Ya funciona el fade de la pantalla de carga

source/jail_engine/paleta.cpp

@@ -61,7 +61,7 @@ void pBlit(int dx, int dy, int sx, int sy, int w, int h)
 {
     if (jSourceSurf == NULL)
         return;
-    
+
     for (int iy = 0; iy < h; ++iy)
     {
         for (int ix = 0; ix < w; ++ix)
@@ -140,7 +140,7 @@ void pFlip(SDL_Renderer *renderer)
     for (int i = 0; i < jWidth * jHeight; ++i)
         pixels[i] = paleta[jScreen->data[i]];
     SDL_UnlockTexture(jTex);
-    SDL_Rect rect = {0,64,256,128};
+    SDL_Rect rect = {0, 64, 256, 128};
     SDL_RenderCopy(renderer, jTex, NULL, &rect);
 }
 
@@ -154,4 +154,23 @@ void pPutPixel(int x, int y, Uint8 color)
 Uint8 pGetPixel(int x, int y)
 {
     return jSourceSurf->data[x + y * jSourceSurf->w];
+}
+
+bool pFadePal()
+{
+    paleta[1] = paleta[0];
+    
+    // Colores pares
+    for (int i = 18; i > 0; i = i - 2)
+    {
+        paleta[i] = paleta[i - 2];
+    }
+
+    // Colores impares
+    for (int i = 17; i > 1; i = i - 2)
+    {
+        paleta[i] = paleta[i - 2];
+    }
+
+    return paleta[15] == paleta[0] ? true : false;
 }