1 /*
2 * Pixel drawing function templates for QEMU SM501 Device
3 *
4 * Copyright (c) 2008 Shin-ichiro KAWASAKI
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #if DEPTH == 8
26 #define BPP 1
27 #define PIXEL_TYPE uint8_t
28 #elif DEPTH == 15 || DEPTH == 16
29 #define BPP 2
30 #define PIXEL_TYPE uint16_t
31 #elif DEPTH == 32
32 #define BPP 4
33 #define PIXEL_TYPE uint32_t
34 #else
35 #error unsupport depth
36 #endif
37
38 #ifdef BGR_FORMAT
39 #define PIXEL_NAME glue(DEPTH, bgr)
40 #else
41 #define PIXEL_NAME DEPTH
42 #endif /* BGR_FORMAT */
43
44
glue(draw_line8_,PIXEL_NAME)45 static void glue(draw_line8_, PIXEL_NAME)(
46 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
47 {
48 uint8_t v, r, g, b;
49 do {
50 v = ldub_p(s);
51 r = (pal[v] >> 16) & 0xff;
52 g = (pal[v] >> 8) & 0xff;
53 b = (pal[v] >> 0) & 0xff;
54 *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
55 s++;
56 d += BPP;
57 } while (--width != 0);
58 }
59
glue(draw_line16_,PIXEL_NAME)60 static void glue(draw_line16_, PIXEL_NAME)(
61 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
62 {
63 uint16_t rgb565;
64 uint8_t r, g, b;
65
66 do {
67 rgb565 = lduw_le_p(s);
68 r = (rgb565 >> 8) & 0xf8;
69 g = (rgb565 >> 3) & 0xfc;
70 b = (rgb565 << 3) & 0xf8;
71 *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
72 s += 2;
73 d += BPP;
74 } while (--width != 0);
75 }
76
glue(draw_line32_,PIXEL_NAME)77 static void glue(draw_line32_, PIXEL_NAME)(
78 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
79 {
80 uint8_t r, g, b;
81
82 do {
83 r = s[2];
84 g = s[1];
85 b = s[0];
86 *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
87 s += 4;
88 d += BPP;
89 } while (--width != 0);
90 }
91
92 /**
93 * Draw hardware cursor image on the given line.
94 */
glue(draw_hwc_line_,PIXEL_NAME)95 static void glue(draw_hwc_line_, PIXEL_NAME)(uint8_t *d, const uint8_t *s,
96 int width, const uint8_t *palette, int c_x, int c_y)
97 {
98 int i;
99 uint8_t r, g, b, v, bitset = 0;
100
101 /* get cursor position */
102 assert(0 <= c_y && c_y < SM501_HWC_HEIGHT);
103 s += SM501_HWC_WIDTH * c_y / 4; /* 4 pixels per byte */
104 d += c_x * BPP;
105
106 for (i = 0; i < SM501_HWC_WIDTH && c_x + i < width; i++) {
107 /* get pixel value */
108 if (i % 4 == 0) {
109 bitset = ldub_p(s);
110 s++;
111 }
112 v = bitset & 3;
113 bitset >>= 2;
114
115 /* write pixel */
116 if (v) {
117 v--;
118 r = palette[v * 3 + 0];
119 g = palette[v * 3 + 1];
120 b = palette[v * 3 + 2];
121 *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
122 }
123 d += BPP;
124 }
125 }
126
127 #undef DEPTH
128 #undef BPP
129 #undef PIXEL_TYPE
130 #undef PIXEL_NAME
131 #undef BGR_FORMAT
132