diff options
Diffstat (limited to 'plug-ins/gimpressionist/preview.c')
| -rw-r--r-- | plug-ins/gimpressionist/preview.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/plug-ins/gimpressionist/preview.c b/plug-ins/gimpressionist/preview.c new file mode 100644 index 0000000..3619782 --- /dev/null +++ b/plug-ins/gimpressionist/preview.c @@ -0,0 +1,191 @@ +/* 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 <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <string.h> + +#include <gtk/gtk.h> + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "gimpressionist.h" +#include "ppmtool.h" +#include "infile.h" +#include "preview.h" + +#include "libgimp/stdplugins-intl.h" + + +static GtkWidget *preview = NULL; +static GtkWidget *previewbutton = NULL; + +void +preview_set_button_label (const gchar *text) +{ + g_object_set (previewbutton, + "label", text, + "use-underline", TRUE, + NULL); +} + +static void +drawalpha (ppm_t *p, ppm_t *a) +{ + int x, y, g; + double v; + int gridsize = 16; + int rowstride = p->width * 3; + + for (y = 0; y < p->height; y++) + { + for (x = 0; x < p->width; x++) + { + int k = y * rowstride + x * 3; + + if (!a->col[k]) + continue; + + v = 1.0 - a->col[k] / 255.0; + g = ((x / gridsize + y / gridsize) % 2) * 60 + 100; + p->col[k+0] *= v; + p->col[k+1] *= v; + p->col[k+2] *= v; + v = 1.0 - v; + p->col[k+0] += g*v; + p->col[k+1] += g*v; + p->col[k+2] += g*v; + } + } +} + +static ppm_t preview_ppm = {0, 0, NULL}; +static ppm_t alpha_ppm = {0, 0, NULL}; +static ppm_t backup_ppm = {0, 0, NULL}; +static ppm_t alpha_backup_ppm = {0, 0, NULL}; + +void +preview_free_resources (void) +{ + ppm_kill (&preview_ppm); + ppm_kill (&alpha_ppm); + ppm_kill (&backup_ppm); + ppm_kill (&alpha_backup_ppm); +} + +void +updatepreview (GtkWidget *wg, gpointer d) +{ + if (!PPM_IS_INITED (&backup_ppm)) + { + infile_copy_to_ppm (&backup_ppm); + if ((backup_ppm.width != PREVIEWSIZE) || + (backup_ppm.height != PREVIEWSIZE)) + resize_fast (&backup_ppm, PREVIEWSIZE, PREVIEWSIZE); + if (img_has_alpha) + { + infile_copy_alpha_to_ppm (&alpha_backup_ppm); + if ((alpha_backup_ppm.width != PREVIEWSIZE) || + (alpha_backup_ppm.height != PREVIEWSIZE)) + resize_fast (&alpha_backup_ppm, PREVIEWSIZE, PREVIEWSIZE); + } + } + + if (!PPM_IS_INITED (&preview_ppm)) + { + ppm_copy (&backup_ppm, &preview_ppm); + + if (img_has_alpha) + ppm_copy (&alpha_backup_ppm, &alpha_ppm); + } + + if (d) + { + store_values (); + + if (GPOINTER_TO_INT (d) != 2) + repaint (&preview_ppm, &alpha_ppm); + } + + if (img_has_alpha) + drawalpha (&preview_ppm, &alpha_ppm); + + gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview), + 0, 0, PREVIEWSIZE, PREVIEWSIZE, + GIMP_RGB_IMAGE, + preview_ppm.col, + PREVIEWSIZE * 3); + + ppm_kill (&preview_ppm); + if (img_has_alpha) + ppm_kill (&alpha_ppm); +} + +static void +preview_size_allocate (GtkWidget *preview) +{ + updatepreview (preview, GINT_TO_POINTER (0)); +} + +GtkWidget * +create_preview (void) +{ + GtkWidget *hbox; + GtkWidget *vbox; + GtkWidget *frame; + GtkWidget *button; + + vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6); + + frame = gtk_frame_new (NULL); + gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); + gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 5); + gtk_widget_show (frame); + + preview = gimp_preview_area_new (); + gtk_widget_set_size_request (preview, PREVIEWSIZE, PREVIEWSIZE); + + gtk_container_add (GTK_CONTAINER (frame), preview); + gtk_widget_show (preview); + /* This is so the preview will be displayed when the dialog is invoked. */ + g_signal_connect (preview, "size-allocate", + G_CALLBACK (preview_size_allocate), NULL); + + hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6); + gtk_box_set_homogeneous (GTK_BOX (hbox), TRUE); + gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0); + gtk_widget_show (hbox); + + previewbutton = button = gtk_button_new_with_mnemonic (_("_Update")); + g_signal_connect (button, "clicked", + G_CALLBACK (updatepreview), (gpointer) 1); + gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0); + gtk_widget_show (button); + gimp_help_set_help_data (button, + _("Refresh the Preview window"), NULL); + + button = gtk_button_new_with_mnemonic (_("_Reset")); + g_signal_connect (button, "clicked", + G_CALLBACK (updatepreview), (gpointer) 2); + gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0); + gtk_widget_show (button); + gimp_help_set_help_data (button, + _("Revert to the original image"), NULL); + + return vbox; +} |