156     m_png = png_create_read_struct(PNG_LIBPNG_VER_STRING,  in ReadImage()
159     if (!m_png)  in ReadImage()
164     png_instance = m_png;  in ReadImage()
166     m_info = png_create_info_struct(m_png);  in ReadImage()
170         png_destroy_read_struct(&m_png, NULL, NULL);  in ReadImage()
174     png_init_io(m_png, file);  in ReadImage()
175     png_set_sig_bytes(m_png, 8);  in ReadImage()
176     png_read_png(m_png, m_info, PNG_TRANSFORM_IDENTITY, NULL);  in ReadImage()
182     if (png_get_IHDR(m_png, m_info, &width, &height, NULL, NULL, NULL, NULL, NULL) != 0)  in ReadImage()
184         mpRowPointers = png_get_rows(m_png, m_info);  in ReadImage()
192                 png_destroy_read_struct(&m_png, &m_info, NULL);  in ReadImage()
199     png_destroy_read_struct(&m_png, &m_info, NULL);  in ReadImage()
216     m_png = png_create_read_struct(PNG_LIBPNG_VER_STRING,  in ReadImage()
219     if (!m_png)  in ReadImage()
223     png_instance = m_png;  in ReadImage()
225     m_info = png_create_info_struct(m_png);  in ReadImage()
228         png_destroy_read_struct(&m_png, NULL, NULL);  in ReadImage()
233     png_set_read_fn(m_png, input_stream, ReadDataFromIStream);  in ReadImage()
235     png_set_sig_bytes(m_png, 8);  in ReadImage()
236     png_read_png(m_png, m_info, PNG_TRANSFORM_IDENTITY, NULL);  in ReadImage()
242     if (png_get_IHDR(m_png, m_info, &width, &height, NULL, NULL, NULL, NULL, NULL) != 0)  in ReadImage()
244         mpRowPointers = png_get_rows(m_png, m_info);  in ReadImage()
252                 png_destroy_read_struct(&m_png, &m_info, NULL);  in ReadImage()
258     png_destroy_read_struct(&m_png, &m_info, NULL);  in ReadImage()
749     if (png_get_IHDR(m_png, m_info, NULL, NULL, &bit_depth, &color_type, NULL, NULL, NULL) == 0)  in ConfigureInternalFormat()
755     if (png_get_tRNS(m_png, m_info, NULL, &num_trans, NULL) == 0)  in ConfigureInternalFormat()