Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/examples/common/mtlHud.h

@@ -0,0 +1,55 @@
+//
+//   Copyright 2016 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV_EXAMPLES_MTL_HUD_H
+#define OPENSUBDIV_EXAMPLES_MTL_HUD_H
+
+@protocol MTLTexture;
+@protocol MTLBuffer;
+@protocol MTLRenderCommandEncoder;
+@protocol MTLRenderPipelineState;
+@protocol MTLDevice;
+@class MTLRenderPipelineDescriptor;
+@class MTLDepthStencilDescriptor;
+
+#include "hud.h"
+#include "mtlUtils.h"
+
+class MTLhud : public Hud {
+
+public:
+    MTLhud();
+    ~MTLhud();
+
+    virtual void Init(id<MTLDevice> device, MTLRenderPipelineDescriptor* parentPipelineDescriptor, MTLDepthStencilDescriptor* depthStencilStateDescriptor,
+    				  int width, int height, int framebufferWidth, int framebufferHeight);
+
+    virtual void Rebuild(int width, int height,
+                         int framebufferWidth, int framebufferHeight);
+
+    virtual bool Flush(id<MTLRenderCommandEncoder> encoder);
+
+    id<MTLTexture> GetFontTexture() const {
+        return _fontTexture;
+    }
+
+    void FillBackground(id<MTLRenderCommandEncoder> encoder);
+    
+    float UIScale = 1.0f;
+
+private:
+	id<MTLDevice> _device;
+    id<MTLTexture> _fontTexture;
+	OpenSubdiv::OPENSUBDIV_VERSION::Osd::MTLRingBuffer<float, 1> _staticBuffer;
+	OpenSubdiv::OPENSUBDIV_VERSION::Osd::MTLRingBuffer<float, 3> _dynamicBuffer;
+
+    id<MTLRenderPipelineState> _fgPipelineState, _bgPipelineState;
+    id<MTLDepthStencilState> _depthStencilState;
+};
+
+
+#endif //OPENSUBDIV_EXAMPLES_MTL_HUD_H