bool CGFXShader::LoadFromFile(const char* szFile)
{
HRESULT hr = S_OK;
char buffer[128];
m_pEffect = cgCreateEffectFromFile( m_pCG, szFile, NULL );
CGerror error;
const char *string = cgGetLastErrorString(&error);
static char szError[1024];
if( error != CG_NO_ERROR )
{
if( error == CG_COMPILER_ERROR )
{
sprintf(szError,
"Program: %s\n"
"Error: %s\n\n"
"Cg compiler output...\n%s",
szFile, string,
cgGetLastListing(m_pCG));
}
else
{
sprintf(szError,
"Program: %s\n"
"Error: %s",
szFile, string);
}
OutputDebugStringA(szError);
OutputDebugStringA("\n");
}
if(m_pEffect == NULL)
{
return false;
}
CGtechnique pTechnique = cgGetFirstTechnique( m_pEffect );
while( pTechnique && cgValidateTechnique( pTechnique ) == CG_FALSE )
{
pTechnique = cgGetNextTechnique( pTechnique );
}
if( pTechnique == NULL)
{
return false;
}
m_pTechnique = pTechnique;
return true;
}
bool cEffect::Init(const std::string &lacNameId, const std::string &lacFile)
{
//Initialization of the class atributes
macFile = lacFile;
macLastTechnique = "";
mEffect = NULL;
mTechnique = NULL;
mCurrentPass = NULL;
mbLoaded = false;
//Loading of the effect
CGcontext lCGContext = cEffectManager::Get().GetCGContext();
mEffect = cgCreateEffectFromFile(lCGContext, lacFile.c_str(), NULL);
if (!mEffect) {
OutputDebugString("Unable to create effect\n");
const char *lacListing = cgGetLastListing(lCGContext);
if (lacListing)
{
char lacBuffer[512];
sprintf(lacBuffer, "%s\n", lacListing);
OutputDebugString(lacBuffer);
}
return false;
}
// Check if the techniques are valid
CGtechnique lTechnique = cgGetFirstTechnique(mEffect);
while (lTechnique) {
if (cgValidateTechnique(lTechnique) == CG_FALSE)
{
char lacBuffer[512];
sprintf(lacBuffer, "Technique %s did not validate. Skipping. \n", cgGetTechniqueName(lTechnique));
OutputDebugString( lacBuffer );
const char *lacListing = cgGetLastListing(lCGContext);
if (lacListing)
{
char lacBuffer[512];
sprintf(lacBuffer, "%s\n", lacListing);
OutputDebugString(lacBuffer);
}
}
lTechnique = cgGetNextTechnique(lTechnique);
}
mbLoaded = true;
return true;
}
void cgfxTechnique::validate() const
{
fValid = (cgValidateTechnique(fTechnique) == CG_TRUE);
if (fValid) {
fErrorString = "";
}
else {
CGerror error = cgGetError();
if (error != CG_NO_ERROR) {
fErrorString = cgGetErrorString(cgGetError());
}
fErrorString += "\nCg compilation errors for technique \"";
fErrorString += fName;
fErrorString += "\":\n";
fErrorString += cgGetLastListing(cgfxShaderNode::sCgContext);
fErrorString += "\n";
}
}
void Effect::load(const char* code)
{
effect.reset(cgCreateEffect(context, code, 0), EffectDeleter());
if (!effect)
{
throw std::runtime_error("Could not create effect");
}
technique = cgGetNamedTechnique(effect.get(), "High");
if (technique == 0)
{
throw std::runtime_error("Technique not found");
}
if (cgValidateTechnique(technique) == false)
{
throw std::runtime_error("Technique not valid");
}
}
bool CgFXTechnique::validate(CgFXMaterial *pMat,
DrawEnv *pEnv)
{
if(0x00 == (_uiValidationState & ValidationTried))
{
#if 0
fprintf(stderr, "Validate %p\n", _pCGTechnique);
#endif
_uiValidationState = 0x03;
#if 0
if(pWin != NULL)
{
pWin->activate();
}
#endif
if(_pCGTechnique == NULL ||
cgValidateTechnique(_pCGTechnique) == CG_FALSE )
{
CgFXMaterial::checkForCgError("cgValidateTechnique", NULL);
_uiValidationState = 0x02;
}
else
{
CgFXMaterial::checkForCgError("cgValidateTechnique", NULL);
const CgFXMaterial::MFTexturesType *pTextures =
pMat->getMFTextures();
CGpass pPass = cgGetFirstPass(_pCGTechnique);
CgFXMaterial::checkForCgError("cgGetFirstPass", NULL);
for(UInt32 i = 0; i < pTextures->size(); ++i)
{
const Char8 *szTexParamName = getName((*pTextures)[i]);
Int32 iTexParamVal = -1;
const ShaderVariable *pVar = pMat->getVariable(szTexParamName);
OSG_ASSERT(pVar != NULL);
const CgFXVariableTexObj *pTexVar =
static_cast<const CgFXVariableTexObj *>(pVar);
OSG_ASSERT(pTexVar != NULL);
iTexParamVal = pTexVar->getValue();
if(iTexParamVal == -1)
{
CGparameter pParam =
cgGetNamedEffectParameter(pMat->getEffect(),
szTexParamName);
CgFXMaterial::checkForCgError("cgGetNamedEffectParameter",
NULL);
(*pTextures)[i]->activate(pEnv, 0);
Window::GLObjectId texObjId =
pEnv->getWindow()->getGLObjectId(
(*pTextures)[i]->getGLId());
cgGLSetTextureParameter(pParam, texObjId);
CgFXMaterial::checkForCgError("cgGLSetTextureParameter",
NULL);
cgSetSamplerState (pParam );
CgFXMaterial::checkForCgError("cgSetSamplerState",
NULL);
CgFXVariableTexObj *pTexVarW =
const_cast<CgFXVariableTexObj *>(pTexVar);
pTexVarW->setValue(texObjId);
(*pTextures)[i]->deactivate(pEnv);
}
}
int count = 0;
while(pPass)
{
StateUnrecPtr pState = State ::create();
CgFXPassChunkUnrecPtr pChunk = CgFXPassChunk::create();
pChunk->setPass (pPass);
pChunk->setMaterial(pMat );
pState->addChunk(pChunk);
this->addPassState(pState);
pPass = cgGetNextPass(pPass);
CgFXMaterial::checkForCgError("cgGetNextPass", NULL);
count++;
}
pMat->updateUniformVariables();
}
#if 0
if(_pCGTechnique != NULL)
{
fprintf(stderr, "Validated technique %s : %x\n",
cgGetTechniqueName(_pCGTechnique),
UInt32(_uiValidationState));
}
#endif
#if 0
if(pWin != NULL)
{
pWin->deactivate();
}
#endif
}
return (_uiValidationState & TechniqueValid);
}
/*-------------------------------------------------------------------------
-------------------------------------------------------------------------*/
void FilterBox::Draw(float f)
{
if(!bValid)
return;
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL);
CGbool bRes;
bRes = cgValidateTechnique(cgTechnique);
if(!bRes)
{
bValid = false;
const char * pszErrors = NULL;
fprintf(stderr, "Validation of FilterRect failed");
fprintf(stderr, "CgFx Parse error : %s", pszErrors);
const char *listing = cgGetLastListing(cgContext);
return;
}
//
// intermediate stage : bluring horizontal
//
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb[1]);
glPushAttrib(GL_VIEWPORT_BIT);
glViewport(0,0,bufw,bufh);
cgGLSetupSampler(srcSampler, textureID[0]);
cgSetPassState(cgPassFilterH);
FULLSCRQUAD();
glPopAttrib();
//
// intermediate stage : bluring vertical
//
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb[0]);
glPushAttrib(GL_VIEWPORT_BIT);
glViewport(0,0,bufw,bufh);
cgGLSetupSampler(srcSampler, textureID[1]);
cgSetPassState(cgPassFilterV);
FULLSCRQUAD();
glPopAttrib();
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
//
// Final stage : Blend the final texture to the screen
//
cgGLSetupSampler(tempSampler, textureID[0]);
cgSetPassState(cgPassBlend);
glBlendColor(f,f,f,f);
float xoffset = -1.0f + 2.0f*(float)posx/(float)vpw;
float yoffset = -1.0f + 2.0f*(float)posy/(float)vph;
float xoffset2 = xoffset + 2.0f*(float)width/(float)vpw;
float yoffset2 = yoffset + 2.0f*(float)height/(float)vph;
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex4f(xoffset, yoffset, 0,1);
glTexCoord2f(1,0);
glVertex4f(xoffset2, yoffset,0,1);
glTexCoord2f(1,1);
glVertex4f(xoffset2, yoffset2,0,1);
glTexCoord2f(0,1);
glVertex4f(xoffset, yoffset2,0,1);
glEnd();
cgResetPassState(cgPassBlend);
}