// When doing a prepass, we don't need to write the depth anymore.
// Moreover, we need to use DepthEqual because for alpha tested materials we don't do the clip in the shader anymore (otherwise HiZ does not work on PS4)
// Guidelines: In deferred by default there is no opaque in forward. However it is possible to force an opaque material to render in forward
// by using the pass "ForwardOnly". In this case the .shader should not have "Forward" but only a "ForwardOnly" pass.
// It must also have a "DepthForwardOnly" and no "DepthOnly" pass as forward material (either deferred or forward only rendering) have always a depth pass.
// In case of forward only rendering we have a depth prepass. In case of deferred renderer, it is optional
if(forcePrepass||(addFullDepthPrepass&&!addAlphaTestedOnly))// Always true in case of forward rendering, use in case of deferred rendering if requesting a full depth prepass
if(addFullDepthPrepass)// Always true in case of forward rendering, use in case of deferred rendering if requesting a full depth prepass
{
// We render first the opaque object as opaque alpha tested are more costly to render and could be reject by early-z (but not Hi-z as it is disable with clip instruction)
// This is handled automatically with the RenderQueue value (OpaqueAlphaTested have a different value and thus are sorted after Opaque)
// We always do a DepthForwardOnly pass with all the opaque (including alpha test)
// This pass is the same as GBuffer only it does not do alpha test (the clip instruction is removed)
// This is due to the fact that on GCN, any shader with a clip instruction cannot benefit from HiZ so when we do a prepass, in order to get the most performance, we need to make a special case in the subsequent GBuffer pass.
Pass
{
Name "GBufferWithPrepass" // Name is not used
Tags { "LightMode" = "GBufferWithPrepass" } // This will be only for opaque object based on the RenderQueue index
Cull [_CullMode]
Stencil
{
WriteMask [_StencilWriteMask]
Ref [_StencilRef]
Comp Always
Pass Replace
}
HLSLPROGRAM
#pragma multi_compile _ DEBUG_DISPLAY
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ SHADOWS_SHADOWMASK
#ifdef _ALPHATEST_ON
// When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
// This pass is the same as GBuffer only it does not do alpha test (the clip instruction is removed)
// This is due to the fact that on GCN, any shader with a clip instruction cannot benefit from HiZ so when we do a prepass, in order to get the most performance, we need to make a special case in the subsequent GBuffer pass.
Pass
{
Name "GBufferWithPrepass" // Name is not used
Tags { "LightMode" = "GBufferWithPrepass" } // This will be only for opaque object based on the RenderQueue index
Cull [_CullMode]
Stencil
{
WriteMask [_StencilWriteMask]
Ref [_StencilRef]
Comp Always
Pass Replace
}
HLSLPROGRAM
#pragma hull Hull
#pragma domain Domain
#pragma multi_compile _ DEBUG_DISPLAY
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ SHADOWS_SHADOWMASK
#ifdef _ALPHATEST_ON
// When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
[HideInInspector] _CullModeForward("__cullmodeForward", Float) = 2.0 // This mode is dedicated to Forward to correctly handle backface then front face rendering thin transparent
[HideInInspector] _ZTestDepthEqualForOpaque("_ZTestDepthEqualForOpaque", Int) = 4 // Less equal
// This pass is the same as GBuffer only it does not do alpha test (the clip instruction is removed)
// This is due to the fact that on GCN, any shader with a clip instruction cannot benefit from HiZ so when we do a prepass, in order to get the most performance, we need to make a special case in the subsequent GBuffer pass.
Pass
{
Name "GBufferWithPrepass" // Name is not used
Tags { "LightMode" = "GBufferWithPrepass" } // This will be only for opaque object based on the RenderQueue index
Cull [_CullMode]
Stencil
{
WriteMask [_StencilWriteMask]
Ref [_StencilRef]
Comp Always
Pass Replace
}
HLSLPROGRAM
#pragma multi_compile _ DEBUG_DISPLAY
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ SHADOWS_SHADOWMASK
#ifdef _ALPHATEST_ON
// When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
#define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST
#endif
#define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST // This define allow to not perform the alpha test (alpha test is done during depth prepass)
[HideInInspector] _CullModeForward("__cullmodeForward", Float) = 2.0 // This mode is dedicated to Forward to correctly handle backface then front face rendering thin transparent
[HideInInspector] _ZTestDepthEqualForOpaque("_ZTestDepthEqualForOpaque", Int) = 4 // Less equal
// This pass is the same as GBuffer only it does not do alpha test (the clip instruction is removed)
// This is due to the fact that on GCN, any shader with a clip instruction cannot benefit from HiZ so when we do a prepass, in order to get the most performance, we need to make a special case in the subsequent GBuffer pass.
Pass
{
Name "GBufferWithPrepass" // Name is not used
Tags { "LightMode" = "GBufferWithPrepass" } // This will be only for opaque object based on the RenderQueue index
Cull [_CullMode]
Stencil
{
WriteMask [_StencilWriteMask]
Ref [_StencilRef]
Comp Always
Pass Replace
}
HLSLPROGRAM
#pragma hull Hull
#pragma domain Domain
#pragma multi_compile _ DEBUG_DISPLAY
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ SHADOWS_SHADOWMASK
#ifdef _ALPHATEST_ON
// When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
#define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST
#endif
#define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST // This define allow to not perform the alpha test (alpha test is done during depth prepass)
publicboolenableForwardRenderingOnly=false;// TODO: Currently there is no way to strip the extra forward shaders generated by the shaders compiler, so we can switch dynamically.
GitHub
7 年前