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- /* Tiler v0.31
- * 22 May 1997
- * Tim Rowley <tor@cs.brown.edu>
- */
-
- /* TODO:
- * + better basis function
- * + optimize
- */
-
- /* History:
- * v0.1: initial version
- * v0.2: fix edge conditions
- * v0.3: port to 0.99 API
- * v0.31: small bugfix
- */
-
- #include "config.h"
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- #include <libgimp/gimp.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- /* Declare local functions.
- */
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
-
- static void tile (GimpDrawable *drawable);
- static gint scale (gint width,
- gint height,
- gint x,
- gint y,
- gint data);
-
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- MAIN ()
-
- static void
- query (void)
- {
- static GimpParamDef args[] =
- {
- { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
- { GIMP_PDB_IMAGE, "image", "Input image (unused)" },
- { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" }
- };
- static gint nargs = sizeof (args) / sizeof (args[0]);
-
- gimp_install_procedure ("plug_in_make_seamless",
- "Seamless tile creation",
- "This plugin creates a seamless tileable from the input image",
- "Tim Rowley",
- "Tim Rowley",
- "1997",
- N_("<Image>/Filters/Map/Make Seamless"),
- "RGB*, GRAY*",
- GIMP_PLUGIN,
- nargs, 0,
- args, NULL);
- }
-
-
- static void
- run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals)
- {
- static GimpParam values[1];
- GimpDrawable *drawable;
- GimpRunModeType run_mode;
- GimpPDBStatusType status = GIMP_PDB_SUCCESS;
-
- run_mode = param[0].data.d_int32;
-
- INIT_I18N();
-
- /* Get the specified drawable */
- drawable = gimp_drawable_get (param[2].data.d_drawable);
-
- /* Make sure that the drawable is gray or RGB color */
- if (gimp_drawable_is_rgb (drawable->id) ||
- gimp_drawable_is_gray (drawable->id))
- {
- gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
- tile(drawable);
-
- if (run_mode != GIMP_RUN_NONINTERACTIVE)
- gimp_displays_flush ();
- }
- else
- {
- /* gimp_message ("laplace: cannot operate on indexed color images"); */
- status = GIMP_PDB_EXECUTION_ERROR;
- }
-
- *nreturn_vals = 1;
- *return_vals = values;
-
- values[0].type = GIMP_PDB_STATUS;
- values[0].data.d_status = status;
-
- gimp_drawable_detach (drawable);
- }
-
-
- static gint
- scale (gint width,
- gint height,
- gint x,
- gint y,
- gint data)
- {
- gint A = width/2-1;
- gint B = height/2-1;
- gint a, b;
-
- if (x<width/2)
- a = width/2-x-1;
- else if ((x==width/2) && (width&1))
- return data;
- else
- a = x-width/2-(width&1);
-
- if (y<height/2)
- b = height/2-y-1;
- else if ((y==height/2) && (height&1))
- return data;
- else
- b = y-height/2-(height&1);
-
- if ((B*a<A*b) || ((B*a==A*b) && (a&1)))
- {
- a = A-a;
- b = B-b;
- if (a==A)
- return data;
- else
- return data-((data*(A*B-a*B))/(A*b+A*B-a*B));
- }
- else
- {
- if (a==A)
- return 0;
- else
- return (data*(A*B-a*B))/(A*b+A*B-a*B);
- }
- }
-
-
- static void
- tile (GimpDrawable *drawable)
- {
- glong width, height;
- glong bytes;
- glong val;
- gint wodd, hodd;
- GimpPixelRgn srcPR, destPR;
- gint x1, y1, x2, y2;
- gint row, col, x, y, c;
- guchar *cur_row, *dest_cur, *dest_top, *dest_bot;
-
- /* Get the input */
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
- gimp_progress_init (_("Tiler..."));
-
- width = drawable->width;
- height = drawable->height;
- bytes = drawable->bpp;
-
- /* allocate row buffers */
- cur_row = g_new (guchar, (x2 - x1) * bytes);
- dest_cur = g_new (guchar, (x2 - x1) * bytes);
- dest_top = g_new (guchar, (x2 - x1) * bytes);
- dest_bot = g_new (guchar, (x2 - x1) * bytes);
-
- gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
- gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
-
- y = y2-y1;
- x = x2-x1;
-
- wodd = x&1;
- hodd = y&1;
-
- for (row = 0; row <y; row++)
- {
- gimp_pixel_rgn_get_row (&destPR, dest_cur, x1, y1+row, (x2-x1));
- memset (dest_cur, 0, x*bytes);
- gimp_pixel_rgn_set_row (&destPR, dest_cur, x1, y1+row, (x2-x1));
- }
-
- for (row = 0; row < y; row++)
- {
- gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, y1+row, (x2-x1));
- gimp_pixel_rgn_get_row (&destPR, dest_cur, x1, y1+row, (x2-x1));
- if (row >= y/2+hodd)
- gimp_pixel_rgn_get_row (&destPR, dest_top,
- x1, y1+(row-y/2-hodd), (x2-x1));
- if (row < y/2)
- gimp_pixel_rgn_get_row (&destPR, dest_bot,
- x1, y1+(row+y/2+hodd), (x2-x1));
-
- for (col = 0; col < x; col++)
- {
- for (c=0; c<bytes; c++)
- {
- val = scale (x, y, col, row, cur_row[col*bytes+c]);
-
- /* Main image */
- dest_cur[col*bytes+c] += val;
- /* top left */
- if ((col>=x/2+wodd) && (row>=y/2+hodd))
- dest_top[(col-x/2-wodd)*bytes+c] += val;
- /* top right */
- if ((col<x/2) && (row>=y/2+hodd))
- dest_top[(x/2+col+wodd)*bytes+c] += val;
- /* bottom left */
- if ((col>=x/2+wodd) && (row<y/2))
- dest_bot[(col-x/2-wodd)*bytes+c] += val;
- /* bottom right */
- if ((col<x/2) && (row<y/2))
- dest_bot[(col+x/2+wodd)*bytes+c] += val;
- }
- }
-
- gimp_pixel_rgn_set_row (&destPR, dest_cur, x1, y1+row, (x2-x1));
- if (row >= y/2+hodd)
- gimp_pixel_rgn_set_row (&destPR, dest_top,
- x1, y1+(row-y/2-hodd), (x2-x1));
- if (row < y/2)
- gimp_pixel_rgn_set_row (&destPR, dest_bot,
- x1, y1+(row+y/2+hodd), (x2-x1));
-
- if ((row % 5) == 0)
- gimp_progress_update ((gdouble) row / (gdouble) (y2 - y1));
- }
-
- gimp_drawable_flush (drawable);
- gimp_drawable_merge_shadow (drawable->id, TRUE);
- gimp_drawable_update (drawable->id, x1, y1, (x2-x1), (y2-y1));
- }
-