//---------------------------------------------------------------------
void GLSLProgramManagerCommon::extractUniforms(GLuint programObject,
const GpuConstantDefinitionMap* vertexConstantDefs,
const GpuConstantDefinitionMap* geometryConstantDefs,
const GpuConstantDefinitionMap* fragmentConstantDefs,
const GpuConstantDefinitionMap* hullConstantDefs,
const GpuConstantDefinitionMap* domainConstantDefs,
const GpuConstantDefinitionMap* computeConstantDefs,
GLUniformReferenceList& list, GLUniformBufferList& sharedList)
{
// Scan through the active uniforms and add them to the reference list
GLint uniformCount = 0;
#define uniformLength 200
// GLint uniformLength = 0;
// glGetProgramiv(programObject, GL_ACTIVE_UNIFORM_MAX_LENGTH, &uniformLength);
char uniformName[uniformLength];
GLUniformReference newGLUniformReference;
// Get the number of active uniforms
OGRE_CHECK_GL_ERROR(glGetProgramiv(programObject, GL_ACTIVE_UNIFORMS, &uniformCount));
// Loop over each of the active uniforms, and add them to the reference container
// only do this for user defined uniforms, ignore built in gl state uniforms
for (int index = 0; index < uniformCount; index++)
{
GLint arraySize;
GLenum glType;
OGRE_CHECK_GL_ERROR(glGetActiveUniform(programObject, index, uniformLength, NULL,
&arraySize, &glType, uniformName));
// Don't add built in uniforms
OGRE_CHECK_GL_ERROR(newGLUniformReference.mLocation = glGetUniformLocation(programObject, uniformName));
if (newGLUniformReference.mLocation >= 0)
{
// User defined uniform found, add it to the reference list
String paramName = String( uniformName );
// Current ATI drivers (Catalyst 7.2 and earlier) and older NVidia drivers will include all array elements as uniforms but we only want the root array name and location
// Also note that ATI Catalyst 6.8 to 7.2 there is a bug with glUniform that does not allow you to update a uniform array past the first uniform array element
// ie you can't start updating an array starting at element 1, must always be element 0.
// If the uniform name has a "[" in it then its an array element uniform.
String::size_type arrayStart = paramName.find("[");
if (arrayStart != String::npos)
{
// if not the first array element then skip it and continue to the next uniform
if (paramName.compare(arrayStart, paramName.size() - 1, "[0]") != 0) continue;
paramName = paramName.substr(0, arrayStart);
}
// Find out which params object this comes from
bool foundSource = completeParamSource(paramName,
vertexConstantDefs, geometryConstantDefs,
fragmentConstantDefs, hullConstantDefs,
domainConstantDefs, computeConstantDefs, newGLUniformReference);
// Only add this parameter if we found the source
if (foundSource)
{
assert(size_t (arraySize) == newGLUniformReference.mConstantDef->arraySize
&& "GL doesn't agree with our array size!");
list.push_back(newGLUniformReference);
}
// Don't bother adding individual array params, they will be
// picked up in the 'parent' parameter can copied all at once
// anyway, individual indexes are only needed for lookup from
// user params
} // end if
} // end for
// Now deal with uniform blocks
GLint blockCount = 0;
OGRE_CHECK_GL_ERROR(glGetProgramiv(programObject, GL_ACTIVE_UNIFORM_BLOCKS, &blockCount));
for (int index = 0; index < blockCount; index++)
{
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockName(programObject, index, uniformLength, NULL, uniformName));
GpuSharedParametersPtr blockSharedParams = GpuProgramManager::getSingleton().getSharedParameters(uniformName);
GLint blockSize, blockBinding;
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockiv(programObject, index, GL_UNIFORM_BLOCK_DATA_SIZE, &blockSize));
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockiv(programObject, index, GL_UNIFORM_BLOCK_BINDING, &blockBinding));
HardwareUniformBufferSharedPtr newUniformBuffer = HardwareBufferManager::getSingleton().createUniformBuffer(blockSize, HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE, false, uniformName);
GL3PlusHardwareUniformBuffer* hwGlBuffer = static_cast<GL3PlusHardwareUniformBuffer*>(newUniformBuffer.get());
hwGlBuffer->setGLBufferBinding(blockBinding);
sharedList.push_back(newUniformBuffer);
}
}
//---------------------------------------------------------------------
void GLSLESProgramManagerCommon::extractUniforms(GLuint programObject,
const GpuConstantDefinitionMap* vertexConstantDefs,
const GpuConstantDefinitionMap* fragmentConstantDefs,
GLUniformReferenceList& list, GLUniformBufferList& sharedList)
{
// Scan through the active uniforms and add them to the reference list
GLint uniformCount = 0;
GLint maxLength = 0;
char* uniformName = NULL;
#define uniformLength 200
OGRE_CHECK_GL_ERROR(glGetProgramiv(programObject, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxLength));
// If the max length of active uniforms is 0, then there are 0 active.
// There won't be any to extract so we can return.
if(maxLength == 0)
return;
uniformName = new char[maxLength + 1];
GLUniformReference newGLUniformReference;
// Get the number of active uniforms
OGRE_CHECK_GL_ERROR(glGetProgramiv(programObject, GL_ACTIVE_UNIFORMS, &uniformCount));
// Loop over each of the active uniforms, and add them to the reference container
// only do this for user defined uniforms, ignore built in gl state uniforms
for (GLuint index = 0; index < (GLuint)uniformCount; index++)
{
GLint arraySize = 0;
GLenum glType = GL_NONE;
OGRE_CHECK_GL_ERROR(glGetActiveUniform(programObject, index, maxLength, NULL,
&arraySize, &glType, uniformName));
// Don't add built in uniforms
newGLUniformReference.mLocation = glGetUniformLocation(programObject, uniformName);
if (newGLUniformReference.mLocation >= 0)
{
// User defined uniform found, add it to the reference list
String paramName = String( uniformName );
// If the uniform name has a "[" in it then its an array element uniform.
String::size_type arrayStart = paramName.find("[");
if (arrayStart != String::npos)
{
// If not the first array element then skip it and continue to the next uniform
if (paramName.compare(arrayStart, paramName.size() - 1, "[0]") != 0) continue;
paramName = paramName.substr(0, arrayStart);
}
// Find out which params object this comes from
bool foundSource = completeParamSource(paramName,
vertexConstantDefs, fragmentConstantDefs, newGLUniformReference);
// Only add this parameter if we found the source
if (foundSource)
{
assert(size_t (arraySize) == newGLUniformReference.mConstantDef->arraySize
&& "GL doesn't agree with our array size!");
list.push_back(newGLUniformReference);
}
// Don't bother adding individual array params, they will be
// picked up in the 'parent' parameter can copied all at once
// anyway, individual indexes are only needed for lookup from
// user params
} // end if
} // end for
if( uniformName != NULL )
{
delete[] uniformName;
}
#if OGRE_NO_GLES3_SUPPORT == 0
// Now deal with uniform blocks
GLint blockCount = 0;
OGRE_CHECK_GL_ERROR(glGetProgramiv(programObject, GL_ACTIVE_UNIFORM_BLOCKS, &blockCount));
for (int index = 0; index < blockCount; index++)
{
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockName(programObject, index, uniformLength, NULL, uniformName));
GpuSharedParametersPtr blockSharedParams = GpuProgramManager::getSingleton().getSharedParameters(uniformName);
GLint blockSize, blockBinding;
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockiv(programObject, index, GL_UNIFORM_BLOCK_DATA_SIZE, &blockSize));
OGRE_CHECK_GL_ERROR(glGetActiveUniformBlockiv(programObject, index, GL_UNIFORM_BLOCK_BINDING, &blockBinding));
HardwareUniformBufferSharedPtr newUniformBuffer = HardwareBufferManager::getSingleton().createUniformBuffer(blockSize, HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE, false, uniformName);
GLES2HardwareUniformBuffer* hwGlBuffer = static_cast<GLES2HardwareUniformBuffer*>(newUniformBuffer.get());
hwGlBuffer->setGLBufferBinding(blockBinding);
sharedList.push_back(newUniformBuffer);
}
#endif
}