Add backends

- Renamed GfxOpenGL to GfxOPenGL2
- Added GfxOpenGL3 backend for OpenGL 3.3+
- Added WIP DirectX9 backend
- Added structure for Citro3D
- Added linear Allocator

backends/source/gl-helper.cpp

@@ -0,0 +1,46 @@
+#include <glad/glad.h>
+
+#include <iostream>
+#include <pd_system/gl-helper.hpp>
+
+namespace PD {
+GLuint compileShader(const char* src, GLenum type) {
+  GLuint shader = glCreateShader(type);
+  glShaderSource(shader, 1, &src, nullptr);
+  glCompileShader(shader);
+
+  GLint success;
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+  if (!success) {
+    char infoLog[512];
+    glGetShaderInfoLog(shader, 512, nullptr, infoLog);
+    std::cerr << "Shader Compilation Error: " << infoLog << std::endl;
+  }
+
+  return shader;
+}
+u32 CreateShaderProgram(const char* vert, const char* frag) {
+  GLuint vertexShader = compileShader(vert, GL_VERTEX_SHADER);
+  GLuint fragmentShader = compileShader(frag, GL_FRAGMENT_SHADER);
+
+  GLuint shaderProgram = glCreateProgram();
+  glAttachShader(shaderProgram, vertexShader);
+  glAttachShader(shaderProgram, fragmentShader);
+  glLinkProgram(shaderProgram);
+
+  GLint success;
+  glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+  if (!success) {
+    char infoLog[512];
+    glGetProgramInfoLog(shaderProgram, 512, nullptr, infoLog);
+    std::cerr << "Shader Program Linking Error: " << infoLog << std::endl;
+  }
+
+  glDeleteShader(vertexShader);
+  glDeleteShader(fragmentShader);
+
+  if (success) PDLOG("Shader [{}] compiled sucessfully", shaderProgram);
+
+  return shaderProgram;
+}
+}  // namespace PD