merge current trunk into vbo branch

1 files changed, 707 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915tex/intel_context.c b/src/mesa/drivers/dri/i915tex/intel_context.c
new file mode 100644
index 0000000000..3d51a6341c
--- /dev/null
+++ b/src/mesa/drivers/dri/i915tex/intel_context.c
@@ -0,0 +1,707 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, 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 TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+
+#include "glheader.h"
+#include "context.h"
+#include "matrix.h"
+#include "simple_list.h"
+#include "extensions.h"
+#include "framebuffer.h"
+#include "imports.h"
+
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+#include "tnl/tnl.h"
+#include "array_cache/acache.h"
+
+#include "tnl/t_pipeline.h"
+#include "tnl/t_vertex.h"
+
+#include "drivers/common/driverfuncs.h"
+
+#include "intel_screen.h"
+
+#include "i830_dri.h"
+
+#include "intel_buffers.h"
+#include "intel_tex.h"
+#include "intel_span.h"
+#include "intel_tris.h"
+#include "intel_ioctl.h"
+#include "intel_batchbuffer.h"
+#include "intel_blit.h"
+#include "intel_pixel.h"
+#include "intel_regions.h"
+#include "intel_buffer_objects.h"
+#include "intel_fbo.h"
+
+#include "vblank.h"
+#include "utils.h"
+#include "xmlpool.h"            /* for symbolic values of enum-type options */
+#ifndef INTEL_DEBUG
+int INTEL_DEBUG = (0);
+#endif
+
+#define need_GL_ARB_multisample
+#define need_GL_ARB_point_parameters
+#define need_GL_ARB_texture_compression
+#define need_GL_ARB_vertex_buffer_object
+#define need_GL_ARB_vertex_program
+#define need_GL_ARB_window_pos
+#define need_GL_EXT_blend_color
+#define need_GL_EXT_blend_equation_separate
+#define need_GL_EXT_blend_func_separate
+#define need_GL_EXT_blend_minmax
+#define need_GL_EXT_cull_vertex
+#define need_GL_EXT_fog_coord
+#define need_GL_EXT_framebuffer_object
+#define need_GL_EXT_multi_draw_arrays
+#define need_GL_EXT_secondary_color
+#define need_GL_NV_vertex_program
+#include "extension_helper.h"
+
+
+#define DRIVER_DATE                     "20060929"
+
+_glthread_Mutex lockMutex;
+static GLboolean lockMutexInit = GL_FALSE;
+
+
+static const GLubyte *
+intelGetString(GLcontext * ctx, GLenum name)
+{
+   const char *chipset;
+   static char buffer[128];
+
+   switch (name) {
+   case GL_VENDOR:
+      return (GLubyte *) "Tungsten Graphics, Inc";
+      break;
+
+   case GL_RENDERER:
+      switch (intel_context(ctx)->intelScreen->deviceID) {
+      case PCI_CHIP_845_G:
+         chipset = "Intel(R) 845G";
+         break;
+      case PCI_CHIP_I830_M:
+         chipset = "Intel(R) 830M";
+         break;
+      case PCI_CHIP_I855_GM:
+         chipset = "Intel(R) 852GM/855GM";
+         break;
+      case PCI_CHIP_I865_G:
+         chipset = "Intel(R) 865G";
+         break;
+      case PCI_CHIP_I915_G:
+         chipset = "Intel(R) 915G";
+         break;
+      case PCI_CHIP_I915_GM:
+         chipset = "Intel(R) 915GM";
+         break;
+      case PCI_CHIP_I945_G:
+         chipset = "Intel(R) 945G";
+         break;
+      case PCI_CHIP_I945_GM:
+         chipset = "Intel(R) 945GM";
+         break;
+      default:
+         chipset = "Unknown Intel Chipset";
+         break;
+      }
+
+      (void) driGetRendererString(buffer, chipset, DRIVER_DATE, 0);
+      return (GLubyte *) buffer;
+
+   default:
+      return NULL;
+   }
+}
+
+
+/**
+ * Extension strings exported by the intel driver.
+ *
+ * \note
+ * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
+ * old i830-specific driver.
+ */
+const struct dri_extension card_extensions[] = {
+   {"GL_ARB_multisample", GL_ARB_multisample_functions},
+   {"GL_ARB_multitexture", NULL},
+   {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
+   {"GL_ARB_texture_border_clamp", NULL},
+   {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
+   {"GL_ARB_texture_cube_map", NULL},
+   {"GL_ARB_texture_env_add", NULL},
+   {"GL_ARB_texture_env_combine", NULL},
+   {"GL_ARB_texture_env_dot3", NULL},
+   {"GL_ARB_texture_mirrored_repeat", NULL},
+   {"GL_ARB_texture_rectangle", NULL},
+   {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
+   {"GL_ARB_pixel_buffer_object", NULL},
+   {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
+   {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
+   {"GL_EXT_blend_color", GL_EXT_blend_color_functions},
+   {"GL_EXT_blend_equation_separate",
+    GL_EXT_blend_equation_separate_functions},
+   {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
+   {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
+   {"GL_EXT_blend_subtract", NULL},
+   {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
+   {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
+   {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
+   {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
+#if 1                           /* XXX FBO temporary? */
+   {"GL_EXT_packed_depth_stencil", NULL},
+#endif
+   {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
+   {"GL_EXT_stencil_wrap", NULL},
+   {"GL_EXT_texture_edge_clamp", NULL},
+   {"GL_EXT_texture_env_combine", NULL},
+   {"GL_EXT_texture_env_dot3", NULL},
+   {"GL_EXT_texture_filter_anisotropic", NULL},
+   {"GL_EXT_texture_lod_bias", NULL},
+   {"GL_3DFX_texture_compression_FXT1", NULL},
+   {"GL_APPLE_client_storage", NULL},
+   {"GL_MESA_pack_invert", NULL},
+   {"GL_MESA_ycbcr_texture", NULL},
+   {"GL_NV_blend_square", NULL},
+   {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
+   {"GL_NV_vertex_program1_1", NULL},
+/*     { "GL_SGIS_generate_mipmap",           NULL }, */
+   {NULL, NULL}
+};
+
+extern const struct tnl_pipeline_stage _intel_render_stage;
+
+static const struct tnl_pipeline_stage *intel_pipeline[] = {
+   &_tnl_vertex_transform_stage,
+   &_tnl_vertex_cull_stage,
+   &_tnl_normal_transform_stage,
+   &_tnl_lighting_stage,
+   &_tnl_fog_coordinate_stage,
+   &_tnl_texgen_stage,
+   &_tnl_texture_transform_stage,
+   &_tnl_point_attenuation_stage,
+   &_tnl_arb_vertex_program_stage,
+   &_tnl_vertex_program_stage,
+#if 1
+   &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
+#endif
+   &_tnl_render_stage,
+   0,
+};
+
+
+static const struct dri_debug_control debug_control[] = {
+   {"tex", DEBUG_TEXTURE},
+   {"state", DEBUG_STATE},
+   {"ioctl", DEBUG_IOCTL},
+   {"blit", DEBUG_BLIT},
+   {"mip", DEBUG_MIPTREE},
+   {"fall", DEBUG_FALLBACKS},
+   {"verb", DEBUG_VERBOSE},
+   {"bat", DEBUG_BATCH},
+   {"pix", DEBUG_PIXEL},
+   {"buf", DEBUG_BUFMGR},
+   {"reg", DEBUG_REGION},
+   {"fbo", DEBUG_FBO},
+   {"lock", DEBUG_LOCK},
+   {NULL, 0}
+};
+
+
+static void
+intelInvalidateState(GLcontext * ctx, GLuint new_state)
+{
+   _swrast_InvalidateState(ctx, new_state);
+   _swsetup_InvalidateState(ctx, new_state);
+   _ac_InvalidateState(ctx, new_state);
+   _tnl_InvalidateState(ctx, new_state);
+   _tnl_invalidate_vertex_state(ctx, new_state);
+   intel_context(ctx)->NewGLState |= new_state;
+}
+
+
+void
+intelFlush(GLcontext * ctx)
+{
+   struct intel_context *intel = intel_context(ctx);
+
+   if (intel->Fallback)
+      _swrast_flush(ctx);
+
+   INTEL_FIREVERTICES(intel);
+
+   if (intel->batch->map != intel->batch->ptr)
+      intel_batchbuffer_flush(intel->batch);
+
+   /* XXX: Need to do an MI_FLUSH here.
+    */
+}
+
+
+/**
+ * Check if we need to rotate/warp the front color buffer to the
+ * rotated screen.  We generally need to do this when we get a glFlush
+ * or glFinish after drawing to the front color buffer.
+ */
+static void
+intelCheckFrontRotate(GLcontext * ctx)
+{
+   struct intel_context *intel = intel_context(ctx);
+   if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] ==
+       BUFFER_BIT_FRONT_LEFT) {
+      intelScreenPrivate *screen = intel->intelScreen;
+      if (screen->current_rotation != 0) {
+         __DRIdrawablePrivate *dPriv = intel->driDrawable;
+         intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
+      }
+   }
+}
+
+
+/**
+ * Called via glFlush.
+ */
+static void
+intelglFlush(GLcontext * ctx)
+{
+   intelFlush(ctx);
+   intelCheckFrontRotate(ctx);
+}
+
+void
+intelFinish(GLcontext * ctx)
+{
+   struct intel_context *intel = intel_context(ctx);
+   intelFlush(ctx);
+   if (intel->batch->last_fence) {
+      driFenceFinish(intel->batch->last_fence,
+                     0, GL_FALSE);
+      driFenceUnReference(intel->batch->last_fence);
+      intel->batch->last_fence = NULL;
+   }
+   intelCheckFrontRotate(ctx);
+}
+
+
+void
+intelInitDriverFunctions(struct dd_function_table *functions)
+{
+   _mesa_init_driver_functions(functions);
+
+   functions->Flush = intelglFlush;
+   functions->Finish = intelFinish;
+   functions->GetString = intelGetString;
+   functions->UpdateState = intelInvalidateState;
+   functions->CopyColorTable = _swrast_CopyColorTable;
+   functions->CopyColorSubTable = _swrast_CopyColorSubTable;
+   functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
+   functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
+
+   intelInitTextureFuncs(functions);
+   intelInitPixelFuncs(functions);
+   intelInitStateFuncs(functions);
+   intelInitBufferFuncs(functions);
+}
+
+
+GLboolean
+intelInitContext(struct intel_context *intel,
+                 const __GLcontextModes * mesaVis,
+                 __DRIcontextPrivate * driContextPriv,
+                 void *sharedContextPrivate,
+                 struct dd_function_table *functions)
+{
+   GLcontext *ctx = &intel->ctx;
+   GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
+   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
+   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
+   drmI830Sarea *saPriv = (drmI830Sarea *)
+      (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
+   int fthrottle_mode;
+
+   if (!_mesa_initialize_context(&intel->ctx,
+                                 mesaVis, shareCtx,
+                                 functions, (void *) intel))
+      return GL_FALSE;
+
+   driContextPriv->driverPrivate = intel;
+   intel->intelScreen = intelScreen;
+   intel->driScreen = sPriv;
+   intel->sarea = saPriv;
+
+   if (!lockMutexInit) {
+      lockMutexInit = GL_TRUE;
+      _glthread_INIT_MUTEX(lockMutex);
+   }
+
+   driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
+                       intel->driScreen->myNum, "i915");
+
+   ctx->Const.MaxTextureMaxAnisotropy = 2.0;
+
+   /* This doesn't yet catch all non-conformant rendering, but it's a
+    * start.
+    */
+   if (getenv("INTEL_STRICT_CONFORMANCE")) {
+      intel->strict_conformance = 1;
+   }
+
+   ctx->Const.MinLineWidth = 1.0;
+   ctx->Const.MinLineWidthAA = 1.0;
+   ctx->Const.MaxLineWidth = 3.0;
+   ctx->Const.MaxLineWidthAA = 3.0;
+   ctx->Const.LineWidthGranularity = 1.0;
+
+   ctx->Const.MinPointSize = 1.0;
+   ctx->Const.MinPointSizeAA = 1.0;
+   ctx->Const.MaxPointSize = 255.0;
+   ctx->Const.MaxPointSizeAA = 3.0;
+   ctx->Const.PointSizeGranularity = 1.0;
+
+   ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
+
+   /* Initialize the software rasterizer and helper modules. */
+   _swrast_CreateContext(ctx);
+   _ac_CreateContext(ctx);
+   _tnl_CreateContext(ctx);
+   _swsetup_CreateContext(ctx);
+
+   /* Install the customized pipeline: */
+   _tnl_destroy_pipeline(ctx);
+   _tnl_install_pipeline(ctx, intel_pipeline);
+
+   /* Configure swrast to match hardware characteristics: */
+   _swrast_allow_pixel_fog(ctx, GL_FALSE);
+   _swrast_allow_vertex_fog(ctx, GL_TRUE);
+
+   /* Dri stuff */
+   intel->hHWContext = driContextPriv->hHWContext;
+   intel->driFd = sPriv->fd;
+   intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
+
+   intel->hw_stipple = 1;
+
+   /* XXX FBO: this doesn't seem to be used anywhere */
+   switch (mesaVis->depthBits) {
+   case 0:                     /* what to do in this case? */
+   case 16:
+      intel->polygon_offset_scale = 1.0 / 0xffff;
+      break;
+   case 24:
+      intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
+      break;
+   default:
+      assert(0);
+      break;
+   }
+
+   /* Initialize swrast, tnl driver tables: */
+   intelInitSpanFuncs(ctx);
+   intelInitTriFuncs(ctx);
+
+
+   intel->RenderIndex = ~0;
+
+   fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
+   intel->iw.irq_seq = -1;
+   intel->irqsEmitted = 0;
+
+   intel->do_irqs = (intel->intelScreen->irq_active &&
+                     fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
+
+   intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
+
+   intel->vblank_flags = (intel->intelScreen->irq_active != 0)
+      ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
+
+   (*dri_interface->getUST) (&intel->swap_ust);
+   _math_matrix_ctr(&intel->ViewportMatrix);
+
+   /* Disable imaging extension until convolution is working in
+    * teximage paths:
+    */
+   driInitExtensions(ctx, card_extensions,
+/* 		      GL_TRUE, */
+                     GL_FALSE);
+
+
+   intel->batch = intel_batchbuffer_alloc(intel);
+   intel->last_swap_fence = NULL;
+   intel->first_swap_fence = NULL;
+
+   intel_bufferobj_init(intel);
+   intel_fbo_init(intel);
+
+   if (intel->ctx.Mesa_DXTn) {
+      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
+      _mesa_enable_extension(ctx, "GL_S3_s3tc");
+   }
+   else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
+      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
+   }
+
+   intel->prim.primitive = ~0;
+
+
+#if DO_DEBUG
+   INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
+#endif
+
+   if (getenv("INTEL_NO_RAST")) {
+      fprintf(stderr, "disabling 3D rasterization\n");
+      FALLBACK(intel, INTEL_FALLBACK_USER, 1);
+   }
+
+   return GL_TRUE;
+}
+
+void
+intelDestroyContext(__DRIcontextPrivate * driContextPriv)
+{
+   struct intel_context *intel =
+      (struct intel_context *) driContextPriv->driverPrivate;
+
+   assert(intel);               /* should never be null */
+   if (intel) {
+      GLboolean release_texture_heaps;
+
+      INTEL_FIREVERTICES(intel);
+
+      intel->vtbl.destroy(intel);
+
+      release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
+      _swsetup_DestroyContext(&intel->ctx);
+      _tnl_DestroyContext(&intel->ctx);
+      _ac_DestroyContext(&intel->ctx);
+
+      _swrast_DestroyContext(&intel->ctx);
+      intel->Fallback = 0;      /* don't call _swrast_Flush later */
+
+      intel_batchbuffer_free(intel->batch);
+
+      if (intel->last_swap_fence) {
+	 driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
+	 driFenceUnReference(intel->last_swap_fence);
+	 intel->last_swap_fence = NULL;
+      }
+      if (intel->first_swap_fence) {
+	 driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
+	 driFenceUnReference(intel->first_swap_fence);
+	 intel->first_swap_fence = NULL;
+      }
+
+
+      if (release_texture_heaps) {
+         /* This share group is about to go away, free our private
+          * texture object data.
+          */
+         if (INTEL_DEBUG & DEBUG_TEXTURE)
+            fprintf(stderr, "do something to free texture heaps\n");
+      }
+
+      /* free the Mesa context */
+      _mesa_free_context_data(&intel->ctx);
+   }
+}
+
+GLboolean
+intelUnbindContext(__DRIcontextPrivate * driContextPriv)
+{
+   return GL_TRUE;
+}
+
+GLboolean
+intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
+                 __DRIdrawablePrivate * driDrawPriv,
+                 __DRIdrawablePrivate * driReadPriv)
+{
+
+   if (driContextPriv) {
+      struct intel_context *intel =
+         (struct intel_context *) driContextPriv->driverPrivate;
+      GLframebuffer *drawFb = (GLframebuffer *) driDrawPriv->driverPrivate;
+      GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
+
+
+      /* XXX FBO temporary fix-ups! */
+      /* if the renderbuffers don't have regions, init them from the context */
+      {
+         struct intel_renderbuffer *irbFront
+            = intel_get_renderbuffer(drawFb, BUFFER_FRONT_LEFT);
+         struct intel_renderbuffer *irbBack
+            = intel_get_renderbuffer(drawFb, BUFFER_BACK_LEFT);
+         struct intel_renderbuffer *irbDepth
+            = intel_get_renderbuffer(drawFb, BUFFER_DEPTH);
+         struct intel_renderbuffer *irbStencil
+            = intel_get_renderbuffer(drawFb, BUFFER_STENCIL);
+
+         if (irbFront && !irbFront->region) {
+            intel_region_reference(&irbFront->region, intel->intelScreen->front_region);
+         }
+         if (irbBack && !irbBack->region) {
+            intel_region_reference(&irbBack->region, intel->intelScreen->back_region);
+         }
+         if (irbDepth && !irbDepth->region) {
+            intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
+         }
+         if (irbStencil && !irbStencil->region) {
+            intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
+         }
+      }
+
+      _mesa_make_current(&intel->ctx, drawFb, readFb);
+
+      /* The drawbuffer won't always be updated by _mesa_make_current: 
+       */
+      if (intel->ctx.DrawBuffer == drawFb) {
+
+	 if (intel->driDrawable != driDrawPriv) {
+	    driDrawableInitVBlank(driDrawPriv, intel->vblank_flags, &intel->vbl_seq);	    
+	    intel->driDrawable = driDrawPriv;
+	    intelWindowMoved(intel);
+	 }
+
+	 intel_draw_buffer(&intel->ctx, drawFb);
+      }
+   }
+   else {
+      _mesa_make_current(NULL, NULL, NULL);
+   }
+
+   return GL_TRUE;
+}
+
+static void
+intelContendedLock(struct intel_context *intel, GLuint flags)
+{
+   __DRIdrawablePrivate *dPriv = intel->driDrawable;
+   __DRIscreenPrivate *sPriv = intel->driScreen;
+   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
+   drmI830Sarea *sarea = intel->sarea;
+
+   drmGetLock(intel->driFd, intel->hHWContext, flags);
+
+   if (INTEL_DEBUG & DEBUG_LOCK)
+      _mesa_printf("%s - got contended lock\n", __progname);
+
+   /* If the window moved, may need to set a new cliprect now.
+    *
+    * NOTE: This releases and regains the hw lock, so all state
+    * checking must be done *after* this call:
+    */
+   if (dPriv)
+      DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
+
+   if (sarea->width != intelScreen->width ||
+       sarea->height != intelScreen->height ||
+       sarea->rotation != intelScreen->current_rotation) {
+
+      intelUpdateScreenRotation(sPriv, sarea);
+
+      /* 
+       * This will drop the outstanding batchbuffer on the floor
+       * FIXME: This should be done for all contexts?
+       */
+
+      intel_batchbuffer_reset(intel->batch);
+
+      /* lose all primitives */
+      intel->prim.primitive = ~0;
+      intel->prim.start_ptr = 0;
+      intel->prim.flush = 0;
+
+      /* re-emit all state */
+      intel->vtbl.lost_hardware(intel);
+
+      /* force window update */
+      intel->lastStamp = 0;
+   }
+
+
+   /* Drawable changed?
+    */
+   if (dPriv && intel->lastStamp != dPriv->lastStamp) {
+      intelWindowMoved(intel);
+      intel->lastStamp = dPriv->lastStamp;
+   }
+}
+
+
+extern _glthread_Mutex lockMutex;
+
+
+/* Lock the hardware and validate our state.  
+ */
+void LOCK_HARDWARE( struct intel_context *intel )
+{
+    char __ret=0;
+
+    _glthread_LOCK_MUTEX(lockMutex);
+    assert(!intel->locked);
+
+    if (intel->swap_scheduled) {
+	drmVBlank vbl;
+	vbl.request.type = DRM_VBLANK_ABSOLUTE;
+	if ( intel->vblank_flags & VBLANK_FLAG_SECONDARY ) {
+	    vbl.request.type |= DRM_VBLANK_SECONDARY;
+	}
+	vbl.request.sequence = intel->vbl_seq;
+	drmWaitVBlank(intel->driFd, &vbl);
+	intel->swap_scheduled = 0;
+    }
+
+    DRM_CAS(intel->driHwLock, intel->hHWContext,
+        (DRM_LOCK_HELD|intel->hHWContext), __ret);
+
+    if (__ret)
+        intelContendedLock( intel, 0 );
+
+    if (INTEL_DEBUG & DEBUG_LOCK)
+      _mesa_printf("%s - locked\n", __progname);
+
+    intel->locked = 1;
+}
+
+
+  /* Unlock the hardware using the global current context 
+   */
+void UNLOCK_HARDWARE( struct intel_context *intel )
+{
+   intel->locked = 0;
+
+   DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
+
+   _glthread_UNLOCK_MUTEX(lockMutex);
+
+   if (INTEL_DEBUG & DEBUG_LOCK)
+      _mesa_printf("%s - unlocked\n", __progname);
+} 
+