Erich Ocean erichocean

Just a small gist to show how you can easily create a Rust shared lib, wrap it with C and call it from PostgreSQL SQL Command.

Prereq : Tested on Ubuntu 18, GCC, postgresql-server-11, postgresql-dev-11, rustlang
Create new project Cargo embed and cd embed
Rename the file src/main.rs to lib.rs
Add following code

#[no_mangle]
pub extern fn double_input(input: i32) -> i32 {
    input * 2

Results of Skia's nanobench for each of available configs.

The RPi4 board was using default clocks and was provided adequate power and cooling. The tests were conducted on fully-updated Raspbian Buster.

I'd love to test with RPi3B and RPi3B+ that I have, but my charger and PSU seem to be too weak, as both boards report "under voltage" condition.

This is an initial attempt at supporting animations in cljfx. Running instructions are below.

The actual animation logic is here under the Demo comment.

The original code is here.

	static const float3x3 lrgb2cone = {
	0.412165612, 0.211859107, 0.0883097947,
	0.536275208, 0.6807189584, 0.2818474174,
	0.0514575653, 0.107406579, 0.6302613616,
	};

	static const float3x3 cone2lab = {
	+0.2104542553, +1.9779984951, +0.0259040371,
	+0.7936177850, -2.4285922050, +0.7827717662,
	+0.0040720468, +0.4505937099, -0.8086757660,

	// Length-segregated string tables for length < 16. You use a separate overflow table for length >= 16.
	// By segregating like this you can pack the string data in the table itself tightly without any padding. The datapath
	// is uniform and efficient for all lengths < 16 by using unaligned 16-byte SIMD loads/compares and masking off the length prefix.

	// One of the benefits of packing string data tightly for each length table is that you can afford to reduce the load factor
	// on shorter length tables without hurting space utilization too much. This can push hole-in-one rates into the 95% range without
	// too much of a negative impact on cache utilization.

	// Since get() takes a vector register as an argument with the key, you want to shape the upstream code so the string to be queried
	// is naturally in a vector. For example, in an optimized identifier lexer you should already have a SIMD fast path for length < 16

	#pragma use_dxc //enable SM 6.0 features, in Unity this is only supported on version 2020.2.0a8 or later with D3D12 enabled
	#pragma kernel CountTotalsInBlock
	#pragma kernel BlockCountPostfixSum
	#pragma kernel CalculateOffsetsForEachKey
	#pragma kernel FinalSort

	uint _FirstBitToSort;
	int _NumElements;
	int _NumBlocks;
	bool _ShouldSortPayload;

	Shader "Hidden/JumpFloodOutline"
	{
	Properties
	{
	_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
	Tags { "PreviewType" = "Plane" }
	Cull Off ZWrite Off ZTest Always

	import numpy as np

	# Formula from: http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
	def rgb_to_xyz(r, g, b, w):
	xyz_r = np.array([r[0] / r[1], 1, (1 - r[0] - r[1]) / r[1]])
	xyz_g = np.array([g[0] / g[1], 1, (1 - g[0] - g[1]) / g[1]])
	xyz_b = np.array([b[0] / b[1], 1, (1 - b[0] - b[1]) / b[1]])
	xyz_w = np.array([w[0] / w[1], 1, (1 - w[0] - w[1]) / w[1]])

	s = xyz_w * np.linalg.inv(np.matrix([xyz_r, xyz_g, xyz_b]))

	################################################################
	#
	# h's hacky Houdini --> Fusion camera animation exporter
	#
	# Last mod: 20/3/2020 / [email protected]
	#
	#
	#
	#
	# Notes:

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