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/* Interface definitions for display code.
Copyright (C) 1985, 1992 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 don't assume anything about current
contents of actual terminal frame */
extern int frame_garbaged;
/* 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
struct run
{
int begin_run;
int len;
int face_code; /* Also handles underlining. */
};
#endif
/* 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.
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
int *nruns; /* N runs of differently displayed text. */
struct run **face_list;
short *top_left_x; /* Pixel position of top left corner */
short *top_left_y;
short *pix_width; /* Pixel width of line. */
short *pix_height; /* Pixel height of line. */
#endif /* HAVE_X_WINDOWS */
};
#if 0
#define LINE_HEIGHT(s,n) (current_glyphs->pix_height[n])
#define LINE_WIDTH(s,n) (current_glyphs->pix_width[n])
#endif
#define LINE_HEIGHT(s,n) (FONT_HEIGHT((s)->display.x->font))
#define LINE_WIDTH(s,n) (FONT_HEIGHT((s)->display.x->font) \
* FRAME_CURRENT_GLYPHS(s)->enable[(n)])
extern void get_display_line ();
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