mirror of
https://github.com/TorqueGameEngines/Torque3D.git
synced 2026-01-19 20:24:49 +00:00
411 lines
17 KiB
C++
411 lines
17 KiB
C++
//-----------------------------------------------------------------------------
|
|
// Copyright (c) 2012 GarageGames, LLC
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "platform/platform.h"
|
|
#include "lighting/advanced/glsl/gBufferConditionerGLSL.h"
|
|
|
|
#include "shaderGen/featureMgr.h"
|
|
#include "gfx/gfxStringEnumTranslate.h"
|
|
#include "materials/materialFeatureTypes.h"
|
|
#include "materials/materialFeatureData.h"
|
|
#include "shaderGen/GLSL/shaderFeatureGLSL.h"
|
|
|
|
|
|
GBufferConditionerGLSL::GBufferConditionerGLSL( const GFXFormat bufferFormat, const NormalSpace nrmSpace ) :
|
|
Parent( bufferFormat )
|
|
{
|
|
// Figure out how we should store the normal data. These are the defaults.
|
|
mCanWriteNegativeValues = false;
|
|
mNormalStorageType = CartesianXYZ;
|
|
|
|
// Note: We clear to a depth 1 (the w component) so
|
|
// that the unrendered parts of the scene end up
|
|
// farthest to the camera.
|
|
const NormalStorage &twoCmpNrmStorageType = ( nrmSpace == WorldSpace ? Spherical : LambertAzimuthal );
|
|
switch(bufferFormat)
|
|
{
|
|
case GFXFormatR8G8B8A8:
|
|
mNormalStorageType = twoCmpNrmStorageType;
|
|
mBitsPerChannel = 8;
|
|
break;
|
|
|
|
case GFXFormatR16G16B16A16F:
|
|
// Floating point buffers don't need to encode negative values
|
|
mCanWriteNegativeValues = true;
|
|
mNormalStorageType = twoCmpNrmStorageType;
|
|
mBitsPerChannel = 16;
|
|
break;
|
|
|
|
// Store a 32bit depth with a sperical normal in the
|
|
// integer 16 format. This gives us perfect depth
|
|
// precision and high quality normals within a 64bit
|
|
// buffer format.
|
|
case GFXFormatR16G16B16A16:
|
|
mNormalStorageType = twoCmpNrmStorageType;
|
|
mBitsPerChannel = 16;
|
|
break;
|
|
|
|
case GFXFormatR32G32B32A32F:
|
|
mCanWriteNegativeValues = true;
|
|
mNormalStorageType = CartesianXYZ;
|
|
mBitsPerChannel = 32;
|
|
break;
|
|
|
|
default:
|
|
AssertFatal(false, "Unsupported G-Buffer format");
|
|
}
|
|
}
|
|
|
|
GBufferConditionerGLSL::~GBufferConditionerGLSL()
|
|
{
|
|
}
|
|
|
|
void GBufferConditionerGLSL::processVert( Vector<ShaderComponent*> &componentList,
|
|
const MaterialFeatureData &fd )
|
|
{
|
|
// If we have a normal map then that feature will
|
|
// take care of passing gbNormal to the pixel shader.
|
|
if ( fd.features[MFT_NormalMap] )
|
|
return;
|
|
|
|
MultiLine *meta = new MultiLine;
|
|
output = meta;
|
|
|
|
// grab incoming vert normal
|
|
Var *inNormal = (Var*) LangElement::find( "normal" );
|
|
if (!inNormal)
|
|
{
|
|
inNormal = new Var("normal", "vec3");
|
|
meta->addStatement(new GenOp(" @ = vec3( 0.0, 0.0, 1.0 );\r\n", new DecOp(inNormal)));
|
|
Con::errorf("ShagerGen: Something went bad with ShaderGen. The normal should be already defined.");
|
|
}
|
|
AssertFatal( inNormal, "Something went bad with ShaderGen. The normal should be already defined." );
|
|
|
|
// grab output for gbuffer normal
|
|
ShaderConnector *connectComp = dynamic_cast<ShaderConnector *>( componentList[C_CONNECTOR] );
|
|
Var *outNormal = connectComp->getElement( RT_TEXCOORD );
|
|
outNormal->setName( "gbNormal" );
|
|
outNormal->setStructName( "OUT" );
|
|
outNormal->setType( "float3" );
|
|
|
|
if( !fd.features[MFT_ParticleNormal] )
|
|
{
|
|
// Kick out the view-space normal
|
|
|
|
// TODO: Total hack because Conditioner is directly derived
|
|
// from ShaderFeature and not from ShaderFeatureGLSL.
|
|
NamedFeatureGLSL dummy( String::EmptyString );
|
|
dummy.setInstancingFormat( mInstancingFormat );
|
|
Var *worldViewOnly = dummy.getWorldView( componentList, fd.features[MFT_UseInstancing], meta );
|
|
|
|
meta->addStatement( new GenOp(" @ = tMul(@, float4( normalize(@), 0.0 ) ).xyz;\r\n",
|
|
outNormal, worldViewOnly, inNormal ) );
|
|
}
|
|
else
|
|
{
|
|
// Assume the particle normal generator has already put this in view space
|
|
// and normalized it
|
|
meta->addStatement( new GenOp( " @ = @;\r\n", outNormal, inNormal ) );
|
|
}
|
|
}
|
|
|
|
void GBufferConditionerGLSL::processPix( Vector<ShaderComponent*> &componentList,
|
|
const MaterialFeatureData &fd )
|
|
{
|
|
// sanity
|
|
AssertFatal( fd.features[MFT_EyeSpaceDepthOut], "No depth-out feature enabled! Bad news!" );
|
|
|
|
MultiLine *meta = new MultiLine;
|
|
|
|
// grab connector normal
|
|
ShaderConnector *connectComp = dynamic_cast<ShaderConnector *>( componentList[C_CONNECTOR] );
|
|
Var *gbNormal = (Var*) LangElement::find( "gbNormal" );
|
|
if( !gbNormal )
|
|
{
|
|
gbNormal = connectComp->getElement( RT_TEXCOORD );
|
|
gbNormal->setName( "gbNormal" );
|
|
gbNormal->setStructName( "IN" );
|
|
gbNormal->setType( "float3" );
|
|
gbNormal->mapsToSampler = false;
|
|
gbNormal->uniform = false;
|
|
}
|
|
|
|
// find depth
|
|
ShaderFeature *depthFeat = FEATUREMGR->getByType( MFT_EyeSpaceDepthOut );
|
|
AssertFatal( depthFeat != NULL, "No eye space depth feature found!" );
|
|
|
|
Var *depth = (Var*) LangElement::find(depthFeat->getOutputVarName());
|
|
AssertFatal( depth, "Something went bad with ShaderGen. The depth should be already generated by the EyeSpaceDepthOut feature." );
|
|
|
|
|
|
Var *unconditionedOut = new Var;
|
|
unconditionedOut->setType("float4");
|
|
unconditionedOut->setName("normal_depth");
|
|
|
|
LangElement *outputDecl = new DecOp( unconditionedOut );
|
|
|
|
// If we're doing deferred blending then we need
|
|
// to steal away the alpha channel before the
|
|
// conditioner stomps on it.
|
|
Var *alphaVal = NULL;
|
|
if ( fd.features[ MFT_IsTranslucentZWrite ] )
|
|
{
|
|
alphaVal = new Var( "outAlpha", "float" );
|
|
meta->addStatement( new GenOp( " @ = OUT_col1.a; // MFT_IsTranslucentZWrite\r\n", new DecOp( alphaVal ) ) );
|
|
}
|
|
|
|
// If using interlaced normals, invert the normal
|
|
if(fd.features[MFT_InterlacedDeferred])
|
|
{
|
|
// NOTE: Its safe to not call ShaderFeatureGLSL::addOutVpos() in the vertex
|
|
// shader as for SM 3.0 nothing is needed there.
|
|
Var *Vpos = (Var*) LangElement::find( "gl_Position" ); //Var *Vpos = ShaderFeatureGLSL::getInVpos( meta, componentList );
|
|
|
|
Var *iGBNormal = new Var( "interlacedGBNormal", "float3" );
|
|
meta->addStatement(new GenOp(" @ = (frac(@.y * 0.5) < 0.1 ? reflect(@, float3(0.0, -1.0, 0.0)) : @);\r\n", new DecOp(iGBNormal), Vpos, gbNormal, gbNormal));
|
|
gbNormal = iGBNormal;
|
|
}
|
|
|
|
// NOTE: We renormalize the normal here as they
|
|
// will not stay normalized during interpolation.
|
|
meta->addStatement( new GenOp(" @ = @;", outputDecl, new GenOp( "float4(normalize(@), @)", gbNormal, depth ) ) );
|
|
meta->addStatement( assignOutput( unconditionedOut ) );
|
|
|
|
// If we have an alpha var then we're doing deferred lerp blending.
|
|
if ( alphaVal )
|
|
{
|
|
Var *outColor = (Var*)LangElement::find( getOutputTargetVarName( DefaultTarget ) );
|
|
meta->addStatement( new GenOp( " @.ba = float2( 0, @ ); // MFT_IsTranslucentZWrite\r\n", outColor, alphaVal ) );
|
|
}
|
|
|
|
output = meta;
|
|
}
|
|
|
|
ShaderFeature::Resources GBufferConditionerGLSL::getResources( const MaterialFeatureData &fd )
|
|
{
|
|
Resources res;
|
|
|
|
// Passing from VS->PS:
|
|
// - world space normal (gbNormal)
|
|
res.numTexReg = 1;
|
|
|
|
return res;
|
|
}
|
|
|
|
Var* GBufferConditionerGLSL::printMethodHeader( MethodType methodType, const String &methodName, Stream &stream, MultiLine *meta )
|
|
{
|
|
const bool isCondition = ( methodType == ConditionerFeature::ConditionMethod );
|
|
|
|
Var *retVal = NULL;
|
|
|
|
// The uncondition method inputs are changed
|
|
if( isCondition )
|
|
retVal = Parent::printMethodHeader( methodType, methodName, stream, meta );
|
|
else
|
|
{
|
|
Var *methodVar = new Var;
|
|
methodVar->setName(methodName);
|
|
methodVar->setType("float4");
|
|
DecOp *methodDecl = new DecOp(methodVar);
|
|
|
|
Var *deferredSampler = new Var;
|
|
deferredSampler->setName("deferredSamplerVar");
|
|
deferredSampler->setType("sampler2D");
|
|
DecOp *deferredSamplerDecl = new DecOp(deferredSampler);
|
|
|
|
Var *screenUV = new Var;
|
|
screenUV->setName("screenUVVar");
|
|
screenUV->setType("float2");
|
|
DecOp *screenUVDecl = new DecOp(screenUV);
|
|
|
|
Var *bufferSample = new Var;
|
|
bufferSample->setName("bufferSample");
|
|
bufferSample->setType("float4");
|
|
DecOp *bufferSampleDecl = new DecOp(bufferSample);
|
|
|
|
meta->addStatement( new GenOp( "@(@, @)\r\n", methodDecl, deferredSamplerDecl, screenUVDecl ) );
|
|
|
|
meta->addStatement( new GenOp( "{\r\n" ) );
|
|
|
|
meta->addStatement( new GenOp( " // Sampler g-buffer\r\n" ) );
|
|
|
|
#ifdef TORQUE_OS_XENON
|
|
meta->addStatement( new GenOp( " @;\r\n", bufferSampleDecl ) );
|
|
meta->addStatement( new GenOp( " asm { tfetch2D @, @, @, MagFilter = point, MinFilter = point, MipFilter = point };\r\n", bufferSample, screenUV, deferredSampler ) );
|
|
#else
|
|
// The gbuffer has no mipmaps, so use tex2dlod when
|
|
// possible so that the shader compiler can optimize.
|
|
meta->addStatement( new GenOp( " #if TORQUE_SM >= 30\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = tex2Dlod(@, float4(@,0,0));\r\n", bufferSampleDecl, deferredSampler, screenUV ) );
|
|
meta->addStatement( new GenOp( " #else\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = tex2D(@, @);\r\n", bufferSampleDecl, deferredSampler, screenUV ) );
|
|
meta->addStatement( new GenOp( " #endif\r\n\r\n" ) );
|
|
#endif
|
|
|
|
// We don't use this way of passing var's around, so this should cause a crash
|
|
// if something uses this improperly
|
|
retVal = bufferSample;
|
|
}
|
|
|
|
return retVal;
|
|
}
|
|
|
|
GenOp* GBufferConditionerGLSL::_posnegEncode( GenOp *val )
|
|
{
|
|
if(mNormalStorageType == LambertAzimuthal)
|
|
return mCanWriteNegativeValues ? val : new GenOp(avar("(%f * (@ + %f))", 1.0f/(M_SQRT2_F * 2.0f), M_SQRT2_F), val);
|
|
else
|
|
return mCanWriteNegativeValues ? val : new GenOp("(0.5 * (@ + 1.0))", val);
|
|
}
|
|
|
|
GenOp* GBufferConditionerGLSL::_posnegDecode( GenOp *val )
|
|
{
|
|
if(mNormalStorageType == LambertAzimuthal)
|
|
return mCanWriteNegativeValues ? val : new GenOp(avar("(@ * %f - %f)", M_SQRT2_F * 2.0f, M_SQRT2_F), val);
|
|
else
|
|
return mCanWriteNegativeValues ? val : new GenOp("(@ * 2.0 - 1.0)", val);
|
|
}
|
|
|
|
Var* GBufferConditionerGLSL::_conditionOutput( Var *unconditionedOutput, MultiLine *meta )
|
|
{
|
|
Var *retVar = new Var;
|
|
retVar->setType("float4");
|
|
retVar->setName("_gbConditionedOutput");
|
|
LangElement *outputDecl = new DecOp( retVar );
|
|
|
|
switch(mNormalStorageType)
|
|
{
|
|
case CartesianXYZ:
|
|
meta->addStatement( new GenOp( " // g-buffer conditioner: float4(normal.xyz, depth)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, @.a);\r\n", outputDecl,
|
|
_posnegEncode(new GenOp("@.xyz", unconditionedOutput)), unconditionedOutput ) );
|
|
break;
|
|
|
|
case CartesianXY:
|
|
meta->addStatement( new GenOp( " // g-buffer conditioner: float4(normal.xy, depth Hi + z-sign, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, @.a);", outputDecl,
|
|
_posnegEncode(new GenOp("float3(@.xy, sign(@.z))", unconditionedOutput, unconditionedOutput)), unconditionedOutput ) );
|
|
break;
|
|
|
|
case Spherical:
|
|
meta->addStatement( new GenOp( " // g-buffer conditioner: float4(normal.theta, normal.phi, depth Hi, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, 0.0, @.a);\r\n", outputDecl,
|
|
_posnegEncode(new GenOp("float2(atan2(@.y, @.x) / 3.14159265358979323846f, @.z)", unconditionedOutput, unconditionedOutput, unconditionedOutput ) ),
|
|
unconditionedOutput ) );
|
|
|
|
// HACK: This fixes the noise present when using a floating point
|
|
// gbuffer on Geforce cards and the "flat areas unlit" issues.
|
|
//
|
|
// We need work around atan2() above to fix this issue correctly
|
|
// without the extra overhead of this test.
|
|
//
|
|
meta->addStatement( new GenOp( " if ( abs( dot( @.xyz, float3( 0.0, 0.0, 1.0 ) ) ) > 0.999f ) @ = float4( 0, 1 * sign( @.z ), 0, @.a );\r\n",
|
|
unconditionedOutput, retVar, unconditionedOutput, unconditionedOutput ) );
|
|
break;
|
|
|
|
case LambertAzimuthal:
|
|
//http://en.wikipedia.org/wiki/Lambert_azimuthal_equal-area_projection
|
|
//
|
|
// Note we're casting to half to use partial precision
|
|
// sqrt which is much faster on older Geforces while
|
|
// still being acceptable for normals.
|
|
//
|
|
meta->addStatement( new GenOp( " // g-buffer conditioner: float4(normal.X, normal.Y, depth Hi, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, 0.0, @.a);\r\n", outputDecl,
|
|
_posnegEncode(new GenOp("sqrt(half(2.0/(1.0 - @.y))) * half2(@.xz)", unconditionedOutput, unconditionedOutput)),
|
|
unconditionedOutput ) );
|
|
break;
|
|
}
|
|
|
|
// Encode depth into two channels
|
|
if(mNormalStorageType != CartesianXYZ)
|
|
{
|
|
const U64 maxValPerChannel = (U64)1 << mBitsPerChannel;
|
|
meta->addStatement( new GenOp( " \r\n // Encode depth into hi/lo\r\n" ) );
|
|
meta->addStatement( new GenOp( avar( " float2 _tempDepth = frac(@.a * float2(1.0, %llu.0));\r\n", maxValPerChannel - 1 ),
|
|
unconditionedOutput ) );
|
|
meta->addStatement( new GenOp( avar( " @.zw = _tempDepth.xy - _tempDepth.yy * float2(1.0/%llu.0, 0.0);\r\n\r\n", maxValPerChannel - 1 ),
|
|
retVar ) );
|
|
}
|
|
|
|
AssertFatal( retVar != NULL, avar( "Cannot condition output to buffer format: %s", GFXStringTextureFormat[getBufferFormat()] ) );
|
|
return retVar;
|
|
}
|
|
|
|
Var* GBufferConditionerGLSL::_unconditionInput( Var *conditionedInput, MultiLine *meta )
|
|
{
|
|
Var *retVar = new Var;
|
|
retVar->setType("float4");
|
|
retVar->setName("_gbUnconditionedInput");
|
|
LangElement *outputDecl = new DecOp( retVar );
|
|
|
|
switch(mNormalStorageType)
|
|
{
|
|
case CartesianXYZ:
|
|
meta->addStatement( new GenOp( " // g-buffer unconditioner: float4(normal.xyz, depth)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, @.a);\r\n", outputDecl,
|
|
_posnegDecode(new GenOp("@.xyz", conditionedInput)), conditionedInput ) );
|
|
break;
|
|
|
|
case CartesianXY:
|
|
meta->addStatement( new GenOp( " // g-buffer unconditioner: float4(normal.xy, depth Hi + z-sign, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(@, @.a);\r\n", outputDecl,
|
|
_posnegDecode(new GenOp("@.xyz", conditionedInput)), conditionedInput ) );
|
|
meta->addStatement( new GenOp( " @.z *= sqrt(1.0 - dot(@.xy, @.xy));\r\n", retVar, retVar, retVar ) );
|
|
break;
|
|
|
|
case Spherical:
|
|
meta->addStatement( new GenOp( " // g-buffer unconditioner: float4(normal.theta, normal.phi, depth Hi, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " float2 spGPUAngles = @;\r\n", _posnegDecode(new GenOp("@.xy", conditionedInput)) ) );
|
|
meta->addStatement( new GenOp( " float2 sincosTheta;\r\n" ) );
|
|
meta->addStatement( new GenOp( " sincos(spGPUAngles.x * 3.14159265358979323846f, sincosTheta.x, sincosTheta.y);\r\n" ) );
|
|
meta->addStatement( new GenOp( " float2 sincosPhi = float2(sqrt(1.0 - spGPUAngles.y * spGPUAngles.y), spGPUAngles.y);\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4(sincosTheta.y * sincosPhi.x, sincosTheta.x * sincosPhi.x, sincosPhi.y, @.a);\r\n", outputDecl, conditionedInput ) );
|
|
break;
|
|
|
|
case LambertAzimuthal:
|
|
// Note we're casting to half to use partial precision
|
|
// sqrt which is much faster on older Geforces while
|
|
// still being acceptable for normals.
|
|
//
|
|
meta->addStatement( new GenOp( " // g-buffer unconditioner: float4(normal.X, normal.Y, depth Hi, depth Lo)\r\n" ) );
|
|
meta->addStatement( new GenOp( " float2 _inpXY = @;\r\n", _posnegDecode(new GenOp("@.xy", conditionedInput)) ) );
|
|
meta->addStatement( new GenOp( " float _xySQ = dot(_inpXY, _inpXY);\r\n" ) );
|
|
meta->addStatement( new GenOp( " @ = float4( sqrt(half(1.0 - (_xySQ / 4.0))) * _inpXY, -1.0 + (_xySQ / 2.0), @.a).xzyw;\r\n", outputDecl, conditionedInput ) );
|
|
break;
|
|
}
|
|
|
|
// Recover depth from encoding
|
|
if(mNormalStorageType != CartesianXYZ)
|
|
{
|
|
const U64 maxValPerChannel = (U64)1 << mBitsPerChannel;
|
|
meta->addStatement( new GenOp( " \r\n // Decode depth\r\n" ) );
|
|
meta->addStatement( new GenOp( avar( " @.w = dot( @.zw, float2(1.0, 1.0/%llu.0));\r\n", maxValPerChannel - 1 ),
|
|
retVar, conditionedInput ) );
|
|
}
|
|
|
|
|
|
AssertFatal( retVar != NULL, avar( "Cannot uncondition input from buffer format: %s", GFXStringTextureFormat[getBufferFormat()] ) );
|
|
return retVar;
|
|
}
|
|
|