1 files changed, 17 insertions, 7 deletions

diff --git a/src/ppu.c b/src/ppu.c
index 99574d7..2e0404f 100644
--- a/src/ppu.c
+++ b/src/ppu.c
@@ -2,8 +2,14 @@
 
 static u32 *framebuffer = 0;
 
+#define SCREEN_WIDTH  800
+#define SCREEN_HEIGHT 600
+
+static u32 palette[4];
+
 void
 ppu_init(void) {
+    // Initialize the framebuffer.
     static MboxFramebufferRequest fb_request = {
         .buf_size = 96,
         .code = MBOX_REQUEST,
@@ -12,16 +18,16 @@ ppu_init(void) {
                 .id = 0x48003,
                 .buf_size = 8,
             },
-            .width = 1024,
-            .height = 1024,
+            .width = SCREEN_WIDTH,
+            .height = SCREEN_HEIGHT,
         },
         .virtual_screen_tag = {
             .header = {
                 .id = 0x48004,
                 .buf_size = 8,
             },
-            .width = 1024,
-            .height = 1024,
+            .width = SCREEN_WIDTH,
+            .height = SCREEN_HEIGHT,
         },
         .depth_tag = {
             .header = {
@@ -45,10 +51,14 @@ ppu_init(void) {
             && fb_request.framebuffer_tag.fb_addr != 0) {
         fb_request.framebuffer_tag.fb_addr &= 0x3FFFFFFF;
         framebuffer = (u32*)((uintptr_t)fb_request.framebuffer_tag.fb_addr);
-        for (size_t i = 0; i < 1024 * 100; i++) {
-            framebuffer[i] = 0xffaa22; // 0xBBGGRR
-        }
     } else {
         uart_puts("Unable initialize framebuffer\n");
+        return;
     }
+
+    // Initialize default palette.
+    palette[0] = 0x00444444;
+    palette[1] = 0x00ffffff;
+    palette[2] = 0x007777ff;
+    palette[3] = 0x00ff7777;
 }