xorg_dri2.c revision d509f84543d0979e9bb53c20c195f378dd61e728 
1/*
2 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 *
26 * Author: Alan Hourihane <alanh@tungstengraphics.com>
27 * Author: Jakob Bornecrantz <wallbraker@gmail.com>
28 *
29 */
30
31#include "xorg-server.h"
32#include "xf86.h"
33#include "xf86_OSproc.h"
34
35#include "xorg_tracker.h"
36#include "xorg_exa.h"
37
38#include "dri2.h"
39
40#include "pipe/p_state.h"
41#include "pipe/p_inlines.h"
42
43#include "util/u_rect.h"
44
45typedef struct {
46    PixmapPtr pPixmap;
47    struct pipe_texture *tex;
48    struct pipe_fence_handle *fence;
49} *BufferPrivatePtr;
50
51static Bool
52driDoCreateBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
53{
54    struct pipe_texture *tex = NULL;
55    ScreenPtr pScreen = pDraw->pScreen;
56    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
57    modesettingPtr ms = modesettingPTR(pScrn);
58    struct exa_pixmap_priv *exa_priv;
59    BufferPrivatePtr private = buffer->driverPrivate;
60    PixmapPtr pPixmap;
61    unsigned stride, handle;
62
63    if (pDraw->type == DRAWABLE_PIXMAP)
64	pPixmap = (PixmapPtr) pDraw;
65    else
66	pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
67    exa_priv = exaGetPixmapDriverPrivate(pPixmap);
68
69    switch (buffer->attachment) {
70    default:
71	if (buffer->attachment != DRI2BufferFakeFrontLeft ||
72	    pDraw->type != DRAWABLE_PIXMAP) {
73	    private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
74							pDraw->height,
75							pDraw->depth,
76							0);
77	}
78	break;
79    case DRI2BufferFrontLeft:
80	break;
81    case DRI2BufferStencil:
82#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
83    case DRI2BufferDepthStencil:
84#else
85    /* Works on old X servers because sanity checking is for the weak */
86    case 9:
87#endif
88	if (exa_priv->depth_stencil_tex &&
89	    !pf_is_depth_stencil(exa_priv->depth_stencil_tex->format))
90	    exa_priv->depth_stencil_tex = NULL;
91        /* Fall through */
92    case DRI2BufferDepth:
93	if (exa_priv->depth_stencil_tex)
94	    pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
95        else {
96	    struct pipe_texture template;
97	    memset(&template, 0, sizeof(template));
98	    template.target = PIPE_TEXTURE_2D;
99	    if (buffer->attachment == DRI2BufferDepth)
100		template.format = ms->ds_depth_bits_last ?
101		    PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
102	    else
103		template.format = ms->ds_depth_bits_last ?
104		    PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
105	    pf_get_block(template.format, &template.block);
106	    template.width0 = pDraw->width;
107	    template.height0 = pDraw->height;
108	    template.depth0 = 1;
109	    template.last_level = 0;
110	    template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
111		PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
112	    tex = ms->screen->texture_create(ms->screen, &template);
113	    pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
114	}
115	break;
116    }
117
118    if (!private->pPixmap) {
119	private->pPixmap = pPixmap;
120	pPixmap->refcnt++;
121    }
122
123    if (!tex) {
124	exaMoveInPixmap(private->pPixmap);
125	xorg_exa_set_shared_usage(private->pPixmap);
126	pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
127	tex = xorg_exa_get_texture(private->pPixmap);
128    }
129
130    if (!tex)
131	FatalError("NO TEXTURE IN DRI2\n");
132
133    ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
134
135    buffer->name = handle;
136    buffer->pitch = stride;
137    buffer->cpp = 4;
138    buffer->driverPrivate = private;
139    buffer->flags = 0; /* not tiled */
140    private->tex = tex;
141
142    return TRUE;
143}
144
145static void
146driDoDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
147{
148    ScreenPtr pScreen = pDraw->pScreen;
149    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
150    modesettingPtr ms = modesettingPTR(pScrn);
151    BufferPrivatePtr private = buffer->driverPrivate;
152    struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
153
154    pipe_texture_reference(&private->tex, NULL);
155    ms->screen->fence_reference(ms->screen, &private->fence, NULL);
156    pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
157    (*pScreen->DestroyPixmap)(private->pPixmap);
158}
159
160#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
161
162static DRI2BufferPtr
163driCreateBuffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
164{
165    DRI2BufferPtr buffer;
166    BufferPrivatePtr private;
167
168    buffer = xcalloc(1, sizeof *buffer);
169    if (!buffer)
170	return NULL;
171
172    private = xcalloc(1, sizeof *private);
173    if (!private) {
174	goto fail;
175    }
176
177    buffer->attachment = attachment;
178    buffer->driverPrivate = private;
179
180    if (driDoCreateBuffer(pDraw, buffer, format))
181	return buffer;
182
183    xfree(private);
184fail:
185    xfree(buffer);
186    return NULL;
187}
188
189static void
190driDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
191{
192    driDoDestroyBuffer(pDraw, buffer);
193
194    xfree(buffer->driverPrivate);
195    xfree(buffer);
196}
197
198#else /* DRI2INFOREC_VERSION <= 2 */
199
200static DRI2BufferPtr
201driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
202{
203    BufferPrivatePtr privates;
204    DRI2BufferPtr buffers;
205    int i;
206
207    buffers = xcalloc(count, sizeof *buffers);
208    if (!buffers)
209	goto fail_buffers;
210
211    privates = xcalloc(count, sizeof *privates);
212    if (!privates)
213	goto fail_privates;
214
215    for (i = 0; i < count; i++) {
216	buffers[i].attachment = attachments[i];
217	buffers[i].driverPrivate = &privates[i];
218
219	if (!driDoCreateBuffer(pDraw, &buffers[i], 0))
220	    goto fail;
221    }
222
223    return buffers;
224
225fail:
226    xfree(privates);
227fail_privates:
228    xfree(buffers);
229fail_buffers:
230    return NULL;
231}
232
233static void
234driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
235{
236    int i;
237
238    for (i = 0; i < count; i++) {
239	driDoDestroyBuffer(pDraw, &buffers[i]);
240    }
241
242    if (buffers) {
243	xfree(buffers[0].driverPrivate);
244	xfree(buffers);
245    }
246}
247
248#endif /* DRI2INFOREC_VERSION */
249
250static void
251driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
252              DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
253{
254    ScreenPtr pScreen = pDraw->pScreen;
255    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
256    modesettingPtr ms = modesettingPTR(pScrn);
257    BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
258    BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
259    PixmapPtr src_pixmap;
260    PixmapPtr dst_pixmap;
261    GCPtr gc;
262    RegionPtr copy_clip;
263
264    /*
265     * In driCreateBuffers we dewrap windows into the
266     * backing pixmaps in order to get to the texture.
267     * We need to use the real drawable in CopyArea
268     * so that cliprects and offsets are correct.
269     */
270    src_pixmap = src_priv->pPixmap;
271    dst_pixmap = dst_priv->pPixmap;
272    if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
273	src_pixmap = (PixmapPtr)pDraw;
274    if (pDestBuffer->attachment == DRI2BufferFrontLeft)
275	dst_pixmap = (PixmapPtr)pDraw;
276
277    /*
278     * The clients implements glXWaitX with a copy front to fake and then
279     * waiting on the server to signal its completion of it. While
280     * glXWaitGL is a client side flush and a copy from fake to front.
281     * This is how it is done in the DRI2 protocol, how ever depending
282     * which type of drawables the server does things a bit differently
283     * then what the protocol says as the fake and front are the same.
284     *
285     * for pixmaps glXWaitX is a server flush.
286     * for pixmaps glXWaitGL is a client flush.
287     * for windows glXWaitX is a copy from front to fake then a server flush.
288     * for windows glXWaitGL is a client flush then a copy from fake to front.
289     *
290     * XXX in the windows case this code always flushes but that isn't a
291     * must in the glXWaitGL case but we don't know if this is a glXWaitGL
292     * or a glFlush/glFinish call.
293     */
294    if (dst_pixmap == src_pixmap) {
295	/* pixmap glXWaitX */
296	if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
297	    pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
298	    ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
299	    return;
300	}
301	/* pixmap glXWaitGL */
302	if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
303	    pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
304	    return;
305	} else {
306	    xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
307		"copying between the same pixmap\n");
308	}
309    }
310
311    gc = GetScratchGC(pDraw->depth, pScreen);
312    copy_clip = REGION_CREATE(pScreen, NULL, 0);
313    REGION_COPY(pScreen, copy_clip, pRegion);
314    (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
315    ValidateGC(&dst_pixmap->drawable, gc);
316
317    /* If this is a full buffer swap, throttle on the previous one */
318    if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
319	BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
320
321	if (extents->x1 == 0 && extents->y1 == 0 &&
322	    extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
323	    ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
324	    ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
325	}
326    }
327
328    (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
329			 0, 0, pDraw->width, pDraw->height, 0, 0);
330
331    FreeScratchGC(gc);
332
333    ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
334		   pDestBuffer->attachment == DRI2BufferFrontLeft ?
335		   &dst_priv->fence : NULL);
336}
337
338Bool
339driScreenInit(ScreenPtr pScreen)
340{
341    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
342    modesettingPtr ms = modesettingPTR(pScrn);
343    DRI2InfoRec dri2info;
344
345#if defined(DRI2INFOREC_VERSION)
346    dri2info.version = DRI2INFOREC_VERSION;
347#else
348    dri2info.version = 1;
349#endif
350    dri2info.fd = ms->fd;
351
352    dri2info.driverName = pScrn->driverName;
353    dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
354
355#if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
356    dri2info.CreateBuffer = driCreateBuffer;
357    dri2info.DestroyBuffer = driDestroyBuffer;
358#else
359    dri2info.CreateBuffers = driCreateBuffers;
360    dri2info.DestroyBuffers = driDestroyBuffers;
361#endif
362    dri2info.CopyRegion = driCopyRegion;
363    dri2info.Wait = NULL;
364
365    ms->d_depth_bits_last =
366	 ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
367					 PIPE_TEXTURE_2D,
368					 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
369    ms->ds_depth_bits_last =
370	 ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
371					 PIPE_TEXTURE_2D,
372					 PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
373
374    return DRI2ScreenInit(pScreen, &dri2info);
375}
376
377void
378driCloseScreen(ScreenPtr pScreen)
379{
380    DRI2CloseScreen(pScreen);
381}
382
383/* vim: set sw=4 ts=8 sts=4: */
384