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21#define SKIP_PIXEL(to) (to += deststep)
22#if DEPTH == 8
23# define PIXEL_TYPE uint8_t
24# define COPY_PIXEL(to, from) do { *to = from; SKIP_PIXEL(to); } while (0)
25# define COPY_PIXEL1(to, from) (*to++ = from)
26#elif DEPTH == 15 || DEPTH == 16
27# define PIXEL_TYPE uint16_t
28# define COPY_PIXEL(to, from) do { *to = from; SKIP_PIXEL(to); } while (0)
29# define COPY_PIXEL1(to, from) (*to++ = from)
30#elif DEPTH == 24
31# define PIXEL_TYPE uint8_t
32# define COPY_PIXEL(to, from) \
33 do { \
34 to[0] = from; \
35 to[1] = (from) >> 8; \
36 to[2] = (from) >> 16; \
37 SKIP_PIXEL(to); \
38 } while (0)
39
40# define COPY_PIXEL1(to, from) \
41 do { \
42 *to++ = from; \
43 *to++ = (from) >> 8; \
44 *to++ = (from) >> 16; \
45 } while (0)
46#elif DEPTH == 32
47# define PIXEL_TYPE uint32_t
48# define COPY_PIXEL(to, from) do { *to = from; SKIP_PIXEL(to); } while (0)
49# define COPY_PIXEL1(to, from) (*to++ = from)
50#else
51# error unknown bit depth
52#endif
53
54#ifdef HOST_WORDS_BIGENDIAN
55# define SWAP_WORDS 1
56#endif
57
58static void glue(blizzard_draw_line16_, DEPTH)(PIXEL_TYPE *dest,
59 const uint16_t *src, unsigned int width)
60{
61#if !defined(SWAP_WORDS) && DEPTH == 16
62 memcpy(dest, src, width);
63#else
64 uint16_t data;
65 unsigned int r, g, b;
66 const uint16_t *end = (const void *) src + width;
67 while (src < end) {
68 data = *src ++;
69 b = (data & 0x1f) << 3;
70 data >>= 5;
71 g = (data & 0x3f) << 2;
72 data >>= 6;
73 r = (data & 0x1f) << 3;
74 data >>= 5;
75 COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));
76 }
77#endif
78}
79
80static void glue(blizzard_draw_line24mode1_, DEPTH)(PIXEL_TYPE *dest,
81 const uint8_t *src, unsigned int width)
82{
83
84
85 unsigned int r[2], g[2], b[2];
86 const uint8_t *end = src + width;
87 while (src < end) {
88 g[0] = *src ++;
89 r[0] = *src ++;
90 r[1] = *src ++;
91 b[0] = *src ++;
92 COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[0], g[0], b[0]));
93 b[1] = *src ++;
94 g[1] = *src ++;
95 COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[1], g[1], b[1]));
96 }
97}
98
99static void glue(blizzard_draw_line24mode2_, DEPTH)(PIXEL_TYPE *dest,
100 const uint8_t *src, unsigned int width)
101{
102 unsigned int r, g, b;
103 const uint8_t *end = src + width;
104 while (src < end) {
105 r = *src ++;
106 src ++;
107 b = *src ++;
108 g = *src ++;
109 COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));
110 }
111}
112
113
114static blizzard_fn_t glue(blizzard_draw_fn_, DEPTH)[0x10] = {
115 NULL,
116
117 (blizzard_fn_t) glue(blizzard_draw_line16_, DEPTH),
118
119 (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),
120
121 (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),
122 NULL, NULL,
123
124 (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),
125
126 (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),
127
128 NULL,
129
130 NULL,
131 NULL, NULL, NULL, NULL, NULL, NULL,
132};
133
134
135static blizzard_fn_t glue(blizzard_draw_fn_r_, DEPTH)[0x10] = {
136
137 [0 ... 0xf] = NULL,
138};
139
140#undef DEPTH
141#undef SKIP_PIXEL
142#undef COPY_PIXEL
143#undef COPY_PIXEL1
144#undef PIXEL_TYPE
145
146#undef SWAP_WORDS
147