sixel graphics for test purposes

cli/CMakeLists.txt

@@ -13,6 +13,7 @@ add_executable(gb6
     ../src/lcd.c
     ../src/rom.c
     emulator.c
+    lcd_sixel.c
 )
 
 target_link_libraries(gb6 

cli/lcd_sixel.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <string.h>
+#include "../src/lcd.h"
+
+void lcd_draw(struct lcd *lcd)
+{
+  int x, y, yy;
+
+  puts("\033[2J\033[H"); // clear screen and move cursor to 0, 0
+  puts("\033Pq"); // enter sixel graphics mode
+  for (y = 0; y < LCD_HEIGHT; y += 6) {
+    for (x = 0; x < LCD_WIDTH; x++) {
+      int val = 63;
+      for (yy = 0; yy < 6; yy++) {
+        val += !lcd->pixels[(y + yy) * LCD_WIDTH + x] << yy;
+      }
+      putchar(val);
+    }
+    putchar('-');
+  }
+  // puts("#0;2;0;0;0#1;2;100;100;0#2;2;0;100;0");
+  // puts("#1~~@@vv@@~~@@~~$");
+  // puts("#2??}}GG}}??}}??-");
+  // puts("#1!14@");
+  puts("\033\\"); // leave graphics mode
+}
+
+int test_main(int argc, char *argv[])
+{
+  struct lcd lcd;
+  lcd_new(&lcd);
+  lcd_draw(&lcd);
+  return 0;
+}

src/lcd.h

@@ -40,4 +40,6 @@ void lcd_put_pixel(struct lcd *lcd, u8 x, u8 y, u8 value);
 // i feel like i'm going to need to call this every cycle and update regs
 void lcd_step(struct lcd *lcd);
 
+void lcd_draw(struct lcd *lcd);
+
 #endif