83 static void readDataFromStream(png_structp readPtr, png_bytep data,  in readDataFromStream()  argument
86       reinterpret_cast<std::istream*>(png_get_io_ptr(readPtr));  in readDataFromStream()
88     png_error(readPtr, strerror(errno));  in readDataFromStream()
101 static void logWarning(png_structp readPtr, png_const_charp warningMessage) {  in logWarning()  argument
103       reinterpret_cast<IDiagnostics*>(png_get_error_ptr(readPtr));  in logWarning()
107 static bool readPng(IDiagnostics* diag, png_structp readPtr, png_infop infoPtr,  in readPng()  argument
109   if (setjmp(png_jmpbuf(readPtr))) {  in readPng()
114   png_set_sig_bytes(readPtr, kPngSignatureSize);  in readPng()
115   png_read_info(readPtr, infoPtr);  in readPng()
118   png_get_IHDR(readPtr, infoPtr, &outInfo->width, &outInfo->height, &bitDepth,  in readPng()
122     png_set_palette_to_rgb(readPtr);  in readPng()
126     png_set_expand_gray_1_2_4_to_8(readPtr);  in readPng()
129   if (png_get_valid(readPtr, infoPtr, PNG_INFO_tRNS)) {  in readPng()
130     png_set_tRNS_to_alpha(readPtr);  in readPng()
134     png_set_strip_16(readPtr);  in readPng()
138     png_set_add_alpha(readPtr, 0xFF, PNG_FILLER_AFTER);  in readPng()
143     png_set_gray_to_rgb(readPtr);  in readPng()
146   png_set_interlace_handling(readPtr);  in readPng()
147   png_read_update_info(readPtr, infoPtr);  in readPng()
149   const uint32_t rowBytes = png_get_rowbytes(readPtr, infoPtr);  in readPng()
155   png_read_image(readPtr, outInfo->rows.data());  in readPng()
156   png_read_end(readPtr, infoPtr);  in readPng()
1253   png_structp readPtr = nullptr;  in process()  local
1259   readPtr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, nullptr, nullptr);  in process()
1260   if (!readPtr) {  in process()
1265   infoPtr = png_create_info_struct(readPtr);  in process()
1271   png_set_error_fn(readPtr, reinterpret_cast<png_voidp>(mDiag), nullptr,  in process()
1275   png_set_read_fn(readPtr, (png_voidp)input, readDataFromStream);  in process()
1277   if (!readPng(mDiag, readPtr, infoPtr, &pngInfo)) {  in process()
1315   if (readPtr) {  in process()
1316     png_destroy_read_struct(&readPtr, &infoPtr, nullptr);  in process()