summaryrefslogtreecommitdiff
path: root/GL/glx/glxglcore.c
blob: df9be07c00a7bb648d3b8159e593d0c5a46354a7 (plain)
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
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
/**************************************************************************

Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sub license, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

**************************************************************************/

/*
 * Authors:
 *   Kevin E. Martin <kevin@precisioninsight.com>
 *   Brian E. Paul <brian@precisioninsight.com>
 *
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <string.h>

#include <GL/xmesa.h>
#include <GL/internal/glcore.h>
#include <glxserver.h>
#include <glxscreens.h>
#include <glxdrawable.h>
#include <glxcontext.h>
#include <glxutil.h>

#include "glcontextmodes.h"
#include "os.h"

typedef struct __GLXMESAscreen   __GLXMESAscreen;
typedef struct __GLXMESAcontext  __GLXMESAcontext;
typedef struct __GLXMESAdrawable __GLXMESAdrawable;

struct __GLXMESAscreen {
    __GLXscreen   base;
    int           index;
    int		  num_vis;
    XMesaVisual  *xm_vis;
};

struct __GLXMESAcontext {
    __GLXcontext base;
    XMesaContext xmesa;
};

struct __GLXMESAdrawable {
    __GLXdrawable base;
    XMesaBuffer   xm_buf;
};

static XMesaVisual find_mesa_visual(__GLXscreen *screen, VisualID vid);


static void
__glXMesaDrawableDestroy(__GLXdrawable *base)
{
    __GLXMESAdrawable *glxPriv = (__GLXMESAdrawable *) base;

    if (glxPriv->xm_buf != NULL)
      XMesaDestroyBuffer(glxPriv->xm_buf);
    xfree(glxPriv);
}

static GLboolean
__glXMesaDrawableResize(__GLXdrawable *base)
{
    __GLXMESAdrawable *glxPriv = (__GLXMESAdrawable *) base;

    XMesaResizeBuffers(glxPriv->xm_buf);

    return GL_TRUE;
}

static GLboolean
__glXMesaDrawableSwapBuffers(__GLXdrawable *base)
{
    __GLXMESAdrawable *glxPriv = (__GLXMESAdrawable *) base;

    /* This is terrifying: XMesaSwapBuffers() ends up calling CopyArea
     * to do the buffer swap, but this assumes that the server holds
     * the lock and has its context visible.  If another screen uses a
     * DRI driver, that will have installed the DRI enter/leave server
     * functions, which lifts the lock during GLX dispatch.  This is
     * why we need to re-take the lock and swap in the server context
     * before calling XMesaSwapBuffers() here.  /me shakes head. */

    __glXenterServer(GL_FALSE);

    XMesaSwapBuffers(glxPriv->xm_buf);

    __glXleaveServer(GL_FALSE);

    return GL_TRUE;
}


static __GLXdrawable *
__glXMesaScreenCreateDrawable(__GLXscreen *screen,
			      DrawablePtr pDraw,
			      XID drawId,
			      __GLcontextModes *modes)
{
    __GLXMESAdrawable *glxPriv;
    XMesaVisual xm_vis;

    glxPriv = xalloc(sizeof *glxPriv);
    if (glxPriv == NULL)
	return NULL;

    memset(glxPriv, 0, sizeof *glxPriv);

    if (!__glXDrawableInit(&glxPriv->base, screen, pDraw, drawId, modes)) {
        xfree(glxPriv);
	return NULL;
    }

    glxPriv->base.destroy     = __glXMesaDrawableDestroy;
    glxPriv->base.resize      = __glXMesaDrawableResize;
    glxPriv->base.swapBuffers = __glXMesaDrawableSwapBuffers;

    xm_vis = find_mesa_visual(screen, modes->visualID);
    if (xm_vis == NULL) {
	ErrorF("find_mesa_visual returned NULL for visualID = 0x%04x\n",
	       modes->visualID);
	xfree(glxPriv);
	return NULL;
    }

    if (glxPriv->base.type == DRAWABLE_WINDOW) {
	glxPriv->xm_buf = XMesaCreateWindowBuffer(xm_vis, (WindowPtr)pDraw);
    } else {
	glxPriv->xm_buf = XMesaCreatePixmapBuffer(xm_vis, (PixmapPtr)pDraw, 0);
    }

    return &glxPriv->base;
}

static void
__glXMesaContextDestroy(__GLXcontext *baseContext)
{
    __GLXMESAcontext *context = (__GLXMESAcontext *) baseContext;

    XMesaDestroyContext(context->xmesa);
    __glXContextDestroy(&context->base);
    xfree(context);
}

static int
__glXMesaContextMakeCurrent(__GLXcontext *baseContext)

{
    __GLXMESAcontext *context = (__GLXMESAcontext *) baseContext;
    __GLXMESAdrawable *drawPriv = (__GLXMESAdrawable *) context->base.drawPriv;
    __GLXMESAdrawable *readPriv = (__GLXMESAdrawable *) context->base.readPriv;

    return XMesaMakeCurrent2(context->xmesa,
			     drawPriv->xm_buf,
			     readPriv->xm_buf);
}

static int
__glXMesaContextLoseCurrent(__GLXcontext *baseContext)
{
    __GLXMESAcontext *context = (__GLXMESAcontext *) baseContext;

    return XMesaLoseCurrent(context->xmesa);
}

static int
__glXMesaContextCopy(__GLXcontext *baseDst,
		     __GLXcontext *baseSrc,
		     unsigned long mask)
{
    __GLXMESAcontext *dst = (__GLXMESAcontext *) baseDst;
    __GLXMESAcontext *src = (__GLXMESAcontext *) baseSrc;

    return XMesaCopyContext(src->xmesa, dst->xmesa, mask);
}

static int
__glXMesaContextForceCurrent(__GLXcontext *baseContext)
{
    __GLXMESAcontext *context = (__GLXMESAcontext *) baseContext;

    /* GlxSetRenderTables() call for XGL moved in XMesaForceCurrent() */

    return XMesaForceCurrent(context->xmesa);
}

static __GLXcontext *
__glXMesaScreenCreateContext(__GLXscreen *screen,
			     __GLcontextModes *modes,
			     __GLXcontext *baseShareContext)
{
    __GLXMESAcontext *context;
    __GLXMESAcontext *shareContext = (__GLXMESAcontext *) baseShareContext;
    XMesaVisual xm_vis;
    XMesaContext xm_share;

    context = xalloc (sizeof (__GLXMESAcontext));
    if (context == NULL)
	return NULL;

    memset(context, 0, sizeof *context);

    context->base.pGlxScreen = screen;
    context->base.modes      = modes;

    context->base.destroy        = __glXMesaContextDestroy;
    context->base.makeCurrent    = __glXMesaContextMakeCurrent;
    context->base.loseCurrent    = __glXMesaContextLoseCurrent;
    context->base.copy           = __glXMesaContextCopy;
    context->base.forceCurrent   = __glXMesaContextForceCurrent;

    xm_vis = find_mesa_visual(screen, modes->visualID);
    if (!xm_vis) {
	ErrorF("find_mesa_visual returned NULL for visualID = 0x%04x\n",
	       modes->visualID);
	xfree(context);
	return NULL;
    }

    xm_share = shareContext ? shareContext->xmesa : NULL;
    context->xmesa = XMesaCreateContext(xm_vis, xm_share);
    if (!context->xmesa) {
	xfree(context);
	return NULL;
    }

    return &context->base;
}

static void
__glXMesaScreenDestroy(__GLXscreen *screen)
{
    __GLXMESAscreen *mesaScreen = (__GLXMESAscreen *) screen;
    int i;

    if (mesaScreen->xm_vis) {
	for (i = 0; i < mesaScreen->num_vis; i++) {
	    if (mesaScreen->xm_vis[i])
		XMesaDestroyVisual(mesaScreen->xm_vis[i]);
	}

	xfree(mesaScreen->xm_vis);
    }

    __glXScreenDestroy(screen);

    xfree(screen);
}

static XMesaVisual
find_mesa_visual(__GLXscreen *screen, VisualID vid)
{
    __GLXMESAscreen *mesaScreen = (__GLXMESAscreen *) screen;
    const __GLcontextModes *modes;
    unsigned i = 0;

    for ( modes = screen->modes ; modes != NULL ; modes = modes->next ) {
	if ( modes->visualID == vid ) {
	    break;
	}

	i++;
    }

    return (modes != NULL) ? mesaScreen->xm_vis[i] : NULL;
}

static void init_screen_visuals(__GLXMESAscreen *screen)
{
    ScreenPtr pScreen = screen->base.pScreen;
    __GLcontextModes *modes;
    XMesaVisual *pXMesaVisual;
    int *used;
    int i, j, size;

    /* Alloc space for the list of XMesa visuals */
    size = screen->base.numVisuals * sizeof(XMesaVisual);
    pXMesaVisual = (XMesaVisual *) xalloc(size);
    memset(pXMesaVisual, 0, size);

    /* FIXME: Change 'used' to be a array of bits (rather than of ints),
     * FIXME: create a stack array of 8 or 16 bytes.  If 'numVisuals' is less
     * FIXME: than 64 or 128 the stack array can be used instead of calling
     * FIXME: __glXMalloc / __glXFree.  If nothing else, convert 'used' to
     * FIXME: array of bytes instead of ints!
     */
    used = (int *) xalloc(pScreen->numVisuals * sizeof(int));
    memset(used, 0, pScreen->numVisuals * sizeof(int));

    i = 0;
    for ( modes = screen->base.modes; modes != NULL; modes = modes->next ) {
	const int vis_class = _gl_convert_to_x_visual_type( modes->visualType );
	const int nplanes = (modes->rgbBits - modes->alphaBits);
	const VisualPtr pVis = pScreen->visuals;

	for (j = 0; j < pScreen->numVisuals; j++) {
	    if (pVis[j].class     == vis_class &&
		pVis[j].nplanes   == nplanes &&
		pVis[j].redMask   == modes->redMask &&
		pVis[j].greenMask == modes->greenMask &&
		pVis[j].blueMask  == modes->blueMask &&
		!used[j]) {

		/* Create the XMesa visual */
		pXMesaVisual[i] =
		    XMesaCreateVisual(pScreen,
				      &pVis[j],
				      modes->rgbMode,
				      (modes->alphaBits > 0),
				      modes->doubleBufferMode,
				      modes->stereoMode,
				      GL_TRUE, /* ximage_flag */
				      modes->depthBits,
				      modes->stencilBits,
				      modes->accumRedBits,
				      modes->accumGreenBits,
				      modes->accumBlueBits,
				      modes->accumAlphaBits,
				      modes->samples,
				      modes->level,
				      modes->visualRating);
		/* Set the VisualID */
		modes->visualID = pVis[j].vid;

		/* Mark this visual used */
		used[j] = 1;
		break;
	    }
	}

	if ( j == pScreen->numVisuals ) {
	    ErrorF("No matching visual for __GLcontextMode with "
		   "visual class = %d (%d), nplanes = %u\n",
		   vis_class, 
		   modes->visualType,
		   (modes->rgbBits - modes->alphaBits) );
	}
	else if ( modes->visualID == -1 ) {
	    FatalError( "Matching visual found, but visualID still -1!\n" );
	}

	i++;
    }

    xfree(used);

    screen->num_vis = pScreen->numVisuals;
    screen->xm_vis = pXMesaVisual;
}

static __GLXscreen *
__glXMesaScreenProbe(ScreenPtr pScreen)
{
    __GLXMESAscreen *screen;

    screen = xalloc(sizeof *screen);
    if (screen == NULL)
	return NULL;

    __glXScreenInit(&screen->base, pScreen);

    screen->base.destroy        = __glXMesaScreenDestroy;
    screen->base.createContext  = __glXMesaScreenCreateContext;
    screen->base.createDrawable = __glXMesaScreenCreateDrawable;
    screen->base.pScreen       = pScreen;

    /*
     * Find the GLX visuals that are supported by this screen and create
     * XMesa's visuals.
     */
    init_screen_visuals(screen);

    return &screen->base;
}

__GLXprovider __glXMesaProvider = {
    __glXMesaScreenProbe,
    "MESA",
    NULL
};

__GLXprovider *
GlxGetMesaProvider (void)
{
    return &__glXMesaProvider;
}