Move draw_background to own file graphics.h.

implementations/uvm-ncc/graphics.h

@@ -0,0 +1,15 @@
+
+void
+draw_background(u32* buffer, size_t w, size_t h)
+{
+	for (size_t x = 0; x < w; ++x) {
+		for (size_t y = 0; y < h; ++y) {
+			u32* pix_ptr = frame_buffer + w * y + x;
+			u8 blue = x & 255;
+			u8 green = y & 255;
+			u8 red = (x + y + 128) & 255;
+			u8 alpha = 123;
+			*pix_ptr = (alpha << 24) | (red << 16) | (green << 8) | blue;
+		}
+	}
+}

implementations/uvm-ncc/not_a_makefile.txt

@@ -1,10 +0,0 @@
-setenv UVM_JOY $HOME/src/Joypy/implementations/uvm-ncc
-setenv UVM $HOME/src/uvm
-setenv UVM_NCC $UVM/ncc
-setenv UVM_VM $UVM/vm
-
-cd $UVM_NCC
-cargo run $UVM_JOY/xerblin.c
-cd $UVM_VM
-cargo run $UVM_NCC/out.asm
-cd $UVM_JOY

implementations/uvm-ncc/xerblin.c

@@ -1,6 +1,7 @@
 #include <uvm/syscalls.h>
 #include <uvm/utils.h>
 #include "/home/sforman/src/Joypy/implementations/uvm-ncc/font/font.h"
+#include "/home/sforman/src/Joypy/implementations/uvm-ncc/graphics.h"
 
 #define   RED 0xFF_00_00
 #define GREEN 0x00_FF_00
@@ -39,21 +40,6 @@ draw_char(u8 ch, u64 dest_x, u64 dest_y)
 	}
 }
 
-void
-draw_background()
-{
-	for (size_t x = 0; x < FRAME_WIDTH; ++x) {
-		for (size_t y = 0; y < FRAME_HEIGHT; ++y) {
-			u32* pix_ptr = frame_buffer + FRAME_WIDTH * y + x;
-			u8 blue = x & 255;
-			u8 green = y & 255;
-			u8 red = (x + y + 128) & 255;
-			u8 alpha = 123;
-			*pix_ptr = (alpha << 24) | (red << 16) | (green << 8) | blue;
-		}
-	}
-}
-
 
 //void
 //keydown(u64 window_id, u16 keycode)
@@ -76,7 +62,7 @@ main()
 {
 	init_font_data();
 	wid = window_create(FRAME_WIDTH, FRAME_HEIGHT, "Bouncing Ball Example", 0);
-	draw_background();
+	draw_background(frame_buffer, FRAME_WIDTH, FRAME_HEIGHT);
 	for (size_t ch = 0; ch < 94; ++ch) {
 		draw_char(
 			ch,