diff options
Diffstat (limited to 'apps/osmocomBB/osmocomBB/include/fb/fb_bw8.h')
| -rw-r--r-- | apps/osmocomBB/osmocomBB/include/fb/fb_bw8.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/apps/osmocomBB/osmocomBB/include/fb/fb_bw8.h b/apps/osmocomBB/osmocomBB/include/fb/fb_bw8.h new file mode 100644 index 0000000000..c77fa71f19 --- /dev/null +++ b/apps/osmocomBB/osmocomBB/include/fb/fb_bw8.h @@ -0,0 +1,51 @@ +#ifndef FB_BW8_H +#define FB_BW8_H + +/* 8bit monochrome framebuffer, organized with 8 stacked pixels + per byte, backed by local memory. fb_bw8.c lists functions that + are common to simmilar organized displays. */ + +/* + Sketch of Memory Layout + Left Upper Corner of Display + + col0 col2 + col1 + +------------- + 1st row: | A0 B0 C0 + 2nd row: | A1 B1 C1 + ... + 7th row: | A6 B6 C6 + 8th row: | A7 B7 C7 + 9th row: | Q0 R0 S0 + 10th row: | Q1 R1 S1 ... + ... + + Backing store (and internal display memory?) looks like... + + uint8_t mem[] = { A, B, C, .... Q, R, S, ... } + + We work on a in-memory copy of the framebuffer and only + update the physical display on demand. The damage window + has two corners, left upper inclusive x1,y1 and right + lower x2,y2 exclusive. So dirty pixels are defined to + be x1 <= x_pixel < x2 and y1 <= y_pixel < y2. +*/ + +/* data specific to a bw8-type framebuffer as described above */ + +struct fb_bw8 { + uint8_t *mem; /* set to backingstore memory */ + uint16_t damage_x1,damage_y1; /* current damage window, ul */ + uint16_t damage_x2,damage_y2; /* current damage window, lr */ +}; + +extern struct fb_bw8 *fb_bw8; /* symbol defined by the specific LCD driver */ + +extern void fb_bw8_clear(); +extern void fb_bw8_boxto(uint16_t x,uint16_t y); /* draw a box from cursor to x,y */ +extern void fb_bw8_lineto(uint16_t x,uint16_t y); /* draw a line from cursor to x,y */ + +extern int fb_bw8_putstr(char *str,int maxwidth); + +#endif |