Add function to compute number of pixels in a framebufferHEADmain

1 files changed, 9 insertions, 3 deletions

diff --git a/src/framebuffer.c b/src/framebuffer.c
index dc9cc78..5cb41fd 100644
--- a/src/framebuffer.c
+++ b/src/framebuffer.c
@@ -54,13 +54,19 @@ const Framebuffer* framebuffer_get() {
   return &framebuffer;
 }
 
+static inline uint32_t framebuffer_num_pixels() {
+  const uint32_t num_channels = framebuffer.depth / 8;
+  const uint32_t num_pixels   = framebuffer.size  / num_channels;
+  return num_pixels;
+}
+
 void framebuffer_present(const Pixel* pixels) {
-  memcpy(framebuffer.pixels, pixels, framebuffer.size);
+  const uint32_t num_pixels = framebuffer_num_pixels();
+  memcpy(framebuffer.pixels, pixels, num_pixels);
 }
 
 void framebuffer_clear(Pixel colour) {
-  const uint32_t num_channels = framebuffer.depth / 8;
-  const uint32_t num_pixels   = framebuffer.size  / num_channels;
+  const uint32_t num_pixels = framebuffer_num_pixels();
   volatile Pixel* fb = framebuffer.pixels;
   for (size_t i = 0; i < num_pixels; i++) {
     fb->r = colour.r;