mirror of https://github.com/GNOME/gimp.git
542 lines
16 KiB
C
542 lines
16 KiB
C
/*
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* This is a plug-in for GIMP.
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*
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* Generates clickable image maps.
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*
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* Copyright (C) 1998-2005 Maurits Rijk m.rijk@chello.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 3 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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "libgimp/gimp.h"
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#include <libgimp/gimpui.h>
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#include "imap_commands.h"
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#include "imap_grid.h"
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#include "imap_main.h"
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#include "imap_menu.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 Object_t *_tmp_obj;
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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*) g_object_get_data (G_OBJECT (preview), "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(Preview_t *preview_base, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_buffer, *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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GtkWidget *preview = preview_base->preview;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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pwidth = preview_base->widget_width;
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pheight = preview_base->widget_height;
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bpp = srcrgn->bpp;
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src_row = g_new(guchar, dwidth * bpp);
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dest_buffer = g_new(guchar, pwidth * pheight);
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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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dest = dest_buffer;
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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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for (col = 0; col < pwidth; col++) {
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guchar *src;
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src = &src_row[src_col[col]];
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*dest++ = *src;
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}
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}
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gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
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0, 0, pwidth, pheight,
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GIMP_GRAY_IMAGE,
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dest_buffer,
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pwidth);
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g_free(src_col);
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g_free(src_row);
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g_free(dest_buffer);
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}
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static void
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render_indexed_image(Preview_t *preview_base, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_buffer, *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, *color;
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gint ncols;
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gboolean gray = get_map_info()->show_gray;
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GtkWidget *preview = preview_base->preview;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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pwidth = preview_base->widget_width;
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pheight = preview_base->widget_height;
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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_colormap (gimp_item_get_image (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_buffer = g_new(guchar, pwidth * pheight * 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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dest = dest_buffer;
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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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for (col = 0; col < pwidth; col++) {
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src = &src_row[src_col[col]];
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color = cmap + 3 * (int)(*src);
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if (gray) {
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guchar avg = (299 * color[0] + 587 * color[1] +
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114 * color[2]) / 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++ = color[0];
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*dest++ = color[1];
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*dest++ = color[2];
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}
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}
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}
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gimp_preview_area_draw(GIMP_PREVIEW_AREA(preview),
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0, 0, pwidth, pheight,
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GIMP_RGB_IMAGE,
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dest_buffer,
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pwidth * 3);
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g_free(src_col);
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g_free(src_row);
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g_free(dest_buffer);
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}
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static void
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render_rgb_image(Preview_t *preview_base, GimpPixelRgn *srcrgn)
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{
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guchar *src_row, *dest_buffer, *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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GtkWidget *preview = preview_base->preview;
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dwidth = srcrgn->w;
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dheight = srcrgn->h;
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pwidth = preview_base->widget_width;
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pheight = preview_base->widget_height;
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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_buffer = g_new(guchar, pwidth * pheight * 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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dest = dest_buffer;
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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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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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}
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gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
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0, 0, pwidth, pheight,
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GIMP_RGB_IMAGE,
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dest_buffer,
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pwidth * 3);
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g_free(src_col);
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g_free(src_row);
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g_free(dest_buffer);
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}
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static void
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render_preview(Preview_t *preview_base, 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_base, 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_base, 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_base, srcrgn);
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break;
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}
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}
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static gboolean
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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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return TRUE;
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}
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static gboolean
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preview_expose(GtkWidget *widget, GdkEventExpose *event)
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{
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cairo_t *cr;
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gint width = preview_get_width (widget);
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gint height = preview_get_height (widget);
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cr = gdk_cairo_create (event->window);
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gdk_cairo_region (cr, event->region);
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cairo_clip (cr);
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cairo_set_line_width (cr, 1.);
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draw_grid (cr, width, height);
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draw_shapes (cr);
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if (_tmp_obj)
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{
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/* this is a bit of a hack */
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gdouble dash = 4.;
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_tmp_obj->selected |= 4;
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cairo_set_source_rgb (cr, 1., 0., 1.);
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cairo_set_dash (cr, &dash, 1, dash);
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object_draw (_tmp_obj, cr);
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}
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cairo_destroy (cr);
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return FALSE;
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}
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void
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preview_set_tmp_obj (Object_t *obj)
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{
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_tmp_obj = obj;
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}
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void
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preview_unset_tmp_obj (Object_t *obj)
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{
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if (_tmp_obj == obj) _tmp_obj = 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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preview->widget_width = preview->width * zoom_factor;
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preview->widget_height = preview->height * zoom_factor;
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gtk_widget_set_size_request (preview->preview, preview->widget_width,
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preview->widget_height);
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gtk_widget_queue_resize(preview->window);
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render_preview(preview, &preview->src_rgn);
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preview_redraw();
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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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GdkDisplay *display = gtk_widget_get_display (preview->window);
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GdkCursor *cursor = gdk_cursor_new_for_display (display,
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cursor_type);
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gdk_window_set_cursor(gtk_widget_get_window (preview->window), cursor);
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gdk_cursor_unref(cursor);
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preview->cursor = cursor_type;
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return prev_cursor;
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}
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static const GtkTargetEntry target_table[] =
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{
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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 (gtk_selection_data_get_length (data) >= 0 &&
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gtk_selection_data_get_format (data) == 8)
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{
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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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{
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command_list_add(edit_object_command_new(obj));
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object_set_url(obj, (const gchar *) gtk_selection_data_get_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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static void
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preview_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation,
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gpointer preview_void)
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{
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Preview_t *preview = preview_void;
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render_preview (preview, &preview->src_rgn);
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}
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static void
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scroll_adj_changed (GtkAdjustment *adj,
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GimpRuler *ruler)
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{
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gimp_ruler_set_range (ruler,
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gtk_adjustment_get_value (adj),
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gtk_adjustment_get_value (adj) +
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gtk_adjustment_get_page_size (adj),
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gtk_adjustment_get_upper (adj));
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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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GtkAdjustment *hadj;
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GtkAdjustment *vadj;
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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 *table;
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GtkWidget *scrollbar;
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gint width, height;
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data->drawable = drawable;
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data->preview = preview = gimp_preview_area_new ();
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g_object_set_data (G_OBJECT (preview), "preview", data);
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gtk_widget_set_events(GTK_WIDGET(preview), PREVIEW_MASK);
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g_signal_connect_after(preview, "expose-event",
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G_CALLBACK(preview_expose), data);
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g_signal_connect (preview, "size-allocate",
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G_CALLBACK (preview_size_allocate), (gpointer)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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g_signal_connect(preview, "drag-data-received",
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G_CALLBACK(handle_drop), NULL);
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data->widget_width = data->width =
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gimp_drawable_width(drawable->drawable_id);
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data->widget_height = data->height =
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gimp_drawable_height(drawable->drawable_id);
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gtk_widget_set_size_request (preview, data->widget_width,
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data->widget_height);
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/* The main table */
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data->window = table = gtk_table_new(3, 3, FALSE);
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gtk_table_set_col_spacings (GTK_TABLE (table), 1);
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gtk_table_set_row_spacings (GTK_TABLE (table), 1);
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/* Create button with arrow */
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button = gtk_button_new();
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gtk_widget_set_can_focus (button, FALSE);
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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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g_signal_connect(button, "button-press-event",
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G_CALLBACK(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 = gimp_ruler_new (GTK_ORIENTATION_HORIZONTAL);
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g_signal_connect_swapped(preview, "motion-notify-event",
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G_CALLBACK(GTK_WIDGET_GET_CLASS(ruler)->motion_notify_event),
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ruler);
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gtk_table_attach(GTK_TABLE(table), ruler, 1, 2, 0, 1,
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GTK_EXPAND | GTK_SHRINK | GTK_FILL, GTK_FILL, 0, 0);
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gtk_widget_show(ruler);
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/* Create vertical ruler */
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data->vruler = ruler = gimp_ruler_new (GTK_ORIENTATION_VERTICAL);
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g_signal_connect_swapped(preview, "motion-notify-event",
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G_CALLBACK(GTK_WIDGET_GET_CLASS(ruler)->motion_notify_event),
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ruler);
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gtk_table_attach(GTK_TABLE(table), ruler, 0, 1, 1, 2,
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GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
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gtk_widget_show(ruler);
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window = gtk_scrolled_window_new (NULL, NULL);
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gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(window),
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GTK_POLICY_NEVER, GTK_POLICY_NEVER);
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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_size_request(window, width, height);
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gtk_table_attach(GTK_TABLE(table), window, 1, 2, 1, 2, GTK_FILL, GTK_FILL,
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0, 0);
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gtk_widget_show(window);
|
|
|
|
hadj = gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (window));
|
|
|
|
g_signal_connect (hadj, "changed",
|
|
G_CALLBACK (scroll_adj_changed),
|
|
data->hruler);
|
|
g_signal_connect (hadj, "value-changed",
|
|
G_CALLBACK (scroll_adj_changed),
|
|
data->hruler);
|
|
|
|
vadj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (window));
|
|
|
|
g_signal_connect (vadj, "changed",
|
|
G_CALLBACK (scroll_adj_changed),
|
|
data->vruler);
|
|
g_signal_connect (vadj, "value-changed",
|
|
G_CALLBACK (scroll_adj_changed),
|
|
data->vruler);
|
|
|
|
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW(window), preview);
|
|
|
|
scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadj);
|
|
gtk_table_attach(GTK_TABLE(table), scrollbar, 1, 2, 2, 3,
|
|
GTK_FILL | GTK_SHRINK, GTK_FILL | GTK_SHRINK, 0, 0);
|
|
gtk_widget_show (scrollbar);
|
|
|
|
scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadj);
|
|
gtk_table_attach(GTK_TABLE(table), scrollbar, 2, 3, 1, 2,
|
|
GTK_FILL | GTK_SHRINK, GTK_FILL | GTK_SHRINK, 0, 0);
|
|
gtk_widget_show (scrollbar);
|
|
|
|
gtk_widget_show (preview);
|
|
|
|
gimp_pixel_rgn_init(&data->src_rgn, drawable, 0, 0, data->width,
|
|
data->height, FALSE, FALSE);
|
|
render_preview(data, &data->src_rgn);
|
|
|
|
gtk_widget_show(table);
|
|
|
|
return data;
|
|
}
|