Hello,
I have a problem creating a cery simple gimp plugin..
The idea is to select a part of an image, and the plugin should create
a new image with the size of the selection, and put (processed) pixels
in that new image (a bit like "Copy && Past As New").
The plugin compiles, runs without crashing, the progress bar is ok,
but I do not see the new image anywhere.
I must be doing something *obvious* wrong somewhere...
void
render (gint32 image_ID,
GimpDrawable *src_drawable,
PlugInVals *vals,
PlugInImageVals *image_vals,
PlugInDrawableVals *drawable_vals)
{
gint progress, max_progress;
gint x1, y1, x2, y2;
gint x, y, width, height;
GimpPixelRgn src_rgn, msk_rgn, dst_rgn;
gint rgn_stride, msk_stride, dst_stride;
gint rgn_bpp, msk_bpp, dst_bpp;
guchar *rgn_buf, *msk_buf, *dst_buf;
guchar **src, **msk, **dst;
gint32 selection_ID;
GimpDrawable* msk_drawable;
gint32 dst_image;
gint32 dst_layer;
GimpDrawable* dst_drawable;
/* Get selection */
selection_ID = gimp_image_get_selection (image_ID);
/* Get selection area */
gimp_drawable_mask_bounds (src_drawable->drawable_id, &x1, &y1, &x2, &y2);
rgn_bpp = gimp_drawable_bpp (src_drawable->drawable_id);
width = (x2 - x1);
height = (y2 - y1);
/* Get selection mask */
msk_drawable = gimp_drawable_get (selection_ID);
msk_bpp = gimp_drawable_bpp (msk_drawable->drawable_id);
/* create new image */
dst_image = gimp_image_new(width, height, GIMP_RGB);
gimp_image_undo_disable(dst_image);
dst_layer = gimp_layer_new(dst_image, "Histogram", width, height,
GIMP_RGB_IMAGE, 100,
GIMP_NORMAL_MODE);
gimp_image_add_layer(dst_image, dst_layer, 0);
dst_drawable = gimp_drawable_get(dst_layer);
dst_bpp = gimp_drawable_bpp (dst_drawable->drawable_id);
/* Initialize progress */
progress = 0;
max_progress = width * height;
/* substitute pixel vales */
gimp_pixel_rgn_init (&src_rgn, src_drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&msk_rgn, msk_drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dst_rgn, dst_drawable,
0, 0, width, height, FALSE, FALSE);
rgn_buf = g_new0 (guchar, width * height * rgn_bpp);
msk_buf = g_new0 (guchar, width * height * msk_bpp);
dst_buf = g_new0 (guchar, width * height * dst_bpp);
gimp_progress_init (_("Histogram"));
gimp_pixel_rgn_get_rect(&src_rgn, rgn_buf, x1, y1, width, height);
gimp_pixel_rgn_get_rect(&msk_rgn, msk_buf, x1, y1, width, height);
gimp_pixel_rgn_get_rect(&dst_rgn, dst_buf, 0, 0, width, height);
rgn_stride = width * rgn_bpp;
msk_stride = width * msk_bpp;
dst_stride = width * dst_bpp;
src = g_new (guchar*, height);
dst = g_new (guchar*, height);
msk = g_new (guchar*, height);
for(y = 0; y < height; y++) {
src[y] = &rgn_buf[y * rgn_stride];
dst[y] = &dst_buf[y * dst_stride];
msk[y] = &msk_buf[y * msk_stride];
}
/* here goes the processing */
for (y = 1; y < height-1; y++)
{
for (x = 0; x < width-1; x++)
{
if (msk[y][x]!=0) {
dst[y][x] = src[y][x];
}
}
/* Update progress */
progress += width;
gimp_progress_update ((double) progress / (double) max_progress);
}
gimp_progress_update (1.0);
/* update the region */
gimp_drawable_flush (dst_drawable);
gimp_drawable_detach(dst_drawable);
//gimp_pixel_rgn_set_rect(&dst_rgn, dst_buf, 0, 0, width, height);
g_free(src);
g_free(dst);
g_free(msk);
g_free(rgn_buf);
g_free(dst_buf);
g_free(msk_buf);
}
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