)((bumprow[n * bpp] +bumprow[n * bpp +1] + bumprow[n * bpp + 2])/3.0 )) ;
}
else
{
mapval = bumprow[n * bpp];
}
heights[2][n] = (gdouble) mapvals.bumpmax * (gdouble) map[mapval] / 255.0;
}
}
else
{
for (n = 0; n < (x2 - x1); n++)
{
if (bpp>1)
{
mapval = (guchar)((float)((bumprow[n * bpp] +bumprow[n * bpp +1] + bumprow[n * bpp + 2])/3.0 )) ;
}
else
{
mapval = bumprow[n * bpp];
}
heights[2][n] = (gdouble) mapvals.bumpmax * (gdouble) mapval / 255.0;
}
}
/* Compute triangle normals */
/* ======================== */
i = 0;
for (n = 0; n < (x2 - x1 - 1); n++)
{
p1.x = 0.0;
p1.y = ystep;
p1.z = heights[2][n] - heights[1][n];
p2.x = xstep;
p2.y = ystep;
p2.z = heights[2][n+1] - heights[1][n];
p3.x = xstep;
p3.y = 0.0;
p3.z = heights[1][n+1] - heights[1][n];
triangle_normals[1][i] = gimp_vector3_cross_product (&p2, &p1);
triangle_normals[1][i+1] = gimp_vector3_cross_product (&p3, &p2);
gimp_vector3_normalize (&triangle_normals[1][i]);
gimp_vector3_normalize (&triangle_normals[1][i+1]);
i += 2;
}
/* Compute vertex normals */
/* ====================== */
i = 0;
gimp_vector3_set (&normal, 0.0, 0.0, 0.0);
for (n = 0; n < (x2 - x1 - 1); n++)
{
nv = 0;
if (n > 0)
{
if (y > 0)
{
gimp_vector3_add (&normal, &normal, &triangle_normals[0][i-1]);
gimp_vector3_add (&normal, &normal, &triangle_normals[0][i-2]);
nv += 2;
}
if (y < pre_h)
{
gimp_vector3_add (&normal, &normal, &triangle_normals[1][i-1]);
nv++;
}
}
if (n <pre_w)
{
if (y > 0)
{
gimp_vector3_add (&normal, &normal, &triangle_normals[0][i]);
gimp_vector3_add (&normal, &normal, &triangle_normals[0][i+1]);
nv += 2;
}
if (y < pre_h)
{
gimp_vector3_add (&normal, &normal, &triangle_normals[1][i]);
gimp_vector3_add (&normal, &normal, &triangle_normals[1][i+1]);
nv += 2;
}
}
gimp_vector3_mul (&normal, 1.0 / (gdouble) nv);
gimp_vector3_normalize (&normal);
vertex_normals[1][n] = normal;
i += 2;
}
}
static void
brushdmenuselect (GtkWidget *widget,
gpointer data)
{
GimpPixelRgn src_rgn;
guchar *src_row;
guchar *src;
gint id;
gint bpp;
gint x, y;
ppm_t *p;
gint x1, y1, x2, y2;
gint row;
GimpDrawable *drawable;
gint rowstride;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &id);
if (id == -1)
return;
if (brush_from_file == 2)
return; /* Not finished GUI-building yet */
if (brush_from_file)
{
#if 0
unselectall (brush_list);
#endif
preset_save_button_set_sensitive (FALSE);
}
gtk_adjustment_set_value (brush_gamma_adjust, 1.0);
gtk_adjustment_set_value (brush_aspect_adjust, 0.0);
drawable = gimp_drawable_get (id);
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
bpp = gimp_drawable_bpp (drawable->drawable_id);
ppm_kill (&brushppm);
ppm_new (&brushppm, x2 - x1, y2 - y1);
p = &brushppm;
rowstride = p->width * 3;
src_row = g_new (guchar, (x2 - x1) * bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
0, 0, x2 - x1, y2 - y1,
FALSE, FALSE);
if (bpp == 3)
{ /* RGB */
int bpr = (x2 - x1) * 3;
for (row = 0, y = y1; y < y2; row++, y++)
{
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
memcpy (p->col + row*rowstride, src_row, bpr);
}
}
else
{ /* RGBA (bpp > 3) GrayA (bpp == 2) or Gray */
gboolean is_gray = ((bpp > 3) ? TRUE : FALSE);
for (row = 0, y = y1; y < y2; row++, y++)
{
guchar *tmprow = p->col + row * rowstride;
guchar *tmprow_ptr;
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
src = src_row;
tmprow_ptr = tmprow;
/* Possible micro-optimization here:
* src_end = src + src_rgn.bpp * (x2-x1);
* for ( ; src < src_end ; src += src_rgn.bpp)
*/
for (x = x1; x < x2; x++)
{
*(tmprow_ptr++) = src[0];
*(tmprow_ptr++) = src[is_gray ? 1 : 0];
*(tmprow_ptr++) = src[is_gray ? 2 : 0];
src += src_rgn.bpp;
}
}
}
g_free (src_row);
if (bpp >= 3)
pcvals.color_brushes = 1;
else
pcvals.color_brushes = 0;
brush_from_file = 0;
update_brush_preview (NULL);
}
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
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));
}
// Run the plugin
static void
run (const gchar *name, gint nparams, const GimpParam *param, gint *nreturn_vals, GimpParam **return_vals)
{
// Return values
static GimpParam values[1];
gint sel_x1, sel_y1, sel_x2, sel_y2, w, h, padding;
PluginData pd;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
*nreturn_vals = 1;
*return_vals = values;
if (param[0].type!= GIMP_PDB_INT32)
status=GIMP_PDB_CALLING_ERROR;
if (param[2].type!=GIMP_PDB_DRAWABLE)
status=GIMP_PDB_CALLING_ERROR;
run_mode = (GimpRunMode) param[0].data.d_int32;
pd.drawable = gimp_drawable_get(param[2].data.d_drawable);
gimp_drawable_mask_bounds(pd.drawable->drawable_id, &sel_x1, &sel_y1, &sel_x2, &sel_y2);
pd.selection_width = sel_x2 - sel_x1;
pd.selection_height = sel_y2 - sel_y1;
pd.selection_offset_x = sel_x1;
pd.selection_offset_y = sel_y1;
pd.image_width = gimp_drawable_width(pd.drawable->drawable_id);
pd.image_height = gimp_drawable_height(pd.drawable->drawable_id);
pd.channel_count = gimp_drawable_bpp(pd.drawable->drawable_id);
pd.point_grabbed = -1;
if (run_mode == GIMP_RUN_INTERACTIVE)
{
// Interactive call with dialog
dialog(&pd);
if (pd.curve_user.count > 0)
{
gimp_set_data (PLUG_IN_BINARY, pd.curve_user.user_points, sizeof (GdkPoint) * pd.curve_user.count);
}
}
else if (run_mode == GIMP_RUN_WITH_LAST_VALS)
{
// Read a saved curve and apply it
fft_prepare(&pd);
gimp_get_data(PLUG_IN_BINARY, pd.curve_user.user_points);
pd.curve_user.count = gimp_get_data_size(PLUG_IN_BINARY) / sizeof (GdkPoint);
gimp_pixel_rgn_init(&pd.region, pd.drawable, 0, 0, pd.image_width, pd.image_height, TRUE, TRUE);
fft_apply(&pd);
gimp_pixel_rgn_set_rect(&pd.region, pd.img_pixels, 0, 0, pd.image_width, pd.image_height);
gimp_drawable_flush(pd.drawable);
gimp_drawable_merge_shadow(pd.drawable->drawable_id, TRUE);
gimp_drawable_update(pd.drawable->drawable_id, pd.selection_offset_x, pd.selection_offset_y, pd.selection_width, pd.selection_height);
fft_destroy(&pd);
gimp_displays_flush();
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
gimp_drawable_detach(pd.drawable);
}
static void
blur (GimpDrawable *drawable)
{
gint i, ii, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar **row;
guchar *outrow;
gint width, height;
gimp_progress_init ("My Blur...");
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1,
&x2, &y2);
width = x2 - x1;
height = y2 - y1;
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Allocate a big enough tile cache */
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in,
drawable,
x1, y1,
width, height,
FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out,
drawable,
x1, y1,
width, height,
TRUE, TRUE);
/* Allocate memory for input and output tile rows */
init_mem (&row, &outrow, width * channels);
for (ii = -radius; ii <= radius; ii++)
{
gimp_pixel_rgn_get_row (&rgn_in,
row[radius + ii],
x1, y1 + CLAMP (ii, 0, height - 1),
width);
}
for (i = 0; i < height; i++)
{
/* To be done for each tile row */
process_row (row,
outrow,
x1, y1,
width, height,
channels,
i);
gimp_pixel_rgn_set_row (&rgn_out,
outrow,
x1, i + y1,
width);
/* shift tile rows to insert the new one at the end */
shuffle (&rgn_in,
row,
x1, y1,
width, height,
i);
if (i % 10 == 0)
gimp_progress_update ((gdouble) i / (gdouble) height);
}
/* We could also put that in a separate function but it's
* rather simple */
for (ii = 0; ii < 2 * radius + 1; ii++)
g_free (row[ii]);
g_free (row);
g_free (outrow);
/* Update the modified 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
exponentialrange (GimpDrawable *drawable)
{
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar output[4];
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1,
&x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in,
drawable,
x1, y1,
x2 - x1, y2 - y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out,
drawable,
x1, y1,
x2 - x1, y2 - y1,
TRUE, TRUE);
/* find the range [minp,maxp] */
guchar minp[4],maxp[4];
/* initial values are high for minp, low for maxp*/
for (j = 0; j < 4; j++){
minp[j]=255; // default for guchar 0..255
maxp[j]=0;
}
/* get the right range */
for (i = x1; i < x2; i++){
for (j = y1; j < y2; j++){
guchar pixel[4];
gimp_pixel_rgn_get_pixel (&rgn_in, pixel, i, j);
for (k = 0; k < channels; k++){
if(minp[k]>pixel[k]) minp[k]=pixel[k];
if(maxp[k]<pixel[k]) maxp[k]=pixel[k];
}
}
}
for (i = x1; i < x2; i++)
{
for (j = y1; j < y2; j++)
{
guchar pixel[4];
gimp_pixel_rgn_get_pixel (&rgn_in,
pixel, /*[4]*/
i, j);
/* For each layer, compute the exponential in the same range */
for (k = 0; k < channels; k++)
{
double ex = exp(pixel[k])- exp(minp[k]);
double ran=exp(maxp[k])-exp(minp[k]);
output[k] = (guchar)( minp[k] + (maxp[k]-minp[k]) * (ex/ran) );
}
gimp_pixel_rgn_set_pixel (&rgn_out,
output,
i, j);
} /*end for j*/
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - x1) / (gdouble) (x2 - x1));
} /*end for i*/
/* Update the modified region */
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
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
gint sel_x1, sel_y1, sel_x2, sel_y2;
gint img_height, img_width, img_bpp, img_has_alpha;
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status;
*nreturn_vals = 1;
*return_vals = values;
status = GIMP_PDB_SUCCESS;
if (param[0].type != GIMP_PDB_INT32)
status = GIMP_PDB_CALLING_ERROR;
run_mode = param[0].data.d_int32;
INIT_I18N ();
if (param[2].type != GIMP_PDB_DRAWABLE)
status = GIMP_PDB_CALLING_ERROR;
drawable = gimp_drawable_get (param[2].data.d_drawable);
img_width = gimp_drawable_width (drawable->drawable_id);
img_height = gimp_drawable_height (drawable->drawable_id);
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
img_has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
gimp_drawable_mask_bounds (drawable->drawable_id,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
if (!gimp_drawable_is_rgb (drawable->drawable_id))
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
gr = g_rand_new ();
memset (&qbist_info, 0, sizeof (qbist_info));
create_info (&qbist_info.info);
qbist_info.oversampling = 4;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &qbist_info);
/* Get information from the dialog */
if (dialog_run ())
{
status = GIMP_PDB_SUCCESS;
gimp_set_data (PLUG_IN_PROC, &qbist_info, sizeof (QbistInfo));
}
else
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &qbist_info);
status = GIMP_PDB_SUCCESS;
break;
default:
status = GIMP_PDB_CALLING_ERROR;
break;
}
if (status == GIMP_PDB_SUCCESS)
{
GimpPixelRgn imagePR;
gpointer pr;
gimp_tile_cache_ntiles ((drawable->width + gimp_tile_width () - 1) /
gimp_tile_width ());
gimp_pixel_rgn_init (&imagePR, drawable,
0, 0, img_width, img_height, TRUE, TRUE);
optimize (&qbist_info.info);
gimp_progress_init (_("Qbist"));
for (pr = gimp_pixel_rgns_register (1, &imagePR);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
gint row;
for (row = 0; row < imagePR.h; row++)
{
qbist (&qbist_info.info,
imagePR.data + row * imagePR.rowstride,
imagePR.x,
imagePR.y + row,
imagePR.w,
sel_x2 - sel_x1,
sel_y2 - sel_y1,
imagePR.bpp,
qbist_info.oversampling);
}
gimp_progress_update ((gfloat) (imagePR.y - sel_y1) /
(gfloat) (sel_y2 - sel_y1));
}
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
sel_x1, sel_y1,
(sel_x2 - sel_x1), (sel_y2 - sel_y1));
gimp_displays_flush ();
}
g_rand_free (gr);
}
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
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
nova (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn;
GimpPixelRgn dest_rgn;
gpointer pr;
guchar *src_row, *dest_row, *save_src;
guchar *src, *dest;
gint x1, y1, x2, y2, x, y;
gint row, col;
gint alpha, bpp;
gint progress, max_progress;
gboolean has_alpha;
gint xc, yc; /* center of nova */
gdouble u, v, l, w, w1, c, t;
gdouble *spoke;
gdouble nova_alpha, src_alpha, new_alpha = 0.0;
gdouble compl_ratio, ratio;
GimpRGB color;
GimpRGB *spokecolor;
GimpHSV hsv;
gdouble spokecol;
gint i;
GRand *gr;
guchar *cache = NULL;
gint width, height;
gdouble zoom = 0.0;
gr = g_rand_new ();
/* initialize */
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
spoke = g_new (gdouble, pvals.nspoke);
spokecolor = g_new (GimpRGB, pvals.nspoke);
gimp_rgb_set_alpha (&pvals.color, 1.0);
gimp_rgb_to_hsv (&pvals.color, &hsv);
for (i = 0; i < pvals.nspoke; i++)
{
spoke[i] = gauss (gr);
hsv.h += ((gdouble) pvals.randomhue / 360.0) *
g_rand_double_range (gr, -0.5, 0.5);
if (hsv.h < 0)
hsv.h += 1.0;
else if (hsv.h >= 1.0)
hsv.h -= 1.0;
gimp_hsv_to_rgb (&hsv, spokecolor + i);
}
if (preview)
{
cache = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
&width, &height, &bpp);
zoom = gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview));
gimp_preview_transform (preview,
pvals.xcenter, pvals.ycenter, &xc, &yc);
x1 = 0;
y1 = 0;
x2 = width;
y2 = height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
bpp = gimp_drawable_bpp (drawable->drawable_id);
xc = pvals.xcenter;
yc = pvals.ycenter;
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);
}
alpha = (has_alpha) ? bpp - 1 : bpp;
/* Initialize progress */
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
if (preview)
{
save_src = src_row = g_new (guchar, y2 * width * bpp);
memcpy (src_row, cache, y2 * width * bpp);
dest_row = g_new (guchar, y2 * width * bpp);
dest = dest_row;
src = src_row;
for (row = 0, y = 0; row < y2; row++, y++)
{
for (col = 0, x = 0; col < x2; col++, x++)
{
u = ((gdouble) (x - xc) /
((gdouble) pvals.radius * width /
drawable->width * zoom));
v = ((gdouble) (y - yc) /
((gdouble) pvals.radius * height /
drawable->height * zoom));
l = sqrt (SQR (u) + SQR (v));
/* This algorithm is still under construction. */
t = (atan2 (u, v) / (2 * G_PI) + .51) * pvals.nspoke;
i = (gint) floor (t);
t -= i;
i %= pvals.nspoke;
w1 = spoke[i] * (1 - t) + spoke[(i + 1) % pvals.nspoke] * t;
w1 = w1 * w1;
w = 1.0 / (l + 0.001) * 0.9;
nova_alpha = CLAMP (w, 0.0, 1.0);
if (has_alpha)
{
src_alpha = (gdouble) src[alpha] / 255.0;
new_alpha = src_alpha + (1.0 - src_alpha) * nova_alpha;
if (new_alpha != 0.0)
ratio = nova_alpha / new_alpha;
else
ratio = 0.0;
}
else
ratio = nova_alpha;
compl_ratio = 1.0 - ratio;
/* red or gray */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
if (bpp>2)
{
/* green */
spokecol = (gdouble)spokecolor[i ].g * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].g * t;
if (w>1.0)
color.g = CLAMP (spokecol * w, 0.0, 1.0);
else
color.g = src[1]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.g += c;
dest[1] = CLAMP (color.g*255.0, 0, 255);
/* blue */
spokecol = (gdouble)spokecolor[i ].b * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].b * t;
if (w>1.0)
color.b = CLAMP (spokecol * w, 0.0, 1.0);
else
color.b = src[2]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.b += c;
dest[2] = CLAMP (color.b*255.0, 0, 255);
}
/* alpha */
if (has_alpha)
dest[alpha] = new_alpha * 255.0;
src += bpp;
dest += bpp;
}
}
gimp_preview_draw_buffer (preview, dest_row, bpp * width);
g_free (cache);
g_free (save_src);
g_free (dest_row);
}
else
{ /* normal mode */
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL ;
pr = gimp_pixel_rgns_process (pr))
{
src_row = src_rgn.data;
dest_row = dest_rgn.data;
for (row = 0, y = src_rgn.y; row < src_rgn.h; row++, y++)
{
src = src_row;
dest = dest_row;
for (col = 0, x = src_rgn.x; col < src_rgn.w; col++, x++)
{
u = (gdouble) (x-xc) / pvals.radius;
v = (gdouble) (y-yc) / pvals.radius;
l = sqrt(u*u + v*v);
/* This algorithm is still under construction. */
t = (atan2 (u, v) / (2 * G_PI) + .51) * pvals.nspoke;
i = (gint) floor (t);
t -= i;
i %= pvals.nspoke;
w1 = spoke[i] * (1 - t) + spoke[(i + 1) % pvals.nspoke] * t;
w1 = w1 * w1;
w = 1/(l+0.001)*0.9;
nova_alpha = CLAMP (w, 0.0, 1.0);
if (has_alpha)
{
src_alpha = (gdouble) src[alpha] / 255.0;
new_alpha = src_alpha + (1.0 - src_alpha) * nova_alpha;
if (new_alpha != 0.0)
ratio = nova_alpha / new_alpha;
else
ratio = 0.0;
}
else
ratio = nova_alpha;
compl_ratio = 1.0 - ratio;
switch (bpp)
{
case 1:
case 2:
/* gray */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
break;
case 3:
case 4:
/* red */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
/* green */
spokecol = (gdouble)spokecolor[i ].g * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].g * t;
if (w>1.0)
color.g = CLAMP (spokecol * w, 0.0, 1.0);
else
color.g = src[1]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.g += c;
dest[1] = CLAMP (color.g*255.0, 0, 255);
/* blue */
spokecol = (gdouble)spokecolor[i ].b * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].b * t;
if (w>1.0)
color.b = CLAMP (spokecol * w, 0.0, 1.0);
else
color.b = src[2]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.b += c;
dest[2] = CLAMP (color.b*255.0, 0, 255);
break;
}
if (has_alpha)
dest[alpha] = new_alpha * 255.0;
src += src_rgn.bpp;
dest += dest_rgn.bpp;
}
src_row += src_rgn.rowstride;
dest_row += dest_rgn.rowstride;
}
/* Update progress */
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
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, (x2 - x1), (y2 - y1));
}
g_free (spoke);
g_free (spokecolor);
g_rand_free (gr);
}
/*
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);
}
}
gint
guess_new_size (GtkWidget * button, PreviewData * p_data, GuessDir direction)
{
gint32 disc_layer_ID;
GimpDrawable *drawable;
gint z1, z2, k;
gint z1min, z1max, z2max;
gint width, height;
gint lw, lh;
gint x_off, y_off;
gint bpp, c_bpp;
GimpPixelRgn rgn_in;
guchar *line;
gboolean has_alpha;
gdouble sum;
gint mask_size;
gint max_mask_size = 0;
gint old_size;
gint new_size;
disc_layer_ID = p_data->vals->disc_layer_ID;
switch (direction)
{
case GUESS_DIR_HOR:
old_size = p_data->old_width;
break;
case GUESS_DIR_VERT:
old_size = p_data->old_height;
break;
default:
g_message("You just found a bug");
return 0;
}
LAYER_CHECK_ACTION(disc_layer_ID, gtk_dialog_response (GTK_DIALOG (dlg), RESPONSE_REFRESH), old_size);
width = gimp_drawable_width (disc_layer_ID);
height = gimp_drawable_height (disc_layer_ID);
has_alpha = gimp_drawable_has_alpha (disc_layer_ID);
bpp = gimp_drawable_bpp (disc_layer_ID);
c_bpp = bpp - (has_alpha ? 1 : 0);
drawable = gimp_drawable_get (disc_layer_ID);
gimp_pixel_rgn_init (&rgn_in, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_drawable_offsets (disc_layer_ID, &x_off, &y_off);
x_off -= p_data->x_off;
y_off -= p_data->y_off;
lw = (MIN (p_data->old_width, width + x_off) - MAX (0, x_off));
lh = (MIN (p_data->old_height, height + y_off) - MAX (0, y_off));
switch (direction)
{
case GUESS_DIR_HOR:
z1min = MAX (0, y_off);
z1max = MIN (p_data->old_height, height + y_off);
z2max = lw;
break;
case GUESS_DIR_VERT:
z1min = MAX (0, x_off);
z1max = MIN (p_data->old_width, width + x_off);
z2max = lh;
break;
default:
g_message("You just found a bug");
return 0;
}
line = g_try_new (guchar, bpp * z2max);
for (z1 = z1min; z1 < z1max; z1++)
{
switch (direction)
{
case GUESS_DIR_HOR:
gimp_pixel_rgn_get_row (&rgn_in, line, MAX (0, -x_off), z1 - y_off, z2max);
break;
case GUESS_DIR_VERT:
gimp_pixel_rgn_get_col (&rgn_in, line, z1 - x_off, MAX (0, -y_off), z2max);
break;
}
mask_size = 0;
for (z2 = 0; z2 < z2max; z2++)
{
sum = 0;
for (k = 0; k < c_bpp; k++)
{
sum += line[bpp * z2 + k];
}
sum /= (255 * c_bpp);
if (has_alpha)
{
sum *= (gdouble) line[bpp * (z2 + 1) - 1] / 255;
}
if (sum >= (0.5 / c_bpp))
{
mask_size++;
}
}
if (mask_size > max_mask_size)
{
max_mask_size = mask_size;
}
}
new_size = old_size - max_mask_size;
g_free (line);
gimp_drawable_detach (drawable);
return new_size;
}
