initial work to split into dart_filament and flutter_filament

flutter_filament/windows/flutter_angle_texture.h

@@ -0,0 +1,80 @@
+#pragma once
+
+#ifndef _FLUTTER_ANGLE_TEXTURE_H 
+#define _FLUTTER_ANGLE_TEXTURE_H
+
+#include <mutex>
+
+#include <flutter/texture_registrar.h>
+#include <flutter/method_channel.h>
+#include <flutter/plugin_registrar_windows.h>
+
+#include <d3d.h>
+#include <d3d11.h>
+
+#include "EGL/egl.h"
+#include "EGL/eglext.h"
+#include "EGL/eglplatform.h"
+#include "GLES2/gl2.h"
+#include "GLES2/gl2ext.h"
+#include <GLES3/gl31.h>
+
+#include <Windows.h>
+#include <wrl.h>
+
+#include "flutter_texture_buffer.h"
+
+typedef uint32_t GLuint;
+
+namespace flutter_filament {
+
+class FlutterAngleTexture : public FlutterTextureBuffer {
+  public:
+    FlutterAngleTexture(
+        flutter::PluginRegistrarWindows* pluginRegistrar,
+        flutter::TextureRegistrar* textureRegistrar,
+        std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result,
+        uint32_t width,
+        uint32_t height,
+        ID3D11Device* D3D11Device,
+        ID3D11DeviceContext* D3D11DeviceContext,
+        EGLConfig eglConfig,
+        EGLDisplay eglDisplay,
+        EGLContext eglContext,
+        std::function<void(size_t, size_t)> onResizeRequested
+    );    
+    ~FlutterAngleTexture();
+
+    void RenderCallback();
+    
+    GLuint glTextureId = 0;
+    std::unique_ptr<flutter::TextureVariant> texture;
+      
+  private:
+    flutter::PluginRegistrarWindows* _pluginRegistrar;
+    flutter::TextureRegistrar* _textureRegistrar;
+    uint32_t _width = 0;
+    uint32_t _height = 0;
+    bool logged = false;
+    std::function<void(size_t, size_t)> _onResizeRequested;
+
+    // Device
+    ID3D11Device* _D3D11Device = nullptr;
+    ID3D11DeviceContext* _D3D11DeviceContext = nullptr;
+    // Texture objects/shared handles
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> _externalD3DTexture2D;
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> _internalD3DTexture2D;
+    HANDLE _externalD3DTextureHandle = nullptr;
+    HANDLE _internalD3DTextureHandle = nullptr;
+
+    EGLDisplay _eglDisplay = EGL_NO_DISPLAY;
+    EGLContext _eglContext = EGL_NO_CONTEXT;
+    EGLConfig _eglConfig = EGL_NO_CONFIG_KHR;
+    EGLSurface _eglSurface = EGL_NO_SURFACE;
+    
+    std::unique_ptr<FlutterDesktopGpuSurfaceDescriptor> _textureDescriptor = nullptr;
+
+};
+
+}
+#endif // _FLUTTER_ANGLE_TEXTURE