70 static png_infop info_ptr = NULL;  variable
108     info_ptr = png_create_info_struct(png_ptr);  in readpng_init()
109     if (!info_ptr) {  in readpng_init()
124         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_init()
132     png_read_info(png_ptr, info_ptr);  /* read all PNG info up to image data */  in readpng_init()
139     png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,  in readpng_init()
165         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_bgcolor()
170     if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD))  in readpng_get_bgcolor()
177     png_get_bKGD(png_ptr, info_ptr, &pBackground);  in readpng_get_bgcolor()
223         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
236     if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))  in readpng_get_image()
255     if (png_get_gAMA(png_ptr, info_ptr, &gamma))  in readpng_get_image()
262     png_read_update_info(png_ptr, info_ptr);  in readpng_get_image()
264     *pRowbytes = rowbytes = png_get_rowbytes(png_ptr, info_ptr);  in readpng_get_image()
265     *pChannels = (int)png_get_channels(png_ptr, info_ptr);  in readpng_get_image()
274         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
278         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
318     if (png_ptr && info_ptr) {
319         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
321         info_ptr = NULL;