draw.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <X11/Xlib.h>
   5
   6 #include "draw.h"
   7 #include "util.h"
   8
   9 Draw *
  10 draw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
  11         Draw *draw = (Draw *)calloc(1, sizeof(Draw));
  12         draw->dpy = dpy;
  13         draw->screen = screen;
  14         draw->win = win;
  15         draw->w = w;
  16         draw->h = h;
  17         draw->drawable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
  18         draw->gc = XCreateGC(dpy, win, 0, NULL);
  19         XSetLineAttributes(dpy, draw->gc, 1, LineSolid, CapButt, JoinMiter);
  20         return draw;
  21 }
  22
  23 void
  24 draw_resize(Draw *draw, unsigned int w, unsigned int h) {
  25         if(!draw)
  26                 return;
  27         draw->w = w;
  28         draw->h = h;
  29         XFreePixmap(draw->dpy, draw->drawable);
  30         draw->drawable = XCreatePixmap(draw->dpy, draw->win, w, h, DefaultDepth(draw->dpy, draw->screen));
  31 }
  32
  33 void
  34 draw_free(Draw *draw) {
  35         XFreePixmap(draw->dpy, draw->drawable);
  36         XFreeGC(draw->dpy, draw->gc);
  37         free(draw);
  38 }
  39
  40 Fnt *
  41 draw_font_create(Draw *draw, const char *fontname) {
  42         Fnt *font;
  43         char *def, **missing;
  44         int n;
  45
  46         if(!draw)
  47                 return NULL;
  48         font = (Fnt *)calloc(1, sizeof(Fnt));
  49         font->set = XCreateFontSet(draw->dpy, fontname, &missing, &n, &def);
  50         if(missing) {
  51                 while(n--)
  52                         fprintf(stderr, "draw: missing fontset: %s\n", missing[n]);
  53                 XFreeStringList(missing);
  54         }
  55         if(font->set) {
  56                 XFontStruct **xfonts;
  57                 char **font_names;
  58
  59                 XExtentsOfFontSet(font->set);
  60                 n = XFontsOfFontSet(font->set, &xfonts, &font_names);
  61                 while(n--) {
  62                         font->ascent = MAX(font->ascent, (*xfonts)->ascent);
  63                         font->descent = MAX(font->descent,(*xfonts)->descent);
  64                         xfonts++;
  65                 }
  66         }
  67         else {
  68                 if(!(font->xfont = XLoadQueryFont(draw->dpy, fontname))
  69                 && !(font->xfont = XLoadQueryFont(draw->dpy, "fixed")))
  70                         die("error, cannot load font: '%s'\n", fontname);
  71                 font->ascent = font->xfont->ascent;
  72                 font->descent = font->xfont->descent;
  73         }
  74         font->h = font->ascent + font->descent;
  75         return font;
  76 }
  77
  78 void
  79 draw_font_free(Draw *draw, Fnt *font) {
  80         if(!draw || !font)
  81                 return;
  82         if(font->set)
  83                 XFreeFontSet(draw->dpy, font->set);
  84         else
  85                 XFreeFont(draw->dpy, font->xfont);
  86         free(font);
  87 }
  88
  89 Col *
  90 draw_col_create(Draw *draw, const char *colname) {
  91         Col *col = (Col *)calloc(1, sizeof(Col));
  92         Colormap cmap = DefaultColormap(draw->dpy, draw->screen);
  93         XColor color;
  94
  95         if(!XAllocNamedColor(draw->dpy, cmap, colname, &color, &color))
  96                 die("error, cannot allocate color '%s'\n", colname);
  97         col->rgb = color.pixel;
  98         return col;
  99 }
 100
 101 void
 102 draw_col_free(Draw *draw, Col *col) {
 103         if(!col)
 104                 return;
 105         free(col);
 106 }
 107
 108 void
 109 draw_setfont(Draw *draw, Fnt *font) {
 110         if(!draw || !font)
 111                 return;
 112         draw->font = font;
 113 }
 114
 115 void
 116 draw_setfg(Draw *draw, Col *col) {
 117         if(!draw || !col)
 118                 return;
 119         draw->fg = col;
 120 }
 121
 122 void
 123 draw_setbg(Draw *draw, Col *col) {
 124         if(!draw || !col)
 125                 return;
 126         draw->bg = col;
 127 }
 128
 129 void
 130 draw_rect(Draw *draw, int x, int y, unsigned int w, unsigned int h) {
 131         if(!draw)
 132                 return;
 133         /* TODO: draw the rectangle */
 134 }
 135
 136 void
 137 draw_text(Draw *draw, int x, int y, const char *text) {
 138         if(!draw)
 139                 return;
 140         /* TODO: draw the text */
 141 }
 142
 143 void
 144 draw_map(Draw *draw, int x, int y, unsigned int w, unsigned int h) {
 145         if(!draw)
 146                 return;
 147         /* TODO: map the draw contents in the region */
 148 }
 149
 150 void
 151 draw_getextents(Draw *draw, const char *text, TextExtents *extents) {
 152         if(!draw || !extents)
 153                 return;
 154         /* TODO: get extents */
 155 }