#include "RenderAPI.h"
#include "PlatformBase.h"

// Direct3D 11 implementation of RenderAPI.

#if SUPPORT_D3D11

#include <assert.h>
#include <d3d11.h>
#include "Unity/IUnityGraphicsD3D11.h"


class RenderAPI_D3D11 : public RenderAPI
{
public:
	RenderAPI_D3D11();
	virtual ~RenderAPI_D3D11() { }

	virtual void processDeviceEvent(UnityGfxDeviceEventType type, IUnityInterfaces* interfaces);

	virtual bool getUsesReverseZ() { return (int)m_Device->GetFeatureLevel() >= (int)D3D_FEATURE_LEVEL_10_0; }
	virtual void initSupportFeature() override;

private:
	ID3D11Device* m_Device;
};


RenderAPI* CreateRenderAPI_D3D11()
{
	return new RenderAPI_D3D11();
}


// Simple compiled shader bytecode.
//
// Shader source that was used:
#if 0
cbuffer MyCB : register(b0)
{
	float4x4 worldMatrix;
}
void VS(float3 pos : POSITION, float4 color : COLOR, out float4 ocolor : COLOR, out float4 opos : SV_Position)
{
	opos = mul(worldMatrix, float4(pos, 1));
	ocolor = color;
}
float4 PS(float4 color : COLOR) : SV_TARGET
{
	return color;
}
#endif // #if 0
//
// Which then was compiled with:
// fxc /Tvs_4_0_level_9_3 /EVS source.hlsl /Fh outVS.h /Qstrip_reflect /Qstrip_debug /Qstrip_priv
// fxc /Tps_4_0_level_9_3 /EPS source.hlsl /Fh outPS.h /Qstrip_reflect /Qstrip_debug /Qstrip_priv
// and results pasted & formatted to take less lines here


RenderAPI_D3D11::RenderAPI_D3D11()
	: m_Device(NULL)
{
}


void RenderAPI_D3D11::processDeviceEvent(UnityGfxDeviceEventType type, IUnityInterfaces* interfaces)
{
	switch (type)
	{
	case kUnityGfxDeviceEventInitialize:
	{
		IUnityGraphicsD3D11* d3d = interfaces->Get<IUnityGraphicsD3D11>();
		m_Device = d3d->GetDevice();
		break;
	}
	case kUnityGfxDeviceEventShutdown:
		break;
	}
}

void RenderAPI_D3D11::initSupportFeature()
{
}


#endif // #if SUPPORT_D3D11