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202 lines
5.0 KiB
202 lines
5.0 KiB
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <X11/Xlib.h>
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#include "draw.h"
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#include "util.h"
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Draw *
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draw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
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Draw *draw = (Draw *)calloc(1, sizeof(Draw));
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draw->dpy = dpy;
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draw->screen = screen;
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draw->win = win;
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draw->w = w;
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draw->h = h;
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draw->drawable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
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draw->gc = XCreateGC(dpy, win, 0, NULL);
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XSetLineAttributes(dpy, draw->gc, 1, LineSolid, CapButt, JoinMiter);
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return draw;
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}
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void
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draw_resize(Draw *draw, unsigned int w, unsigned int h) {
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if(!draw)
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return;
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draw->w = w;
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draw->h = h;
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XFreePixmap(draw->dpy, draw->drawable);
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draw->drawable = XCreatePixmap(draw->dpy, draw->win, w, h, DefaultDepth(draw->dpy, draw->screen));
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}
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void
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draw_free(Draw *draw) {
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XFreePixmap(draw->dpy, draw->drawable);
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XFreeGC(draw->dpy, draw->gc);
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free(draw);
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}
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Fnt *
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draw_font_create(Draw *draw, const char *fontname) {
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Fnt *font;
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char *def, **missing;
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int n;
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if(!draw)
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return NULL;
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font = (Fnt *)calloc(1, sizeof(Fnt));
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font->set = XCreateFontSet(draw->dpy, fontname, &missing, &n, &def);
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if(missing) {
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while(n--)
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fprintf(stderr, "draw: missing fontset: %s\n", missing[n]);
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XFreeStringList(missing);
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}
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if(font->set) {
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XFontStruct **xfonts;
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char **font_names;
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XExtentsOfFontSet(font->set);
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n = XFontsOfFontSet(font->set, &xfonts, &font_names);
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while(n--) {
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font->ascent = MAX(font->ascent, (*xfonts)->ascent);
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font->descent = MAX(font->descent,(*xfonts)->descent);
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xfonts++;
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}
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}
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else {
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if(!(font->xfont = XLoadQueryFont(draw->dpy, fontname))
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&& !(font->xfont = XLoadQueryFont(draw->dpy, "fixed")))
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die("error, cannot load font: '%s'\n", fontname);
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font->ascent = font->xfont->ascent;
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font->descent = font->xfont->descent;
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}
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font->h = font->ascent + font->descent;
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return font;
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}
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void
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draw_font_free(Draw *draw, Fnt *font) {
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if(!draw || !font)
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return;
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if(font->set)
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XFreeFontSet(draw->dpy, font->set);
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else
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XFreeFont(draw->dpy, font->xfont);
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free(font);
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}
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Col *
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draw_col_create(Draw *draw, const char *colname) {
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Col *col = (Col *)calloc(1, sizeof(Col));
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Colormap cmap = DefaultColormap(draw->dpy, draw->screen);
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XColor color;
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if(!XAllocNamedColor(draw->dpy, cmap, colname, &color, &color))
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die("error, cannot allocate color '%s'\n", colname);
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col->rgb = color.pixel;
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return col;
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}
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void
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draw_col_free(Draw *draw, Col *col) {
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if(!col)
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return;
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free(col);
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}
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void
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draw_setfont(Draw *draw, Fnt *font) {
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if(!draw)
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return;
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draw->font = font;
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}
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void
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draw_setfg(Draw *draw, Col *col) {
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if(!draw)
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return;
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draw->fg = col;
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}
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void
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draw_setbg(Draw *draw, Col *col) {
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if(!draw)
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return;
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draw->bg = col;
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}
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void
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draw_rect(Draw *draw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert) {
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int dx;
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if(!draw || !draw->font || !draw->fg || !draw->bg)
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return;
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XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
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dx = (draw->font->ascent + draw->font->descent + 2) / 4;
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if(filled)
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XFillRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx+1, dx+1);
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else if(empty)
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XDrawRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx, dx);
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}
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void
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draw_text(Draw *draw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert) {
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char buf[256];
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int i, tx, ty, len, olen;
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TextExtents tex;
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if(!draw || !draw->fg || !draw->bg)
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return;
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XSetForeground(draw->dpy, draw->gc, invert ? draw->fg->rgb : draw->bg->rgb);
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XFillRectangle(draw->dpy, draw->drawable, draw->gc, x, y, w, h);
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if(!text || !draw->font)
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return;
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olen = strlen(text);
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draw_getextents(draw, text, olen, &tex);
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ty = y + (h / 2) - tex.yOff;
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tx = x + tex.xOff;
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/* shorten text if necessary */
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for(len = MIN(olen, sizeof buf); len && tex.w > w - tex.h; len--)
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draw_getextents(draw, text, len, &tex);
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if(!len)
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return;
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memcpy(buf, text, len);
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if(len < olen)
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for(i = len; i && i > len - 3; buf[--i] = '.');
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XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
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if(draw->font->set)
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XmbDrawString(draw->dpy, draw->drawable, draw->font->set, draw->gc, tx, ty, buf, len);
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else
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XDrawString(draw->dpy, draw->drawable, draw->gc, tx, ty, buf, len);
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}
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void
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draw_map(Draw *draw, int x, int y, unsigned int w, unsigned int h) {
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if(!draw)
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return;
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XCopyArea(draw->dpy, draw->drawable, draw->win, draw->gc, x, y, w, h, x, y);
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XSync(draw->dpy, False);
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}
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void
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draw_getextents(Draw *draw, const char *text, unsigned int len, TextExtents *extents) {
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XRectangle r;
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if(!draw || !draw->font || !text)
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return;
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if(draw->font->set) {
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XmbTextExtents(draw->font->set, text, len, NULL, &r);
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extents->xOff = r.x;
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extents->yOff = r.y;
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extents->w = r.width;
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extents->h = r.height;
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}
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else {
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extents->h = draw->font->ascent + draw->font->descent;
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extents->w = XTextWidth(draw->font->xfont, text, len);
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extents->xOff = extents->h / 2;
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extents->yOff = (extents->h / 2) + draw->font->ascent;
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}
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}
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