/* The GIMP -- an image manipulation program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * Whirl and Pinch plug-in --- two common distortions in one place * Copyright (C) 1997 Federico Mena Quintero * federico@nuclecu.unam.mx * Copyright (C) 1997 Scott Goehring * scott@poverty.bloomington.in.us * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Version 2.09: * * - Another cool patch from Scott. The radius is now in [0.0, 2.0], * with 1.0 being the default as usual. In addition to a minimal * speed-up (one multiplication is eliminated in the calculation * code), it is easier to think of nice round values instead of * sqrt(2) :-) * * - Modified the way out-of-range pixels are handled. This time the * plug-in handles `outside' pixels better; it paints them with the * current background color (for images without transparency) or with * a completely transparent background color (for images with * transparency). */ /* Version 2.08: * * This is the first version of this plug-in. It is called 2.08 * because it came out of merging the old Whirl 2.08 and Pinch 2.08 * plug-ins. */ #include "config.h" #include #include #include #ifdef HAVE_UNISTD_H #include #endif #include #include #include #define PLUG_IN_NAME "plug_in_whirl_pinch" #define PLUG_IN_VERSION "May 1997, 2.09" /***** Magic numbers *****/ #define PREVIEW_SIZE 128 #define SCALE_WIDTH 200 #define ENTRY_WIDTH 60 #define CHECK_SIZE 8 #define CHECK_DARK ((int) (1.0 / 3.0 * 255)) #define CHECK_LIGHT ((int) (2.0 / 3.0 * 255)) /***** Types *****/ typedef struct { gdouble whirl; gdouble pinch; gdouble radius; } whirl_pinch_vals_t; typedef struct { GtkWidget *preview; guchar *check_row_0; guchar *check_row_1; guchar *image; guchar *dimage; gint run; } whirl_pinch_interface_t; typedef struct { gint col, row; gint img_width, img_height, img_bpp, img_has_alpha; gint tile_width, tile_height; guchar bg_color[4]; GDrawable *drawable; GTile *tile; } pixel_fetcher_t; /***** Prototypes *****/ static void query (void); static void run (char *name, int nparams, GParam *param, int *nreturn_vals, GParam **return_vals); static void whirl_pinch (void); static int calc_undistorted_coords (double wx, double wy, double whirl, double pinch, double *x, double *y); static guchar bilinear (double x, double y, guchar *values); static pixel_fetcher_t *pixel_fetcher_new (GDrawable *drawable); static void pixel_fetcher_set_bg_color (pixel_fetcher_t *pf, guchar r, guchar g, guchar b, guchar a); static void pixel_fetcher_get_pixel (pixel_fetcher_t *pf, int x, int y, guchar *pixel); static void pixel_fetcher_destroy (pixel_fetcher_t *pf); static void build_preview_source_image (void); static gint whirl_pinch_dialog (void); static void dialog_update_preview (void); static void dialog_create_value (char *title, GtkTable *table, int row, gdouble *value, double left, double right, double step); static void dialog_scale_update (GtkAdjustment *adjustment, gdouble *value); static void dialog_entry_update (GtkWidget *widget, gdouble *value); static void dialog_ok_callback (GtkWidget *widget, gpointer data); /***** Variables *****/ GPlugInInfo PLUG_IN_INFO = { NULL, /* init_proc */ NULL, /* quit_proc */ query, /* query_proc */ run /* run_proc */ }; static whirl_pinch_vals_t wpvals = { 90.0, /* whirl */ 0.0, /* pinch */ 1.0 /* radius */ }; static whirl_pinch_interface_t wpint = { NULL, /* preview */ NULL, /* check_row_0 */ NULL, /* check_row_1 */ NULL, /* image */ NULL, /* dimage */ FALSE /* run */ }; static GDrawable *drawable; static gint img_width, img_height, img_bpp, img_has_alpha; static gint sel_x1, sel_y1, sel_x2, sel_y2; static gint sel_width, sel_height; static gint preview_width, preview_height; static double cen_x, cen_y; static double scale_x, scale_y; static double radius, radius2; /***** Functions *****/ MAIN() static void query (void) { static GParamDef args[] = { { PARAM_INT32, "run_mode", "Interactive, non-interactive" }, { PARAM_IMAGE, "image", "Input image" }, { PARAM_DRAWABLE, "drawable", "Input drawable" }, { PARAM_FLOAT, "whirl", "Whirl angle (degrees)" }, { PARAM_FLOAT, "pinch", "Pinch amount" }, { PARAM_FLOAT, "radius", "Radius (1.0 is the largest circle that fits in the image, " "and 2.0 goes all the way to the corners)" } }; /* args */ static GParamDef *return_vals = NULL; static int nargs = sizeof(args) / sizeof(args[0]); static int nreturn_vals = 0; gimp_install_procedure (PLUG_IN_NAME, "Distort an image by whirling and pinching", "Distorts the image by whirling and pinching, which are two common " "center-based, circular distortions. Whirling is like projecting " "the image onto the surface of water in a toilet and flushing. " "Pinching is similar to projecting the image onto an elastic surface " "and pressing or pulling on the center of the surface.", "Federico Mena Quintero and Scott Goehring", "Federico Mena Quintero and Scott Goehring", PLUG_IN_VERSION, "/Filters/Distorts/Whirl and Pinch...", "RGB*, GRAY*", PROC_PLUG_IN, nargs, nreturn_vals, args, return_vals); } static void run (char *name, int nparams, GParam *param, int *nreturn_vals, GParam **return_vals) { static GParam values[1]; GRunModeType run_mode; GStatusType status; double xhsiz, yhsiz; int pwidth, pheight; status = STATUS_SUCCESS; run_mode = param[0].data.d_int32; values[0].type = PARAM_STATUS; values[0].data.d_status = status; *nreturn_vals = 1; *return_vals = values; /* Get the active drawable info */ drawable = gimp_drawable_get (param[2].data.d_drawable); img_width = gimp_drawable_width(drawable->id); img_height = gimp_drawable_height(drawable->id); img_bpp = gimp_drawable_bpp(drawable->id); img_has_alpha = gimp_drawable_has_alpha(drawable->id); gimp_drawable_mask_bounds(drawable->id, &sel_x1, &sel_y1, &sel_x2, &sel_y2); /* Calculate scaling parameters */ sel_width = sel_x2 - sel_x1; sel_height = sel_y2 - sel_y1; cen_x = (double) (sel_x1 + sel_x2 - 1) / 2.0; cen_y = (double) (sel_y1 + sel_y2 - 1) / 2.0; xhsiz = (double) (sel_width - 1) / 2.0; yhsiz = (double) (sel_height - 1) / 2.0; if (xhsiz < yhsiz) { scale_x = yhsiz / xhsiz; scale_y = 1.0; } else if (xhsiz > yhsiz) { scale_x = 1.0; scale_y = xhsiz / yhsiz; } else { scale_x = 1.0; scale_y = 1.0; } radius = MAX(xhsiz, yhsiz); /* Calculate preview size */ if (sel_width > sel_height) { pwidth = MIN(sel_width, PREVIEW_SIZE); pheight = sel_height * pwidth / sel_width; } else { pheight = MIN(sel_height, PREVIEW_SIZE); pwidth = sel_width * pheight / sel_height; } preview_width = MAX(pwidth, 2); /* Min size is 2 */ preview_height = MAX(pheight, 2); /* See how we will run */ switch (run_mode) { case RUN_INTERACTIVE: /* Possibly retrieve data */ gimp_get_data (PLUG_IN_NAME, &wpvals); /* Get information from the dialog */ if (!whirl_pinch_dialog ()) return; break; case RUN_NONINTERACTIVE: /* Make sure all the arguments are present */ if (nparams != 6) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS) { wpvals.whirl = param[3].data.d_float; wpvals.pinch = param[4].data.d_float; wpvals.radius = param[5].data.d_float; } break; case RUN_WITH_LAST_VALS: /* Possibly retrieve data */ gimp_get_data (PLUG_IN_NAME, &wpvals); break; default: break; } /* Distort the image */ if ((status == STATUS_SUCCESS) && (gimp_drawable_is_rgb (drawable->id) || gimp_drawable_is_gray (drawable->id))) { /* Set the tile cache size */ gimp_tile_cache_ntiles (2 * (drawable->width + gimp_tile_width () - 1) / gimp_tile_width ()); /* Run! */ whirl_pinch (); /* If run mode is interactive, flush displays */ if (run_mode != RUN_NONINTERACTIVE) gimp_displays_flush (); /* Store data */ if (run_mode == RUN_INTERACTIVE) gimp_set_data (PLUG_IN_NAME, &wpvals, sizeof (whirl_pinch_vals_t)); } else if (status == STATUS_SUCCESS) status = STATUS_EXECUTION_ERROR; values[0].data.d_status = status; gimp_drawable_detach(drawable); } static void whirl_pinch (void) { GPixelRgn dest_rgn; gint progress, max_progress; guchar *top_row, *bot_row; guchar *top_p, *bot_p; gint row, col; guchar pixel[4][4]; guchar values[4]; double whirl; double cx, cy; int ix, iy; int i; guchar bg_color[4]; pixel_fetcher_t *pft, *pfb; #if 0 g_printf ("Waiting... (pid %d)\n", getpid ()); kill (getpid (), SIGSTOP); #endif /* Initialize rows */ top_row = g_malloc (img_bpp * sel_width); bot_row = g_malloc (img_bpp * sel_width); /* Initialize pixel region */ gimp_pixel_rgn_init (&dest_rgn, drawable, sel_x1, sel_y1, sel_width, sel_height, TRUE, TRUE); pft = pixel_fetcher_new (drawable); pfb = pixel_fetcher_new (drawable); gimp_palette_get_background (&bg_color[0], &bg_color[1], &bg_color[2]); pixel_fetcher_set_bg_color (pft, bg_color[0], bg_color[1], bg_color[2], (img_has_alpha ? 0 : 255)); pixel_fetcher_set_bg_color (pfb, bg_color[0], bg_color[1], bg_color[2], (img_has_alpha ? 0 : 255)); progress = 0; max_progress = sel_width * sel_height; gimp_progress_init ("Whirling and pinching..."); whirl = wpvals.whirl * G_PI / 180; radius2 = radius * radius * wpvals.radius; for (row = sel_y1; row <= ((sel_y1 + sel_y2) / 2); row++) { top_p = top_row; bot_p = bot_row + img_bpp * (sel_width - 1); for (col = sel_x1; col < sel_x2; col++) { if (calc_undistorted_coords (col, row, whirl, wpvals.pinch, &cx, &cy)) { /* We are inside the distortion area */ /* Top */ if (cx >= 0.0) ix = (int) cx; else ix = -((int) -cx + 1); if (cy >= 0.0) iy = (int) cy; else iy = -((int) -cy + 1); pixel_fetcher_get_pixel (pft, ix, iy, pixel[0]); pixel_fetcher_get_pixel (pft, ix + 1, iy, pixel[1]); pixel_fetcher_get_pixel (pft, ix, iy + 1, pixel[2]); pixel_fetcher_get_pixel (pft, ix + 1, iy + 1, pixel[3]); for (i = 0; i < img_bpp; i++) { values[0] = pixel[0][i]; values[1] = pixel[1][i]; values[2] = pixel[2][i]; values[3] = pixel[3][i]; *top_p++ = bilinear (cx, cy, values); } /* Bottom */ cx = cen_x + (cen_x - cx); cy = cen_y + (cen_y - cy); if (cx >= 0.0) ix = (int) cx; else ix = -((int) -cx + 1); if (cy >= 0.0) iy = (int) cy; else iy = -((int) -cy + 1); pixel_fetcher_get_pixel (pfb, ix, iy, pixel[0]); pixel_fetcher_get_pixel (pfb, ix + 1, iy, pixel[1]); pixel_fetcher_get_pixel (pfb, ix, iy + 1, pixel[2]); pixel_fetcher_get_pixel (pfb, ix + 1, iy + 1, pixel[3]); for (i = 0; i < img_bpp; i++) { values[0] = pixel[0][i]; values[1] = pixel[1][i]; values[2] = pixel[2][i]; values[3] = pixel[3][i]; *bot_p++ = bilinear (cx, cy, values); } bot_p -= 2 * img_bpp; /* We move backwards! */ } else { /* We are outside the distortion area; * just copy the source pixels */ /* Top */ pixel_fetcher_get_pixel (pft, col, row, pixel[0]); for (i = 0; i < img_bpp; i++) *top_p++ = pixel[0][i]; /* Bottom */ pixel_fetcher_get_pixel (pfb, (sel_x2 - 1) - (col - sel_x1), (sel_y2 - 1) - (row - sel_y1), pixel[0]); for (i = 0; i < img_bpp; i++) *bot_p++ = pixel[0][i]; bot_p -= 2 * img_bpp; /* We move backwards! */ } } /* Paint rows to image */ gimp_pixel_rgn_set_row (&dest_rgn, top_row, sel_x1, row, sel_width); gimp_pixel_rgn_set_row (&dest_rgn, bot_row, sel_x1, (sel_y2 - 1) - (row - sel_y1), sel_width); /* Update progress */ progress += sel_width * 2; gimp_progress_update ((double) progress / max_progress); } pixel_fetcher_destroy (pft); pixel_fetcher_destroy (pfb); g_free (top_row); g_free (bot_row); gimp_drawable_flush (drawable); gimp_drawable_merge_shadow (drawable->id, TRUE); gimp_drawable_update (drawable->id, sel_x1, sel_y1, sel_width, sel_height); } static int calc_undistorted_coords (double wx, double wy, double whirl, double pinch, double *x, double *y) { double dx, dy; double d, factor; double dist; double ang, sina, cosa; int inside; /* Distances to center, scaled */ dx = (wx - cen_x) * scale_x; dy = (wy - cen_y) * scale_y; /* Distance^2 to center of *circle* (scaled ellipse) */ d = dx * dx + dy * dy; /* If we are inside circle, then distort. * Else, just return the same position */ inside = (d < radius2); if (inside) { dist = sqrt(d / wpvals.radius) / radius; /* Pinch */ factor = pow (sin (G_PI_2 * dist), -pinch); dx *= factor; dy *= factor; /* Whirl */ factor = 1.0 - dist; ang = whirl * factor * factor; sina = sin (ang); cosa = cos (ang); *x = (cosa * dx - sina * dy) / scale_x + cen_x; *y = (sina * dx + cosa * dy) / scale_y + cen_y; } else { *x = wx; *y = wy; } return inside; } static guchar bilinear (double x, double y, guchar *values) { double m0, m1; x = fmod (x, 1.0); y = fmod (y, 1.0); if (x < 0.0) x += 1.0; if (y < 0.0) y += 1.0; m0 = (double) values[0] + x * ((double) values[1] - values[0]); m1 = (double) values[2] + x * ((double) values[3] - values[2]); return (guchar) (m0 + y * (m1 - m0)); } static pixel_fetcher_t * pixel_fetcher_new (GDrawable *drawable) { pixel_fetcher_t *pf; pf = g_malloc (sizeof (pixel_fetcher_t)); pf->col = -1; pf->row = -1; pf->img_width = gimp_drawable_width (drawable->id); pf->img_height = gimp_drawable_height (drawable->id); pf->img_bpp = gimp_drawable_bpp (drawable->id); pf->img_has_alpha = gimp_drawable_has_alpha (drawable->id); pf->tile_width = gimp_tile_width (); pf->tile_height = gimp_tile_height (); pf->bg_color[0] = 0; pf->bg_color[1] = 0; pf->bg_color[2] = 0; pf->bg_color[3] = 0; pf->drawable = drawable; pf->tile = NULL; return pf; } static void pixel_fetcher_set_bg_color (pixel_fetcher_t *pf, guchar r, guchar g, guchar b, guchar a) { pf->bg_color[0] = r; pf->bg_color[1] = g; pf->bg_color[2] = b; if (pf->img_has_alpha) pf->bg_color[pf->img_bpp - 1] = a; } static void pixel_fetcher_get_pixel (pixel_fetcher_t *pf, int x, int y, guchar *pixel) { gint col, row; gint coloff, rowoff; guchar *p; int i; if ((x < sel_x1) || (x >= sel_x2) || (y < sel_y1) || (y >= sel_y2)) { for (i = 0; i < pf->img_bpp; i++) pixel[i] = pf->bg_color[i]; return; } col = x / pf->tile_width; coloff = x % pf->tile_width; row = y / pf->tile_height; rowoff = y % pf->tile_height; if ((col != pf->col) || (row != pf->row) || (pf->tile == NULL)) { if (pf->tile != NULL) gimp_tile_unref (pf->tile, FALSE); pf->tile = gimp_drawable_get_tile (pf->drawable, FALSE, row, col); gimp_tile_ref (pf->tile); pf->col = col; pf->row = row; } p = pf->tile->data + pf->img_bpp * (pf->tile->ewidth * rowoff + coloff); for (i = pf->img_bpp; i; i--) *pixel++ = *p++; } static void pixel_fetcher_destroy (pixel_fetcher_t *pf) { if (pf->tile != NULL) gimp_tile_unref (pf->tile, FALSE); g_free (pf); } static void build_preview_source_image (void) { double left, right, bottom, top; double px, py; double dx, dy; int x, y; guchar *p; guchar pixel[4]; pixel_fetcher_t *pf; wpint.check_row_0 = g_new (guchar, preview_width); wpint.check_row_1 = g_new (guchar, preview_width); wpint.image = g_new (guchar, preview_width * preview_height * 4); wpint.dimage = g_new (guchar, preview_width * preview_height * 3); left = sel_x1; right = sel_x2 - 1; bottom = sel_y2 - 1; top = sel_y1; dx = (right - left) / (preview_width - 1); dy = (bottom - top) / (preview_height - 1); py = top; pf = pixel_fetcher_new (drawable); p = wpint.image; for (y = 0; y < preview_height; y++) { px = left; for (x = 0; x < preview_width; x++) { /* Checks */ if ((x / CHECK_SIZE) & 1) { wpint.check_row_0[x] = CHECK_DARK; wpint.check_row_1[x] = CHECK_LIGHT; } else { wpint.check_row_0[x] = CHECK_LIGHT; wpint.check_row_1[x] = CHECK_DARK; } /* Thumbnail image */ pixel_fetcher_get_pixel (pf, (int) px, (int) py, pixel); if (img_bpp < 3) { if (img_has_alpha) pixel[3] = pixel[1]; else pixel[3] = 255; pixel[1] = pixel[0]; pixel[2] = pixel[0]; } else if (!img_has_alpha) pixel[3] = 255; *p++ = pixel[0]; *p++ = pixel[1]; *p++ = pixel[2]; *p++ = pixel[3]; px += dx; } py += dy; } pixel_fetcher_destroy (pf); } static gint whirl_pinch_dialog (void) { GtkWidget *dialog; GtkWidget *top_table; GtkWidget *frame; GtkWidget *table; gint argc; gchar **argv; guchar *color_cube; #if 0 g_print ("Waiting... (pid %d)\n", getpid ()); kill (getpid (), SIGSTOP); #endif argc = 1; argv = g_new (gchar *, 1); argv[0] = g_strdup ("whirlpinch"); gtk_init (&argc, &argv); gtk_rc_parse (gimp_gtkrc ()); gdk_set_use_xshm (gimp_use_xshm ()); gtk_preview_set_gamma (gimp_gamma ()); gtk_preview_set_install_cmap (gimp_install_cmap ()); color_cube = gimp_color_cube (); gtk_preview_set_color_cube (color_cube[0], color_cube[1], color_cube[2], color_cube[3]); gtk_widget_set_default_visual (gtk_preview_get_visual ()); gtk_widget_set_default_colormap (gtk_preview_get_cmap ()); build_preview_source_image (); dialog = gimp_dialog_new ("Whirl and Pinch", "whirlpinch", gimp_plugin_help_func, "filters/whirlpinch.html", GTK_WIN_POS_MOUSE, FALSE, TRUE, FALSE, "OK", dialog_ok_callback, NULL, NULL, NULL, TRUE, FALSE, "Cancel", gtk_widget_destroy, NULL, 1, NULL, FALSE, TRUE, NULL); gtk_signal_connect (GTK_OBJECT (dialog), "destroy", GTK_SIGNAL_FUNC (gtk_main_quit), NULL); top_table = gtk_table_new (2, 3, FALSE); gtk_container_set_border_width (GTK_CONTAINER (top_table), 6); gtk_table_set_row_spacings (GTK_TABLE (top_table), 4); gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), top_table, FALSE, FALSE, 0); gtk_widget_show (top_table); /* Preview */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_table_attach (GTK_TABLE (top_table), frame, 1, 2, 0, 1, 0, 0, 0, 0); gtk_widget_show (frame); wpint.preview = gtk_preview_new (GTK_PREVIEW_COLOR); gtk_preview_size (GTK_PREVIEW (wpint.preview), preview_width, preview_height); gtk_container_add (GTK_CONTAINER (frame), wpint.preview); gtk_widget_show (wpint.preview); /* Controls */ table = gtk_table_new (3, 3, FALSE); gtk_table_set_col_spacings (GTK_TABLE (table), 4); gtk_table_set_row_spacings (GTK_TABLE (table), 2); gtk_table_attach (GTK_TABLE (top_table), table, 0, 3, 1, 2, GTK_EXPAND | GTK_FILL, 0, 0, 0); gtk_widget_show (table); dialog_create_value ("Whirl Angle:", GTK_TABLE (table), 0, &wpvals.whirl, -360.0, 360.0, 1.0); dialog_create_value ("Pinch Amount:", GTK_TABLE (table), 1, &wpvals.pinch, -1.0, 1.0, 0.01); dialog_create_value ("Radius:", GTK_TABLE (table), 2, &wpvals.radius, 0.0, 2.0, 0.01); /* Done */ gtk_widget_show (dialog); dialog_update_preview (); gtk_main (); gdk_flush (); g_free (wpint.check_row_0); g_free (wpint.check_row_1); g_free (wpint.image); g_free (wpint.dimage); return wpint.run; } static void dialog_update_preview (void) { double left, right, bottom, top; double dx, dy; double px, py; double cx, cy; int ix, iy; int x, y; double whirl; double scale_x, scale_y; guchar *p_ul, *p_lr, *i, *p; guchar *check_ul, *check_lr; int check; guchar outside[4]; gimp_palette_get_background(&outside[0], &outside[1], &outside[2]); outside[3] = (img_has_alpha ? 0 : 255); if (img_bpp < 3) { outside[1] = outside[0]; outside[2] = outside[0]; } left = sel_x1; right = sel_x2 - 1; bottom = sel_y2 - 1; top = sel_y1; dx = (right - left) / (preview_width - 1); dy = (bottom - top) / (preview_height - 1); whirl = wpvals.whirl * G_PI / 180.0; radius2 = radius * radius * wpvals.radius; scale_x = (double) preview_width / (right - left + 1); scale_y = (double) preview_height / (bottom - top + 1); py = top; p_ul = wpint.dimage; p_lr = wpint.dimage + 3 * (preview_width * preview_height - 1); for (y = 0; y <= (preview_height / 2); y++) { px = left; if ((y / CHECK_SIZE) & 1) check_ul = wpint.check_row_0; else check_ul = wpint.check_row_1; if (((preview_height - y - 1) / CHECK_SIZE) & 1) check_lr = wpint.check_row_0; else check_lr = wpint.check_row_1; for (x = 0; x < preview_width; x++) { calc_undistorted_coords (px, py, whirl, wpvals.pinch, &cx, &cy); cx = (cx - left) * scale_x; cy = (cy - top) * scale_y; /* Upper left mirror */ ix = (int) (cx + 0.5); iy = (int) (cy + 0.5); check = check_ul[x]; if ((ix >= 0) && (ix < preview_width) && (iy >= 0) && (iy < preview_height)) i = wpint.image + 4 * (preview_width * iy + ix); else i = outside; p_ul[0] = check + ((i[0] - check) * i[3]) / 255; p_ul[1] = check + ((i[1] - check) * i[3]) / 255; p_ul[2] = check + ((i[2] - check) * i[3]) / 255; p_ul += 3; /* Lower right mirror */ ix = preview_width - ix - 1; iy = preview_height - iy - 1; check = check_lr[preview_width - x - 1]; if ((ix >= 0) && (ix < preview_width) && (iy >= 0) && (iy < preview_height)) i = wpint.image + 4 * (preview_width * iy + ix); else i = outside; p_lr[0] = check + ((i[0] - check) * i[3]) / 255; p_lr[1] = check + ((i[1] - check) * i[3]) / 255; p_lr[2] = check + ((i[2] - check) * i[3]) / 255; p_lr -= 3; px += dx; } py += dy; } p = wpint.dimage; for (y = 0; y < preview_height; y++) { gtk_preview_draw_row (GTK_PREVIEW (wpint.preview), p, 0, y, preview_width); p += preview_width * 3; } gtk_widget_draw (wpint.preview, NULL); gdk_flush (); } static void dialog_create_value (char *title, GtkTable *table, int row, gdouble *value, double left, double right, double step) { GtkWidget *label; GtkWidget *scale; GtkWidget *entry; GtkObject *scale_data; gchar buf[256]; label = gtk_label_new (title); gtk_misc_set_alignment (GTK_MISC(label), 1.0, 0.5); gtk_table_attach (table, label, 0, 1, row, row + 1, GTK_FILL, GTK_FILL, 0, 0); gtk_widget_show (label); scale_data = gtk_adjustment_new (*value, left, right, step, step, 0.0); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) dialog_scale_update, value); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (table, scale, 1, 2, row, row + 1, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0); gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE); gtk_scale_set_digits (GTK_SCALE (scale), 3); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_CONTINUOUS); gtk_widget_show (scale); entry = gtk_entry_new (); gtk_object_set_user_data (GTK_OBJECT (entry), scale_data); gtk_object_set_user_data (scale_data, entry); gtk_widget_set_usize (entry, ENTRY_WIDTH, 0); g_snprintf (buf, sizeof (buf), "%0.3f", *value); gtk_entry_set_text (GTK_ENTRY (entry), buf); gtk_signal_connect (GTK_OBJECT (entry), "changed", (GtkSignalFunc) dialog_entry_update, value); gtk_table_attach (GTK_TABLE (table), entry, 2, 3, row, row + 1, GTK_FILL, GTK_FILL, 0, 0); gtk_widget_show (entry); } static void dialog_scale_update (GtkAdjustment *adjustment, gdouble *value) { GtkWidget *entry; gchar buf[256]; if (*value != adjustment->value) { *value = adjustment->value; entry = gtk_object_get_user_data (GTK_OBJECT (adjustment)); g_snprintf (buf, sizeof (buf), "%0.3f", *value); gtk_signal_handler_block_by_data (GTK_OBJECT (entry), value); gtk_entry_set_text (GTK_ENTRY (entry), buf); gtk_signal_handler_unblock_by_data (GTK_OBJECT (entry), value); dialog_update_preview (); } } static void dialog_entry_update (GtkWidget *widget, gdouble *value) { GtkAdjustment *adjustment; gdouble new_value; new_value = atof (gtk_entry_get_text (GTK_ENTRY (widget))); if (*value != new_value) { adjustment = gtk_object_get_user_data (GTK_OBJECT (widget)); if ((new_value >= adjustment->lower) && (new_value <= adjustment->upper)) { *value = new_value; adjustment->value = new_value; gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed"); dialog_update_preview (); } } } static void dialog_ok_callback (GtkWidget *widget, gpointer data) { wpint.run = TRUE; gtk_widget_destroy (GTK_WIDGET (data)); }