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/* Interface definitions for display code.
Copyright (C) 1985, 1993 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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, or (at your option)
any later version.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Nonzero means last display completed and cursor is really at
cursX, cursY. Zero means it was preempted. */
extern int display_completed;
#ifdef HAVE_X_WINDOWS
#include <X11/Xlib.h>
struct face
{
/* If this is non-zero, it is a GC we can use without modification
to represent this face. */
GC gc;
/* If we have ever called get_cached_face on this face structure,
here is the index in face_vector of the face it returned. It
might not be valid any more, but it's a good place to start
looking; get_cached_face tries to use this to avoid searching
all of face_vector. */
int cached_index;
/* Pixel value for foreground color. */
int foreground;
/* Pixel value for background color. */
int background;
/* Font used for this face. */
XFontStruct *font;
/* Background stipple or bitmap used for this face. */
Pixmap stipple;
/* Pixmap_depth. */
unsigned int pixmap_w, pixmap_h;
/* Whether or not to underline text in this face. */
char underline;
/* Does this face own its resources? (color, font, etcetera)
If this is a face which we computed by combining other faces,
then this is true, and we shouldn't free any of the resources
it refers to; the faces from which it was constructed own it.
On the other hand, if this is a face the user created and
filled in directly, then this is false, and we should free the
resources when we free it. */
char copy;
};
/* Let's stop using this and get rid of it. */
typedef struct face *FACE;
#define NORMAL_FACE ((struct face *) 0)
#define FACE_HAS_GC(f) ((f)->gc)
#define FACE_GC(f) ((f)->gc)
#define FACE_FOREGROUND(f) ((f)->foreground)
#define FACE_BACKGROUND(f) ((f)->background)
#define FACE_FONT(f) ((f)->font)
#define FACE_STIPPLE(f) ((f)->stipple)
#define FACE_UNDERLINE_P(f) ((f)->underline)
#else /* Not X */
typedef int FACE;
#define NORMAL_FACE 0x0
#define HIGHLIGHT_FACE 0x1
#define UNDERLINE_FACE 0x2
#define HIGHLIGHT_UNDERLINE_FACE 0x3
#define FACE_HIGHLIGHT(f) ((f) & 0x1)
#define FACE_UNDERLINE(f) ((f) & 0x2)
#endif /* Not X */
/* This structure is used for the actual display of text on a frame.
There are two instantiations of it: the glyphs currently displayed,
and the glyphs we desire to display. The latter object is generated
from buffers being displayed. */
struct frame_glyphs
{
#ifdef MULTI_FRAME
struct frame *frame; /* Frame these glyphs belong to. */
#endif /* MULTI_FRAME */
int height;
int width;
/* Contents of the frame.
glyphs[V][H] is the glyph at position V, H.
Note that glyphs[V][-1],
glyphs[V][used[V]],
and glyphs[V][frame_width] are always '\0'. */
GLYPH **glyphs;
/* long vector from which the strings in `glyphs' are taken. */
GLYPH *total_contents;
/* When representing a desired frame,
enable[n] == 0 means that line n is same as current frame.
Between updates, all lines should be disabled.
When representing current frame contents,
enable[n] == 0 means that line n is blank. */
char *enable;
/* Everything on line n after column used[n] is considered blank. */
int *used;
/* highlight[n] != 0 iff line n is highlighted. */
char *highlight;
/* Buffer offset of this line's first char. */
int *bufp;
#ifdef HAVE_X_WINDOWS
/* Pixel position of top left corner of line. */
short *top_left_x;
short *top_left_y;
/* Pixel width of line. */
short *pix_width;
/* Pixel height of line. */
short *pix_height;
/* Largest font ascent on this line. */
short *max_ascent;
#endif /* HAVE_X_WINDOWS */
};
extern void get_display_line ();
extern Lisp_Object sit_for ();
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