AbstractTexture: Support BGRA8 formats

Used for some driver's swap chains, and EFB to RAM.

Source/Core/VideoBackends/D3D/DXTexture.cpp

@@ -40,7 +40,11 @@ DXGI_FORMAT GetDXGIFormatForHostFormat(AbstractTextureFormat format)
   case AbstractTextureFormat::BPTC:
     return DXGI_FORMAT_BC7_UNORM;
   case AbstractTextureFormat::RGBA8:
+    return DXGI_FORMAT_R8G8B8A8_UNORM;
+  case AbstractTextureFormat::BGRA8:
+    return DXGI_FORMAT_B8G8R8A8_UNORM;
   default:
+    PanicAlert("Unhandled texture format.");
     return DXGI_FORMAT_R8G8B8A8_UNORM;
   }
 }

Source/Core/VideoBackends/OGL/OGLTexture.cpp

@@ -35,7 +35,11 @@ GLenum GetGLInternalFormatForTextureFormat(AbstractTextureFormat format, bool st
   case AbstractTextureFormat::BPTC:
     return GL_COMPRESSED_RGBA_BPTC_UNORM_ARB;
   case AbstractTextureFormat::RGBA8:
+    return storage ? GL_RGBA8 : GL_RGBA;
+  case AbstractTextureFormat::BGRA8:
+    return GL_BGRA;
   default:
+    PanicAlert("Unhandled texture format.");
     return storage ? GL_RGBA8 : GL_RGBA;
   }
 }
@@ -46,6 +50,8 @@ GLenum GetGLFormatForTextureFormat(AbstractTextureFormat format)
   {
   case AbstractTextureFormat::RGBA8:
     return GL_RGBA;
+  case AbstractTextureFormat::BGRA8:
+    return GL_BGRA;
   // Compressed texture formats don't use this parameter.
   default:
     return GL_UNSIGNED_BYTE;
@@ -57,6 +63,7 @@ GLenum GetGLTypeForTextureFormat(AbstractTextureFormat format)
   switch (format)
   {
   case AbstractTextureFormat::RGBA8:
+  case AbstractTextureFormat::BGRA8:
     return GL_UNSIGNED_BYTE;
   // Compressed texture formats don't use this parameter.
   default:

Source/Core/VideoBackends/Vulkan/Util.cpp

@@ -107,7 +107,13 @@ VkFormat GetVkFormatForHostTextureFormat(AbstractTextureFormat format)
     return VK_FORMAT_BC7_UNORM_BLOCK;
 
   case AbstractTextureFormat::RGBA8:
+    return VK_FORMAT_R8G8B8A8_UNORM;
+
+  case AbstractTextureFormat::BGRA8:
+    return VK_FORMAT_B8G8R8A8_UNORM;
+
   default:
+    PanicAlert("Unhandled texture format.");
     return VK_FORMAT_R8G8B8A8_UNORM;
   }
 }

Source/Core/VideoCommon/AbstractTexture.cpp

@@ -5,7 +5,7 @@
 #include <algorithm>
 
 #include "Common/Assert.h"
-
+#include "Common/MsgHandler.h"
 #include "VideoCommon/AbstractTexture.h"
 #include "VideoCommon/ImageWrite.h"
 
@@ -102,8 +102,17 @@ AbstractTexture::MapRegionImpl(u32 level, u32 x, u32 y, u32 width, u32 height)
 
 bool AbstractTexture::IsCompressedHostTextureFormat(AbstractTextureFormat format)
 {
-  // This will need to be changed if we add any other uncompressed formats.
-  return format != AbstractTextureFormat::RGBA8;
+  switch (format)
+  {
+  case AbstractTextureFormat::DXT1:
+  case AbstractTextureFormat::DXT3:
+  case AbstractTextureFormat::DXT5:
+  case AbstractTextureFormat::BPTC:
+    return true;
+
+  default:
+    return false;
+  }
 }
 
 size_t AbstractTexture::CalculateHostTextureLevelPitch(AbstractTextureFormat format, u32 row_length)
@@ -117,8 +126,11 @@ size_t AbstractTexture::CalculateHostTextureLevelPitch(AbstractTextureFormat for
   case AbstractTextureFormat::BPTC:
     return static_cast<size_t>(std::max(1u, row_length / 4)) * 16;
   case AbstractTextureFormat::RGBA8:
-  default:
+  case AbstractTextureFormat::BGRA8:
     return static_cast<size_t>(row_length) * 4;
+  default:
+    PanicAlert("Unhandled texture format.");
+    return 0;
   }
 }
 

Source/Core/VideoCommon/TextureConfig.h

@@ -13,10 +13,12 @@
 enum class AbstractTextureFormat : u32
 {
   RGBA8,
+  BGRA8,
   DXT1,
   DXT3,
   DXT5,
-  BPTC
+  BPTC,
+  Undefined
 };
 
 struct TextureConfig