palladium/backends/include/gfx_opengl.hpp

#pragma once

#include <pd/drivers/gfx.hpp>

namespace PD {
struct GfxOpenGLConfig {
  // Vertex Allocator
  template <typename T>
  using VertexAlloc = std::allocator<T>;
  // Index Allocator
  template <typename T>
  using IndexAlloc = std::allocator<T>;
  using IndexType = u32;  // Index Type

  static constexpr size_t NumVertices = 32768;  // 8192*4
  static constexpr size_t NumIndices = 49152;   // 8192*6
};
class GfxOpenGL : public GfxDriverBase<GfxOpenGLConfig> {
 public:
  GfxOpenGL(): GfxDriverBase("OpenGL2") {}
  ~GfxOpenGL() {}

  void SysInit() override;
  void SysDeinit() override;
  void Submit(size_t count, size_t start) override;
  void BindTexture(TextureID id) override;
  void SysReset() override;
  TextureID LoadTexture(const std::vector<PD::u8>& pixels, int w, int h,
                        TextureFormat type = TextureFormat::RGBA32,
                        TextureFilter filter = TextureFilter::Linear) override;
  void DeleteTexture(const TextureID& tex) override;

 private:
  void pSetupShaderAttribs(u32 shader);
  u32 pShader = 0;
  u32 VBO = 0;
  u32 IBO = 0;
  int pLocTex = 0;
  int pLocAlfa = 0;
  int pLocProjection = 0;
};
}  // namespace PD