working on memoization

vis/include/util.hpp

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <glad/glad.h>
+
+#include <sstream>
+
+void utilShaderSource(GLuint shader, const std::vector<std::string> &sources) {
+    char const *ptrs[sources.size()];
+    for (size_t i = 0; i < sources.size(); ++i) {
+        ptrs[i] = sources[i].c_str();
+    }
+    glShaderSource(shader, sources.size(), ptrs, nullptr);
+}
+
+std::string utilShaderInfoLog(GLuint shader) {
+    int len;
+    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &len);
+    char buffer[len];
+    glGetShaderInfoLog(shader, len, nullptr, buffer);
+    return std::string(buffer);
+}
+
+std::string utilProgramInfoLog(GLuint program) {
+    int len;
+    glGetProgramiv(program, GL_INFO_LOG_LENGTH, &len);
+    char buffer[len];
+    glGetProgramInfoLog(program, len, nullptr, buffer);
+    return std::string(buffer);
+}
+
+std::string utilInfo() {
+    std::stringstream ss;
+    ss
+        << "Graphics Information:" << std::endl
+        << "    Vendor:          " << glGetString(GL_VENDOR) << std::endl
+        << "    Renderer:        " << glGetString(GL_RENDERER) << std::endl
+        << "    OpenGL version:  " << glGetString(GL_VERSION) << std::endl
+        << "    Shading version: " << glGetString(GL_SHADING_LANGUAGE_VERSION) << std::endl;
+    return ss.str();
+}