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_buffer *buf;
  48     struct pipe_fence_handle *fence;
  49 } *BufferPrivatePtr;
  50
  51 static DRI2BufferPtr
  52 driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
  53 {
  54     struct pipe_texture *depth, *tex;
  55     struct pipe_buffer *buf;
  56     ScreenPtr pScreen = pDraw->pScreen;
  57     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  58     modesettingPtr ms = modesettingPTR(pScrn);
  59     BufferPrivatePtr privates;
  60     DRI2BufferPtr buffers;
  61     PixmapPtr pPixmap;
  62     unsigned stride, handle;
  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     depth = NULL;
  74     for (i = 0; i < count; i++) {
  75         pPixmap = NULL;
  76         tex = NULL;
  77         buf = NULL;
  78         if (attachments[i] == DRI2BufferFrontLeft) {
  79             if (pDraw->type == DRAWABLE_PIXMAP)
  80                 pPixmap = (PixmapPtr) pDraw;
  81             else
  82                 pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  83             pPixmap->refcnt++;
  84             tex = xorg_exa_get_texture(pPixmap);
  85         } else if (attachments[i] == DRI2BufferStencil) {
  86             pipe_texture_reference(&tex, depth);
  87         } else if (attachments[i] == DRI2BufferDepth) {
  88             struct pipe_texture template;
  89             memset(&template, 0, sizeof(template));
  90             template.target = PIPE_TEXTURE_2D;
  91             template.format = PIPE_FORMAT_S8Z24_UNORM;
  92             pf_get_block(template.format, &template.block);
  93             template.width[0] = pDraw->width;
  94             template.height[0] = pDraw->height;
  95             template.depth[0] = 1;
  96             template.last_level = 0;
  97             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
  98             tex = ms->screen->texture_create(ms->screen, &template);
  99             depth = tex;
 100         } else if (attachments[i] == DRI2BufferFakeFrontLeft &&
 101                    pDraw->type == DRAWABLE_PIXMAP) {
 102             pPixmap = (PixmapPtr) pDraw;
 103             pPixmap->refcnt++;
 104             tex = xorg_exa_get_texture(pPixmap);
 105         } else {
 106             pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
 107                                                pDraw->height,
 108                                                pDraw->depth,
 109                                                0);
 110             tex = xorg_exa_get_texture(pPixmap);
 111         }
 112
 113         if (!tex)
 114                 FatalError("NO TEXTURE IN DRI2\n");
 115
 116         ms->api->buffer_from_texture(ms->api, tex, &buf, &stride);
 117         ms->api->global_handle_from_buffer(ms->api, ms->screen, buf, &handle);
 118
 119         buffers[i].name = handle;
 120         buffers[i].attachment = attachments[i];
 121         buffers[i].pitch = stride;
 122         buffers[i].cpp = 4;
 123         buffers[i].driverPrivate = &privates[i];
 124         buffers[i].flags = 0; /* not tiled */
 125         privates[i].pPixmap = pPixmap;
 126         privates[i].buf = buf;
 127         privates[i].tex = tex;
 128     }
 129
 130     return buffers;
 131
 132 fail_privates:
 133     xfree(buffers);
 134 fail_buffers:
 135     return NULL;
 136 }
 137
 138 static void
 139 driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 140 {
 141     ScreenPtr pScreen = pDraw->pScreen;
 142     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 143     modesettingPtr ms = modesettingPTR(pScrn);
 144     BufferPrivatePtr private;
 145     int i;
 146     (void)ms;
 147
 148     for (i = 0; i < count; i++) {
 149         private = buffers[i].driverPrivate;
 150
 151         pipe_texture_reference(&private->tex, NULL);
 152         pipe_buffer_reference(&private->buf, NULL);
 153         ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 154
 155         if (private->pPixmap)
 156             (*pScreen->DestroyPixmap)(private->pPixmap);
 157     }
 158
 159     if (buffers) {
 160         xfree(buffers[0].driverPrivate);
 161         xfree(buffers);
 162     }
 163 }
 164
 165 static void
 166 driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
 167               DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 168 {
 169     ScreenPtr pScreen = pDraw->pScreen;
 170     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 171     modesettingPtr ms = modesettingPTR(pScrn);
 172     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 173     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 174     PixmapPtr src_pixmap;
 175     PixmapPtr dst_pixmap;
 176     GCPtr gc;
 177     RegionPtr copy_clip;
 178
 179     /*
 180      * In driCreateBuffers we dewrap windows into the
 181      * backing pixmaps in order to get to the texture.
 182      * We need to use the real drawable in CopyArea
 183      * so that cliprects and offsets are correct.
 184      */
 185     src_pixmap = src_priv->pPixmap;
 186     dst_pixmap = dst_priv->pPixmap;
 187     if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
 188         src_pixmap = (PixmapPtr)pDraw;
 189     if (pDestBuffer->attachment == DRI2BufferFrontLeft)
 190         dst_pixmap = (PixmapPtr)pDraw;
 191
 192     /*
 193      * The clients implements glXWaitX with a copy front to fake and then
 194      * waiting on the server to signal its completion of it. While
 195      * glXWaitGL is a client side flush and a copy from fake to front.
 196      * This is how it is done in the DRI2 protocol, how ever depending
 197      * which type of drawables the server does things a bit differently
 198      * then what the protocol says as the fake and front are the same.
 199      *
 200      * for pixmaps glXWaitX is a server flush.
 201      * for pixmaps glXWaitGL is a client flush.
 202      * for windows glXWaitX is a copy from front to fake then a server flush.
 203      * for windows glXWaitGL is a client flush then a copy from fake to front.
 204      *
 205      * XXX in the windows case this code always flushes but that isn't a
 206      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 207      * or a glFlush/glFinish call.
 208      */
 209     if (dst_pixmap == src_pixmap) {
 210         /* pixmap glXWaitX */
 211         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 212             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 213             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 214             return;
 215         }
 216         /* pixmap glXWaitGL */
 217         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 218             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 219             return;
 220         } else {
 221             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 222                 "copying between the same pixmap\n");
 223         }
 224     }
 225
 226     gc = GetScratchGC(pDraw->depth, pScreen);
 227     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 228     REGION_COPY(pScreen, copy_clip, pRegion);
 229     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 230     ValidateGC(&dst_pixmap->drawable, gc);
 231
 232     /* If this is a full buffer swap, throttle on the previous one */
 233     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 234         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 235
 236         if (extents->x1 == 0 && extents->y1 == 0 &&
 237             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 238             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 239             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 240         }
 241     }
 242
 243     (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
 244                          0, 0, pDraw->width, pDraw->height, 0, 0);
 245
 246     FreeScratchGC(gc);
 247
 248     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 249                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 250                    &dst_priv->fence : NULL);
 251 }
 252
 253 Bool
 254 driScreenInit(ScreenPtr pScreen)
 255 {
 256     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 257     modesettingPtr ms = modesettingPTR(pScrn);
 258     DRI2InfoRec dri2info;
 259
 260     dri2info.version = 1;
 261     dri2info.fd = ms->fd;
 262 #if 0
 263     dri2info.driverName = pScrn->name;
 264 #else
 265     dri2info.driverName = "i915"; /* FIXME */
 266 #endif
 267     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 268
 269     dri2info.CreateBuffers = driCreateBuffers;
 270     dri2info.DestroyBuffers = driDestroyBuffers;
 271     dri2info.CopyRegion = driCopyRegion;
 272
 273     return DRI2ScreenInit(pScreen, &dri2info);
 274 }
 275
 276 void
 277 driCloseScreen(ScreenPtr pScreen)
 278 {
 279     DRI2CloseScreen(pScreen);
 280 }
 281
 282 /* vim: set sw=4 ts=8 sts=4: */