From 5e61f536e8d012122fedd2b625dcef269fca29ef Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Sun, 24 Nov 2019 21:18:02 -0500
Subject: [PATCH] gridinverse, gridswitch demos #16

---
 src/bin/demo.c |  2 +-
 src/bin/grid.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/src/bin/demo.c b/src/bin/demo.c
index 14d8a5454..2220b2432 100644
--- a/src/bin/demo.c
+++ b/src/bin/demo.c
@@ -85,7 +85,7 @@ int main(int argc, char** argv){
   if(ncplane_fg_rgb8(ncp, 176, 121, 176)){
     goto err;
   }
-  if(ncplane_bg_rgb8(ncp, 255, 255, 255)){
+  if(ncplane_bg_rgb8(ncp, 100, 100, 100)){
     goto err;
   }
   if(ncplane_putstr(ncp, str) != (int)strlen(str)){
diff --git a/src/bin/grid.c b/src/bin/grid.c
index 34ff018b7..3950677ac 100644
--- a/src/bin/grid.c
+++ b/src/bin/grid.c
@@ -1,11 +1,77 @@
 #include <unistd.h>
 #include "demo.h"
 
+static int
+gridswitch_demo(struct notcurses* nc, struct ncplane *n,
+                cell* ul, cell* uc, cell* ur,
+                cell* cl, cell* cc, cell* cr,
+                cell* ll, cell* lc, cell* lr){
+  // ncplane_erase(n);
+  int maxx, maxy;
+  notcurses_term_dimyx(nc, &maxy, &maxx);
+  int rs = 256 / maxx;
+  int gs = 256 / (maxx + maxy);
+  int bs = 256 / maxy;
+  int x = 0;
+  int y = 0;
+  if(ncplane_cursor_move_yx(n, y, x)){
+    return -1;
+  }
+  // top line
+  cell_set_fg(ul, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+  cell_set_bg(ul, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+  ncplane_putc(n, ul);
+  for(x = 1 ; x < maxx - 1 ; ++x){
+    cell_set_fg(uc, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+    cell_set_bg(uc, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+    ncplane_putc(n, uc);
+  }
+  cell_set_fg(ur, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+  cell_set_bg(ur, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+  ncplane_putc(n, ur);
+
+  // center
+  x = 0;
+  for(y = 1 ; y < maxy - 1 ; ++y){
+    cell_set_fg(cl, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+    cell_set_bg(cl, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+    ncplane_putc(n, cl);
+    for(x = 1 ; x < maxx - 1 ; ++x){
+      cell_set_fg(cc, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+      cell_set_bg(cc, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+      ncplane_putc(n, cc);
+    }
+    cell_set_fg(cr, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+    cell_set_bg(cr, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+    ncplane_putc(n, cr);
+  }
+
+  // bottom line
+  x = 0;
+  cell_set_fg(ll, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+  cell_set_bg(ll, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+  ncplane_putc(n, ll);
+  for(x = 1 ; x < maxx - 1 ; ++x){
+    cell_set_fg(lc, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+    cell_set_bg(lc, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+    ncplane_putc(n, lc);
+  }
+  cell_set_fg(lr, 255 - rs * y, 255 - gs * (x + y), 255 - bs * x);
+  cell_set_bg(lr, 255 - rs * x, 255 - gs * (x + y), 255 - bs * y);
+  ncplane_putc(n, lr);
+
+  // render!
+  notcurses_render(nc);
+  sleep(5);
+  return 0;
+}
+
 static int
 gridinv_demo(struct notcurses* nc, struct ncplane *n,
              cell* ul, cell* uc, cell* ur,
              cell* cl, cell* cc, cell* cr,
              cell* ll, cell* lc, cell* lr){
+  // ncplane_erase(n);
   int maxx, maxy;
   notcurses_term_dimyx(nc, &maxy, &maxx);
   int rs = 256 / maxx;
@@ -62,7 +128,7 @@ gridinv_demo(struct notcurses* nc, struct ncplane *n,
   // render!
   notcurses_render(nc);
   sleep(1);
-  return 0;
+  return gridswitch_demo(nc, n, ul, uc, ur, cl, cc, cr, ll, lc, lr);
 }
 
 // red across, blue down, green from UL to LR
@@ -74,6 +140,7 @@ int grid_demo(struct notcurses* nc){
   int bs = 256 / maxy;
   int y, x;
   struct ncplane* n = notcurses_stdplane(nc);
+  // ncplane_erase(n);
   cell ul, ll, cl, cr, lc, lr, ur, uc, cc;
   cell_init(&ul);
   cell_init(&uc);