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Deduplicate decal and alpha handling in NifLoader

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master
Alexei Kotov 3 weeks ago
parent 4ccf9c1917
commit 5789eb73b1
1 changed files with 69 additions and 91 deletions
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160
components/nifosg/nifloader.cpp
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@ -2209,36 +2209,79 @@ namespace NifOsg
handleDepthFlags(stateset, material->mDepthTest, material->mDepthWrite);
}
void handleShaderMaterialDrawableProperties(
Bgsm::MaterialFilePtr shaderMat, osg::ref_ptr<osg::Material> mat, osg::Node& node, bool& hasSortAlpha)
void handleDecal(bool hasSortAlpha, osg::ref_ptr<osg::StateSet> stateset)
{
mat->setAlpha(osg::Material::FRONT_AND_BACK, shaderMat->mTransparency);
if (shaderMat->mAlphaTest)
osg::ref_ptr<osg::PolygonOffset> polygonOffset(new osg::PolygonOffset);
polygonOffset->setUnits(SceneUtil::AutoDepth::isReversed() ? 1.f : -1.f);
polygonOffset->setFactor(SceneUtil::AutoDepth::isReversed() ? 0.65f : -0.65f);
polygonOffset = shareAttribute(polygonOffset);
stateset->setAttributeAndModes(polygonOffset, osg::StateAttribute::ON);
if (!mPushedSorter && !hasSortAlpha)
stateset->setRenderBinDetails(1, "SORT_BACK_TO_FRONT");
}
void handleAlphaTesting(
bool enabled, osg::AlphaFunc::ComparisonFunction function, int threshold, osg::Node& node)
{
if (enabled)
{
osg::StateSet* stateset = node.getOrCreateStateSet();
osg::ref_ptr<osg::AlphaFunc> alphaFunc(
new osg::AlphaFunc(osg::AlphaFunc::GREATER, shaderMat->mAlphaTestThreshold / 255.f));
osg::ref_ptr<osg::AlphaFunc> alphaFunc(new osg::AlphaFunc(function, threshold / 255.f));
alphaFunc = shareAttribute(alphaFunc);
stateset->setAttributeAndModes(alphaFunc, osg::StateAttribute::ON);
node.getOrCreateStateSet()->setAttributeAndModes(alphaFunc, osg::StateAttribute::ON);
}
if (shaderMat->mAlphaBlend)
else if (osg::StateSet* stateset = node.getStateSet())
{
osg::StateSet* stateset = node.getOrCreateStateSet();
osg::ref_ptr<osg::BlendFunc> blendFunc(new osg::BlendFunc(
getBlendMode(shaderMat->mSourceBlendMode), getBlendMode(shaderMat->mDestinationBlendMode)));
stateset->removeAttribute(osg::StateAttribute::ALPHAFUNC);
stateset->removeMode(GL_ALPHA_TEST);
}
}
void handleAlphaBlending(
bool enabled, int sourceMode, int destMode, bool sort, bool& hasSortAlpha, osg::Node& node)
{
if (enabled)
{
osg::ref_ptr<osg::StateSet> stateset = node.getOrCreateStateSet();
osg::ref_ptr<osg::BlendFunc> blendFunc(
new osg::BlendFunc(getBlendMode(sourceMode), getBlendMode(destMode)));
// on AMD hardware, alpha still seems to be stored with an RGBA framebuffer with OpenGL.
// This might be mandated by the OpenGL 2.1 specification section 2.14.9, or might be a bug.
// Either way, D3D8.1 doesn't do that, so adapt the destination factor.
if (blendFunc->getDestination() == GL_DST_ALPHA)
blendFunc->setDestination(GL_ONE);
blendFunc = shareAttribute(blendFunc);
stateset->setAttributeAndModes(blendFunc, osg::StateAttribute::ON);
hasSortAlpha = true;
if (sort)
{
hasSortAlpha = true;
if (!mPushedSorter)
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
else if (!mPushedSorter)
{
stateset->setRenderBinToInherit();
}
}
else if (osg::ref_ptr<osg::StateSet> stateset = node.getStateSet())
{
stateset->removeAttribute(osg::StateAttribute::BLENDFUNC);
stateset->removeMode(GL_BLEND);
if (!mPushedSorter)
stateset->setRenderBinToInherit();
}
}
void handleShaderMaterialDrawableProperties(
Bgsm::MaterialFilePtr shaderMat, osg::ref_ptr<osg::Material> mat, osg::Node& node, bool& hasSortAlpha)
{
mat->setAlpha(osg::Material::FRONT_AND_BACK, shaderMat->mTransparency);
handleAlphaTesting(shaderMat->mAlphaTest, osg::AlphaFunc::GREATER, shaderMat->mAlphaTestThreshold, node);
handleAlphaBlending(shaderMat->mAlphaBlend, shaderMat->mSourceBlendMode, shaderMat->mDestinationBlendMode,
true, hasSortAlpha, node);
if (shaderMat->mDecal)
{
osg::StateSet* stateset = node.getOrCreateStateSet();
if (!mPushedSorter && !hasSortAlpha)
stateset->setRenderBinDetails(1, "SORT_BACK_TO_FRONT");
osg::ref_ptr<osg::PolygonOffset> polygonOffset(new osg::PolygonOffset);
polygonOffset->setUnits(SceneUtil::AutoDepth::isReversed() ? 1.f : -1.f);
polygonOffset->setFactor(SceneUtil::AutoDepth::isReversed() ? 0.65f : -0.65f);
stateset->setAttributeAndModes(polygonOffset, osg::StateAttribute::ON);
handleDecal(hasSortAlpha, node.getOrCreateStateSet());
}
if (shaderMat->mShaderType == Bgsm::ShaderType::Lighting)
{
@ -2627,12 +2670,9 @@ namespace NifOsg
bool hasMatCtrl = false;
bool hasSortAlpha = false;
osg::StateSet* blendFuncStateSet = nullptr;
auto setBin_Transparent = [](osg::StateSet* ss) { ss->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); };
auto setBin_BackToFront = [](osg::StateSet* ss) { ss->setRenderBinDetails(0, "SORT_BACK_TO_FRONT"); };
auto setBin_Traversal = [](osg::StateSet* ss) { ss->setRenderBinDetails(2, "TraversalOrderBin"); };
auto setBin_Inherit = [](osg::StateSet* ss) { ss->setRenderBinToInherit(); };
auto lightmode = Nif::NiVertexColorProperty::LightMode::LightMode_EmiAmbDif;
float emissiveMult = 1.f;
@ -2718,52 +2758,10 @@ namespace NifOsg
case Nif::RC_NiAlphaProperty:
{
const Nif::NiAlphaProperty* alphaprop = static_cast<const Nif::NiAlphaProperty*>(property);
if (alphaprop->useAlphaBlending())
{
osg::ref_ptr<osg::BlendFunc> blendFunc(
new osg::BlendFunc(getBlendMode(alphaprop->sourceBlendMode()),
getBlendMode(alphaprop->destinationBlendMode())));
// on AMD hardware, alpha still seems to be stored with an RGBA framebuffer with OpenGL.
// This might be mandated by the OpenGL 2.1 specification section 2.14.9, or might be a bug.
// Either way, D3D8.1 doesn't do that, so adapt the destination factor.
if (blendFunc->getDestination() == GL_DST_ALPHA)
blendFunc->setDestination(GL_ONE);
blendFunc = shareAttribute(blendFunc);
node->getOrCreateStateSet()->setAttributeAndModes(blendFunc, osg::StateAttribute::ON);
if (!alphaprop->noSorter())
{
hasSortAlpha = true;
if (!mPushedSorter)
setBin_Transparent(node->getStateSet());
}
else
{
if (!mPushedSorter)
setBin_Inherit(node->getStateSet());
}
}
else if (osg::StateSet* stateset = node->getStateSet())
{
stateset->removeAttribute(osg::StateAttribute::BLENDFUNC);
stateset->removeMode(GL_BLEND);
blendFuncStateSet = stateset;
if (!mPushedSorter)
blendFuncStateSet->setRenderBinToInherit();
}
if (alphaprop->useAlphaTesting())
{
osg::ref_ptr<osg::AlphaFunc> alphaFunc(new osg::AlphaFunc(
getTestMode(alphaprop->alphaTestMode()), alphaprop->mThreshold / 255.f));
alphaFunc = shareAttribute(alphaFunc);
node->getOrCreateStateSet()->setAttributeAndModes(alphaFunc, osg::StateAttribute::ON);
}
else if (osg::StateSet* stateset = node->getStateSet())
{
stateset->removeAttribute(osg::StateAttribute::ALPHAFUNC);
stateset->removeMode(GL_ALPHA_TEST);
}
handleAlphaBlending(alphaprop->useAlphaBlending(), alphaprop->sourceBlendMode(),
alphaprop->destinationBlendMode(), !alphaprop->noSorter(), hasSortAlpha, *node);
handleAlphaTesting(alphaprop->useAlphaTesting(), getTestMode(alphaprop->alphaTestMode()),
alphaprop->mThreshold, *node);
break;
}
case Nif::RC_BSShaderPPLightingProperty:
@ -2778,8 +2776,6 @@ namespace NifOsg
if (Bgsm::MaterialFilePtr shaderMat = getShaderMaterial(shaderprop->mName))
{
handleShaderMaterialDrawableProperties(shaderMat, mat, *node, hasSortAlpha);
if (shaderMat->mAlphaBlend && !mPushedSorter)
setBin_Transparent(node->getOrCreateStateSet());
if (shaderMat->mShaderType == Bgsm::ShaderType::Lighting)
{
auto bgsm = static_cast<const Bgsm::BGSMFile*>(shaderMat.get());
@ -2799,15 +2795,7 @@ namespace NifOsg
specStrength = shaderprop->mSpecStrength;
specEnabled = shaderprop->specular();
if (shaderprop->decal())
{
osg::StateSet* stateset = node->getOrCreateStateSet();
if (!mPushedSorter && !hasSortAlpha)
stateset->setRenderBinDetails(1, "SORT_BACK_TO_FRONT");
osg::ref_ptr<osg::PolygonOffset> polygonOffset(new osg::PolygonOffset);
polygonOffset->setUnits(SceneUtil::AutoDepth::isReversed() ? 1.f : -1.f);
polygonOffset->setFactor(SceneUtil::AutoDepth::isReversed() ? 0.65f : -0.65f);
stateset->setAttributeAndModes(polygonOffset, osg::StateAttribute::ON);
}
handleDecal(hasSortAlpha, node->getOrCreateStateSet());
break;
}
case Nif::RC_BSEffectShaderProperty:
@ -2816,20 +2804,10 @@ namespace NifOsg
if (Bgsm::MaterialFilePtr shaderMat = getShaderMaterial(shaderprop->mName))
{
handleShaderMaterialDrawableProperties(shaderMat, mat, *node, hasSortAlpha);
if (shaderMat->mAlphaBlend && !mPushedSorter)
setBin_Transparent(node->getOrCreateStateSet());
break;
}
if (shaderprop->decal())
{
osg::StateSet* stateset = node->getOrCreateStateSet();
if (!mPushedSorter && !hasSortAlpha)
stateset->setRenderBinDetails(1, "SORT_BACK_TO_FRONT");
osg::ref_ptr<osg::PolygonOffset> polygonOffset(new osg::PolygonOffset);
polygonOffset->setUnits(SceneUtil::AutoDepth::isReversed() ? 1.f : -1.f);
polygonOffset->setFactor(SceneUtil::AutoDepth::isReversed() ? 0.65f : -0.65f);
stateset->setAttributeAndModes(polygonOffset, osg::StateAttribute::ON);
}
handleDecal(hasSortAlpha, node->getOrCreateStateSet());
if (shaderprop->softEffect())
SceneUtil::setupSoftEffect(
*node, shaderprop->mFalloffDepth, true, shaderprop->mFalloffDepth);

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