private void BindUniformBuffers(int ProgramHandle)
{
int FreeBinding = 0;
int BindUniformBuffersIfNotNull(ShaderStage Stage)
{
if (Stage != null)
{
foreach (ShaderDeclInfo DeclInfo in Stage.UniformUsage)
{
OGLStreamBuffer Buffer = GetConstBuffer(Stage.Type, DeclInfo.Cbuf);
GL.BindBufferBase(BufferRangeTarget.UniformBuffer, FreeBinding, Buffer.Handle);
FreeBinding++;
}
}
return(FreeBinding);
}
BindUniformBuffersIfNotNull(Current.Vertex);
BindUniformBuffersIfNotNull(Current.TessControl);
BindUniformBuffersIfNotNull(Current.TessEvaluation);
BindUniformBuffersIfNotNull(Current.Geometry);
BindUniformBuffersIfNotNull(Current.Fragment);
}
public OGLShader()
{
Stages = new ConcurrentDictionary <long, ShaderStage>();
Programs = new Dictionary <ShaderProgram, int>();
ConstBuffers = new OGLStreamBuffer[5][];
for (int i = 0; i < 5; i++)
{
ConstBuffers[i] = new OGLStreamBuffer[ConstBuffersPerStage];
}
}
public void SetConstBuffer(long Key, int Cbuf, int DataSize, IntPtr HostAddress)
{
if (Stages.TryGetValue(Key, out ShaderStage Stage))
{
foreach (ShaderDeclInfo DeclInfo in Stage.UniformUsage.Where(x => x.Cbuf == Cbuf))
{
OGLStreamBuffer Buffer = GetConstBuffer(Stage.Type, Cbuf);
int Size = Math.Min(DataSize, Buffer.Size);
Buffer.SetData(Size, HostAddress);
}
}
}
private OGLStreamBuffer GetConstBuffer(GalShaderType StageType, int Cbuf)
{
int StageIndex = (int)StageType;
OGLStreamBuffer Buffer = ConstBuffers[StageIndex][Cbuf];
if (Buffer == null)
{
//Allocate a maximum of 64 KiB
int Size = Math.Min(GL.GetInteger(GetPName.MaxUniformBlockSize), 64 * 1024);
Buffer = OGLStreamBuffer.Create(BufferTarget.UniformBuffer, Size);
ConstBuffers[StageIndex][Cbuf] = Buffer;
}
return(Buffer);
}
public void SetConstBuffer(long Key, int Cbuf, byte[] Data)
{
if (Stages.TryGetValue(Key, out ShaderStage Stage))
{
foreach (ShaderDeclInfo DeclInfo in Stage.UniformUsage.Where(x => x.Cbuf == Cbuf))
{
OGLStreamBuffer Buffer = GetConstBuffer(Stage.Type, Cbuf);
int Size = Math.Min(Data.Length, Buffer.Size);
byte[] Destiny = Buffer.Map(Size);
Array.Copy(Data, Destiny, Size);
Buffer.Unmap(Size);
}
}
}
private static void DeleteBuffer(OGLStreamBuffer Buffer)
{
Buffer.Dispose();
}
public void Create(long Key, long Size)
{
OGLStreamBuffer Buffer = new OGLStreamBuffer(BufferTarget.UniformBuffer, Size);
Cache.AddOrUpdate(Key, Buffer, Size);
}