369                          std::unordered_set<uint32_t>* alpha_palette) {  in WritePalette()  argument
371   CHECK(alpha_palette->size() <= 256);  in WritePalette()
379   for (uint32_t color : *alpha_palette) {  in WritePalette()
394   if (!alpha_palette->empty()) {  in WritePalette()
395     alpha_palette_bytes = std::unique_ptr<png_byte[]>(new png_byte[alpha_palette->size()]);  in WritePalette()
411       CHECK(static_cast<size_t>(index) < alpha_palette->size());  in WritePalette()
422     png_set_tRNS(write_ptr, write_info_ptr, alpha_palette_bytes.get(), alpha_palette->size(),  in WritePalette()
518   std::unordered_set<uint32_t> alpha_palette;  in WritePng()  local
548         alpha_palette.insert(color);  in WritePng()
568     msg << " paletteSize=" << color_palette.size() << " alphaPaletteSize=" << alpha_palette.size()  in WritePng()
578                     nine_patch != nullptr, color_palette.size(), alpha_palette.size());  in WritePng()
615     WritePalette(write_ptr, write_info_ptr, &color_palette, &alpha_palette);  in WritePng()