os-update.h

#ifndef _OS_UPDATE_H_
#define _OS_UPDATE_H_

#include <stdbool.h>

/* Initializes the minui
 *
 * @return 0 when successfull
 * @return -1 when init fails, in this case anything below shouldn't be used.
 */
int osUpdateScreenInit(bool blank);

/*
 * Loads logo and overrides the old logo if already loaded.
 * @param filename of the file located in dir without extension or
 *         path e.g. /res/images/logo.png => filename:logo, dir:/res/images
 * @param dir directory with images
 * @return 0 when loading successful
 * @return -1 when loading fails
 */
int loadLogo(const char *filename, const char *dir);

/*
 * Draw logo if one has been loaded with loadLogo.
 * @return 0 when logo drawn successfully
 * @return -1 if there is no logo to show
 */
int showLogo(void);

/*
 *  Draw progress bar to the screen with logo if defined.
 *  @param percentage precentage number between 0 and 100 that is shown
 *         as a progress bar on the screen.
 */
void osUpdateScreenShowProgress(int percentage);

/* Should be called before ending application, to free memory etc. */
void osUpdateScreenExit(void);

#endif /* _OS_UPDATE_H_ */