588 lines
15 KiB
C
588 lines
15 KiB
C
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/*
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* Generic graphics and misc. utilities
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*
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*/
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#include <X11/Xlib.h>
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#include <stdlib.h>
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/* Masks to apply to color components when allocating colors
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* you may want to set them to 0xffff if your display supports 16bpp+
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*/
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#define RED_MASK 0xff00
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#define GREEN_MASK 0xff00
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#define BLUE_MASK 0xff00
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/*
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***********************************************************************
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* Allocates colors and fill a pixel value array. Color values are
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* truncated with RED_MASK, GREEN_MASK and BLUE_MASK
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*
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* from,to are the primary colors to use
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* maxcols is the number of colors
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* colors is the array of pixel values
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* light,dark are the colors for the relief
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* dr,dg,db are the increment values for the colors
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* alloc_relief if colors for relief should be allocated
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* incr - 0 if gradient is light to dark, 1 if dark to light
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***********************************************************************
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*/
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int MakeColors(Display *dpy, Drawable d, int from[3], int to[3], int maxcols,
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unsigned long *colors, unsigned long *dark,
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unsigned long *light, int dr, int dg, int db,
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int alloc_relief, int incr)
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{
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float rv, gv, bv;
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float sr,sg,sb;
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int red, green, blue;
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XColor color;
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int i;
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sr = (float)dr / (float)maxcols;
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sg = (float)dg / (float)maxcols;
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sb = (float)db / (float)maxcols;
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rv = (float)from[0];
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gv = (float)from[1];
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bv = (float)from[2];
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/* kludge to frce color allocation in the first iteration on any case */
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color.red = (from[0] == 0) ? 0xffff : 0;
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color.green = 0;
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color.blue = 0;
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for(i = 0; i < maxcols; i++) {
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/* color allocation saver */
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red = ((short)rv) & RED_MASK;
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green = ((short)gv) & GREEN_MASK;
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blue = ((short)bv) & BLUE_MASK;
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if (color.red != red || color.green != green || color.blue != blue) {
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color.red = red;
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color.green = green;
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color.blue = blue;
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if (XAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
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&color)==0) {
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return 0;
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}
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}
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colors[i] = color.pixel;
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rv += sr;
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gv += sg;
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bv += sb;
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rv = ((rv > 65535.0) || (rv < 0.0)) ? rv -= sr : rv;
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gv = ((gv > 65535.0) || (gv < 0.0)) ? gv -= sg : gv;
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bv = ((bv > 65535.0) || (bv < 0.0)) ? bv -= sb : bv;
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}
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/* allocate 2 colors for the bevel */
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if (alloc_relief) {
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if (incr) {
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rv = (float)from[0] * 0.8;
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gv = (float)from[1] * 0.8;
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bv = (float)from[2] * 0.8;
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} else {
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rv = (float)to[0] * 0.8;
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gv = (float)to[1] * 0.8;
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bv = (float)to[2] * 0.8;
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}
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color.red = (unsigned short)(rv<0?0:rv);
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color.green = (unsigned short)(gv<0?0:gv);
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color.blue = (unsigned short)(bv<0?0:bv);
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if (XAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),&color))
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*dark = color.pixel;
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else
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*dark = colors[incr ? 0 : maxcols-1];
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if (incr) {
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float avg;
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avg = (float)(to[0]+to[1]+to[2])/3;
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rv = avg + (float)(to[0]/2);
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gv = avg + (float)(to[1]/2);
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bv = avg + (float)(to[2]/2);
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} else {
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float avg;
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avg = (float)(from[0]+from[1]+from[2])/3;
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rv = avg + (float)(from[0]/2);
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gv = avg + (float)(from[1]/2);
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bv = avg + (float)(from[2]/2);
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}
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color.red = (unsigned short)(rv>65535.0 ? 65535.0:rv);
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color.green = (unsigned short)(gv>65535.0 ? 65535.0:gv);
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color.blue = (unsigned short)(bv>65535.0 ? 65535.0:bv);
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if (XAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
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&color))
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*light = color.pixel;
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else
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*light = colors[incr ? maxcols-1 : 0];
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} else {
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*light = colors[incr ? maxcols-1 : 0];
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*dark = colors[incr ? 0 : maxcols-1];
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}
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return 1;
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}
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/*
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************************************************************************
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*
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* Draws a texture similar to Wharf's button background
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*
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* from: r,g,b values of top left color
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* to: r,g,b values of bottom right color
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* relief: relief to add to the borders. 0=flat, >0 raised, <0 sunken
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* maxcols: # of max colors to use
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*
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* Aborts and returns 0 on error
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************************************************************************
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*/
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int DrawDegradeRelief(Display *dpy, Drawable d, int x, int y, int w, int h,
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int from[3], int to[3], int relief, int maxcols)
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{
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int i = 0,j,k;
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int dr, dg, db; /* delta */
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int dmax, dmax2;
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GC gc, gc2;
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XGCValues gcv;
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int px, py, pd;
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unsigned long lightcolor, darkcolor;
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int alloc_relief;
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unsigned long *colors;
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float c1,s1;
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if (w <= 0 || h <= 0)
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return 0;
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gcv.foreground = 1;
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gc = XCreateGC(dpy, d, GCForeground, &gcv);
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gc2 = XCreateGC(dpy, d, GCForeground, &gcv);
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dr = to[0] - from[0];
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dg = to[1] - from[1];
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db = to[2] - from[2];
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dmax = abs(dr);
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dmax2 = dr;
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if (dmax < abs(dg)) {
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dmax = abs(dg);
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dmax2 = dg;
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}
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if (dmax < abs(db)) {
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dmax = abs(db);
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dmax2 = db;
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}
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/* if colors from and to are the same, force to one color */
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if (dmax==0) dmax=1;
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if (relief!=0) {
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if (maxcols>4) {
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alloc_relief=1;
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maxcols -= 2; /* reserve two colors for the relief */
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} else {
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alloc_relief=0;
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}
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} else
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alloc_relief = 0;
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if (dmax < maxcols) {
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maxcols = dmax; /* we need less colors than we expected */
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}
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colors = malloc(sizeof(unsigned long)*maxcols);
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/* alloc colors */
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if (!MakeColors(dpy, d, from, to, maxcols, colors, &darkcolor, &lightcolor,
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dr, dg, db, alloc_relief, dmax2>0))
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return 0;
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/* display it */
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s1 = (float)(maxcols)/((float)w*2.0);
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pd = relief==0 ? 0 : 1;
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for(py = pd; py < h-pd; py++) {
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c1 = ((float)maxcols/2.0)*((float)py/(float)((h-pd*2)-1));
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j = -1;
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k=pd+x;
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for(px = pd+x; px < w-pd+x; px++) {
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i = (int)c1;
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if (i>=maxcols) i=maxcols-1;
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if (j != colors[i]) {
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j = colors[i];
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XSetForeground(dpy, gc, j);
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XDrawLine(dpy, d, gc, k, y+py, px, y+py);
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k=px;
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}
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c1+=s1;
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}
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XSetForeground(dpy, gc, colors[i]);
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XDrawLine(dpy, d, gc, k, y+py, w-pd+x, y+py);
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}
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/* draw borders */
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if (relief != 0) {
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if (relief>0) {
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XSetForeground(dpy, gc, lightcolor);
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XSetForeground(dpy, gc2, darkcolor);
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} else {
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XSetForeground(dpy, gc, darkcolor);
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XSetForeground(dpy, gc2, lightcolor);
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}
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XDrawLine(dpy, d, gc, x, y, x, y+h-1);
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XDrawLine(dpy, d, gc, x, y, x+w-1, y);
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XDrawLine(dpy, d, gc2, x, y+h-1, x+w-1, y+h-1);
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XDrawLine(dpy, d, gc2, x+w-1, y, x+w-1, y+h-1);
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}
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XFreeGC(dpy,gc);
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XFreeGC(dpy,gc2);
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free(colors);
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return 1;
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}
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/*
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************************************************************************
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*
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* Draws a horizontal gradient
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*
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* from: r,g,b values of top color
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* to: r,g,b values of bottom color
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* relief: relief to add to the borders. 0=flat, >0 raised, <0 sunken
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* maxcols: max colors to use
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* type: gradient type. 0 for one-way, != 0 for cilindrical
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*
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* aborts and returns 0 on error.
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************************************************************************
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*/
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int DrawHGradient(Display *dpy, Drawable d, int x, int y, int w, int h,
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int from[3], int to[3], int relief, int maxcols,
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int type)
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{
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int i,j;
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XGCValues gcv;
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GC gc, gc2;
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int dr,dg,db;
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float s,c;
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int dmax;
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unsigned long *colors, lightcolor, darkcolor;
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int py,pd;
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int alloc_relief;
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if (w <= 1 || h <= 1)
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return 0;
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gcv.foreground = 1;
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gc = XCreateGC(dpy, d, GCForeground, &gcv);
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gc2 = XCreateGC(dpy, d, GCForeground, &gcv);
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dr = to[0] - from[0];
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dg = to[1] - from[1];
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db = to[2] - from[2];
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dmax = dr;
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if (abs(dmax) < abs(dg)) {
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dmax = dg;
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}
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if (abs(dmax) < abs(db)) {
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dmax = db;
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}
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if (relief!=0) {
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if (maxcols>4) {
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alloc_relief=1;
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maxcols -= 2; /* reserve two colors for the relief */
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} else {
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alloc_relief=0;
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}
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} else
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alloc_relief=0;
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if (type) {
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if (h/2 < maxcols) {
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maxcols = h/2; /* we need less colors than we expected */
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}
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} else {
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if (h < maxcols) {
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maxcols = h; /* we need less colors than we expected */
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}
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}
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/* alloc colors */
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colors=malloc(maxcols*sizeof(unsigned long));
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if (!MakeColors(dpy, d, from, to, maxcols, colors, &darkcolor, &lightcolor,
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dr, dg, db, alloc_relief, dmax>0))
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return 0;
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/* display it */
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if (type) {
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s = ((float)maxcols*2)/(float)h;
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} else {
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s = (float)maxcols/(float)h;
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}
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pd = relief==0 ? 0 : 1;
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c=0;
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j=-1;
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if (type==0) { /* one-way */
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for(py = pd; py < h-pd; py++) {
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i=(int)c;
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if (i>=maxcols) i=maxcols-1;
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if (j != i) {
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XSetForeground(dpy, gc, colors[i]);
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}
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XDrawLine(dpy, d, gc, x+pd, y+py, x+w-1-pd, y+py);
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j = i;
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c += s;
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}
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} else { /* cylindrical */
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for(py = pd; py < h-pd; py++) {
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i=(int)c;
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if (i>=maxcols) i=maxcols-1;
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if (j != i) {
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XSetForeground(dpy, gc, colors[i]);
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}
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XDrawLine(dpy, d, gc, x+pd, y+py, x+w-1-pd, y+py);
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j = i;
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if (py == h/2) s = -s;
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c += s;
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}
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}
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/* draw borders */
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if (relief != 0) {
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if (relief>0) {
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XSetForeground(dpy, gc, lightcolor);
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XSetForeground(dpy, gc2, darkcolor);
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} else {
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XSetForeground(dpy, gc, darkcolor);
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XSetForeground(dpy, gc2, lightcolor);
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}
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XDrawLine(dpy, d, gc, x, y, x, y+h-1);
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XDrawLine(dpy, d, gc, x, y, x+w-1, y);
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XDrawLine(dpy, d, gc2, x, y+h-1, x+w-1, y+h-1);
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XDrawLine(dpy, d, gc2, x+w-1, y, x+w-1, y+h-1);
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}
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XFreeGC(dpy,gc);
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XFreeGC(dpy,gc2);
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free(colors);
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return 1;
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}
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/*
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************************************************************************
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|
*
|
||
|
|
* Draws a vertical gradient
|
||
|
|
*
|
||
|
|
* from: r,g,b values of left color
|
||
|
|
* to: r,g,b values of right color
|
||
|
|
* relief: relief to add to the borders. 0=flat, >0 raised, <0 sunken
|
||
|
|
* maxcols: max colors to use
|
||
|
|
* type: gradient type. 0 for one-way, != 0 for cilindrical
|
||
|
|
*
|
||
|
|
* aborts and returns 0 on error.
|
||
|
|
************************************************************************
|
||
|
|
*/
|
||
|
|
int DrawVGradient(Display *dpy, Drawable d, int x, int y, int w, int h,
|
||
|
|
int from[3], int to[3], int relief, int maxcols,
|
||
|
|
int type)
|
||
|
|
{
|
||
|
|
int i,j;
|
||
|
|
XGCValues gcv;
|
||
|
|
GC gc, gc2;
|
||
|
|
int dr,dg,db;
|
||
|
|
float s,c;
|
||
|
|
int dmax;
|
||
|
|
unsigned long *colors, lightcolor, darkcolor;
|
||
|
|
int px,pd;
|
||
|
|
int alloc_relief;
|
||
|
|
|
||
|
|
if (w <= 1 || h <= 1)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
gcv.foreground = 1;
|
||
|
|
gc = XCreateGC(dpy, d, GCForeground, &gcv);
|
||
|
|
gc2 = XCreateGC(dpy, d, GCForeground, &gcv);
|
||
|
|
|
||
|
|
dr = to[0] - from[0];
|
||
|
|
dg = to[1] - from[1];
|
||
|
|
db = to[2] - from[2];
|
||
|
|
|
||
|
|
dmax = dr;
|
||
|
|
if (abs(dmax) < abs(dg)) {
|
||
|
|
dmax = dg;
|
||
|
|
}
|
||
|
|
if (abs(dmax) < abs(db)) {
|
||
|
|
dmax = db;
|
||
|
|
}
|
||
|
|
if (relief!=0) {
|
||
|
|
if (maxcols>4) {
|
||
|
|
alloc_relief=1;
|
||
|
|
maxcols -= 2; /* reserve two colors for the relief */
|
||
|
|
} else {
|
||
|
|
alloc_relief=0;
|
||
|
|
}
|
||
|
|
} else
|
||
|
|
alloc_relief=0;
|
||
|
|
|
||
|
|
if (type) {
|
||
|
|
if (w/2 < maxcols) {
|
||
|
|
maxcols = w/2; /* we need less colors than we expected */
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (w < maxcols) {
|
||
|
|
maxcols = w; /* we need less colors than we expected */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* alloc colors */
|
||
|
|
colors=malloc(maxcols*sizeof(unsigned long));
|
||
|
|
if (!MakeColors(dpy, d, from, to, maxcols, colors, &darkcolor, &lightcolor,
|
||
|
|
dr, dg, db, alloc_relief, dmax>0))
|
||
|
|
return 0;
|
||
|
|
/* display it */
|
||
|
|
if (type) {
|
||
|
|
s = ((float)maxcols*2)/(float)w;
|
||
|
|
} else {
|
||
|
|
s = (float)maxcols/(float)w;
|
||
|
|
}
|
||
|
|
pd = relief==0 ? 0 : 1;
|
||
|
|
c=0;
|
||
|
|
j=-1;
|
||
|
|
if (type==0) { /* one-way */
|
||
|
|
for(px = pd; px < w-pd; px++) {
|
||
|
|
i=(int)c;
|
||
|
|
if (i>=maxcols) i=maxcols-1;
|
||
|
|
if (j != i) {
|
||
|
|
XSetForeground(dpy, gc, colors[i]);
|
||
|
|
}
|
||
|
|
XDrawLine(dpy, d, gc, x+px, y+pd, x+px, y+h-pd-1);
|
||
|
|
j = i;
|
||
|
|
c += s;
|
||
|
|
}
|
||
|
|
} else { /* cylindrical */
|
||
|
|
for(px = pd; px < w-pd; px++) {
|
||
|
|
i=(int)c;
|
||
|
|
if (i>=maxcols) i=maxcols-1;
|
||
|
|
if (j != i) {
|
||
|
|
XSetForeground(dpy, gc, colors[i]);
|
||
|
|
}
|
||
|
|
XDrawLine(dpy, d, gc, x+px, y+pd, x+px, y+h-pd-1);
|
||
|
|
j = i;
|
||
|
|
if (px == w/2) s = -s;
|
||
|
|
c += s;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* draw borders */
|
||
|
|
if (relief != 0) {
|
||
|
|
if (relief>0) {
|
||
|
|
XSetForeground(dpy, gc, lightcolor);
|
||
|
|
XSetForeground(dpy, gc2, darkcolor);
|
||
|
|
} else {
|
||
|
|
XSetForeground(dpy, gc, darkcolor);
|
||
|
|
XSetForeground(dpy, gc2, lightcolor);
|
||
|
|
}
|
||
|
|
XDrawLine(dpy, d, gc, x, y, x, y+h-1);
|
||
|
|
XDrawLine(dpy, d, gc, x, y, x+w-1, y);
|
||
|
|
XDrawLine(dpy, d, gc2, x, y+h-1, x+w-1, y+h-1);
|
||
|
|
XDrawLine(dpy, d, gc2, x+w-1, y, x+w-1, y+h-1);
|
||
|
|
}
|
||
|
|
XFreeGC(dpy,gc);
|
||
|
|
XFreeGC(dpy,gc2);
|
||
|
|
free(colors);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
*
|
||
|
|
* Draws text with a texture
|
||
|
|
*
|
||
|
|
* d - target drawable
|
||
|
|
* font - font to draw text
|
||
|
|
* x,y - position of text
|
||
|
|
* gradient - texture pixmap. size must be at least as large as text
|
||
|
|
* text - text to draw
|
||
|
|
* chars - chars in text
|
||
|
|
************************************************************************/
|
||
|
|
void DrawTexturedText(Display *dpy, Drawable d, XFontStruct *font,
|
||
|
|
int x, int y, Pixmap gradient, char *text, int chars)
|
||
|
|
|
||
|
|
{
|
||
|
|
Pixmap mask;
|
||
|
|
int w,h;
|
||
|
|
GC gc;
|
||
|
|
XGCValues gcv;
|
||
|
|
|
||
|
|
/* make the mask pixmap */
|
||
|
|
w = XTextWidth(font,text,chars);
|
||
|
|
h = font->ascent+font->descent;
|
||
|
|
mask=XCreatePixmap(dpy,DefaultRootWindow(dpy),w+1,h+1,1);
|
||
|
|
gcv.foreground = 0;
|
||
|
|
gcv.function = GXcopy;
|
||
|
|
gcv.font = font->fid;
|
||
|
|
gc = XCreateGC(dpy,mask,GCFunction|GCForeground|GCFont,&gcv);
|
||
|
|
XFillRectangle(dpy,mask,gc,0,0,w,h);
|
||
|
|
XSetForeground(dpy,gc,1);
|
||
|
|
XDrawString(dpy,mask,gc,0,font->ascent,text,chars);
|
||
|
|
XFreeGC(dpy,gc);
|
||
|
|
/* draw the texture */
|
||
|
|
gcv.function=GXcopy;
|
||
|
|
gc = XCreateGC(dpy,d,GCFunction,&gcv);
|
||
|
|
XSetClipOrigin(dpy,gc,x,y);
|
||
|
|
XSetClipMask(dpy,gc,mask);
|
||
|
|
XCopyArea(dpy,gradient,d,gc,0,0,w,h,x,y);
|
||
|
|
XFreeGC(dpy,gc);
|
||
|
|
XFreePixmap(dpy,mask);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int MakeShadowColors(Display *dpy, int from[3], int to[3],
|
||
|
|
unsigned long *dark, unsigned long *light)
|
||
|
|
{
|
||
|
|
float rv, gv, bv;
|
||
|
|
XColor color;
|
||
|
|
int incr;
|
||
|
|
int dr,dg,db,dmax;
|
||
|
|
|
||
|
|
dr = to[0] - from[0];
|
||
|
|
dg = to[1] - from[1];
|
||
|
|
db = to[2] - from[2];
|
||
|
|
|
||
|
|
dmax = dr;
|
||
|
|
if (abs(dmax) < abs(dg)) {
|
||
|
|
dmax = dg;
|
||
|
|
}
|
||
|
|
if (abs(dmax) < abs(db)) {
|
||
|
|
dmax = db;
|
||
|
|
}
|
||
|
|
incr=(dmax>0);
|
||
|
|
/* allocate 2 colors for the bevel */
|
||
|
|
if (incr) {
|
||
|
|
rv = (float)from[0] * 0.8;
|
||
|
|
gv = (float)from[1] * 0.8;
|
||
|
|
bv = (float)from[2] * 0.8;
|
||
|
|
} else {
|
||
|
|
rv = (float)to[0] * 0.8;
|
||
|
|
gv = (float)to[1] * 0.8;
|
||
|
|
bv = (float)to[2] * 0.8;
|
||
|
|
}
|
||
|
|
color.red = (short)(rv<0?0:rv);
|
||
|
|
color.green = (short)(gv<0?0:gv);
|
||
|
|
color.blue = (short)(bv<0?0:bv);
|
||
|
|
if (XAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),&color))
|
||
|
|
*dark = color.pixel;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (incr) {
|
||
|
|
float avg;
|
||
|
|
avg = (float)(to[0]+to[1]+to[2])/3;
|
||
|
|
rv = avg + (float)(to[0]/2);
|
||
|
|
gv = avg + (float)(to[1]/2);
|
||
|
|
bv = avg + (float)(to[2]/2);
|
||
|
|
} else {
|
||
|
|
float avg;
|
||
|
|
avg = (float)(from[0]+from[1]+from[2])/3;
|
||
|
|
rv = avg + (float)(from[0]/2);
|
||
|
|
gv = avg + (float)(from[1]/2);
|
||
|
|
bv = avg + (float)(from[2]/2);
|
||
|
|
}
|
||
|
|
color.red = (unsigned short)(rv>65535.0 ? 65535.0:rv);
|
||
|
|
color.green = (unsigned short)(gv>65535.0 ? 65535.0:gv);
|
||
|
|
color.blue = (unsigned short)(bv>65535.0 ? 65535.0:bv);
|
||
|
|
if (XAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
|
||
|
|
&color))
|
||
|
|
*light = color.pixel;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
return 1;
|
||
|
|
}
|