From 5c1676dfe6d2f3c837a5e074117b45613fd29a72 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:30:19 +0200 Subject: Adding upstream version 2.10.34. Signed-off-by: Daniel Baumann --- plug-ins/common/softglow.c | 713 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 713 insertions(+) create mode 100644 plug-ins/common/softglow.c (limited to 'plug-ins/common/softglow.c') diff --git a/plug-ins/common/softglow.c b/plug-ins/common/softglow.c new file mode 100644 index 0000000..9a718a0 --- /dev/null +++ b/plug-ins/common/softglow.c @@ -0,0 +1,713 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * 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 3 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, see . + */ + +/* Softglow filter for GIMP for BIPS + * -Spencer Kimball + * + * This filter screens a desaturated, sigmoidally transferred + * and gaussian blurred version of the drawable over itself + * to create a "softglow" photographic effect. + */ + +#include "config.h" + +#include + +#include +#include + +#include "libgimp/stdplugins-intl.h" + + +/* Some useful macros */ + +#define PLUG_IN_PROC "plug-in-softglow" +#define PLUG_IN_BINARY "softglow" +#define PLUG_IN_ROLE "gimp-softglow" +#define TILE_CACHE_SIZE 48 +#define SIGMOIDAL_BASE 2 +#define SIGMOIDAL_RANGE 20 + +#define INT_MULT(a,b,t) ((t) = (a) * (b) + 0x80, ((((t) >> 8) + (t)) >> 8)) + +typedef struct +{ + gdouble glow_radius; + gdouble brightness; + gdouble sharpness; +} SoftglowVals; + + +/* + * Function prototypes. + */ + +static void query (void); +static void run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals); + +static void softglow (GimpDrawable *drawable, + GimpPreview *preview); +static gboolean softglow_dialog (GimpDrawable *drawable); + +/* + * Gaussian blur helper functions + */ +static void find_constants (gdouble n_p[], + gdouble n_m[], + gdouble d_p[], + gdouble d_m[], + gdouble bd_p[], + gdouble bd_m[], + gdouble std_dev); +static void transfer_pixels (gdouble *src1, + gdouble *src2, + guchar *dest, + gint jump, + gint width); + +/***** Local vars *****/ + +const GimpPlugInInfo PLUG_IN_INFO = +{ + NULL, /* init */ + NULL, /* quit */ + query, /* query */ + run, /* run */ +}; + +static SoftglowVals svals = +{ + 10.0, /* glow_radius */ + 0.75, /* brightness */ + 0.85, /* sharpness */ +}; + + +/***** Functions *****/ + +MAIN () + +static void +query (void) +{ + static const GimpParamDef args[] = + { + { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" }, + { GIMP_PDB_IMAGE, "image", "Input image (unused)" }, + { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" }, + { GIMP_PDB_FLOAT, "glow-radius", "Glow radius (radius in pixels)" }, + { GIMP_PDB_FLOAT, "brightness", "Glow brightness (0.0 - 1.0)" }, + { GIMP_PDB_FLOAT, "sharpness", "Glow sharpness (0.0 - 1.0)" } + }; + + gchar *help_string = + "Gives an image a softglow effect by intensifying the highlights in the " + "image. This is done by screening a modified version of the drawable " + "with itself. The modified version is desaturated and then a sigmoidal " + "transfer function is applied to force the distribution of intensities " + "into very small and very large only. This desaturated version is then " + "blurred to give it a fuzzy 'vaseline-on-the-lens' effect. The glow " + "radius parameter controls the sharpness of the glow effect. The " + "brightness parameter controls the degree of intensification applied " + "to image highlights. The sharpness parameter controls how defined or " + "alternatively, diffuse, the glow effect should be."; + + gimp_install_procedure (PLUG_IN_PROC, + N_("Simulate glow by making highlights intense and fuzzy"), + help_string, + "Spencer Kimball", + "Bit Specialists, Inc.", + "2001", + N_("_Softglow (legacy)..."), + "RGB*, GRAY*", + GIMP_PLUGIN, + G_N_ELEMENTS (args), 0, + args, NULL); + + gimp_plugin_menu_register (PLUG_IN_PROC, "/Filters/Artistic"); +} + +static void +run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals) +{ + static GimpParam values[2]; + GimpRunMode run_mode; + GimpDrawable *drawable; + GimpPDBStatusType status = GIMP_PDB_SUCCESS; + + run_mode = param[0].data.d_int32; + + /* Get the specified drawable */ + drawable = gimp_drawable_get (param[2].data.d_drawable); + + /* set the tile cache size */ + gimp_tile_cache_ntiles (TILE_CACHE_SIZE); + + *nreturn_vals = 1; + *return_vals = values; + + values[0].type = GIMP_PDB_STATUS; + values[0].data.d_status = status; + + INIT_I18N(); + + switch (run_mode) + { + case GIMP_RUN_INTERACTIVE: + /* Possibly retrieve data */ + gimp_get_data (PLUG_IN_PROC, &svals); + + /* First acquire information with a dialog */ + if (! softglow_dialog (drawable)) + return; + break; + + case GIMP_RUN_NONINTERACTIVE: + svals.glow_radius = param[3].data.d_float; + svals.brightness = param[4].data.d_float; + svals.sharpness = param[5].data.d_float; + break; + + case GIMP_RUN_WITH_LAST_VALS: + /* Possibly retrieve data */ + gimp_get_data (PLUG_IN_PROC, &svals); + break; + + default: + break; + } + + if (status == GIMP_PDB_SUCCESS) + { + /* Make sure that the drawable is RGB or GRAY color */ + if (gimp_drawable_is_rgb (drawable->drawable_id) || + gimp_drawable_is_gray (drawable->drawable_id)) + { + gimp_progress_init ("Softglow"); + + softglow (drawable, NULL); + + if (run_mode != GIMP_RUN_NONINTERACTIVE) + gimp_displays_flush (); + + /* Store data */ + if (run_mode == GIMP_RUN_INTERACTIVE) + gimp_set_data (PLUG_IN_PROC, &svals, sizeof (SoftglowVals)); + } + else + { + status = GIMP_PDB_EXECUTION_ERROR; + *nreturn_vals = 2; + values[1].type = GIMP_PDB_STRING; + values[1].data.d_string = _("Cannot operate on indexed color images."); + } + } + + values[0].data.d_status = status; + + gimp_drawable_detach (drawable); +} + +static void +softglow (GimpDrawable *drawable, + GimpPreview *preview) +{ + GimpPixelRgn src_rgn, dest_rgn; + GimpPixelRgn *pr; + gint width, height; + gint bytes; + gboolean has_alpha; + guchar *dest; + guchar *src, *sp_p, *sp_m; + gdouble n_p[5], n_m[5]; + gdouble d_p[5], d_m[5]; + gdouble bd_p[5], bd_m[5]; + gdouble *val_p, *val_m, *vp, *vm; + gint x1, y1; + gint i, j; + gint row, col, b; + gint terms; + gint progress, max_progress; + gint initial_p[4]; + gint initial_m[4]; + gint tmp; + gdouble radius; + gdouble std_dev; + gdouble val; + + if (preview) + { + gimp_preview_get_position (preview, &x1, &y1); + gimp_preview_get_size (preview, &width, &height); + } + else if (! gimp_drawable_mask_intersect (drawable->drawable_id, + &x1, &y1, &width, &height)) + return; + + bytes = drawable->bpp; + has_alpha = gimp_drawable_has_alpha (drawable->drawable_id); + + val_p = g_new (gdouble, MAX (width, height)); + val_m = g_new (gdouble, MAX (width, height)); + + dest = g_new0 (guchar, width * height); + + progress = 0; + max_progress = width * height * 3; + + /* Initialize the pixel regions. */ + gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE); + + for (pr = gimp_pixel_rgns_register (1, &src_rgn); + pr != NULL; + pr = gimp_pixel_rgns_process (pr)) + { + guchar *src_ptr = src_rgn.data; + guchar *dest_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1); + + for (row = 0; row < src_rgn.h; row++) + { + for (col = 0; col < src_rgn.w; col++) + { + /* desaturate */ + if (bytes > 2) + dest_ptr[col] = (guchar) gimp_rgb_to_l_int (src_ptr[col * bytes + 0], + src_ptr[col * bytes + 1], + src_ptr[col * bytes + 2]); + else + dest_ptr[col] = (guchar) src_ptr[col * bytes]; + + /* compute sigmoidal transfer */ + val = dest_ptr[col] / 255.0; + val = 255.0 / (1 + exp (-(SIGMOIDAL_BASE + (svals.sharpness * SIGMOIDAL_RANGE)) * (val - 0.5))); + val = val * svals.brightness; + dest_ptr[col] = (guchar) CLAMP (val, 0, 255); + } + + src_ptr += src_rgn.rowstride; + dest_ptr += width; + } + + if (!preview) + { + progress += src_rgn.w * src_rgn.h; + gimp_progress_update ((gdouble) progress / (gdouble) max_progress); + } + } + + /* Calculate the standard deviations */ + radius = fabs (svals.glow_radius) + 1.0; + std_dev = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0))); + + /* derive the constants for calculating the gaussian from the std dev */ + find_constants (n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev); + + /* First the vertical pass */ + for (col = 0; col < width; col++) + { + memset (val_p, 0, height * sizeof (gdouble)); + memset (val_m, 0, height * sizeof (gdouble)); + + src = dest + col; + sp_p = src; + sp_m = src + width * (height - 1); + vp = val_p; + vm = val_m + (height - 1); + + /* Set up the first vals */ + initial_p[0] = sp_p[0]; + initial_m[0] = sp_m[0]; + + for (row = 0; row < height; row++) + { + gdouble *vpptr, *vmptr; + + terms = (row < 4) ? row : 4; + + vpptr = vp; vmptr = vm; + for (i = 0; i <= terms; i++) + { + *vpptr += n_p[i] * sp_p[-i * width] - d_p[i] * vp[-i]; + *vmptr += n_m[i] * sp_m[i * width] - d_m[i] * vm[i]; + } + for (j = i; j <= 4; j++) + { + *vpptr += (n_p[j] - bd_p[j]) * initial_p[0]; + *vmptr += (n_m[j] - bd_m[j]) * initial_m[0]; + } + + sp_p += width; + sp_m -= width; + vp ++; + vm --; + } + + transfer_pixels (val_p, val_m, dest + col, width, height); + + if (!preview) + { + progress += height; + if ((col % 5) == 0) + gimp_progress_update ((gdouble) progress / (gdouble) max_progress); + } + } + + for (row = 0; row < height; row++) + { + memset (val_p, 0, width * sizeof (gdouble)); + memset (val_m, 0, width * sizeof (gdouble)); + + src = dest + row * width; + + sp_p = src; + sp_m = src + width - 1; + vp = val_p; + vm = val_m + width - 1; + + /* Set up the first vals */ + initial_p[0] = sp_p[0]; + initial_m[0] = sp_m[0]; + + for (col = 0; col < width; col++) + { + gdouble *vpptr, *vmptr; + + terms = (col < 4) ? col : 4; + + vpptr = vp; vmptr = vm; + + for (i = 0; i <= terms; i++) + { + *vpptr += n_p[i] * sp_p[-i] - d_p[i] * vp[-i]; + *vmptr += n_m[i] * sp_m[i] - d_m[i] * vm[i]; + } + + for (j = i; j <= 4; j++) + { + *vpptr += (n_p[j] - bd_p[j]) * initial_p[0]; + *vmptr += (n_m[j] - bd_m[j]) * initial_m[0]; + } + + sp_p ++; + sp_m --; + vp ++; + vm --; + } + + transfer_pixels (val_p, val_m, dest + row * width, 1, width); + + if (!preview) + { + progress += width; + if ((row % 5) == 0) + gimp_progress_update ((gdouble) progress / (gdouble) max_progress); + } + } + + /* Initialize the pixel regions. */ + gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE); + gimp_pixel_rgn_init (&dest_rgn, drawable, + x1, y1, width, height, (preview == NULL), TRUE); + + for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn); + pr != NULL; + pr = gimp_pixel_rgns_process (pr)) + { + guchar *src_ptr = src_rgn.data; + guchar *dest_ptr = dest_rgn.data; + guchar *blur_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1); + + for (row = 0; row < src_rgn.h; row++) + { + for (col = 0; col < src_rgn.w; col++) + { + /* screen op */ + for (b = 0; b < (has_alpha ? (bytes - 1) : bytes); b++) + dest_ptr[col * bytes + b] = + 255 - INT_MULT((255 - src_ptr[col * bytes + b]), + (255 - blur_ptr[col]), tmp); + if (has_alpha) + dest_ptr[col * bytes + b] = src_ptr[col * bytes + b]; + } + + src_ptr += src_rgn.rowstride; + dest_ptr += dest_rgn.rowstride; + blur_ptr += width; + } + + if (preview) + { + gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview), + &dest_rgn); + } + else + { + progress += src_rgn.w * src_rgn.h; + gimp_progress_update ((gdouble) progress / (gdouble) max_progress); + } + } + + if (! preview) + { + gimp_progress_update (1.0); + /* merge the shadow, update the drawable */ + gimp_drawable_flush (drawable); + gimp_drawable_merge_shadow (drawable->drawable_id, TRUE); + gimp_drawable_update (drawable->drawable_id, + x1, y1, width, height); + } + + /* free up buffers */ + g_free (val_p); + g_free (val_m); + g_free (dest); +} + +/* + * Gaussian blur helper functions + */ + +static void +transfer_pixels (gdouble *src1, + gdouble *src2, + guchar *dest, + gint jump, + gint width) +{ + gint i; + gdouble sum; + + for (i = 0; i < width; i++) + { + sum = src1[i] + src2[i]; + + sum = CLAMP0255 (sum); + + *dest = (guchar) sum; + dest += jump; + } +} + +static void +find_constants (gdouble n_p[], + gdouble n_m[], + gdouble d_p[], + gdouble d_m[], + gdouble bd_p[], + gdouble bd_m[], + gdouble std_dev) +{ + gint i; + gdouble constants [8]; + gdouble div; + + /* The constants used in the implementation of a casual sequence + * using a 4th order approximation of the gaussian operator + */ + + div = sqrt(2 * G_PI) * std_dev; + + constants [0] = -1.783 / std_dev; + constants [1] = -1.723 / std_dev; + constants [2] = 0.6318 / std_dev; + constants [3] = 1.997 / std_dev; + constants [4] = 1.6803 / div; + constants [5] = 3.735 / div; + constants [6] = -0.6803 / div; + constants [7] = -0.2598 / div; + + n_p [0] = constants[4] + constants[6]; + n_p [1] = exp (constants[1]) * + (constants[7] * sin (constants[3]) - + (constants[6] + 2 * constants[4]) * cos (constants[3])) + + exp (constants[0]) * + (constants[5] * sin (constants[2]) - + (2 * constants[6] + constants[4]) * cos (constants[2])); + n_p [2] = 2 * exp (constants[0] + constants[1]) * + ((constants[4] + constants[6]) * cos (constants[3]) * cos (constants[2]) - + constants[5] * cos (constants[3]) * sin (constants[2]) - + constants[7] * cos (constants[2]) * sin (constants[3])) + + constants[6] * exp (2 * constants[0]) + + constants[4] * exp (2 * constants[1]); + n_p [3] = exp (constants[1] + 2 * constants[0]) * + (constants[7] * sin (constants[3]) - constants[6] * cos (constants[3])) + + exp (constants[0] + 2 * constants[1]) * + (constants[5] * sin (constants[2]) - constants[4] * cos (constants[2])); + n_p [4] = 0.0; + + d_p [0] = 0.0; + d_p [1] = -2 * exp (constants[1]) * cos (constants[3]) - + 2 * exp (constants[0]) * cos (constants[2]); + d_p [2] = 4 * cos (constants[3]) * cos (constants[2]) * exp (constants[0] + constants[1]) + + exp (2 * constants[1]) + exp (2 * constants[0]); + d_p [3] = -2 * cos (constants[2]) * exp (constants[0] + 2 * constants[1]) - + 2 * cos (constants[3]) * exp (constants[1] + 2 * constants[0]); + d_p [4] = exp (2 * constants[0] + 2 * constants[1]); + +#ifndef ORIGINAL_READABLE_CODE + memcpy(d_m, d_p, 5 * sizeof(gdouble)); +#else + for (i = 0; i <= 4; i++) + d_m [i] = d_p [i]; +#endif + + n_m[0] = 0.0; + for (i = 1; i <= 4; i++) + n_m [i] = n_p[i] - d_p[i] * n_p[0]; + + { + gdouble sum_n_p, sum_n_m, sum_d; + gdouble a, b; + + sum_n_p = 0.0; + sum_n_m = 0.0; + sum_d = 0.0; + + for (i = 0; i <= 4; i++) + { + sum_n_p += n_p[i]; + sum_n_m += n_m[i]; + sum_d += d_p[i]; + } + +#ifndef ORIGINAL_READABLE_CODE + sum_d++; + a = sum_n_p / sum_d; + b = sum_n_m / sum_d; +#else + a = sum_n_p / (1 + sum_d); + b = sum_n_m / (1 + sum_d); +#endif + + for (i = 0; i <= 4; i++) + { + bd_p[i] = d_p[i] * a; + bd_m[i] = d_m[i] * b; + } + } +} + +/*******************************************************/ +/* Dialog */ +/*******************************************************/ + +static gboolean +softglow_dialog (GimpDrawable *drawable) +{ + GtkWidget *dialog; + GtkWidget *main_vbox; + GtkWidget *preview; + GtkWidget *table; + GtkObject *scale_data; + gboolean run; + + gimp_ui_init (PLUG_IN_BINARY, FALSE); + + dialog = gimp_dialog_new (_("Softglow"), PLUG_IN_ROLE, + NULL, 0, + gimp_standard_help_func, PLUG_IN_PROC, + + _("_Cancel"), GTK_RESPONSE_CANCEL, + _("_OK"), GTK_RESPONSE_OK, + + NULL); + + gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog), + GTK_RESPONSE_OK, + GTK_RESPONSE_CANCEL, + -1); + + gimp_window_set_transient (GTK_WINDOW (dialog)); + + main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12); + gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12); + gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), + main_vbox, TRUE, TRUE, 0); + gtk_widget_show (main_vbox); + + preview = gimp_drawable_preview_new_from_drawable_id (drawable->drawable_id); + gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0); + gtk_widget_show (preview); + + g_signal_connect_swapped (preview, "invalidated", + G_CALLBACK (softglow), + drawable); + + table = gtk_table_new (3, 3, FALSE); + gtk_table_set_col_spacings (GTK_TABLE (table), 6); + gtk_table_set_row_spacings (GTK_TABLE (table), 6); + gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0); + gtk_widget_show (table); + + /* Label, scale, entry for svals.amount */ + scale_data = gimp_scale_entry_new (GTK_TABLE (table), 0, 0, + _("_Glow radius:"), 100, 5, + svals.glow_radius, 1.0, 50.0, 1, 5.0, 2, + TRUE, 0, 0, + NULL, NULL); + + g_signal_connect (scale_data, "value-changed", + G_CALLBACK (gimp_double_adjustment_update), + &svals.glow_radius); + g_signal_connect_swapped (scale_data, "value-changed", + G_CALLBACK (gimp_preview_invalidate), + preview); + + /* Label, scale, entry for svals.amount */ + scale_data = gimp_scale_entry_new (GTK_TABLE (table), 0, 1, + _("_Brightness:"), 100, 5, + svals.brightness, 0.0, 1.0, 0.01, 0.1, 2, + TRUE, 0, 0, + NULL, NULL); + + g_signal_connect (scale_data, "value-changed", + G_CALLBACK (gimp_double_adjustment_update), + &svals.brightness); + g_signal_connect_swapped (scale_data, "value-changed", + G_CALLBACK (gimp_preview_invalidate), + preview); + + /* Label, scale, entry for svals.amount */ + scale_data = gimp_scale_entry_new (GTK_TABLE (table), 0, 2, + _("_Sharpness:"), 100, 5, + svals.sharpness, 0.0, 1.0, 0.01, 0.1, 2, + TRUE, 0, 0, + NULL, NULL); + + g_signal_connect (scale_data, "value-changed", + G_CALLBACK (gimp_double_adjustment_update), + &svals.sharpness); + g_signal_connect_swapped (scale_data, "value-changed", + G_CALLBACK (gimp_preview_invalidate), + preview); + + gtk_widget_show (dialog); + + run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK); + + gtk_widget_destroy (dialog); + + return run; +} -- cgit v1.2.3