Vulkan: Fix dirty element array buffer updates.

CONTRIBUTORS

@@ -25,6 +25,7 @@ Google Inc.
  Eric Boren
  Henry Bridge
  Nat Duca
+ Courtney Goeltzenleuchter
  Peter Kasting
  Vangelis Kokkevis
  Zhenyao Mo

src/libANGLE/renderer/vulkan/ContextVk.cpp

@@ -481,10 +481,12 @@ angle::Result ContextVk::setupIndexedDraw(const gl::Context *context,
                                           const void *indices,
                                           vk::CommandBuffer **commandBufferOut)
 {
+    ASSERT(mode != gl::PrimitiveMode::LineLoop);
+
     if (indexType != mCurrentDrawElementsType)
     {
-        mDirtyBits.set(DIRTY_BIT_INDEX_BUFFER);
         mCurrentDrawElementsType = indexType;
+        setIndexBufferDirty();
     }
 
     const gl::Buffer *elementArrayBuffer = mVertexArray->getState().getElementArrayBuffer();
@@ -524,7 +526,7 @@ angle::Result ContextVk::setupLineLoopDraw(const gl::Context *context,
 {
     ANGLE_TRY(mVertexArray->handleLineLoop(this, firstVertex, vertexOrIndexCount,
                                            indexTypeOrInvalid, indices, numIndicesOut));
-    mDirtyBits.set(DIRTY_BIT_INDEX_BUFFER);
+    setIndexBufferDirty();
     mCurrentDrawElementsType = indexTypeOrInvalid != gl::DrawElementsType::InvalidEnum
                                    ? indexTypeOrInvalid
                                    : gl::DrawElementsType::UnsignedInt;

src/libANGLE/renderer/vulkan/ContextVk.h

@@ -232,7 +232,11 @@ class ContextVk : public ContextImpl, public vk::Context, public vk::CommandBuff
                      unsigned int line) override;
     const gl::ActiveTextureArray<TextureVk *> &getActiveTextures() const;
 
-    void setIndexBufferDirty() { mDirtyBits.set(DIRTY_BIT_INDEX_BUFFER); }
+    void setIndexBufferDirty()
+    {
+        mDirtyBits.set(DIRTY_BIT_INDEX_BUFFER);
+        mLastIndexBufferOffset = reinterpret_cast<const void *>(angle::DirtyPointer);
+    }
 
     angle::Result flushImpl(const gl::Semaphore *semaphore);
     angle::Result finishImpl();

src/libANGLE/renderer/vulkan/VertexArrayVk.cpp

@@ -345,7 +345,6 @@ angle::Result VertexArrayVk::syncState(const gl::Context *context,
                     mCurrentElementArrayBuffer = nullptr;
                 }
 
-                mCurrentElementArrayBufferOffset = 0;
                 mLineLoopBufferFirstIndex.reset();
                 mLineLoopBufferLastIndex.reset();
                 contextVk->setIndexBufferDirty();
@@ -356,6 +355,7 @@ angle::Result VertexArrayVk::syncState(const gl::Context *context,
             case gl::VertexArray::DIRTY_BIT_ELEMENT_ARRAY_BUFFER_DATA:
                 mLineLoopBufferFirstIndex.reset();
                 mLineLoopBufferLastIndex.reset();
+                contextVk->setIndexBufferDirty();
                 mDirtyLineLoopTranslation = true;
                 break;