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using UnityEngine.Rendering;
using UnityEngine.Rendering.PostProcessing;
namespace UnityEngine.Experimental.Rendering.HDPipeline
{
public class GBufferManager : MRTBufferManager
{
int m_GBufferCount = 0;
bool m_SupportShadowMask = false;
RenderPipelineMaterial m_DeferredMaterial;
protected RenderTargetIdentifier[] m_RTIDsNoShadowMask;
public GBufferManager(RenderPipelineMaterial deferredMaterial, bool enableBakeShadowMask)
: base(deferredMaterial.GetMaterialGBufferCount() + (enableBakeShadowMask ? 1 : 0))
{
Debug.Assert(m_BufferCount <= 8);
m_DeferredMaterial = deferredMaterial;
m_GBufferCount = deferredMaterial.GetMaterialGBufferCount();
m_SupportShadowMask = enableBakeShadowMask;
m_RTIDsNoShadowMask = new RenderTargetIdentifier[m_GBufferCount];
}
public override void CreateBuffers()
{
RenderTextureFormat[] rtFormat;
bool[] sRGBFlags;
m_DeferredMaterial.GetMaterialGBufferDescription(out rtFormat, out sRGBFlags);
for (int gbufferIndex = 0; gbufferIndex < m_GBufferCount; ++gbufferIndex)
{
m_RTs[gbufferIndex] = RTHandle.Alloc(Vector2.one, colorFormat: rtFormat[gbufferIndex], sRGB: sRGBFlags[gbufferIndex], filterMode: FilterMode.Point, name: string.Format("GBuffer{0}", gbufferIndex));
m_RTIDs[gbufferIndex] = m_RTs[gbufferIndex].nameID;
m_TextureShaderIDs[gbufferIndex] = HDShaderIDs._GBufferTexture[gbufferIndex];
m_RTIDsNoShadowMask[gbufferIndex] = HDShaderIDs._GBufferTexture[gbufferIndex];
}
if (m_SupportShadowMask)
{
m_RTs[m_GBufferCount] = RTHandle.Alloc(Vector2.one, colorFormat: Builtin.GetShadowMaskBufferFormat(), sRGB: Builtin.GetShadowMaskSRGBFlag(), filterMode: FilterMode.Point, name: "GBufferShadowMask");
m_RTIDs[m_GBufferCount] = new RenderTargetIdentifier(m_RTs[m_GBufferCount]);
m_TextureShaderIDs[m_GBufferCount] = HDShaderIDs._ShadowMaskTexture;
}
}
public override void BindBufferAsTextures(CommandBuffer cmd)
{
for (int i = 0; i < m_BufferCount; ++i)
{
cmd.SetGlobalTexture(m_TextureShaderIDs[i], m_RTs[i]);
}
// When shadow mask are disabled (i.e we haven't created shadow mask texture, bind a white texture).
if (!m_SupportShadowMask)
{
cmd.SetGlobalTexture(HDShaderIDs._ShadowMaskTexture, RuntimeUtilities.whiteTexture);
}
}
public RenderTargetIdentifier[] GetBuffersRTI(bool enableShadowMask)
{
if(!enableShadowMask)
{
// nameID can change from one frame to another depending on the msaa flag so so we need to update this array to be sure it's up to date.
// Moreover, if we don't have shadow masks we only need to bind the first GBuffers
// This is important because in the shader the shadowmask buffer gets optimized out so anything bound after (like the DBuffer HTile) has a different bind point.
for (int i = 0; i < m_GBufferCount; ++i)
{
m_RTIDsNoShadowMask[i] = m_RTs[i].nameID;
}
return m_RTIDsNoShadowMask;
}
else
{
return GetBuffersRTI();
}
}
public int GetBufferCount(bool enableShadowMask)
{
return enableShadowMask ? m_BufferCount : m_GBufferCount;
}
}
}