Okay, alright, skipping blank pixels.

diff --git a/implementations/uvm-ncc/xerblin.c b/implementations/uvm-ncc/xerblin.c
index 89acf81..a5b776a 100644 (file)
--- a/implementations/uvm-ncc/xerblin.c
+++ b/implementations/uvm-ncc/xerblin.c
@@ -19,8 +19,12 @@ draw_char(u8 ch, u64 dest_x, u64 dest_y)
        u32* character_data = font_data[ch];
        for (size_t x = 0; x < font_width; ++x) {
                for (size_t y = 0; y < font_height; ++y) {
-                       u32 pixel = character_data[x + font_width * y];
                        u32* pix_ptr = dest + x + FRAME_WIDTH * y;
+                       u32 dest_pixel = *pix_ptr;
+                       u32 pixel = character_data[x + font_width * y];
+                       if (!(pixel >> 24)) {  // no alpha
+                               continue;
+                       }
                        *pix_ptr = pixel;
                }
        }