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| | /* Canvas support for GNU Emacs.
Copyright (C) 2020 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "lisp.h"
#include "frame.h"
#include "window.h"
#ifdef USE_CAIRO
#include <cairo/cairo.h>
typedef cairo_surface_t *canvas_contents_t;
#else
typedef void *canvas_contents_t;
#endif
struct canvas
{
union vectorlike_header header;
Lisp_Object cnvs_objects;
Lisp_Object window;
Lisp_Object object;
canvas_contents_t canvas;
int width, height;
bool multiple_objects_seen;
bool changed_since_last_redisplay;
} GCALIGNED_STRUCT;
/* Test for canvas pseudovector. */
#define CANVASP(x) PSEUDOVECTORP (x, PVEC_CANVAS)
#define XCANVAS(a) \
(eassert (CANVASP (a)), XUNTAG (a, Lisp_Vectorlike, struct canvas))
#define CHECK_CANVAS(x) CHECK_TYPE (CANVASP (x), Qcanvasp, x)
#define MARK_CANVAS_CHANGED(x) \
(((x)->changed_since_last_redisplay = true), \
(windows_or_buffers_changed = 2), (redisplay ())); \
do \
{ \
if ((x)->multiple_objects_seen || !EQ (selected_window, (x)->window)) \
{ \
Lisp_Object tail, head; \
FOR_EACH_FRAME (tail, head) \
{ \
struct frame *f = XFRAME (head); \
SET_FRAME_GARBAGED (f); \
} \
} \
} \
while (false)
extern Lisp_Object
make_canvas (int width, int height);
extern canvas_contents_t
make_canvas_contents (int width, int height);
extern void
destroy_canvas_contents (canvas_contents_t contents);
extern void
syms_of_canvas (void);
extern void
canvas_end_redisplay (struct window *w,
struct glyph_matrix *matrix);
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