First pass for rewriting the build system

* Refactored all CMake files
* Started working on compiling shaders to header files in CMake

Signed-off-by: Fabian Sauter <sauter.fabian@mailbox.org>

test/shaders/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+#######################
+cmake_minimum_required(VERSION 3.15)
+
+add_library(test_shaders "Utils.cpp"
+                         "Utils.hpp")
+
+add_subdirectory(glsl)

test/shaders/Utils.cpp

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#include "Utils.hpp"
+#include <cstdint>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+
+std::vector<uint32_t>
+compileSource(const std::string& source)
+{
+    std::ofstream fileOut("tmp_kp_shader.comp");
+    fileOut << source;
+    fileOut.close();
+    if (system(
+          std::string(
+            "glslangValidator -V tmp_kp_shader.comp -o tmp_kp_shader.comp.spv")
+            .c_str())) {
+        throw std::runtime_error("Error running glslangValidator command");
+    }
+    std::ifstream fileStream("tmp_kp_shader.comp.spv", std::ios::binary);
+    std::vector<char> buffer;
+    buffer.insert(
+      buffer.begin(), std::istreambuf_iterator<char>(fileStream), {});
+    return { reinterpret_cast<uint32_t*>(buffer.data()),
+             reinterpret_cast<uint32_t*>(buffer.data() + buffer.size()) };
+}

test/shaders/Utils.hpp

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+/**
+ * Compile a single glslang source from string value. This is only meant
+ * to be used for testing as it's non threadsafe, and it had to be removed
+ * from the glslang dependency and now can only run the CLI directly due to
+ * license issues: see https://github.com/KomputeProject/kompute/pull/235
+ *
+ * @param source An individual raw glsl shader in string format
+ * @return The compiled SPIR-V binary in unsigned int32 format
+ */
+std::vector<uint32_t>
+compileSource(const std::string& source);

test/shaders/glsl/CMakeLists.txt

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: Apache-2.0
+#######################
+cmake_minimum_required(VERSION 3.15)
+
+vulkan_compile_shader(INFILE test_logistic_regression.comp
+                      OUTFILE test_logistic_regression.hpp
+                      NAMESPACE "kp")
+
+vulkan_compile_shader(INFILE test_op_custom_shader.comp
+                      OUTFILE test_op_custom_shader.hpp
+                      NAMESPACE "kp")
+
+vulkan_compile_shader(INFILE test_workgroup.comp
+                      OUTFILE test_workgroup.hpp
+                      NAMESPACE "kp")
+
+add_library(test_shaders_glsl "${CMAKE_CURRENT_BINARY_DIR}/test_logistic_regression.hpp"
+                              "${CMAKE_CURRENT_BINARY_DIR}/test_op_custom_shader.hpp"
+                              "${CMAKE_CURRENT_BINARY_DIR}/test_workgroup.hpp")
+
+set_target_properties(test_shaders_glsl PROPERTIES LINKER_LANGUAGE CXX)
+target_include_directories(test_shaders_glsl PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)