common/draw.h

   1 /*
   2  * draw.h - draw functions header
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #ifndef AWESOME_COMMON_DRAW_H
  23 #define AWESOME_COMMON_DRAW_H
  24
  25 #include <cairo.h>
  26 #include <X11/Xlib.h>
  27 #include <X11/Xft/Xft.h>
  28
  29 #include "common/util.h"
  30 #include "common/list.h"
  31
  32 typedef enum
  33 {
  34     AlignLeft,
  35     AlignRight,
  36     AlignFlex,
  37     AlignCenter
  38 } Alignment;
  39
  40 typedef struct Area Area;
  41 struct Area
  42 {
  43     /** Co-ords of upper left corner */
  44     int x;
  45     int y;
  46     int width;
  47     int height;
  48     Area *next;
  49 };
  50
  51 DO_SLIST(Area, area, p_delete);
  52
  53 #define AREA_LEFT(a)    ((a).x)
  54 #define AREA_TOP(a)     ((a).y)
  55 #define AREA_RIGHT(a)   ((a).x + (a).width)
  56 #define AREA_BOTTOM(a)    ((a).y + (a).height)
  57
  58 static inline Bool
  59 area_intersect_area(Area a, Area b)
  60 {
  61     return (b.x < a.x + a.width
  62             && b.x + b.width > a.x
  63             && b.y < a.y + a.height
  64             && b.y + b.height > a.y);
  65 }
  66
  67 static inline Area
  68 area_get_intersect_area(Area a, Area b)
  69 {
  70     Area g;
  71
  72     g.x = MAX(a.x, b.x);
  73     g.y = MAX(a.y, b.y);
  74     g.width = MIN(a.x + a.width, b.x + b.width) - g.x;
  75     g.height = MIN(a.y + a.height, b.y + b.height) - g.y;
  76
  77     return g;
  78 }
  79
  80 typedef struct
  81 {
  82     Display *display;
  83     Drawable drawable;
  84     Visual *visual;
  85     int width;
  86     int height;
  87     int phys_screen;
  88     int depth;
  89     cairo_t *cr;
  90     cairo_surface_t *surface;
  91 } DrawCtx;
  92
  93 DrawCtx *draw_context_new(Display *, int, int, int, Drawable);
  94 void draw_context_delete(DrawCtx *);
  95
  96 void draw_text(DrawCtx *, Area, Alignment, int, XftFont *, char *, XColor fg, XColor bg);
  97 void draw_rectangle(DrawCtx *, Area, Bool, XColor);
  98 void draw_rectangle_gradient(DrawCtx *, Area, int, Bool, XColor, XColor);
  99
 100 void draw_graph_setup(DrawCtx *);
 101 void draw_graph(DrawCtx *, int, int, int, int *, int *, int, XColor);
 102 void draw_graph_line(DrawCtx *, int, int, int, int *, int, XColor);
 103
 104 void draw_circle(DrawCtx *, int, int, int, Bool, XColor);
 105 void draw_image(DrawCtx *, int, int, int, const char *);
 106 void draw_image_from_argb_data(DrawCtx *, int, int, int, int, int, unsigned char *);
 107 Area draw_get_image_size(const char *filename);
 108 Drawable draw_rotate(DrawCtx *, int, double, int, int);
 109 unsigned short draw_textwidth(Display *, XftFont *, char *);
 110 Alignment draw_get_align(const char *);
 111 XColor draw_color_new(Display *, int, const char *);
 112
 113 void area_list_remove(Area **, Area *);
 114
 115 #endif
 116 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80