aurora/lib/gx/attr_fmt.cpp

#include "gx.hpp"

#include "../internal.hpp"
#include "gx_fmt.hpp"

static aurora::Module Log("aurora::gx");

namespace aurora::gx {

u8 comp_type_size(GXAttr attr, GXCompType type) noexcept {
  switch (attr) {
  case GX_VA_PNMTXIDX:
  case GX_VA_TEX0MTXIDX:
  case GX_VA_TEX1MTXIDX:
  case GX_VA_TEX2MTXIDX:
  case GX_VA_TEX3MTXIDX:
  case GX_VA_TEX4MTXIDX:
  case GX_VA_TEX5MTXIDX:
  case GX_VA_TEX6MTXIDX:
  case GX_VA_TEX7MTXIDX:
    return 1;
  case GX_VA_CLR0:
  case GX_VA_CLR1:
    switch (type) {
    case GX_RGB565:
    case GX_RGBA4:
      return 2;
    case GX_RGB8:
    case GX_RGBA6:
      return 3;
    case GX_RGBX8:
    case GX_RGBA8:
      return 4;
    }
  default:
    switch (type) {
    case GX_U8:
    case GX_S8:
      return 1;
    case GX_U16:
    case GX_S16:
      return 2;
    case GX_F32:
      return 4;
    default:
      Log.fatal("comp_type_size: Unsupported component type {}", type);
    }
  }
}

u8 comp_cnt_count(GXAttr attr, GXCompCnt cnt) noexcept {
  switch (attr) {
  case GX_VA_PNMTXIDX:
  case GX_VA_TEX0MTXIDX:
  case GX_VA_TEX1MTXIDX:
  case GX_VA_TEX2MTXIDX:
  case GX_VA_TEX3MTXIDX:
  case GX_VA_TEX4MTXIDX:
  case GX_VA_TEX5MTXIDX:
  case GX_VA_TEX6MTXIDX:
  case GX_VA_TEX7MTXIDX:
    return 1;
  case GX_VA_POS:
    switch (cnt) {
    case GX_POS_XY:
      return 2;
    case GX_POS_XYZ:
      return 3;
    default:
      break;
    }
    break;
  case GX_VA_NRM:
    switch (cnt) {
    case GX_NRM_XYZ:
      return 3;
    case GX_NRM_NBT:
    case GX_NRM_NBT3:
      return 9;
    default:
      break;
    }
    break;
  case GX_VA_CLR0:
  case GX_VA_CLR1:
    return 1;
  case GX_VA_TEX0:
  case GX_VA_TEX1:
  case GX_VA_TEX2:
  case GX_VA_TEX3:
  case GX_VA_TEX4:
  case GX_VA_TEX5:
  case GX_VA_TEX6:
  case GX_VA_TEX7:
    switch (cnt) {
    case GX_TEX_S:
      return 1;
    case GX_TEX_ST:
      return 2;
    default:
      break;
    }
    break;
  default:
    break;
  }
  Log.fatal("comp_cnt_count: Unsupported attr/cnt {} {}", attr, cnt);
}

} // namespace aurora::gx