flip_y.patch

diff --git a/src/libANGLE/renderer/metal/ContextMtl.mm b/src/libANGLE/renderer/metal/ContextMtl.mm
index c013093ec0..d04ad9c52c 100644
--- a/src/libANGLE/renderer/metal/ContextMtl.mm
+++ b/src/libANGLE/renderer/metal/ContextMtl.mm
@@ -1505,7 +1505,7 @@ ProgramExecutableImpl *ContextMtl::createProgramExecutable(const gl::ProgramExec
 // Framebuffer creation
 FramebufferImpl *ContextMtl::createFramebuffer(const gl::FramebufferState &state)
 {
-    return new FramebufferMtl(state, this, /* flipY */ false);
+    return new FramebufferMtl(state, this);
 }
 
 // Texture creation
diff --git a/src/libANGLE/renderer/metal/DisplayMtl.mm b/src/libANGLE/renderer/metal/DisplayMtl.mm
index 6d24b3273b..81fedacb55 100644
--- a/src/libANGLE/renderer/metal/DisplayMtl.mm
+++ b/src/libANGLE/renderer/metal/DisplayMtl.mm
@@ -910,6 +910,8 @@ void DisplayMtl::initializeExtensions() const
     // Reset
     mNativeExtensions = gl::Extensions();
 
+    mNativeExtensions.framebufferFlipYMESA = true;
+
     // Enable this for simple buffer readback testing, but some functionality is missing.
     // NOTE(hqle): Support full mapBufferRangeEXT extension.
     mNativeExtensions.mapbufferOES                  = true;
diff --git a/src/libANGLE/renderer/metal/FrameBufferMtl.h b/src/libANGLE/renderer/metal/FrameBufferMtl.h
index 84e5326b72..29d0c3d4d7 100644
--- a/src/libANGLE/renderer/metal/FrameBufferMtl.h
+++ b/src/libANGLE/renderer/metal/FrameBufferMtl.h
@@ -29,7 +29,7 @@ class SurfaceMtl;
 class FramebufferMtl : public FramebufferImpl
 {
   public:
-    explicit FramebufferMtl(const gl::FramebufferState &state, ContextMtl *context, bool flipY);
+    explicit FramebufferMtl(const gl::FramebufferState &state, ContextMtl *context);
     ~FramebufferMtl() override;
     void destroy(const gl::Context *context) override;
 
diff --git a/src/libANGLE/renderer/metal/FrameBufferMtl.mm b/src/libANGLE/renderer/metal/FrameBufferMtl.mm
index f97f7b0af7..bf36c29df7 100644
--- a/src/libANGLE/renderer/metal/FrameBufferMtl.mm
+++ b/src/libANGLE/renderer/metal/FrameBufferMtl.mm
@@ -125,11 +125,11 @@ angle::Result Copy2DTextureSlice0Level0ToTempTexture(const gl::Context *context,
 }  // namespace
 
 // FramebufferMtl implementation
-FramebufferMtl::FramebufferMtl(const gl::FramebufferState &state, ContextMtl *context, bool flipY)
+FramebufferMtl::FramebufferMtl(const gl::FramebufferState &state, ContextMtl *context)
     : FramebufferImpl(state),
       mColorRenderTargets(context->getNativeCaps().maxColorAttachments, nullptr),
       mBackbuffer(nullptr),
-      mFlipY(flipY)
+      mFlipY(state.getFlipY())
 {
     reset();
 }
@@ -707,6 +707,9 @@ angle::Result FramebufferMtl::syncState(const gl::Context *context,
     {
         switch (dirtyBit)
         {
+            case gl::Framebuffer::DIRTY_BIT_FLIP_Y:
+                mFlipY = mState.getFlipY();
+                break;
             case gl::Framebuffer::DIRTY_BIT_DEPTH_ATTACHMENT:
                 ANGLE_TRY(updateDepthRenderTarget(context));
                 break;