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intel: Take an intel_screen pointer in intel_alloc_region_* functions
[android-x86/external-mesa.git] / src / mesa / drivers / dri / intel / intel_context.c
1 /**************************************************************************
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3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4  * All Rights Reserved.
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15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
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18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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27
28
29 #include "main/glheader.h"
30 #include "main/context.h"
31 #include "main/extensions.h"
32 #include "main/fbobject.h"
33 #include "main/framebuffer.h"
34 #include "main/imports.h"
35 #include "main/points.h"
36
37 #include "swrast/swrast.h"
38 #include "swrast_setup/swrast_setup.h"
39 #include "tnl/tnl.h"
40 #include "drivers/common/driverfuncs.h"
41 #include "drivers/common/meta.h"
42
43 #include "intel_chipset.h"
44 #include "intel_buffers.h"
45 #include "intel_tex.h"
46 #include "intel_batchbuffer.h"
47 #include "intel_clear.h"
48 #include "intel_extensions.h"
49 #include "intel_pixel.h"
50 #include "intel_regions.h"
51 #include "intel_buffer_objects.h"
52 #include "intel_fbo.h"
53 #include "intel_bufmgr.h"
54 #include "intel_screen.h"
55
56 #include "drirenderbuffer.h"
57 #include "utils.h"
58
59
60 #ifndef INTEL_DEBUG
61 int INTEL_DEBUG = (0);
62 #endif
63
64
65 #define DRIVER_DATE                     "20100330 DEVELOPMENT"
66 #define DRIVER_DATE_GEM                 "GEM " DRIVER_DATE
67
68
69 static const GLubyte *
70 intelGetString(GLcontext * ctx, GLenum name)
71 {
72    const struct intel_context *const intel = intel_context(ctx);
73    const char *chipset;
74    static char buffer[128];
75
76    switch (name) {
77    case GL_VENDOR:
78       return (GLubyte *) "Tungsten Graphics, Inc";
79       break;
80
81    case GL_RENDERER:
82       switch (intel->intelScreen->deviceID) {
83       case PCI_CHIP_845_G:
84          chipset = "Intel(R) 845G";
85          break;
86       case PCI_CHIP_I830_M:
87          chipset = "Intel(R) 830M";
88          break;
89       case PCI_CHIP_I855_GM:
90          chipset = "Intel(R) 852GM/855GM";
91          break;
92       case PCI_CHIP_I865_G:
93          chipset = "Intel(R) 865G";
94          break;
95       case PCI_CHIP_I915_G:
96          chipset = "Intel(R) 915G";
97          break;
98       case PCI_CHIP_E7221_G:
99          chipset = "Intel (R) E7221G (i915)";
100          break;
101       case PCI_CHIP_I915_GM:
102          chipset = "Intel(R) 915GM";
103          break;
104       case PCI_CHIP_I945_G:
105          chipset = "Intel(R) 945G";
106          break;
107       case PCI_CHIP_I945_GM:
108          chipset = "Intel(R) 945GM";
109          break;
110       case PCI_CHIP_I945_GME:
111          chipset = "Intel(R) 945GME";
112          break;
113       case PCI_CHIP_G33_G:
114          chipset = "Intel(R) G33";
115          break;
116       case PCI_CHIP_Q35_G:
117          chipset = "Intel(R) Q35";
118          break;
119       case PCI_CHIP_Q33_G:
120          chipset = "Intel(R) Q33";
121          break;
122       case PCI_CHIP_IGD_GM:
123       case PCI_CHIP_IGD_G:
124          chipset = "Intel(R) IGD";
125          break;
126       case PCI_CHIP_I965_Q:
127          chipset = "Intel(R) 965Q";
128          break;
129       case PCI_CHIP_I965_G:
130       case PCI_CHIP_I965_G_1:
131          chipset = "Intel(R) 965G";
132          break;
133       case PCI_CHIP_I946_GZ:
134          chipset = "Intel(R) 946GZ";
135          break;
136       case PCI_CHIP_I965_GM:
137          chipset = "Intel(R) 965GM";
138          break;
139       case PCI_CHIP_I965_GME:
140          chipset = "Intel(R) 965GME/GLE";
141          break;
142       case PCI_CHIP_GM45_GM:
143          chipset = "Mobile IntelĀ® GM45 Express Chipset";
144          break; 
145       case PCI_CHIP_IGD_E_G:
146          chipset = "Intel(R) Integrated Graphics Device";
147          break;
148       case PCI_CHIP_G45_G:
149          chipset = "Intel(R) G45/G43";
150          break;
151       case PCI_CHIP_Q45_G:
152          chipset = "Intel(R) Q45/Q43";
153          break;
154       case PCI_CHIP_G41_G:
155          chipset = "Intel(R) G41";
156          break;
157       case PCI_CHIP_B43_G:
158          chipset = "Intel(R) B43";
159          break;
160       case PCI_CHIP_ILD_G:
161          chipset = "Intel(R) Ironlake Desktop";
162          break;
163       case PCI_CHIP_ILM_G:
164          chipset = "Intel(R) Ironlake Mobile";
165          break;
166       default:
167          chipset = "Unknown Intel Chipset";
168          break;
169       }
170
171       (void) driGetRendererString(buffer, chipset, DRIVER_DATE_GEM, 0);
172       return (GLubyte *) buffer;
173
174    default:
175       return NULL;
176    }
177 }
178
179 static void
180 intel_flush_front(GLcontext *ctx)
181 {
182    struct intel_context *intel = intel_context(ctx);
183     __DRIcontext *driContext = intel->driContext;
184     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
185
186    if ((ctx->DrawBuffer->Name == 0) && intel->front_buffer_dirty) {
187       if (screen->dri2.loader &&
188           (screen->dri2.loader->base.version >= 2)
189           && (screen->dri2.loader->flushFrontBuffer != NULL) &&
190           driContext->driDrawablePriv &&
191           driContext->driDrawablePriv->loaderPrivate) {
192          (*screen->dri2.loader->flushFrontBuffer)(driContext->driDrawablePriv,
193                                                   driContext->driDrawablePriv->loaderPrivate);
194
195          /* We set the dirty bit in intel_prepare_render() if we're
196           * front buffer rendering once we get there.
197           */
198          intel->front_buffer_dirty = GL_FALSE;
199       }
200    }
201 }
202
203 static unsigned
204 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
205 {
206    return _mesa_get_format_bytes(rb->Base.Format) * 8;
207 }
208
209 void
210 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
211 {
212    struct gl_framebuffer *fb = drawable->driverPrivate;
213    struct intel_renderbuffer *rb;
214    struct intel_region *region, *depth_region;
215    struct intel_context *intel = context->driverPrivate;
216    struct intel_renderbuffer *front_rb, *back_rb, *depth_rb, *stencil_rb;
217    __DRIbuffer *buffers = NULL;
218    __DRIscreen *screen;
219    int i, count;
220    unsigned int attachments[10];
221    const char *region_name;
222
223    /* If we're rendering to the fake front buffer, make sure all the
224     * pending drawing has landed on the real front buffer.  Otherwise
225     * when we eventually get to DRI2GetBuffersWithFormat the stale
226     * real front buffer contents will get copied to the new fake front
227     * buffer.
228     */
229    if (intel->is_front_buffer_rendering) {
230       intel_flush(&intel->ctx);
231       intel_flush_front(&intel->ctx);
232    }
233
234    /* Set this up front, so that in case our buffers get invalidated
235     * while we're getting new buffers, we don't clobber the stamp and
236     * thus ignore the invalidate. */
237    drawable->lastStamp = drawable->dri2.stamp;
238
239    if (INTEL_DEBUG & DEBUG_DRI)
240       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
241
242    screen = intel->intelScreen->driScrnPriv;
243
244    if (screen->dri2.loader
245        && (screen->dri2.loader->base.version > 2)
246        && (screen->dri2.loader->getBuffersWithFormat != NULL)) {
247
248       front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
249       back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
250       depth_rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
251       stencil_rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
252
253       i = 0;
254       if ((intel->is_front_buffer_rendering ||
255            intel->is_front_buffer_reading ||
256            !back_rb) && front_rb) {
257          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
258          attachments[i++] = intel_bits_per_pixel(front_rb);
259       }
260
261       if (back_rb) {
262          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
263          attachments[i++] = intel_bits_per_pixel(back_rb);
264       }
265
266       if ((depth_rb != NULL) && (stencil_rb != NULL)) {
267          attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
268          attachments[i++] = intel_bits_per_pixel(depth_rb);
269       } else if (depth_rb != NULL) {
270          attachments[i++] = __DRI_BUFFER_DEPTH;
271          attachments[i++] = intel_bits_per_pixel(depth_rb);
272       } else if (stencil_rb != NULL) {
273          attachments[i++] = __DRI_BUFFER_STENCIL;
274          attachments[i++] = intel_bits_per_pixel(stencil_rb);
275       }
276
277       buffers =
278          (*screen->dri2.loader->getBuffersWithFormat)(drawable,
279                                                       &drawable->w,
280                                                       &drawable->h,
281                                                       attachments, i / 2,
282                                                       &count,
283                                                       drawable->loaderPrivate);
284    } else if (screen->dri2.loader) {
285       i = 0;
286       if (intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT))
287          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
288       if (intel_get_renderbuffer(fb, BUFFER_BACK_LEFT))
289          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
290       if (intel_get_renderbuffer(fb, BUFFER_DEPTH))
291          attachments[i++] = __DRI_BUFFER_DEPTH;
292       if (intel_get_renderbuffer(fb, BUFFER_STENCIL))
293          attachments[i++] = __DRI_BUFFER_STENCIL;
294
295       buffers = (*screen->dri2.loader->getBuffers)(drawable,
296                                                    &drawable->w,
297                                                    &drawable->h,
298                                                    attachments, i,
299                                                    &count,
300                                                    drawable->loaderPrivate);
301    }
302
303    if (buffers == NULL)
304       return;
305
306    drawable->x = 0;
307    drawable->y = 0;
308    drawable->backX = 0;
309    drawable->backY = 0;
310    drawable->numClipRects = 1;
311    drawable->pClipRects[0].x1 = 0;
312    drawable->pClipRects[0].y1 = 0;
313    drawable->pClipRects[0].x2 = drawable->w;
314    drawable->pClipRects[0].y2 = drawable->h;
315    drawable->numBackClipRects = 1;
316    drawable->pBackClipRects[0].x1 = 0;
317    drawable->pBackClipRects[0].y1 = 0;
318    drawable->pBackClipRects[0].x2 = drawable->w;
319    drawable->pBackClipRects[0].y2 = drawable->h;
320
321    depth_region = NULL;
322    for (i = 0; i < count; i++) {
323        switch (buffers[i].attachment) {
324        case __DRI_BUFFER_FRONT_LEFT:
325            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
326            region_name = "dri2 front buffer";
327            break;
328
329        case __DRI_BUFFER_FAKE_FRONT_LEFT:
330            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
331            region_name = "dri2 fake front buffer";
332            break;
333
334        case __DRI_BUFFER_BACK_LEFT:
335            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
336            region_name = "dri2 back buffer";
337            break;
338
339        case __DRI_BUFFER_DEPTH:
340            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
341            region_name = "dri2 depth buffer";
342            break;
343
344        case __DRI_BUFFER_DEPTH_STENCIL:
345            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
346            region_name = "dri2 depth / stencil buffer";
347            break;
348
349        case __DRI_BUFFER_STENCIL:
350            rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
351            region_name = "dri2 stencil buffer";
352            break;
353
354        case __DRI_BUFFER_ACCUM:
355        default:
356            fprintf(stderr,
357                    "unhandled buffer attach event, attacment type %d\n",
358                    buffers[i].attachment);
359            return;
360        }
361
362        if (rb == NULL)
363           continue;
364
365        if (rb->region && rb->region->name == buffers[i].name)
366              continue;
367
368        if (INTEL_DEBUG & DEBUG_DRI)
369           fprintf(stderr,
370                   "attaching buffer %d, at %d, cpp %d, pitch %d\n",
371                   buffers[i].name, buffers[i].attachment,
372                   buffers[i].cpp, buffers[i].pitch);
373        
374        if (buffers[i].attachment == __DRI_BUFFER_STENCIL && depth_region) {
375           if (INTEL_DEBUG & DEBUG_DRI)
376              fprintf(stderr, "(reusing depth buffer as stencil)\n");
377           intel_region_reference(&region, depth_region);
378        }
379        else
380           region = intel_region_alloc_for_handle(intel->intelScreen,
381                                                  buffers[i].cpp,
382                                                  drawable->w,
383                                                  drawable->h,
384                                                  buffers[i].pitch / buffers[i].cpp,
385                                                  buffers[i].name,
386                                                  region_name);
387
388        if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
389           depth_region = region;
390
391        intel_renderbuffer_set_region(intel, rb, region);
392        intel_region_release(&region);
393
394        if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
395           rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
396           if (rb != NULL) {
397              struct intel_region *stencil_region = NULL;
398
399              if (rb->region && rb->region->name == buffers[i].name)
400                    continue;
401
402              intel_region_reference(&stencil_region, region);
403              intel_renderbuffer_set_region(intel, rb, stencil_region);
404              intel_region_release(&stencil_region);
405           }
406        }
407    }
408
409    driUpdateFramebufferSize(&intel->ctx, drawable);
410 }
411
412 /**
413  * intel_prepare_render should be called anywhere that curent read/drawbuffer
414  * state is required.
415  */
416 void
417 intel_prepare_render(struct intel_context *intel)
418 {
419    __DRIcontext *driContext = intel->driContext;
420    __DRIdrawable *drawable;
421
422    drawable = driContext->driDrawablePriv;
423    if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
424       if (drawable->lastStamp != drawable->dri2.stamp)
425          intel_update_renderbuffers(driContext, drawable);
426       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
427       driContext->dri2.draw_stamp = drawable->dri2.stamp;
428    }
429
430    drawable = driContext->driReadablePriv;
431    if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
432       if (drawable->lastStamp != drawable->dri2.stamp)
433          intel_update_renderbuffers(driContext, drawable);
434       driContext->dri2.read_stamp = drawable->dri2.stamp;
435    }
436
437    /* If we're currently rendering to the front buffer, the rendering
438     * that will happen next will probably dirty the front buffer.  So
439     * mark it as dirty here.
440     */
441    if (intel->is_front_buffer_rendering)
442       intel->front_buffer_dirty = GL_TRUE;
443
444    /* Wait for the swapbuffers before the one we just emitted, so we
445     * don't get too many swaps outstanding for apps that are GPU-heavy
446     * but not CPU-heavy.
447     *
448     * We're using intelDRI2Flush (called from the loader before
449     * swapbuffer) and glFlush (for front buffer rendering) as the
450     * indicator that a frame is done and then throttle when we get
451     * here as we prepare to render the next frame.  At this point for
452     * round trips for swap/copy and getting new buffers are done and
453     * we'll spend less time waiting on the GPU.
454     *
455     * Unfortunately, we don't have a handle to the batch containing
456     * the swap, and getting our hands on that doesn't seem worth it,
457     * so we just us the first batch we emitted after the last swap.
458     */
459    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
460       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
461       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
462       intel->first_post_swapbuffers_batch = NULL;
463       intel->need_throttle = GL_FALSE;
464    }
465 }
466
467 static void
468 intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
469 {
470     struct intel_context *intel = intel_context(ctx);
471     __DRIcontext *driContext = intel->driContext;
472
473     if (intel->saved_viewport)
474         intel->saved_viewport(ctx, x, y, w, h);
475
476     if (!intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
477        dri2InvalidateDrawable(driContext->driDrawablePriv);
478        dri2InvalidateDrawable(driContext->driReadablePriv);
479     }
480 }
481
482 static const struct dri_debug_control debug_control[] = {
483    { "tex",   DEBUG_TEXTURE},
484    { "state", DEBUG_STATE},
485    { "ioctl", DEBUG_IOCTL},
486    { "blit",  DEBUG_BLIT},
487    { "mip",   DEBUG_MIPTREE},
488    { "fall",  DEBUG_FALLBACKS},
489    { "verb",  DEBUG_VERBOSE},
490    { "bat",   DEBUG_BATCH},
491    { "pix",   DEBUG_PIXEL},
492    { "buf",   DEBUG_BUFMGR},
493    { "reg",   DEBUG_REGION},
494    { "fbo",   DEBUG_FBO},
495    { "gs",    DEBUG_GS},
496    { "sync",  DEBUG_SYNC},
497    { "prim",  DEBUG_PRIMS },
498    { "vert",  DEBUG_VERTS },
499    { "dri",   DEBUG_DRI },
500    { "sf",    DEBUG_SF },
501    { "san",   DEBUG_SANITY },
502    { "sleep", DEBUG_SLEEP },
503    { "stats", DEBUG_STATS },
504    { "tile",  DEBUG_TILE },
505    { "sing",  DEBUG_SINGLE_THREAD },
506    { "thre",  DEBUG_SINGLE_THREAD },
507    { "wm",    DEBUG_WM },
508    { "glsl_force", DEBUG_GLSL_FORCE },
509    { "urb",   DEBUG_URB },
510    { "vs",    DEBUG_VS },
511    { "clip",  DEBUG_CLIP },
512    { NULL,    0 }
513 };
514
515
516 static void
517 intelInvalidateState(GLcontext * ctx, GLuint new_state)
518 {
519     struct intel_context *intel = intel_context(ctx);
520
521    _swrast_InvalidateState(ctx, new_state);
522    _swsetup_InvalidateState(ctx, new_state);
523    _vbo_InvalidateState(ctx, new_state);
524    _tnl_InvalidateState(ctx, new_state);
525    _tnl_invalidate_vertex_state(ctx, new_state);
526
527    intel->NewGLState |= new_state;
528
529    if (intel->vtbl.invalidate_state)
530       intel->vtbl.invalidate_state( intel, new_state );
531 }
532
533 void
534 intel_flush(GLcontext *ctx)
535 {
536    struct intel_context *intel = intel_context(ctx);
537
538    if (intel->Fallback)
539       _swrast_flush(ctx);
540
541    if (intel->gen < 4)
542       INTEL_FIREVERTICES(intel);
543
544    if (intel->batch->map != intel->batch->ptr)
545       intel_batchbuffer_flush(intel->batch);
546 }
547
548 static void
549 intel_glFlush(GLcontext *ctx)
550 {
551    struct intel_context *intel = intel_context(ctx);
552
553    intel_flush(ctx);
554    intel_flush_front(ctx);
555    intel->need_throttle = GL_TRUE;
556 }
557
558 void
559 intelFinish(GLcontext * ctx)
560 {
561    struct gl_framebuffer *fb = ctx->DrawBuffer;
562    int i;
563
564    intel_flush(ctx);
565    intel_flush_front(ctx);
566
567    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
568        struct intel_renderbuffer *irb;
569
570        irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
571
572        if (irb && irb->region)
573           drm_intel_bo_wait_rendering(irb->region->buffer);
574    }
575    if (fb->_DepthBuffer) {
576       /* XXX: Wait on buffer idle */
577    }
578 }
579
580 void
581 intelInitDriverFunctions(struct dd_function_table *functions)
582 {
583    _mesa_init_driver_functions(functions);
584
585    functions->Flush = intel_glFlush;
586    functions->Finish = intelFinish;
587    functions->GetString = intelGetString;
588    functions->UpdateState = intelInvalidateState;
589
590    intelInitTextureFuncs(functions);
591    intelInitTextureImageFuncs(functions);
592    intelInitTextureSubImageFuncs(functions);
593    intelInitTextureCopyImageFuncs(functions);
594    intelInitStateFuncs(functions);
595    intelInitClearFuncs(functions);
596    intelInitBufferFuncs(functions);
597    intelInitPixelFuncs(functions);
598    intelInitBufferObjectFuncs(functions);
599    intel_init_syncobj_functions(functions);
600 }
601
602
603 GLboolean
604 intelInitContext(struct intel_context *intel,
605                  int api,
606                  const __GLcontextModes * mesaVis,
607                  __DRIcontext * driContextPriv,
608                  void *sharedContextPrivate,
609                  struct dd_function_table *functions)
610 {
611    GLcontext *ctx = &intel->ctx;
612    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
613    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
614    struct intel_screen *intelScreen = sPriv->private;
615    int bo_reuse_mode;
616    __GLcontextModes visual;
617
618    /* we can't do anything without a connection to the device */
619    if (intelScreen->bufmgr == NULL)
620       return GL_FALSE;
621
622    /* Can't rely on invalidate events, fall back to glViewport hack */
623    if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
624       intel->saved_viewport = functions->Viewport;
625       functions->Viewport = intel_viewport;
626    }
627
628    if (mesaVis == NULL) {
629       memset(&visual, 0, sizeof visual);
630       mesaVis = &visual;
631    }
632
633    if (!_mesa_initialize_context_for_api(&intel->ctx, api, mesaVis, shareCtx,
634                                          functions, (void *) intel)) {
635       printf("%s: failed to init mesa context\n", __FUNCTION__);
636       return GL_FALSE;
637    }
638
639    driContextPriv->driverPrivate = intel;
640    intel->intelScreen = intelScreen;
641    intel->driContext = driContextPriv;
642    intel->driFd = sPriv->fd;
643
644    intel->has_xrgb_textures = GL_TRUE;
645    if (IS_GEN6(intel->intelScreen->deviceID)) {
646       intel->gen = 6;
647       intel->needs_ff_sync = GL_TRUE;
648       intel->has_luminance_srgb = GL_TRUE;
649    } else if (IS_GEN5(intel->intelScreen->deviceID)) {
650       intel->gen = 5;
651       intel->needs_ff_sync = GL_TRUE;
652       intel->has_luminance_srgb = GL_TRUE;
653    } else if (IS_965(intel->intelScreen->deviceID)) {
654       intel->gen = 4;
655       if (IS_G4X(intel->intelScreen->deviceID)) {
656           intel->has_luminance_srgb = GL_TRUE;
657           intel->is_g4x = GL_TRUE;
658       }
659    } else if (IS_9XX(intel->intelScreen->deviceID)) {
660       intel->gen = 3;
661       if (IS_945(intel->intelScreen->deviceID)) {
662          intel->is_945 = GL_TRUE;
663       }
664    } else {
665       intel->gen = 2;
666       if (intel->intelScreen->deviceID == PCI_CHIP_I830_M ||
667           intel->intelScreen->deviceID == PCI_CHIP_845_G) {
668          intel->has_xrgb_textures = GL_FALSE;
669       }
670    }
671
672    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
673                        sPriv->myNum, (intel->gen >= 4) ? "i965" : "i915");
674    if (intelScreen->deviceID == PCI_CHIP_I865_G)
675       intel->maxBatchSize = 4096;
676    else
677       intel->maxBatchSize = BATCH_SZ;
678
679    intel->bufmgr = intelScreen->bufmgr;
680
681    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
682    switch (bo_reuse_mode) {
683    case DRI_CONF_BO_REUSE_DISABLED:
684       break;
685    case DRI_CONF_BO_REUSE_ALL:
686       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
687       break;
688    }
689
690    /* This doesn't yet catch all non-conformant rendering, but it's a
691     * start.
692     */
693    if (getenv("INTEL_STRICT_CONFORMANCE")) {
694       unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
695       if (value > 0) {
696          intel->conformance_mode = value;
697       }
698       else {
699          intel->conformance_mode = 1;
700       }
701    }
702
703    if (intel->conformance_mode > 0) {
704       ctx->Const.MinLineWidth = 1.0;
705       ctx->Const.MinLineWidthAA = 1.0;
706       ctx->Const.MaxLineWidth = 1.0;
707       ctx->Const.MaxLineWidthAA = 1.0;
708       ctx->Const.LineWidthGranularity = 1.0;
709    }
710    else {
711       ctx->Const.MinLineWidth = 1.0;
712       ctx->Const.MinLineWidthAA = 1.0;
713       ctx->Const.MaxLineWidth = 5.0;
714       ctx->Const.MaxLineWidthAA = 5.0;
715       ctx->Const.LineWidthGranularity = 0.5;
716    }
717
718    ctx->Const.MinPointSize = 1.0;
719    ctx->Const.MinPointSizeAA = 1.0;
720    ctx->Const.MaxPointSize = 255.0;
721    ctx->Const.MaxPointSizeAA = 3.0;
722    ctx->Const.PointSizeGranularity = 1.0;
723
724    ctx->Const.MaxSamples = 1.0;
725
726    /* reinitialize the context point state.
727     * It depend on constants in __GLcontextRec::Const
728     */
729    _mesa_init_point(ctx);
730
731    meta_init_metaops(ctx, &intel->meta);
732    if (intel->gen >= 4) {
733       if (MAX_WIDTH > 8192)
734          ctx->Const.MaxRenderbufferSize = 8192;
735    } else {
736       if (MAX_WIDTH > 2048)
737          ctx->Const.MaxRenderbufferSize = 2048;
738    }
739
740    /* Initialize the software rasterizer and helper modules. */
741    _swrast_CreateContext(ctx);
742    _vbo_CreateContext(ctx);
743    _tnl_CreateContext(ctx);
744    _swsetup_CreateContext(ctx);
745  
746    /* Configure swrast to match hardware characteristics: */
747    _swrast_allow_pixel_fog(ctx, GL_FALSE);
748    _swrast_allow_vertex_fog(ctx, GL_TRUE);
749
750    _mesa_meta_init(ctx);
751
752    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
753    intel->hw_stipple = 1;
754
755    /* XXX FBO: this doesn't seem to be used anywhere */
756    switch (mesaVis->depthBits) {
757    case 0:                     /* what to do in this case? */
758    case 16:
759       intel->polygon_offset_scale = 1.0;
760       break;
761    case 24:
762       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
763       break;
764    default:
765       assert(0);
766       break;
767    }
768
769    if (intel->gen >= 4)
770       intel->polygon_offset_scale /= 0xffff;
771
772    intel->RenderIndex = ~0;
773
774    switch (ctx->API) {
775    case API_OPENGL:
776       intelInitExtensions(ctx);
777       break;
778    case API_OPENGLES:
779       break;
780    case API_OPENGLES2:
781       intelInitExtensionsES2(ctx);
782       break;
783    }
784
785    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
786    if (INTEL_DEBUG & DEBUG_BUFMGR)
787       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
788
789    intel->batch = intel_batchbuffer_alloc(intel);
790
791    intel_fbo_init(intel);
792
793    if (intel->ctx.Mesa_DXTn) {
794       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
795       _mesa_enable_extension(ctx, "GL_S3_s3tc");
796    }
797    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
798       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
799    }
800    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
801                                                "texture_tiling");
802    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
803
804    intel->prim.primitive = ~0;
805
806    /* Force all software fallbacks */
807    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
808       fprintf(stderr, "disabling 3D rasterization\n");
809       intel->no_rast = 1;
810    }
811
812    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
813       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
814       intel->always_flush_batch = 1;
815    }
816
817    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
818       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
819       intel->always_flush_cache = 1;
820    }
821
822    /* Disable all hardware rendering (skip emitting batches and fences/waits
823     * to the kernel)
824     */
825    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
826
827    return GL_TRUE;
828 }
829
830 void
831 intelDestroyContext(__DRIcontext * driContextPriv)
832 {
833    struct intel_context *intel =
834       (struct intel_context *) driContextPriv->driverPrivate;
835
836    assert(intel);               /* should never be null */
837    if (intel) {
838       INTEL_FIREVERTICES(intel);
839
840       _mesa_meta_free(&intel->ctx);
841
842       meta_destroy_metaops(&intel->meta);
843
844       intel->vtbl.destroy(intel);
845
846       _swsetup_DestroyContext(&intel->ctx);
847       _tnl_DestroyContext(&intel->ctx);
848       _vbo_DestroyContext(&intel->ctx);
849
850       _swrast_DestroyContext(&intel->ctx);
851       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
852
853       intel_batchbuffer_free(intel->batch);
854       intel->batch = NULL;
855
856       free(intel->prim.vb);
857       intel->prim.vb = NULL;
858       drm_intel_bo_unreference(intel->prim.vb_bo);
859       intel->prim.vb_bo = NULL;
860       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
861       intel->first_post_swapbuffers_batch = NULL;
862
863       driDestroyOptionCache(&intel->optionCache);
864
865       /* free the Mesa context */
866       _mesa_free_context_data(&intel->ctx);
867
868       FREE(intel);
869       driContextPriv->driverPrivate = NULL;
870    }
871 }
872
873 GLboolean
874 intelUnbindContext(__DRIcontext * driContextPriv)
875 {
876    return GL_TRUE;
877 }
878
879 GLboolean
880 intelMakeCurrent(__DRIcontext * driContextPriv,
881                  __DRIdrawable * driDrawPriv,
882                  __DRIdrawable * driReadPriv)
883 {
884    struct intel_context *intel;
885    GET_CURRENT_CONTEXT(curCtx);
886
887    if (driContextPriv)
888       intel = (struct intel_context *) driContextPriv->driverPrivate;
889    else
890       intel = NULL;
891
892    /* According to the glXMakeCurrent() man page: "Pending commands to
893     * the previous context, if any, are flushed before it is released."
894     * But only flush if we're actually changing contexts.
895     */
896    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
897       _mesa_flush(curCtx);
898    }
899
900    if (driContextPriv) {
901       struct gl_framebuffer *fb, *readFb;
902       
903       if (driDrawPriv == NULL && driReadPriv == NULL) {
904          fb = _mesa_get_incomplete_framebuffer();
905          readFb = _mesa_get_incomplete_framebuffer();
906       } else {
907          fb = driDrawPriv->driverPrivate;
908          readFb = driReadPriv->driverPrivate;
909          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
910          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
911       }
912
913       intel_prepare_render(intel);
914       _mesa_make_current(&intel->ctx, fb, readFb);
915       
916       /* We do this in intel_prepare_render() too, but intel->ctx.DrawBuffer
917        * is NULL at that point.  We can't call _mesa_makecurrent()
918        * first, since we need the buffer size for the initial
919        * viewport.  So just call intel_draw_buffer() again here. */
920       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
921    }
922    else {
923       _mesa_make_current(NULL, NULL, NULL);
924    }
925
926    return GL_TRUE;
927 }