173 lines
5.3 KiB
C
173 lines
5.3 KiB
C
/*
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* draw.c - draw functions
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*
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* Copyright © 2007 Julien Danjou <julien@danjou.info>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <cairo.h>
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#include <cairo-ft.h>
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#include <cairo-xlib.h>
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#include <math.h>
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#include "layout.h"
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#include "util.h"
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#include "draw.h"
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void
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drawtext(Display *disp, int screen, int x, int y, int w, int h, Drawable drawable, int dw, int dh, XftFont *font, const char *text, XColor color[ColLast])
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{
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int nw = 0;
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static char buf[256];
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size_t len, olen;
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cairo_font_face_t *font_face;
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cairo_surface_t *surface;
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cairo_t *cr;
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drawrectangle(disp, screen, x, y, w, h, drawable, dw, dh, True, color[ColBG]);
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if(!a_strlen(text))
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return;
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surface = cairo_xlib_surface_create(disp, drawable, DefaultVisual(disp, screen), dw, dh);
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cr = cairo_create(surface);
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font_face = cairo_ft_font_face_create_for_pattern(font->pattern);
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cairo_set_font_face(cr, font_face);
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cairo_set_font_size(cr, font->height);
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cairo_set_source_rgb(cr, color[ColFG].red / 65535.0, color[ColFG].green / 65535.0, color[ColFG].blue / 65535.0);
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olen = len = a_strlen(text);
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if(len >= sizeof(buf))
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len = sizeof(buf) - 1;
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memcpy(buf, text, len);
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buf[len] = 0;
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while(len && (nw = textwidth(disp, font, buf)) > w)
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buf[--len] = 0;
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if(nw > w)
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return; /* too long */
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if(len < olen)
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{
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if(len > 1)
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buf[len - 1] = '.';
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if(len > 2)
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buf[len - 2] = '.';
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if(len > 3)
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buf[len - 3] = '.';
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}
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cairo_move_to(cr, x + font->height / 2, y + font->ascent + (dh - font->height) / 2);
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cairo_show_text(cr, buf);
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cairo_font_face_destroy(font_face);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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void
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drawrectangle(Display *disp, int screen, int x, int y, int w, int h, Drawable drawable, int dw, int dh, Bool filled, XColor color)
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{
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cairo_surface_t *surface;
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cairo_t *cr;
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surface = cairo_xlib_surface_create(disp, drawable, DefaultVisual(disp, screen), dw, dh);
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cr = cairo_create (surface);
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cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
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cairo_set_line_width(cr, 1.0);
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cairo_set_source_rgb(cr, color.red / 65535.0, color.green / 65535.0, color.blue / 65535.0);
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if(filled)
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{
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cairo_rectangle(cr, x, y, w + 1, h + 1);
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cairo_fill(cr);
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}
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else
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cairo_rectangle(cr, x + 1, y, w, h);
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cairo_stroke(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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void
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drawcircle(Display *disp, int screen, int x, int y, int r, Drawable drawable, int dw, int dh, Bool filled, XColor color)
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{
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cairo_surface_t *surface;
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cairo_t *cr;
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surface = cairo_xlib_surface_create(disp, drawable, DefaultVisual(disp, screen), dw, dh);
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cr = cairo_create (surface);
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cairo_set_line_width(cr, 1.0);
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cairo_set_source_rgb(cr, color.red / 65535.0, color.green / 65535.0, color.blue / 65535.0);
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if(filled)
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{
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cairo_arc (cr, x + r, y + r, r, 0, 2 * M_PI);
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cairo_fill(cr);
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}
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else
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cairo_arc (cr, x + r, y + r, r - 1, 0, 2 * M_PI);
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cairo_stroke(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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void
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draw_rotate(Display *disp, int screen, Drawable drawable, int dw, int dh, double angle, int tx, int ty)
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{
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cairo_surface_t *surface, *source;
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cairo_t *cr;
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surface = cairo_xlib_surface_create(disp, drawable, DefaultVisual(disp, screen), dw, dw);
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source = cairo_xlib_surface_create(disp, drawable, DefaultVisual(disp, screen), dw, dw);
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cr = cairo_create (surface);
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cairo_rotate(cr, angle);
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cairo_translate(cr, tx, ty);
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cairo_set_source_surface(cr, source, 0.0, 0.0);
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cairo_paint(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(source);
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}
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unsigned short
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textwidth(Display *disp, XftFont *font, char *text)
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{
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cairo_surface_t *surface;
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cairo_t *cr;
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cairo_font_face_t *font_face;
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cairo_text_extents_t te;
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surface = cairo_xlib_surface_create(disp, DefaultScreen(disp),
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DefaultVisual(disp, DefaultScreen(disp)),
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DisplayWidth(disp, DefaultScreen(disp)),
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DisplayHeight(disp, DefaultScreen(disp)));
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cr = cairo_create(surface);
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font_face = cairo_ft_font_face_create_for_pattern(font->pattern);
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cairo_set_font_face(cr, font_face);
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cairo_set_font_size(cr, font->height);
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cairo_text_extents(cr, text, &te);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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cairo_font_face_destroy(font_face);
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return MAX(te.x_advance, te.width) + font->height;
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}
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99
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