//------------------------------------------------------------------------------
void UnitInMipmapOut::init()
{
// default initialization
UnitInOut::init();
// if we have to create mipmaps for an input texture
if (mGenerateMipmapInputIndex >= 0)
{
setOutputTexture(getInputTexture(mGenerateMipmapInputIndex));
assignOutputTexture();
}
// enable mipmap levels in the output texture
enableMipmapGeneration();
// if generating of mipmaps done in software, then generate drawables
if (mUseShader)
{
// disable standard fbo
//getOrCreateStateSet()->removeAttribute(mFBO.get());
getOrCreateStateSet()->removeAttribute(mViewport.get());
// this is the base level of mipmap generation
// if the output texture is the same as input texture, then
// we do not need to recompute the level 0, because it should
// stay the same.
int baseLevel = (mGenerateMipmapInputIndex < 0 ? 0 : 1);
// attach a drawable for each mipmap level
for (int i = baseLevel; i < mNumLevels; i++)
{
// setup the drawable
osg::Drawable* draw = mMipmapDrawable[i];
osg::StateSet* ss = draw->getOrCreateStateSet();
// setup drawable uniforms
osg::Uniform* w = ss->getOrCreateUniform(OSGPPU_VIEWPORT_WIDTH_UNIFORM, osg::Uniform::FLOAT);
osg::Uniform* h = ss->getOrCreateUniform(OSGPPU_VIEWPORT_HEIGHT_UNIFORM, osg::Uniform::FLOAT);
w->set((float)mMipmapViewport[i]->width());
h->set((float)mMipmapViewport[i]->height());
osg::Uniform* iw = ss->getOrCreateUniform(OSGPPU_VIEWPORT_INV_WIDTH_UNIFORM, osg::Uniform::FLOAT);
osg::Uniform* ih = ss->getOrCreateUniform(OSGPPU_VIEWPORT_INV_HEIGHT_UNIFORM, osg::Uniform::FLOAT);
iw->set(1.0f / (float)mMipmapViewport[i]->width());
ih->set(1.0f / (float)mMipmapViewport[i]->height());
osg::Uniform* ln = ss->getOrCreateUniform(OSGPPU_MIPMAP_LEVEL_NUM_UNIFORM, osg::Uniform::FLOAT);
ln->set((float)mNumLevels);
osg::Uniform* le = ss->getOrCreateUniform(OSGPPU_MIPMAP_LEVEL_UNIFORM, osg::Uniform::FLOAT);
le->set((float)i);
}
}
}
void GausBlur::apply() {
assert(m_inputTexure[0] && "GausBlur::calculate: Input texture not specified");
//
// First pass.
//
m_rai->setActiveShaderProgram(m_shaderProgram);
m_rai->setActiveVertexArray(m_va);
xdl::xdl_uint targets [] = {xdl::XDEVL_COLOR_TARGET0};
m_frameBuffer->activate();
m_frameBuffer->activateColorTargets(1, targets);
m_frameBuffer->clearColorTargets(0.0f, 0.0f, 0.0f, 0.0f);
m_shaderProgram->activate();
m_shaderProgram->setUniformi(m_blurDirectionid, 0);
m_shaderProgram->setUniform2v(m_blurSizeid,1, m_blurSize);
m_shaderProgram->setUniformi(m_textureid, 0);
m_inputTexure[0]->activate(0);
m_rai->drawVertexArray(xdl::XDEVL_PRIMITIVE_TRIANGLES, 6);
m_frameBuffer->deactivate();
//
// Second pass
//
m_frameBuffer2->activate();
m_frameBuffer2->activateColorTargets(1, targets);
m_frameBuffer2->clearColorTargets(1.0f, 0.0f, 0.0f, 0.0f);
m_shaderProgram->activate();
m_shaderProgram->setUniformi(m_blurDirectionid, 1);
m_shaderProgram->setUniform2v(m_blurSizeid, 1, m_blurSize);
m_shaderProgram->setUniformi(m_textureid, 0);
m_frameBuffer->getTexture(0)->activate(0);
m_rai->drawVertexArray(xdl::XDEVL_PRIMITIVE_TRIANGLES, 6);
m_frameBuffer2->deactivate();
// This is important. Set the output texture.
setOutputTexture(0, m_frameBuffer2->getTexture(0));
}
