Function d3d_MakeBitmapCurrent

legacy/renderer/Direct3D.cpp:1704–1782

Sets up our bitmap/lightmap/bumpmap to be the next thing drawn

extern bool Force_one_texture;
// Sets up our bitmap/lightmap/bumpmap to be the next thing drawn
int d3d_MakeBitmapCurrent(int handle, int map_type, int tn) {
  LPDIRECT3DTEXTURE2 tex_interface;
  HRESULT ddrval;
  LPDIRECTDRAWSURFACE4 sp;

  if (map_type == MAP_TYPE_BITMAP) {
    if (Force_one_texture)
      handle = 0;

    if (GameBitmaps[handle].cache_slot == -1) {
      int retval = d3d_CreateTextureFromBitmap(handle, map_type);
      if (retval < 0)
        return 0;
    } else {
      if (GameBitmaps[handle].flags & BF_CHANGED) {
        d3d_UploadBitmapToSurface(handle, map_type, GameBitmaps[handle].cache_slot, 0);
      }
    }

    ASSERT(GameBitmaps[handle].cache_slot != -1);

    sp = BitmapTextureSurfaces[GameBitmaps[handle].cache_slot];
  } else if (map_type == MAP_TYPE_BUMPMAP) {
    if (GameBumpmaps[handle].cache_slot == -1) {
      int retval = d3d_CreateTextureFromBitmap(handle, map_type);
      if (retval < 0)
        return 0;
    } else {
      if (GameBumpmaps[handle].flags & BUMPF_CHANGED) {
        d3d_UploadBitmapToSurface(handle, map_type, GameBumpmaps[handle].cache_slot, 0);
      }
    }

    ASSERT(GameBumpmaps[handle].cache_slot != -1);

    sp = BumpmapTextureSurfaces[GameBumpmaps[handle].cache_slot];
  } else {
    if (Force_one_texture)
      handle = 0;

    if (GameLightmaps[handle].cache_slot == -1) {
      int retval = d3d_CreateTextureFromBitmap(handle, map_type);
      if (retval < 0)
        return 0;
    } else {
      if (GameLightmaps[handle].flags & LF_CHANGED) {
        d3d_UploadBitmapToSurface(handle, map_type, GameLightmaps[handle].cache_slot, 0);
      }
    }

    ASSERT(GameLightmaps[handle].cache_slot != -1);
    sp = LightmapTextureSurfaces[GameLightmaps[handle].cache_slot];
  }

  int texnum = handle;
  if (map_type == MAP_TYPE_LIGHTMAP)
    texnum += 100000;
  else if (map_type == MAP_TYPE_BUMPMAP)