mirror of https://github.com/GNOME/gimp.git
493 lines
14 KiB
C
493 lines
14 KiB
C
/*
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* This is a plug-in for the GIMP.
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*
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* Generates clickable image maps.
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*
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* Copyright (C) 1998-1999 Maurits Rijk lpeek.mrijk@consunet.nl
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "config.h"
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#ifdef __GNUC__
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#warning GTK_DISABLE_DEPRECATED
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#endif
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#undef GTK_DISABLE_DEPRECATED
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#include <gtk/gtk.h>
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#include "libgimp/gimp.h"
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#include "imap_cmd_edit_object.h"
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#include "imap_grid.h"
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#include "imap_main.h"
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#include "imap_popup.h"
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#include "imap_preview.h"
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#define PREVIEW_MASK (GDK_EXPOSURE_MASK | \
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GDK_POINTER_MOTION_MASK | \
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GDK_BUTTON_PRESS_MASK | \
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GDK_BUTTON_RELEASE_MASK | \
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GDK_BUTTON_MOTION_MASK | \
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GDK_KEY_PRESS_MASK | \
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GDK_KEY_RELEASE_MASK | \
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GDK_ENTER_NOTIFY_MASK | \
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GDK_LEAVE_NOTIFY_MASK)
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#define PREVIEW_SIZE 400
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/*======================================================================
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Preview Rendering Util routine
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=======================================================================*/
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#define CHECKWIDTH 4
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#define LIGHTCHECK 192
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#define DARKCHECK 128
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#ifndef OPAQUE
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#define OPAQUE 255
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#endif
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static Preview_t*
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preview_user_data(GtkWidget *preview)
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{
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return (Preview_t*) gtk_object_get_user_data(GTK_OBJECT(preview));
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}
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gint
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preview_get_width(GtkWidget *preview)
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{
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return preview_user_data(preview)->width;
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}
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gint
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preview_get_height(GtkWidget *preview)
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{
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return preview_user_data(preview)->height;
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}
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static void
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render_gray_image(GtkWidget *preview, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_row, *src, *dest;
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gint row, col;
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gint bpp, dwidth, dheight, pwidth, pheight;
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gint *src_col;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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if(GTK_PREVIEW(preview)->buffer) {
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pwidth = GTK_PREVIEW(preview)->buffer_width;
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pheight = GTK_PREVIEW(preview)->buffer_height;
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} else {
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pwidth = preview->requisition.width;
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pheight = preview->requisition.height;
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}
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bpp = srcrgn->bpp;
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src_row = g_new(guchar, dwidth * bpp);
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dest_row = g_new(guchar, pwidth * 3);
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src_col = g_new(gint, pwidth);
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for (col = 0; col < pwidth; col++)
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src_col[col] = (col * dwidth / pwidth) * bpp;
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for (row = 0; row < pheight; row++) {
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gimp_pixel_rgn_get_row(srcrgn, src_row, 0, row * dheight / pheight,
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dwidth);
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dest = dest_row;
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src = src_row;
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for (col = 0; col < pwidth; col++) {
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src = &src_row[src_col[col]];
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*dest++ = *src;
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*dest++ = *src;
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*dest++ = *src;
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}
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gtk_preview_draw_row(GTK_PREVIEW(preview), dest_row, 0, row, pwidth);
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}
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g_free(src_col);
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g_free(src_row);
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g_free(dest_row);
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}
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static void
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render_indexed_image(GtkWidget *preview, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_row, *src, *dest;
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gint row, col;
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gint dwidth, dheight, pwidth, pheight;
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gint *src_col;
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gint bpp, alpha, has_alpha;
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guchar *cmap, *colour;
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gint ncols;
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gboolean gray = get_map_info()->show_gray;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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if(GTK_PREVIEW(preview)->buffer) {
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pwidth = GTK_PREVIEW(preview)->buffer_width;
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pheight = GTK_PREVIEW(preview)->buffer_height;
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} else {
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pwidth = preview->requisition.width;
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pheight = preview->requisition.height;
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}
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bpp = srcrgn->bpp;
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alpha = bpp;
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has_alpha = gimp_drawable_has_alpha(srcrgn->drawable->drawable_id);
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if (has_alpha)
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alpha--;
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cmap = gimp_image_get_cmap(gimp_drawable_image_id(srcrgn->drawable->drawable_id),
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&ncols);
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src_row = g_new(guchar, dwidth * bpp);
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dest_row = g_new(guchar, pwidth * 3);
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src_col = g_new(gint, pwidth);
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for (col = 0; col < pwidth; col++)
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src_col[col] = (col * dwidth / pwidth) * bpp;
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for (row = 0; row < pheight; row++) {
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gimp_pixel_rgn_get_row(srcrgn, src_row, 0, row * dheight / pheight,
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dwidth);
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dest = dest_row;
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for (col = 0; col < pwidth; col++) {
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src = &src_row[src_col[col]];
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colour = cmap + 3 * (int)(*src);
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if (gray) {
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guchar avg = (299 * *colour++ + 587 * *colour++ +
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114 * *colour++) / 1000;
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*dest++ = avg;
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*dest++ = avg;
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*dest++ = avg;
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} else {
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*dest++ = *colour++;
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*dest++ = *colour++;
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*dest++ = *colour++;
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}
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}
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gtk_preview_draw_row(GTK_PREVIEW(preview), dest_row, 0, row, pwidth);
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}
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g_free(src_col);
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g_free(src_row);
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g_free(dest_row);
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}
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static void
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render_rgb_image(GtkWidget *preview, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_row, *src, *dest;
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gint row, col;
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gint dwidth, dheight, pwidth, pheight;
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gint *src_col;
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gint bpp, alpha, has_alpha, b;
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guchar check;
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gboolean gray = get_map_info()->show_gray;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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if(GTK_PREVIEW(preview)->buffer) {
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pwidth = GTK_PREVIEW(preview)->buffer_width;
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pheight = GTK_PREVIEW(preview)->buffer_height;
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} else {
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pwidth = preview->requisition.width;
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pheight = preview->requisition.height;
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}
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bpp = srcrgn->bpp;
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alpha = bpp;
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has_alpha = gimp_drawable_has_alpha(srcrgn->drawable->drawable_id);
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if (has_alpha)
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alpha--;
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src_row = g_new(guchar, dwidth * bpp);
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dest_row = g_new(guchar, pwidth * bpp);
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src_col = g_new(gint, pwidth);
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for (col = 0; col < pwidth; col++)
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src_col[col] = (col * dwidth / pwidth) * bpp;
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for (row = 0; row < pheight; row++) {
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gimp_pixel_rgn_get_row(srcrgn, src_row, 0, row * dheight / pheight,
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dwidth);
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dest = dest_row;
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for (col = 0; col < pwidth; col++) {
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src = &src_row[src_col[col]];
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if(!has_alpha || src[alpha] == OPAQUE) {
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/* no alpha channel or opaque -- simple way */
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for (b = 0; b < alpha; b++)
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dest[b] = src[b];
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} else {
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/* more or less transparent */
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if( ( col % (CHECKWIDTH*2) < CHECKWIDTH ) ^
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( row % (CHECKWIDTH*2) < CHECKWIDTH ) )
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check = LIGHTCHECK;
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else
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check = DARKCHECK;
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if (src[alpha] == 0) {
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/* full transparent -- check */
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for (b = 0; b < alpha; b++)
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dest[b] = check;
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} else {
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/* middlemost transparent -- mix check and src */
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for (b = 0; b < alpha; b++)
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dest[b] = (src[b] * src[alpha] +
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check * (OPAQUE - src[alpha])) / OPAQUE;
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}
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}
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if (gray) {
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guchar avg;
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avg = (299 * dest[0] + 587 * dest[1] + 114 * dest[2]) / 1000;
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for (b = 0; b < alpha; b++)
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dest[b] = avg;
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}
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dest += alpha;
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}
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gtk_preview_draw_row(GTK_PREVIEW(preview), dest_row, 0, row, pwidth);
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}
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g_free(src_col);
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g_free(src_row);
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g_free(dest_row);
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}
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static void
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render_preview(GtkWidget *preview, GimpPixelRgn *srcrgn)
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{
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switch (gimp_drawable_type(srcrgn->drawable->drawable_id)) {
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case GIMP_RGB_IMAGE:
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case GIMP_RGBA_IMAGE:
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render_rgb_image(preview, srcrgn);
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break;
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case GIMP_GRAY_IMAGE:
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case GIMP_GRAYA_IMAGE:
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render_gray_image(preview, srcrgn);
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break;
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case GIMP_INDEXED_IMAGE:
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case GIMP_INDEXEDA_IMAGE:
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render_indexed_image(preview, srcrgn);
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break;
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}
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}
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static gint
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arrow_cb(GtkWidget *widget, GdkEventButton *event, gpointer data)
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{
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if (event->button == 1)
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do_main_popup_menu(event);
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gtk_signal_emit_stop_by_name(GTK_OBJECT(widget), "button_press_event");
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return FALSE;
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}
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static gint
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preview_expose(GtkWidget *widget, GdkEventExpose *event)
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{
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Preview_t *data = preview_user_data(widget);
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gtk_signal_handler_block(GTK_OBJECT(widget), data->exp_id);
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gtk_widget_draw(widget, (event) ? &event->area : NULL);
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gtk_signal_handler_unblock(GTK_OBJECT(widget), data->exp_id );
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draw_grid(widget);
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draw_shapes(widget);
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return FALSE;
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}
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void
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add_preview_motion_event(Preview_t *preview, GtkSignalFunc func)
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{
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gtk_signal_connect(GTK_OBJECT(preview->preview),
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"motion_notify_event", func, NULL);
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}
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void
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add_enter_notify_event(Preview_t *preview, GtkSignalFunc func)
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{
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gtk_signal_connect(GTK_OBJECT(preview->preview),
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"enter_notify_event", func, NULL);
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}
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void
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add_leave_notify_event(Preview_t *preview, GtkSignalFunc func)
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{
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gtk_signal_connect(GTK_OBJECT(preview->preview),
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"leave_notify_event", func, NULL);
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}
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void
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add_preview_button_press_event(Preview_t *preview, GtkSignalFunc func)
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{
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gtk_signal_connect(GTK_OBJECT(preview->preview),
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"button_press_event", func, NULL);
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}
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void
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preview_redraw(Preview_t *preview)
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{
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preview_expose(preview->preview, NULL);
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}
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void
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preview_zoom(Preview_t *preview, gint zoom_factor)
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{
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gint pwidth = preview->width * zoom_factor;
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gint pheight = preview->height * zoom_factor;
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gtk_preview_size(GTK_PREVIEW(preview->preview), pwidth, pheight);
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gtk_widget_queue_resize(preview->window);
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render_preview(preview->preview, &preview->src_rgn);
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preview_redraw(preview);
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}
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GdkCursorType
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preview_set_cursor(Preview_t *preview, GdkCursorType cursor_type)
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{
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GdkCursorType prev_cursor = preview->cursor;
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GdkCursor *cursor = gdk_cursor_new(cursor_type);
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gdk_window_set_cursor(preview->window->window, cursor);
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gdk_cursor_unref(cursor);
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gdk_flush();
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preview->cursor = cursor_type;
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return prev_cursor;
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}
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static GtkTargetEntry target_table[] = {
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{"STRING", 0, 1 },
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{"text/plain", 0, 2 }
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};
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static void
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handle_drop(GtkWidget *widget, GdkDragContext *context, gint x, gint y,
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GtkSelectionData *data, guint info, guint time)
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{
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gboolean success = FALSE;
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if (data->length >= 0 && data->format == 8) {
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ObjectList_t *list = get_shapes();
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Object_t *obj;
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x = get_real_coord(x);
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y = get_real_coord(y);
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obj = object_list_find(list, x, y);
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if (obj && !obj->locked) {
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command_list_add(edit_object_command_new(obj));
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object_set_url(obj, data->data);
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object_emit_update_signal(obj);
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success = TRUE;
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}
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}
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gtk_drag_finish(context, success, FALSE, time);
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}
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Preview_t*
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make_preview(GimpDrawable *drawable)
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{
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Preview_t *data = g_new(Preview_t, 1);
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GtkWidget *preview;
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GtkWidget *window;
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GtkWidget *button, *arrow;
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GtkWidget *ruler;
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GtkWidget *frame;
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GtkWidget *table;
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gint width, height;
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data->drawable = drawable;
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data->preview = preview = gtk_preview_new(GTK_PREVIEW_COLOR);
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gtk_object_set_user_data(GTK_OBJECT(preview), data);
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gtk_widget_set_events(GTK_WIDGET(preview), PREVIEW_MASK);
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data->exp_id = gtk_signal_connect_after(GTK_OBJECT(preview), "expose_event",
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(GtkSignalFunc) preview_expose,
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data);
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/* Handle drop of links in preview widget */
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gtk_drag_dest_set(preview, GTK_DEST_DEFAULT_ALL, target_table,
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2, GDK_ACTION_COPY);
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gtk_signal_connect(GTK_OBJECT(preview), "drag_data_received",
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GTK_SIGNAL_FUNC(handle_drop), NULL);
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data->width = gimp_drawable_width(drawable->drawable_id);
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data->height = gimp_drawable_height(drawable->drawable_id);
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gtk_preview_size(GTK_PREVIEW(preview), data->width, data->height);
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data->window = window = gtk_scrolled_window_new(NULL, NULL);
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width = (data->width > 600) ? 600 : data->width;
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height = (data->height > 400) ? 400 : data->height;
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gtk_widget_set_usize(window, width, height);
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gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(window),
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GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
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gtk_widget_show(window);
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data->frame = frame = gtk_frame_new(NULL);
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gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(window), frame);
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gtk_frame_set_shadow_type(GTK_FRAME(frame), GTK_SHADOW_IN);
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/* The main table */
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table = gtk_table_new(3, 3, FALSE);
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gtk_table_attach(GTK_TABLE(table), preview, 1, 2, 1, 2, GTK_FILL, GTK_FILL,
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0, 0);
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gtk_container_add(GTK_CONTAINER(frame), table);
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/* Create button with arrow */
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button = gtk_button_new();
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GTK_WIDGET_UNSET_FLAGS(button, GTK_CAN_FOCUS);
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gtk_table_attach(GTK_TABLE(table), button, 0, 1, 0, 1, GTK_FILL, GTK_FILL,
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0, 0);
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gtk_widget_set_events(button,
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GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
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gtk_signal_connect(GTK_OBJECT(button), "button_press_event",
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(GtkSignalFunc) arrow_cb, NULL);
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gtk_widget_show(button);
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arrow = gtk_arrow_new(GTK_ARROW_RIGHT, GTK_SHADOW_OUT);
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gtk_container_add(GTK_CONTAINER(button), arrow);
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gtk_widget_show(arrow);
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/* Create horizontal ruler */
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data->hruler = ruler = gtk_hruler_new();
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gtk_ruler_set_range(GTK_RULER(ruler), 0, data->width, 0, PREVIEW_SIZE);
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gtk_signal_connect_object(GTK_OBJECT(preview), "motion_notify_event",
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(GtkSignalFunc) GTK_WIDGET_GET_CLASS(ruler)->motion_notify_event,
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GTK_OBJECT(ruler));
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gtk_table_attach(GTK_TABLE(table), ruler, 1, 2, 0, 1, GTK_FILL, GTK_FILL,
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0, 0);
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gtk_widget_show(ruler);
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/* Create vertical ruler */
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data->vruler = ruler = gtk_vruler_new();
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gtk_ruler_set_range(GTK_RULER(ruler), 0, data->height, 0, PREVIEW_SIZE);
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gtk_signal_connect_object(GTK_OBJECT(preview), "motion_notify_event",
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(GtkSignalFunc) GTK_WIDGET_GET_CLASS (ruler)->motion_notify_event,
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GTK_OBJECT(ruler));
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gtk_table_attach(GTK_TABLE(table), ruler, 0, 1, 1, 2, GTK_FILL, GTK_FILL,
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0, 0);
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gtk_widget_show(ruler);
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gimp_pixel_rgn_init(&data->src_rgn, drawable, 0, 0, data->width,
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data->height, FALSE, FALSE);
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render_preview(preview, &data->src_rgn);
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gtk_widget_show(preview);
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|
|
gtk_widget_show(frame);
|
|
gtk_widget_show(table);
|
|
|
|
return data;
|
|
}
|