Revert "An option to RLE-compress masked art"

This reverts commit c884f1a354.

Superceded by `DEVILUTIONX_CONVERT_FONTS_TO_CEL`, which offers the same
RAM reduction but without slowdown.

CMake/Definitions.cmake

@@ -15,7 +15,6 @@ foreach(
   GPERF_HEAP_FIRST_GAME_ITERATION
   STREAM_ALL_AUDIO
   PACKET_ENCRYPTION
-  DEVILUTIONX_MASKED_ART_RLE
   DEVILUTIONX_CONVERT_FONTS_TO_CEL
 )
   if(${def_name})

CMakeLists.txt

@@ -59,8 +59,6 @@ mark_as_advanced(DISABLE_STREAMING_SOUNDS)
 option(STREAM_ALL_AUDIO "Stream all the audio. For extremely RAM-constrained platforms.")
 mark_as_advanced(STREAM_ALL_AUDIO)
 
-option(DEVILUTIONX_MASKED_ART_RLE "RLE-compress masked art in memory (e.g. fonts). Slightly lower RAM usage at a significant performance cost." OFF)
-
 option(DEVILUTIONX_CONVERT_FONTS_TO_CEL "Convert PCX font files to CEL in memory.")
 
 if(TSAN)

Source/DiabloUI/art.cpp

@@ -76,21 +76,8 @@ void LoadArt(const char *pszFile, Art *art, int frames, SDL_Color *pPalette, con
 void LoadMaskedArt(const char *pszFile, Art *art, int frames, int mask, const std::array<uint8_t, 256> *colorMapping)
 {
 	LoadArt(pszFile, art, frames, nullptr, colorMapping);
-	if (art->surface == nullptr)
-		return;
-	SDL_Surface *surface = art->surface.get();
-#if SDL_VERSION_ATLEAST(2, 0, 0)
-#ifdef DEVILUTIONX_MASKED_ART_RLE
-	SDL_SetSurfaceRLE(surface, 1);
-#endif
-	SDL_SetColorKey(surface, SDL_TRUE, mask);
-#else
-	int flags = SDL_SRCCOLORKEY;
-#ifdef DEVILUTIONX_MASKED_ART_RLE
-	flags |= SDL_RLEACCEL;
-#endif
-	SDL_SetColorKey(surface, flags, mask);
-#endif
+	if (art->surface != nullptr)
+		SDLC_SetColorKey(art->surface.get(), mask);
 }
 
 void LoadArt(Art *art, const std::uint8_t *artData, int w, int h, int frames)

Source/utils/sdl_compat.h

@@ -35,6 +35,15 @@ inline const Uint8 *SDLC_GetKeyState()
 #endif
 }
 
+inline int SDLC_SetColorKey(SDL_Surface *surface, Uint32 key)
+{
+#ifdef USE_SDL1
+	return SDL_SetColorKey(surface, SDL_SRCCOLORKEY, key);
+#else
+	return SDL_SetColorKey(surface, SDL_TRUE, key);
+#endif
+}
+
 // Copies the colors into the surface's palette.
 inline int SDLC_SetSurfaceColors(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors)
 {