--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fade.c	Thu Jul 17 22:03:19 2025 -0400
@@ -0,0 +1,95 @@
+/*
+Copyright (c) 2023 MCL Software
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”),
+to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "common.h"
+
+Uint8 alpha;
+bool fadeInProgress = 0;
+SDL_TimerID fadeTimer = 0;
+
+Uint32 fadeIn(Uint32 interval)
+{
+    alpha -= 1;
+    SDL_SetRenderDrawColor(renderer, 0, 0, 0, alpha);
+
+    if(alpha == 0)
+    {
+        SDL_RemoveTimer(fadeTimer);
+        return 0;
+    }
+
+    return interval;
+}
+
+Uint32 fadeOut(Uint32 interval)
+{
+    alpha += 1;
+    SDL_SetRenderDrawColor(renderer, 0, 0, 0, alpha);
+
+    if(alpha == 255)
+    {
+        SDL_RemoveTimer(fadeTimer);
+        return 0;
+    }
+
+    return interval;
+}
+
+bool ISOL_FadeIn(int interval)
+{
+    if(fadeInProgress && alpha > 0)
+    {
+        SDL_RenderFillRect(renderer, &(SDL_Rect){0, 0, SCREEN_WIDTH, SCREEN_HEIGHT});
+        //SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE);
+        return 0;
+    }
+
+    else if(fadeInProgress)
+    {
+        fadeInProgress = 0;
+        return 1;
+    }
+
+    else
+    {
+        fadeInProgress = 1;
+        alpha = 255;
+        fadeTimer = SDL_AddTimer(interval, fadeIn, 0);
+        return 0;
+    }
+}
+
+bool ISOL_FadeOut(int interval)
+{
+    if(fadeInProgress && alpha < 255)
+    {
+        SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
+        SDL_RenderFillRect(renderer, &(SDL_Rect){0, 0, SCREEN_WIDTH, SCREEN_HEIGHT});
+        return 0;
+    }
+
+    else if(fadeInProgress)
+    {
+        fadeInProgress = 0;
+        return 1;
+    }
+
+    else
+    {
+        fadeInProgress = 1;
+        alpha = 0;
+        fadeTimer = SDL_AddTimer(interval, fadeOut, 0);
+        return 0;
+    }
+}