Include PNG images as data

1 files changed, 65 insertions, 0 deletions

diff --git a/example.asm b/example.asm
index 56afcba..73aa9a5 100644
--- a/example.asm
+++ b/example.asm
@@ -27,6 +27,10 @@ loop:
     inc b
     and b, 15
 
+    push b
+    call draw_sprite
+    pop b
+
     ; wait 1 second
     ld x, 60
 wait_loop:
@@ -55,3 +59,64 @@ fill_loop:
 
 int_handler:
     iret
+
+draw_sprite:
+    push y
+    ld y, 16
+    ld [sp + 0], y
+
+    ; src
+    ld a, >sprite
+    ld x, <sprite
+
+    ; dst
+    ld b, 0xdb
+    ld y, 56
+line:
+    push x
+    ld x, [a : x]
+    ld [b : y], x
+    pop x
+
+    inc x
+    bo
+    inc a
+
+    inc y
+
+    push y
+    ld y, [sp + 1]
+    dec y
+    ld [sp + 1], y
+    pop y
+
+    bnz
+    jmp line
+
+    add y, 112
+    bo
+    inc b
+
+    cmp x, <end_sprite
+    bnz
+    jmp next_row
+    cmp a, >end_sprite
+    bz
+    jmp done
+
+next_row:
+    push y
+    ld y, 16
+    ld [sp + 1], y
+    pop y
+
+    jmp line
+
+done:
+    pop y
+    ret
+
+sprite:
+    .incpng "assets/icon.png"
+end_sprite:
+