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[android-x86/external-mesa.git] / src / mesa / drivers / dri / intel / intel_context.c
1 /**************************************************************************
2  * 
3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4  * All Rights Reserved.
5  * 
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  * 
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  * 
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  * 
26  **************************************************************************/
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, buffers[i].cpp,
381                                                  drawable->w,
382                                                  drawable->h,
383                                                  buffers[i].pitch / buffers[i].cpp,
384                                                  buffers[i].name,
385                                                  region_name);
386
387        if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
388           depth_region = region;
389
390        intel_renderbuffer_set_region(intel, rb, region);
391        intel_region_release(&region);
392
393        if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
394           rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
395           if (rb != NULL) {
396              struct intel_region *stencil_region = NULL;
397
398              if (rb->region && rb->region->name == buffers[i].name)
399                    continue;
400
401              intel_region_reference(&stencil_region, region);
402              intel_renderbuffer_set_region(intel, rb, stencil_region);
403              intel_region_release(&stencil_region);
404           }
405        }
406    }
407
408    driUpdateFramebufferSize(&intel->ctx, drawable);
409 }
410
411 /**
412  * intel_prepare_render should be called anywhere that curent read/drawbuffer
413  * state is required.
414  */
415 void
416 intel_prepare_render(struct intel_context *intel)
417 {
418    __DRIcontext *driContext = intel->driContext;
419    __DRIdrawable *drawable;
420
421    drawable = driContext->driDrawablePriv;
422    if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
423       if (drawable->lastStamp != drawable->dri2.stamp)
424          intel_update_renderbuffers(driContext, drawable);
425       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
426       driContext->dri2.draw_stamp = drawable->dri2.stamp;
427    }
428
429    drawable = driContext->driReadablePriv;
430    if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
431       if (drawable->lastStamp != drawable->dri2.stamp)
432          intel_update_renderbuffers(driContext, drawable);
433       driContext->dri2.read_stamp = drawable->dri2.stamp;
434    }
435
436    /* If we're currently rendering to the front buffer, the rendering
437     * that will happen next will probably dirty the front buffer.  So
438     * mark it as dirty here.
439     */
440    if (intel->is_front_buffer_rendering)
441       intel->front_buffer_dirty = GL_TRUE;
442
443    /* Wait for the swapbuffers before the one we just emitted, so we
444     * don't get too many swaps outstanding for apps that are GPU-heavy
445     * but not CPU-heavy.
446     *
447     * We're using intelDRI2Flush (called from the loader before
448     * swapbuffer) and glFlush (for front buffer rendering) as the
449     * indicator that a frame is done and then throttle when we get
450     * here as we prepare to render the next frame.  At this point for
451     * round trips for swap/copy and getting new buffers are done and
452     * we'll spend less time waiting on the GPU.
453     *
454     * Unfortunately, we don't have a handle to the batch containing
455     * the swap, and getting our hands on that doesn't seem worth it,
456     * so we just us the first batch we emitted after the last swap.
457     */
458    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
459       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
460       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
461       intel->first_post_swapbuffers_batch = NULL;
462       intel->need_throttle = GL_FALSE;
463    }
464 }
465
466 static void
467 intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
468 {
469     struct intel_context *intel = intel_context(ctx);
470     __DRIcontext *driContext = intel->driContext;
471
472     if (intel->saved_viewport)
473         intel->saved_viewport(ctx, x, y, w, h);
474
475     if (!intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
476        dri2InvalidateDrawable(driContext->driDrawablePriv);
477        dri2InvalidateDrawable(driContext->driReadablePriv);
478     }
479 }
480
481 static const struct dri_debug_control debug_control[] = {
482    { "tex",   DEBUG_TEXTURE},
483    { "state", DEBUG_STATE},
484    { "ioctl", DEBUG_IOCTL},
485    { "blit",  DEBUG_BLIT},
486    { "mip",   DEBUG_MIPTREE},
487    { "fall",  DEBUG_FALLBACKS},
488    { "verb",  DEBUG_VERBOSE},
489    { "bat",   DEBUG_BATCH},
490    { "pix",   DEBUG_PIXEL},
491    { "buf",   DEBUG_BUFMGR},
492    { "reg",   DEBUG_REGION},
493    { "fbo",   DEBUG_FBO},
494    { "gs",    DEBUG_GS},
495    { "sync",  DEBUG_SYNC},
496    { "prim",  DEBUG_PRIMS },
497    { "vert",  DEBUG_VERTS },
498    { "dri",   DEBUG_DRI },
499    { "sf",    DEBUG_SF },
500    { "san",   DEBUG_SANITY },
501    { "sleep", DEBUG_SLEEP },
502    { "stats", DEBUG_STATS },
503    { "tile",  DEBUG_TILE },
504    { "sing",  DEBUG_SINGLE_THREAD },
505    { "thre",  DEBUG_SINGLE_THREAD },
506    { "wm",    DEBUG_WM },
507    { "glsl_force", DEBUG_GLSL_FORCE },
508    { "urb",   DEBUG_URB },
509    { "vs",    DEBUG_VS },
510    { "clip",  DEBUG_CLIP },
511    { NULL,    0 }
512 };
513
514
515 static void
516 intelInvalidateState(GLcontext * ctx, GLuint new_state)
517 {
518     struct intel_context *intel = intel_context(ctx);
519
520    _swrast_InvalidateState(ctx, new_state);
521    _swsetup_InvalidateState(ctx, new_state);
522    _vbo_InvalidateState(ctx, new_state);
523    _tnl_InvalidateState(ctx, new_state);
524    _tnl_invalidate_vertex_state(ctx, new_state);
525
526    intel->NewGLState |= new_state;
527
528    if (intel->vtbl.invalidate_state)
529       intel->vtbl.invalidate_state( intel, new_state );
530 }
531
532 void
533 intel_flush(GLcontext *ctx)
534 {
535    struct intel_context *intel = intel_context(ctx);
536
537    if (intel->Fallback)
538       _swrast_flush(ctx);
539
540    if (intel->gen < 4)
541       INTEL_FIREVERTICES(intel);
542
543    if (intel->batch->map != intel->batch->ptr)
544       intel_batchbuffer_flush(intel->batch);
545 }
546
547 static void
548 intel_glFlush(GLcontext *ctx)
549 {
550    struct intel_context *intel = intel_context(ctx);
551
552    intel_flush(ctx);
553    intel_flush_front(ctx);
554    intel->need_throttle = GL_TRUE;
555 }
556
557 void
558 intelFinish(GLcontext * ctx)
559 {
560    struct gl_framebuffer *fb = ctx->DrawBuffer;
561    int i;
562
563    intel_flush(ctx);
564    intel_flush_front(ctx);
565
566    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
567        struct intel_renderbuffer *irb;
568
569        irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
570
571        if (irb && irb->region)
572           drm_intel_bo_wait_rendering(irb->region->buffer);
573    }
574    if (fb->_DepthBuffer) {
575       /* XXX: Wait on buffer idle */
576    }
577 }
578
579 void
580 intelInitDriverFunctions(struct dd_function_table *functions)
581 {
582    _mesa_init_driver_functions(functions);
583
584    functions->Flush = intel_glFlush;
585    functions->Finish = intelFinish;
586    functions->GetString = intelGetString;
587    functions->UpdateState = intelInvalidateState;
588
589    intelInitTextureFuncs(functions);
590    intelInitTextureImageFuncs(functions);
591    intelInitTextureSubImageFuncs(functions);
592    intelInitTextureCopyImageFuncs(functions);
593    intelInitStateFuncs(functions);
594    intelInitClearFuncs(functions);
595    intelInitBufferFuncs(functions);
596    intelInitPixelFuncs(functions);
597    intelInitBufferObjectFuncs(functions);
598    intel_init_syncobj_functions(functions);
599 }
600
601
602 GLboolean
603 intelInitContext(struct intel_context *intel,
604                  int api,
605                  const __GLcontextModes * mesaVis,
606                  __DRIcontext * driContextPriv,
607                  void *sharedContextPrivate,
608                  struct dd_function_table *functions)
609 {
610    GLcontext *ctx = &intel->ctx;
611    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
612    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
613    struct intel_screen *intelScreen = sPriv->private;
614    int bo_reuse_mode;
615    __GLcontextModes visual;
616
617    /* we can't do anything without a connection to the device */
618    if (intelScreen->bufmgr == NULL)
619       return GL_FALSE;
620
621    /* Can't rely on invalidate events, fall back to glViewport hack */
622    if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
623       intel->saved_viewport = functions->Viewport;
624       functions->Viewport = intel_viewport;
625    }
626
627    if (mesaVis == NULL) {
628       memset(&visual, 0, sizeof visual);
629       mesaVis = &visual;
630    }
631
632    if (!_mesa_initialize_context_for_api(&intel->ctx, api, mesaVis, shareCtx,
633                                          functions, (void *) intel)) {
634       printf("%s: failed to init mesa context\n", __FUNCTION__);
635       return GL_FALSE;
636    }
637
638    driContextPriv->driverPrivate = intel;
639    intel->intelScreen = intelScreen;
640    intel->driContext = driContextPriv;
641    intel->driFd = sPriv->fd;
642
643    intel->has_xrgb_textures = GL_TRUE;
644    if (IS_GEN6(intel->intelScreen->deviceID)) {
645       intel->gen = 6;
646       intel->needs_ff_sync = GL_TRUE;
647       intel->has_luminance_srgb = GL_TRUE;
648    } else if (IS_GEN5(intel->intelScreen->deviceID)) {
649       intel->gen = 5;
650       intel->needs_ff_sync = GL_TRUE;
651       intel->has_luminance_srgb = GL_TRUE;
652    } else if (IS_965(intel->intelScreen->deviceID)) {
653       intel->gen = 4;
654       if (IS_G4X(intel->intelScreen->deviceID)) {
655           intel->has_luminance_srgb = GL_TRUE;
656           intel->is_g4x = GL_TRUE;
657       }
658    } else if (IS_9XX(intel->intelScreen->deviceID)) {
659       intel->gen = 3;
660       if (IS_945(intel->intelScreen->deviceID)) {
661          intel->is_945 = GL_TRUE;
662       }
663    } else {
664       intel->gen = 2;
665       if (intel->intelScreen->deviceID == PCI_CHIP_I830_M ||
666           intel->intelScreen->deviceID == PCI_CHIP_845_G) {
667          intel->has_xrgb_textures = GL_FALSE;
668       }
669    }
670
671    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
672                        sPriv->myNum, (intel->gen >= 4) ? "i965" : "i915");
673    if (intelScreen->deviceID == PCI_CHIP_I865_G)
674       intel->maxBatchSize = 4096;
675    else
676       intel->maxBatchSize = BATCH_SZ;
677
678    intel->bufmgr = intelScreen->bufmgr;
679
680    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
681    switch (bo_reuse_mode) {
682    case DRI_CONF_BO_REUSE_DISABLED:
683       break;
684    case DRI_CONF_BO_REUSE_ALL:
685       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
686       break;
687    }
688
689    /* This doesn't yet catch all non-conformant rendering, but it's a
690     * start.
691     */
692    if (getenv("INTEL_STRICT_CONFORMANCE")) {
693       unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
694       if (value > 0) {
695          intel->conformance_mode = value;
696       }
697       else {
698          intel->conformance_mode = 1;
699       }
700    }
701
702    if (intel->conformance_mode > 0) {
703       ctx->Const.MinLineWidth = 1.0;
704       ctx->Const.MinLineWidthAA = 1.0;
705       ctx->Const.MaxLineWidth = 1.0;
706       ctx->Const.MaxLineWidthAA = 1.0;
707       ctx->Const.LineWidthGranularity = 1.0;
708    }
709    else {
710       ctx->Const.MinLineWidth = 1.0;
711       ctx->Const.MinLineWidthAA = 1.0;
712       ctx->Const.MaxLineWidth = 5.0;
713       ctx->Const.MaxLineWidthAA = 5.0;
714       ctx->Const.LineWidthGranularity = 0.5;
715    }
716
717    ctx->Const.MinPointSize = 1.0;
718    ctx->Const.MinPointSizeAA = 1.0;
719    ctx->Const.MaxPointSize = 255.0;
720    ctx->Const.MaxPointSizeAA = 3.0;
721    ctx->Const.PointSizeGranularity = 1.0;
722
723    /* reinitialize the context point state.
724     * It depend on constants in __GLcontextRec::Const
725     */
726    _mesa_init_point(ctx);
727
728    meta_init_metaops(ctx, &intel->meta);
729    if (intel->gen >= 4) {
730       if (MAX_WIDTH > 8192)
731          ctx->Const.MaxRenderbufferSize = 8192;
732    } else {
733       if (MAX_WIDTH > 2048)
734          ctx->Const.MaxRenderbufferSize = 2048;
735    }
736
737    /* Initialize the software rasterizer and helper modules. */
738    _swrast_CreateContext(ctx);
739    _vbo_CreateContext(ctx);
740    _tnl_CreateContext(ctx);
741    _swsetup_CreateContext(ctx);
742  
743    /* Configure swrast to match hardware characteristics: */
744    _swrast_allow_pixel_fog(ctx, GL_FALSE);
745    _swrast_allow_vertex_fog(ctx, GL_TRUE);
746
747    _mesa_meta_init(ctx);
748
749    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
750    intel->hw_stipple = 1;
751
752    /* XXX FBO: this doesn't seem to be used anywhere */
753    switch (mesaVis->depthBits) {
754    case 0:                     /* what to do in this case? */
755    case 16:
756       intel->polygon_offset_scale = 1.0;
757       break;
758    case 24:
759       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
760       break;
761    default:
762       assert(0);
763       break;
764    }
765
766    if (intel->gen >= 4)
767       intel->polygon_offset_scale /= 0xffff;
768
769    intel->RenderIndex = ~0;
770
771    switch (ctx->API) {
772    case API_OPENGL:
773       intelInitExtensions(ctx);
774       break;
775    case API_OPENGLES:
776       break;
777    case API_OPENGLES2:
778       intelInitExtensionsES2(ctx);
779       break;
780    }
781
782    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
783    if (INTEL_DEBUG & DEBUG_BUFMGR)
784       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
785
786    intel->batch = intel_batchbuffer_alloc(intel);
787
788    intel_fbo_init(intel);
789
790    if (intel->ctx.Mesa_DXTn) {
791       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
792       _mesa_enable_extension(ctx, "GL_S3_s3tc");
793    }
794    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
795       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
796    }
797    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
798                                                "texture_tiling");
799    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
800
801    intel->prim.primitive = ~0;
802
803    /* Force all software fallbacks */
804    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
805       fprintf(stderr, "disabling 3D rasterization\n");
806       intel->no_rast = 1;
807    }
808
809    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
810       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
811       intel->always_flush_batch = 1;
812    }
813
814    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
815       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
816       intel->always_flush_cache = 1;
817    }
818
819    /* Disable all hardware rendering (skip emitting batches and fences/waits
820     * to the kernel)
821     */
822    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
823
824    return GL_TRUE;
825 }
826
827 void
828 intelDestroyContext(__DRIcontext * driContextPriv)
829 {
830    struct intel_context *intel =
831       (struct intel_context *) driContextPriv->driverPrivate;
832
833    assert(intel);               /* should never be null */
834    if (intel) {
835       INTEL_FIREVERTICES(intel);
836
837       _mesa_meta_free(&intel->ctx);
838
839       meta_destroy_metaops(&intel->meta);
840
841       intel->vtbl.destroy(intel);
842
843       _swsetup_DestroyContext(&intel->ctx);
844       _tnl_DestroyContext(&intel->ctx);
845       _vbo_DestroyContext(&intel->ctx);
846
847       _swrast_DestroyContext(&intel->ctx);
848       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
849
850       intel_batchbuffer_free(intel->batch);
851       intel->batch = NULL;
852
853       free(intel->prim.vb);
854       intel->prim.vb = NULL;
855       drm_intel_bo_unreference(intel->prim.vb_bo);
856       intel->prim.vb_bo = NULL;
857       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
858       intel->first_post_swapbuffers_batch = NULL;
859
860       driDestroyOptionCache(&intel->optionCache);
861
862       /* free the Mesa context */
863       _mesa_free_context_data(&intel->ctx);
864
865       FREE(intel);
866       driContextPriv->driverPrivate = NULL;
867    }
868 }
869
870 GLboolean
871 intelUnbindContext(__DRIcontext * driContextPriv)
872 {
873    return GL_TRUE;
874 }
875
876 GLboolean
877 intelMakeCurrent(__DRIcontext * driContextPriv,
878                  __DRIdrawable * driDrawPriv,
879                  __DRIdrawable * driReadPriv)
880 {
881    struct intel_context *intel;
882    GET_CURRENT_CONTEXT(curCtx);
883
884    if (driContextPriv)
885       intel = (struct intel_context *) driContextPriv->driverPrivate;
886    else
887       intel = NULL;
888
889    /* According to the glXMakeCurrent() man page: "Pending commands to
890     * the previous context, if any, are flushed before it is released."
891     * But only flush if we're actually changing contexts.
892     */
893    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
894       _mesa_flush(curCtx);
895    }
896
897    if (driContextPriv) {
898       struct gl_framebuffer *fb, *readFb;
899       
900       if (driDrawPriv == NULL && driReadPriv == NULL) {
901          fb = _mesa_get_incomplete_framebuffer();
902          readFb = _mesa_get_incomplete_framebuffer();
903       } else {
904          fb = driDrawPriv->driverPrivate;
905          readFb = driReadPriv->driverPrivate;
906          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
907          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
908       }
909
910       intel_prepare_render(intel);
911       _mesa_make_current(&intel->ctx, fb, readFb);
912       
913       /* We do this in intel_prepare_render() too, but intel->ctx.DrawBuffer
914        * is NULL at that point.  We can't call _mesa_makecurrent()
915        * first, since we need the buffer size for the initial
916        * viewport.  So just call intel_draw_buffer() again here. */
917       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
918    }
919    else {
920       _mesa_make_current(NULL, NULL, NULL);
921    }
922
923    return GL_TRUE;
924 }