Add workaround for B5G6R5 format in Intel driver

src/libANGLE/renderer/d3d/WorkaroundsD3D.h

@@ -80,6 +80,11 @@ struct WorkaroundsD3D
     // We can work around this bug by doing an internal blit to a temporary single-channel texture
     // before we sample.
     bool emulateTinyStencilTextures = false;
+
+    // In Intel driver, the data with format DXGI_FORMAT_B5G6R5_UNORM will be parsed incorrectly.
+    // This workaroud will disable B5G6R5 support when it's Intel driver. By default, it will use
+    // R8G8B8A8 format.
+    bool disableB5G6R5Support = false;
 };
 
 }  // namespace rx

src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp

@@ -896,11 +896,19 @@ void Renderer11::populateRenderer11DeviceCaps()
         }
     }
 
-    hr = mDevice->CheckFormatSupport(DXGI_FORMAT_B5G6R5_UNORM, &(mRenderer11DeviceCaps.B5G6R5support));
-    if (FAILED(hr))
+    if (getWorkarounds().disableB5G6R5Support)
     {
         mRenderer11DeviceCaps.B5G6R5support = 0;
     }
+    else
+    {
+        hr = mDevice->CheckFormatSupport(DXGI_FORMAT_B5G6R5_UNORM,
+                                         &(mRenderer11DeviceCaps.B5G6R5support));
+        if (FAILED(hr))
+        {
+            mRenderer11DeviceCaps.B5G6R5support = 0;
+        }
+    }
 
     hr = mDevice->CheckFormatSupport(DXGI_FORMAT_B4G4R4A4_UNORM, &(mRenderer11DeviceCaps.B4G4R4A4support));
     if (FAILED(hr))

src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp

@@ -1541,6 +1541,7 @@ WorkaroundsD3D GenerateWorkarounds(const Renderer11DeviceCaps &deviceCaps,
     workarounds.getDimensionsIgnoresBaseLevel     = (adapterDesc.VendorId == VENDOR_ID_NVIDIA);
 
     workarounds.preAddTexelFetchOffsets = (adapterDesc.VendorId == VENDOR_ID_INTEL);
+    workarounds.disableB5G6R5Support    = (adapterDesc.VendorId == VENDOR_ID_INTEL);
 
     // TODO(jmadill): Disable when we have a fixed driver version.
     workarounds.emulateTinyStencilTextures = (adapterDesc.VendorId == VENDOR_ID_AMD);