A bit faster

1 files changed, 3 insertions, 3 deletions

diff --git a/src/vga.c b/src/vga.c
index f2934a4..a408f71 100644
--- a/src/vga.c
+++ b/src/vga.c
@@ -46,7 +46,7 @@ void set_palette(const uint8_t *palette)
 
 void blit(const uint8_t *src, uint16_t x, uint16_t y, uint16_t w, uint16_t h)
 {
-    for (int16_t j = y; j < y + h; j++)
+    for (int32_t j = y * 320; j < (y + h) * 320; j += 320)
         for (int16_t i = x; i < x + w; i++)
         {
             uint8_t b = *src++;
@@ -56,10 +56,10 @@ void blit(const uint8_t *src, uint16_t x, uint16_t y, uint16_t w, uint16_t h)
                 continue;
 
             /* clipping */
-            if (i < 0 || i >= 320 || j < 0 || j >= 200)
+            if (i < 0 || i >= 320 || j < 0 || j >= 200 * 320)
                 continue;
 
-            buffer[i + j * 320] = b;
+            buffer[i + j] = b;
         }
 }