/*!****************************************************************************
@Function ReleaseView
@Return bool true if no error occurred
@Description Code in ReleaseView() will be called by PVRShell when the
application quits or before a change in the rendering context.
******************************************************************************/
bool OGLES3MagicLantern::ReleaseView()
{
// Delete all effects.
for (unsigned int i=0; i<m_ppEffectParser->GetNumberEffects(); i++)
{
delete m_pFX[i];
}
// Delete the PFX container.
delete m_ppEffectParser;
// Delete buffer objects.
glDeleteBuffers(m_Scene.nNumMesh, m_puiVbo);
glDeleteBuffers(m_Scene.nNumMesh, m_puiIndexVbo);
// Release loaded textures
for(unsigned int uiIndex = 0; uiIndex < m_TextureCache.GetSize(); ++uiIndex)
{
GLuint uiHandle = m_TextureCache.GetDataAtIndex(uiIndex)->uiHandle;
glDeleteTextures(1, &uiHandle);
}
m_TextureCache.Clear();
// Release Print3D Textures
m_Print3D.ReleaseTextures();
return true;
}
/*!***************************************************************************
@Function PVRTPFXOnLoadTexture
@Input TextureName
@Output uiHandle
@Output uiFlags
@Return EPVRTError PVR_SUCCESS on success.
@Description Callback function on texture load.
*****************************************************************************/
EPVRTError OGLES3MagicLantern::PVRTPFXOnLoadTexture(const CPVRTStringHash& TextureName, GLuint& uiHandle, unsigned int& uiFlags)
{
/*
Because we have multiple effects being loaded yet the textures remain the same we can
efficiently cache texture IDs and only load a texture once but assign it to
multiple effects.
*/
// Check if the texture already exists in the map
if(m_TextureCache.Exists(TextureName))
{
const STextureData& TexData = m_TextureCache[TextureName];
uiHandle = TexData.uiHandle;
uiFlags = TexData.uiFlags;
return PVR_SUCCESS;
}
// Texture is not loaded. Load and add to the map.
PVRTextureHeaderV3 sHeader;
if(PVRTTextureLoadFromPVR(TextureName.c_str(), &uiHandle, &sHeader) != PVR_SUCCESS)
return PVR_FAIL;
uiFlags = 0;
if(sHeader.u32NumFaces == 6)
uiFlags |= PVRTEX_CUBEMAP;
STextureData& TexData = m_TextureCache[TextureName];
TexData.uiFlags = uiFlags;
TexData.uiHandle = uiHandle;
return PVR_SUCCESS;
}
/*!****************************************************************************
@Function LoadTextures
@Output pErrorStr A CPVRTString describing the error on failure
@Return bool true if no error occured
@Description Loads the textures required for this training course
******************************************************************************/
bool OGLES3ShadowMapping::LoadTextures(CPVRTString* const pszErrorStr)
{
for (unsigned int i=0; i < c_uiNumTextureNames; i++)
{
// Check if the texture already exists in the map
if(m_TextureCache.Exists(c_sTextureNames[i]))
continue;
CPVRTString filename = c_sTextureNames[i].String() + CPVRTString(".pvr");
// Texture is not loaded. Load and add to the map.
GLuint uiHandle;
PVRTextureHeaderV3 sHeader;
if(PVRTTextureLoadFromPVR(filename.c_str(), &uiHandle, &sHeader) != PVR_SUCCESS)
{
*pszErrorStr = CPVRTString("Failed to load texture: ") + filename;
return false;
}
m_TextureCache[c_sTextureNames[i]] = uiHandle;
}
return true;
}
/*!****************************************************************************
@Function RenderSceneWithEffect
@Return bool true if no error occured
@Description Renders the whole scene with a single effect.
******************************************************************************/
bool OGLES3ShadowMapping::RenderSceneWithEffect(const int uiEffectId, const PVRTMat4 &mProjection, const PVRTMat4 &mView)
{
CPVRTPFXEffect *pEffect = m_ppPFXEffects[uiEffectId];
// Activate the passed effect
pEffect->Activate();
for (unsigned int i=0; i < m_Scene.nNumMeshNode; i++)
{
SPODNode* pNode = &m_Scene.pNode[i];
SPODMesh* pMesh = &m_Scene.pMesh[pNode->nIdx];
SPODMaterial *pMaterial = 0;
if (pNode->nIdxMaterial != -1)
{
pMaterial = &m_Scene.pMaterial[pNode->nIdxMaterial];
// Bind the texture if there is one bound to this object
if (pMaterial->nIdxTexDiffuse != -1)
{
CPVRTString texname = CPVRTString(m_Scene.pTexture[pMaterial->nIdxTexDiffuse].pszName).substitute(".png", "");
CPVRTStringHash hashedName(texname);
if (m_TextureCache.Exists(hashedName))
glBindTexture(GL_TEXTURE_2D, m_TextureCache[hashedName]);
}
}
glBindBuffer(GL_ARRAY_BUFFER, m_puiVbo[i]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_puiIndexVbo[i]);
// Pre-calculate commonly used matrices
PVRTMat4 mWorld;
m_Scene.GetWorldMatrix(mWorld, *pNode);
PVRTMat4 mWorldView = mView * mWorld;
// Bind semantics
const CPVRTArray<SPVRTPFXUniform>& Uniforms = pEffect->GetUniformArray();
for(unsigned int j = 0; j < Uniforms.GetSize(); ++j)
{
switch(Uniforms[j].nSemantic)
{
case ePVRTPFX_UsPOSITION:
{
glVertexAttribPointer(Uniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sVertex.nStride, pMesh->sVertex.pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsNORMAL:
{
glVertexAttribPointer(Uniforms[j].nLocation, 3, GL_FLOAT, GL_FALSE, pMesh->sNormals.nStride, pMesh->sNormals.pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsUV:
{
glVertexAttribPointer(Uniforms[j].nLocation, 2, GL_FLOAT, GL_FALSE, pMesh->psUVW[0].nStride, pMesh->psUVW[0].pData);
glEnableVertexAttribArray(Uniforms[j].nLocation);
}
break;
case ePVRTPFX_UsMATERIALCOLORDIFFUSE:
{
if (pMaterial)
glUniform4f(Uniforms[j].nLocation, pMaterial->pfMatDiffuse[0], pMaterial->pfMatDiffuse[1], pMaterial->pfMatDiffuse[2], 1.0f);
}
break;
case ePVRTPFX_UsWORLDVIEWPROJECTION:
{
PVRTMat4 mWorldViewProj = mProjection * mWorldView;
glUniformMatrix4fv(Uniforms[j].nLocation, 1, GL_FALSE, mWorldViewProj.f);
}
break;
case ePVRTPFX_UsWORLDI:
{
PVRTMat3 mWorldI3x3(mWorld.inverse());
glUniformMatrix3fv(Uniforms[j].nLocation, 1, GL_FALSE, mWorldI3x3.f);
}
break;
case ePVRTPFX_UsWORLDVIEWIT:
{
PVRTMat3 mWorldViewIT3x3(mWorldView.inverse().transpose());
glUniformMatrix3fv(Uniforms[j].nLocation, 1, GL_FALSE, mWorldViewIT3x3.f);
}
break;
case ePVRTPFX_UsTEXTURE:
{
// Set the sampler variable to the texture unit
glUniform1i(Uniforms[j].nLocation, Uniforms[j].nIdx);
}
break;
case ePVRTPFX_UsLIGHTPOSWORLD:
{
glUniform3fv(Uniforms[j].nLocation, 1, m_vLightPosition.ptr());
}
break;
case eCUSTOMSEMANTIC_SHADOWTRANSMATRIX:
{
// We need to calculate the texture projection matrix. This matrix takes the pixels from world space to previously rendered light projection space
//where we can look up values from our saved depth buffer. The matrix is constructed from the light view and projection matrices as used for the previous render and
//then multiplied by the inverse of the current view matrix.
//PVRTMat4 mTextureMatrix = m_mBiasMatrix * m_mLightProjection * m_mLightView * mView.inverse();
PVRTMat4 mTextureMatrix = m_mBiasMatrix * m_mLightProjection * m_mLightView * mWorld;
glUniformMatrix4fv(Uniforms[j].nLocation, 1, GL_FALSE, mTextureMatrix.f);
}
break;
case ePVRTPFX_UsRANDOM:
{
glUniform1f(Uniforms[j].nLocation, m_fBias);
}
break;
default:
{
PVRShellOutputDebug("Error: Unhandled semantic in RenderSceneWithEffect()\n");
return false;
}
}
}
// Now that all uniforms are set and the materials ready, draw the mesh.
glDrawElements(GL_TRIANGLES, pMesh->nNumFaces*3, GL_UNSIGNED_SHORT, 0);
// Disable all vertex attributes
for(unsigned int j = 0; j < Uniforms.GetSize(); ++j)
{
switch(Uniforms[j].nSemantic)
{
case ePVRTPFX_UsPOSITION:
case ePVRTPFX_UsNORMAL:
case ePVRTPFX_UsUV:
glDisableVertexAttribArray(Uniforms[j].nLocation);
break;
}
}
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
return true;
}
