//------------------------------------------------------------------------------
ShaderParameters ReadShaderParameters( std::istream& in )
{
ShaderParameters params;
static const char COMMENT_CHAR = '#';
static const std::string ASSIGNMENT_OPERATOR = "=";
int lineCount = 0;
std::string lineBuffer;
while( std::getline( in, lineBuffer ) )
{
++lineCount;
if( lineBuffer.size() == 0 ) continue;
std::istringstream is( lineBuffer );
std::string firstToken;
is >> firstToken; // type
if( firstToken[ 0 ] == COMMENT_CHAR ) continue;
if( ShaderParameterType( firstToken ) == ShaderParameter::GLSL_INVALID_TYPE )
{
std::ostringstream os;
os << lineCount;
throw ShaderParameterException( "Invalid type at line " + os.str() );
}
std::string secondToken;
is >> secondToken; // identifier name
if( secondToken.size() == 0 )
{
std::ostringstream os;
os << lineCount;
throw ShaderParameterException( "Missing Identifier at line " + os.str() );
break;
}
params.push_back( BuildShaderParameter( firstToken, secondToken, is ) );
}
return params;
}
//----------------------------------------------------------------------------
void Renderer::Enable (const Renderable* renderable,
const MaterialInstance* instance, int index)
{
const MaterialPass* pass = instance->GetPass(index);
ShaderParameters* vparams = instance->GetVertexParameters(index);
ShaderParameters* pparams = instance->GetPixelParameters(index);
VertexShader* vshader = pass->GetVertexShader();
PixelShader* pshader = pass->GetPixelShader();
// 更新着色器常量
vparams->UpdateConstants(renderable, mCamera);
pparams->UpdateConstants(renderable, mCamera);
// 设置渲染状态
SetAlphaProperty(pass->GetAlphaProperty());
SetCullProperty(pass->GetCullProperty());
SetDepthProperty(pass->GetDepthProperty());
SetOffsetProperty(pass->GetOffsetProperty());
SetStencilProperty(pass->GetStencilProperty());
SetWireProperty(pass->GetWireProperty());
// 激活着色器
Enable(vshader, vparams);
Enable(pshader, pparams);
}
//-----------------------------------------------------------------------------
void SetShaderParameters( GLuint program, ShaderParameters& params )
{
glUseProgram( program );
ShaderParameters::iterator i = params.begin();
for( ; i != params.end(); ++i )
{
i->SetShaderParameter( program );
}
glUseProgram( 0 );
}
//----------------------------------------------------------------------------
void Renderer::Enable (const Renderable* renderable,
const MaterialInstance* instance, int index)
{
const MaterialPass* pass = instance->GetPass(index);
MaterialPassMap::iterator iter = mMaterialPasses.find(pass);
PdrMaterialPass *pdrMaterialPass;
if (iter != mMaterialPasses.end())
{
pdrMaterialPass = iter->second;
}
else
{
pdrMaterialPass = new0 PdrMaterialPass(this, pass);
mMaterialPasses[pass] = pdrMaterialPass;
}
ShaderParameters* vparams = instance->GetVertexParameters(index);
ShaderParameters* pparams = instance->GetPixelParameters(index);
VertexShader* vshader = pass->GetVertexShader();
PixelShader* pshader = pass->GetPixelShader();
// 更新着色器常量
vparams->UpdateConstants(renderable, mCamera);
pparams->UpdateConstants(renderable, mCamera);
// 设置渲染状态
SetAlphaProperty(pass->GetAlphaProperty());
SetCullProperty(pass->GetCullProperty());
SetDepthProperty(pass->GetDepthProperty());
SetOffsetProperty(pass->GetOffsetProperty());
SetStencilProperty(pass->GetStencilProperty());
SetWireProperty(pass->GetWireProperty());
// 激活着色器
pdrMaterialPass->Enable(this);
Enable(vshader, vparams);
Enable(pshader, pparams);
}
//----------------------------------------------------------------------------
void Renderer::Enable (const Renderable* renderable,
const MaterialInstance* instance, int index)
{
const MaterialPass* pass = instance->GetPass(index);
PdrMaterialPass *pdrMaterialPass = 0;
if (1 == (int)msRenderers.size())
{
if (pass->PdrPointer)
{
pdrMaterialPass = (PdrMaterialPass*)pass->PdrPointer;
}
else
{
pdrMaterialPass = new0 PdrMaterialPass(this, pass);
mMaterialPasses[pass] = pdrMaterialPass;
((MaterialPass*)pass)->PdrPointer = pdrMaterialPass;
}
}
else
{
MaterialPassMap::iterator iter = mMaterialPasses.find(pass);
if (iter != mMaterialPasses.end())
{
pdrMaterialPass = iter->second;
}
else
{
pdrMaterialPass = new0 PdrMaterialPass(this, pass);
mMaterialPasses[pass] = pdrMaterialPass;
}
}
ShaderParameters* vparams = instance->GetVertexParameters(index);
ShaderParameters* pparams = instance->GetPixelParameters(index);
VertexShader* vshader = pass->GetVertexShader();
PixelShader* pshader = pass->GetPixelShader();
ShaderStruct struc;
struc.TheRenderable = (Renderable *)renderable;
struc.TheCamera = (Camera *)mCamera;
struc.TheEnvirParam = PX2_GR.GetCurEnvirParam();
// 更新着色器常量
vparams->UpdateConstants(&struc);
pparams->UpdateConstants(&struc);
// 设置渲染状态
SetAlphaProperty(pass->GetAlphaProperty());
SetCullProperty(pass->GetCullProperty());
SetDepthProperty(pass->GetDepthProperty());
SetOffsetProperty(pass->GetOffsetProperty());
SetStencilProperty(pass->GetStencilProperty());
SetWireProperty(pass->GetWireProperty());
// 激活着色器
pdrMaterialPass->Enable(this);
Enable(vshader, vparams);
Enable(pshader, pparams);
}