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openmw/components/sceneutil/rtt.cpp

107 lines
4.2 KiB
C++

#include "rtt.hpp"
#include "util.hpp"
#include <osg/Node>
#include <osg/NodeVisitor>
#include <osg/Texture2D>
#include <osgUtil/CullVisitor>
#include <components/sceneutil/nodecallback.hpp>
#include <components/settings/settings.hpp>
namespace SceneUtil
{
class CullCallback : public SceneUtil::NodeCallback<CullCallback, RTTNode*, osgUtil::CullVisitor*>
{
public:
void operator()(RTTNode* node, osgUtil::CullVisitor* cv)
{
node->cull(cv);
}
};
RTTNode::RTTNode(uint32_t textureWidth, uint32_t textureHeight, int renderOrderNum, bool doPerViewMapping)
: mTextureWidth(textureWidth)
, mTextureHeight(textureHeight)
, mRenderOrderNum(renderOrderNum)
, mDoPerViewMapping(doPerViewMapping)
{
addCullCallback(new CullCallback);
setCullingActive(false);
}
RTTNode::~RTTNode()
{
}
void RTTNode::cull(osgUtil::CullVisitor* cv)
{
auto* vdd = getViewDependentData(cv);
apply(vdd->mCamera);
vdd->mCamera->accept(*cv);
}
osg::Texture* RTTNode::getColorTexture(osgUtil::CullVisitor* cv)
{
return getViewDependentData(cv)->mCamera->getBufferAttachmentMap()[osg::Camera::COLOR_BUFFER]._texture;
}
osg::Texture* RTTNode::getDepthTexture(osgUtil::CullVisitor* cv)
{
return getViewDependentData(cv)->mCamera->getBufferAttachmentMap()[osg::Camera::DEPTH_BUFFER]._texture;
}
RTTNode::ViewDependentData* RTTNode::getViewDependentData(osgUtil::CullVisitor* cv)
{
if (!mDoPerViewMapping)
// Always setting it to null is an easy way to disable per-view mapping when mDoPerViewMapping is false.
// This is safe since the visitor is never dereferenced.
cv = nullptr;
if (mViewDependentDataMap.count(cv) == 0)
{
auto camera = new osg::Camera();
mViewDependentDataMap[cv].reset(new ViewDependentData);
mViewDependentDataMap[cv]->mCamera = camera;
camera->setRenderOrder(osg::Camera::PRE_RENDER, mRenderOrderNum);
camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
camera->setViewport(0, 0, mTextureWidth, mTextureHeight);
setDefaults(mViewDependentDataMap[cv]->mCamera.get());
// Create any buffer attachments not added in setDefaults
if (camera->getBufferAttachmentMap().count(osg::Camera::COLOR_BUFFER) == 0)
{
auto colorBuffer = new osg::Texture2D;
colorBuffer->setTextureSize(mTextureWidth, mTextureHeight);
colorBuffer->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
colorBuffer->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
colorBuffer->setInternalFormat(GL_RGB);
colorBuffer->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
colorBuffer->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
camera->attach(osg::Camera::COLOR_BUFFER, colorBuffer);
SceneUtil::attachAlphaToCoverageFriendlyFramebufferToCamera(camera, osg::Camera::COLOR_BUFFER, colorBuffer);
}
if (camera->getBufferAttachmentMap().count(osg::Camera::DEPTH_BUFFER) == 0)
{
auto depthBuffer = new osg::Texture2D;
depthBuffer->setTextureSize(mTextureWidth, mTextureHeight);
depthBuffer->setSourceFormat(GL_DEPTH_COMPONENT);
depthBuffer->setInternalFormat(GL_DEPTH_COMPONENT24);
depthBuffer->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
depthBuffer->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
depthBuffer->setSourceType(GL_UNSIGNED_INT);
depthBuffer->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
depthBuffer->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
camera->attach(osg::Camera::DEPTH_BUFFER, depthBuffer);
}
}
return mViewDependentDataMap[cv].get();
}
}