/*
* stepgfx - Generic graphics and misc. utility module
*
* Copyright (c) 1996 Alfredo K. Kojima (kojima@inf.ufrgs.br)
*
* This module is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <X11/Xlib.h>
#include <stdlib.h>
#include <stdio.h>
#include "../configure.h"
#include "afterstep.h"
#include <X11/Xatom.h>
#include "misc.h"
#include "screen.h"
#include "hashtable.h"
static int table_initialized=0;
static HashTable ColorTable;
static Visual *ScreenVisual;
static int rshift, gshift, bshift;
static int Bits;
static unsigned long
getTrueColor(XColor *color)
{
unsigned long pixel;
int r, g, b;
r = (rshift < 0 ? color->red << (-rshift) : color->red >> rshift);
g = (gshift < 0 ? color->green << (-gshift) : color->green >> gshift);
b = (bshift < 0 ? color->blue << (-bshift) : color->blue >> bshift);
pixel = ((r & ScreenVisual->red_mask)
| (g & ScreenVisual->green_mask)
| (b & ScreenVisual->blue_mask));
return pixel;
}
static int
get_shifts(unsigned long mask)
{
int i=0;
while (mask) {
mask>>=1;
i++;
}
return i-1;
}
/*
* Allocates a color or get's it from the color cache.
* If the display is TrueColor, make the color by ourselves.
*/
static int
MyAllocColor(Display *dpy, Colormap cmap, XColor *color)
{
unsigned long key, r, g, b;
if (!table_initialized) {
table_initialized=1;
table_init(&ColorTable);
ScreenVisual=DefaultVisual(dpy, Scr.screen);
if (ScreenVisual->class==TrueColor) {
rshift = 15 - get_shifts(ScreenVisual->red_mask);
gshift = 15 - get_shifts(ScreenVisual->green_mask);
bshift = 15 - get_shifts(ScreenVisual->blue_mask);
}
Bits = 16 - ScreenVisual->bits_per_rgb;
}
if (ScreenVisual->class==TrueColor) {
/* make true color ourself */
color->pixel = getTrueColor(color);
return 1;
} else {
r = color->red>>Bits;
g = color->green>>Bits;
b = color->blue>>Bits;
key = r*r+g*g+b*b;
if (!table_iget(&ColorTable, key, &color->pixel)) {
/* color not in cache, have to allocate this new color */
if (XAllocColor(dpy, cmap, color)==0)
return 0;
/* put color in cache */
table_iput(&ColorTable, key, color->pixel);
}
return 1;
}
}
/* Masks to apply to color components when allocating colors
* you may want to set them to 0xffff if your display supports 16bpp+
*/
#define RED_MASK 0xff00
#define GREEN_MASK 0xff00
#define BLUE_MASK 0xff00
/*
***********************************************************************
* Allocates colors and fill a pixel value array. Color values are
* truncated with RED_MASK, GREEN_MASK and BLUE_MASK
*
* from,to are the primary colors to use
* maxcols is the number of colors
* colors is the array of pixel values
* light,dark are the colors for the relief
* dr,dg,db are the increment values for the colors
* alloc_relief if colors for relief should be allocated
* incr - 0 if gradient is light to dark, 1 if dark to light
***********************************************************************
*/
int MakeColors(Display *dpy, Drawable d, int from[3], int to[3], int maxcols,
unsigned long *colors, unsigned long *dark,
unsigned long *light, int dr, int dg, int db,
int alloc_relief, int incr)
{
float rv, gv, bv;
float sr,sg,sb;
int red, green, blue;
XColor color;
int i;
sr = (float)dr / (float)maxcols;
sg = (float)dg / (float)maxcols;
sb = (float)db / (float)maxcols;
rv = (float)from[0];
gv = (float)from[1];
bv = (float)from[2];
/* kludge to frce color allocation in the first iteration on any case */
color.red = (from[0] == 0) ? 0xffff : 0;
color.green = 0;
color.blue = 0;
for(i = 0; i < maxcols; i++) {
/* color allocation saver */
red = ((short)rv) & RED_MASK;
green = ((short)gv) & GREEN_MASK;
blue = ((short)bv) & BLUE_MASK;
if (color.red != red || color.green != green || color.blue != blue) {
color.red = red;
color.green = green;
color.blue = blue;
if (MyAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
&color)==0) {
return 0;
}
}
colors[i] = color.pixel;
rv += sr;
gv += sg;
bv += sb;
rv = ((rv > 65535.0) || (rv < 0.0)) ? rv -= sr : rv;
gv = ((gv > 65535.0) || (gv < 0.0)) ? gv -= sg : gv;
bv = ((bv > 65535.0) || (bv < 0.0)) ? bv -= sb : bv;
}
/* allocate 2 colors for the bevel */
if (alloc_relief) {
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 = (unsigned short)(rv<0?0:rv);
color.green = (unsigned short)(gv<0?0:gv);
color.blue = (unsigned short)(bv<0?0:bv);
if (MyAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),&color))
*dark = color.pixel;
else
*dark = colors[incr ? 0 : maxcols-1];
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 (MyAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
&color))
*light = color.pixel;
else
*light = colors[incr ? maxcols-1 : 0];
} else {
*light = colors[incr ? maxcols-1 : 0];
*dark = colors[incr ? 0 : maxcols-1];
}
return 1;
}
/*
************************************************************************
*
* Draws a texture similar to Wharf's button background
*
* from: r,g,b values of top left color
* to: r,g,b values of bottom right color
* relief: relief to add to the borders. 0=flat, >0 raised, <0 sunken
* maxcols: # of max colors to use
*
* Aborts and returns 0 on error
************************************************************************
*/
int DrawDegradeRelief(Display *dpy, Drawable d, int x, int y, int w, int h,
int from[3], int to[3], int relief, int maxcols)
{
int i,j,k;
int dr, dg, db; /* delta */
int dmax, dmax2;
GC gc, gc2;
XGCValues gcv;
int px, py, pd;
unsigned long lightcolor, darkcolor;
int alloc_relief;
unsigned long *colors;
float c1,s1;
if (w <= 0 || h <= 0)
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 = abs(dr);
dmax2 = dr;
if (dmax < abs(dg)) {
dmax = abs(dg);
dmax2 = dg;
}
if (dmax < abs(db)) {
dmax = abs(db);
dmax2 = db;
}
/* if colors from and to are the same, force to one color */
if (dmax==0) dmax=1;
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 (dmax < maxcols) {
maxcols = dmax; /* we need less colors than we expected */
}
colors = malloc(sizeof(unsigned long)*maxcols);
/* alloc colors */
if (!MakeColors(dpy, d, from, to, maxcols, colors, &darkcolor, &lightcolor,
dr, dg, db, alloc_relief, dmax2>0))
return 0;
/* display it */
s1 = (float)(maxcols)/((float)w*2.0);
pd = relief==0 ? 0 : 1;
for(py = pd; py < h-pd; py++) {
c1 = ((float)maxcols/2.0)*((float)py/(float)((h-pd*2)-1));
j = -1;
k=pd+x;
for(px = pd+x; px < w-pd+x; px++) {
i = (int)c1;
if (i>=maxcols) i=maxcols-1;
if (j != colors[i]) {
j = colors[i];
XSetForeground(dpy, gc, j);
XDrawLine(dpy, d, gc, k, y+py, px, y+py);
k=px;
}
c1+=s1;
}
XSetForeground(dpy, gc, colors[i]);
XDrawLine(dpy, d, gc, k, y+py, w-pd+x, y+py);
}
/* 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 a horizontal gradient
*
* from: r,g,b values of top color
* to: r,g,b values of bottom 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 DrawHGradient(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 py,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 (h/2 < maxcols) {
maxcols = h/2; /* we need less colors than we expected */
}
} else {
if (h < maxcols) {
maxcols = h; /* 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)h;
} else {
s = (float)maxcols/(float)h;
}
pd = relief==0 ? 0 : 1;
c=0;
j=-1;
if (type==0) { /* one-way */
for(py = pd; py < h-pd; py++) {
i=(int)c;
if (i>=maxcols) i=maxcols-1;
if (j != i) {
XSetForeground(dpy, gc, colors[i]);
}
XDrawLine(dpy, d, gc, x+pd, y+py, x+w-1-pd, y+py);
j = i;
c += s;
}
} else { /* cylindrical */
for(py = pd; py < h-pd; py++) {
i=(int)c;
if (i>=maxcols) i=maxcols-1;
if (j != i) {
XSetForeground(dpy, gc, colors[i]);
}
XDrawLine(dpy, d, gc, x+pd, y+py, x+w-1-pd, y+py);
j = i;
if (py == h/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 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
************************************************************************/
#ifdef I18N
void DrawTexturedText(Display *dpy, Drawable d, XFontStruct *font, XFontSet fontset,
int x, int y, Pixmap gradient, char *text, int chars)
#else
void DrawTexturedText(Display *dpy, Drawable d, XFontStruct *font,
int x, int y, Pixmap gradient, char *text, int chars)
#endif
{
Pixmap mask;
int w,h;
GC gc;
XGCValues gcv;
/* make the mask pixmap */
#ifdef I18N
w = XmbTextEscapement(fontset,text,chars);
#else
w = XTextWidth(font,text,chars);
#endif
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);
#ifdef I18N
/* ref: misc.h */
XmbDrawString(dpy,mask,fontset,gc,0,font->ascent,text,chars);
#else
XDrawString(dpy,mask,gc,0,font->ascent,text,chars);
#endif
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 i;
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 (MyAllocColor(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 (MyAllocColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)),
&color))
*light = color.pixel;
else
return 0;
return 1;
}
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