Function PageInVClip

Descent3/vclip.cpp:283–404

Pages in a vclip if it needs to be

extern int Low_vidmem;
// Pages in a vclip if it needs to be
void PageInVClip(int vcnum) {
  ASSERT(GameVClips[vcnum].used);
  if (!(GameVClips[vcnum].flags & VCF_NOT_RESIDENT))
    return;

  int mipped = 0;
  int texture_size = GameVClips[vcnum].target_size;
  vclip *vc = &GameVClips[vcnum];
  if (vc->flags & VCF_WANTS_MIPPED)
    mipped = 1;

  CFILE *infile = (CFILE *)cfopen(vc->name, "rb");
  if (!infile) {
    // due to a bug in some 3rd party tablefile editors, full paths might
    // have been used when they shouldn't have been
    char *end_ptr, *start_ptr;
    start_ptr = vc->name;
    end_ptr = start_ptr + strlen(start_ptr) - 1;
    while ((end_ptr >= start_ptr) && (*end_ptr != '\\'))
      end_ptr--;
    if (end_ptr < start_ptr) {
      mprintf(0, "Couldn't load vclip %s!\n", vc->name);
      return;
    }

    ASSERT(*end_ptr == '\\');
    end_ptr++;

    infile = (CFILE *)cfopen(end_ptr, "rb");
    if (!infile) {
      mprintf(0, "Couldn't load vclip %s!\n", vc->name);
      return;
    }
  }

  mprintf(0, "Paging in vclip %s!\n", vc->name);

  uint8_t start_val = cf_ReadByte(infile);
  int version = 0;
  if (start_val != 127) {
    version = 0;
    vc->num_frames = start_val;
    cf_ReadFloat(infile);
    vc->frame_time = cf_ReadFloat(infile);
    cf_ReadInt(infile);
    cf_ReadFloat(infile);
    vc->frame_time = DEFAULT_FRAMETIME;
  } else {
    version = cf_ReadByte(infile);
    vc->num_frames = cf_ReadByte(infile);
    vc->frame_time = cf_ReadFloat(infile);
    vc->frame_time = DEFAULT_FRAMETIME;
  }

  for (int i = 0; i < vc->num_frames; i++) {
    int n = bm_AllocLoadBitmap(infile, mipped);

    ASSERT(n > 0);