badge/ui/display.h

   1 #ifndef INCLUDED_BADGE2013_MOCKUP_DISPLAY_H
   2 #define INCLUDED_BADGE2013_MOCKUP_DISPLAY_H
   3
   4 #include <stdint.h>
   5 #include <stddef.h>
   6 #include <string.h>
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12   enum {
  13     BADGE_DISPLAY_WIDTH         = 96,
  14     BADGE_DISPLAY_HEIGHT        = 68,
  15
  16     BADGE_DISPLAY_STRIPE_HEIGHT = 8,
  17     BADGE_DISPLAY_STRIPE_COUNT  = (BADGE_DISPLAY_HEIGHT - 1) / BADGE_DISPLAY_STRIPE_HEIGHT + 1
  18   };
  19
  20   typedef uint8_t badge_display_stripe[BADGE_DISPLAY_WIDTH];
  21   typedef struct {
  22     badge_display_stripe data[BADGE_DISPLAY_STRIPE_COUNT];
  23   } badge_framebuffer;
  24
  25   void badge_display_init(void);
  26   void badge_framebuffer_flush(badge_framebuffer const *fb);
  27
  28   static inline void badge_framebuffer_clear(badge_framebuffer *fb) {
  29     memset(fb, 0, sizeof(*fb));
  30   }
  31
  32   static inline uint8_t badge_framebuffer_pixel(badge_framebuffer *fb,
  33                                                 uint8_t x,
  34                                                 uint8_t y) {
  35     return fb->data[y / BADGE_DISPLAY_STRIPE_HEIGHT][x] >> (y % BADGE_DISPLAY_STRIPE_HEIGHT) & 1;
  36   }
  37
  38   static inline void badge_framebuffer_pixel_on(badge_framebuffer *fb,
  39                                                 uint8_t x,
  40                                                 uint8_t y) {
  41     fb->data[y / BADGE_DISPLAY_STRIPE_HEIGHT][x] |= 1 << (y % BADGE_DISPLAY_STRIPE_HEIGHT);
  42   }
  43
  44   static inline void badge_framebuffer_pixel_off(badge_framebuffer *fb,
  45                                                  uint8_t x,
  46                                                  uint8_t y) {
  47     fb->data[y / BADGE_DISPLAY_STRIPE_HEIGHT][x] &= ~(1 << (y % BADGE_DISPLAY_STRIPE_HEIGHT));
  48   }
  49
  50   static inline void badge_framebuffer_pixel_flip(badge_framebuffer *fb,
  51                                                   uint8_t x,
  52                                                   uint8_t y) {
  53     fb->data[y / BADGE_DISPLAY_STRIPE_HEIGHT][x] ^= 1 << (y % BADGE_DISPLAY_STRIPE_HEIGHT);
  54   }
  55
  56   static inline void badge_framebuffer_pixel_set(badge_framebuffer *fb,
  57                                                  uint8_t x,
  58                                                  uint8_t y,
  59                                                  uint8_t val) {
  60     if(val) {
  61       badge_framebuffer_pixel_on (fb, x, y);
  62     } else {
  63       badge_framebuffer_pixel_off(fb, x, y);
  64     }
  65   }
  66
  67 #ifdef __cplusplus
  68 }
  69 #endif
  70
  71 #endif