public override void BindParameters(GpuProgramParameters parameters)
{
// activate the link program object
GLSLLinkProgram linkProgram = GLSLLinkProgramManager.Instance.ActiveLinkProgram;
// pass on parameters from params to program object uniforms
linkProgram.UpdateUniforms(parameters);
}
/// <summary>
/// Set the active vertex shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="vertexProgram"></param>
public void SetActiveVertexShader(GLSLGpuProgram vertexProgram)
{
if (vertexProgram != this.activeVertexProgram)
{
this.activeVertexProgram = vertexProgram;
// active link program is no longer valid
this.activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB(0);
}
}
/// <summary>
/// Set the active geometry shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="vertexProgram"></param>
public void SetActiveGeometryShader(GLSLGpuProgram geometryProgram)
{
if (geometryProgram != this.activeGeometryProgram)
{
this.activeGeometryProgram = geometryProgram;
// active link program is no longer valid
this.activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB(0);
}
}
/// <summary>
/// Set the active fragment shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="fragmentProgram"></param>
public void SetActiveFragmentShader(GLSLGpuProgram fragmentProgram)
{
if (fragmentProgram != this.activeFragmentProgram)
{
this.activeFragmentProgram = fragmentProgram;
// active link program is no longer valid
this.activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB(0);
}
}
public override void BindProgramParameters(GpuProgramParameters parms, GpuProgramParameters.GpuParamVariability mask)
{
try
{
// activate the link program object
GLSLLinkProgram linkProgram = GLSLLinkProgramManager.Instance.ActiveLinkProgram;
// pass on parameters from params to program object uniforms
linkProgram.UpdateUniforms(parms, mask, Type);
}
catch (Exception e)
{
LogManager.Instance.Write("Remove this when validated");
Debugger.Break();
}
}
/// <summary>
/// Set the active vertex shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="vertexProgram"></param>
public void SetActiveVertexShader(GLSLGpuProgram vertexProgram)
{
if(vertexProgram != activeVertexProgram) {
activeVertexProgram = vertexProgram;
// active link program is no longer valid
activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB(0);
}
}
/// <summary>
/// Set the active fragment shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="fragmentProgram"></param>
public void SetActiveFragmentShader(GLSLGpuProgram fragmentProgram)
{
if(fragmentProgram != activeFragmentProgram) {
activeFragmentProgram = fragmentProgram;
// active link program is no longer valid
activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB(0);
}
}
///<summary>
/// Populate a list of uniforms based on a program object.
///</summary>
///<param name="programObject">Handle to the program object to query</param>
///<param name="vertexConstantDefs">Definition of the constants extracted from the
/// vertex program, used to match up physical buffer indexes with program
/// uniforms. May be null if there is no vertex program.</param>
///<param name="geometryConstantDefs">Definition of the constants extracted from the
/// geometry program, used to match up physical buffer indexes with program
/// uniforms. May be null if there is no geometry program.</param>
///<param name="fragmentConstantDefs">Definition of the constants extracted from the
/// fragment program, used to match up physical buffer indexes with program
/// uniforms. May be null if there is no fragment program.</param>
///<param name="list">The list to populate (will not be cleared before adding, clear
/// it yourself before calling this if that's what you want).</param>
public void ExtractUniforms(int programObject,
GpuProgramParameters.GpuConstantDefinitionMap vertexConstantDefs,
GpuProgramParameters.GpuConstantDefinitionMap geometryConstantDefs,
GpuProgramParameters.GpuConstantDefinitionMap fragmentConstantDefs,
GLSLLinkProgram.UniformReferenceList list)
{
// scan through the active uniforms and add them to the reference list
// get the number of active uniforms
int uniformCount;
const int BUFFERSIZE = 200;
Gl.glGetObjectParameterivARB(programObject, Gl.GL_OBJECT_ACTIVE_UNIFORMS_ARB,
out 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 (var index = 0; index < uniformCount; index++)
{
// important for Axiom: dont pull this var to the outer scope
// because UniformReference is by value (class)
// if we'd share the instance we would push the same instance
// to the result list each iteration
var newGLUniformReference = new GLSLLinkProgram.UniformReference();
var uniformName = new StringBuilder();
int arraySize;
int glType;
Gl.glGetActiveUniformARB(programObject, index, BUFFERSIZE, null,
out arraySize, out glType, uniformName);
newGLUniformReference.Location = Gl.glGetUniformLocationARB(programObject, uniformName.ToString());
if (newGLUniformReference.Location >= 0)
{
// user defined uniform found, add it to the reference list
var paramName = uniformName.ToString();
// currant 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.
var arrayStart = paramName.IndexOf( '[' );
if (arrayStart != -1)
{
// if not the first array element then skip it and continue to the next uniform
if (paramName.Substring(arrayStart, paramName.Length - 1) != "[0]")
continue;
paramName = paramName.Substring(0, arrayStart);
}
// find out which params object this comes from
var foundSource = CompleteParamSource( paramName, vertexConstantDefs, geometryConstantDefs,
fragmentConstantDefs, newGLUniformReference );
// only add this parameter if we found the source
if (foundSource)
{
Debug.Assert( arraySize == newGLUniformReference.ConstantDef.ArraySize,
"GL doesn't agree with our array size!" );
list.Add(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
}
private bool CompleteParamSource(String paramName,
GpuProgramParameters.GpuConstantDefinitionMap vertexConstantDefs,
GpuProgramParameters.GpuConstantDefinitionMap geometryConstantDefs,
GpuProgramParameters.GpuConstantDefinitionMap fragmentConstantDefs,
GLSLLinkProgram.UniformReference refToUpdate)
{
GpuProgramParameters.GpuConstantDefinition parami;
if (vertexConstantDefs != null)
{
if ( vertexConstantDefs.TryGetValue( paramName, out parami ) )
{
refToUpdate.SourceProgType = GpuProgramType.Vertex;
refToUpdate.ConstantDef = parami;
return true;
}
}
if (geometryConstantDefs != null)
{
if (geometryConstantDefs.TryGetValue(paramName, out parami))
{
refToUpdate.SourceProgType = GpuProgramType.Geometry;
refToUpdate.ConstantDef = parami;
return true;
}
}
if (fragmentConstantDefs != null)
{
if (fragmentConstantDefs.TryGetValue(paramName, out parami))
{
refToUpdate.SourceProgType = GpuProgramType.Fragment;
refToUpdate.ConstantDef = parami;
return true;
}
}
return false;
}
/// <summary>
/// Set the active geometry shader for the next rendering state.
/// </summary>
/// <remarks>
/// The active program object will be cleared.
/// Normally called from the GLSLGpuProgram.BindProgram and UnbindProgram methods
/// </remarks>
/// <param name="vertexProgram"></param>
public void SetActiveGeometryShader( GLSLGpuProgram geometryProgram )
{
if (geometryProgram != activeGeometryProgram)
{
activeGeometryProgram = geometryProgram;
// active link program is no longer valid
activeLinkProgram = null;
// change back to fixed pipeline
Gl.glUseProgramObjectARB( 0 );
}
}