37   PngReadStructDeleter(png_structp read_ptr, png_infop info_ptr)  in PngReadStructDeleter()  argument
38       : read_ptr_(read_ptr), info_ptr_(info_ptr) {}  in PngReadStructDeleter()
177   png_structp read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);  in ReadPng()  local
178   if (read_ptr == nullptr) {  in ReadPng()
184   png_infop info_ptr = png_create_info_struct(read_ptr);  in ReadPng()
187     png_destroy_read_struct(&read_ptr, nullptr, nullptr);  in ReadPng()
192   PngReadStructDeleter png_read_deleter(read_ptr, info_ptr);  in ReadPng()
197   if (setjmp(png_jmpbuf(read_ptr))) {  in ReadPng()
202   png_set_error_fn(read_ptr, (png_voidp)&source_diag, LogError, LogWarning);  in ReadPng()
205   png_set_read_fn(read_ptr, (png_voidp)in, ReadDataFromStream);  in ReadPng()
208   png_set_sig_bytes(read_ptr, kPngSignatureSize);  in ReadPng()
211   png_read_info(read_ptr, info_ptr);  in ReadPng()
216   png_get_IHDR(read_ptr, info_ptr, &width, &height, &bit_depth, &color_type,  in ReadPng()
223     png_set_palette_to_rgb(read_ptr);  in ReadPng()
227     png_set_expand_gray_1_2_4_to_8(read_ptr);  in ReadPng()
230   if (png_get_valid(read_ptr, info_ptr, PNG_INFO_tRNS)) {  in ReadPng()
231     png_set_tRNS_to_alpha(read_ptr);  in ReadPng()
235     png_set_strip_16(read_ptr);  in ReadPng()
239     png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER);  in ReadPng()
244     png_set_gray_to_rgb(read_ptr);  in ReadPng()
248     png_set_interlace_handling(read_ptr);  in ReadPng()
253   png_read_update_info(read_ptr, info_ptr);  in ReadPng()
268   const size_t row_bytes = png_get_rowbytes(read_ptr, info_ptr);  in ReadPng()
281   png_read_image(read_ptr, output_image->rows.get());  in ReadPng()
284   png_read_end(read_ptr, info_ptr);  in ReadPng()