139     png_structp png_ptr = NULL;  in read_PNG_File()  local
168     if (!(png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,  in read_PNG_File()
174     if (!(info_ptr = png_create_info_struct(png_ptr))) {  in read_PNG_File()
178     if (!(end_info = png_create_info_struct(png_ptr))) {  in read_PNG_File()
183     if (setjmp(png_jmpbuf(png_ptr))) {  in read_PNG_File()
187     png_init_io(png_ptr, pIn);  in read_PNG_File()
188     png_set_sig_bytes(png_ptr, PNG_HEADER_SIZE);  in read_PNG_File()
189     png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY  in read_PNG_File()
193     row_pointers = png_get_rows(png_ptr, info_ptr);  in read_PNG_File()
196         png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,  in read_PNG_File()
221     if (png_ptr) {  in read_PNG_File()
222         png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);  in read_PNG_File()
409     png_structp png_ptr = NULL;  in writePNGFile()  local
412     if (!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,  in writePNGFile()
414             = png_create_info_struct(png_ptr))) {  in writePNGFile()
419     if (setjmp(png_jmpbuf(png_ptr))) {  in writePNGFile()
428     png_init_io(png_ptr, pOut);  in writePNGFile()
430     png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB,  in writePNGFile()
434     png_write_info(png_ptr, info_ptr);  in writePNGFile()
437         png_write_row(png_ptr, pImageData + y * imageStride);  in writePNGFile()
439     png_write_end(png_ptr, info_ptr);  in writePNGFile()
443     exit: if (png_ptr) {  in writePNGFile()
444         png_destroy_write_struct(&png_ptr, &info_ptr);  in writePNGFile()