From 07e163349f9251a5e9c10aba6e080c73da0481f3 Mon Sep 17 00:00:00 2001
From: epoch <epoch@hacking.allowed.org>
Date: Fri, 17 Jul 2020 04:05:11 -0500
Subject: experimental svg output

---
 src/graphics_cs_svg.c | 270 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 270 insertions(+)
 create mode 100644 src/graphics_cs_svg.c

diff --git a/src/graphics_cs_svg.c b/src/graphics_cs_svg.c
new file mode 100644
index 0000000..305ad39
--- /dev/null
+++ b/src/graphics_cs_svg.c
@@ -0,0 +1,270 @@
+#define _POSIX_C_SOURCE 200809L //for fileno and strdup
+#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>
+
+#include "config.h"
+#include "math.h"
+#include "common.h"
+#include "graphics_c3.h"//not needed?
+#include "graphics_svg.h"
+#include "graphics_c2.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 hvr_global global;
+extern struct gra_global gra_global;
+struct svg_global svg_global;
+
+#ifdef GRAPHICAL
+
+void set_luminosity_color(int lum) {
+  svg_global.foreground_color=svg_global.colors[lum%100];
+}
+
+
+void draw_cs_line(cs_t p1,cs_t p2) {
+  char tmp[1024];
+  snprintf(tmp,sizeof(tmp)-1,"<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke=\"%s\" />\n"
+                                    ,p1.x     ,p1.y     ,p2.x     ,p2.y         ,svg_global.foreground_color);
+  strcat(svg_global.backbuffer,tmp);
+}
+
+void draw_cs_text(cs_t p,char *text) {//lol. I don't even use this anymore.
+/* 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.
+  char tmp[1024];
+  //cs_t smouse=c2_to_cs(gra_global.mouse);
+  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:
+    break;
+   default:
+    strcat(svg_global.backbuffer,"<polygon points=\"");
+    for(i=0;i<s.len+(s.len==1);i++) {//this shape is closed!
+      snprintf(tmp,sizeof(tmp)-1,"%d,%d",s.p[i].x,s.p[i].y);
+      strcat(svg_global.backbuffer,tmp);
+      if(i != s.len-1) strcat(svg_global.backbuffer," ");//only print space after points that have a point after them.
+    }
+    snprintf(tmp,sizeof(tmp)-1,"\" fill=\"dark%s\" stroke=\"%s\" />\n",svg_global.foreground_color,svg_global.foreground_color);
+    strcat(svg_global.backbuffer,tmp);
+    break;
+  }
+}
+
+void draw_cs_filled_shape(cs_s_t s) {
+  int i;
+  char tmp[1024];
+  switch(s.len) {
+   case 1:
+    break;
+   default:
+    strcat(svg_global.backbuffer,"<polygon points=\"");
+    for(i=0;i<s.len+(s.len==1);i++) {//this shape is closed!
+      snprintf(tmp,sizeof(tmp)-1,"%d,%d",s.p[i].x,s.p[i].y);
+      strcat(svg_global.backbuffer,tmp);
+      if(i != s.len-1) strcat(svg_global.backbuffer," ");//only print space after points that have a point after them.
+    }
+    snprintf(tmp,sizeof(tmp)-1,"\" fill=\"%s\" stroke=\"%s\" />\n",svg_global.foreground_color,svg_global.foreground_color);
+    strcat(svg_global.backbuffer,tmp);
+    break;
+  }
+}
+
+//should I do clipping in each graphics lib or make graphics.c just have clipping stuff?
+void clear_backbuffer() {
+//  strcpy(svg_global.backbuffer,"<?xml version=\"1.0\" standalone=\"no\">\n");
+  strcpy(svg_global.backbuffer,"<html><head><meta http-equiv=\"refresh\" content=\"0\" /></head><body>\n");
+  strcat(svg_global.backbuffer,"<svg width=\"1024\" height=\"768\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n");
+}
+
+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() {
+/*
+  XGCValues gcval;
+  gcval.function=GXcopy;
+  XChangeGC(x11_global.dpy,x11_global.backgc,GCFunction,&gcval);
+*/
+}
+
+void draw_mode_and() {
+/*
+  XGCValues gcval;
+  gcval.function=GXand;
+  XChangeGC(x11_global.dpy,x11_global.backgc,GCFunction,&gcval);
+*/
+}
+
+void draw_mode_or() {
+/*
+  XGCValues gcval;
+  gcval.function=GXor;
+  XChangeGC(x11_global.dpy,x11_global.backgc,GCFunction,&gcval);
+*/
+}
+
+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_color_snow() {
+  //x11_global.snow=1;//override foreground color in the draw functions. drawing different grey each time.
+}
+
+void set_ansi_color(int i) {
+  svg_global.foreground_color=svg_global.ansi_color[i];
+}
+
+void set_color() {
+  svg_global.foreground_color=svg_global.green;
+}
+
+void set_color_red() {
+  svg_global.foreground_color=svg_global.red;
+}
+
+void set_color_blue() {
+  svg_global.foreground_color=svg_global.blue;
+}
+
+void flipscreen() {
+  fprintf(stderr,"# flipping screen!\n");
+//  strcat(svg_global.backbuffer,"</svg>\n</xml>\n");
+  strcat(svg_global.backbuffer,"</svg></body></html>\n");
+  int fd=open(svg_global.filename,O_TRUNC|O_WRONLY|O_CREAT);
+  write(fd,svg_global.backbuffer,strlen(svg_global.backbuffer));
+  close(fd);
+}
+
+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);
+*/
+}
+
+void set_title(char *t) {
+ //XStoreName(x11_global.dpy,x11_global.w,t);
+}
+
+int graphics_sub_init() {//this returns an fd we need to keep an eye one? :/
+ svg_global.filename="/tmp/hackvr.html";
+ svg_global.ansi_color[0]="black";
+ svg_global.ansi_color[1]="blue";
+ svg_global.ansi_color[2]="green";
+ svg_global.ansi_color[3]="cyan";
+ svg_global.ansi_color[4]="red";
+ svg_global.ansi_color[5]="magenta";
+ svg_global.ansi_color[6]="yellow";
+ svg_global.ansi_color[7]="white";
+ svg_global.ansi_color[8]=0;
+/* x11_global.fd=ConnectionNumber(x11_global.dpy);//we need to to pass to libidc
+ x11_global.color_map=DefaultColormap(x11_global.dpy, DefaultScreen(x11_global.dpy));
+ fprintf(stderr,"# generating colors...\n");
+ for(i=0;ansi_color[i];i++) {
+  XAllocNamedColor(x11_global.dpy,x11_global.color_map,ansi_color[i],&x11_global.ansi_color[i],&x11_global.ansi_color[i]);
+ }
+ 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]);
+ }
+ fprintf(stderr,"# done.\n");
+ assert(x11_global.dpy);
+ x11_global.root_window=0;
+ //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 {
+  fprintf(stderr,"# creating window...\n");
+  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);
+  fprintf(stderr,"# done. window id: %ld\n",x11_global.w);
+  set_aspect_ratio();
+  XSelectInput(x11_global.dpy, x11_global.w, HV_MOUSE_X11_EVENT_MASK|HV_X11_KB_EVENT_MASK|HV_GRAPHICS_X11_EVENT_MASK);
+ }
+ XMapWindow(x11_global.dpy,x11_global.w);
+ set_title("hackvr");//uses the globals to know what dpy and w
+ x11_global.gc=XCreateGC(x11_global.dpy,x11_global.w, 0, 0);
+ x11_global.backbuffer=XCreatePixmap(x11_global.dpy,x11_global.w,MAXWIDTH,MAXHEIGHT,DefaultDepth(x11_global.dpy,DefaultScreen(x11_global.dpy)));
+ x11_global.cleanbackbuffer=XCreatePixmap(x11_global.dpy,x11_global.w,MAXWIDTH,MAXHEIGHT,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);
+*/
+ svg_global.green="green";
+ svg_global.red="red";
+ svg_global.blue="blue";
+
+ return -1;//what do we return in svg's case?
+}
+
+void graphics_event_handler(struct shit *me,char *line) {//line should always be empty
+  redraw();
+}
+
+#endif
-- 
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