1 files changed, 9 insertions, 1 deletions

diff --git a/src/ppu.c b/src/ppu.c
index 3afa533..38b27e6 100644
--- a/src/ppu.c
+++ b/src/ppu.c
@@ -27,6 +27,7 @@ static size_t screen_height = 0;
 static size_t bpp = 0;
 static int fb_file = 0;
 static int refresh_file = 0;
+static int zoom = 2;
 
 static u8 *framebuffer = 0;
 
@@ -175,6 +176,8 @@ ppu_init(void) {
         fprintf(stderr, "error: couldn't mmap the framebuffer\n");
         exit(EXIT_FAILURE);
     }
+    screen_width /= zoom;
+    screen_height /= zoom;
 
     // Allocate intermediate buffers.
     pixels_fg = malloc(screen_width * screen_height);
@@ -222,7 +225,12 @@ blit_framebuffer(void) {
                 size_t idx = i + j * screen_width;
                 if (bpp == 16) {
                     u16 *p = framebuffer;
-                    p[idx] = rgb565(palette[pixels_fg[idx] << 2 | pixels_bg[idx]]);
+                    for (size_t zz = 0; zz < zoom; zz++) {
+                        size_t fb_idx = (i * zoom + j * screen_width * zoom * zoom + zz * screen_width * zoom);
+                        for (size_t z = 0; z < zoom; z++) {
+                            p[fb_idx + z] = rgb565(palette[pixels_fg[idx] << 2 | pixels_bg[idx]]);
+                        }
+                    }
                 } else if (bpp == 32) {
                     u32 *p = framebuffer;
                     p[idx] = palette[pixels_fg[idx] << 2 | pixels_bg[idx]];