Add structure array multiplication example

Signed-off-by: Brian Petkovsek <[email protected]>

examples/structure_array_multiplication/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+project(kompute_array_mult)
+include(CMakePrintHelpers)
+
+set(CMAKE_CXX_STANDARD 14)
+
+# Options
+option(KOMPUTE_OPT_GIT_TAG "The tag of the repo to use for the example" "master")
+option(KOMPUTE_OPT_FROM_SOURCE "Whether to build example from source or from git fetch repo" 0)
+# Set a default build type if none was specified
+# Based on: https://github.com/openchemistry/tomviz/blob/master/cmake/BuildType.cmake
+set(DEFAULT_BUILD_TYPE "Release")
+
+if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    set(DEFAULT_BUILD_TYPE "Debug")
+endif()
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    message(STATUS "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified.")
+    set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE STRING "Choose the type of build." FORCE)
+
+    # Set the possible values of build type for cmake-gui
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+
+if(WIN32) # Install dlls in the same directory as the executable on Windows
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+endif()
+
+if(KOMPUTE_OPT_FROM_SOURCE)
+    add_subdirectory(../../ ${CMAKE_CURRENT_BINARY_DIR}/kompute_build)
+else()
+    include(FetchContent)
+    FetchContent_Declare(kompute GIT_REPOSITORY https://github.com/KomputeProject/kompute.git
+        GIT_TAG ${KOMPUTE_OPT_GIT_TAG})
+    FetchContent_MakeAvailable(kompute)
+    include_directories(${kompute_SOURCE_DIR}/src/include)
+endif()
+
+# Add to the list, so CMake can later find the code to compile shaders to header files
+list(APPEND CMAKE_PREFIX_PATH "${kompute_SOURCE_DIR}/cmake")
+
+add_subdirectory(src/shaders) 
+add_subdirectory(src)

examples/structure_array_multiplication/README.md

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+# Kompute Structure Array Multiplication Example
+
+This folder contains an Kompute Example demonstrating how to use structs between c++ and shaders. 
+
+## Building the example
+
+You will notice that it's a standalone project, so you can re-use it for your application.
+It uses CMake's [`fetch_content`](https://cmake.org/cmake/help/latest/module/FetchContent.html) to consume Kompute as a dependency.
+To build you just need to run the CMake command in this folder as follows:
+
+```bash
+git clone https://github.com/KomputeProject/kompute.git
+cd kompute/examples/structure_array_multiplication
+mkdir build
+cd build
+cmake ..
+cmake --build .
+```
+
+## Executing
+
+Form inside the `build/` directory run:
+
+### Linux
+
+```bash
+./kompute_array_mult
+```
+
+### Windows
+
+```bash
+.\Debug\kompute_array_mult.exe
+```
+
+## Pre-requisites
+
+In order to run this example, you will need the following dependencies:
+
+* REQUIRED
+    + The Vulkan SDK must be installed
+
+For the Vulkan SDK, the simplest way to install it is through [their website](https://vulkan.lunarg.com/sdk/home). You just have to follow the instructions for the relevant platform.

examples/structure_array_multiplication/src/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+
+add_executable(kompute_array_mult main.cpp)
+target_link_libraries(kompute_array_mult PRIVATE shaders kompute::kompute)

examples/structure_array_multiplication/src/main.cpp

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+
+#include <iostream>
+#include <memory>
+#include <vector>
+
+#include "SHADER_Mult1.hpp"
+#include <kompute/Kompute.hpp> 
+#include "shaders/structs/ExampleStructure2.hpp"
+
+int main()
+{
+    kp::Manager mgr; 
+
+    ExampleStructure2 a{ 1,2,3,4,5,6,7,8,9,10, {11,12,13,14,15,16,17,18,19,20} };
+    ExampleStructure2 b{ 1,2,3,4,5,6,7,8,9,10, {11,12,13,14,15,16,17,18,19,20} };
+    ExampleStructure2 c{ 0 };
+
+    std::shared_ptr<kp::TensorT<ExampleStructure2>> tensorInA =
+      mgr.tensorT<ExampleStructure2>({ a, b });
+    std::shared_ptr<kp::TensorT<ExampleStructure2>> tensorInB =
+      mgr.tensorT<ExampleStructure2>({ b, a });
+    std::shared_ptr<kp::TensorT<ExampleStructure2>> tensorOut =
+      mgr.tensorT<ExampleStructure2>({ c, c });
+
+    const std::vector<std::shared_ptr<kp::Tensor>> params = { tensorInA,
+                                                              tensorInB,
+                                                              tensorOut };
+
+    const std::vector<uint32_t> shader = std::vector<uint32_t>(
+        shaders::SHADER_MULT1_COMP_SPV.begin(), shaders::SHADER_MULT1_COMP_SPV.end());
+    std::shared_ptr<kp::Algorithm> algo = mgr.algorithm(params, shader);
+
+    mgr.sequence()
+      ->record<kp::OpTensorSyncDevice>(params)
+      ->record<kp::OpAlgoDispatch>(algo)
+      ->record<kp::OpTensorSyncLocal>(params)
+      ->eval();
+
+    // prints "Output {  0  4  12  }"
+    std::cout << "Output: {  " << std::endl;
+    int i = 0;
+    for (const ExampleStructure2& elem : tensorOut->vector()) {
+        std::cout << "Elm " << i++ << ": ";
+        std::cout << elem.a << "  ";
+        std::cout << elem.b << "  ";
+        std::cout << elem.c << "  ";
+        std::cout << elem.d << "  ";
+        std::cout << elem.e << "  ";
+        std::cout << elem.f << "  ";
+        std::cout << elem.g << "  ";
+        std::cout << elem.h << "  ";
+        std::cout << elem.i << "  ";
+        std::cout << elem.j << "  ";
+
+        std::cout << "{" << "  ";
+
+        std::cout << elem.k.a << "  ";
+        std::cout << elem.k.b << "  ";
+        std::cout << elem.k.c << "  ";
+        std::cout << elem.k.d << "  ";
+        std::cout << elem.k.e << "  ";
+        std::cout << elem.k.f << "  ";
+        std::cout << elem.k.g << "  ";
+        std::cout << elem.k.h << "  ";
+        std::cout << elem.k.i << "  ";
+        std::cout << elem.k.j << "  ";
+
+        std::cout << "} " << std::endl;
+    }
+    std::cout << "}" << std::endl;
+}

examples/structure_array_multiplication/src/shaders/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+
+file(GLOB SHADERS *.comp)
+foreach(SHADER ${SHADERS})
+    get_filename_component(SHADER_NAME ${SHADER} NAME_WE)
+    set(OUTPUT_FILE_NO_EXT ${CMAKE_CURRENT_BINARY_DIR}/${SHADER_NAME})
+
+    vulkan_compile_shader(INFILE ${SHADER_NAME}.comp
+    OUTFILE ${SHADER_NAME}.hpp
+    NAMESPACE "shaders"
+    RELATIVE_PATH "${kompute_SOURCE_DIR}/cmake")
+
+
+    list(APPEND SHADER_OUTPUTS ${OUTPUT_FILE_NO_EXT}.hpp) 
+endforeach()
+
+add_library(shaders INTERFACE  ${SHADER_OUTPUTS})
+target_include_directories(shaders INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)

examples/structure_array_multiplication/src/shaders/SHADER_Mult1.comp

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+#version 450
+#extension GL_GOOGLE_include_directive : require
+#include "structs/ExampleStructure2.hpp"
+
+layout (local_size_x = 1) in;
+
+layout (std430, binding = 0) buffer bufA {
+    ExampleStructure2 A[];
+};
+
+layout (std430, binding = 1) buffer bufB {
+    ExampleStructure2 B[];
+};
+
+layout (std430, binding = 2) buffer bufOut {
+    ExampleStructure2 Out[];
+};
+
+void main() {
+    uint id = gl_GlobalInvocationID.x;
+
+    //example structure2
+    Out[id].a = A[id].a * B[id].a;
+    Out[id].b = A[id].b * B[id].b;
+    Out[id].c = A[id].c * B[id].c;
+    Out[id].d = A[id].d * B[id].d;
+    Out[id].e = A[id].e * B[id].e;
+    Out[id].f = A[id].f * B[id].f;
+    Out[id].g = A[id].g * B[id].g;
+    Out[id].h = A[id].h * B[id].h;
+    Out[id].i = A[id].i * B[id].i;
+    Out[id].j = A[id].j * B[id].j;
+
+    //example structure1(nested struct)
+    Out[id].k.a = A[id].k.a * B[id].k.a;
+    Out[id].k.b = A[id].k.b * B[id].k.b;
+    Out[id].k.c = A[id].k.c * B[id].k.c;
+    Out[id].k.d = A[id].k.d * B[id].k.d;
+    Out[id].k.e = A[id].k.e * B[id].k.e;
+    Out[id].k.f = A[id].k.f * B[id].k.f;
+    Out[id].k.g = A[id].k.g * B[id].k.g;
+    Out[id].k.h = A[id].k.h * B[id].k.h;
+    Out[id].k.i = A[id].k.i * B[id].k.i;
+    Out[id].k.j = A[id].k.j * B[id].k.j;
+}

examples/structure_array_multiplication/src/shaders/structs/ExampleStructure1.hpp

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+#ifndef EXAMPLE_STRUCTURE_1_HPP
+#define EXAMPLE_STRUCTURE_1_HPP
+
+#if defined(__clang__) || defined(_MSC_VER) || defined(__ICC) || defined(__INTEL_COMPILER) || defined(__GNUC__) || defined(__GNUG__)
+//c++ compiler
+#else
+//shader comipler
+#extension GL_GOOGLE_include_directive : require
+#endif
+
+#include "StructTemplate.hpp"
+
+struct ExampleStructure1
+{
+    int8_t    a;
+    int16_t   b;
+    int32_t   c;
+    int64_t   d;
+
+    uint8_t   e;
+    uint16_t  f;
+    uint32_t  g;
+    uint64_t  h;
+
+    float32_t i;
+    float64_t j;
+};
+#endif

examples/structure_array_multiplication/src/shaders/structs/ExampleStructure2.hpp

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+#ifndef EXAMPLE_STRUCTURE_2_HPP
+#define EXAMPLE_STRUCTURE_2_HPP
+
+#if defined(__clang__) || defined(_MSC_VER) || defined(__ICC) || defined(__INTEL_COMPILER) || defined(__GNUC__) || defined(__GNUG__)
+//c++ compiler
+#else
+//shader comipler
+#extension GL_GOOGLE_include_directive : require
+#endif
+
+#include "StructTemplate.hpp"
+#include "ExampleStructure1.hpp"
+
+struct ExampleStructure2
+{
+    int8_t    a;
+    int16_t   b;
+    int32_t   c;
+    int64_t   d;
+
+    uint8_t   e;
+    uint16_t  f;
+    uint32_t  g;
+    uint64_t  h;
+
+    float32_t i;
+    float64_t j;
+    ExampleStructure1 k;
+};
+#endif
+

examples/structure_array_multiplication/src/shaders/structs/StructTemplate.hpp

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+#if defined(__clang__) || defined(_MSC_VER) || defined(__ICC) || defined(__INTEL_COMPILER) || defined(__GNUC__) || defined(__GNUG__)
+//c++ compiler
+typedef signed char        int8_t;
+typedef short              int16_t;
+typedef int                int32_t;
+typedef long long          int64_t;
+
+typedef unsigned char      uint8_t;
+typedef unsigned short     uint16_t;
+typedef unsigned int       uint32_t;
+typedef unsigned long long uint64_t;
+
+typedef float float32_t;
+typedef double float64_t;
+#else
+//shader comipler
+#extension GL_EXT_shader_explicit_arithmetic_types_int8    : require
+#extension GL_EXT_shader_explicit_arithmetic_types_int16   : require
+#extension GL_EXT_shader_explicit_arithmetic_types_int32   : require
+#extension GL_EXT_shader_explicit_arithmetic_types_int64   : require
+
+#extension GL_EXT_shader_explicit_arithmetic_types_float32 : require
+#extension GL_EXT_shader_explicit_arithmetic_types_float64 : require
+#endif