Set seamless cubemap filtering in StateManagerGL.

src/libANGLE/renderer/gl/StateManagerGL.cpp

@@ -91,6 +91,7 @@ StateManagerGL::StateManagerGL(const FunctionsGL *functions, const gl::Caps &ren
       mClearColor(0.0f, 0.0f, 0.0f, 0.0f),
       mClearDepth(1.0f),
       mClearStencil(0),
+      mTextureCubemapSeamlessEnabled(false),
       mLocalDirtyBits()
 {
     ASSERT(mFunctions);
@@ -504,6 +505,9 @@ gl::Error StateManagerGL::setGenericDrawState(const gl::Data &data)
     const FramebufferGL *framebufferGL = GetImplAs<FramebufferGL>(framebuffer);
     bindFramebuffer(GL_DRAW_FRAMEBUFFER, framebufferGL->getFramebufferID());
 
+    // Seamless cubemaps are required for ES3 and higher contexts.
+    setTextureCubemapSeamlessEnabled(data.clientVersion >= 3);
+
     return gl::Error(GL_NO_ERROR);
 }
 
@@ -1241,4 +1245,21 @@ void StateManagerGL::syncState(const gl::State &state, const gl::State::DirtyBit
         mLocalDirtyBits.reset();
     }
 }
+
+void StateManagerGL::setTextureCubemapSeamlessEnabled(bool enabled)
+{
+    if (mTextureCubemapSeamlessEnabled != enabled)
+    {
+        mTextureCubemapSeamlessEnabled = enabled;
+        if (mTextureCubemapSeamlessEnabled)
+        {
+            mFunctions->enable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+        }
+        else
+        {
+            mFunctions->disable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+        }
+    }
+}
+
 }

src/libANGLE/renderer/gl/StateManagerGL.h

@@ -126,6 +126,8 @@ class StateManagerGL final : angle::NonCopyable
   private:
     gl::Error setGenericDrawState(const gl::Data &data);
 
+    void setTextureCubemapSeamlessEnabled(bool enabled);
+
     const FunctionsGL *mFunctions;
 
     GLuint mProgram;
@@ -213,6 +215,8 @@ class StateManagerGL final : angle::NonCopyable
     float mClearDepth;
     GLint mClearStencil;
 
+    bool mTextureCubemapSeamlessEnabled;
+
     gl::State::DirtyBits mLocalDirtyBits;
 };