Decompile 2 functions in Source/Render/AlphaRectangle.cpp, Source/Client/ModeFade.cpp, ...

Batch #1027 by ragnarok-clanker: 0 byte-identical, 2 confirmed by peer review.

- fn_01952 DrawAlphaRectangle: logic confirmed by peer review
- fn_17842 ModeFade::Draw: logic confirmed by peer review

Reviewed-by: ragnarok-clanker
Adds to the build: Source/Render/AlphaRectangle.cpp, Source/Client/ModeFade.cpp

Source/Client/ModeFade.cpp

@@ -0,0 +1,26 @@
+#include "Client/ModeFade.h"
+#include "Contents/Sound/SoundMgr.h"
+#include "Render/Primitives/AlphaRectangle.h"
+
+#include <timeapi.h>
+
+// GLOBAL: gl_24680
+std::uint32_t g_modeFadeTick = 0;
+
+// OFFSET: 0x00AD6740
+// FUNCTION: fn_17842
+void ModeFade::Draw() {
+  if (this->requested != 0) {
+    g_modeFadeTick = timeGetTime();
+    g_soundMgr->FadeIn();
+    this->requested = 0;
+  }
+
+  const std::uint32_t elapsed = timeGetTime() - g_modeFadeTick;
+  if (elapsed < 255) {
+    DrawAlphaRectangle(
+      this->primitives, this->textures, this->queues, 0, 0, this->screenWidth, this->screenHeight, (255 - elapsed) << 24, this->depthAlpha, this->depthStart,
+      this->depthEnd
+    );
+  }
+}

Source/Client/ModeFade.h

@@ -0,0 +1,26 @@
+#ifndef RAGNAROK_SOURCE_CLIENT_MODEFADE_H
+#define RAGNAROK_SOURCE_CLIENT_MODEFADE_H
+
+#include <cstdint>
+
+class RenderPrimitivePool;
+class TextureCache;
+struct RenderQueues;
+
+extern std::uint32_t g_modeFadeTick;
+
+struct ModeFade {
+  int& requested;
+  RenderPrimitivePool& primitives;
+  TextureCache& textures;
+  RenderQueues& queues;
+  const int& screenWidth;
+  const int& screenHeight;
+  const bool& depthAlpha;
+  const float& depthStart;
+  const float& depthEnd;
+
+  void Draw();
+};
+
+#endif