From ebde46bc82bebf478db67abef5b7dc88c014706b Mon Sep 17 00:00:00 2001
From: epoch <epoch@hacking.allowed.org>
Date: Tue, 3 Jan 2017 00:30:28 -0600
Subject: lots and lots of shit. opengl shit is barely worked on. new pl script
 to obj2hackvr using more than just
 triangles.http://hackaday.com/blog/http://hackaday.com/blog/

---
 src/graphics_x11.c | 448 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 448 insertions(+)
 create mode 100644 src/graphics_x11.c

(limited to 'src/graphics_x11.c')

diff --git a/src/graphics_x11.c b/src/graphics_x11.c
new file mode 100644
index 0000000..1b31664
--- /dev/null
+++ b/src/graphics_x11.c
@@ -0,0 +1,448 @@
+#define _POSIX_C_SOURCE 200809L //for fileno and strdup
+#define _BSD_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <stdlib.h>
+//#include <sys/select.h> //code to use select instead of non-blocking is commented out. might decide to use it later.
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/cursorfont.h>
+#include <X11/Xutil.h> //for size hints
+#include <time.h>
+#define __USE_GNU //for longer math constants
+#include <math.h>
+
+#include "config.h"
+#include "common.h"
+#include "graphics.h"
+#include "graphics_x11.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 x11_global x11_global;
+
+#ifdef GRAPHICAL
+
+void draw_cs_line(cs_t p1,cs_t p2) {
+  XDrawLine(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p1.x,p1.y,p2.x,p2.y);
+}
+
+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.
+  int i;
+  if(gra_global.draw3d == 1) { //wireframe
+    for(i=0;i<s.len+(s.len==1);i++) {//this shape is closed!
+      draw_cs_line(s.p[i],s.p[(i+1)%(s.len+(s.len==1))]);
+    }
+  }
+  if(gra_global.draw3d == 2) { //filled in
+    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};
+    }
+    XFillPolygon(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,Xp,s.len,Convex,CoordModeOrigin);
+  }
+}
+
+//this needs to be taken out of this file and left to graphics.c
+#if 0
+void draw_c3_shape(c3_s_t s) {
+// char line[1024];
+ int i=0;
+ int h;//,w
+ XPoint p[s.len+(s.len==1)];
+ cs_t tmp;
+ for(i=0;i<s.len+(s.len==1);i++) {
+  tmp=c3_to_cs(s.p[i]);
+  p[i]=(XPoint){tmp.x,tmp.y};
+ }
+ if(global.draw3d == 1) { // wireframe
+  switch(s.len) {
+   case 1:
+    //w=max(p[0].x,p[1].x)-min(p[0].x,p[1].x);
+    h=max(p[0].y,p[1].y)-min(p[0].y,p[1].y);
+    p[0].x-=h;
+    p[0].y-=h;
+    XDrawArc(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p[0].x,p[0].y,h*2,h*2,0,360*64);
+    break;
+   case 2:
+    XDrawLine(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p[0].x,p[0].y,p[1].x,p[1].y);
+    break;
+   default:
+    for(i=0;i<s.len;i++) {
+     XDrawLines(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p,s.len,CoordModeOrigin);
+    }
+    break;
+  }
+ }
+ if(global.draw3d == 2) { //draw it filled in
+  switch(s.len) {
+   case 1:
+    //w=max(p[0].x,p[1].x)-min(p[0].x,p[1].x);
+    h=max(p[0].y,p[1].y)-min(p[0].y,p[1].y);
+    p[0].x-=h;
+    p[0].y-=h;
+    XFillArc(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p[0].x,p[0].y,h*2,h*2,0,360*64);
+    break;
+   case 2:
+    XDrawLine(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p[0].x,p[0].y,p[1].x,p[1].y);
+    break;
+   default:
+    XFillPolygon(x11_global.dpy,x11_global.backbuffer,x11_global.backgc,p,s.len,Convex,CoordModeOrigin);
+    break;
+  }
+ }
+// if(global.draw3d == 3) { //hashed
+//  XSetForeground(x11_global.dpy, x11_global.backgc, global.colors[0].pixel);
+  //XDrawFilledShape(c3_to_cs(t.p1),c3_to_cs(t.p2),c3_to_cs(t.p3));//clear out this triangle.
+//  XSetForeground(x11_global.dpy, x11_global.backgc, global.green.pixel);
+  //upgrade me! DrawHatchedTriangle(t,10 - (shitdist(t,camera.p) / 10));//how to get density?
+// }
+/* if(global.debug) {
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p1.x,t.p1.y,t.p1.z);
+  draw_c3_text(t.p1,line);
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p2.x,t.p2.y,t.p2.z);
+  draw_c3_text(t.p2,line);
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p3.x,t.p3.y,t.p3.z);
+  draw_c3_text(t.p3,line);
+*/
+// }
+}
+#endif
+
+//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);
+}
+
+void set_clipping_rectangle(int x,int y,int width,int height) {
+  XRectangle cliprect;
+  cliprect.x=x;
+  cliprect.y=y;
+  cliprect.width=width;
+  cliprect.height=height;
+  XSetClipRectangles(x11_global.dpy,x11_global.backgc,x,y,&cliprect,1,Unsorted);
+}
+
+void red_and_blue_magic() {
+  XGCValues gcval;
+  gcval.function=GXor;
+  XChangeGC(x11_global.dpy,x11_global.backgc,GCFunction,&gcval);
+}
+
+void draw_sky() {
+  XCopyArea(x11_global.dpy,skypixmap,x11_global.backbuffer,x11_global.backgc,((camera.yr*5)+SKYW)%SKYW,0,WIDTH,gra_global.height/2,0,0);
+}
+
+void set_color() {
+  XSetForeground(x11_global.dpy,x11_global.backgc,x11_global.green.pixel);
+}
+
+void flipscreen() {
+  XCopyArea(x11_global.dpy,x11_global.backbuffer,x11_global.w,x11_global.gc,0,0,gra_global.width,gra_global.height,0,0);
+}
+
+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);
+}
+
+int keypress_handler(int sym) {
+  char line[1024];
+  real tmpx;
+//  real tmpy; //unused atm
+  real tmpz;
+  switch(sym) {
+   case XK_Return:
+    snprintf(line,sizeof(line)-1,"%s action %s\n",global.user,global.selected_object);
+    selfcommand(line);
+    break;
+   case XK_Up:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+90));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+90));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Down:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+270));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+270));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Left:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Right:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+180));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+180));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_w:
+    camera.p.y+=1;
+    snprintf(line,sizeof(line)-1,"%s move 0 1 0 0 0 0 0 0 0\n",global.user);
+    selfcommand(line);
+    break;
+   case XK_s:
+    camera.p.y-=1;
+    snprintf(line,sizeof(line)-1,"%s move 0 -1 0 0 0 0 0 0 0\n",global.user);
+    selfcommand(line);
+    break;
+   case XK_r:
+    camera.xr+=5;
+    while(camera.xr > 360) camera.xr-=360;
+    break;
+   case XK_y:
+    camera.xr-=5;
+    while(camera.xr < 0) camera.xr+=360;
+    break;
+   case XK_q:
+    camera.yr+=5;
+    while(camera.yr > 360) camera.yr-=360;
+    break;
+   case XK_e:
+    camera.yr-=5;
+    while(camera.yr < 0) camera.yr+=360;
+    break;
+   case XK_u:
+    camera.zr+=5;
+    while(camera.zr > 360) camera.zr-=360;
+    break;
+   case XK_o:
+    camera.zr-=5;
+    while(camera.zr < 0) camera.zr+=360;
+    break;
+   case XK_z: camera.zoom+=1; break;
+   case XK_x: camera.zoom-=1; break;
+   case XK_c: global.mmz*=1.1; break;
+   case XK_v: global.mmz/=1.1; break;
+   case XK_h: global.split+=1; break;
+   case XK_j: global.split-=1; break;
+   case XK_d:
+    global.debug ^= 1;
+    break;
+   case XK_f:
+    global.derp ^= 1;
+    break;
+   case XK_m:
+    gra_global.drawminimap += 1;
+    gra_global.drawminimap %= 4;
+    break;
+   case XK_a:
+    gra_global.drawsky ^= 1;
+    break;
+   case XK_3:
+    gra_global.draw3d += 1;
+    gra_global.draw3d %= 4;
+    break;
+   case XK_Escape:
+    return -1;
+   default:
+    return 0;
+    break;
+ }
+ return 1;
+}
+#endif
+
+int graphics_init() {
+ int i,j;
+ char tmp[64];
+ Cursor cursor;
+ XSetWindowAttributes attributes;
+// Window root,child;//why do I have this?
+//  XColor toss;
+ printf("# Opening X Display... (%s)\n",getenv("DISPLAY"));
+ if((x11_global.dpy = XOpenDisplay(0)) == NULL) return printf("# failure.\n"),2;
+ else printf("# done.\n");
+ x11_global.color_map=DefaultColormap(x11_global.dpy, DefaultScreen(x11_global.dpy));
+ printf("# generating grays...\n");
+ 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]);
+ }
+ printf("# done.\n");
+ assert(x11_global.dpy);
+ gra_global.split_screen=SPLIT_SCREEN;
+ gra_global.split_flip=-1;
+ gra_global.split=5;
+ x11_global.root_window=0;
+ gra_global.red_and_blue=RED_AND_BLUE;
+ //global.colors[0]=BlackPixel(x11_global.dpy,DefaultScreen(x11_global.dpy));
+// int whiteColor = //WhitePixel(x11_global.dpy, DefaultScreen(x11_global.dpy));
+ attributes.background_pixel=x11_global.colors[0].pixel;
+ if(x11_global.root_window) {
+  x11_global.w = DefaultRootWindow(x11_global.dpy); //this is still buggy.
+ } else {
+  x11_global.w = XCreateWindow(x11_global.dpy,DefaultRootWindow(x11_global.dpy),0,0,WIDTH*(gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1)),HEIGHT,1,DefaultDepth(x11_global.dpy,DefaultScreen(x11_global.dpy)),InputOutput,DefaultVisual(x11_global.dpy,DefaultScreen(x11_global.dpy))\
+                   ,CWBackPixel, &attributes);
+  set_aspect_ratio();
+  XSelectInput(x11_global.dpy, x11_global.w, PointerMotionMask|StructureNotifyMask|ButtonPressMask|ButtonReleaseMask|KeyPressMask|ExposureMask);
+ }
+ XMapWindow(x11_global.dpy,x11_global.w);
+ XStoreName(x11_global.dpy,x11_global.w,"hackvr");
+ gra_global.greyscale=1;
+ gra_global.zsort=1;
+ global.shape[0]=0;//we'll allocate as we need more.
+ x11_global.gc=XCreateGC(x11_global.dpy,x11_global.w, 0, 0);
+
+ if(gra_global.red_and_blue) {
+  gra_global.width=WIDTH;
+ } else {
+  gra_global.width=WIDTH*gra_global.split_screen;
+ }
+ gra_global.height=HEIGHT;
+
+ x11_global.backbuffer=XCreatePixmap(x11_global.dpy,x11_global.w,gra_global.width,gra_global.height,DefaultDepth(x11_global.dpy,DefaultScreen(x11_global.dpy)));
+ x11_global.cleanbackbuffer=XCreatePixmap(x11_global.dpy,x11_global.w,gra_global.width,gra_global.height,DefaultDepth(x11_global.dpy,DefaultScreen(x11_global.dpy)));
+
+//backbuffer is uninitialized
+ x11_global.backgc=XCreateGC(x11_global.dpy,x11_global.backbuffer,0,0);
+
+ cursor=XCreateFontCursor(x11_global.dpy,XC_crosshair);
+ XDefineCursor(x11_global.dpy, x11_global.w, cursor);
+
+ XAllocNamedColor(x11_global.dpy, x11_global.color_map, "green", &x11_global.green, &x11_global.green);
+ XAllocNamedColor(x11_global.dpy, x11_global.color_map, "red", &x11_global.red, &x11_global.red);
+ XAllocNamedColor(x11_global.dpy, x11_global.color_map, "blue", &x11_global.blue, &x11_global.blue);
+ XAllocNamedColor(x11_global.dpy, x11_global.color_map, "red", &x11_global.redblue[0], &x11_global.redblue[0]);
+ XAllocNamedColor(x11_global.dpy, x11_global.color_map, "blue", &x11_global.redblue[1], &x11_global.redblue[1]);
+ XSetForeground(x11_global.dpy, x11_global.gc, x11_global.green.pixel);
+ XSetForeground(x11_global.dpy, x11_global.backgc, x11_global.colors[0].pixel);//black. we're about to draw the blank background using this.
+ XSetBackground(x11_global.dpy, x11_global.gc, x11_global.colors[160].pixel);
+ XSetBackground(x11_global.dpy, x11_global.backgc, x11_global.colors[140].pixel);
+
+ XFillRectangle(x11_global.dpy, x11_global.cleanbackbuffer,x11_global.backgc,0,0,gra_global.width,gra_global.height);
+ XSetForeground(x11_global.dpy, x11_global.backgc,x11_global.green.pixel);
+
+//  XSetForeground(x11_global.dpy, gc, whiteColor);
+// this was taking a "long" time.
+ printf("# generating sky... ");
+ skypixmap=XCreatePixmap(x11_global.dpy,x11_global.w,SKYW,SKYH,DefaultDepth(x11_global.dpy,DefaultScreen(x11_global.dpy)));
+ for(i=0;i<SKYH;i++) {
+  for(j=0;j<SKYW;j++) {
+   if(i==0) sky[i][j]=rand()%2;
+   else {
+    sky[i][j]=(SKYRULE >> ((!!sky[i-1][(j+(SKYW)-1)%(SKYW)]<<2) | (!!sky[i-1][j]<<1) | (!!sky[i-1][j+1%(SKYW)])) & 1);
+    if(sky[i][j]) {
+     XDrawPoint(x11_global.dpy,skypixmap,x11_global.backgc,j,i);
+    }
+   }
+  }
+ }
+ printf("done.\n");
+
+ gra_global.mapxoff=gra_global.width/2;
+ gra_global.mapyoff=gra_global.height/2;
+ gra_global.drawminimap=0;
+ gra_global.draw3d=1;
+ gra_global.force_redraw=FORCE_REDRAW;//use this for checking proper fps I guess.
+ camera.zoom=30.0l;
+ camera.xr=270;
+ camera.yr=270;
+ camera.zr=0;
+ global.mmz=1;
+ camera.p.x=0;
+ camera.p.z=6;
+ camera.p.y=5;
+ return 0;
+}
+
+int graphics_event_handler() {
+ int redraw=0;
+ XEvent e;
+ Window child,root;
+ //what sets mask?
+ unsigned int mask;
+ while(XPending(x11_global.dpy)) {//these are taking too long?
+  XNextEvent(x11_global.dpy, &e);
+//     printf("# handling event with type: %d\n",e.type);
+  switch(e.type) {
+//       case Expose:
+//         if(e.xexpose.count == 0) redraw=1;
+//         break;
+    case 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;
+      break;
+    case ButtonPress:
+      redraw=1;
+      gra_global.buttonpressed=e.xbutton.button;//what's this for? mouse?
+      break;
+    case ButtonRelease:
+      redraw=1;
+      gra_global.buttonpressed=0;//what's this for???
+      break;
+    case ConfigureNotify:
+      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.width / (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1 )) / AR_W * AR_H != gra_global.height) {
+       if(gra_global.width / AR_W * AR_H == gra_global.height) {
+        printf("math doesn't work.\n");
+       }
+       printf("# DERPY WM CANT TAKE A HINT %d / %d / %d * %d = %d != %d\n",gra_global.width,gra_global.split_screen,gra_global.width / (gra_global.red_and_blue ? gra_global.split_screen : 1) / AR_W * AR_H,AR_W,AR_H,gra_global.height);
+       if(gra_global.width / (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1)) / AR_W * AR_H < gra_global.height) {
+        gra_global.height=gra_global.width / (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1)) / AR_W * AR_H;
+       } else {
+        gra_global.width=gra_global.height * AR_H / AR_W * (gra_global.split_screen / (gra_global.red_and_blue ? gra_global.split_screen : 1));
+       }
+      }
+      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:
+      redraw=1;
+      if(keypress_handler(XLookupKeysym(&e.xkey,0)) == -1) {
+       printf("# exiting\n");
+       return -1;
+      }
+      break;
+    default:
+      //printf("# received event with type: %d\n",e.type);
+      break;
+  }
+ }
+ return redraw;
+}
-- 
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