Linux frame buffer

AN2641

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Doc ID 14027 Rev 1

Figure 17.

Structure fb_ops

struct fb_ops {

struct module *owner;

/* Driver open */

int (*fb_open)(struct fb_info *info, int user);

/* Driver close */

int (*fb_release)(struct fb_info *info, int user);

/* ... */

/* Sanity check on video parameters */

int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);

/* Configure the video controller registers */

int (*fb_set_par)(struct fb_info *info);

/* Create pseudo color palette map */

int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info);

/* Blank/unblank display */

int (*fb_blank)(int blank, struct fb_info *info);

/* ... */

/* Accelerated method to fill a rectangle with pixel lines */

void (*fb_fillrect)(struct fb_info *info, const struct fb_fillrect *rect);

/* Accelerated method to copy a rectangular area from one screen region to another */

void (*fb_copyarea)(struct fb_info *info,const struct fb_copyarea *region);

/* Accelerated method to draw an image to the display */

void (*fb_imageblit)(struct fb_info *info, const struct fb_image *image);

/* Accelerated method to rotate the display */

void (*fb_rotate)(struct fb_info *info, int angle);

/* Ioctl interface to support device-specific commands */

int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, unsigned long arg);

/* ... */

};