Add initial base implementation for WebGPU rendering backend

Source/Engine/GraphicsDevice/WebGPU/GPUShaderWebGPU.cpp

@@ -0,0 +1,62 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+#if GRAPHICS_API_WEBGPU
+
+#include "GPUShaderWebGPU.h"
+#include "GPUShaderProgramWebGPU.h"
+#include "GPUVertexLayoutWebGPU.h"
+#include "Engine/Serialization/MemoryReadStream.h"
+
+GPUConstantBufferWebGPU::GPUConstantBufferWebGPU(GPUDeviceWebGPU* device, uint32 size, WGPUBuffer buffer, const StringView& name) noexcept
+    : GPUResourceWebGPU(device, name)
+{
+    _size = _memoryUsage = size;
+    Buffer = buffer;
+}
+
+GPUConstantBufferWebGPU::~GPUConstantBufferWebGPU()
+{
+    if (Buffer)
+        wgpuBufferRelease(Buffer);
+}
+
+void GPUConstantBufferWebGPU::OnReleaseGPU()
+{
+    if (Buffer)
+    {
+        wgpuBufferRelease(Buffer);
+        Buffer = nullptr;
+    }
+}
+
+GPUShaderProgram* GPUShaderWebGPU::CreateGPUShaderProgram(ShaderStage type, const GPUShaderProgramInitializer& initializer, Span<byte> bytecode, MemoryReadStream& stream)
+{
+    GPUShaderProgram* shader = nullptr;
+    switch (type)
+    {
+    case ShaderStage::Vertex:
+    {
+        GPUVertexLayout* inputLayout, *vertexLayout;
+        ReadVertexLayout(stream, inputLayout, vertexLayout);
+        MISSING_CODE("create vertex shader");
+        shader = New<GPUShaderProgramVSWebGPU>(initializer, inputLayout, vertexLayout, bytecode);
+        break;
+    }
+    case ShaderStage::Pixel:
+    {
+        MISSING_CODE("create pixel shader");
+        shader = New<GPUShaderProgramPSWebGPU>(initializer);
+        break;
+    }
+    }
+    return shader;
+}
+
+void GPUShaderWebGPU::OnReleaseGPU()
+{
+    _cbs.Clear();
+
+    GPUShader::OnReleaseGPU();
+}
+
+#endif