// Append a blend (non-interaction) layer
void OpenGLShader::appendBlendLayer (const ShaderLayer& layer)
{
GLTexture* layerTex = layer.getTexture();
OpenGLState& state = appendDefaultPass();
state.m_state = RENDER_FILL | RENDER_BLEND | RENDER_DEPTHTEST | RENDER_COLOURWRITE | RENDER_COLOURCHANGE | RENDER_TEXTURE_2D;
state.m_depthfunc = GL_LEQUAL;
// Set the texture
state.m_texture = layerTex->texture_number;
// Get the blend function
BlendFunc blendFunc = layer.getBlendFunc();
state.m_blend_src = convertBlendFactor(blendFunc.m_src);
state.m_blend_dst = convertBlendFactor(blendFunc.m_dst);
// Alpha-tested stages or one-over-zero blends should use the depth buffer
if (state.m_blend_src == GL_SRC_ALPHA || state.m_blend_dst == GL_SRC_ALPHA || (state.m_blend_src == GL_ONE
&& state.m_blend_dst == GL_ZERO)) {
state.m_state |= RENDER_DEPTHWRITE;
}
// Colour modulation
state.m_colour = Vector4(layer.getColour(), 1.0f);
state.m_sort = OpenGLState::eSortOverlayFirst;
// Polygon offset
state.m_polygonOffset = layer.getPolygonOffset();
}
//-----------------------------------------------------------------------
void parseSceneBlend(StringVector::iterator& params, int numParams, MaterialPtr& pMat)
{
// Should be 1 or 2 params (+ command)
if (numParams == 2)
{
//simple
SceneBlendType stype;
if (params[1] == "add")
stype = SBT_ADD;
else if (params[1] == "modulate")
stype = SBT_TRANSPARENT_COLOUR;
else if (params[1] == "alpha_blend")
stype = SBT_TRANSPARENT_ALPHA;
else
{
LogManager::getSingleton().logMessage("Bad scene_blend attribute line in "
+ pMat->getName() + ", unrecognised parameter '" + params[1] + "'");
return ;
}
pMat->setSceneBlending(stype);
}
else if (numParams == 3)
{
//src/dest
SceneBlendFactor src, dest;
try {
src = convertBlendFactor(params[1]);
dest = convertBlendFactor(params[2]);
pMat->setSceneBlending(src,dest);
}
catch (Exception& e)
{
LogManager::getSingleton().logMessage("Bad scene_blend attribute line in "
+ pMat->getName() + ", " + e.getFullDescription());
}
}
else
{
LogManager::getSingleton().logMessage("Bad scene_blend attribute line in "
+ pMat->getName() + ", wrong number of parameters (expected 1 or 2)");
}
}
//-----------------------------------------------------------------------
void parseColourOpFallback(StringVector::iterator& params, int numParams, MaterialPtr& pMat, TextureUnitState* pTex)
{
if (numParams != 3)
{
LogManager::getSingleton().logMessage("Bad " + params[0] + " attribute line in "
+ pMat->getName() + ", wrong number of parameters (expected 2)");
return;
}
//src/dest
SceneBlendFactor src, dest;
try {
src = convertBlendFactor(params[1]);
dest = convertBlendFactor(params[2]);
pTex->setColourOpMultipassFallback(src,dest);
}
catch (Exception& e)
{
LogManager::getSingleton().logMessage("Bad "+ params[0] +" attribute line in "
+ pMat->getName() + ", " + e.getFullDescription());
}
}
void OpenGLShader::constructNormalShader (const std::string& name)
{
// construction from IShader
m_shader = GlobalShaderSystem().getShaderForName(name);
OpenGLState& state = appendDefaultPass();
state.m_texture = m_shader->getTexture()->texture_number;
state.m_state = RENDER_FILL | RENDER_TEXTURE_2D | RENDER_DEPTHTEST | RENDER_COLOURWRITE | RENDER_LIGHTING
| RENDER_SMOOTH;
state.m_state |= RENDER_CULLFACE;
if ((m_shader->getFlags() & QER_ALPHATEST) != 0) {
state.m_state |= RENDER_ALPHATEST;
state.m_colour[3] = 0.25;
IShader::EAlphaFunc alphafunc;
m_shader->getAlphaFunc(&alphafunc, &state.m_alpharef);
switch (alphafunc) {
case IShader::eAlways:
state.m_alphafunc = GL_ALWAYS;
case IShader::eEqual:
state.m_alphafunc = GL_EQUAL;
case IShader::eLess:
state.m_alphafunc = GL_LESS;
case IShader::eGreater:
state.m_alphafunc = GL_GREATER;
case IShader::eLEqual:
state.m_alphafunc = GL_LEQUAL;
case IShader::eGEqual:
state.m_alphafunc = GL_GEQUAL;
}
}
state.m_colour = Vector4(m_shader->getTexture()->color, 1.0);
if (isTransparent(m_shader->getName())) {
state.m_state |= RENDER_BLEND;
state.m_state |= RENDER_DEPTHWRITE;
state.m_colour = Vector4(1.0, 1.0, 1.0, 0.4);
state.m_sort = OpenGLState::eSortTranslucent;
} else if ((m_shader->getFlags() & QER_TRANS) != 0) {
state.m_state |= RENDER_BLEND;
state.m_colour[3] = m_shader->getTrans();
BlendFunc blendFunc = m_shader->getBlendFunc();
state.m_blend_src = convertBlendFactor(blendFunc.m_src);
state.m_blend_dst = convertBlendFactor(blendFunc.m_dst);
if (state.m_blend_src == GL_SRC_ALPHA || state.m_blend_dst == GL_SRC_ALPHA) {
state.m_state |= RENDER_DEPTHWRITE;
}
state.m_sort = OpenGLState::eSortTranslucent;
} else if (m_shader->getTexture()->hasAlpha) {
state.m_state |= RENDER_BLEND;
state.m_state |= RENDER_DEPTHWRITE;
state.m_sort = OpenGLState::eSortTranslucent;
} else {
state.m_state |= RENDER_DEPTHWRITE;
state.m_sort = OpenGLState::eSortFullbright;
}
m_shader->forEachLayer(ShaderLayerVisitor(*this));
}
