aurora/lib/gfx/texture.hpp

#pragma once
#include <dolphin/gx.h>

#include "common.hpp"

namespace aurora::gfx {
struct TextureUpload {
  wgpu::TextureDataLayout layout;
  wgpu::ImageCopyTexture tex;
  wgpu::Extent3D size;

  TextureUpload(wgpu::TextureDataLayout layout, wgpu::ImageCopyTexture tex, wgpu::Extent3D size) noexcept
  : layout(layout), tex(tex), size(size) {}
};
extern std::vector<TextureUpload> g_textureUploads;

constexpr u32 InvalidTextureFormat = -1;
struct TextureRef {
  wgpu::Texture texture;
  wgpu::TextureView view;
  wgpu::Extent3D size;
  wgpu::TextureFormat format;
  uint32_t mipCount;
  u32 gxFormat;
  bool isRenderTexture; // :shrug: for now

  TextureRef(wgpu::Texture texture, wgpu::TextureView view, wgpu::Extent3D size, wgpu::TextureFormat format,
             uint32_t mipCount, u32 gxFormat, bool isRenderTexture)
  : texture(std::move(texture))
  , view(std::move(view))
  , size(size)
  , format(format)
  , mipCount(mipCount)
  , gxFormat(gxFormat)
  , isRenderTexture(isRenderTexture) {}
};

TextureHandle new_static_texture_2d(uint32_t width, uint32_t height, uint32_t mips, u32 format, ArrayRef<uint8_t> data,
                                    const char* label) noexcept;
TextureHandle new_dynamic_texture_2d(uint32_t width, uint32_t height, uint32_t mips, u32 format,
                                     const char* label) noexcept;
TextureHandle new_render_texture(uint32_t width, uint32_t height, u32 fmt, const char* label) noexcept;
void write_texture(const TextureRef& ref, ArrayRef<uint8_t> data) noexcept;
}; // namespace aurora::gfx

struct GXTexObj_ {
  aurora::gfx::TextureHandle ref;
  const void* data;
  u32 dataSize;
  u16 width;
  u16 height;
  u32 fmt;
  GXTexWrapMode wrapS;
  GXTexWrapMode wrapT;
  GXBool hasMips;
  GXTexFilter minFilter;
  GXTexFilter magFilter;
  float minLod;
  float maxLod;
  float lodBias;
  GXBool biasClamp;
  GXBool doEdgeLod;
  GXAnisotropy maxAniso;
  GXTlut tlut;
  bool dataInvalidated;
};
static_assert(sizeof(GXTexObj_) <= sizeof(GXTexObj), "GXTexObj too small!");
struct GXTlutObj_ {
  aurora::gfx::TextureHandle ref;
};
static_assert(sizeof(GXTlutObj_) <= sizeof(GXTlutObj), "GXTlutObj too small!");

namespace aurora::gfx {
struct TextureBind {
  GXTexObj_ texObj;

  TextureBind() noexcept = default;
  TextureBind(GXTexObj_ obj) noexcept : texObj(std::move(obj)) {}
  void reset() noexcept { texObj.ref.reset(); };
  [[nodiscard]] wgpu::SamplerDescriptor get_descriptor() const noexcept;
  operator bool() const noexcept { return texObj.ref.operator bool(); }
};
} // namespace aurora::gfx