Function d3d_UploadBitmapToSurface

legacy/renderer/Direct3D.cpp:548–746

Given a bitmap handle, a map type, and a destination d3d slot, takes the data from the application and massages it for direct3d's consumption

// Given a bitmap handle, a map type, and a destination d3d slot, takes the data
// from the application and massages it for direct3d's consumption
void d3d_UploadBitmapToSurface(int handle, int map_type, int slot, int new_upload) {
  DDSURFACEDESC2 surf_desc;
  LPDIRECTDRAWSURFACE4 dest_sp, upload_sp;

  HRESULT ddrval;
  int w, h;
  uint16_t *src_data;

  // mprintf(0,"Uploading bitmap %d type %d\n",handle,map_type);
  // mprintf(0,"Slot=%d handle=%d\n",slot,handle);

  ASSERT(slot != -1);
  ASSERT(slot == handle);

  int tex_class = d3d_GetTexClass(handle, map_type);

  if (map_type == MAP_TYPE_BITMAP) {
    w = bm_w(handle, 0);
    h = bm_h(handle, 0);

    ASSERT(GameBitmaps[handle].cache_slot == handle);

    if (bm_format(handle) == BITMAP_FORMAT_4444)
      upload_sp = Upload4444Surfaces[tex_class];
    else
      upload_sp = UploadSurfaces[tex_class];
    dest_sp = BitmapTextureSurfaces[slot];

    src_data = bm_data(handle, 0);
  } else if (map_type == MAP_TYPE_BUMPMAP) {
    w = bump_w(handle);
    h = bump_h(handle);

    ASSERT(GameBumpmaps[handle].cache_slot == handle);
    dest_sp = BumpmapTextureSurfaces[slot];
    src_data = bump_data(handle);
  } else {
    w = lm_w(handle);
    h = lm_h(handle);

    ASSERT(GameLightmaps[handle].cache_slot == handle);
    dest_sp = LightmapTextureSurfaces[slot];
    upload_sp = UploadSurfaces[tex_class];

    src_data = lm_data(handle);
  }

  ASSERT(dest_sp != NULL);

  memset(&surf_desc, 0, sizeof(DDSURFACEDESC2));
  surf_desc.dwSize = sizeof(DDSURFACEDESC2);
  surf_desc.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);

  // Now that we have a lock, blit this bitmap to the surface
  if (map_type == MAP_TYPE_BUMPMAP) {
    ddrval = dest_sp->Lock(NULL, &surf_desc, DDLOCK_WAIT, NULL);
    if (ddrval != DD_OK) {
      mprintf(0, "D3D:Normal upload lock error %d! %s\n", ddrval, d3d_ErrorString(ddrval));