/* xscreensaver, Copyright (c) 2014-2015 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
/* Compatibility layer using XDrawString, XDrawString16() or Xutf8DrawString().
This layer is used by X11 systems without Xft, and by MacOS / iOS.
*/
#ifndef __XSCREENSAVER_XFT_H__
#define __XSCREENSAVER_XFT_H__
/* The XGlyphInfo field names and values are, of course, arbitrarily
different from XCharStruct for no sensible reason. These macros
translate between them.
*/
# define XGlyphInfo_to_XCharStruct(G,C) do { \
(C).lbearing = -(G).x; \
(C).rbearing = (G).width - (G).x; \
(C).ascent = (G).y; \
(C).descent = (G).height - (G).y; \
(C).width = (G).xOff; \
} while (0)
# define XCharStruct_to_XGlyphInfo(C,G) do { \
(G).x = -(C).lbearing; \
(G).y = (C).ascent; \
(G).xOff = (C).width; \
(G).yOff = 0; \
(G).width = (C).rbearing - (C).lbearing; \
(G).height = (C).ascent + (C).descent; \
} while (0)
/* Xutf8TextExtents returns a bounding box in an XRectangle, which
conveniently interprets everything in the opposite direction
from XGlyphInfo!
*/
# define XCharStruct_to_XmbRectangle(C,R) do { \
(R).x = (C).lbearing; \
(R).y = -(C).ascent; \
(R).width = (C).rbearing - (C).lbearing; \
(R).height = (C).ascent + (C).descent; \
} while (0)
# define XmbRectangle_to_XCharStruct(R,C,ADV) do { \
(C).lbearing = (R).x; \
(C).rbearing = (R).width + (R).x; \
(C).ascent = -(R).y; \
(C).descent = (R).height + (R).y; \
(C).width = (ADV); \
} while (0)
# ifdef HAVE_XFT
# include <X11/Xft/Xft.h>
# else /* !HAVE_XFT -- the rest of the file */
# ifdef HAVE_COCOA
# include "jwxyz.h"
#elif defined(HAVE_ANDROID)
# include "jwxyz.h"
# else
# include <X11/Xlib.h>
# endif
/* This doesn't seem to work right under X11. See comment in xft.c. */
# ifndef HAVE_COCOA
# undef HAVE_XUTF8DRAWSTRING
# endif
# ifndef _Xconst
# define _Xconst const
# endif
typedef struct _XGlyphInfo {
unsigned short width, height; /* bounding box of the ink */
short x, y; /* distance from upper left of bbox to glyph origin. */
short xOff, yOff; /* distance from glyph origin to next origin. */
} XGlyphInfo;
typedef struct _XftFont {
XFontStruct *xfont;
# ifdef HAVE_XUTF8DRAWSTRING
XFontSet fontset;
# endif
char *name;
int ascent;
int descent;
int height;
} XftFont;
typedef struct {
unsigned short red;
unsigned short green;
unsigned short blue;
unsigned short alpha;
} XRenderColor;
typedef struct _XftColor {
unsigned long pixel;
XRenderColor color;
} XftColor;
typedef struct _XftDraw XftDraw;
typedef unsigned char FcChar8;
XftFont *XftFontOpenXlfd (Display *dpy, int screen, _Xconst char *xlfd);
#define XftFontOpenName XftFontOpenXlfd
void XftFontClose (Display *dpy, XftFont *font);
Bool XftColorAllocName (Display *dpy,
_Xconst Visual *visual,
Colormap cmap,
_Xconst char *name,
XftColor *result);
Bool XftColorAllocValue (Display *dpy,
_Xconst Visual *visual,
Colormap cmap,
_Xconst XRenderColor *color,
XftColor *result);
void XftColorFree (Display *dpy,
Visual *visual,
Colormap cmap,
XftColor *color);
XftDraw *XftDrawCreate (Display *dpy,
Drawable drawable,
Visual *visual,
Colormap colormap);
void XftDrawDestroy (XftDraw *draw);
void
XftTextExtentsUtf8 (Display *dpy,
XftFont *pub,
_Xconst FcChar8 *string,
int len,
XGlyphInfo *extents);
void
XftDrawStringUtf8 (XftDraw *draw,
_Xconst XftColor *color,
XftFont *pub,
int x,
int y,
_Xconst FcChar8 *string,
int len);
# endif /* !HAVE_XFT */
#endif /* __XSCREENSAVER_XFT_H__ */
