mirror of
https://github.com/TES3MP/openmw-tes3mp.git
synced 2025-01-15 15:49:56 +00:00
12044a607b
Previously we always discarded shadow map fragments if the alpha channel of the output would have been low, but there were some (modded) assets that have non-one alpha but have testing or blending disabled so end up opaque anyway. This lets the shadows of those objects match.
487 lines
20 KiB
C++
487 lines
20 KiB
C++
#include "shadervisitor.hpp"
|
|
|
|
#include <osg/AlphaFunc>
|
|
#include <osg/BlendFunc>
|
|
#include <osg/Geometry>
|
|
#include <osg/Material>
|
|
#include <osg/Texture>
|
|
|
|
#include <osgUtil/TangentSpaceGenerator>
|
|
|
|
#include <components/debug/debuglog.hpp>
|
|
#include <components/misc/stringops.hpp>
|
|
#include <components/resource/imagemanager.hpp>
|
|
#include <components/vfs/manager.hpp>
|
|
#include <components/sceneutil/riggeometry.hpp>
|
|
#include <components/sceneutil/morphgeometry.hpp>
|
|
#include <components/settings/settings.hpp>
|
|
|
|
#include "shadermanager.hpp"
|
|
|
|
namespace Shader
|
|
{
|
|
|
|
ShaderVisitor::ShaderRequirements::ShaderRequirements()
|
|
: mShaderRequired(false)
|
|
, mColorMode(0)
|
|
, mMaterialOverridden(false)
|
|
, mAlphaFuncOverridden(false)
|
|
, mBlendFuncOverridden(false)
|
|
, mNormalHeight(false)
|
|
, mTexStageRequiringTangents(-1)
|
|
, mNode(nullptr)
|
|
{
|
|
}
|
|
|
|
ShaderVisitor::ShaderRequirements::~ShaderRequirements()
|
|
{
|
|
|
|
}
|
|
|
|
ShaderVisitor::ShaderVisitor(ShaderManager& shaderManager, Resource::ImageManager& imageManager, const std::string &defaultVsTemplate, const std::string &defaultFsTemplate)
|
|
: osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
|
|
, mForceShaders(false)
|
|
, mAllowedToModifyStateSets(true)
|
|
, mAutoUseNormalMaps(false)
|
|
, mAutoUseSpecularMaps(false)
|
|
, mShaderManager(shaderManager)
|
|
, mImageManager(imageManager)
|
|
, mDefaultVsTemplate(defaultVsTemplate)
|
|
, mDefaultFsTemplate(defaultFsTemplate)
|
|
{
|
|
mRequirements.push_back(ShaderRequirements());
|
|
}
|
|
|
|
void ShaderVisitor::setForceShaders(bool force)
|
|
{
|
|
mForceShaders = force;
|
|
}
|
|
|
|
void ShaderVisitor::apply(osg::Node& node)
|
|
{
|
|
if (node.getStateSet())
|
|
{
|
|
pushRequirements(node);
|
|
applyStateSet(node.getStateSet(), node);
|
|
traverse(node);
|
|
popRequirements();
|
|
}
|
|
else
|
|
traverse(node);
|
|
}
|
|
|
|
osg::StateSet* getWritableStateSet(osg::Node& node)
|
|
{
|
|
if (!node.getStateSet())
|
|
return node.getOrCreateStateSet();
|
|
|
|
osg::ref_ptr<osg::StateSet> newStateSet = new osg::StateSet(*node.getStateSet(), osg::CopyOp::SHALLOW_COPY);
|
|
node.setStateSet(newStateSet);
|
|
return newStateSet.get();
|
|
}
|
|
|
|
const char* defaultTextures[] = { "diffuseMap", "normalMap", "emissiveMap", "darkMap", "detailMap", "envMap", "specularMap", "decalMap", "bumpMap" };
|
|
bool isTextureNameRecognized(const std::string& name)
|
|
{
|
|
for (unsigned int i=0; i<sizeof(defaultTextures)/sizeof(defaultTextures[0]); ++i)
|
|
if (name == defaultTextures[i])
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void ShaderVisitor::applyStateSet(osg::ref_ptr<osg::StateSet> stateset, osg::Node& node)
|
|
{
|
|
osg::StateSet* writableStateSet = nullptr;
|
|
if (mAllowedToModifyStateSets)
|
|
writableStateSet = node.getStateSet();
|
|
const osg::StateSet::TextureAttributeList& texAttributes = stateset->getTextureAttributeList();
|
|
if (!texAttributes.empty())
|
|
{
|
|
const osg::Texture* diffuseMap = nullptr;
|
|
const osg::Texture* normalMap = nullptr;
|
|
const osg::Texture* specularMap = nullptr;
|
|
const osg::Texture* bumpMap = nullptr;
|
|
for(unsigned int unit=0;unit<texAttributes.size();++unit)
|
|
{
|
|
const osg::StateAttribute *attr = stateset->getTextureAttribute(unit, osg::StateAttribute::TEXTURE);
|
|
if (attr)
|
|
{
|
|
const osg::Texture* texture = attr->asTexture();
|
|
if (texture)
|
|
{
|
|
std::string texName = texture->getName();
|
|
if ((texName.empty() || !isTextureNameRecognized(texName)) && unit == 0)
|
|
texName = "diffuseMap";
|
|
|
|
if (texName == "normalHeightMap")
|
|
{
|
|
mRequirements.back().mNormalHeight = true;
|
|
texName = "normalMap";
|
|
}
|
|
|
|
if (!texName.empty())
|
|
{
|
|
mRequirements.back().mTextures[unit] = texName;
|
|
if (texName == "normalMap")
|
|
{
|
|
mRequirements.back().mTexStageRequiringTangents = unit;
|
|
mRequirements.back().mShaderRequired = true;
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
// normal maps are by default off since the FFP can't render them, now that we'll use shaders switch to On
|
|
writableStateSet->setTextureMode(unit, GL_TEXTURE_2D, osg::StateAttribute::ON);
|
|
normalMap = texture;
|
|
}
|
|
else if (texName == "diffuseMap")
|
|
diffuseMap = texture;
|
|
else if (texName == "specularMap")
|
|
specularMap = texture;
|
|
else if (texName == "bumpMap")
|
|
{
|
|
bumpMap = texture;
|
|
mRequirements.back().mShaderRequired = true;
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
// Bump maps are off by default as well
|
|
writableStateSet->setTextureMode(unit, GL_TEXTURE_2D, osg::StateAttribute::ON);
|
|
}
|
|
else if (texName == "envMap")
|
|
{
|
|
static const bool preLightEnv = Settings::Manager::getBool("apply lighting to environment maps", "Shaders");
|
|
if (preLightEnv)
|
|
mRequirements.back().mShaderRequired = true;
|
|
}
|
|
}
|
|
else
|
|
Log(Debug::Error) << "ShaderVisitor encountered unknown texture " << texture;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mAutoUseNormalMaps && diffuseMap != nullptr && normalMap == nullptr && diffuseMap->getImage(0))
|
|
{
|
|
std::string normalMapFileName = diffuseMap->getImage(0)->getFileName();
|
|
|
|
osg::ref_ptr<osg::Image> image;
|
|
bool normalHeight = false;
|
|
std::string normalHeightMap = normalMapFileName;
|
|
Misc::StringUtils::replaceLast(normalHeightMap, ".", mNormalHeightMapPattern + ".");
|
|
if (mImageManager.getVFS()->exists(normalHeightMap))
|
|
{
|
|
image = mImageManager.getImage(normalHeightMap);
|
|
normalHeight = true;
|
|
}
|
|
else
|
|
{
|
|
Misc::StringUtils::replaceLast(normalMapFileName, ".", mNormalMapPattern + ".");
|
|
if (mImageManager.getVFS()->exists(normalMapFileName))
|
|
{
|
|
image = mImageManager.getImage(normalMapFileName);
|
|
}
|
|
}
|
|
// Avoid using the auto-detected normal map if it's already being used as a bump map.
|
|
// It's probably not an actual normal map.
|
|
bool hasNamesakeBumpMap = image && bumpMap && bumpMap->getImage(0) && image->getFileName() == bumpMap->getImage(0)->getFileName();
|
|
|
|
if (!hasNamesakeBumpMap && image)
|
|
{
|
|
osg::ref_ptr<osg::Texture2D> normalMapTex (new osg::Texture2D(image));
|
|
normalMapTex->setTextureSize(image->s(), image->t());
|
|
normalMapTex->setWrap(osg::Texture::WRAP_S, diffuseMap->getWrap(osg::Texture::WRAP_S));
|
|
normalMapTex->setWrap(osg::Texture::WRAP_T, diffuseMap->getWrap(osg::Texture::WRAP_T));
|
|
normalMapTex->setFilter(osg::Texture::MIN_FILTER, diffuseMap->getFilter(osg::Texture::MIN_FILTER));
|
|
normalMapTex->setFilter(osg::Texture::MAG_FILTER, diffuseMap->getFilter(osg::Texture::MAG_FILTER));
|
|
normalMapTex->setMaxAnisotropy(diffuseMap->getMaxAnisotropy());
|
|
normalMapTex->setName("normalMap");
|
|
|
|
int unit = texAttributes.size();
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
writableStateSet->setTextureAttributeAndModes(unit, normalMapTex, osg::StateAttribute::ON);
|
|
mRequirements.back().mTextures[unit] = "normalMap";
|
|
mRequirements.back().mTexStageRequiringTangents = unit;
|
|
mRequirements.back().mShaderRequired = true;
|
|
mRequirements.back().mNormalHeight = normalHeight;
|
|
}
|
|
}
|
|
if (mAutoUseSpecularMaps && diffuseMap != nullptr && specularMap == nullptr && diffuseMap->getImage(0))
|
|
{
|
|
std::string specularMapFileName = diffuseMap->getImage(0)->getFileName();
|
|
Misc::StringUtils::replaceLast(specularMapFileName, ".", mSpecularMapPattern + ".");
|
|
if (mImageManager.getVFS()->exists(specularMapFileName))
|
|
{
|
|
osg::ref_ptr<osg::Image> image (mImageManager.getImage(specularMapFileName));
|
|
osg::ref_ptr<osg::Texture2D> specularMapTex (new osg::Texture2D(image));
|
|
specularMapTex->setTextureSize(image->s(), image->t());
|
|
specularMapTex->setWrap(osg::Texture::WRAP_S, diffuseMap->getWrap(osg::Texture::WRAP_S));
|
|
specularMapTex->setWrap(osg::Texture::WRAP_T, diffuseMap->getWrap(osg::Texture::WRAP_T));
|
|
specularMapTex->setFilter(osg::Texture::MIN_FILTER, diffuseMap->getFilter(osg::Texture::MIN_FILTER));
|
|
specularMapTex->setFilter(osg::Texture::MAG_FILTER, diffuseMap->getFilter(osg::Texture::MAG_FILTER));
|
|
specularMapTex->setMaxAnisotropy(diffuseMap->getMaxAnisotropy());
|
|
specularMapTex->setName("specularMap");
|
|
|
|
int unit = texAttributes.size();
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
writableStateSet->setTextureAttributeAndModes(unit, specularMapTex, osg::StateAttribute::ON);
|
|
mRequirements.back().mTextures[unit] = "specularMap";
|
|
mRequirements.back().mShaderRequired = true;
|
|
}
|
|
}
|
|
|
|
if (diffuseMap)
|
|
{
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
// We probably shouldn't construct a new version of this each time as StateSets only use pointer comparison by default.
|
|
// Also it should probably belong to the shader manager
|
|
writableStateSet->addUniform(new osg::Uniform("useDiffuseMapForShadowAlpha", true));
|
|
}
|
|
}
|
|
|
|
bool alphaSettingsChanged = false;
|
|
bool alphaTestShadows = false;
|
|
|
|
const osg::StateSet::AttributeList& attributes = stateset->getAttributeList();
|
|
for (osg::StateSet::AttributeList::const_iterator it = attributes.begin(); it != attributes.end(); ++it)
|
|
{
|
|
if (it->first.first == osg::StateAttribute::MATERIAL)
|
|
{
|
|
// This should probably be moved out of ShaderRequirements and be applied directly now it's a uniform instead of a define
|
|
if (!mRequirements.back().mMaterialOverridden || it->second.second & osg::StateAttribute::PROTECTED)
|
|
{
|
|
if (it->second.second & osg::StateAttribute::OVERRIDE)
|
|
mRequirements.back().mMaterialOverridden = true;
|
|
|
|
const osg::Material* mat = static_cast<const osg::Material*>(it->second.first.get());
|
|
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
|
|
int colorMode;
|
|
switch (mat->getColorMode())
|
|
{
|
|
case osg::Material::OFF:
|
|
colorMode = 0;
|
|
break;
|
|
case GL_AMBIENT:
|
|
colorMode = 3;
|
|
break;
|
|
default:
|
|
case GL_AMBIENT_AND_DIFFUSE:
|
|
colorMode = 2;
|
|
break;
|
|
case GL_EMISSION:
|
|
colorMode = 1;
|
|
break;
|
|
}
|
|
|
|
mRequirements.back().mColorMode = colorMode;
|
|
}
|
|
}
|
|
else if (it->first.first == osg::StateAttribute::ALPHAFUNC)
|
|
{
|
|
if (!mRequirements.back().mAlphaFuncOverridden || it->second.second & osg::StateAttribute::PROTECTED)
|
|
{
|
|
if (it->second.second & osg::StateAttribute::OVERRIDE)
|
|
mRequirements.back().mAlphaFuncOverridden = true;
|
|
|
|
const osg::AlphaFunc* test = static_cast<const osg::AlphaFunc*>(it->second.first.get());
|
|
if (test->getFunction() == osg::AlphaFunc::GREATER || test->getFunction() == osg::AlphaFunc::GEQUAL)
|
|
alphaTestShadows = true;
|
|
alphaSettingsChanged = true;
|
|
}
|
|
}
|
|
else if (it->first.first == osg::StateAttribute::BLENDFUNC)
|
|
{
|
|
if (!mRequirements.back().mBlendFuncOverridden || it->second.second & osg::StateAttribute::PROTECTED)
|
|
{
|
|
if (it->second.second & osg::StateAttribute::OVERRIDE)
|
|
mRequirements.back().mBlendFuncOverridden = true;
|
|
|
|
const osg::BlendFunc* blend = static_cast<const osg::BlendFunc*>(it->second.first.get());
|
|
if (blend->getSource() == osg::BlendFunc::SRC_ALPHA || blend->getSource() == osg::BlendFunc::SRC_COLOR)
|
|
alphaTestShadows = true;
|
|
alphaSettingsChanged = true;
|
|
}
|
|
}
|
|
}
|
|
// we don't need to check for glEnable/glDisable of blending and testing as we always set it at the same time
|
|
if (alphaSettingsChanged)
|
|
{
|
|
if (!writableStateSet)
|
|
writableStateSet = getWritableStateSet(node);
|
|
writableStateSet->addUniform(alphaTestShadows ? mShaderManager.getShadowMapAlphaTestEnableUniform() : mShaderManager.getShadowMapAlphaTestDisableUniform());
|
|
}
|
|
}
|
|
|
|
void ShaderVisitor::pushRequirements(osg::Node& node)
|
|
{
|
|
mRequirements.push_back(mRequirements.back());
|
|
mRequirements.back().mNode = &node;
|
|
}
|
|
|
|
void ShaderVisitor::popRequirements()
|
|
{
|
|
mRequirements.pop_back();
|
|
}
|
|
|
|
void ShaderVisitor::createProgram(const ShaderRequirements &reqs)
|
|
{
|
|
if (!reqs.mShaderRequired && !mForceShaders)
|
|
return;
|
|
|
|
osg::Node& node = *reqs.mNode;
|
|
osg::StateSet* writableStateSet = nullptr;
|
|
if (mAllowedToModifyStateSets)
|
|
writableStateSet = node.getOrCreateStateSet();
|
|
else
|
|
writableStateSet = getWritableStateSet(node);
|
|
|
|
ShaderManager::DefineMap defineMap;
|
|
for (unsigned int i=0; i<sizeof(defaultTextures)/sizeof(defaultTextures[0]); ++i)
|
|
{
|
|
defineMap[defaultTextures[i]] = "0";
|
|
defineMap[std::string(defaultTextures[i]) + std::string("UV")] = "0";
|
|
}
|
|
for (std::map<int, std::string>::const_iterator texIt = reqs.mTextures.begin(); texIt != reqs.mTextures.end(); ++texIt)
|
|
{
|
|
defineMap[texIt->second] = "1";
|
|
defineMap[texIt->second + std::string("UV")] = std::to_string(texIt->first);
|
|
}
|
|
|
|
defineMap["parallax"] = reqs.mNormalHeight ? "1" : "0";
|
|
|
|
writableStateSet->addUniform(new osg::Uniform("colorMode", reqs.mColorMode));
|
|
|
|
osg::ref_ptr<osg::Shader> vertexShader (mShaderManager.getShader(mDefaultVsTemplate, defineMap, osg::Shader::VERTEX));
|
|
osg::ref_ptr<osg::Shader> fragmentShader (mShaderManager.getShader(mDefaultFsTemplate, defineMap, osg::Shader::FRAGMENT));
|
|
|
|
if (vertexShader && fragmentShader)
|
|
{
|
|
writableStateSet->setAttributeAndModes(mShaderManager.getProgram(vertexShader, fragmentShader), osg::StateAttribute::ON);
|
|
|
|
for (std::map<int, std::string>::const_iterator texIt = reqs.mTextures.begin(); texIt != reqs.mTextures.end(); ++texIt)
|
|
{
|
|
writableStateSet->addUniform(new osg::Uniform(texIt->second.c_str(), texIt->first), osg::StateAttribute::ON);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ShaderVisitor::adjustGeometry(osg::Geometry& sourceGeometry, const ShaderRequirements& reqs)
|
|
{
|
|
bool useShader = reqs.mShaderRequired || mForceShaders;
|
|
bool generateTangents = reqs.mTexStageRequiringTangents != -1;
|
|
bool changed = false;
|
|
|
|
if (mAllowedToModifyStateSets && (useShader || generateTangents))
|
|
{
|
|
// make sure that all UV sets are there
|
|
for (std::map<int, std::string>::const_iterator it = reqs.mTextures.begin(); it != reqs.mTextures.end(); ++it)
|
|
{
|
|
if (sourceGeometry.getTexCoordArray(it->first) == nullptr)
|
|
{
|
|
sourceGeometry.setTexCoordArray(it->first, sourceGeometry.getTexCoordArray(0));
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if (generateTangents)
|
|
{
|
|
osg::ref_ptr<osgUtil::TangentSpaceGenerator> generator (new osgUtil::TangentSpaceGenerator);
|
|
generator->generate(&sourceGeometry, reqs.mTexStageRequiringTangents);
|
|
|
|
sourceGeometry.setTexCoordArray(7, generator->getTangentArray(), osg::Array::BIND_PER_VERTEX);
|
|
changed = true;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
void ShaderVisitor::apply(osg::Geometry& geometry)
|
|
{
|
|
bool needPop = (geometry.getStateSet() != nullptr);
|
|
if (geometry.getStateSet()) // TODO: check if stateset affects shader permutation before pushing it
|
|
{
|
|
pushRequirements(geometry);
|
|
applyStateSet(geometry.getStateSet(), geometry);
|
|
}
|
|
|
|
if (!mRequirements.empty())
|
|
{
|
|
const ShaderRequirements& reqs = mRequirements.back();
|
|
|
|
adjustGeometry(geometry, reqs);
|
|
|
|
createProgram(reqs);
|
|
}
|
|
|
|
if (needPop)
|
|
popRequirements();
|
|
}
|
|
|
|
void ShaderVisitor::apply(osg::Drawable& drawable)
|
|
{
|
|
// non-Geometry drawable (e.g. particle system)
|
|
bool needPop = (drawable.getStateSet() != nullptr);
|
|
|
|
if (drawable.getStateSet())
|
|
{
|
|
pushRequirements(drawable);
|
|
applyStateSet(drawable.getStateSet(), drawable);
|
|
}
|
|
|
|
if (!mRequirements.empty())
|
|
{
|
|
const ShaderRequirements& reqs = mRequirements.back();
|
|
createProgram(reqs);
|
|
|
|
if (auto rig = dynamic_cast<SceneUtil::RigGeometry*>(&drawable))
|
|
{
|
|
osg::ref_ptr<osg::Geometry> sourceGeometry = rig->getSourceGeometry();
|
|
if (sourceGeometry && adjustGeometry(*sourceGeometry, reqs))
|
|
rig->setSourceGeometry(sourceGeometry);
|
|
}
|
|
else if (auto morph = dynamic_cast<SceneUtil::MorphGeometry*>(&drawable))
|
|
{
|
|
osg::ref_ptr<osg::Geometry> sourceGeometry = morph->getSourceGeometry();
|
|
if (sourceGeometry && adjustGeometry(*sourceGeometry, reqs))
|
|
morph->setSourceGeometry(sourceGeometry);
|
|
}
|
|
}
|
|
|
|
if (needPop)
|
|
popRequirements();
|
|
}
|
|
|
|
void ShaderVisitor::setAllowedToModifyStateSets(bool allowed)
|
|
{
|
|
mAllowedToModifyStateSets = allowed;
|
|
}
|
|
|
|
void ShaderVisitor::setAutoUseNormalMaps(bool use)
|
|
{
|
|
mAutoUseNormalMaps = use;
|
|
}
|
|
|
|
void ShaderVisitor::setNormalMapPattern(const std::string &pattern)
|
|
{
|
|
mNormalMapPattern = pattern;
|
|
}
|
|
|
|
void ShaderVisitor::setNormalHeightMapPattern(const std::string &pattern)
|
|
{
|
|
mNormalHeightMapPattern = pattern;
|
|
}
|
|
|
|
void ShaderVisitor::setAutoUseSpecularMaps(bool use)
|
|
{
|
|
mAutoUseSpecularMaps = use;
|
|
}
|
|
|
|
void ShaderVisitor::setSpecularMapPattern(const std::string &pattern)
|
|
{
|
|
mSpecularMapPattern = pattern;
|
|
}
|
|
|
|
}
|