darksylinc

Godot Shader System Proposal

Godot 4's current shader/PSO system assumes the following:

1. Specialization Constants reduce compilation time (true) but are not free.
2. Specialization Constants are well optimized by Driver (blatantly false on Android),
3. Uniform Static branches are free. They're very cheap but I am seeing incremental improvements when removed entirely via #ifdef. Sometimes major improvements.

Godot 4 wants these assumptions to be true because they help reduce the number of shader & PSO variants, which are key to reducing compilation stutter.

darksylinc

#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <algorithm>
#include <deque>

darksylinc

What this proposal is about

• Creating a Compositor that will handle rendering and compute
• Make ordering tasks around MUCH easier
• Fixing barrier problem

What this proposal isn't

• It's not about exposing the Compositor to the user

darksylinc

// Compiling this code with:
// fxc.exe /T ps_5_0 /O0 /E main broken_min16float.hlsl
// Will result in the following:
// error X8000: D3D11 Internal Compiler Error: Invalid Bytecode: Incompatible min precision type for operand #1 of opcode #6 (counts are 1-based). Expected int or uint.
//
// Works if compiled with Od for no optimizations

#define _h( x ) min16float( ( x ) )

cbuffer PassBuffer : register( b0 )

darksylinc

#!/bin/bash

OGRE_BRANCH_NAME="v2-1"

if test ! -d ogre-next-deps; then
	mkdir ogre-next-deps
	echo "--- Cloning ogre-next-deps ---"
	git clone --recurse-submodules --shallow-submodules https://github.com/OGRECave/ogre-next-deps || exit $?
else
	echo "--- ogre-next-deps repo detected. Cloning skipped ---"

darksylinc

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 2a4cd7d377bf..62c6934a6244 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -1215,6 +1215,33 @@ static const struct drm_prop_enum_list amdgpu_dither_enum_list[] =
 	{ AMDGPU_FMT_DITHER_ENABLE, "on" },
 };
 
+static const struct drm_prop_enum_list amdgpu_user_pixenc_list[] = {
+	{ 0, "auto" },