Add skeleton architecture for displaying custom splash screen

fusee/fusee-secondary/src/loader.c

@@ -136,6 +136,8 @@ static int loadlist_ini_handler(void *user, const char *section, const char *nam
             /* Read in entrypoint as a hex string. */
             sscanf(value, "%x", &x);
             loader_ctx->chainload_entrypoint = (entrypoint_t)x;
+        } else if (strcmp(name, LOADER_CUSTOMSPLASH_KEY) == 0) {
+            strncpy(loader_ctx->custom_splash_path, value, sizeof(loader_ctx->custom_splash_path));
         } else {
             return 0;
         }

fusee/fusee-secondary/src/loader.h

@@ -18,10 +18,12 @@ typedef struct {
     load_file_t exosphere_loadfile;
     load_file_t tsecfw_loadfile;
     load_file_t warmboot_loadfile;
+    char custom_splash_path[0x300];
 } loader_ctx_t;
 
 #define LOADER_ENTRYPOINT_KEY "entrypoint"
 #define LOADER_LOADLIST_KEY "loadlist"
+#define LOADER_CUSTOMSPLASH_KEY "custom_splash"
 
 #define LOADER_PACKAGE2_KEY "package2"
 #define LOADER_EXOSPHERE_KEY "exosphere"

fusee/fusee-secondary/src/nxboot.c

@@ -1,7 +1,14 @@
 #include "utils.h"
 #include "nxboot.h"
+#include "loader.h"
+#include "splash_screen.h"
 
 /* This is the main function responsible for booting Horizon. */
 void nxboot_main(void) {
+    loader_ctx_t *loader_ctx = get_loader_ctx();
+      
     /* TODO: Implement this function. */
+    
+    /* Display splash screen. */
+    display_splash_screen_bmp(loader_ctx->custom_splash_path);
 }

fusee/fusee-secondary/src/splash_screen.c

@@ -0,0 +1,17 @@
+#include "utils.h"
+#include "splash_screen.h"
+#include "sd_utils.h"
+#include "lib/printk.h"
+#include "display/video_fb.h"
+
+void display_splash_screen_bmp(const char *custom_splash_path) {
+    unsigned char *splash_screen = g_default_splash_screen;
+    if (custom_splash_path != NULL && custom_splash_path[0] != '\x00') {
+        if (!read_sd_file(splash_screen, sizeof(g_default_splash_screen), custom_splash_path)) {
+            printk("Error: Failed to read custom splash screen from %s!\n", custom_splash_path);
+            generic_panic();
+        }
+    }
+    
+    /* TODO: Display the splash screen. It should be a pointer to a BMP, at this point. */
+}

fusee/fusee-secondary/src/splash_screen.h

@@ -0,0 +1,9 @@
+#ifndef FUSEE_SPLASH_SCREEN_H
+#define FUSEE_SPLASH_SCREEN_H
+
+/* TODO: Actually make this a real thing. */
+extern unsigned char g_default_splash_screen[1];
+
+void display_splash_screen_bmp(const char *custom_splash_path);
+
+#endif

fusee/fusee-secondary/src/splash_screen_default.c

@@ -0,0 +1,3 @@
+#include "splash_screen.h"
+
+unsigned char g_default_splash_screen[1] = {0};