/// <summary>
/// Apply this state to a shader program.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used to share common state between shaders.
/// </param>
/// <param name="shaderProgram">
/// A <see cref="ShaderProgram"/> that specify this uniform state.
/// </param>
/// <param name="uniformScope">
/// A <see cref="String"/> that specify the scope the uniform variable.
/// </param>
private void ApplyState(GraphicsContext ctx, ShaderProgram shaderProgram, string uniformScope)
{
if (shaderProgram == null)
{
throw new ArgumentNullException("shaderProgram");
}
GraphicsResource.CheckCurrentContext(ctx);
if (UniformBlockTag != null && UniformBuffer != null && shaderProgram.IsActiveUniformBlock(UniformBlockTag))
{
// Update uniform buffer
UniformBuffer.Map(ctx, BufferAccess.WriteOnly);
try {
ApplyState(ctx, UniformBuffer, null, UniformState.Values, this);
} finally {
UniformBuffer.Unmap(ctx);
}
// All uniforms at once
shaderProgram.SetUniformBlock(ctx, UniformBlockTag, UniformBuffer);
}
else
{
ApplyState(ctx, shaderProgram, null, UniformState.Values, this);
}
}