From b8e79deb5b362cf572a31be7cba75a6c6f602358 Mon Sep 17 00:00:00 2001
From: epoch <epoch@hacking.allowed.org>
Date: Sat, 3 Feb 2018 22:35:44 -0600
Subject: framebuffer support

---
 src/graphics_cs_fb.c | 577 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 577 insertions(+)
 create mode 100644 src/graphics_cs_fb.c

(limited to 'src/graphics_cs_fb.c')

diff --git a/src/graphics_cs_fb.c b/src/graphics_cs_fb.c
new file mode 100644
index 0000000..9885bd6
--- /dev/null
+++ b/src/graphics_cs_fb.c
@@ -0,0 +1,577 @@
+#define _POSIX_C_SOURCE 200809L //for fileno and strdup
+#include <stdio.h>
+#include <fcntl.h>
+#include <linux/fb.h>
+#include <linux/input.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <time.h>
+
+#include "config.h"
+#include "common.h"
+#include "graphics_c3.h"//not needed?
+#include "graphics_fb.h"
+#include "graphics_cs.h"
+
+//typedef float real; //think this conflicts?
+
+//TODO: will have to make some pixmaps get resized when the window does.
+//for now set them to be as big as you think you'll ever resize the window to.
+
+//#define SKYRULE 90
+//#define SKYW (WIDTH*5)
+//#define SKYH (HEIGHT/2)
+
+//Pixmap skypixmap;
+//char sky[SKYH][SKYW];
+
+extern struct global global;
+extern struct gra_global gra_global;
+struct fb_global fb_global;
+
+#ifdef GRAPHICAL
+
+/*
+struct plane {
+ c3_t p;
+ real xr;
+ real yr;
+ real zr;
+}
+
+void calculate_shape_color(c3_s_t s,real d) {
+//given: at least 3 points on a plane.
+//needed: angles of the plane.
+//
+ xa=
+ ya=
+ za=
+ for(i=0;i<;i++) {
+   s.p.x
+ }
+}
+*/
+
+void set_luminosity_color(int lum) {//need to come up with a good range for this.
+  fb_global.current_color=((200-lum) << 16) | ((200-lum) << 8) | lum;
+}
+
+void draw_cs_point(int x,int y) {//this should write to a backbuffer then I can memcopy it over.
+ unsigned int i=y * fb_global.info.xres + x;
+ if(x > fb_global.info.xres) return;
+ if(y > fb_global.info.yres) return;
+ if(i > fb_global.fblen) return;
+ switch(fb_global.draw_mode) {
+  case DRAW_MODE_COPY:
+   fb_global.backbuf[i]=fb_global.current_color;
+   break;
+  case DRAW_MODE_OR:
+   fb_global.backbuf[i] |= fb_global.current_color;
+   break;
+  case DRAW_MODE_AND:
+   fb_global.backbuf[i] &= fb_global.current_color;
+   break;
+  case DRAW_MODE_CLEAR:
+   fb_global.backbuf[i]=0;
+   break;
+  default:
+   printf("# derp. unknown draw_mode %d\n",fb_global.draw_mode);
+   break;
+ }
+}
+
+void draw_cs_line(cs_t p1,cs_t p2) {//error somewhere in here. derp...
+  int x,y;
+  real m;
+  int b;
+  int xd,yd;
+  if(p1.x == p2.x) {
+    for(y=min(p1.y,p2.y);y<max(p1.y,p2.y);y++) {
+      draw_cs_point(p1.x,y);
+    }
+  }
+  if(p1.y == p2.y) {
+    for(x=min(p1.x,p2.x);x<max(p1.x,p2.x);x++) {
+      draw_cs_point(x,p1.y);
+    }
+  }
+  xd=p1.x<p2.x?1:-1;
+  yd=p1.y<p2.y?1:-1;
+  if(max(p1.x,p2.x)-min(p1.x,p2.x) >= max(p1.y,p2.y)-min(p1.y,p2.y)) { //loop over x. like normal math. :P y=mx+b stuff.
+   m=((real)(p1.y-p2.y))/((real)(p1.x-p2.x));
+   b=(int)((real)p1.y - (m * (real)p1.x));
+   for(x=p1.x;x!=p2.x;x+=xd) {
+    y=(int)(m * (real)x + (real)b); 
+    draw_cs_point(x,y);
+   }
+  } else { //loop over y
+   m=((real)(p1.x-p2.x))/((real)(p1.y-p2.y));
+   b=(int)((real)p1.x - (m * (real)p1.y));
+   for(y=p1.y;y!=p2.y;y+=yd) {
+     x=(int)(m * (real)y + (real)b);
+     draw_cs_point(x,y);
+   }
+  }
+  //now for the fun part.
+}
+
+void draw_cs_text(cs_t p,char *text) {
+/* char t[256];
+ int direction,ascent,descent;
+ XFontStruct *font=XLoadQueryFont(x11_global.dpy,"fixed");
+ XCharStruct overall;
+ snprintf(t,sizeof(t)-1,"%s",text);
+ XTextExtents(font,text,strlen(text),&direction,&ascent,&descent,&overall);
+ XDrawString(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p.x,p.y+(descent+ascent),text,strlen(text));*/
+}
+
+void draw_cs_shape(cs_s_t s) {//this is implemented as draw_cs_line... hrm. it could be moved up to graphics.c? probl no.
+  //test in here whether a mouse click is within this shape's... bounding box? sure.
+  cs_s_t bb;//bounding box
+  int minx=s.p[0].x;
+  int miny=s.p[0].y;
+  int maxx=s.p[0].x;
+  int maxy=s.p[0].y;
+  int h;
+  int i;//all cs shapes can have 1, 2, or 3+ points. guess I gotta do that logic here too.
+  switch(s.len) {
+   case 1:
+    //circle
+    h=max(s.p[0].x,s.p[1].x)-min(s.p[0].x,s.p[1].x);
+    //XDrawArc(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,s.p[0].x-h,s.p[0].y-h,h*2,h*2,0,360*64);
+    break;
+   default:
+    for(i=0;i<s.len+(s.len==1);i++) {//this shape is closed!
+      minx=(s.p[i].x<minx)?s.p[i].x:minx;
+      miny=(s.p[i].y<miny)?s.p[i].y:miny;
+      maxx=(s.p[i].x>maxx)?s.p[i].x:maxx;
+      maxy=(s.p[i].y>maxy)?s.p[i].y:maxy;
+      draw_cs_line(s.p[i],s.p[(i+1)%(s.len+(s.len==1))]);
+    }
+    if(gra_global.mousex >= minx &&
+         gra_global.mousey >= miny &&
+         gra_global.mousex <= maxx &&
+         gra_global.mousey <= maxy) {
+      if(gra_global.buttonpressed) {//if we're inside the bounding box let's make SOMETHING happen.
+          printf("%s action %s\n",global.user,s.id);
+        }
+      if(!strncmp(s.id,"term",4)) {
+       gra_global.input_mode=1;
+      }
+      bb.id=strdup("boundingbox");
+      bb.len=4;
+      bb.p[0].x=minx;
+      bb.p[0].y=miny;
+      bb.p[1].x=minx;
+      bb.p[1].y=maxy;
+      bb.p[2].x=maxx;
+      bb.p[2].y=maxy;
+      bb.p[3].x=maxx;
+      bb.p[3].y=miny;
+      draw_cs_filled_shape(bb);
+      free(bb.id);
+    }
+    break;
+  }
+}
+
+int x_from_y(cs_t p1,cs_t p2,int y) {//get the value of x given a y within a line.
+ real m;
+ int b;
+ int x;
+// y=mx+b MAGIC
+ if(p1.x == p2.x) return p1.x;//if this happens then we have a verticle line and can just shortcut this shit.
+ if(p1.y == p2.y) {//if this happens we have a horizontal line we're trying to find the X of based on a 'y' that probably isn't in the line...
+  return 0;
+ }//return p1.x;//WE SHOULD NOT GET HERE. fuck if I know.
+// y=mx+b
+// y-b=mx
+// x=(y-b)/m
+// b=y-mx
+ m=((real)(p1.y-p2.y))/((real)(p1.x-p2.x));
+ b=(int)((real)p1.y - (m * (real)p1.x));
+ x=(int)(((real)(y-b))/m);
+ if(!x) printf("x == %d y=%d m=%f b=%d\n",x,y,m,b);
+ return x;
+}
+
+void draw_cs_filled_shape(cs_s_t s) {//no circle handling atm. and only convex polygons.
+ int maxmax=0;
+ int minmin=0;
+ cs_t p1;
+ cs_t p2;
+ int i;
+ int y;
+ for(i=0;i<s.len;i++) {//find the minimum and maximum points. minmin is smallest x and y. maxmax is biggest x and y.
+   if(s.p[i].y < s.p[minmin].y || (s.p[i].y == s.p[minmin].y && s.p[i].x < s.p[minmin].x)) minmin=i;
+   if(s.p[i].y > s.p[maxmax].y || (s.p[i].y==s.p[maxmax].y && s.p[i].x > s.p[maxmax].x)) maxmax=i;
+ }
+ int a1=minmin;
+ int a2=(minmin+1)%s.len;
+ int b1=minmin;
+ int b2=(minmin+s.len-1)%s.len;
+ for(y=s.p[minmin].y;y<s.p[maxmax].y;y++) {//loop from minimum y to maximum y.
+  //now we need to trace lines from minmin to what minmin connects to. minmin+1 and minmin-1
+  while(y == s.p[a2].y) { a1=a2; a2=(a2+1)%s.len; }
+  while(y == s.p[b2].y) { b1=b2; b2=(b2+s.len-1)%s.len; }
+  if(s.p[a1].y != s.p[a2].y) p1=(cs_t){x_from_y(s.p[a1],s.p[a2],y),y};
+  if(s.p[b1].y != s.p[b2].y) p2=(cs_t){x_from_y(s.p[b1],s.p[b2],y),y};
+  draw_cs_line(p1,p2);//the two y values are always the same here.
+ }
+}
+/*
+void draw_cs_filled_shape(cs_s_t s) {
+  int h;
+  int i;
+  //XPoint Xp[s.len+(s.len==1)];
+  for(i=0;i<s.len+(s.len==1);i++) {
+    //Xp[i]=(XPoint){s.p[i].x,s.p[i].y};
+  }
+  switch(s.len) {
+   case 1:
+    h=max(s.p[0].y,s.p[1].y)-min(s.p[0].y,s.p[1].y);
+    h=max(s.p[0].x,s.p[1].x)-min(s.p[0].x,s.p[0].x);
+    //XFillArc(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,s.p[0].x-h,s.p[0].y-h,h*2,h*2,0,360*64);
+    break;
+   default:
+    //XFillPolygon(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,Xp,s.len,Convex,CoordModeOrigin);
+    break;
+  }
+}*/
+
+//should I do clipping in each graphics lib or make graphics.c just have clipping stuff?
+void clear_backbuffer() {
+  //XCopyArea(x11_global.dpy,x11_global.cleanbackbuffer,x11_global.backbuffer,x11_global.gc,0,0,gra_global.width,gra_global.height,0,0);
+  memset(fb_global.backbuf,0,fb_global.fblen);
+}
+
+void set_clipping_rectangle(int x,int y,int width,int height) {
+  //XRectangle cliprect;
+  //cliprect.x=0;
+  //cliprect.y=0;
+  //cliprect.width=width;
+  //cliprect.height=height;
+  //XSetClipRectangles(x11_global.dpy,x11_global.backgc,x,y,&cliprect,1,Unsorted);
+}
+
+void draw_mode_copy() {
+  fb_global.draw_mode=DRAW_MODE_COPY;
+}
+
+void draw_mode_and() {
+  fb_global.draw_mode=DRAW_MODE_AND;
+}
+
+void draw_mode_or() {
+  fb_global.draw_mode=DRAW_MODE_OR;
+}
+
+void red_and_blue_magic() {
+  draw_mode_or();
+}
+
+//void draw_sky() {
+//  XCopyArea(x11_global.dpy,skypixmap,x11_global.backbuffer,x11_global.backgc,((global.camera.yr.d*5)+SKYW)%SKYW,0,WIDTH,gra_global.height/2,0,0);
+//}
+
+void set_ansi_color(int i) {
+  fb_global.current_color=(i&4?0xff0000:0x0) | (i&2 ?0xff00:0x0) | (i&1?0xff:0x0);// :D
+}
+
+void set_color() {
+  fb_global.current_color=0x00ff00;
+}
+
+void set_color_red() {
+  fb_global.current_color=0xff0000;
+}
+
+void set_color_blue() {
+  fb_global.current_color=0x0000ff;
+}
+
+void flipscreen() {
+  memcpy(fb_global.buf,fb_global.backbuf,fb_global.fblen);//
+}
+
+void set_aspect_ratio() {
+ //XSizeHints *hints=XAllocSizeHints();
+ //hints->min_aspect.x=AR_W*(gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1));
+ //hints->min_aspect.y=AR_H;
+ //hints->max_aspect.x=AR_W*(gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1));
+ //hints->max_aspect.y=AR_H;
+ //hints->flags |= PAspect;
+ //XSetWMNormalHints(x11_global.dpy,x11_global.w,hints);
+ //XFree(hints);
+}
+
+void set_demands_attention() {
+ //XWMHints *hints=XGetWMHints(x11_global.dpy,x11_global.w);
+ //if(!hints) hints=XAllocWMHints();
+ //hints->flags |= XUrgencyHint;
+ //XSetWMHints(x11_global.dpy,x11_global.w,hints);
+ //XFree(hints);
+}
+
+#endif
+
+int graphics_sub_init() {
+  int i;
+  int x,y;
+  fb_global.fb=open("/dev/fb0",O_RDWR);
+  fb_global.kb=open("/dev/input/event0",O_RDWR);
+  memset(fb_global.keystate,0,sizeof(fb_global.keystate));
+  fcntl(fb_global.kb,F_SETFL,O_NONBLOCK);
+  assert(fb_global.fb > 0);
+  assert( 0 == ioctl(fb_global.fb,FBIOGET_VSCREENINFO,&fb_global.info));
+  fb_global.fblen = 4 * fb_global.info.xres * fb_global.info.yres;
+  fb_global.buf = mmap(NULL,fb_global.fblen,PROT_READ | PROT_WRITE,MAP_SHARED, fb_global.fb,0);
+  fb_global.backbuf = malloc(fb_global.fblen);
+  assert(fb_global.buf != MAP_FAILED);
+  //now... how to generate 200 greys....
+  //heh.
+  for(x=0;x<fb_global.info.xres;x++) {
+   for(y=0;y<fb_global.info.yres;y++) {
+    fb_global.current_color=rand();
+    draw_cs_point(x,y);
+   }
+  }
+  flipscreen();
+  gra_global.width=fb_global.info.xres;
+  gra_global.height=fb_global.info.yres;
+  return 0;
+}
+
+/* this need a framebuffer equivalent
+ for(i=0;i<=100;i++) {
+  snprintf(tmp,sizeof(tmp),"gray%d",i);
+  XAllocNamedColor(x11_global.dpy,x11_global.color_map,tmp,&x11_global.colors[i],&x11_global.colors[i]);
+ }
+ return 0;//we're fine
+}
+*/
+
+//    printf("  %d <-- len\t:code:%d\tvalue:%d\ttype:%d\n",l,ie.code,ie.value,ie.type);
+
+#define KEY_IS_DOWN(a) (fb_global.keystate[a/8] & (1<< (a % 8)))
+
+int graphics_event_handler(int world_changed) { //should calling draw_screen be in here?
+ int redraw=0;
+  char line[2048];
+  char line2[1025];
+  int len;
+ struct input_event ie;
+ memset(&ie,0,sizeof(ie));
+ int l;
+  real tmpx;
+  real tmpz;
+  radians tmprad;
+  radians tmprad2;
+  int i;
+ //update the keystates...
+ ioctl(fb_global.kb,EVIOCGKEY(sizeof(fb_global.keystate)),fb_global.keystate);//update keystate
+ if(KEY_IS_DOWN(KEY_ESC)) exit(0);
+ if(KEY_IS_DOWN(KEY_ENTER)) {
+      snprintf(line,sizeof(line)-1,"%s action %s\n",global.user,global.selected_object);
+      selfcommand(line);
+ }
+ if(KEY_IS_DOWN(KEY_UP)) {
+      tmprad=d2r((degrees){global.camera.r.y.d});//if the angle is 0...
+      tmprad2=d2r((degrees){global.camera.r.y.d});
+      tmpx=WALK_SPEED*sin(tmprad.r);//cos(0)==1
+      tmpz=WALK_SPEED*cos(tmprad2.r);//sin(0)==0
+      snprintf(line,sizeof(line)-1,"%s move %f 0 %f\n",global.user,tmpx,tmpz);
+      selfcommand(line);
+ }
+ if(KEY_IS_DOWN(KEY_DOWN)) {
+      tmprad=d2r((degrees){global.camera.r.y.d+180});
+      tmprad2=d2r((degrees){global.camera.r.y.d+180});
+      tmpx=WALK_SPEED*sin(tmprad.r);
+      tmpz=WALK_SPEED*cos(tmprad2.r);
+      snprintf(line,sizeof(line)-1,"%s move %f 0 %f\n",global.user,tmpx,tmpz);
+      selfcommand(line);
+ }
+ if(KEY_IS_DOWN(KEY_LEFT)) {
+      tmprad=d2r((degrees){global.camera.r.y.d+90});
+      tmprad2=d2r((degrees){global.camera.r.y.d+90});
+      tmpx=WALK_SPEED*sin(tmprad.r);
+      tmpz=WALK_SPEED*cos(tmprad2.r);
+      snprintf(line,sizeof(line)-1,"%s move %f 0 %f\n",global.user,tmpx,tmpz);
+      selfcommand(line);
+ }
+     if(KEY_IS_DOWN(KEY_RIGHT)) {
+      tmprad=d2r((degrees){global.camera.r.y.d+270});
+      tmprad2=d2r((degrees){global.camera.r.y.d+270});
+      tmpx=WALK_SPEED*sin(tmprad.r);
+      tmpz=WALK_SPEED*cos(tmprad2.r);
+      snprintf(line,sizeof(line)-1,"%s move %f 0 %f\n",global.user,tmpx,tmpz);
+      selfcommand(line);
+      }
+     if(KEY_IS_DOWN(KEY_W)) {
+      snprintf(line,sizeof(line)-1,"%s move 0 1 0\n",global.user);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_S)) {
+      snprintf(line,sizeof(line)-1,"%s move 0 -1 0\n",global.user);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_R)) {
+      snprintf(line,sizeof(line)-1,"%s rotate %d 0 0\n",global.user,global.camera.r.x.d+ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_Y)) {
+      snprintf(line,sizeof(line)-1,"%s rotate %d 0 0\n",global.user,global.camera.r.x.d-ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_Q)) {
+      snprintf(line,sizeof(line)-1,"%s rotate 0 %d 0\n",global.user,global.camera.r.y.d+ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_E)) {
+      snprintf(line,sizeof(line)-1,"%s rotate 0 %d 0\n",global.user,global.camera.r.y.d-ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_U)) {
+      snprintf(line,sizeof(line)-1,"%s rotate 0 0 %d\n",global.user,global.camera.r.z.d+ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_O)) {
+      snprintf(line,sizeof(line)-1,"%s rotate 0 0 %d\n",global.user,global.camera.r.z.d-ROTATE_STEP);
+      selfcommand(line);
+     }
+     if(KEY_IS_DOWN(KEY_P)) gra_global.split+=.1;
+     if(KEY_IS_DOWN(KEY_L)) gra_global.split-=.1;
+     if(KEY_IS_DOWN(KEY_Z)) global.zoom+=1;
+     if(KEY_IS_DOWN(KEY_X)) {
+      global.zoom-=1;
+      if(global.zoom < 1) global.zoom=1;
+     }
+     if(KEY_IS_DOWN(KEY_C)) global.mmz*=1.1;
+     if(KEY_IS_DOWN(KEY_V)) global.mmz/=1.1;
+     if(KEY_IS_DOWN(KEY_H)) global.split+=1;
+     if(KEY_IS_DOWN(KEY_J)) global.split-=1;
+     if(KEY_IS_DOWN(KEY_6)) gra_global.maxshapes+=10;
+     if(KEY_IS_DOWN(KEY_7)) gra_global.maxshapes-=10;
+     if(KEY_IS_DOWN(KEY_D)) global.debug ^= 1;
+     if(KEY_IS_DOWN(KEY_F)) global.derp ^= 1;
+     if(KEY_IS_DOWN(KEY_M)) {
+      gra_global.drawminimap += 1;
+      gra_global.drawminimap %= 4;
+     }
+     if(KEY_IS_DOWN(KEY_A)) gra_global.drawsky ^= 1;
+     if(KEY_IS_DOWN(KEY_3)) {
+      gra_global.draw3d += 1;
+      gra_global.draw3d %= 4;
+     }
+//LONG comment. then rest of function. don't end it too early, derp.
+/*
+    }
+    break;
+   default:
+    switch(sym) {
+     case XK_Return:
+      strcpy(line,"\n");
+      len=1;
+      break;
+     case XK_Left://hack. probably just replace this with printf()s
+      strcpy(line,"\x1b[D");
+      len=3;
+      break;
+     case XK_Right:
+      strcpy(line,"\x1b[C");
+      len=3;
+      break;
+     case XK_Down:
+      strcpy(line,"\x1b[B");
+      len=3;
+      break;
+     case XK_Up:
+      strcpy(line,"\x1b[A");
+      len=3;
+      break;
+     default:
+      len=XLookupString(xkey,line,1023,NULL,NULL);
+      break;
+    }
+    for(i=0;i/2 < len;i++) line2[i]="0123456789abcdef"[(line[i/2]>>(4*(1-(i%2)))) % 16];
+    line2[i]=0;
+    printf("%s data %s\n",global.user,line2);
+    break;
+ }
+
+ //then do stuff based on what keystates are set.
+ //... loop over the whole array?
+ //have an array of deltas?
+ //what sets mask?
+ char motionnotify=0;
+ unsigned int mask;
+ if(global.beep) {
+  global.beep=0;
+  XBell(x11_global.dpy,1000);
+  set_demands_attention();
+ }
+ while(XPending(x11_global.dpy)) {//these are taking too long?
+  XNextEvent(x11_global.dpy, &e);
+//     fprintf(stderr,"# handling event with type: %d\n",e.type);
+  switch(e.type) {
+//       case Expose:
+//         if(e.xexpose.count == 0) redraw=1;
+//         break;
+    case MotionNotify:
+      if(global.debug >= 2) fprintf(stderr,"# MotionNotify\n");
+      motionnotify=1;
+      break;
+    case ButtonPress:
+      if(global.debug >= 2) fprintf(stderr,"# ButtonPress\n");
+      redraw=1;
+      gra_global.buttonpressed=e.xbutton.button;//what's this for? mouse?
+      break;
+    case ButtonRelease:
+      if(global.debug >= 2) fprintf(stderr,"# ButtonRelease\n");
+      redraw=1;
+      gra_global.buttonpressed=0;//what's this for???
+      break;
+    case ConfigureNotify:
+      if(global.debug >= 2) fprintf(stderr,"# ConfigureNotify\n");
+      redraw=1;
+      XGetGeometry(x11_global.dpy,x11_global.w,&root,&global.x,&global.y,&gra_global.width,&gra_global.height,&gra_global.border_width,&gra_global.depth);
+      if(gra_global.height * AR_W / AR_H != gra_global.width / (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1))) {
+       // height / AR_H * AR_W = width / (ss / (rab ? ss : 1))
+       if(global.debug >= 2) {
+        fprintf(stderr,"# %d != %d for some reason. probably your WM not respecting aspect ratio hints or calculating based on them differently. (would cause an off-by-one or so)\n",gra_global.height * AR_W / AR_H , gra_global.width / (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1)));
+       }
+       if(gra_global.width / (gra_global.red_and_blue ? 1 : gra_global.split_screen) * AR_H / AR_W < gra_global.height) {
+        gra_global.height=gra_global.width / (gra_global.red_and_blue ? 1 : gra_global.split_screen) * AR_H / AR_W;
+       } else {
+        gra_global.width=gra_global.height * AR_W / AR_H * (gra_global.red_and_blue ? 1 : gra_global.split_screen);
+       }
+      }
+      gra_global.mapxoff=gra_global.width/(gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1))/2;
+      gra_global.mapyoff=gra_global.height/2;
+      break;
+    case KeyPress:
+      if(global.debug >= 2) fprintf(stderr,"# KeyPress\n");
+      redraw=1;
+      x11_keypress_handler(&e.xkey,gra_global.mousex,gra_global.mousey);
+      break;
+    default:
+//      fprintf(stderr,"# received unknown event with type: %d\n",e.type);
+      break;
+  }
+ }
+ if(motionnotify) {
+  XQueryPointer(x11_global.dpy,x11_global.w,&root,&child,&gra_global.rmousex,&gra_global.rmousey,&gra_global.mousex,&gra_global.mousey,&mask);
+  redraw=1;
+ }
+*/
+ if(redraw || world_changed) { 
+  gra_global.input_mode=0;
+  draw_screen();//includes its own flip.
+ }
+ return 1;//redraw;
+}
-- 
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