1 files changed, 40 insertions, 0 deletions
diff --git a/chromium/third_party/dawn/src/dawn_native/opengl/BackendGL.cpp b/chromium/third_party/dawn/src/dawn_native/opengl/BackendGL.cpp
index c1689132c7d..65d086a8455 100644
--- a/chromium/third_party/dawn/src/dawn_native/opengl/BackendGL.cpp
+++ b/chromium/third_party/dawn/src/dawn_native/opengl/BackendGL.cpp
@@ -161,6 +161,7 @@ namespace dawn_native { namespace opengl {
             mFunctions.Enable(GL_SCISSOR_TEST);
             mFunctions.Enable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
             mFunctions.Enable(GL_MULTISAMPLE);
+            mFunctions.Enable(GL_FRAMEBUFFER_SRGB);
 
             mPCIInfo.name = reinterpret_cast<const char*>(mFunctions.GetString(GL_RENDERER));
 
@@ -168,6 +169,8 @@ namespace dawn_native { namespace opengl {
             const char* vendor = reinterpret_cast<const char*>(mFunctions.GetString(GL_VENDOR));
             mPCIInfo.vendorId = GetVendorIdFromVendors(vendor);
 
+            InitializeSupportedExtensions();
+
             return {};
         }
 
@@ -181,6 +184,43 @@ namespace dawn_native { namespace opengl {
             // all share the same backing OpenGL context.
             return {new Device(this, descriptor, mFunctions)};
         }
+
+        void InitializeSupportedExtensions() {
+            // TextureCompressionBC
+            {
+                // BC1, BC2 and BC3 are not supported in OpenGL or OpenGL ES core features.
+                bool supportsS3TC =
+                    mFunctions.IsGLExtensionSupported("GL_EXT_texture_compression_s3tc");
+
+                // COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT and
+                // COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT requires both GL_EXT_texture_sRGB and
+                // GL_EXT_texture_compression_s3tc on desktop OpenGL drivers.
+                // (https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_sRGB.txt)
+                bool supportsTextureSRGB = mFunctions.IsGLExtensionSupported("GL_EXT_texture_sRGB");
+
+                // GL_EXT_texture_compression_s3tc_srgb is an extension in OpenGL ES.
+                bool supportsS3TCSRGB =
+                    mFunctions.IsGLExtensionSupported("GL_EXT_texture_compression_s3tc_srgb");
+
+                // BC4 and BC5
+                bool supportsRGTC =
+                    mFunctions.IsAtLeastGL(3, 0) ||
+                    mFunctions.IsGLExtensionSupported("GL_ARB_texture_compression_rgtc") ||
+                    mFunctions.IsGLExtensionSupported("GL_EXT_texture_compression_rgtc");
+
+                // BC6 and BC7
+                bool supportsBPTC =
+                    mFunctions.IsAtLeastGL(4, 2) ||
+                    mFunctions.IsGLExtensionSupported("GL_ARB_texture_compression_bptc") ||
+                    mFunctions.IsGLExtensionSupported("GL_EXT_texture_compression_bptc");
+
+                if (supportsS3TC && (supportsTextureSRGB || supportsS3TCSRGB) && supportsRGTC &&
+                    supportsBPTC) {
+                    mSupportedExtensions.EnableExtension(
+                        dawn_native::Extension::TextureCompressionBC);
+                }
+            }
+        }
     };
 
     // Implementation of the OpenGL backend's BackendConnection