Improve usage of static_casts over reinterpret_casts

Static_casts are prefered over reinterpret_casts for better type
safety

Change-Id: I190cbee293591ebf8ab8035e900c081848eb1f30
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6921
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/common/Math.h

@@ -34,12 +34,12 @@ uint32_t Align(uint32_t value, size_t alignment);
 
 template <typename T>
 T* AlignPtr(T* ptr, size_t alignment) {
-    return reinterpret_cast<T*>(AlignVoidPtr(ptr, alignment));
+    return static_cast<T*>(AlignVoidPtr(ptr, alignment));
 }
 
 template <typename T>
 const T* AlignPtr(const T* ptr, size_t alignment) {
-    return reinterpret_cast<const T*>(AlignVoidPtr(const_cast<T*>(ptr), alignment));
+    return static_cast<const T*>(AlignVoidPtr(const_cast<T*>(ptr), alignment));
 }
 
 template <typename destType, typename sourceType>

src/common/SwapChainUtils.h

@@ -22,18 +22,18 @@ DawnSwapChainImplementation CreateSwapChainImplementation(T* swapChain) {
     DawnSwapChainImplementation impl = {};
     impl.userData = swapChain;
     impl.Init = [](void* userData, void* wsiContext) {
-        auto* ctx = reinterpret_cast<typename T::WSIContext*>(wsiContext);
+        auto* ctx = static_cast<typename T::WSIContext*>(wsiContext);
         reinterpret_cast<T*>(userData)->Init(ctx);
     };
     impl.Destroy = [](void* userData) { delete reinterpret_cast<T*>(userData); };
     impl.Configure = [](void* userData, DawnTextureFormat format, DawnTextureUsageBit allowedUsage,
                         uint32_t width, uint32_t height) {
-        return reinterpret_cast<T*>(userData)->Configure(format, allowedUsage, width, height);
+        return static_cast<T*>(userData)->Configure(format, allowedUsage, width, height);
     };
     impl.GetNextTexture = [](void* userData, DawnSwapChainNextTexture* nextTexture) {
-        return reinterpret_cast<T*>(userData)->GetNextTexture(nextTexture);
+        return static_cast<T*>(userData)->GetNextTexture(nextTexture);
     };
-    impl.Present = [](void* userData) { return reinterpret_cast<T*>(userData)->Present(); };
+    impl.Present = [](void* userData) { return static_cast<T*>(userData)->Present(); };
     return impl;
 }
 

src/dawn_native/BindGroup.cpp

@@ -210,7 +210,7 @@ namespace dawn_native {
         ASSERT(mLayout->GetBindingInfo().mask[binding]);
         ASSERT(mLayout->GetBindingInfo().types[binding] == dawn::BindingType::UniformBuffer ||
                mLayout->GetBindingInfo().types[binding] == dawn::BindingType::StorageBuffer);
-        BufferBase* buffer = reinterpret_cast<BufferBase*>(mBindings[binding].Get());
+        BufferBase* buffer = static_cast<BufferBase*>(mBindings[binding].Get());
         return {buffer, mOffsets[binding], mSizes[binding]};
     }
 
@@ -219,7 +219,7 @@ namespace dawn_native {
         ASSERT(binding < kMaxBindingsPerGroup);
         ASSERT(mLayout->GetBindingInfo().mask[binding]);
         ASSERT(mLayout->GetBindingInfo().types[binding] == dawn::BindingType::Sampler);
-        return reinterpret_cast<SamplerBase*>(mBindings[binding].Get());
+        return static_cast<SamplerBase*>(mBindings[binding].Get());
     }
 
     TextureViewBase* BindGroupBase::GetBindingAsTextureView(size_t binding) {
@@ -227,7 +227,7 @@ namespace dawn_native {
         ASSERT(binding < kMaxBindingsPerGroup);
         ASSERT(mLayout->GetBindingInfo().mask[binding]);
         ASSERT(mLayout->GetBindingInfo().types[binding] == dawn::BindingType::SampledTexture);
-        return reinterpret_cast<TextureViewBase*>(mBindings[binding].Get());
+        return static_cast<TextureViewBase*>(mBindings[binding].Get());
     }
 
 }  // namespace dawn_native

src/dawn_native/CommandAllocator.cpp

@@ -237,7 +237,7 @@ namespace dawn_native {
         mLastAllocationSize =
             std::max(minimumSize, std::min(mLastAllocationSize * 2, size_t(16384)));
 
-        uint8_t* block = reinterpret_cast<uint8_t*>(malloc(mLastAllocationSize));
+        uint8_t* block = static_cast<uint8_t*>(malloc(mLastAllocationSize));
         if (DAWN_UNLIKELY(block == nullptr)) {
             return false;
         }

src/dawn_native/CommandAllocator.h

@@ -76,11 +76,11 @@ namespace dawn_native {
         }
         template <typename T>
         T* NextCommand() {
-            return reinterpret_cast<T*>(NextCommand(sizeof(T), alignof(T)));
+            return static_cast<T*>(NextCommand(sizeof(T), alignof(T)));
         }
         template <typename T>
         T* NextData(size_t count) {
-            return reinterpret_cast<T*>(NextData(sizeof(T) * count, alignof(T)));
+            return static_cast<T*>(NextData(sizeof(T) * count, alignof(T)));
         }
 
         // Needs to be called if iteration was stopped early.

src/dawn_native/RenderPassEncoder.h

@@ -55,8 +55,7 @@ namespace dawn_native {
                               T* const* buffers,
                               uint64_t const* offsets) {
             static_assert(std::is_base_of<BufferBase, T>::value, "");
-            SetVertexBuffers(startSlot, count, reinterpret_cast<BufferBase* const*>(buffers),
-                             offsets);
+            SetVertexBuffers(startSlot, count, buffers, offsets);
         }
         void SetVertexBuffers(uint32_t startSlot,
                               uint32_t count,

src/dawn_native/d3d12/SwapChainD3D12.cpp

@@ -44,7 +44,7 @@ namespace dawn_native { namespace d3d12 {
             return nullptr;
         }
 
-        ID3D12Resource* nativeTexture = reinterpret_cast<ID3D12Resource*>(next.texture.ptr);
+        ID3D12Resource* nativeTexture = static_cast<ID3D12Resource*>(next.texture.ptr);
         return new Texture(ToBackend(GetDevice()), descriptor, nativeTexture);
     }
 

src/dawn_native/opengl/BackendGL.cpp

@@ -67,7 +67,7 @@ namespace dawn_native { namespace opengl {
 
         ASSERT(optionsBase->backendType == BackendType::OpenGL);
         const AdapterDiscoveryOptions* options =
-            reinterpret_cast<const AdapterDiscoveryOptions*>(optionsBase);
+            static_cast<const AdapterDiscoveryOptions*>(optionsBase);
 
         if (options->getProc == nullptr) {
             return DAWN_VALIDATION_ERROR("AdapterDiscoveryOptions::getProc must be set");

src/dawn_native/opengl/ShaderModuleGL.cpp

@@ -132,7 +132,7 @@ namespace dawn_native { namespace opengl {
     }
 
     const char* ShaderModule::GetSource() const {
-        return reinterpret_cast<const char*>(mGlslSource.data());
+        return mGlslSource.c_str();
     }
 
     const ShaderModule::CombinedSamplerInfo& ShaderModule::GetCombinedSamplerInfo() const {

src/dawn_native/vulkan/MemoryAllocator.cpp

@@ -121,7 +121,7 @@ namespace dawn_native { namespace vulkan {
 
         allocation->mMemory = allocatedMemory;
         allocation->mOffset = 0;
-        allocation->mMappedPointer = reinterpret_cast<uint8_t*>(mappedPointer);
+        allocation->mMappedPointer = static_cast<uint8_t*>(mappedPointer);
 
         return true;
     }

src/dawn_wire/server/ServerBuffer.cpp

@@ -114,7 +114,7 @@ namespace dawn_wire { namespace server {
         cmd.requestSerial = data->requestSerial;
         cmd.status = status;
         cmd.dataLength = 0;
-        cmd.data = reinterpret_cast<const uint8_t*>(ptr);
+        cmd.data = static_cast<const uint8_t*>(ptr);
 
         if (status == DAWN_BUFFER_MAP_ASYNC_STATUS_SUCCESS) {
             cmd.dataLength = dataLength;

src/tests/DawnTest.cpp

@@ -545,7 +545,7 @@ void DawnTest::ResolveExpectations() {
 
         // Get a pointer to the mapped copy of the data for the expectation.
         const char* data =
-            reinterpret_cast<const char*>(mReadbackSlots[expectation.readbackSlot].mappedData);
+            static_cast<const char*>(mReadbackSlots[expectation.readbackSlot].mappedData);
         data += expectation.readbackOffset;
 
         uint32_t size;
@@ -652,7 +652,7 @@ namespace detail {
     testing::AssertionResult ExpectEq<T>::Check(const void* data, size_t size) {
         DAWN_ASSERT(size == sizeof(T) * mExpected.size());
 
-        const T* actual = reinterpret_cast<const T*>(data);
+        const T* actual = static_cast<const T*>(data);
 
         testing::AssertionResult failure = testing::AssertionFailure();
         for (size_t i = 0; i < mExpected.size(); ++i) {