1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
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 #include "main/renderbuffer.h"
38 #include "swrast/swrast.h"
39 #include "swrast_setup/swrast_setup.h"
41 #include "drivers/common/driverfuncs.h"
42 #include "drivers/common/meta.h"
44 #include "intel_chipset.h"
45 #include "intel_buffers.h"
46 #include "intel_tex.h"
47 #include "intel_batchbuffer.h"
48 #include "intel_clear.h"
49 #include "intel_extensions.h"
50 #include "intel_pixel.h"
51 #include "intel_regions.h"
52 #include "intel_buffer_objects.h"
53 #include "intel_fbo.h"
54 #include "intel_bufmgr.h"
55 #include "intel_screen.h"
57 #include "drirenderbuffer.h"
59 #include "../glsl/ralloc.h"
62 int INTEL_DEBUG
= (0);
66 static const GLubyte
*
67 intelGetString(struct gl_context
* ctx
, GLenum name
)
69 const struct intel_context
*const intel
= intel_context(ctx
);
71 static char buffer
[128];
75 return (GLubyte
*) "Tungsten Graphics, Inc";
79 switch (intel
->intelScreen
->deviceID
) {
81 chipset
= "Intel(R) 845G";
84 chipset
= "Intel(R) 830M";
86 case PCI_CHIP_I855_GM
:
87 chipset
= "Intel(R) 852GM/855GM";
90 chipset
= "Intel(R) 865G";
93 chipset
= "Intel(R) 915G";
95 case PCI_CHIP_E7221_G
:
96 chipset
= "Intel (R) E7221G (i915)";
98 case PCI_CHIP_I915_GM
:
99 chipset
= "Intel(R) 915GM";
101 case PCI_CHIP_I945_G
:
102 chipset
= "Intel(R) 945G";
104 case PCI_CHIP_I945_GM
:
105 chipset
= "Intel(R) 945GM";
107 case PCI_CHIP_I945_GME
:
108 chipset
= "Intel(R) 945GME";
111 chipset
= "Intel(R) G33";
114 chipset
= "Intel(R) Q35";
117 chipset
= "Intel(R) Q33";
119 case PCI_CHIP_IGD_GM
:
121 chipset
= "Intel(R) IGD";
123 case PCI_CHIP_I965_Q
:
124 chipset
= "Intel(R) 965Q";
126 case PCI_CHIP_I965_G
:
127 case PCI_CHIP_I965_G_1
:
128 chipset
= "Intel(R) 965G";
130 case PCI_CHIP_I946_GZ
:
131 chipset
= "Intel(R) 946GZ";
133 case PCI_CHIP_I965_GM
:
134 chipset
= "Intel(R) 965GM";
136 case PCI_CHIP_I965_GME
:
137 chipset
= "Intel(R) 965GME/GLE";
139 case PCI_CHIP_GM45_GM
:
140 chipset
= "Mobile IntelĀ® GM45 Express Chipset";
142 case PCI_CHIP_IGD_E_G
:
143 chipset
= "Intel(R) Integrated Graphics Device";
146 chipset
= "Intel(R) G45/G43";
149 chipset
= "Intel(R) Q45/Q43";
152 chipset
= "Intel(R) G41";
155 case PCI_CHIP_B43_G1
:
156 chipset
= "Intel(R) B43";
159 chipset
= "Intel(R) Ironlake Desktop";
162 chipset
= "Intel(R) Ironlake Mobile";
164 case PCI_CHIP_SANDYBRIDGE_GT1
:
165 case PCI_CHIP_SANDYBRIDGE_GT2
:
166 case PCI_CHIP_SANDYBRIDGE_GT2_PLUS
:
167 chipset
= "Intel(R) Sandybridge Desktop";
169 case PCI_CHIP_SANDYBRIDGE_M_GT1
:
170 case PCI_CHIP_SANDYBRIDGE_M_GT2
:
171 case PCI_CHIP_SANDYBRIDGE_M_GT2_PLUS
:
172 chipset
= "Intel(R) Sandybridge Mobile";
174 case PCI_CHIP_SANDYBRIDGE_S
:
175 chipset
= "Intel(R) Sandybridge Server";
177 case PCI_CHIP_IVYBRIDGE_GT1
:
178 case PCI_CHIP_IVYBRIDGE_GT2
:
179 chipset
= "Intel(R) Ivybridge Desktop";
181 case PCI_CHIP_IVYBRIDGE_M_GT1
:
182 case PCI_CHIP_IVYBRIDGE_M_GT2
:
183 chipset
= "Intel(R) Ivybridge Mobile";
185 case PCI_CHIP_IVYBRIDGE_S_GT1
:
186 chipset
= "Intel(R) Ivybridge Server";
189 chipset
= "Unknown Intel Chipset";
193 (void) driGetRendererString(buffer
, chipset
, 0);
194 return (GLubyte
*) buffer
;
202 intel_flush_front(struct gl_context
*ctx
)
204 struct intel_context
*intel
= intel_context(ctx
);
205 __DRIcontext
*driContext
= intel
->driContext
;
206 __DRIscreen
*const screen
= intel
->intelScreen
->driScrnPriv
;
208 if ((ctx
->DrawBuffer
->Name
== 0) && intel
->front_buffer_dirty
) {
209 if (screen
->dri2
.loader
&&
210 (screen
->dri2
.loader
->base
.version
>= 2)
211 && (screen
->dri2
.loader
->flushFrontBuffer
!= NULL
) &&
212 driContext
->driDrawablePriv
&&
213 driContext
->driDrawablePriv
->loaderPrivate
) {
214 (*screen
->dri2
.loader
->flushFrontBuffer
)(driContext
->driDrawablePriv
,
215 driContext
->driDrawablePriv
->loaderPrivate
);
217 /* We set the dirty bit in intel_prepare_render() if we're
218 * front buffer rendering once we get there.
220 intel
->front_buffer_dirty
= false;
226 intel_bits_per_pixel(const struct intel_renderbuffer
*rb
)
228 return _mesa_get_format_bytes(rb
->Base
.Format
) * 8;
232 intel_query_dri2_buffers_no_separate_stencil(struct intel_context
*intel
,
233 __DRIdrawable
*drawable
,
234 __DRIbuffer
**buffers
,
238 intel_process_dri2_buffer_no_separate_stencil(struct intel_context
*intel
,
239 __DRIdrawable
*drawable
,
241 struct intel_renderbuffer
*rb
,
242 const char *buffer_name
);
245 intel_query_dri2_buffers_with_separate_stencil(struct intel_context
*intel
,
246 __DRIdrawable
*drawable
,
247 __DRIbuffer
**buffers
,
248 unsigned **attachments
,
252 intel_process_dri2_buffer_with_separate_stencil(struct intel_context
*intel
,
253 __DRIdrawable
*drawable
,
255 struct intel_renderbuffer
*rb
,
256 const char *buffer_name
);
258 intel_verify_dri2_has_hiz(struct intel_context
*intel
,
259 __DRIdrawable
*drawable
,
260 __DRIbuffer
**buffers
,
261 unsigned **attachments
,
265 intel_update_renderbuffers(__DRIcontext
*context
, __DRIdrawable
*drawable
)
267 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
268 struct intel_renderbuffer
*rb
;
269 struct intel_context
*intel
= context
->driverPrivate
;
270 __DRIbuffer
*buffers
= NULL
;
271 unsigned *attachments
= NULL
;
273 const char *region_name
;
275 bool try_separate_stencil
=
276 intel
->has_separate_stencil
&&
277 intel
->intelScreen
->dri2_has_hiz
!= INTEL_DRI2_HAS_HIZ_FALSE
&&
278 intel
->intelScreen
->driScrnPriv
->dri2
.loader
!= NULL
&&
279 intel
->intelScreen
->driScrnPriv
->dri2
.loader
->base
.version
> 2 &&
280 intel
->intelScreen
->driScrnPriv
->dri2
.loader
->getBuffersWithFormat
!= NULL
;
282 assert(!intel
->must_use_separate_stencil
|| try_separate_stencil
);
284 /* If we're rendering to the fake front buffer, make sure all the
285 * pending drawing has landed on the real front buffer. Otherwise
286 * when we eventually get to DRI2GetBuffersWithFormat the stale
287 * real front buffer contents will get copied to the new fake front
290 if (intel
->is_front_buffer_rendering
) {
291 intel_flush(&intel
->ctx
);
292 intel_flush_front(&intel
->ctx
);
295 /* Set this up front, so that in case our buffers get invalidated
296 * while we're getting new buffers, we don't clobber the stamp and
297 * thus ignore the invalidate. */
298 drawable
->lastStamp
= drawable
->dri2
.stamp
;
300 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
))
301 fprintf(stderr
, "enter %s, drawable %p\n", __func__
, drawable
);
303 if (try_separate_stencil
) {
304 intel_query_dri2_buffers_with_separate_stencil(intel
, drawable
, &buffers
,
305 &attachments
, &count
);
307 intel_query_dri2_buffers_no_separate_stencil(intel
, drawable
, &buffers
,
318 drawable
->numClipRects
= 1;
319 drawable
->pClipRects
[0].x1
= 0;
320 drawable
->pClipRects
[0].y1
= 0;
321 drawable
->pClipRects
[0].x2
= drawable
->w
;
322 drawable
->pClipRects
[0].y2
= drawable
->h
;
323 drawable
->numBackClipRects
= 1;
324 drawable
->pBackClipRects
[0].x1
= 0;
325 drawable
->pBackClipRects
[0].y1
= 0;
326 drawable
->pBackClipRects
[0].x2
= drawable
->w
;
327 drawable
->pBackClipRects
[0].y2
= drawable
->h
;
329 for (i
= 0; i
< count
; i
++) {
330 switch (buffers
[i
].attachment
) {
331 case __DRI_BUFFER_FRONT_LEFT
:
332 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
333 region_name
= "dri2 front buffer";
336 case __DRI_BUFFER_FAKE_FRONT_LEFT
:
337 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
338 region_name
= "dri2 fake front buffer";
341 case __DRI_BUFFER_BACK_LEFT
:
342 rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
343 region_name
= "dri2 back buffer";
346 case __DRI_BUFFER_DEPTH
:
347 rb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
348 region_name
= "dri2 depth buffer";
351 case __DRI_BUFFER_HIZ
:
352 /* The hiz region resides in the depth renderbuffer. */
353 rb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
354 region_name
= "dri2 hiz buffer";
357 case __DRI_BUFFER_DEPTH_STENCIL
:
358 rb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
359 region_name
= "dri2 depth / stencil buffer";
362 case __DRI_BUFFER_STENCIL
:
363 rb
= intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
364 region_name
= "dri2 stencil buffer";
367 case __DRI_BUFFER_ACCUM
:
370 "unhandled buffer attach event, attachment type %d\n",
371 buffers
[i
].attachment
);
375 if (try_separate_stencil
) {
376 intel_process_dri2_buffer_with_separate_stencil(intel
, drawable
,
380 intel_process_dri2_buffer_no_separate_stencil(intel
, drawable
,
386 if (try_separate_stencil
387 && intel
->intelScreen
->dri2_has_hiz
== INTEL_DRI2_HAS_HIZ_UNKNOWN
) {
388 intel_verify_dri2_has_hiz(intel
, drawable
, &buffers
, &attachments
,
395 driUpdateFramebufferSize(&intel
->ctx
, drawable
);
399 * intel_prepare_render should be called anywhere that curent read/drawbuffer
403 intel_prepare_render(struct intel_context
*intel
)
405 __DRIcontext
*driContext
= intel
->driContext
;
406 __DRIdrawable
*drawable
;
408 drawable
= driContext
->driDrawablePriv
;
409 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.draw_stamp
) {
410 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
411 intel_update_renderbuffers(driContext
, drawable
);
412 intel_draw_buffer(&intel
->ctx
);
413 driContext
->dri2
.draw_stamp
= drawable
->dri2
.stamp
;
416 drawable
= driContext
->driReadablePriv
;
417 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.read_stamp
) {
418 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
419 intel_update_renderbuffers(driContext
, drawable
);
420 driContext
->dri2
.read_stamp
= drawable
->dri2
.stamp
;
423 /* If we're currently rendering to the front buffer, the rendering
424 * that will happen next will probably dirty the front buffer. So
425 * mark it as dirty here.
427 if (intel
->is_front_buffer_rendering
)
428 intel
->front_buffer_dirty
= true;
430 /* Wait for the swapbuffers before the one we just emitted, so we
431 * don't get too many swaps outstanding for apps that are GPU-heavy
434 * We're using intelDRI2Flush (called from the loader before
435 * swapbuffer) and glFlush (for front buffer rendering) as the
436 * indicator that a frame is done and then throttle when we get
437 * here as we prepare to render the next frame. At this point for
438 * round trips for swap/copy and getting new buffers are done and
439 * we'll spend less time waiting on the GPU.
441 * Unfortunately, we don't have a handle to the batch containing
442 * the swap, and getting our hands on that doesn't seem worth it,
443 * so we just us the first batch we emitted after the last swap.
445 if (intel
->need_throttle
&& intel
->first_post_swapbuffers_batch
) {
446 drm_intel_bo_wait_rendering(intel
->first_post_swapbuffers_batch
);
447 drm_intel_bo_unreference(intel
->first_post_swapbuffers_batch
);
448 intel
->first_post_swapbuffers_batch
= NULL
;
449 intel
->need_throttle
= false;
454 intel_viewport(struct gl_context
*ctx
, GLint x
, GLint y
, GLsizei w
, GLsizei h
)
456 struct intel_context
*intel
= intel_context(ctx
);
457 __DRIcontext
*driContext
= intel
->driContext
;
459 if (intel
->saved_viewport
)
460 intel
->saved_viewport(ctx
, x
, y
, w
, h
);
462 if (ctx
->DrawBuffer
->Name
== 0) {
463 dri2InvalidateDrawable(driContext
->driDrawablePriv
);
464 dri2InvalidateDrawable(driContext
->driReadablePriv
);
468 static const struct dri_debug_control debug_control
[] = {
469 { "tex", DEBUG_TEXTURE
},
470 { "state", DEBUG_STATE
},
471 { "ioctl", DEBUG_IOCTL
},
472 { "blit", DEBUG_BLIT
},
473 { "mip", DEBUG_MIPTREE
},
474 { "fall", DEBUG_FALLBACKS
},
475 { "verb", DEBUG_VERBOSE
},
476 { "bat", DEBUG_BATCH
},
477 { "pix", DEBUG_PIXEL
},
478 { "buf", DEBUG_BUFMGR
},
479 { "reg", DEBUG_REGION
},
482 { "sync", DEBUG_SYNC
},
483 { "prim", DEBUG_PRIMS
},
484 { "vert", DEBUG_VERTS
},
485 { "dri", DEBUG_DRI
},
487 { "san", DEBUG_SANITY
},
488 { "sleep", DEBUG_SLEEP
},
489 { "stats", DEBUG_STATS
},
490 { "tile", DEBUG_TILE
},
491 { "sing", DEBUG_SINGLE_THREAD
},
492 { "thre", DEBUG_SINGLE_THREAD
},
494 { "urb", DEBUG_URB
},
496 { "clip", DEBUG_CLIP
},
502 intelInvalidateState(struct gl_context
* ctx
, GLuint new_state
)
504 struct intel_context
*intel
= intel_context(ctx
);
506 _swrast_InvalidateState(ctx
, new_state
);
507 _vbo_InvalidateState(ctx
, new_state
);
509 intel
->NewGLState
|= new_state
;
511 if (intel
->vtbl
.invalidate_state
)
512 intel
->vtbl
.invalidate_state( intel
, new_state
);
516 intel_flush(struct gl_context
*ctx
)
518 struct intel_context
*intel
= intel_context(ctx
);
524 INTEL_FIREVERTICES(intel
);
526 if (intel
->batch
.used
)
527 intel_batchbuffer_flush(intel
);
531 intel_glFlush(struct gl_context
*ctx
)
533 struct intel_context
*intel
= intel_context(ctx
);
536 intel_flush_front(ctx
);
537 if (intel
->is_front_buffer_rendering
)
538 intel
->need_throttle
= true;
542 intelFinish(struct gl_context
* ctx
)
544 struct intel_context
*intel
= intel_context(ctx
);
547 intel_flush_front(ctx
);
549 if (intel
->batch
.last_bo
)
550 drm_intel_bo_wait_rendering(intel
->batch
.last_bo
);
554 intelInitDriverFunctions(struct dd_function_table
*functions
)
556 _mesa_init_driver_functions(functions
);
558 functions
->Flush
= intel_glFlush
;
559 functions
->Finish
= intelFinish
;
560 functions
->GetString
= intelGetString
;
561 functions
->UpdateState
= intelInvalidateState
;
563 intelInitTextureFuncs(functions
);
564 intelInitTextureImageFuncs(functions
);
565 intelInitTextureSubImageFuncs(functions
);
566 intelInitTextureCopyImageFuncs(functions
);
567 intelInitStateFuncs(functions
);
568 intelInitClearFuncs(functions
);
569 intelInitBufferFuncs(functions
);
570 intelInitPixelFuncs(functions
);
571 intelInitBufferObjectFuncs(functions
);
572 intel_init_syncobj_functions(functions
);
576 intelInitContext(struct intel_context
*intel
,
578 const struct gl_config
* mesaVis
,
579 __DRIcontext
* driContextPriv
,
580 void *sharedContextPrivate
,
581 struct dd_function_table
*functions
)
583 struct gl_context
*ctx
= &intel
->ctx
;
584 struct gl_context
*shareCtx
= (struct gl_context
*) sharedContextPrivate
;
585 __DRIscreen
*sPriv
= driContextPriv
->driScreenPriv
;
586 struct intel_screen
*intelScreen
= sPriv
->private;
588 struct gl_config visual
;
590 /* we can't do anything without a connection to the device */
591 if (intelScreen
->bufmgr
== NULL
)
594 /* Can't rely on invalidate events, fall back to glViewport hack */
595 if (!driContextPriv
->driScreenPriv
->dri2
.useInvalidate
) {
596 intel
->saved_viewport
= functions
->Viewport
;
597 functions
->Viewport
= intel_viewport
;
600 if (mesaVis
== NULL
) {
601 memset(&visual
, 0, sizeof visual
);
605 if (!_mesa_initialize_context(&intel
->ctx
, api
, mesaVis
, shareCtx
,
606 functions
, (void *) intel
)) {
607 printf("%s: failed to init mesa context\n", __FUNCTION__
);
611 driContextPriv
->driverPrivate
= intel
;
612 intel
->intelScreen
= intelScreen
;
613 intel
->driContext
= driContextPriv
;
614 intel
->driFd
= sPriv
->fd
;
616 intel
->gen
= intelScreen
->gen
;
618 const int devID
= intelScreen
->deviceID
;
620 if (IS_SNB_GT1(devID
) || IS_IVB_GT1(devID
))
622 else if (IS_SNB_GT2(devID
) || IS_IVB_GT2(devID
))
628 intel
->is_g4x
= true;
629 } else if (IS_945(devID
)) {
630 intel
->is_945
= true;
633 if (intel
->gen
>= 5) {
634 intel
->needs_ff_sync
= true;
637 intel
->has_separate_stencil
= intel
->intelScreen
->hw_has_separate_stencil
;
638 intel
->must_use_separate_stencil
= intel
->intelScreen
->hw_must_use_separate_stencil
;
639 intel
->has_hiz
= intel
->intelScreen
->hw_has_hiz
;
641 memset(&ctx
->TextureFormatSupported
, 0,
642 sizeof(ctx
->TextureFormatSupported
));
643 ctx
->TextureFormatSupported
[MESA_FORMAT_ARGB8888
] = true;
644 if (devID
!= PCI_CHIP_I830_M
&& devID
!= PCI_CHIP_845_G
)
645 ctx
->TextureFormatSupported
[MESA_FORMAT_XRGB8888
] = true;
646 ctx
->TextureFormatSupported
[MESA_FORMAT_ARGB4444
] = true;
647 ctx
->TextureFormatSupported
[MESA_FORMAT_ARGB1555
] = true;
648 ctx
->TextureFormatSupported
[MESA_FORMAT_RGB565
] = true;
649 ctx
->TextureFormatSupported
[MESA_FORMAT_L8
] = true;
650 ctx
->TextureFormatSupported
[MESA_FORMAT_A8
] = true;
651 ctx
->TextureFormatSupported
[MESA_FORMAT_I8
] = true;
652 ctx
->TextureFormatSupported
[MESA_FORMAT_AL88
] = true;
654 ctx
->TextureFormatSupported
[MESA_FORMAT_AL1616
] = true;
656 /* Depth and stencil */
657 ctx
->TextureFormatSupported
[MESA_FORMAT_S8_Z24
] = true;
658 ctx
->TextureFormatSupported
[MESA_FORMAT_X8_Z24
] = true;
659 ctx
->TextureFormatSupported
[MESA_FORMAT_S8
] = intel
->has_separate_stencil
;
662 * This was disabled in initial FBO enabling to avoid combinations
663 * of depth+stencil that wouldn't work together. We since decided
664 * that it was OK, since it's up to the app to come up with the
665 * combo that actually works, so this can probably be re-enabled.
668 ctx->TextureFormatSupported[MESA_FORMAT_Z16] = true;
669 ctx->TextureFormatSupported[MESA_FORMAT_Z24] = true;
672 /* ctx->Extensions.MESA_ycbcr_texture */
673 ctx
->TextureFormatSupported
[MESA_FORMAT_YCBCR
] = true;
674 ctx
->TextureFormatSupported
[MESA_FORMAT_YCBCR_REV
] = true;
676 /* GL_3DFX_texture_compression_FXT1 */
677 ctx
->TextureFormatSupported
[MESA_FORMAT_RGB_FXT1
] = true;
678 ctx
->TextureFormatSupported
[MESA_FORMAT_RGBA_FXT1
] = true;
680 /* GL_EXT_texture_compression_s3tc */
681 ctx
->TextureFormatSupported
[MESA_FORMAT_RGB_DXT1
] = true;
682 ctx
->TextureFormatSupported
[MESA_FORMAT_RGBA_DXT1
] = true;
683 ctx
->TextureFormatSupported
[MESA_FORMAT_RGBA_DXT3
] = true;
684 ctx
->TextureFormatSupported
[MESA_FORMAT_RGBA_DXT5
] = true;
687 /* GL_ARB_texture_compression_rgtc */
688 ctx
->TextureFormatSupported
[MESA_FORMAT_RED_RGTC1
] = true;
689 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_RED_RGTC1
] = true;
690 ctx
->TextureFormatSupported
[MESA_FORMAT_RG_RGTC2
] = true;
691 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_RG_RGTC2
] = true;
693 /* GL_ARB_texture_rg */
694 ctx
->TextureFormatSupported
[MESA_FORMAT_R8
] = true;
695 ctx
->TextureFormatSupported
[MESA_FORMAT_R16
] = true;
696 ctx
->TextureFormatSupported
[MESA_FORMAT_RG88
] = true;
697 ctx
->TextureFormatSupported
[MESA_FORMAT_RG1616
] = true;
699 /* GL_MESA_texture_signed_rgba / GL_EXT_texture_snorm */
700 ctx
->TextureFormatSupported
[MESA_FORMAT_DUDV8
] = true;
701 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_RGBA8888_REV
] = true;
702 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_R8
] = true;
703 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_RG88_REV
] = true;
704 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_R16
] = true;
705 ctx
->TextureFormatSupported
[MESA_FORMAT_SIGNED_GR1616
] = true;
707 /* GL_EXT_texture_sRGB */
708 ctx
->TextureFormatSupported
[MESA_FORMAT_SARGB8
] = true;
709 if (intel
->gen
>= 5 || intel
->is_g4x
)
710 ctx
->TextureFormatSupported
[MESA_FORMAT_SRGB_DXT1
] = true;
711 ctx
->TextureFormatSupported
[MESA_FORMAT_SRGBA_DXT1
] = true;
712 ctx
->TextureFormatSupported
[MESA_FORMAT_SRGBA_DXT3
] = true;
713 ctx
->TextureFormatSupported
[MESA_FORMAT_SRGBA_DXT5
] = true;
714 if (intel
->gen
>= 5 || intel
->is_g4x
) {
715 ctx
->TextureFormatSupported
[MESA_FORMAT_SL8
] = true;
716 ctx
->TextureFormatSupported
[MESA_FORMAT_SLA8
] = true;
719 #ifdef TEXTURE_FLOAT_ENABLED
720 ctx
->TextureFormatSupported
[MESA_FORMAT_RGBA_FLOAT32
] = true;
721 ctx
->TextureFormatSupported
[MESA_FORMAT_RG_FLOAT32
] = true;
722 ctx
->TextureFormatSupported
[MESA_FORMAT_R_FLOAT32
] = true;
723 ctx
->TextureFormatSupported
[MESA_FORMAT_INTENSITY_FLOAT32
] = true;
724 ctx
->TextureFormatSupported
[MESA_FORMAT_LUMINANCE_FLOAT32
] = true;
725 ctx
->TextureFormatSupported
[MESA_FORMAT_ALPHA_FLOAT32
] = true;
726 ctx
->TextureFormatSupported
[MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32
] = true;
728 /* GL_EXT_texture_shared_exponent */
729 ctx
->TextureFormatSupported
[MESA_FORMAT_RGB9_E5_FLOAT
] = true;
731 /* GL_EXT_packed_float */
732 ctx
->TextureFormatSupported
[MESA_FORMAT_R11_G11_B10_FLOAT
] = true;
737 driParseConfigFiles(&intel
->optionCache
, &intelScreen
->optionCache
,
738 sPriv
->myNum
, (intel
->gen
>= 4) ? "i965" : "i915");
740 intel
->maxBatchSize
= 4096;
742 intel
->maxBatchSize
= sizeof(intel
->batch
.map
);
744 intel
->bufmgr
= intelScreen
->bufmgr
;
746 bo_reuse_mode
= driQueryOptioni(&intel
->optionCache
, "bo_reuse");
747 switch (bo_reuse_mode
) {
748 case DRI_CONF_BO_REUSE_DISABLED
:
750 case DRI_CONF_BO_REUSE_ALL
:
751 intel_bufmgr_gem_enable_reuse(intel
->bufmgr
);
755 /* This doesn't yet catch all non-conformant rendering, but it's a
758 if (getenv("INTEL_STRICT_CONFORMANCE")) {
759 unsigned int value
= atoi(getenv("INTEL_STRICT_CONFORMANCE"));
761 intel
->conformance_mode
= value
;
764 intel
->conformance_mode
= 1;
768 if (intel
->conformance_mode
> 0) {
769 ctx
->Const
.MinLineWidth
= 1.0;
770 ctx
->Const
.MinLineWidthAA
= 1.0;
771 ctx
->Const
.MaxLineWidth
= 1.0;
772 ctx
->Const
.MaxLineWidthAA
= 1.0;
773 ctx
->Const
.LineWidthGranularity
= 1.0;
776 ctx
->Const
.MinLineWidth
= 1.0;
777 ctx
->Const
.MinLineWidthAA
= 1.0;
778 ctx
->Const
.MaxLineWidth
= 5.0;
779 ctx
->Const
.MaxLineWidthAA
= 5.0;
780 ctx
->Const
.LineWidthGranularity
= 0.5;
783 ctx
->Const
.MinPointSize
= 1.0;
784 ctx
->Const
.MinPointSizeAA
= 1.0;
785 ctx
->Const
.MaxPointSize
= 255.0;
786 ctx
->Const
.MaxPointSizeAA
= 3.0;
787 ctx
->Const
.PointSizeGranularity
= 1.0;
789 ctx
->Const
.MaxSamples
= 1.0;
792 ctx
->Const
.MaxClipPlanes
= 8;
794 /* reinitialize the context point state.
795 * It depend on constants in __struct gl_contextRec::Const
797 _mesa_init_point(ctx
);
799 if (intel
->gen
>= 4) {
800 ctx
->Const
.sRGBCapable
= true;
801 if (MAX_WIDTH
> 8192)
802 ctx
->Const
.MaxRenderbufferSize
= 8192;
804 if (MAX_WIDTH
> 2048)
805 ctx
->Const
.MaxRenderbufferSize
= 2048;
808 /* Initialize the software rasterizer and helper modules. */
809 _swrast_CreateContext(ctx
);
810 _vbo_CreateContext(ctx
);
811 _tnl_CreateContext(ctx
);
812 _swsetup_CreateContext(ctx
);
814 /* Configure swrast to match hardware characteristics: */
815 _swrast_allow_pixel_fog(ctx
, false);
816 _swrast_allow_vertex_fog(ctx
, true);
818 _mesa_meta_init(ctx
);
820 intel
->hw_stencil
= mesaVis
->stencilBits
&& mesaVis
->depthBits
== 24;
821 intel
->hw_stipple
= 1;
823 /* XXX FBO: this doesn't seem to be used anywhere */
824 switch (mesaVis
->depthBits
) {
825 case 0: /* what to do in this case? */
827 intel
->polygon_offset_scale
= 1.0;
830 intel
->polygon_offset_scale
= 2.0; /* req'd to pass glean */
838 intel
->polygon_offset_scale
/= 0xffff;
840 intel
->RenderIndex
= ~0;
844 intelInitExtensions(ctx
);
847 intelInitExtensionsES1(ctx
);
850 intelInitExtensionsES2(ctx
);
854 INTEL_DEBUG
= driParseDebugString(getenv("INTEL_DEBUG"), debug_control
);
855 if (INTEL_DEBUG
& DEBUG_BUFMGR
)
856 dri_bufmgr_set_debug(intel
->bufmgr
, true);
858 intel_batchbuffer_init(intel
);
860 intel_fbo_init(intel
);
862 intel
->use_texture_tiling
= driQueryOptionb(&intel
->optionCache
,
864 intel
->use_early_z
= driQueryOptionb(&intel
->optionCache
, "early_z");
866 intel
->prim
.primitive
= ~0;
868 /* Force all software fallbacks */
869 if (driQueryOptionb(&intel
->optionCache
, "no_rast")) {
870 fprintf(stderr
, "disabling 3D rasterization\n");
874 if (driQueryOptionb(&intel
->optionCache
, "always_flush_batch")) {
875 fprintf(stderr
, "flushing batchbuffer before/after each draw call\n");
876 intel
->always_flush_batch
= 1;
879 if (driQueryOptionb(&intel
->optionCache
, "always_flush_cache")) {
880 fprintf(stderr
, "flushing GPU caches before/after each draw call\n");
881 intel
->always_flush_cache
= 1;
888 intelDestroyContext(__DRIcontext
* driContextPriv
)
890 struct intel_context
*intel
=
891 (struct intel_context
*) driContextPriv
->driverPrivate
;
893 assert(intel
); /* should never be null */
895 INTEL_FIREVERTICES(intel
);
897 _mesa_meta_free(&intel
->ctx
);
899 intel
->vtbl
.destroy(intel
);
901 _swsetup_DestroyContext(&intel
->ctx
);
902 _tnl_DestroyContext(&intel
->ctx
);
903 _vbo_DestroyContext(&intel
->ctx
);
905 _swrast_DestroyContext(&intel
->ctx
);
906 intel
->Fallback
= 0x0; /* don't call _swrast_Flush later */
908 intel_batchbuffer_free(intel
);
910 free(intel
->prim
.vb
);
911 intel
->prim
.vb
= NULL
;
912 drm_intel_bo_unreference(intel
->prim
.vb_bo
);
913 intel
->prim
.vb_bo
= NULL
;
914 drm_intel_bo_unreference(intel
->first_post_swapbuffers_batch
);
915 intel
->first_post_swapbuffers_batch
= NULL
;
917 driDestroyOptionCache(&intel
->optionCache
);
919 /* free the Mesa context */
920 _mesa_free_context_data(&intel
->ctx
);
922 _math_matrix_dtr(&intel
->ViewportMatrix
);
925 driContextPriv
->driverPrivate
= NULL
;
930 intelUnbindContext(__DRIcontext
* driContextPriv
)
932 /* Unset current context and dispath table */
933 _mesa_make_current(NULL
, NULL
, NULL
);
939 intelMakeCurrent(__DRIcontext
* driContextPriv
,
940 __DRIdrawable
* driDrawPriv
,
941 __DRIdrawable
* driReadPriv
)
943 struct intel_context
*intel
;
944 GET_CURRENT_CONTEXT(curCtx
);
947 intel
= (struct intel_context
*) driContextPriv
->driverPrivate
;
951 /* According to the glXMakeCurrent() man page: "Pending commands to
952 * the previous context, if any, are flushed before it is released."
953 * But only flush if we're actually changing contexts.
955 if (intel_context(curCtx
) && intel_context(curCtx
) != intel
) {
959 if (driContextPriv
) {
960 struct gl_framebuffer
*fb
, *readFb
;
962 if (driDrawPriv
== NULL
&& driReadPriv
== NULL
) {
963 fb
= _mesa_get_incomplete_framebuffer();
964 readFb
= _mesa_get_incomplete_framebuffer();
966 fb
= driDrawPriv
->driverPrivate
;
967 readFb
= driReadPriv
->driverPrivate
;
968 driContextPriv
->dri2
.draw_stamp
= driDrawPriv
->dri2
.stamp
- 1;
969 driContextPriv
->dri2
.read_stamp
= driReadPriv
->dri2
.stamp
- 1;
972 intel_prepare_render(intel
);
973 _mesa_make_current(&intel
->ctx
, fb
, readFb
);
975 /* We do this in intel_prepare_render() too, but intel->ctx.DrawBuffer
976 * is NULL at that point. We can't call _mesa_makecurrent()
977 * first, since we need the buffer size for the initial
978 * viewport. So just call intel_draw_buffer() again here. */
979 intel_draw_buffer(&intel
->ctx
);
982 _mesa_make_current(NULL
, NULL
, NULL
);
989 * \brief Query DRI2 to obtain a DRIdrawable's buffers.
991 * To determine which DRI buffers to request, examine the renderbuffers
992 * attached to the drawable's framebuffer. Then request the buffers with
993 * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
995 * This is called from intel_update_renderbuffers(). It is used only if either
996 * the hardware or the X driver lacks separate stencil support.
998 * \param drawable Drawable whose buffers are queried.
999 * \param buffers [out] List of buffers returned by DRI2 query.
1000 * \param buffer_count [out] Number of buffers returned.
1002 * \see intel_update_renderbuffers()
1003 * \see DRI2GetBuffers()
1004 * \see DRI2GetBuffersWithFormat()
1007 intel_query_dri2_buffers_no_separate_stencil(struct intel_context
*intel
,
1008 __DRIdrawable
*drawable
,
1009 __DRIbuffer
**buffers
,
1012 assert(!intel
->must_use_separate_stencil
);
1014 __DRIscreen
*screen
= intel
->intelScreen
->driScrnPriv
;
1015 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1017 if (screen
->dri2
.loader
1018 && screen
->dri2
.loader
->base
.version
> 2
1019 && screen
->dri2
.loader
->getBuffersWithFormat
!= NULL
) {
1022 const int max_attachments
= 4;
1023 unsigned *attachments
= calloc(2 * max_attachments
, sizeof(unsigned));
1025 struct intel_renderbuffer
*front_rb
;
1026 struct intel_renderbuffer
*back_rb
;
1027 struct intel_renderbuffer
*depth_rb
;
1028 struct intel_renderbuffer
*stencil_rb
;
1030 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1031 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1032 depth_rb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
1033 stencil_rb
= intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
1035 if ((intel
->is_front_buffer_rendering
||
1036 intel
->is_front_buffer_reading
||
1037 !back_rb
) && front_rb
) {
1038 attachments
[i
++] = __DRI_BUFFER_FRONT_LEFT
;
1039 attachments
[i
++] = intel_bits_per_pixel(front_rb
);
1043 attachments
[i
++] = __DRI_BUFFER_BACK_LEFT
;
1044 attachments
[i
++] = intel_bits_per_pixel(back_rb
);
1047 if (depth_rb
&& stencil_rb
) {
1048 attachments
[i
++] = __DRI_BUFFER_DEPTH_STENCIL
;
1049 attachments
[i
++] = intel_bits_per_pixel(depth_rb
);
1050 } else if (depth_rb
) {
1051 attachments
[i
++] = __DRI_BUFFER_DEPTH
;
1052 attachments
[i
++] = intel_bits_per_pixel(depth_rb
);
1053 } else if (stencil_rb
) {
1054 attachments
[i
++] = __DRI_BUFFER_STENCIL
;
1055 attachments
[i
++] = intel_bits_per_pixel(stencil_rb
);
1058 assert(i
<= 2 * max_attachments
);
1060 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1065 drawable
->loaderPrivate
);
1068 } else if (screen
->dri2
.loader
) {
1071 const int max_attachments
= 4;
1072 unsigned *attachments
= calloc(max_attachments
, sizeof(unsigned));
1074 if (intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
))
1075 attachments
[i
++] = __DRI_BUFFER_FRONT_LEFT
;
1076 if (intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
))
1077 attachments
[i
++] = __DRI_BUFFER_BACK_LEFT
;
1078 if (intel_get_renderbuffer(fb
, BUFFER_DEPTH
))
1079 attachments
[i
++] = __DRI_BUFFER_DEPTH
;
1080 if (intel_get_renderbuffer(fb
, BUFFER_STENCIL
))
1081 attachments
[i
++] = __DRI_BUFFER_STENCIL
;
1083 assert(i
<= max_attachments
);
1085 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1090 drawable
->loaderPrivate
);
1100 * \brief Assign a DRI buffer's DRM region to a renderbuffer.
1102 * This is called from intel_update_renderbuffers(). It is used only if
1103 * either the hardware or the X driver lacks separate stencil support.
1106 * DRI buffers whose attachment point is DRI2BufferStencil or
1107 * DRI2BufferDepthStencil are handled as special cases.
1109 * \param buffer_name is a human readable name, such as "dri2 front buffer",
1110 * that is passed to intel_region_alloc_for_handle().
1112 * \see intel_update_renderbuffers()
1113 * \see intel_region_alloc_for_handle()
1116 intel_process_dri2_buffer_no_separate_stencil(struct intel_context
*intel
,
1117 __DRIdrawable
*drawable
,
1118 __DRIbuffer
*buffer
,
1119 struct intel_renderbuffer
*rb
,
1120 const char *buffer_name
)
1122 assert(!intel
->must_use_separate_stencil
);
1124 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1125 struct intel_renderbuffer
*depth_rb
= NULL
;
1130 if (rb
->region
&& rb
->region
->name
== buffer
->name
)
1133 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
)) {
1135 "attaching buffer %d, at %d, cpp %d, pitch %d\n",
1136 buffer
->name
, buffer
->attachment
,
1137 buffer
->cpp
, buffer
->pitch
);
1140 bool identify_depth_and_stencil
= false;
1141 if (buffer
->attachment
== __DRI_BUFFER_STENCIL
) {
1142 struct intel_renderbuffer
*depth_rb
=
1143 intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
1144 identify_depth_and_stencil
= depth_rb
&& depth_rb
->region
;
1147 if (identify_depth_and_stencil
) {
1148 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
)) {
1149 fprintf(stderr
, "(reusing depth buffer as stencil)\n");
1151 intel_region_reference(&rb
->region
, depth_rb
->region
);
1153 intel_region_release(&rb
->region
);
1154 rb
->region
= intel_region_alloc_for_handle(intel
->intelScreen
,
1158 buffer
->pitch
/ buffer
->cpp
,
1163 if (buffer
->attachment
== __DRI_BUFFER_DEPTH_STENCIL
) {
1164 struct intel_renderbuffer
*stencil_rb
=
1165 intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
1170 /* The rb passed in is the BUFFER_DEPTH attachment, and we need
1171 * to associate this region to BUFFER_STENCIL as well.
1173 intel_region_reference(&stencil_rb
->region
, rb
->region
);
1178 * \brief Query DRI2 to obtain a DRIdrawable's buffers.
1180 * To determine which DRI buffers to request, examine the renderbuffers
1181 * attached to the drawable's framebuffer. Then request the buffers with
1182 * DRI2GetBuffersWithFormat().
1184 * This is called from intel_update_renderbuffers(). It is used when 1) the
1185 * hardware supports separate stencil and 2) the X driver's separate stencil
1186 * support has been verified to work or is still unknown.
1188 * \param drawable Drawable whose buffers are queried.
1189 * \param buffers [out] List of buffers returned by DRI2 query.
1190 * \param buffer_count [out] Number of buffers returned.
1191 * \param attachments [out] List of pairs (attachment_point, bits_per_pixel)
1192 * that were submitted in the DRI2 query. Number of pairs
1193 * is same as buffer_count.
1195 * \see intel_update_renderbuffers()
1196 * \see DRI2GetBuffersWithFormat()
1197 * \see enum intel_dri2_has_hiz
1200 intel_query_dri2_buffers_with_separate_stencil(struct intel_context
*intel
,
1201 __DRIdrawable
*drawable
,
1202 __DRIbuffer
**buffers
,
1203 unsigned **attachments
,
1206 assert(intel
->has_separate_stencil
);
1208 __DRIscreen
*screen
= intel
->intelScreen
->driScrnPriv
;
1209 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1211 const int max_attachments
= 5;
1214 *attachments
= calloc(2 * max_attachments
, sizeof(unsigned));
1215 if (!*attachments
) {
1221 struct intel_renderbuffer
*front_rb
;
1222 struct intel_renderbuffer
*back_rb
;
1223 struct intel_renderbuffer
*depth_rb
;
1224 struct intel_renderbuffer
*stencil_rb
;
1226 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1227 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1228 depth_rb
= intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
1229 stencil_rb
= intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
1231 if ((intel
->is_front_buffer_rendering
||
1232 intel
->is_front_buffer_reading
||
1233 !back_rb
) && front_rb
) {
1234 (*attachments
)[i
++] = __DRI_BUFFER_FRONT_LEFT
;
1235 (*attachments
)[i
++] = intel_bits_per_pixel(front_rb
);
1239 (*attachments
)[i
++] = __DRI_BUFFER_BACK_LEFT
;
1240 (*attachments
)[i
++] = intel_bits_per_pixel(back_rb
);
1244 * We request a separate stencil buffer, and perhaps a hiz buffer too, even
1245 * if we do not yet know if the X driver supports it. See the comments for
1246 * 'enum intel_dri2_has_hiz'.
1250 (*attachments
)[i
++] = __DRI_BUFFER_DEPTH
;
1251 (*attachments
)[i
++] = intel_bits_per_pixel(depth_rb
);
1253 if (intel
->vtbl
.is_hiz_depth_format(intel
, depth_rb
->Base
.Format
)) {
1254 /* Depth and hiz buffer have same bpp. */
1255 (*attachments
)[i
++] = __DRI_BUFFER_HIZ
;
1256 (*attachments
)[i
++] = intel_bits_per_pixel(depth_rb
);
1261 assert(stencil_rb
->Base
.Format
== MESA_FORMAT_S8
);
1262 (*attachments
)[i
++] = __DRI_BUFFER_STENCIL
;
1263 (*attachments
)[i
++] = intel_bits_per_pixel(stencil_rb
);
1266 assert(i
<= 2 * max_attachments
);
1268 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1271 *attachments
, i
/ 2,
1273 drawable
->loaderPrivate
);
1277 *attachments
= NULL
;
1283 * \brief Assign a DRI buffer's DRM region to a renderbuffer.
1285 * This is called from intel_update_renderbuffers(). It is used when 1) the
1286 * hardware supports separate stencil and 2) the X driver's separate stencil
1287 * support has been verified to work or is still unknown.
1290 * DRI buffers whose attachment point is DRI2BufferStencil or DRI2BufferHiz
1291 * are handled as special cases.
1293 * \param buffer_name is a human readable name, such as "dri2 front buffer",
1294 * that is passed to intel_region_alloc_for_handle().
1296 * \see intel_update_renderbuffers()
1297 * \see intel_region_alloc_for_handle()
1298 * \see enum intel_dri2_has_hiz
1301 intel_process_dri2_buffer_with_separate_stencil(struct intel_context
*intel
,
1302 __DRIdrawable
*drawable
,
1303 __DRIbuffer
*buffer
,
1304 struct intel_renderbuffer
*rb
,
1305 const char *buffer_name
)
1307 assert(intel
->has_separate_stencil
);
1308 assert(buffer
->attachment
!= __DRI_BUFFER_DEPTH_STENCIL
);
1313 /* If the renderbuffer's and DRIbuffer's regions match, then continue. */
1314 if ((buffer
->attachment
!= __DRI_BUFFER_HIZ
&&
1316 rb
->region
->name
== buffer
->name
) ||
1317 (buffer
->attachment
== __DRI_BUFFER_HIZ
&&
1319 rb
->hiz_region
->name
== buffer
->name
)) {
1323 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
)) {
1325 "attaching buffer %d, at %d, cpp %d, pitch %d\n",
1326 buffer
->name
, buffer
->attachment
,
1327 buffer
->cpp
, buffer
->pitch
);
1331 * The stencil buffer has quirky pitch requirements. From Section
1332 * 2.11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
1333 * The pitch must be set to 2x the value computed based on width, as
1334 * the stencil buffer is stored with two rows interleaved.
1335 * If we neglect to double the pitch, then drm_intel_gem_bo_map_gtt()
1336 * maps the memory incorrectly.
1338 * To satisfy the pitch requirement, the X driver hackishly allocated
1339 * the gem buffer with bpp doubled and height halved. So buffer->cpp is
1340 * correct, but drawable->height is not.
1342 int buffer_height
= drawable
->h
;
1343 if (buffer
->attachment
== __DRI_BUFFER_STENCIL
) {
1347 struct intel_region
*region
=
1348 intel_region_alloc_for_handle(intel
->intelScreen
,
1352 buffer
->pitch
/ buffer
->cpp
,
1356 if (buffer
->attachment
== __DRI_BUFFER_HIZ
) {
1357 intel_region_reference(&rb
->hiz_region
, region
);
1359 intel_region_reference(&rb
->region
, region
);
1362 intel_region_release(®ion
);
1366 * \brief Verify that the X driver supports hiz and separate stencil.
1368 * This implements the cleanup stage of the handshake described in the
1369 * comments for 'enum intel_dri2_has_hiz'.
1371 * This should be called from intel_update_renderbuffers() after 1) the
1372 * DRIdrawable has been queried for its buffers via DRI2GetBuffersWithFormat()
1373 * and 2) the DRM region of each returned DRIbuffer has been assigned to the
1374 * appropriate intel_renderbuffer. Furthermore, this should be called *only*
1375 * when 1) intel_update_renderbuffers() tried to used the X driver's separate
1376 * stencil functionality and 2) it has not yet been determined if the X driver
1377 * supports separate stencil.
1379 * If we determine that the X driver does have support, then we set
1380 * intel_screen.dri2_has_hiz to true and return.
1382 * If we determine that the X driver lacks support, and we requested
1383 * a DRI2BufferDepth and DRI2BufferStencil, then we must remedy the mistake by
1384 * taking the following actions:
1385 * 1. Discard the framebuffer's stencil and depth renderbuffers.
1386 * 2. Create a combined depth/stencil renderbuffer and attach
1387 * it to the framebuffer's depth and stencil attachment points.
1388 * 3. Query the drawable for a new set of buffers, which consists of the
1389 * originally requested set plus DRI2BufferDepthStencil.
1390 * 4. Assign the DRI2BufferDepthStencil's DRM region to the new
1391 * depth/stencil renderbuffer.
1393 * \pre intel->intelScreen->dri2_has_hiz == INTEL_DRI2_HAS_HIZ_UNKNOWN
1395 * \param drawable Drawable whose buffers were queried.
1397 * \param buffers [in/out] As input, the buffer list returned by the
1398 * original DRI2 query. As output, the current buffer
1399 * list, which may have been altered by a new DRI2 query.
1401 * \param attachments [in/out] As input, the attachment list submitted
1402 * in the original DRI2 query. As output, the attachment
1403 * list that was submitted in the DRI2 query that
1404 * obtained the current buffer list, as returned in the
1405 * output parameter \c buffers. (Note: If no new query
1406 * was made, then the list remains unaltered).
1408 * \param count [out] Number of buffers in the current buffer list, as
1409 * returned in the output parameter \c buffers.
1411 * \see enum intel_dri2_has_hiz
1412 * \see struct intel_screen::dri2_has_hiz
1413 * \see intel_update_renderbuffers
1416 intel_verify_dri2_has_hiz(struct intel_context
*intel
,
1417 __DRIdrawable
*drawable
,
1418 __DRIbuffer
**buffers
,
1419 unsigned **attachments
,
1422 assert(intel
->intelScreen
->dri2_has_hiz
== INTEL_DRI2_HAS_HIZ_UNKNOWN
);
1424 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1425 struct intel_renderbuffer
*stencil_rb
=
1426 intel_get_renderbuffer(fb
, BUFFER_STENCIL
);
1430 * We requested a DRI2BufferStencil without knowing if the X driver
1431 * supports it. Now, check if X handled the request correctly and clean
1432 * up if it did not. (See comments for 'enum intel_dri2_has_hiz').
1434 struct intel_renderbuffer
*depth_rb
=
1435 intel_get_renderbuffer(fb
, BUFFER_DEPTH
);
1436 assert(stencil_rb
->Base
.Format
== MESA_FORMAT_S8
);
1437 assert(depth_rb
&& depth_rb
->Base
.Format
== MESA_FORMAT_X8_Z24
);
1439 if (stencil_rb
->region
->tiling
== I915_TILING_NONE
) {
1441 * The stencil buffer is actually W tiled. The region's tiling is
1442 * I915_TILING_NONE, however, because the GTT is incapable of W
1445 intel
->intelScreen
->dri2_has_hiz
= INTEL_DRI2_HAS_HIZ_TRUE
;
1449 * Oops... the screen doesn't support separate stencil. Discard the
1450 * separate depth and stencil buffers and replace them with
1451 * a combined depth/stencil buffer. Discard the hiz buffer too.
1453 intel
->intelScreen
->dri2_has_hiz
= INTEL_DRI2_HAS_HIZ_FALSE
;
1454 if (intel
->must_use_separate_stencil
) {
1455 _mesa_problem(&intel
->ctx
,
1456 "intel_context requires separate stencil, but the "
1457 "DRIscreen does not support it. You may need to "
1458 "upgrade the Intel X driver to 2.16.0");
1462 /* 1. Discard depth and stencil renderbuffers. */
1463 _mesa_remove_renderbuffer(fb
, BUFFER_DEPTH
);
1465 _mesa_remove_renderbuffer(fb
, BUFFER_STENCIL
);
1468 /* 2. Create new depth/stencil renderbuffer. */
1469 struct intel_renderbuffer
*depth_stencil_rb
=
1470 intel_create_renderbuffer(MESA_FORMAT_S8_Z24
);
1471 _mesa_add_renderbuffer(fb
, BUFFER_DEPTH
, &depth_stencil_rb
->Base
);
1472 _mesa_add_renderbuffer(fb
, BUFFER_STENCIL
, &depth_stencil_rb
->Base
);
1474 /* 3. Append DRI2BufferDepthStencil to attachment list. */
1475 int old_count
= *count
;
1476 unsigned int *old_attachments
= *attachments
;
1477 *count
= old_count
+ 1;
1478 *attachments
= malloc(2 * (*count
) * sizeof(unsigned));
1479 memcpy(*attachments
, old_attachments
, 2 * old_count
* sizeof(unsigned));
1480 free(old_attachments
);
1481 (*attachments
)[2 * old_count
+ 0] = __DRI_BUFFER_DEPTH_STENCIL
;
1482 (*attachments
)[2 * old_count
+ 1] = intel_bits_per_pixel(depth_stencil_rb
);
1484 /* 4. Request new set of DRI2 attachments. */
1485 __DRIscreen
*screen
= intel
->intelScreen
->driScrnPriv
;
1486 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1492 drawable
->loaderPrivate
);
1497 * I don't know how to recover from the failure assertion below.
1498 * Rather than fail gradually and unexpectedly, we should just die
1501 assert(*count
== old_count
+ 1);
1503 /* 5. Assign the DRI buffer's DRM region to the its renderbuffers. */
1504 __DRIbuffer
*depth_stencil_buffer
= NULL
;
1505 for (int i
= 0; i
< *count
; ++i
) {
1506 if ((*buffers
)[i
].attachment
== __DRI_BUFFER_DEPTH_STENCIL
) {
1507 depth_stencil_buffer
= &(*buffers
)[i
];
1511 struct intel_region
*region
=
1512 intel_region_alloc_for_handle(intel
->intelScreen
,
1513 depth_stencil_buffer
->cpp
,
1516 depth_stencil_buffer
->pitch
1517 / depth_stencil_buffer
->cpp
,
1518 depth_stencil_buffer
->name
,
1519 "dri2 depth / stencil buffer");
1520 intel_region_reference(&intel_get_renderbuffer(fb
, BUFFER_DEPTH
)->region
,
1522 intel_region_reference(&intel_get_renderbuffer(fb
, BUFFER_STENCIL
)->region
,
1524 intel_region_release(®ion
);
1528 if (intel_framebuffer_has_hiz(fb
)) {
1530 * In the future, the driver may advertise a GL config with hiz
1531 * compatible depth bits and 0 stencil bits (for example, when the
1532 * driver gains support for float32 depth buffers). When that day comes,
1533 * here we need to verify that the X driver does in fact support hiz and
1534 * clean up if it doesn't.
1536 * Presently, however, no verification or clean up is necessary, and
1537 * execution should not reach here. If the framebuffer still has a hiz
1538 * region, then we have already set dri2_has_hiz to true after
1539 * confirming above that the stencil buffer is W tiled.