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0a5fadee17b51ba7d748113c43f4133eed01d0f3
gimp/app/gdisplay.h
Sven Neumann 630fe55d17 Cleaned up after Adam ;-) 
* app/edit_selection.c: Finally moved selections snap to the
   guides again. Layer moves are slightly faster than before, if no
   guides are present.

 * app/gdisplay.c
 * app/gdisplay.h
 * app/gdisplayP.h: Use doubles for snap_to_point. Less rounding
   makes the result much better on low resolution. If it snaps, the
   result should be exactly the guide in almost all cases now. Only
   at very low resolutions, you may end up with an error of 1 pixel.
   Some code cleanup while I was on it... Fixes bug #2353.


--Sven
2000-02-10 14:23:11 +00:00

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/* The GIMP -- an 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 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __GDISPLAY_H__
#define __GDISPLAY_H__
#include <gtk/gtk.h>
#include "gimage.h"
#include "info_dialog.h"
#include "selection.h"
#include "gdisplayF.h"
/*
* Global variables
*
*/
/* some useful macros */
/* unpacking the user scale level (char) */
#define SCALESRC(g) (g->scale & 0x00ff)
#define SCALEDEST(g) (g->scale >> 8)
/* finding the effective screen resolution (double) */
#define SCREEN_XRES(g) (g->dot_for_dot? g->gimage->xresolution : monitor_xres)
#define SCREEN_YRES(g) (g->dot_for_dot? g->gimage->yresolution : monitor_yres)
/* calculate scale factors (double) */
#define SCALEFACTOR_X(g) ((SCALEDEST(g) * SCREEN_XRES(g)) / \
(SCALESRC(g) * g->gimage->xresolution))
#define SCALEFACTOR_Y(g) ((SCALEDEST(g) * SCREEN_YRES(g)) / \
(SCALESRC(g) * g->gimage->yresolution))
/* scale values */
#define SCALEX(g,x) ((int)(x * SCALEFACTOR_X(g)))
#define SCALEY(g,y) ((int)(y * SCALEFACTOR_Y(g)))
/* unscale values */
#define UNSCALEX(g,x) ((int)(x / SCALEFACTOR_X(g)))
#define UNSCALEY(g,y) ((int)(y / SCALEFACTOR_Y(g)))
/* (and float-returning versions) */
#define FUNSCALEX(g,x) ((x / SCALEFACTOR_X(g)))
#define FUNSCALEY(g,y) ((y / SCALEFACTOR_Y(g)))
#define LOWPASS(x) ((x>0) ? x : 0)
/* #define HIGHPASS(x,y) ((x>y) ? y : x) */ /* unused - == MIN */
/* maximal width of the string holding the cursor-coordinates for
the status line */
#define CURSOR_STR_LENGTH 256
/* maximal length of the format string for the cursor-coordinates */
#define CURSOR_FORMAT_LENGTH 32
typedef struct _IdleRenderStruct
{
gint width;
gint height;
gint x;
gint y;
gint basex;
gint basey;
guint idleid;
/*guint handlerid;*/
gboolean active;
GSList *update_areas; /* flushed update areas */
} IdleRenderStruct;
struct _GDisplay
{
gint ID; /* unique identifier for this gdisplay */
GtkWidget *shell; /* shell widget for this gdisplay */
GtkWidget *canvas; /* canvas widget for this gdisplay */
GtkWidget *hsb, *vsb; /* widgets for scroll bars */
GtkWidget *qmaskoff, *qmaskon; /* widgets for qmask buttons */
GtkWidget *hrule, *vrule; /* widgets for rulers */
GtkWidget *origin; /* widgets for rulers */
GtkWidget *popup; /* widget for popup menu */
GtkWidget *statusarea; /* hbox holding the statusbar and stuff */
GtkWidget *statusbar; /* widget for statusbar */
GtkWidget *progressbar; /* widget for progressbar */
GtkWidget *cursor_label; /* widget for cursor position */
gchar cursor_format_str [CURSOR_FORMAT_LENGTH]; /* we need a variable format
* string because different
* units have different number
* of decimals */
GtkWidget *cancelbutton; /* widget for cancel button */
guint progressid; /* id of statusbar message for progress */
InfoDialog *window_info_dialog; /* dialog box for image information */
InfoDialog *window_nav_dialog; /* dialog box for image navigation */
GtkWidget *nav_popup; /* widget for the popup navigation window */
gint color_type; /* is this an RGB or GRAY colormap */
GtkAdjustment *hsbdata; /* horizontal data information */
GtkAdjustment *vsbdata; /* vertical data information */
GimpImage *gimage; /* pointer to the associated gimage struct */
gint instance; /* the instance # of this gdisplay as */
/* taken from the gimage at creation */
gint depth; /* depth of our drawables */
gint disp_width; /* width of drawing area in the window */
gint disp_height; /* height of drawing area in the window */
gint disp_xoffset;
gint disp_yoffset;
gint offset_x; /* offset of display image into raw image */
gint offset_y;
gint scale; /* scale factor from original raw image */
gboolean dot_for_dot; /* is monitor resolution being ignored? */
gboolean draw_guides; /* should the guides be drawn? */
gboolean snap_to_guides; /* should the guides be snapped to? */
Selection *select; /* Selection object */
GdkGC *scroll_gc; /* GC for scrolling */
GSList *update_areas; /* Update areas list */
GSList *display_areas; /* Display areas list */
gint current_cursor; /* Currently installed cursor */
GdkCursorType override_cursor; /* Overriding cursor (ie. hourglass) */
gboolean draw_cursor; /* should we draw software cursor ? */
gboolean using_override_cursor; /* is the cursor overridden? (ie. hourglass)*/
gint cursor_x; /* software cursor X value */
gint cursor_y; /* software cursor Y value */
gboolean proximity; /* is a device in proximity of gdisplay ? */
gboolean have_cursor; /* is cursor currently drawn ? */
IdleRenderStruct idle_render; /* state of this gdisplay's render thread */
GList *cd_list; /* color display conversion stuff */
GtkWidget *cd_ui; /* color display filter dialog */
};
/* member function declarations */
GDisplay * gdisplay_new (GimpImage *, guint);
void gdisplay_reconnect (GDisplay *, GimpImage *);
void gdisplay_remove_and_delete (GDisplay *);
int gdisplay_mask_value (GDisplay *, gint, gint);
int gdisplay_mask_bounds (GDisplay *, gint *, gint *, gint *, gint *);
void gdisplay_transform_coords (GDisplay *, gint, gint, gint *, gint *, gint);
void gdisplay_untransform_coords (GDisplay *, gint, gint, gint *, gint *,
gboolean, gboolean);
void gdisplay_transform_coords_f (GDisplay *, gdouble, gdouble,
gdouble *, gdouble *, gboolean);
void gdisplay_untransform_coords_f (GDisplay *, gdouble, gdouble,
gdouble *, gdouble *, gboolean);
void gdisplay_install_tool_cursor (GDisplay *, GdkCursorType);
void gdisplay_install_gimp_tool_cursor (GDisplay *, gint);
void gdisplay_remove_tool_cursor (GDisplay *);
void gdisplay_install_override_cursor(GDisplay *, GdkCursorType);
void gdisplay_remove_override_cursor (GDisplay *);
void gdisplay_set_menu_sensitivity (GDisplay *);
void gdisplay_expose_area (GDisplay *, gint, gint, gint, gint);
void gdisplay_expose_guide (GDisplay *, Guide *);
void gdisplay_expose_full (GDisplay *);
void gdisplay_flush (GDisplay *);
void gdisplay_flush_now (GDisplay *);
void gdisplays_finish_draw (void);
void gdisplay_draw_guides (GDisplay *);
void gdisplay_draw_guide (GDisplay *, Guide *, gboolean);
Guide* gdisplay_find_guide (GDisplay *, gdouble, double);
gboolean gdisplay_snap_point (GDisplay *, gdouble, gdouble,
gdouble *, gdouble *);
void gdisplay_snap_rectangle (GDisplay *, gdouble, gdouble, gdouble, gdouble,
gdouble *, gdouble *);
void gdisplay_update_cursor (GDisplay *, gint, gint);
void gdisplay_set_dot_for_dot (GDisplay *, gboolean);
void gdisplay_resize_cursor_label (GDisplay *);
GDisplay * gdisplays_check_valid (GDisplay *, GimpImage *);
/* function declarations */
GDisplay * gdisplay_active (void);
GDisplay * gdisplay_get_ID (gint);
void gdisplay_update_title (GDisplay*);
void gdisplays_update_title (GimpImage*);
void gdisplays_resize_cursor_label (GimpImage*);
void gdisplays_setup_scale (GimpImage*);
void gdisplays_update_area (GimpImage*, gint, gint, gint, gint);
void gdisplays_expose_guides (GimpImage*);
void gdisplays_expose_guide (GimpImage*, Guide *);
void gdisplays_update_full (GimpImage*);
void gdisplays_shrink_wrap (GimpImage*);
void gdisplays_expose_full (void);
void gdisplays_selection_visibility (GimpImage*, SelectionControl);
gboolean gdisplays_dirty (void);
void gdisplays_delete (void);
void gdisplays_flush (void);
void gdisplays_flush_now (void);
void gdisplay_flush_displays_only (GDisplay *gdisp); /* no rerender! */
void gdisplays_nav_preview_resized (void);
void gdisplays_foreach (GFunc func, gpointer user_data);
#endif /* __GDISPLAY_H__ */
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