protected ShaderBase(string source_name, int group_size_x, int group_size_y, int group_size_z)
{
if (max_group_invocations == -1)
{
max_group_invocations = MyGL.CheckError(() => GL.GetInteger((GetPName)All.MaxComputeWorkGroupInvocations));
Print("max_group_invocations:", max_group_invocations);
(int, int, int)res;
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupSize, 0, out res.Item1);
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupSize, 1, out res.Item2);
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupSize, 2, out res.Item3);
(max_group_size_x, max_group_size_y, max_group_size_z) = res;
Print("max_group_size:", max_group_size_x, max_group_size_y, max_group_size_z);
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupCount, 0, out res.Item1);
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupCount, 1, out res.Item2);
GL.GetInteger((GetIndexedPName)All.MaxComputeWorkGroupCount, 2, out res.Item3);
(max_group_count_x, max_group_count_y, max_group_count_z) = res;
Print("max_group_count:", max_group_count_x, max_group_count_y, max_group_count_z);
}
Assert(group_size_x <= max_group_size_x && group_size_y <= max_group_size_y && group_size_z <= max_group_size_z);
Assert(group_size_x * group_size_y * group_size_z <= max_group_invocations);
(this.group_size_x, this.group_size_y, this.group_size_z) = (group_size_x, group_size_y, group_size_z);
if (!program_pool.TryGetValue((source_name, group_size_x, group_size_y, group_size_z), out program))
{
string source = IO.ReadResource(source_name);
// inject code
var lines = source.Split('\n').ToList();
lines[0] = "#version 450";
lines.Insert(1, $"layout(local_size_x = {group_size_x}, local_size_y = {group_size_y}, local_size_z = {group_size_z}) in;");
source = string.Join("\n", lines);
program = new MyGL.Program(
new MyGL.Shader(ShaderType.ComputeShader, source));
program_pool.Add((source_name, group_size_x, group_size_y, group_size_z), program);
}
}
public GameWindow()
// set window resolution, title, and default behaviour
: base(1280, 720, GraphicsMode.Default, "OpenTK Intro",
GameWindowFlags.Default, DisplayDevice.Default,
// ask for an OpenGL 3.0 forward compatible context
3, 0, GraphicsContextFlags.ForwardCompatible)
{
Console.WriteLine("gl version: " + GL.GetString(StringName.Version));
texture_program = new MyGL.Program(
new MyGL.Shader(ShaderType.VertexShader, IO.ReadResource("SIFT.shaders.example_vertex_shader.glsl")),
new MyGL.Shader(ShaderType.FragmentShader, IO.ReadResource("SIFT.shaders.example_fragment_shader.glsl")));
InitFBO();
CreateVertexArrayObject();
Canvas = new GPUImage(this.Width, this.Height);
}