Refactor alpha blitters, move the SSE41/AVX2 versions into SDL_blit_A.c

VisualC-WinRT/SDL-UWP.vcxproj

@@ -178,8 +178,6 @@
     <ClInclude Include="..\src\video\dummy\SDL_nullvideo.h" />
     <ClInclude Include="..\src\video\SDL_blit.h" />
     <ClInclude Include="..\src\video\SDL_blit_auto.h" />
-    <ClInclude Include="..\src\video\SDL_blit_A_avx2.h" />
-    <ClInclude Include="..\src\video\SDL_blit_A_sse4_1.h" />
     <ClInclude Include="..\src\video\SDL_blit_copy.h" />
     <ClInclude Include="..\src\video\SDL_blit_slow.h" />
     <ClInclude Include="..\src\video\SDL_clipboard_c.h" />
@@ -549,8 +547,6 @@
     <ClCompile Include="..\src\video\SDL_blit_1.c" />
     <ClCompile Include="..\src\video\SDL_blit_A.c" />
     <ClCompile Include="..\src\video\SDL_blit_auto.c" />
-    <ClCompile Include="..\src\video\SDL_blit_A_avx2.c" />
-    <ClCompile Include="..\src\video\SDL_blit_A_sse4_1.c" />
     <ClCompile Include="..\src\video\SDL_blit_copy.c" />
     <ClCompile Include="..\src\video\SDL_blit_N.c" />
     <ClCompile Include="..\src\video\SDL_blit_slow.c" />

VisualC-WinRT/SDL-UWP.vcxproj.filters

@@ -952,12 +952,6 @@
       <Filter>Header Files</Filter>
     </ClInclude>
     <ClInclude Include="..\src\video\SDL_clipboard_c.h" />
-    <ClInclude Include="..\src\video\SDL_blit_A_avx2.h">
-      <Filter>Source Files</Filter>
-    </ClInclude>
-    <ClInclude Include="..\src\video\SDL_blit_A_sse4_1.h">
-      <Filter>Source Files</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\src\joystick\windows\SDL_windows_gaming_input.c">
@@ -978,11 +972,5 @@
     <ClCompile Include="..\src\core\windows\pch_cpp.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\src\video\SDL_blit_A_avx2.c">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="..\src\video\SDL_blit_A_sse4_1.c">
-      <Filter>Source Files</Filter>
-    </ClCompile>
   </ItemGroup>
 </Project>