69 static png_infop info_ptr = NULL;  variable
106     info_ptr = png_create_info_struct(png_ptr);  in readpng_init()
107     if (!info_ptr) {  in readpng_init()
122         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_init()
130     png_read_info(png_ptr, info_ptr);  /* read all PNG info up to image data */  in readpng_init()
137     png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,  in readpng_init()
163         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_bgcolor()
168     if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD))  in readpng_get_bgcolor()
175     png_get_bKGD(png_ptr, info_ptr, &pBackground);  in readpng_get_bgcolor()
217         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
230     if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))  in readpng_get_image()
243     if (png_get_gAMA(png_ptr, info_ptr, &gamma))  in readpng_get_image()
250     png_read_update_info(png_ptr, info_ptr);  in readpng_get_image()
252     *pRowbytes = rowbytes = png_get_rowbytes(png_ptr, info_ptr);  in readpng_get_image()
253     *pChannels = (int)png_get_channels(png_ptr, info_ptr);  in readpng_get_image()
256         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
260         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_get_image()
299     if (png_ptr && info_ptr) {  in readpng_cleanup()
300         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);  in readpng_cleanup()
302         info_ptr = NULL;  in readpng_cleanup()