a2524e052c2e78eed330f998be3d20168ff00100
2 * Mesa 3-D graphics library
5 * Copyright (C) 1999 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * DOS/DJGPP device driver v1.3 for Mesa
28 * Copyright (C) 2002 - Borca Daniel
29 * Email : dborca@yahoo.com
30 * Web : http://www.geocities.com/dborca
32 * Thanks to CrazyPyro (Neil Funk) for FakeColor
45 static vl_driver
*drv
;
46 /* based upon mode specific data: valid entire session */
47 int vl_video_selector
;
48 static vl_mode
*video_mode
;
49 static int video_scanlen
, video_bypp
;
50 /* valid until next buffer */
51 void *vl_current_draw_buffer
, *vl_current_read_buffer
;
52 int vl_current_stride
, vl_current_width
, vl_current_height
, vl_current_bytes
;
53 int vl_current_offset
, vl_current_delta
;
57 /* lookup table for scaling 5 bit colors up to 8 bits */
58 static int _rgb_scale_5
[32] = {
59 0, 8, 16, 25, 33, 41, 49, 58,
60 66, 74, 82, 90, 99, 107, 115, 123,
61 132, 140, 148, 156, 165, 173, 181, 189,
62 197, 206, 214, 222, 230, 239, 247, 255
65 /* lookup table for scaling 6 bit colors up to 8 bits */
66 static int _rgb_scale_6
[64] = {
67 0, 4, 8, 12, 16, 20, 24, 28,
68 32, 36, 40, 45, 49, 53, 57, 61,
69 65, 69, 73, 77, 81, 85, 89, 93,
70 97, 101, 105, 109, 113, 117, 121, 125,
71 130, 134, 138, 142, 146, 150, 154, 158,
72 162, 166, 170, 174, 178, 182, 186, 190,
73 194, 198, 202, 206, 210, 215, 219, 223,
74 227, 231, 235, 239, 243, 247, 251, 255
86 static word32 VGAPalette
[256];
87 static word8 array_r
[256];
88 static word8 array_g
[256];
89 static word8 array_b
[256];
93 int (*vl_mixfix
) (fixed r
, fixed g
, fixed b
);
94 int (*vl_mixrgb
) (const unsigned char rgb
[]);
95 int (*vl_mixrgba
) (const unsigned char rgba
[]);
96 void (*vl_getrgba
) (unsigned int offset
, unsigned char rgba
[4]);
97 int (*vl_getpixel
) (unsigned int offset
);
98 void (*vl_clear
) (int color
);
99 void (*vl_rect
) (int x
, int y
, int width
, int height
, int color
);
100 void (*vl_flip
) (void);
101 void (*vl_putpixel
) (unsigned int offset
, int color
);
105 /* Desc: color composition (w/o ALPHA)
112 static int vl_mixfix8fake (fixed r
, fixed g
, fixed b
)
114 return array_b
[b
>>FIXED_SHIFT
]*G_CNT
*R_CNT
115 + array_g
[g
>>FIXED_SHIFT
]*R_CNT
116 + array_r
[r
>>FIXED_SHIFT
];
118 #define vl_mixfix8 vl_mixfix8fake
119 static int vl_mixfix15 (fixed r
, fixed g
, fixed b
)
121 return ((r
>>(3+FIXED_SHIFT
))<<10)
122 |((g
>>(3+FIXED_SHIFT
))<<5)
123 |(b
>>(3+FIXED_SHIFT
));
125 static int vl_mixfix16 (fixed r
, fixed g
, fixed b
)
127 return ((r
>>(3+FIXED_SHIFT
))<<11)
128 |((g
>>(2+FIXED_SHIFT
))<<5)
129 |(b
>>(3+FIXED_SHIFT
));
131 #define vl_mixfix24 vl_mixfix32
132 static int vl_mixfix32 (fixed r
, fixed g
, fixed b
)
134 return ((r
>>FIXED_SHIFT
)<<16)
135 |((g
>>FIXED_SHIFT
)<<8)
141 /* Desc: color composition (w/ ALPHA)
143 * In : array of integers (R, G, B, A)
148 #define vl_mixrgba8 vl_mixrgb8fake
149 #define vl_mixrgba15 vl_mixrgb15
150 #define vl_mixrgba16 vl_mixrgb16
151 #define vl_mixrgba24 vl_mixrgb24
152 static int vl_mixrgba32 (const unsigned char rgba
[])
154 return (rgba
[3]<<24)|(rgba
[0]<<16)|(rgba
[1]<<8)|(rgba
[2]);
159 /* Desc: color composition (w/o ALPHA)
161 * In : array of integers (R, G, B)
166 static int vl_mixrgb8fake (const unsigned char rgba
[])
168 return array_b
[rgba
[2]]*G_CNT
*R_CNT
169 + array_g
[rgba
[1]]*R_CNT
172 #define vl_mixrgb8 vl_mixrgb8fake
173 static int vl_mixrgb15 (const unsigned char rgb
[])
175 return ((rgb
[0]>>3)<<10)|((rgb
[1]>>3)<<5)|(rgb
[2]>>3);
177 static int vl_mixrgb16 (const unsigned char rgb
[])
179 return ((rgb
[0]>>3)<<11)|((rgb
[1]>>2)<<5)|(rgb
[2]>>3);
181 #define vl_mixrgb24 vl_mixrgb32
182 static int vl_mixrgb32 (const unsigned char rgb
[])
184 return (rgb
[0]<<16)|(rgb
[1]<<8)|(rgb
[2]);
189 /* Desc: color decomposition
191 * In : pixel offset, array of integers to hold color components (R, G, B, A)
194 * Note: uses current read buffer
196 static void v_getrgba8fake6 (unsigned int offset
, unsigned char rgba
[])
198 word32 c
= VGAPalette
[((word8
*)vl_current_read_buffer
)[offset
]];
199 rgba
[0] = _rgb_scale_6
[(c
>> 16) & 0x3F];
200 rgba
[1] = _rgb_scale_6
[(c
>> 8) & 0x3F];
201 rgba
[2] = _rgb_scale_6
[c
& 0x3F];
204 static void v_getrgba8fake8 (unsigned int offset
, unsigned char rgba
[])
206 word32 c
= VGAPalette
[((word8
*)vl_current_read_buffer
)[offset
]];
212 #define v_getrgba8 v_getrgba8fake6
213 static void v_getrgba15 (unsigned int offset
, unsigned char rgba
[4])
215 word32 c
= ((word16
*)vl_current_read_buffer
)[offset
];
216 rgba
[0] = _rgb_scale_5
[(c
>> 10) & 0x1F];
217 rgba
[1] = _rgb_scale_5
[(c
>> 5) & 0x1F];
218 rgba
[2] = _rgb_scale_5
[c
& 0x1F];
221 static void v_getrgba16 (unsigned int offset
, unsigned char rgba
[4])
223 word32 c
= ((word16
*)vl_current_read_buffer
)[offset
];
224 rgba
[0] = _rgb_scale_5
[(c
>> 11) & 0x1F];
225 rgba
[1] = _rgb_scale_6
[(c
>> 5) & 0x3F];
226 rgba
[2] = _rgb_scale_5
[c
& 0x1F];
229 static void v_getrgba24 (unsigned int offset
, unsigned char rgba
[4])
231 word32 c
= *(word32
*)((long)vl_current_read_buffer
+offset
*3);
237 static void v_getrgba32 (unsigned int offset
, unsigned char rgba
[4])
239 word32 c
= ((word32
*)vl_current_read_buffer
)[offset
];
248 /* Desc: pixel retrieval
253 * Note: uses current read buffer
255 static int v_getpixel8 (unsigned int offset
)
257 return ((word8
*)vl_current_read_buffer
)[offset
];
259 #define v_getpixel15 v_getpixel16
260 static int v_getpixel16 (unsigned int offset
)
262 return ((word16
*)vl_current_read_buffer
)[offset
];
264 static int v_getpixel24 (unsigned int offset
)
266 return *(word32
*)((long)vl_current_read_buffer
+offset
*3);
268 static int v_getpixel32 (unsigned int offset
)
270 return ((word32
*)vl_current_read_buffer
)[offset
];
275 /* Desc: set one palette entry
277 * In : index, R, G, B
280 * Note: color components are in range [0.0 .. 1.0]
282 void vl_setCI (int index
, float red
, float green
, float blue
)
284 drv
->setCI_f(index
, red
, green
, blue
);
289 /* Desc: set one palette entry
291 * In : color, R, G, B
296 static void fake_setcolor (int c
, int r
, int g
, int b
)
298 VGAPalette
[c
] = 0xff000000 | (r
<<16) | (g
<<8) | b
;
300 drv
->setCI_i(c
, r
, g
, b
);
305 /* Desc: build FakeColor palette
307 * In : CI precision in bits
312 static void fake_buildpalette (int bits
)
314 double c_r
, c_g
, c_b
;
315 int r
, g
, b
, color
= 0;
317 double max
= (1 << bits
) - 1;
319 for (b
=0; b
<B_CNT
; ++b
) {
320 for (g
=0; g
<G_CNT
; ++g
) {
321 for (r
=0; r
<R_CNT
; ++r
) {
322 c_r
= 0.5 + (double)r
*(max
-R_BIAS
)/(R_CNT
-1.) + R_BIAS
;
323 c_g
= 0.5 + (double)g
*(max
-G_BIAS
)/(G_CNT
-1.) + G_BIAS
;
324 c_b
= 0.5 + (double)b
*(max
-B_BIAS
)/(B_CNT
-1.) + B_BIAS
;
325 fake_setcolor(color
++, (int)c_r
, (int)c_g
, (int)c_b
);
330 for (color
=0; color
<256; color
++) {
331 c_r
= (double)color
*R_CNT
/256.;
332 c_g
= (double)color
*G_CNT
/256.;
333 c_b
= (double)color
*B_CNT
/256.;
334 array_r
[color
] = (int)c_r
;
335 array_g
[color
] = (int)c_g
;
336 array_b
[color
] = (int)c_b
;
342 /* Desc: sync buffer with video hardware
344 * In : ptr to old buffer, position, size
349 int vl_sync_buffer (void **buffer
, int x
, int y
, int width
, int height
)
351 if ((width
& 7) || (x
< 0) || (y
< 0) || (x
+width
> video_mode
->xres
) || (y
+height
> video_mode
->yres
)) {
354 void *newbuf
= *buffer
;
356 if ((newbuf
== NULL
) || (vl_current_width
!= width
) || (vl_current_height
!= height
)) {
357 newbuf
= realloc(newbuf
, width
* height
* video_bypp
);
360 if (newbuf
== NULL
) {
364 vl_current_width
= width
;
365 vl_current_height
= height
;
366 vl_current_stride
= vl_current_width
* video_bypp
;
367 vl_current_bytes
= vl_current_stride
* height
;
369 vl_current_offset
= video_scanlen
* y
+ video_bypp
* x
;
370 vl_current_delta
= video_scanlen
- vl_current_stride
;
372 vl_current_draw_buffer
= vl_current_read_buffer
= *buffer
= newbuf
;
379 /* Desc: state retrieval
386 int vl_get (int pname
, int *params
)
389 case VL_GET_SCREEN_SIZE
:
390 params
[0] = video_mode
->xres
;
391 params
[1] = video_mode
->yres
;
394 return drv
->get(pname
, params
);
403 * In : ptr to mode definition
408 static int vl_setup_mode (vl_mode
*p
)
414 #define INITPTR(bpp) \
415 vl_putpixel = v_putpixel##bpp; \
416 vl_getrgba = v_getrgba##bpp; \
417 vl_getpixel = v_getpixel##bpp; \
418 vl_rect = v_rect##bpp; \
419 vl_mixfix = vl_mixfix##bpp; \
420 vl_mixrgb = vl_mixrgb##bpp; \
421 vl_mixrgba = vl_mixrgba##bpp; \
422 vl_clear = _can_mmx() ? v_clear##bpp##_mmx : v_clear##bpp
447 video_bypp
= (p
->bpp
+7)/8;
448 video_scanlen
= p
->scanlen
;
449 vl_video_selector
= p
->sel
;
456 /* Desc: restore to the mode prior to first call to `vl_video_init'.
463 void vl_video_exit (void)
473 * In : xres, yres, bits/pixel, RGB, refresh rate
474 * Out : pixel width in bits if success
478 int vl_video_init (int width
, int height
, int bpp
, int rgb
, int refresh
)
487 } else if (bpp
== 8) {
491 /* initialize hardware */
493 if ((q
=drv
->init()) == NULL
) {
495 if ((q
=drv
->init()) == NULL
) {
500 /* search for a mode that fits our request */
501 for (min
=-1, p
=NULL
; q
->mode
!=0xffff; q
++) {
502 if ((q
->xres
>=width
) && (q
->yres
>=height
) && (q
->bpp
==bpp
)) {
503 if (min
>=(unsigned)(q
->xres
*q
->yres
)) {
504 min
= q
->xres
*q
->yres
;
510 /* setup and enter mode */
511 if ((vl_setup_mode(p
) == 0) && (drv
->entermode(p
, refresh
) == 0)) {
514 drv
->get(VL_GET_CI_PREC
, (int *)(&min
));
515 fake_buildpalette(min
);
517 vl_getrgba
= v_getrgba8fake8
;