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// Example low level rendering Unity plugin
#include "PlatformBase.h"
#include "Unity/IUnityGraphics.h"
#include "RenderAPI.h"
#include "SamplePlugin.h"
#if PLATFORM_WIN32 || PLATFORM_UNIVERSAL_WINDOWS
#include <crtdbg.h>
#endif
#include <vector>
using namespace Diligent;
static IUnityInterfaces* s_UnityInterfaces = nullptr;
static IUnityGraphics* s_Graphics = nullptr;
static std::unique_ptr<RenderAPI> s_CurrentAPI;
static UnityGfxRenderer s_DeviceType = kUnityGfxRendererNull;
static std::unique_ptr<SamplePlugin> g_SamplePlugin;
static float4x4 g_Matrix;
extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API SetMatrixFromUnity
(float m00, float m01, float m02, float m03,
float m10, float m11, float m12, float m13,
float m20, float m21, float m22, float m23,
float m30, float m31, float m32, float m33)
{
g_Matrix = float4x4(
m00, m01, m02, m03,
m10, m11, m12, m13,
m20, m21, m22, m23,
m30, m31, m32, m33);
}
static void* g_RenderTargetHandle = nullptr;
static void* g_DepthBufferHandle = nullptr;
extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API SetTexturesFromUnity(void* renderTargetHandle, void *depthBufferHandle)
{
if (s_CurrentAPI)
{
if (g_RenderTargetHandle != renderTargetHandle ||
g_DepthBufferHandle != depthBufferHandle)
{
g_RenderTargetHandle = renderTargetHandle;
g_DepthBufferHandle = depthBufferHandle;
g_SamplePlugin.reset();
s_CurrentAPI->AttachToNativeRenderTexture(g_RenderTargetHandle, g_DepthBufferHandle);
}
}
}
// --------------------------------------------------------------------------
// UnitySetInterfaces
static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType eventType);
extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API UnityPluginLoad(IUnityInterfaces* unityInterfaces)
{
#if (PLATFORM_WIN32 || PLATFORM_UNIVERSAL_WINDOWS) && (defined(_DEBUG) || defined(DEBUG))
_CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif
s_UnityInterfaces = unityInterfaces;
s_Graphics = s_UnityInterfaces->Get<IUnityGraphics>();
s_Graphics->RegisterDeviceEventCallback(OnGraphicsDeviceEvent);
// Run OnGraphicsDeviceEvent(initialize) manually on plugin load
OnGraphicsDeviceEvent(kUnityGfxDeviceEventInitialize);
}
extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API UnityPluginUnload()
{
s_Graphics->UnregisterDeviceEventCallback(OnGraphicsDeviceEvent);
s_Graphics = nullptr;
s_UnityInterfaces = nullptr;
}
#if UNITY_WEBGL
typedef void (UNITY_INTERFACE_API * PluginLoadFunc)(IUnityInterfaces* unityInterfaces);
typedef void (UNITY_INTERFACE_API * PluginUnloadFunc)();
extern "C" void UnityRegisterRenderingPlugin(PluginLoadFunc loadPlugin, PluginUnloadFunc unloadPlugin);
extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API RegisterPlugin()
{
UnityRegisterRenderingPlugin(UnityPluginLoad, UnityPluginUnload);
}
#endif
// --------------------------------------------------------------------------
// GraphicsDeviceEvent
void CreateRenderAPI(UnityGfxRenderer apiType)
{
# if SUPPORT_D3D11
if (apiType == kUnityGfxRendererD3D11)
{
extern RenderAPI* CreateRenderAPI_D3D11();
s_CurrentAPI.reset( CreateRenderAPI_D3D11() );
}
# endif // if SUPPORT_D3D11
# if SUPPORT_D3D9
if (apiType == kUnityGfxRendererD3D9)
{
UNSUPPORTED("D3D9 is not supported")
}
# endif // if SUPPORT_D3D9
# if SUPPORT_D3D12
if (apiType == kUnityGfxRendererD3D12)
{
extern RenderAPI* CreateRenderAPI_D3D12();
s_CurrentAPI.reset( CreateRenderAPI_D3D12() );
}
# endif // if SUPPORT_D3D12
# if SUPPORT_OPENGL_UNIFIED
if (apiType == kUnityGfxRendererOpenGLCore || apiType == kUnityGfxRendererOpenGLES30)
{
extern RenderAPI* CreateRenderAPI_OpenGLCoreES(UnityGfxRenderer apiType);
s_CurrentAPI.reset( CreateRenderAPI_OpenGLCoreES(apiType) );
}
# endif // if SUPPORT_OPENGL_UNIFIED
# if SUPPORT_OPENGL_LEGACY
if (apiType == kUnityGfxRendererOpenGL)
{
UNSUPPORTED("Legacy Opengl is not supported");
}
# endif // if SUPPORT_OPENGL_LEGACY
# if SUPPORT_METAL
if (apiType == kUnityGfxRendererMetal)
{
UNSUPPORTED("Metal is not supported");
}
# endif // if SUPPORT_METAL
}
static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType eventType)
{
// Create graphics API implementation upon initialization
if (eventType == kUnityGfxDeviceEventInitialize)
{
VERIFY_EXPR(!s_CurrentAPI);
s_DeviceType = s_Graphics->GetRenderer();
CreateRenderAPI(s_DeviceType);
if (s_CurrentAPI)
{
s_CurrentAPI->ProcessDeviceEvent(eventType, s_UnityInterfaces);
}
}
else if (eventType == kUnityGfxDeviceEventShutdown)
{
// Cleanup graphics API implementation upon shutdown
// We must destroy all resources before releasing the API
g_SamplePlugin.reset();
if (s_CurrentAPI)
{
s_CurrentAPI->ProcessDeviceEvent(eventType, s_UnityInterfaces);
s_CurrentAPI.reset();
}
s_DeviceType = kUnityGfxRendererNull;
g_RenderTargetHandle = nullptr;
g_DepthBufferHandle = nullptr;
}
else if (s_CurrentAPI)
{
// Let the implementation process the device related events
s_CurrentAPI->ProcessDeviceEvent(eventType, s_UnityInterfaces);
}
}
// --------------------------------------------------------------------------
// OnRenderEvent
// This will be called for GL.IssuePluginEvent script calls; eventID will
// be the integer passed to IssuePluginEvent. In this example, we just ignore
// that value.
static void UNITY_INTERFACE_API OnRenderEvent(int eventID)
{
// Unknown / unsupported graphics device type? Do nothing
if (s_CurrentAPI == nullptr || g_RenderTargetHandle == nullptr || g_DepthBufferHandle == nullptr)
return;
s_CurrentAPI->BeginRendering();
if (!g_SamplePlugin)
{
auto RTFormat = s_CurrentAPI->GetRenderTargetFormat();
auto DepthFormat = s_CurrentAPI->GetDepthBufferFormat();
g_SamplePlugin.reset(new SamplePlugin(s_CurrentAPI->GetDevice(), s_CurrentAPI->GetUsesReverseZ(), RTFormat, DepthFormat));
}
g_SamplePlugin->Render(s_CurrentAPI->GetDeviceContext(), g_Matrix );
s_CurrentAPI->EndRendering();
}
// --------------------------------------------------------------------------
// GetRenderEventFunc, an example function we export which is used to get a rendering event callback function.
extern "C" UnityRenderingEvent UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API GetRenderEventFunc()
{
return OnRenderEvent;
}
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