/// <summary>
/// Updates program object uniforms using data from GpuProgramParameters.
/// normally called by GLSLGpuProgram.BindParameters() just before rendering occurs.
/// </summary>
/// <param name="parameters">GPU Parameters to use to update the uniforms params.</param>
public void UpdateUniforms(GpuProgramParameters parameters)
{
for(int i = 0; i < uniformReferences.Count; i++) {
UniformReference uniformRef = (UniformReference)uniformReferences[i];
GpuProgramParameters.FloatConstantEntry currentFloatEntry = null;
GpuProgramParameters.IntConstantEntry currentIntEntry = null;
if(uniformRef.isFloat) {
currentFloatEntry = parameters.GetNamedFloatConstant(uniformRef.name);
if(currentFloatEntry != null) {
if(currentFloatEntry.isSet) {
switch(uniformRef.elementCount) {
case 1:
Gl.glUniform1fvARB(uniformRef.location, 1, currentFloatEntry.val);
break;
case 2:
Gl.glUniform2fvARB(uniformRef.location, 1, currentFloatEntry.val);
break;
case 3:
Gl.glUniform3fvARB(uniformRef.location, 1, currentFloatEntry.val);
break;
case 4:
Gl.glUniform4fvARB(uniformRef.location, 1, currentFloatEntry.val);
break;
} // end switch
}
}
}
else {
currentIntEntry = parameters.GetNamedIntConstant(uniformRef.name);
if(currentIntEntry != null) {
if(currentIntEntry.isSet) {
switch(uniformRef.elementCount) {
case 1:
Gl.glUniform1ivARB(uniformRef.location, 1, currentIntEntry.val);
break;
case 2:
Gl.glUniform2ivARB(uniformRef.location, 1, currentIntEntry.val);
break;
case 3:
Gl.glUniform3ivARB(uniformRef.location, 1, currentIntEntry.val);
break;
case 4:
Gl.glUniform4ivARB(uniformRef.location, 1, currentIntEntry.val);
break;
} // end switch
}
}
}
}
}
/// <summary>
/// Build uniform references from active named uniforms.
/// </summary>
private void BuildUniformReferences()
{
if(!uniformRefsBuilt) {
// scane through the active uniforms and add them to the reference list
int uniformCount;
int size = 0;
const int BufferSize = 100;
string uniformName;
// get the count of active uniforms
Gl.glGetObjectParameterivARB(glHandle, 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(int i = 0; i < uniformCount; i++) {
UniformReference newUniformReference = new UniformReference();
// get the info for the current uniform
System.Text.StringBuilder uniformNameBuilder = new System.Text.StringBuilder(BufferSize);
int test;
Gl.glGetActiveUniformARB(glHandle, i, BufferSize, out test, out size, out newUniformReference.type, uniformNameBuilder);
uniformName = uniformNameBuilder.ToString();
// don't add built in uniforms
newUniformReference.location = Gl.glGetUniformLocationARB(glHandle, uniformName);
if(newUniformReference.location >= 0) {
// user defined uniform found, add it to the reference list
newUniformReference.name = uniformName;
// decode uniform size and type
switch(newUniformReference.type) {
case Gl.GL_FLOAT:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 1;
break;
case Gl.GL_FLOAT_VEC2_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 2;
break;
case Gl.GL_FLOAT_VEC3_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 3;
break;
case Gl.GL_FLOAT_VEC4_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 4;
break;
case Gl.GL_INT:
case Gl.GL_SAMPLER_1D_ARB:
case Gl.GL_SAMPLER_2D_ARB:
case Gl.GL_SAMPLER_3D_ARB:
case Gl.GL_SAMPLER_CUBE_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 1;
break;
case Gl.GL_INT_VEC2_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 2;
break;
case Gl.GL_INT_VEC3_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 3;
break;
case Gl.GL_INT_VEC4_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 4;
break;
} // end switch
uniformReferences.Add(newUniformReference);
} // end if
} // end for
uniformRefsBuilt = true;
}
}
/// <summary>
/// Build uniform references from active named uniforms.
/// </summary>
private void BuildUniformReferences()
{
if(!uniformRefsBuilt) {
// scane through the active uniforms and add them to the reference list
int uniformCount;
int size = 0;
const int BufferSize = 100;
string uniformName;
// get the count of active uniforms
Gl.glGetObjectParameterivARB(glHandle, 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(int i = 0; i < uniformCount; i++) {
UniformReference newUniformReference = new UniformReference();
// get the info for the current uniform
System.Text.StringBuilder uniformNameBuilder = new System.Text.StringBuilder(BufferSize);
int test;
Gl.glGetActiveUniformARB(glHandle, i, BufferSize, out test, out size, out newUniformReference.type, uniformNameBuilder);
uniformName = uniformNameBuilder.ToString();
// don't add built in uniforms
newUniformReference.location = Gl.glGetUniformLocationARB(glHandle, uniformName);
if(newUniformReference.location >= 0) {
// user defined uniform found, add it to the reference list
newUniformReference.name = uniformName;
// decode uniform size and type
switch(newUniformReference.type) {
case Gl.GL_FLOAT:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 1;
break;
case Gl.GL_FLOAT_VEC2_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 2;
break;
case Gl.GL_FLOAT_VEC3_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 3;
break;
case Gl.GL_FLOAT_VEC4_ARB:
newUniformReference.isFloat = true;
newUniformReference.elementCount = 4;
break;
case Gl.GL_INT:
case Gl.GL_SAMPLER_1D_ARB:
case Gl.GL_SAMPLER_2D_ARB:
case Gl.GL_SAMPLER_3D_ARB:
case Gl.GL_SAMPLER_CUBE_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 1;
break;
case Gl.GL_INT_VEC2_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 2;
break;
case Gl.GL_INT_VEC3_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 3;
break;
case Gl.GL_INT_VEC4_ARB:
newUniformReference.isFloat = false;
newUniformReference.elementCount = 4;
break;
} // end switch
uniformReferences.Add(newUniformReference);
} // end if
} // end for
uniformRefsBuilt = true;
}
}
