feat(p_cube.hpp): add vertice & indice length

src/core/texture.cpp

@@ -0,0 +1,65 @@
+#include "texture.hpp"
+
+#include <filesystem>
+#include <iostream>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+namespace fs = std::filesystem;
+
+Texture::Texture(const std::string& filename)
+{
+  fs::path path = fs::absolute(fs::current_path() / "res" / filename);
+
+  int maxTextureSize;
+  glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
+
+  glGenTextures(1, &id);
+  glBindTexture(GL_TEXTURE_2D, id);
+
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+  int imgW, imgH, numColCh;
+  stbi_set_flip_vertically_on_load(true);
+  unsigned char* data =
+      stbi_load(path.string().c_str(), &imgW, &imgH, &numColCh, 0);
+
+  if (!data)
+  {
+    std::cerr << "Error loading image: " << path << std::endl;
+    return;
+  }
+
+  int loadedTextureSize = imgW * imgH;
+
+  if (loadedTextureSize >= maxTextureSize)
+  {
+    std::cerr << "Error: max texture size is " << maxTextureSize
+              << " pixels, but image size = " << loadedTextureSize << std::endl;
+    stbi_image_free(data);
+    return;
+  }
+
+  GLenum format = (numColCh == 4) ? GL_RGBA : GL_RGB;
+
+  glTexImage2D(GL_TEXTURE_2D, 0, format, imgW, imgH, 0, format,
+               GL_UNSIGNED_BYTE, data);
+  glGenerateMipmap(GL_TEXTURE_2D);
+
+  stbi_image_free(data);
+}
+
+Texture::~Texture() { glDeleteTextures(1, &id); }
+
+void Texture::bind(GLenum textureUnit) const
+{
+  glActiveTexture(textureUnit);
+  glBindTexture(GL_TEXTURE_2D, id);
+}
+
+unsigned int Texture::getID() const { return id; }