src/mesa/drivers/dri/r300/radeon_lock.c

   1 /**************************************************************************
   2
   3 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   4                      VA Linux Systems Inc., Fremont, California.
   5 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   6
   7 The Weather Channel (TM) funded Tungsten Graphics to develop the
   8 initial release of the Radeon 8500 driver under the XFree86 license.
   9 This notice must be preserved.
  10
  11 All Rights Reserved.
  12
  13 Permission is hereby granted, free of charge, to any person obtaining
  14 a copy of this software and associated documentation files (the
  15 "Software"), to deal in the Software without restriction, including
  16 without limitation the rights to use, copy, modify, merge, publish,
  17 distribute, sublicense, and/or sell copies of the Software, and to
  18 permit persons to whom the Software is furnished to do so, subject to
  19 the following conditions:
  20
  21 The above copyright notice and this permission notice (including the
  22 next paragraph) shall be included in all copies or substantial
  23 portions of the Software.
  24
  25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  28 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  29 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32
  33 **************************************************************************/
  34
  35 /*
  36  * Authors:
  37  *   Gareth Hughes <gareth@valinux.com>
  38  *   Keith Whitwell <keith@tungstengraphics.com>
  39  *   Kevin E. Martin <martin@valinux.com>
  40  */
  41
  42 #include "radeon_lock.h"
  43 #include "radeon_ioctl.h"
  44 #include "radeon_state.h"
  45 #include "r300_context.h"
  46 #include "r300_state.h"
  47
  48 #include "main/framebuffer.h"
  49
  50 #include "drirenderbuffer.h"
  51
  52 #if DEBUG_LOCKING
  53 char *prevLockFile = NULL;
  54 int prevLockLine = 0;
  55 #endif
  56
  57 /* Turn on/off page flipping according to the flags in the sarea:
  58  */
  59 void radeonUpdatePageFlipping(radeonContextPtr rmesa)
  60 {
  61         int use_back;
  62
  63         rmesa->doPageFlip = rmesa->sarea->pfState;
  64         if (rmesa->glCtx->WinSysDrawBuffer) {
  65                 driFlipRenderbuffers(rmesa->glCtx->WinSysDrawBuffer,
  66                                      rmesa->sarea->pfCurrentPage);
  67                 r300UpdateDrawBuffer(rmesa->glCtx);
  68         }
  69
  70         use_back = rmesa->glCtx->DrawBuffer ?
  71             (rmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0] ==
  72              BUFFER_BACK_LEFT) : 1;
  73         use_back ^= (rmesa->sarea->pfCurrentPage == 1);
  74
  75         if (use_back) {
  76                 rmesa->state.color.drawOffset =
  77                     rmesa->radeonScreen->backOffset;
  78                 rmesa->state.color.drawPitch = rmesa->radeonScreen->backPitch;
  79         } else {
  80                 rmesa->state.color.drawOffset =
  81                     rmesa->radeonScreen->frontOffset;
  82                 rmesa->state.color.drawPitch =
  83                     rmesa->radeonScreen->frontPitch;
  84         }
  85 }
  86
  87 /* Update the hardware state.  This is called if another context has
  88  * grabbed the hardware lock, which includes the X server.  This
  89  * function also updates the driver's window state after the X server
  90  * moves, resizes or restacks a window -- the change will be reflected
  91  * in the drawable position and clip rects.  Since the X server grabs
  92  * the hardware lock when it changes the window state, this routine will
  93  * automatically be called after such a change.
  94  */
  95 void radeonGetLock(radeonContextPtr rmesa, GLuint flags)
  96 {
  97         __DRIdrawablePrivate *const drawable = rmesa->dri.drawable;
  98         __DRIdrawablePrivate *const readable = rmesa->dri.readable;
  99         __DRIscreenPrivate *sPriv = rmesa->dri.screen;
 100         drm_radeon_sarea_t *sarea = rmesa->sarea;
 101         r300ContextPtr r300 = (r300ContextPtr) rmesa;
 102
 103         assert(drawable != NULL);
 104
 105         drmGetLock(rmesa->dri.fd, rmesa->dri.hwContext, flags);
 106
 107         /* The window might have moved, so we might need to get new clip
 108          * rects.
 109          *
 110          * NOTE: This releases and regrabs the hw lock to allow the X server
 111          * to respond to the DRI protocol request for new drawable info.
 112          * Since the hardware state depends on having the latest drawable
 113          * clip rects, all state checking must be done _after_ this call.
 114          */
 115         DRI_VALIDATE_DRAWABLE_INFO(sPriv, drawable);
 116         if (drawable != readable) {
 117                 DRI_VALIDATE_DRAWABLE_INFO(sPriv, readable);
 118         }
 119
 120         if (rmesa->lastStamp != drawable->lastStamp) {
 121                 radeonUpdatePageFlipping(rmesa);
 122                 radeonSetCliprects(rmesa);
 123                 r300UpdateViewportOffset(rmesa->glCtx);
 124                 driUpdateFramebufferSize(rmesa->glCtx, drawable);
 125         }
 126
 127         if (sarea->ctx_owner != rmesa->dri.hwContext) {
 128                 int i;
 129
 130                 sarea->ctx_owner = rmesa->dri.hwContext;
 131                 for (i = 0; i < r300->nr_heaps; i++) {
 132                         DRI_AGE_TEXTURES(r300->texture_heaps[i]);
 133                 }
 134         }
 135
 136         rmesa->lost_context = GL_TRUE;
 137 }