Halide 配置 visual studio

Halide 配置 visual studio
Halide是一种编程语言，使得在现代机器上编写高性能图像和数组处理代码更加容易。Halide支持如下的平台：

CPU体系结构：X86，ARM，MIPS，Hexagon，PowerPC

操作系统：Linux，Windows，macOS，Android，iOS，Qualcomm QuRT

GPU计算API：CUDA，OpenCL，OpenGL，OpenGL计算着色器，Apple Metal，Microsoft Direct X 12

Halide并不是独立的编程语言，而是嵌入在C ++中。这意味可以像编写c++代码一样编写halide代码。本文会介绍如何通过配置环境，在visual studio上可以跑Halide代码

1.一个视频介绍

https://halide-lang.org/cvpr2015.html
很好的博客介绍

2.halide下载

https://github.com/halide/Halide/releases
Windows下载x86-64的版本, 后面会在vs上进行配置

3.Test 代码，包含很多测试性能的例子

https://github.com/halide/Halide/tree/master/test

4.在windows visual studio 2022中配置 halide 14.0步骤

1）解压后的文件夹

2）配置环境变量

比如下面路径
D:\Halide-14.0.0-x86-64-windows\Halide-14.0.0-x86-64-windows\bin\Release

3）新建控制台应用，

在属性管理器中， release x64下新建halidePropertySheet属性页，后续配置完成这个属性页后，保存下来，再建立其他用到halide的时候直接复制该属性页就可以。

解决方案配置选择 release x64

复制https://halide-lang.org/docs/tutorial_2lesson_01_basics_8cpp-example.html中的代码用于验证。

// The only Halide header file you need is Halide.h. It includes all of Halide.
#include "Halide.h"// We'll also include stdio for printf.
#include <stdio.h>int main(int argc, char** argv) {// This program defines a single-stage imaging pipeline that// outputs a grayscale diagonal gradient.// A 'Func' object represents a pipeline stage. It's a pure// function that defines what value each pixel should have. You// can think of it as a computed image.Halide::Func gradient;// Var objects are names to use as variables in the definition of// a Func. They have no meaning by themselves.Halide::Var x, y;// We typically use Vars named 'x' and 'y' to correspond to the x// and y axes of an image, and we write them in that order. If// you're used to thinking of images as having rows and columns,// then x is the column index, and y is the row index.// Funcs are defined at any integer coordinate of its variables as// an Expr in terms of those variables and other functions.// Here, we'll define an Expr which has the value x + y. Vars have// appropriate operator overloading so that expressions like// 'x + y' become 'Expr' objects.Halide::Expr e = x + y;// Now we'll add a definition for the Func object. At pixel x, y,// the image will have the value of the Expr e. On the left hand// side we have the Func we're defining and some Vars. On the right// hand side we have some Expr object that uses those same Vars.gradient(x, y) = e;// This is the same as writing:////   gradient(x, y) = x + y;//// which is the more common form, but we are showing the// intermediate Expr here for completeness.// That line of code defined the Func, but it didn't actually// compute the output image yet. At this stage it's just Funcs,// Exprs, and Vars in memory, representing the structure of our// imaging pipeline. We're meta-programming. This C++ program is// constructing a Halide program in memory. Actually computing// pixel data comes next.// Now we 'realize' the Func, which JIT compiles some code that// implements the pipeline we've defined, and then runs it.  We// also need to tell Halide the domain over which to evaluate the// Func, which determines the range of x and y above, and the// resolution of the output image. Halide.h also provides a basic// templatized image type we can use. We'll make an 800 x 600// image.Halide::Buffer<int32_t> output = gradient.realize({ 800, 600 });// Halide does type inference for you. Var objects represent// 32-bit integers, so the Expr object 'x + y' also represents a// 32-bit integer, and so 'gradient' defines a 32-bit image, and// so we got a 32-bit signed integer image out when we call// 'realize'. Halide types and type-casting rules are equivalent// to C.// Let's check everything worked, and we got the output we were// expecting:for (int j = 0; j < output.height(); j++) {for (int i = 0; i < output.width(); i++) {// We can access a pixel of an Buffer object using similar// syntax to defining and using functions.if (output(i, j) != i + j) {printf("Something went wrong!\n""Pixel %d, %d was supposed to be %d, but instead it's %d\n",i, j, i + j, output(i, j));return -1;}}}// Everything worked! We defined a Func, then called 'realize' on// it to generate and run machine code that produced an Buffer.printf("Success!\n");return 0;
}

4）配置属性页

修改 c++语言标准为 c++ 17

链接器-常规-附加库目录

连接器-输入-附加依赖项

5）以上完成后保存属性页，点击运行程序，程序正常运行，表示配置正确，可以正常使用halide

5. 有用的资源

CSDN上的 halide编程技术指南

官网example

很好的博客介绍