1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
|
/* GGI-Driver for MESA
*
* Copyright (C) 1997 Uwe Maurer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* ---------------------------------------------------------------------
* This code was derived from the following source of information:
*
* svgamesa.c and ddsample.c by Brian Paul
*
*/
#include <ggi/mesa/ggimesa.h>
#include <ggi/mesa/ggimesa_int.h>
#define RMASK ((1<<R)-1)
#define GMASK ((1<<G)-1)
#define BMASK ((1<<B)-1)
#define RS (8-R)
#define GS (8-G)
#define BS (8-B)
/**********************************************************************/
/***** Write spans of pixels *****/
/**********************************************************************/
void GGIwrite_ci32_span(const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLuint ci[],
const GLubyte mask[])
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
if (mask)
{
while (n--) {
if (*mask++) *fb=*ci;
fb++;
ci++;
}
}
else
{
while (n--) *fb++ = *ci++;
}
}
void GGIwrite_ci8_span(const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLubyte ci[],
const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
if (mask)
{
while (n--) {
if (*mask++) *fb=*ci;
fb++;
ci++;
}
}
else
{
while (n--) *fb++ = *ci++;
}
}
void GGIwrite_rgba_span(const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLubyte rgba[][4],
const GLubyte mask[])
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
if (mask)
{
while (n--) {
if (*mask++) {
*fb= ((rgba[0][RCOMP]>>RS) << (G+B)) |
((rgba[0][GCOMP]>>GS) << B) |
((rgba[0][BCOMP]>>BS));
}
fb++;
rgba++;
}
}
else
{
while (n--) {
*fb++= ((rgba[0][RCOMP]>>RS) << (G+B)) |
((rgba[0][GCOMP]>>GS) << B)|
((rgba[0][BCOMP]>>BS));
rgba++;
}
}
}
void GGIwrite_rgb_span( const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLubyte rgba[][3],
const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
if (mask)
{
while (n--) {
if (*mask++) {
*fb= ((rgba[0][RCOMP]>>RS) << (G+B)) |
((rgba[0][GCOMP]>>GS) << B) |
((rgba[0][BCOMP]>>BS));
}
fb++;
rgba++;
}
}
else
{
while (n--) {
*fb++= ((rgba[0][RCOMP]>>RS) << (G+B)) |
((rgba[0][GCOMP]>>GS) << B) |
((rgba[0][BCOMP]>>BS));
rgba++;
}
}
}
void GGIwrite_mono_span( const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLubyte mask[])
{
FB_TYPE *fb;
FB_TYPE color;
if (mask)
{
fb=LFB(FB_TYPE,x,FLIP(y));
color=(FB_TYPE) GGICTX->color;
while (n--)
{
if (*mask++) *fb=color;
fb++;
}
}
else
{
ggiDrawHLine(VIS,x,FLIP(y),n);
}
}
/**********************************************************************/
/***** Read spans of pixels *****/
/**********************************************************************/
void GGIread_ci32_span(const GLcontext *ctx,
GLuint n, GLint x, GLint y, GLuint ci[])
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
while (n--)
*ci++=(GLuint)*fb++;
}
void GGIread_rgba_span(const GLcontext *ctx,
GLuint n, GLint x, GLint y,
GLubyte rgba[][4])
{
FB_TYPE *fb=LFB(FB_TYPE,x,FLIP(y));
FB_TYPE color;
while (n--)
{
color=*fb++;
rgba[0][RCOMP] = (GLubyte) (color>>(G+B))<<RS;
rgba[0][GCOMP] = (GLubyte) ((color>>B)& ((1<<G)-1))<<GS;
rgba[0][BCOMP] = (GLubyte) (color & ((1<<B)-1))<<BS;
rgba[0][ACOMP] =0;
rgba++;
}
}
/**********************************************************************/
/***** Write arrays of pixels *****/
/**********************************************************************/
void GGIwrite_ci32_pixels(const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
const GLuint ci[], const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,0,0);
while (n--) {
if (*mask++) *(fb+ *x + FLIP(*y)*GGICTX->width)=*ci;
ci++;
x++;
y++;
}
}
void GGIwrite_mono_pixels(const GLcontext *ctx,
GLuint n,
const GLint x[], const GLint y[],
const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,0,0);
FB_TYPE color=(FB_TYPE) GGICTX->color;
while (n--) {
if (*mask++) *(fb+ *x + FLIP(*y)*GGICTX->width)=color;
x++;
y++;
}
}
void GGIwrite_rgba_pixels(const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
const GLubyte rgba[][4],
const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,0,0);
FB_TYPE color;
while (n--) {
if (*mask++) {
color= ((rgba[0][RCOMP]>>RS) << (G+B)) |
((rgba[0][GCOMP]>>GS) << B) |
((rgba[0][BCOMP]>>BS));
*(fb+ *x + FLIP(*y)*GGICTX->width)=color;
}
x++;y++;
rgba++;
}
}
/**********************************************************************/
/***** Read arrays of pixels *****/
/**********************************************************************/
void GGIread_ci32_pixels(const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
GLuint ci[], const GLubyte mask[])
{
FB_TYPE *fb=LFB(FB_TYPE,0,0);
while (n--) {
if (*mask++)
*ci=*(fb+ *x + FLIP(*y)*GGICTX->width);
ci++;
x++;
y++;
}
}
void GGIread_rgba_pixels(const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
GLubyte rgba[][4],
const GLubyte mask[] )
{
FB_TYPE *fb=LFB(FB_TYPE,0,0);
FB_TYPE color;
while (n--)
{
if (*mask++)
{
color=*(fb+ *x + FLIP(*y)*GGICTX->width);
rgba[0][RCOMP] =(GLubyte)(color>>(G+B))<<RS;
rgba[0][GCOMP] =(GLubyte)((color>>B)& ((1<<G)-1))<<GS;
rgba[0][BCOMP] =(GLubyte) (color & ((1<<B)-1))<<BS;
rgba[0][ACOMP] =0;
}
x++; y++;
rgba++;
}
}
int GGIsetup_driver(GGIMesaContext ggictx, struct ggi_mesa_info *info)
{
GLcontext *ctx = ggictx->gl_ctx;
ctx->Driver.WriteRGBASpan = GGIwrite_rgba_span;
ctx->Driver.WriteRGBSpan = GGIwrite_rgb_span;
// ctx->Driver.WriteMonoRGBASpan = GGIwrite_mono_span;
ctx->Driver.WriteRGBAPixels = GGIwrite_rgba_pixels;
// ctx->Driver.WriteMonoRGBAPixels = GGIwrite_mono_pixels;
ctx->Driver.WriteCI32Span = GGIwrite_ci32_span;
ctx->Driver.WriteCI8Span = GGIwrite_ci8_span;
// ctx->Driver.WriteMonoCISpan = GGIwrite_mono_span;
ctx->Driver.WriteCI32Pixels = GGIwrite_ci32_pixels;
// ctx->Driver.WriteMonoCIPixels = GGIwrite_mono_pixels;
ctx->Driver.ReadCI32Span = GGIread_ci32_span;
ctx->Driver.ReadRGBASpan = GGIread_rgba_span;
ctx->Driver.ReadCI32Pixels = GGIread_ci32_pixels;
ctx->Driver.ReadRGBAPixels = GGIread_rgba_pixels;
info->red_bits = R;
info->green_bits =G;
info->blue_bits = B;
return 0;
}
static int GGIopen(ggi_visual_t vis,struct ggi_dlhandle *dlh,
const char *args,void *argptr, uint32 *dlret)
{
LIBGGI_MESAEXT(vis)->setup_driver=GGIsetup_driver;
*dlret = GGI_DL_OPDRAW;
return 0;
}
int DLOPENFUNC(int func, void **funcptr)
{
switch (func) {
case GGIFUNC_open:
*funcptr = GGIopen;
return 0;
case GGIFUNC_exit:
case GGIFUNC_close:
*funcptr = NULL;
return 0;
default:
*funcptr = NULL;
}
return GGI_ENOTFOUND;
}
|
