| 1 | /* xscreensaver, Copyright (c) 2014-2015 Jamie Zawinski <jwz@jwz.org> |
| 2 | * |
| 3 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 4 | * documentation for any purpose is hereby granted without fee, provided that |
| 5 | * the above copyright notice appear in all copies and that both that |
| 6 | * copyright notice and this permission notice appear in supporting |
| 7 | * documentation. No representations are made about the suitability of this |
| 8 | * software for any purpose. It is provided "as is" without express or |
| 9 | * implied warranty. |
| 10 | */ |
| 11 | |
| 12 | /* Compatibility layer using XDrawString, XDrawString16() or Xutf8DrawString(). |
| 13 | This layer is used by X11 systems without Xft, and by MacOS / iOS. |
| 14 | */ |
| 15 | |
| 16 | #ifndef __XSCREENSAVER_XFT_H__ |
| 17 | #define __XSCREENSAVER_XFT_H__ |
| 18 | |
| 19 | /* The XGlyphInfo field names and values are, of course, arbitrarily |
| 20 | different from XCharStruct for no sensible reason. These macros |
| 21 | translate between them. |
| 22 | */ |
| 23 | |
| 24 | # define XGlyphInfo_to_XCharStruct(G,C) do { \ |
| 25 | (C).lbearing = -(G).x; \ |
| 26 | (C).rbearing = (G).width - (G).x; \ |
| 27 | (C).ascent = (G).y; \ |
| 28 | (C).descent = (G).height - (G).y; \ |
| 29 | (C).width = (G).xOff; \ |
| 30 | } while (0) |
| 31 | |
| 32 | # define XCharStruct_to_XGlyphInfo(C,G) do { \ |
| 33 | (G).x = -(C).lbearing; \ |
| 34 | (G).y = (C).ascent; \ |
| 35 | (G).xOff = (C).width; \ |
| 36 | (G).yOff = 0; \ |
| 37 | (G).width = (C).rbearing - (C).lbearing; \ |
| 38 | (G).height = (C).ascent + (C).descent; \ |
| 39 | } while (0) |
| 40 | |
| 41 | /* Xutf8TextExtents returns a bounding box in an XRectangle, which |
| 42 | conveniently interprets everything in the opposite direction |
| 43 | from XGlyphInfo! |
| 44 | */ |
| 45 | # define XCharStruct_to_XmbRectangle(C,R) do { \ |
| 46 | (R).x = (C).lbearing; \ |
| 47 | (R).y = -(C).ascent; \ |
| 48 | (R).width = (C).rbearing - (C).lbearing; \ |
| 49 | (R).height = (C).ascent + (C).descent; \ |
| 50 | } while (0) |
| 51 | |
| 52 | # define XmbRectangle_to_XCharStruct(R,C,ADV) do { \ |
| 53 | (C).lbearing = (R).x; \ |
| 54 | (C).rbearing = (R).width + (R).x; \ |
| 55 | (C).ascent = -(R).y; \ |
| 56 | (C).descent = (R).height + (R).y; \ |
| 57 | (C).width = (ADV); \ |
| 58 | } while (0) |
| 59 | |
| 60 | |
| 61 | # ifdef HAVE_XFT |
| 62 | |
| 63 | # include <X11/Xft/Xft.h> |
| 64 | |
| 65 | # else /* !HAVE_XFT -- the rest of the file */ |
| 66 | |
| 67 | # ifdef HAVE_COCOA |
| 68 | # include "jwxyz.h" |
| 69 | #elif defined(HAVE_ANDROID) |
| 70 | # include "jwxyz.h" |
| 71 | # else |
| 72 | # include <X11/Xlib.h> |
| 73 | # endif |
| 74 | |
| 75 | /* This doesn't seem to work right under X11. See comment in xft.c. */ |
| 76 | # ifndef HAVE_COCOA |
| 77 | # undef HAVE_XUTF8DRAWSTRING |
| 78 | # endif |
| 79 | |
| 80 | |
| 81 | # ifndef _Xconst |
| 82 | # define _Xconst const |
| 83 | # endif |
| 84 | |
| 85 | typedef struct _XGlyphInfo { |
| 86 | unsigned short width, height; /* bounding box of the ink */ |
| 87 | short x, y; /* distance from upper left of bbox to glyph origin. */ |
| 88 | short xOff, yOff; /* distance from glyph origin to next origin. */ |
| 89 | } XGlyphInfo; |
| 90 | |
| 91 | |
| 92 | typedef struct _XftFont { |
| 93 | XFontStruct *xfont; |
| 94 | # ifdef HAVE_XUTF8DRAWSTRING |
| 95 | XFontSet fontset; |
| 96 | # endif |
| 97 | char *name; |
| 98 | int ascent; |
| 99 | int descent; |
| 100 | int height; |
| 101 | } XftFont; |
| 102 | |
| 103 | typedef struct { |
| 104 | unsigned short red; |
| 105 | unsigned short green; |
| 106 | unsigned short blue; |
| 107 | unsigned short alpha; |
| 108 | } XRenderColor; |
| 109 | |
| 110 | typedef struct _XftColor { |
| 111 | unsigned long pixel; |
| 112 | XRenderColor color; |
| 113 | } XftColor; |
| 114 | |
| 115 | typedef struct _XftDraw XftDraw; |
| 116 | |
| 117 | typedef unsigned char FcChar8; |
| 118 | |
| 119 | |
| 120 | XftFont *XftFontOpenXlfd (Display *dpy, int screen, _Xconst char *xlfd); |
| 121 | #define XftFontOpenName XftFontOpenXlfd |
| 122 | |
| 123 | void XftFontClose (Display *dpy, XftFont *font); |
| 124 | |
| 125 | Bool XftColorAllocName (Display *dpy, |
| 126 | _Xconst Visual *visual, |
| 127 | Colormap cmap, |
| 128 | _Xconst char *name, |
| 129 | XftColor *result); |
| 130 | |
| 131 | Bool XftColorAllocValue (Display *dpy, |
| 132 | _Xconst Visual *visual, |
| 133 | Colormap cmap, |
| 134 | _Xconst XRenderColor *color, |
| 135 | XftColor *result); |
| 136 | |
| 137 | void XftColorFree (Display *dpy, |
| 138 | Visual *visual, |
| 139 | Colormap cmap, |
| 140 | XftColor *color); |
| 141 | |
| 142 | XftDraw *XftDrawCreate (Display *dpy, |
| 143 | Drawable drawable, |
| 144 | Visual *visual, |
| 145 | Colormap colormap); |
| 146 | |
| 147 | void XftDrawDestroy (XftDraw *draw); |
| 148 | |
| 149 | void |
| 150 | XftTextExtentsUtf8 (Display *dpy, |
| 151 | XftFont *pub, |
| 152 | _Xconst FcChar8 *string, |
| 153 | int len, |
| 154 | XGlyphInfo *extents); |
| 155 | |
| 156 | void |
| 157 | XftDrawStringUtf8 (XftDraw *draw, |
| 158 | _Xconst XftColor *color, |
| 159 | XftFont *pub, |
| 160 | int x, |
| 161 | int y, |
| 162 | _Xconst FcChar8 *string, |
| 163 | int len); |
| 164 | |
| 165 | # endif /* !HAVE_XFT */ |
| 166 | |
| 167 | #endif /* __XSCREENSAVER_XFT_H__ */ |