src/gallium/state_trackers/xorg/xorg_dri2.c

   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
  37 #include "dri2.h"
  38
  39 #include "pipe/p_state.h"
  40 #include "pipe/p_inlines.h"
  41
  42 #include "util/u_rect.h"
  43
  44 typedef struct {
  45     PixmapPtr pPixmap;
  46     struct pipe_texture *tex;
  47     struct pipe_fence_handle *fence;
  48 } *BufferPrivatePtr;
  49
  50 static DRI2BufferPtr
  51 driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
  52 {
  53     struct pipe_texture *depth, *tex;
  54     struct pipe_buffer *buf;
  55     ScreenPtr pScreen = pDraw->pScreen;
  56     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  57     modesettingPtr ms = modesettingPTR(pScrn);
  58     BufferPrivatePtr privates;
  59     DRI2BufferPtr buffers;
  60     PixmapPtr pPixmap;
  61     unsigned stride, handle;
  62     boolean have_depth = FALSE, have_stencil = FALSE;
  63     int i;
  64
  65     buffers = xcalloc(count, sizeof *buffers);
  66     if (!buffers)
  67         goto fail_buffers;
  68
  69     privates = xcalloc(count, sizeof *privates);
  70     if (!privates)
  71         goto fail_privates;
  72
  73     for (i = 0; i < count; i++) {
  74         if (attachments[i] == DRI2BufferDepth)
  75             have_depth = TRUE;
  76         else if (attachments[i] == DRI2BufferStencil)
  77             have_stencil = TRUE;
  78     }
  79
  80     if (have_stencil && !have_depth)
  81         FatalError("Doesn't support only stencil yet\n");
  82
  83     depth = NULL;
  84     for (i = 0; i < count; i++) {
  85         pPixmap = NULL;
  86         tex = NULL;
  87         buf = NULL;
  88         if (attachments[i] == DRI2BufferFrontLeft) {
  89             if (pDraw->type == DRAWABLE_PIXMAP)
  90                 pPixmap = (PixmapPtr) pDraw;
  91             else
  92                 pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  93             pPixmap->refcnt++;
  94         } else if (attachments[i] == DRI2BufferStencil) {
  95             pipe_texture_reference(&tex, depth);
  96         } else if (attachments[i] == DRI2BufferDepth) {
  97             struct pipe_texture template;
  98             memset(&template, 0, sizeof(template));
  99             template.target = PIPE_TEXTURE_2D;
 100             if (have_stencil)
 101                 template.format = ms->ds_depth_bits_last ?
 102                     PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 103             else
 104                 template.format = ms->d_depth_bits_last ?
 105                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 106             pf_get_block(template.format, &template.block);
 107             template.width[0] = pDraw->width;
 108             template.height[0] = pDraw->height;
 109             template.depth[0] = 1;
 110             template.last_level = 0;
 111             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 112                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 113             tex = ms->screen->texture_create(ms->screen, &template);
 114             depth = tex;
 115         } else if (attachments[i] == DRI2BufferFakeFrontLeft &&
 116                    pDraw->type == DRAWABLE_PIXMAP) {
 117             pPixmap = (PixmapPtr) pDraw;
 118             pPixmap->refcnt++;
 119         } else {
 120             pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
 121                                                pDraw->height,
 122                                                pDraw->depth,
 123                                                0);
 124         }
 125
 126         if (pPixmap) {
 127             xorg_exa_set_shared_usage(pPixmap);
 128             pScreen->ModifyPixmapHeader(pPixmap, 0, 0, 0, 0, 0, NULL);
 129             tex = xorg_exa_get_texture(pPixmap);
 130         }
 131
 132         if (!tex)
 133                 FatalError("NO TEXTURE IN DRI2\n");
 134
 135         ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 136
 137         buffers[i].name = handle;
 138         buffers[i].attachment = attachments[i];
 139         buffers[i].pitch = stride;
 140         buffers[i].cpp = 4;
 141         buffers[i].driverPrivate = &privates[i];
 142         buffers[i].flags = 0; /* not tiled */
 143         privates[i].pPixmap = pPixmap;
 144         privates[i].tex = tex;
 145     }
 146
 147     return buffers;
 148
 149 fail_privates:
 150     xfree(buffers);
 151 fail_buffers:
 152     return NULL;
 153 }
 154
 155 static void
 156 driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 157 {
 158     ScreenPtr pScreen = pDraw->pScreen;
 159     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 160     modesettingPtr ms = modesettingPTR(pScrn);
 161     BufferPrivatePtr private;
 162     int i;
 163     (void)ms;
 164
 165     for (i = 0; i < count; i++) {
 166         private = buffers[i].driverPrivate;
 167
 168         pipe_texture_reference(&private->tex, NULL);
 169         ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 170
 171         if (private->pPixmap)
 172             (*pScreen->DestroyPixmap)(private->pPixmap);
 173     }
 174
 175     if (buffers) {
 176         xfree(buffers[0].driverPrivate);
 177         xfree(buffers);
 178     }
 179 }
 180
 181 static void
 182 driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
 183               DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 184 {
 185     ScreenPtr pScreen = pDraw->pScreen;
 186     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 187     modesettingPtr ms = modesettingPTR(pScrn);
 188     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 189     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 190     PixmapPtr src_pixmap;
 191     PixmapPtr dst_pixmap;
 192     GCPtr gc;
 193     RegionPtr copy_clip;
 194
 195     /*
 196      * In driCreateBuffers we dewrap windows into the
 197      * backing pixmaps in order to get to the texture.
 198      * We need to use the real drawable in CopyArea
 199      * so that cliprects and offsets are correct.
 200      */
 201     src_pixmap = src_priv->pPixmap;
 202     dst_pixmap = dst_priv->pPixmap;
 203     if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
 204         src_pixmap = (PixmapPtr)pDraw;
 205     if (pDestBuffer->attachment == DRI2BufferFrontLeft)
 206         dst_pixmap = (PixmapPtr)pDraw;
 207
 208     /*
 209      * The clients implements glXWaitX with a copy front to fake and then
 210      * waiting on the server to signal its completion of it. While
 211      * glXWaitGL is a client side flush and a copy from fake to front.
 212      * This is how it is done in the DRI2 protocol, how ever depending
 213      * which type of drawables the server does things a bit differently
 214      * then what the protocol says as the fake and front are the same.
 215      *
 216      * for pixmaps glXWaitX is a server flush.
 217      * for pixmaps glXWaitGL is a client flush.
 218      * for windows glXWaitX is a copy from front to fake then a server flush.
 219      * for windows glXWaitGL is a client flush then a copy from fake to front.
 220      *
 221      * XXX in the windows case this code always flushes but that isn't a
 222      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 223      * or a glFlush/glFinish call.
 224      */
 225     if (dst_pixmap == src_pixmap) {
 226         /* pixmap glXWaitX */
 227         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 228             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 229             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 230             return;
 231         }
 232         /* pixmap glXWaitGL */
 233         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 234             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 235             return;
 236         } else {
 237             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 238                 "copying between the same pixmap\n");
 239         }
 240     }
 241
 242     gc = GetScratchGC(pDraw->depth, pScreen);
 243     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 244     REGION_COPY(pScreen, copy_clip, pRegion);
 245     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 246     ValidateGC(&dst_pixmap->drawable, gc);
 247
 248     /* If this is a full buffer swap, throttle on the previous one */
 249     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 250         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 251
 252         if (extents->x1 == 0 && extents->y1 == 0 &&
 253             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 254             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 255             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 256         }
 257     }
 258
 259     (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
 260                          0, 0, pDraw->width, pDraw->height, 0, 0);
 261
 262     FreeScratchGC(gc);
 263
 264     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 265                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 266                    &dst_priv->fence : NULL);
 267 }
 268
 269 Bool
 270 driScreenInit(ScreenPtr pScreen)
 271 {
 272     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 273     modesettingPtr ms = modesettingPTR(pScrn);
 274     DRI2InfoRec dri2info;
 275
 276     dri2info.version = 1;
 277     dri2info.fd = ms->fd;
 278
 279     dri2info.driverName = pScrn->driverName;
 280     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 281
 282     dri2info.CreateBuffers = driCreateBuffers;
 283     dri2info.DestroyBuffers = driDestroyBuffers;
 284     dri2info.CopyRegion = driCopyRegion;
 285
 286     ms->d_depth_bits_last =
 287          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 288                                          PIPE_TEXTURE_2D,
 289                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 290     ms->ds_depth_bits_last =
 291          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 292                                          PIPE_TEXTURE_2D,
 293                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 294
 295     return DRI2ScreenInit(pScreen, &dri2info);
 296 }
 297
 298 void
 299 driCloseScreen(ScreenPtr pScreen)
 300 {
 301     DRI2CloseScreen(pScreen);
 302 }
 303
 304 /* vim: set sw=4 ts=8 sts=4: */