Mon, 26 Aug 2002 06:03:55 +0000
now use C99 stdint.h and stdbool.h
1 typedef struct Point
2 {
3 int32_t x;
4 int32_t y;
5 } Point;
7 typedef struct Rect
8 {
9 Point min;
10 Point max;
11 } Rect;
13 static inline int32_t rect_width (Rect *r)
14 {
15 return (r->max.x - r->min.x);
16 }
18 static inline int32_t rect_height (Rect *r)
19 {
20 return (r->max.y - r->min.y);
21 }
24 typedef uint32_t word_type;
25 #define BITS_PER_WORD (8 * sizeof (word_type))
26 #define ALL_ONES (~ 0U)
29 typedef struct Bitmap
30 {
31 word_type *bits;
32 Rect rect;
33 uint32_t row_words;
34 } Bitmap;
37 #define TF_SRC 0xc
38 #define TF_AND 0x8
39 #define TF_OR 0xe
40 #define TF_XOR 0x6
43 Bitmap *create_bitmap (Rect *rect);
44 void free_bitmap (Bitmap *bitmap);
46 bool get_pixel (Bitmap *bitmap, Point coord);
47 void set_pixel (Bitmap *bitmap, Point coord, bool value);
50 Bitmap *bitblt (Bitmap *src_bitmap,
51 Rect *src_rect,
52 Bitmap *dest_bitmap,
53 Point *dest_min,
54 int tfn,
55 int background);
58 /* in-place transformations */
59 void flip_h (Bitmap *src);
60 void flip_v (Bitmap *src);
62 void rot_180 (Bitmap *src); /* combination of flip_h and flip_v */
64 /* "in-place" transformations - will allocate new memory and free old */
65 void transpose (Bitmap *src);
67 void rot_90 (Bitmap *src); /* transpose + flip_h */
68 void rot_270 (Bitmap *src); /* transpose + flip_v */
71 void reverse_bits (uint8_t *p, int byte_count);