2 Copyright 2003 VMware, Inc.
3 Copyright (C) Intel Corp. 2006. All Rights Reserved.
4 Intel funded Tungsten Graphics to
5 develop this 3D driver.
7 Permission is hereby granted, free of charge, to any person obtaining
8 a copy of this software and associated documentation files (the
9 "Software"), to deal in the Software without restriction, including
10 without limitation the rights to use, copy, modify, merge, publish,
11 distribute, sublicense, and/or sell copies of the Software, and to
12 permit persons to whom the Software is furnished to do so, subject to
13 the following conditions:
15 The above copyright notice and this permission notice (including the
16 next paragraph) shall be included in all copies or substantial
17 portions of the Software.
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **********************************************************************/
30 * Keith Whitwell <keithw@vmware.com>
34 #include "main/api_exec.h"
35 #include "main/context.h"
36 #include "main/fbobject.h"
37 #include "main/imports.h"
38 #include "main/macros.h"
39 #include "main/points.h"
40 #include "main/version.h"
41 #include "main/vtxfmt.h"
43 #include "vbo/vbo_context.h"
45 #include "drivers/common/driverfuncs.h"
46 #include "drivers/common/meta.h"
49 #include "brw_context.h"
50 #include "brw_defines.h"
52 #include "brw_state.h"
54 #include "intel_batchbuffer.h"
55 #include "intel_buffer_objects.h"
56 #include "intel_buffers.h"
57 #include "intel_fbo.h"
58 #include "intel_mipmap_tree.h"
59 #include "intel_pixel.h"
60 #include "intel_regions.h"
61 #include "intel_tex.h"
62 #include "intel_tex_obj.h"
64 #include "swrast_setup/swrast_setup.h"
66 #include "tnl/t_pipeline.h"
67 #include "glsl/ralloc.h"
69 /***************************************
70 * Mesa's Driver Functions
71 ***************************************/
74 brw_query_samples_for_format(struct gl_context
*ctx
, GLenum target
,
75 GLenum internalFormat
, int samples
[16])
77 struct brw_context
*brw
= brw_context(ctx
);
103 const char *const brw_vendor_string
= "Intel Open Source Technology Center";
106 brw_get_renderer_string(unsigned deviceID
)
109 static char buffer
[128];
113 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
114 #include "pci_ids/i965_pci_ids.h"
116 chipset
= "Unknown Intel Chipset";
120 (void) driGetRendererString(buffer
, chipset
, 0);
124 static const GLubyte
*
125 intelGetString(struct gl_context
* ctx
, GLenum name
)
127 const struct brw_context
*const brw
= brw_context(ctx
);
131 return (GLubyte
*) brw_vendor_string
;
135 (GLubyte
*) brw_get_renderer_string(brw
->intelScreen
->deviceID
);
143 intel_viewport(struct gl_context
*ctx
)
145 struct brw_context
*brw
= brw_context(ctx
);
146 __DRIcontext
*driContext
= brw
->driContext
;
148 if (_mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
149 dri2InvalidateDrawable(driContext
->driDrawablePriv
);
150 dri2InvalidateDrawable(driContext
->driReadablePriv
);
155 intelInvalidateState(struct gl_context
* ctx
, GLuint new_state
)
157 struct brw_context
*brw
= brw_context(ctx
);
159 if (ctx
->swrast_context
)
160 _swrast_InvalidateState(ctx
, new_state
);
161 _vbo_InvalidateState(ctx
, new_state
);
163 brw
->NewGLState
|= new_state
;
166 #define flushFront(screen) ((screen)->image.loader ? (screen)->image.loader->flushFrontBuffer : (screen)->dri2.loader->flushFrontBuffer)
169 intel_flush_front(struct gl_context
*ctx
)
171 struct brw_context
*brw
= brw_context(ctx
);
172 __DRIcontext
*driContext
= brw
->driContext
;
173 __DRIdrawable
*driDrawable
= driContext
->driDrawablePriv
;
174 __DRIscreen
*const screen
= brw
->intelScreen
->driScrnPriv
;
176 if (brw
->front_buffer_dirty
&& _mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
177 if (flushFront(screen
) && driDrawable
&&
178 driDrawable
->loaderPrivate
) {
180 /* Resolve before flushing FAKE_FRONT_LEFT to FRONT_LEFT.
182 * This potentially resolves both front and back buffer. It
183 * is unnecessary to resolve the back, but harms nothing except
184 * performance. And no one cares about front-buffer render
187 intel_resolve_for_dri2_flush(brw
, driDrawable
);
188 intel_batchbuffer_flush(brw
);
190 flushFront(screen
)(driDrawable
, driDrawable
->loaderPrivate
);
192 /* We set the dirty bit in intel_prepare_render() if we're
193 * front buffer rendering once we get there.
195 brw
->front_buffer_dirty
= false;
201 intel_glFlush(struct gl_context
*ctx
)
203 struct brw_context
*brw
= brw_context(ctx
);
205 intel_batchbuffer_flush(brw
);
206 intel_flush_front(ctx
);
207 if (brw_is_front_buffer_drawing(ctx
->DrawBuffer
))
208 brw
->need_throttle
= true;
212 intelFinish(struct gl_context
* ctx
)
214 struct brw_context
*brw
= brw_context(ctx
);
218 if (brw
->batch
.last_bo
)
219 drm_intel_bo_wait_rendering(brw
->batch
.last_bo
);
223 brw_init_driver_functions(struct brw_context
*brw
,
224 struct dd_function_table
*functions
)
226 _mesa_init_driver_functions(functions
);
228 /* GLX uses DRI2 invalidate events to handle window resizing.
229 * Unfortunately, EGL does not - libEGL is written in XCB (not Xlib),
230 * which doesn't provide a mechanism for snooping the event queues.
232 * So EGL still relies on viewport hacks to handle window resizing.
233 * This should go away with DRI3000.
235 if (!brw
->driContext
->driScreenPriv
->dri2
.useInvalidate
)
236 functions
->Viewport
= intel_viewport
;
238 functions
->Flush
= intel_glFlush
;
239 functions
->Finish
= intelFinish
;
240 functions
->GetString
= intelGetString
;
241 functions
->UpdateState
= intelInvalidateState
;
243 intelInitTextureFuncs(functions
);
244 intelInitTextureImageFuncs(functions
);
245 intelInitTextureSubImageFuncs(functions
);
246 intelInitTextureCopyImageFuncs(functions
);
247 intelInitClearFuncs(functions
);
248 intelInitBufferFuncs(functions
);
249 intelInitPixelFuncs(functions
);
250 intelInitBufferObjectFuncs(functions
);
251 intel_init_syncobj_functions(functions
);
252 brw_init_object_purgeable_functions(functions
);
254 brwInitFragProgFuncs( functions
);
255 brw_init_common_queryobj_functions(functions
);
257 gen6_init_queryobj_functions(functions
);
259 gen4_init_queryobj_functions(functions
);
261 functions
->QuerySamplesForFormat
= brw_query_samples_for_format
;
263 functions
->NewTransformFeedback
= brw_new_transform_feedback
;
264 functions
->DeleteTransformFeedback
= brw_delete_transform_feedback
;
265 functions
->GetTransformFeedbackVertexCount
=
266 brw_get_transform_feedback_vertex_count
;
268 functions
->BeginTransformFeedback
= gen7_begin_transform_feedback
;
269 functions
->EndTransformFeedback
= gen7_end_transform_feedback
;
270 functions
->PauseTransformFeedback
= gen7_pause_transform_feedback
;
271 functions
->ResumeTransformFeedback
= gen7_resume_transform_feedback
;
273 functions
->BeginTransformFeedback
= brw_begin_transform_feedback
;
274 functions
->EndTransformFeedback
= brw_end_transform_feedback
;
278 functions
->GetSamplePosition
= gen6_get_sample_position
;
282 brw_initialize_context_constants(struct brw_context
*brw
)
284 struct gl_context
*ctx
= &brw
->ctx
;
286 unsigned max_samplers
=
287 brw
->gen
>= 8 || brw
->is_haswell
? BRW_MAX_TEX_UNIT
: 16;
289 ctx
->Const
.QueryCounterBits
.Timestamp
= 36;
291 ctx
->Const
.StripTextureBorder
= true;
293 ctx
->Const
.MaxDualSourceDrawBuffers
= 1;
294 ctx
->Const
.MaxDrawBuffers
= BRW_MAX_DRAW_BUFFERS
;
295 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= max_samplers
;
296 ctx
->Const
.MaxTextureCoordUnits
= 8; /* Mesa limit */
297 ctx
->Const
.MaxTextureUnits
=
298 MIN2(ctx
->Const
.MaxTextureCoordUnits
,
299 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
300 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= max_samplers
;
302 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= max_samplers
;
304 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= 0;
305 if (getenv("INTEL_COMPUTE_SHADER")) {
306 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
= BRW_MAX_TEX_UNIT
;
307 ctx
->Const
.MaxUniformBufferBindings
+= 12;
309 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
= 0;
311 ctx
->Const
.MaxCombinedTextureImageUnits
=
312 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
+
313 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
+
314 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
+
315 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
;
317 ctx
->Const
.MaxTextureLevels
= 14; /* 8192 */
318 if (ctx
->Const
.MaxTextureLevels
> MAX_TEXTURE_LEVELS
)
319 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
320 ctx
->Const
.Max3DTextureLevels
= 12; /* 2048 */
321 ctx
->Const
.MaxCubeTextureLevels
= 14; /* 8192 */
322 ctx
->Const
.MaxTextureMbytes
= 1536;
325 ctx
->Const
.MaxArrayTextureLayers
= 2048;
327 ctx
->Const
.MaxArrayTextureLayers
= 512;
329 ctx
->Const
.MaxTextureRectSize
= 1 << 12;
331 ctx
->Const
.MaxTextureMaxAnisotropy
= 16.0;
333 ctx
->Const
.MaxRenderbufferSize
= 8192;
335 /* Hardware only supports a limited number of transform feedback buffers.
336 * So we need to override the Mesa default (which is based only on software
339 ctx
->Const
.MaxTransformFeedbackBuffers
= BRW_MAX_SOL_BUFFERS
;
341 /* On Gen6, in the worst case, we use up one binding table entry per
342 * transform feedback component (see comments above the definition of
343 * BRW_MAX_SOL_BINDINGS, in brw_context.h), so we need to advertise a value
344 * for MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS equal to
345 * BRW_MAX_SOL_BINDINGS.
347 * In "separate components" mode, we need to divide this value by
348 * BRW_MAX_SOL_BUFFERS, so that the total number of binding table entries
349 * used up by all buffers will not exceed BRW_MAX_SOL_BINDINGS.
351 ctx
->Const
.MaxTransformFeedbackInterleavedComponents
= BRW_MAX_SOL_BINDINGS
;
352 ctx
->Const
.MaxTransformFeedbackSeparateComponents
=
353 BRW_MAX_SOL_BINDINGS
/ BRW_MAX_SOL_BUFFERS
;
355 ctx
->Const
.AlwaysUseGetTransformFeedbackVertexCount
= true;
358 const int *msaa_modes
= intel_supported_msaa_modes(brw
->intelScreen
);
359 const int clamp_max_samples
=
360 driQueryOptioni(&brw
->optionCache
, "clamp_max_samples");
362 if (clamp_max_samples
< 0) {
363 max_samples
= msaa_modes
[0];
365 /* Select the largest supported MSAA mode that does not exceed
369 for (int i
= 0; msaa_modes
[i
] != 0; ++i
) {
370 if (msaa_modes
[i
] <= clamp_max_samples
) {
371 max_samples
= msaa_modes
[i
];
377 ctx
->Const
.MaxSamples
= max_samples
;
378 ctx
->Const
.MaxColorTextureSamples
= max_samples
;
379 ctx
->Const
.MaxDepthTextureSamples
= max_samples
;
380 ctx
->Const
.MaxIntegerSamples
= max_samples
;
383 ctx
->Const
.MaxProgramTextureGatherComponents
= 4;
384 else if (brw
->gen
== 6)
385 ctx
->Const
.MaxProgramTextureGatherComponents
= 1;
387 ctx
->Const
.MinLineWidth
= 1.0;
388 ctx
->Const
.MinLineWidthAA
= 1.0;
389 ctx
->Const
.MaxLineWidth
= 5.0;
390 ctx
->Const
.MaxLineWidthAA
= 5.0;
391 ctx
->Const
.LineWidthGranularity
= 0.5;
393 ctx
->Const
.MinPointSize
= 1.0;
394 ctx
->Const
.MinPointSizeAA
= 1.0;
395 ctx
->Const
.MaxPointSize
= 255.0;
396 ctx
->Const
.MaxPointSizeAA
= 255.0;
397 ctx
->Const
.PointSizeGranularity
= 1.0;
399 if (brw
->gen
>= 5 || brw
->is_g4x
)
400 ctx
->Const
.MaxClipPlanes
= 8;
402 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeInstructions
= 16 * 1024;
403 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAluInstructions
= 0;
404 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTexInstructions
= 0;
405 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTexIndirections
= 0;
406 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAluInstructions
= 0;
407 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTexInstructions
= 0;
408 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTexIndirections
= 0;
409 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAttribs
= 16;
410 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTemps
= 256;
411 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAddressRegs
= 1;
412 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeParameters
= 1024;
413 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxEnvParams
=
414 MIN2(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeParameters
,
415 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxEnvParams
);
417 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeInstructions
= 1024;
418 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAluInstructions
= 1024;
419 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTexInstructions
= 1024;
420 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTexIndirections
= 1024;
421 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAttribs
= 12;
422 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTemps
= 256;
423 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAddressRegs
= 0;
424 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeParameters
= 1024;
425 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxEnvParams
=
426 MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeParameters
,
427 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxEnvParams
);
429 /* Fragment shaders use real, 32-bit twos-complement integers for all
432 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.RangeMin
= 31;
433 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.RangeMax
= 30;
434 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.Precision
= 0;
435 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].HighInt
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
;
436 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MediumInt
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
;
439 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
440 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
441 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
442 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
443 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
= BRW_MAX_ABO
;
444 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
= BRW_MAX_ABO
;
445 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
= BRW_MAX_ABO
;
446 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicBuffers
= BRW_MAX_ABO
;
447 ctx
->Const
.MaxCombinedAtomicBuffers
= 3 * BRW_MAX_ABO
;
450 /* Gen6 converts quads to polygon in beginning of 3D pipeline,
451 * but we're not sure how it's actually done for vertex order,
452 * that affect provoking vertex decision. Always use last vertex
453 * convention for quad primitive which works as expected for now.
456 ctx
->Const
.QuadsFollowProvokingVertexConvention
= false;
458 ctx
->Const
.NativeIntegers
= true;
459 ctx
->Const
.UniformBooleanTrue
= 1;
461 /* From the gen4 PRM, volume 4 page 127:
463 * "For SURFTYPE_BUFFER non-rendertarget surfaces, this field specifies
464 * the base address of the first element of the surface, computed in
465 * software by adding the surface base address to the byte offset of
466 * the element in the buffer."
468 * However, unaligned accesses are slower, so enforce buffer alignment.
470 ctx
->Const
.UniformBufferOffsetAlignment
= 16;
471 ctx
->Const
.TextureBufferOffsetAlignment
= 16;
474 ctx
->Const
.MaxVarying
= 32;
475 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
= 128;
476 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
= 64;
477 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
= 128;
478 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
= 128;
481 /* We want the GLSL compiler to emit code that uses condition codes */
482 for (int i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
483 ctx
->ShaderCompilerOptions
[i
].MaxIfDepth
= brw
->gen
< 6 ? 16 : UINT_MAX
;
484 ctx
->ShaderCompilerOptions
[i
].EmitCondCodes
= true;
485 ctx
->ShaderCompilerOptions
[i
].EmitNoNoise
= true;
486 ctx
->ShaderCompilerOptions
[i
].EmitNoMainReturn
= true;
487 ctx
->ShaderCompilerOptions
[i
].EmitNoIndirectInput
= true;
488 ctx
->ShaderCompilerOptions
[i
].EmitNoIndirectOutput
=
489 (i
== MESA_SHADER_FRAGMENT
);
490 ctx
->ShaderCompilerOptions
[i
].EmitNoIndirectTemp
=
491 (i
== MESA_SHADER_FRAGMENT
);
492 ctx
->ShaderCompilerOptions
[i
].EmitNoIndirectUniform
= false;
493 ctx
->ShaderCompilerOptions
[i
].LowerClipDistance
= true;
496 ctx
->ShaderCompilerOptions
[MESA_SHADER_VERTEX
].OptimizeForAOS
= true;
497 ctx
->ShaderCompilerOptions
[MESA_SHADER_GEOMETRY
].OptimizeForAOS
= true;
499 /* ARB_viewport_array */
500 if (brw
->gen
>= 7 && ctx
->API
== API_OPENGL_CORE
) {
501 ctx
->Const
.MaxViewports
= GEN7_NUM_VIEWPORTS
;
502 ctx
->Const
.ViewportSubpixelBits
= 0;
504 /* Cast to float before negating becuase MaxViewportWidth is unsigned.
506 ctx
->Const
.ViewportBounds
.Min
= -(float)ctx
->Const
.MaxViewportWidth
;
507 ctx
->Const
.ViewportBounds
.Max
= ctx
->Const
.MaxViewportWidth
;
512 * Process driconf (drirc) options, setting appropriate context flags.
514 * intelInitExtensions still pokes at optionCache directly, in order to
515 * avoid advertising various extensions. No flags are set, so it makes
516 * sense to continue doing that there.
519 brw_process_driconf_options(struct brw_context
*brw
)
521 struct gl_context
*ctx
= &brw
->ctx
;
523 driOptionCache
*options
= &brw
->optionCache
;
524 driParseConfigFiles(options
, &brw
->intelScreen
->optionCache
,
525 brw
->driContext
->driScreenPriv
->myNum
, "i965");
527 int bo_reuse_mode
= driQueryOptioni(options
, "bo_reuse");
528 switch (bo_reuse_mode
) {
529 case DRI_CONF_BO_REUSE_DISABLED
:
531 case DRI_CONF_BO_REUSE_ALL
:
532 intel_bufmgr_gem_enable_reuse(brw
->bufmgr
);
536 if (!driQueryOptionb(options
, "hiz")) {
537 brw
->has_hiz
= false;
538 /* On gen6, you can only do separate stencil with HIZ. */
540 brw
->has_separate_stencil
= false;
543 if (driQueryOptionb(options
, "always_flush_batch")) {
544 fprintf(stderr
, "flushing batchbuffer before/after each draw call\n");
545 brw
->always_flush_batch
= true;
548 if (driQueryOptionb(options
, "always_flush_cache")) {
549 fprintf(stderr
, "flushing GPU caches before/after each draw call\n");
550 brw
->always_flush_cache
= true;
553 if (driQueryOptionb(options
, "disable_throttling")) {
554 fprintf(stderr
, "disabling flush throttling\n");
555 brw
->disable_throttling
= true;
558 brw
->disable_derivative_optimization
=
559 driQueryOptionb(&brw
->optionCache
, "disable_derivative_optimization");
561 brw
->precompile
= driQueryOptionb(&brw
->optionCache
, "shader_precompile");
563 ctx
->Const
.ForceGLSLExtensionsWarn
=
564 driQueryOptionb(options
, "force_glsl_extensions_warn");
566 ctx
->Const
.DisableGLSLLineContinuations
=
567 driQueryOptionb(options
, "disable_glsl_line_continuations");
571 brwCreateContext(gl_api api
,
572 const struct gl_config
*mesaVis
,
573 __DRIcontext
*driContextPriv
,
574 unsigned major_version
,
575 unsigned minor_version
,
578 unsigned *dri_ctx_error
,
579 void *sharedContextPrivate
)
581 __DRIscreen
*sPriv
= driContextPriv
->driScreenPriv
;
582 struct gl_context
*shareCtx
= (struct gl_context
*) sharedContextPrivate
;
583 struct intel_screen
*screen
= sPriv
->driverPrivate
;
584 const struct brw_device_info
*devinfo
= screen
->devinfo
;
585 struct dd_function_table functions
;
587 /* Only allow the __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS flag if the kernel
588 * provides us with context reset notifications.
590 uint32_t allowed_flags
= __DRI_CTX_FLAG_DEBUG
591 | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
;
593 if (screen
->has_context_reset_notification
)
594 allowed_flags
|= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
;
596 if (flags
& ~allowed_flags
) {
597 *dri_ctx_error
= __DRI_CTX_ERROR_UNKNOWN_FLAG
;
601 struct brw_context
*brw
= rzalloc(NULL
, struct brw_context
);
603 fprintf(stderr
, "%s: failed to alloc context\n", __FUNCTION__
);
604 *dri_ctx_error
= __DRI_CTX_ERROR_NO_MEMORY
;
608 driContextPriv
->driverPrivate
= brw
;
609 brw
->driContext
= driContextPriv
;
610 brw
->intelScreen
= screen
;
611 brw
->bufmgr
= screen
->bufmgr
;
613 brw
->gen
= devinfo
->gen
;
614 brw
->gt
= devinfo
->gt
;
615 brw
->is_g4x
= devinfo
->is_g4x
;
616 brw
->is_baytrail
= devinfo
->is_baytrail
;
617 brw
->is_haswell
= devinfo
->is_haswell
;
618 brw
->has_llc
= devinfo
->has_llc
;
619 brw
->has_hiz
= devinfo
->has_hiz_and_separate_stencil
;
620 brw
->has_separate_stencil
= devinfo
->has_hiz_and_separate_stencil
;
621 brw
->has_pln
= devinfo
->has_pln
;
622 brw
->has_compr4
= devinfo
->has_compr4
;
623 brw
->has_surface_tile_offset
= devinfo
->has_surface_tile_offset
;
624 brw
->has_negative_rhw_bug
= devinfo
->has_negative_rhw_bug
;
625 brw
->needs_unlit_centroid_workaround
=
626 devinfo
->needs_unlit_centroid_workaround
;
628 brw
->must_use_separate_stencil
= screen
->hw_must_use_separate_stencil
;
629 brw
->has_swizzling
= screen
->hw_has_swizzling
;
632 gen8_init_vtable_surface_functions(brw
);
633 gen7_init_vtable_sampler_functions(brw
);
634 brw
->vtbl
.emit_depth_stencil_hiz
= gen8_emit_depth_stencil_hiz
;
635 } else if (brw
->gen
>= 7) {
636 gen7_init_vtable_surface_functions(brw
);
637 gen7_init_vtable_sampler_functions(brw
);
638 brw
->vtbl
.emit_depth_stencil_hiz
= gen7_emit_depth_stencil_hiz
;
640 gen4_init_vtable_surface_functions(brw
);
641 gen4_init_vtable_sampler_functions(brw
);
642 brw
->vtbl
.emit_depth_stencil_hiz
= brw_emit_depth_stencil_hiz
;
645 brw_init_driver_functions(brw
, &functions
);
648 functions
.GetGraphicsResetStatus
= brw_get_graphics_reset_status
;
650 struct gl_context
*ctx
= &brw
->ctx
;
652 if (!_mesa_initialize_context(ctx
, api
, mesaVis
, shareCtx
, &functions
)) {
653 *dri_ctx_error
= __DRI_CTX_ERROR_NO_MEMORY
;
654 fprintf(stderr
, "%s: failed to init mesa context\n", __FUNCTION__
);
655 intelDestroyContext(driContextPriv
);
659 driContextSetFlags(ctx
, flags
);
661 /* Initialize the software rasterizer and helper modules.
663 * As of GL 3.1 core, the gen4+ driver doesn't need the swrast context for
664 * software fallbacks (which we have to support on legacy GL to do weird
665 * glDrawPixels(), glBitmap(), and other functions).
667 if (api
!= API_OPENGL_CORE
&& api
!= API_OPENGLES2
) {
668 _swrast_CreateContext(ctx
);
671 _vbo_CreateContext(ctx
);
672 if (ctx
->swrast_context
) {
673 _tnl_CreateContext(ctx
);
674 TNL_CONTEXT(ctx
)->Driver
.RunPipeline
= _tnl_run_pipeline
;
675 _swsetup_CreateContext(ctx
);
677 /* Configure swrast to match hardware characteristics: */
678 _swrast_allow_pixel_fog(ctx
, false);
679 _swrast_allow_vertex_fog(ctx
, true);
682 _mesa_meta_init(ctx
);
684 brw_process_driconf_options(brw
);
685 brw_process_intel_debug_variable(brw
);
686 brw_initialize_context_constants(brw
);
688 ctx
->Const
.ResetStrategy
= notify_reset
689 ? GL_LOSE_CONTEXT_ON_RESET_ARB
: GL_NO_RESET_NOTIFICATION_ARB
;
691 /* Reinitialize the context point state. It depends on ctx->Const values. */
692 _mesa_init_point(ctx
);
696 intel_batchbuffer_init(brw
);
699 /* Create a new hardware context. Using a hardware context means that
700 * our GPU state will be saved/restored on context switch, allowing us
701 * to assume that the GPU is in the same state we left it in.
703 * This is required for transform feedback buffer offsets, query objects,
704 * and also allows us to reduce how much state we have to emit.
706 brw
->hw_ctx
= drm_intel_gem_context_create(brw
->bufmgr
);
709 fprintf(stderr
, "Gen6+ requires Kernel 3.6 or later.\n");
710 intelDestroyContext(driContextPriv
);
717 intelInitExtensions(ctx
);
719 brw_init_surface_formats(brw
);
721 brw
->max_vs_threads
= devinfo
->max_vs_threads
;
722 brw
->max_gs_threads
= devinfo
->max_gs_threads
;
723 brw
->max_wm_threads
= devinfo
->max_wm_threads
;
724 brw
->urb
.size
= devinfo
->urb
.size
;
725 brw
->urb
.min_vs_entries
= devinfo
->urb
.min_vs_entries
;
726 brw
->urb
.max_vs_entries
= devinfo
->urb
.max_vs_entries
;
727 brw
->urb
.max_gs_entries
= devinfo
->urb
.max_gs_entries
;
729 /* Estimate the size of the mappable aperture into the GTT. There's an
730 * ioctl to get the whole GTT size, but not one to get the mappable subset.
731 * It turns out it's basically always 256MB, though some ancient hardware
734 uint32_t gtt_size
= 256 * 1024 * 1024;
736 /* We don't want to map two objects such that a memcpy between them would
737 * just fault one mapping in and then the other over and over forever. So
738 * we would need to divide the GTT size by 2. Additionally, some GTT is
739 * taken up by things like the framebuffer and the ringbuffer and such, so
740 * be more conservative.
742 brw
->max_gtt_map_object_size
= gtt_size
/ 4;
745 brw
->urb
.gen6_gs_previously_active
= false;
747 brw
->prim_restart
.in_progress
= false;
748 brw
->prim_restart
.enable_cut_index
= false;
749 brw
->gs
.enabled
= false;
752 brw
->curbe
.last_buf
= calloc(1, 4096);
753 brw
->curbe
.next_buf
= calloc(1, 4096);
756 ctx
->VertexProgram
._MaintainTnlProgram
= true;
757 ctx
->FragmentProgram
._MaintainTexEnvProgram
= true;
759 brw_draw_init( brw
);
761 if ((flags
& __DRI_CTX_FLAG_DEBUG
) != 0) {
762 /* Turn on some extra GL_ARB_debug_output generation. */
763 brw
->perf_debug
= true;
766 if ((flags
& __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
) != 0)
767 ctx
->Const
.ContextFlags
|= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB
;
769 if (INTEL_DEBUG
& DEBUG_SHADER_TIME
)
770 brw_init_shader_time(brw
);
772 _mesa_compute_version(ctx
);
774 _mesa_initialize_dispatch_tables(ctx
);
775 _mesa_initialize_vbo_vtxfmt(ctx
);
777 if (ctx
->Extensions
.AMD_performance_monitor
) {
778 brw_init_performance_monitors(brw
);
785 intelDestroyContext(__DRIcontext
* driContextPriv
)
787 struct brw_context
*brw
=
788 (struct brw_context
*) driContextPriv
->driverPrivate
;
789 struct gl_context
*ctx
= &brw
->ctx
;
791 assert(brw
); /* should never be null */
795 /* Dump a final BMP in case the application doesn't call SwapBuffers */
796 if (INTEL_DEBUG
& DEBUG_AUB
) {
797 intel_batchbuffer_flush(brw
);
798 aub_dump_bmp(&brw
->ctx
);
801 _mesa_meta_free(&brw
->ctx
);
803 if (INTEL_DEBUG
& DEBUG_SHADER_TIME
) {
804 /* Force a report. */
805 brw
->shader_time
.report_time
= 0;
807 brw_collect_and_report_shader_time(brw
);
808 brw_destroy_shader_time(brw
);
811 brw_destroy_state(brw
);
812 brw_draw_destroy(brw
);
814 drm_intel_bo_unreference(brw
->curbe
.curbe_bo
);
816 free(brw
->curbe
.last_buf
);
817 free(brw
->curbe
.next_buf
);
819 drm_intel_gem_context_destroy(brw
->hw_ctx
);
821 if (ctx
->swrast_context
) {
822 _swsetup_DestroyContext(&brw
->ctx
);
823 _tnl_DestroyContext(&brw
->ctx
);
825 _vbo_DestroyContext(&brw
->ctx
);
827 if (ctx
->swrast_context
)
828 _swrast_DestroyContext(&brw
->ctx
);
830 intel_batchbuffer_free(brw
);
832 drm_intel_bo_unreference(brw
->first_post_swapbuffers_batch
);
833 brw
->first_post_swapbuffers_batch
= NULL
;
835 driDestroyOptionCache(&brw
->optionCache
);
837 /* free the Mesa context */
838 _mesa_free_context_data(&brw
->ctx
);
841 driContextPriv
->driverPrivate
= NULL
;
845 intelUnbindContext(__DRIcontext
* driContextPriv
)
847 /* Unset current context and dispath table */
848 _mesa_make_current(NULL
, NULL
, NULL
);
854 * Fixes up the context for GLES23 with our default-to-sRGB-capable behavior
855 * on window system framebuffers.
857 * Desktop GL is fairly reasonable in its handling of sRGB: You can ask if
858 * your renderbuffer can do sRGB encode, and you can flip a switch that does
859 * sRGB encode if the renderbuffer can handle it. You can ask specifically
860 * for a visual where you're guaranteed to be capable, but it turns out that
861 * everyone just makes all their ARGB8888 visuals capable and doesn't offer
862 * incapable ones, becuase there's no difference between the two in resources
863 * used. Applications thus get built that accidentally rely on the default
864 * visual choice being sRGB, so we make ours sRGB capable. Everything sounds
867 * But for GLES2/3, they decided that it was silly to not turn on sRGB encode
868 * for sRGB renderbuffers you made with the GL_EXT_texture_sRGB equivalent.
869 * So they removed the enable knob and made it "if the renderbuffer is sRGB
870 * capable, do sRGB encode". Then, for your window system renderbuffers, you
871 * can ask for sRGB visuals and get sRGB encode, or not ask for sRGB visuals
872 * and get no sRGB encode (assuming that both kinds of visual are available).
873 * Thus our choice to support sRGB by default on our visuals for desktop would
874 * result in broken rendering of GLES apps that aren't expecting sRGB encode.
876 * Unfortunately, renderbuffer setup happens before a context is created. So
877 * in intel_screen.c we always set up sRGB, and here, if you're a GLES2/3
878 * context (without an sRGB visual, though we don't have sRGB visuals exposed
879 * yet), we go turn that back off before anyone finds out.
882 intel_gles3_srgb_workaround(struct brw_context
*brw
,
883 struct gl_framebuffer
*fb
)
885 struct gl_context
*ctx
= &brw
->ctx
;
887 if (_mesa_is_desktop_gl(ctx
) || !fb
->Visual
.sRGBCapable
)
890 /* Some day when we support the sRGB capable bit on visuals available for
891 * GLES, we'll need to respect that and not disable things here.
893 fb
->Visual
.sRGBCapable
= false;
894 for (int i
= 0; i
< BUFFER_COUNT
; i
++) {
895 if (fb
->Attachment
[i
].Renderbuffer
&&
896 fb
->Attachment
[i
].Renderbuffer
->Format
== MESA_FORMAT_B8G8R8A8_SRGB
) {
897 fb
->Attachment
[i
].Renderbuffer
->Format
= MESA_FORMAT_B8G8R8A8_UNORM
;
903 intelMakeCurrent(__DRIcontext
* driContextPriv
,
904 __DRIdrawable
* driDrawPriv
,
905 __DRIdrawable
* driReadPriv
)
907 struct brw_context
*brw
;
908 GET_CURRENT_CONTEXT(curCtx
);
911 brw
= (struct brw_context
*) driContextPriv
->driverPrivate
;
915 /* According to the glXMakeCurrent() man page: "Pending commands to
916 * the previous context, if any, are flushed before it is released."
917 * But only flush if we're actually changing contexts.
919 if (brw_context(curCtx
) && brw_context(curCtx
) != brw
) {
923 if (driContextPriv
) {
924 struct gl_context
*ctx
= &brw
->ctx
;
925 struct gl_framebuffer
*fb
, *readFb
;
927 if (driDrawPriv
== NULL
&& driReadPriv
== NULL
) {
928 fb
= _mesa_get_incomplete_framebuffer();
929 readFb
= _mesa_get_incomplete_framebuffer();
931 fb
= driDrawPriv
->driverPrivate
;
932 readFb
= driReadPriv
->driverPrivate
;
933 driContextPriv
->dri2
.draw_stamp
= driDrawPriv
->dri2
.stamp
- 1;
934 driContextPriv
->dri2
.read_stamp
= driReadPriv
->dri2
.stamp
- 1;
937 /* The sRGB workaround changes the renderbuffer's format. We must change
938 * the format before the renderbuffer's miptree get's allocated, otherwise
939 * the formats of the renderbuffer and its miptree will differ.
941 intel_gles3_srgb_workaround(brw
, fb
);
942 intel_gles3_srgb_workaround(brw
, readFb
);
944 /* If the context viewport hasn't been initialized, force a call out to
945 * the loader to get buffers so we have a drawable size for the initial
947 if (!brw
->ctx
.ViewportInitialized
)
948 intel_prepare_render(brw
);
950 _mesa_make_current(ctx
, fb
, readFb
);
952 _mesa_make_current(NULL
, NULL
, NULL
);
959 intel_resolve_for_dri2_flush(struct brw_context
*brw
,
960 __DRIdrawable
*drawable
)
963 /* MSAA and fast color clear are not supported, so don't waste time
964 * checking whether a resolve is needed.
969 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
970 struct intel_renderbuffer
*rb
;
972 /* Usually, only the back buffer will need to be downsampled. However,
973 * the front buffer will also need it if the user has rendered into it.
975 static const gl_buffer_index buffers
[2] = {
980 for (int i
= 0; i
< 2; ++i
) {
981 rb
= intel_get_renderbuffer(fb
, buffers
[i
]);
982 if (rb
== NULL
|| rb
->mt
== NULL
)
984 if (rb
->mt
->num_samples
<= 1)
985 intel_miptree_resolve_color(brw
, rb
->mt
);
987 intel_renderbuffer_downsample(brw
, rb
);
992 intel_bits_per_pixel(const struct intel_renderbuffer
*rb
)
994 return _mesa_get_format_bytes(intel_rb_format(rb
)) * 8;
998 intel_query_dri2_buffers(struct brw_context
*brw
,
999 __DRIdrawable
*drawable
,
1000 __DRIbuffer
**buffers
,
1004 intel_process_dri2_buffer(struct brw_context
*brw
,
1005 __DRIdrawable
*drawable
,
1006 __DRIbuffer
*buffer
,
1007 struct intel_renderbuffer
*rb
,
1008 const char *buffer_name
);
1011 intel_update_image_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
);
1014 intel_update_dri2_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
)
1016 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1017 struct intel_renderbuffer
*rb
;
1018 __DRIbuffer
*buffers
= NULL
;
1020 const char *region_name
;
1022 /* Set this up front, so that in case our buffers get invalidated
1023 * while we're getting new buffers, we don't clobber the stamp and
1024 * thus ignore the invalidate. */
1025 drawable
->lastStamp
= drawable
->dri2
.stamp
;
1027 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
))
1028 fprintf(stderr
, "enter %s, drawable %p\n", __func__
, drawable
);
1030 intel_query_dri2_buffers(brw
, drawable
, &buffers
, &count
);
1032 if (buffers
== NULL
)
1035 for (i
= 0; i
< count
; i
++) {
1036 switch (buffers
[i
].attachment
) {
1037 case __DRI_BUFFER_FRONT_LEFT
:
1038 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1039 region_name
= "dri2 front buffer";
1042 case __DRI_BUFFER_FAKE_FRONT_LEFT
:
1043 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1044 region_name
= "dri2 fake front buffer";
1047 case __DRI_BUFFER_BACK_LEFT
:
1048 rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1049 region_name
= "dri2 back buffer";
1052 case __DRI_BUFFER_DEPTH
:
1053 case __DRI_BUFFER_HIZ
:
1054 case __DRI_BUFFER_DEPTH_STENCIL
:
1055 case __DRI_BUFFER_STENCIL
:
1056 case __DRI_BUFFER_ACCUM
:
1059 "unhandled buffer attach event, attachment type %d\n",
1060 buffers
[i
].attachment
);
1064 intel_process_dri2_buffer(brw
, drawable
, &buffers
[i
], rb
, region_name
);
1070 intel_update_renderbuffers(__DRIcontext
*context
, __DRIdrawable
*drawable
)
1072 struct brw_context
*brw
= context
->driverPrivate
;
1073 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1075 /* Set this up front, so that in case our buffers get invalidated
1076 * while we're getting new buffers, we don't clobber the stamp and
1077 * thus ignore the invalidate. */
1078 drawable
->lastStamp
= drawable
->dri2
.stamp
;
1080 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
))
1081 fprintf(stderr
, "enter %s, drawable %p\n", __func__
, drawable
);
1083 if (screen
->image
.loader
)
1084 intel_update_image_buffers(brw
, drawable
);
1086 intel_update_dri2_buffers(brw
, drawable
);
1088 driUpdateFramebufferSize(&brw
->ctx
, drawable
);
1092 * intel_prepare_render should be called anywhere that curent read/drawbuffer
1093 * state is required.
1096 intel_prepare_render(struct brw_context
*brw
)
1098 struct gl_context
*ctx
= &brw
->ctx
;
1099 __DRIcontext
*driContext
= brw
->driContext
;
1100 __DRIdrawable
*drawable
;
1102 drawable
= driContext
->driDrawablePriv
;
1103 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.draw_stamp
) {
1104 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
1105 intel_update_renderbuffers(driContext
, drawable
);
1106 driContext
->dri2
.draw_stamp
= drawable
->dri2
.stamp
;
1109 drawable
= driContext
->driReadablePriv
;
1110 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.read_stamp
) {
1111 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
1112 intel_update_renderbuffers(driContext
, drawable
);
1113 driContext
->dri2
.read_stamp
= drawable
->dri2
.stamp
;
1116 /* If we're currently rendering to the front buffer, the rendering
1117 * that will happen next will probably dirty the front buffer. So
1118 * mark it as dirty here.
1120 if (brw_is_front_buffer_drawing(ctx
->DrawBuffer
))
1121 brw
->front_buffer_dirty
= true;
1123 /* Wait for the swapbuffers before the one we just emitted, so we
1124 * don't get too many swaps outstanding for apps that are GPU-heavy
1125 * but not CPU-heavy.
1127 * We're using intelDRI2Flush (called from the loader before
1128 * swapbuffer) and glFlush (for front buffer rendering) as the
1129 * indicator that a frame is done and then throttle when we get
1130 * here as we prepare to render the next frame. At this point for
1131 * round trips for swap/copy and getting new buffers are done and
1132 * we'll spend less time waiting on the GPU.
1134 * Unfortunately, we don't have a handle to the batch containing
1135 * the swap, and getting our hands on that doesn't seem worth it,
1136 * so we just us the first batch we emitted after the last swap.
1138 if (brw
->need_throttle
&& brw
->first_post_swapbuffers_batch
) {
1139 if (!brw
->disable_throttling
)
1140 drm_intel_bo_wait_rendering(brw
->first_post_swapbuffers_batch
);
1141 drm_intel_bo_unreference(brw
->first_post_swapbuffers_batch
);
1142 brw
->first_post_swapbuffers_batch
= NULL
;
1143 brw
->need_throttle
= false;
1148 * \brief Query DRI2 to obtain a DRIdrawable's buffers.
1150 * To determine which DRI buffers to request, examine the renderbuffers
1151 * attached to the drawable's framebuffer. Then request the buffers with
1152 * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
1154 * This is called from intel_update_renderbuffers().
1156 * \param drawable Drawable whose buffers are queried.
1157 * \param buffers [out] List of buffers returned by DRI2 query.
1158 * \param buffer_count [out] Number of buffers returned.
1160 * \see intel_update_renderbuffers()
1161 * \see DRI2GetBuffers()
1162 * \see DRI2GetBuffersWithFormat()
1165 intel_query_dri2_buffers(struct brw_context
*brw
,
1166 __DRIdrawable
*drawable
,
1167 __DRIbuffer
**buffers
,
1170 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1171 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1173 unsigned attachments
[8];
1175 struct intel_renderbuffer
*front_rb
;
1176 struct intel_renderbuffer
*back_rb
;
1178 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1179 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1181 memset(attachments
, 0, sizeof(attachments
));
1182 if ((brw_is_front_buffer_drawing(fb
) ||
1183 brw_is_front_buffer_reading(fb
) ||
1184 !back_rb
) && front_rb
) {
1185 /* If a fake front buffer is in use, then querying for
1186 * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
1187 * the real front buffer to the fake front buffer. So before doing the
1188 * query, we need to make sure all the pending drawing has landed in the
1189 * real front buffer.
1191 intel_batchbuffer_flush(brw
);
1192 intel_flush_front(&brw
->ctx
);
1194 attachments
[i
++] = __DRI_BUFFER_FRONT_LEFT
;
1195 attachments
[i
++] = intel_bits_per_pixel(front_rb
);
1196 } else if (front_rb
&& brw
->front_buffer_dirty
) {
1197 /* We have pending front buffer rendering, but we aren't querying for a
1198 * front buffer. If the front buffer we have is a fake front buffer,
1199 * the X server is going to throw it away when it processes the query.
1200 * So before doing the query, make sure all the pending drawing has
1201 * landed in the real front buffer.
1203 intel_batchbuffer_flush(brw
);
1204 intel_flush_front(&brw
->ctx
);
1208 attachments
[i
++] = __DRI_BUFFER_BACK_LEFT
;
1209 attachments
[i
++] = intel_bits_per_pixel(back_rb
);
1212 assert(i
<= ARRAY_SIZE(attachments
));
1214 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1219 drawable
->loaderPrivate
);
1223 * \brief Assign a DRI buffer's DRM region to a renderbuffer.
1225 * This is called from intel_update_renderbuffers().
1228 * DRI buffers whose attachment point is DRI2BufferStencil or
1229 * DRI2BufferDepthStencil are handled as special cases.
1231 * \param buffer_name is a human readable name, such as "dri2 front buffer",
1232 * that is passed to drm_intel_bo_gem_create_from_name().
1234 * \see intel_update_renderbuffers()
1237 intel_process_dri2_buffer(struct brw_context
*brw
,
1238 __DRIdrawable
*drawable
,
1239 __DRIbuffer
*buffer
,
1240 struct intel_renderbuffer
*rb
,
1241 const char *buffer_name
)
1243 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1249 unsigned num_samples
= rb
->Base
.Base
.NumSamples
;
1251 /* We try to avoid closing and reopening the same BO name, because the first
1252 * use of a mapping of the buffer involves a bunch of page faulting which is
1253 * moderately expensive.
1255 struct intel_mipmap_tree
*last_mt
;
1256 if (num_samples
== 0)
1259 last_mt
= rb
->singlesample_mt
;
1261 uint32_t old_name
= 0;
1263 /* The bo already has a name because the miptree was created by a
1264 * previous call to intel_process_dri2_buffer(). If a bo already has a
1265 * name, then drm_intel_bo_flink() is a low-cost getter. It does not
1266 * create a new name.
1268 drm_intel_bo_flink(last_mt
->bo
, &old_name
);
1271 if (old_name
== buffer
->name
)
1274 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
)) {
1276 "attaching buffer %d, at %d, cpp %d, pitch %d\n",
1277 buffer
->name
, buffer
->attachment
,
1278 buffer
->cpp
, buffer
->pitch
);
1281 intel_miptree_release(&rb
->mt
);
1282 bo
= drm_intel_bo_gem_create_from_name(brw
->bufmgr
, buffer_name
,
1286 "Failed to open BO for returned DRI2 buffer "
1287 "(%dx%d, %s, named %d).\n"
1288 "This is likely a bug in the X Server that will lead to a "
1290 drawable
->w
, drawable
->h
, buffer_name
, buffer
->name
);
1294 intel_update_winsys_renderbuffer_miptree(brw
, rb
, bo
,
1295 drawable
->w
, drawable
->h
,
1298 if (brw_is_front_buffer_drawing(fb
) &&
1299 (buffer
->attachment
== __DRI_BUFFER_FRONT_LEFT
||
1300 buffer
->attachment
== __DRI_BUFFER_FAKE_FRONT_LEFT
) &&
1301 rb
->Base
.Base
.NumSamples
> 1) {
1302 intel_renderbuffer_upsample(brw
, rb
);
1307 drm_intel_bo_unreference(bo
);
1311 * \brief Query DRI image loader to obtain a DRIdrawable's buffers.
1313 * To determine which DRI buffers to request, examine the renderbuffers
1314 * attached to the drawable's framebuffer. Then request the buffers from
1317 * This is called from intel_update_renderbuffers().
1319 * \param drawable Drawable whose buffers are queried.
1320 * \param buffers [out] List of buffers returned by DRI2 query.
1321 * \param buffer_count [out] Number of buffers returned.
1323 * \see intel_update_renderbuffers()
1327 intel_update_image_buffer(struct brw_context
*intel
,
1328 __DRIdrawable
*drawable
,
1329 struct intel_renderbuffer
*rb
,
1331 enum __DRIimageBufferMask buffer_type
)
1333 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1335 if (!rb
|| !buffer
->bo
)
1338 unsigned num_samples
= rb
->Base
.Base
.NumSamples
;
1340 /* Check and see if we're already bound to the right
1343 struct intel_mipmap_tree
*last_mt
;
1344 if (num_samples
== 0)
1347 last_mt
= rb
->singlesample_mt
;
1349 if (last_mt
&& last_mt
->bo
== buffer
->bo
)
1352 intel_update_winsys_renderbuffer_miptree(intel
, rb
, buffer
->bo
,
1353 buffer
->width
, buffer
->height
,
1356 if (brw_is_front_buffer_drawing(fb
) &&
1357 buffer_type
== __DRI_IMAGE_BUFFER_FRONT
&&
1358 rb
->Base
.Base
.NumSamples
> 1) {
1359 intel_renderbuffer_upsample(intel
, rb
);
1364 intel_update_image_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
)
1366 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1367 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1368 struct intel_renderbuffer
*front_rb
;
1369 struct intel_renderbuffer
*back_rb
;
1370 struct __DRIimageList images
;
1371 unsigned int format
;
1372 uint32_t buffer_mask
= 0;
1374 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1375 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1378 format
= intel_rb_format(back_rb
);
1380 format
= intel_rb_format(front_rb
);
1384 if (front_rb
&& (brw_is_front_buffer_drawing(fb
) ||
1385 brw_is_front_buffer_reading(fb
) || !back_rb
)) {
1386 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1390 buffer_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1392 (*screen
->image
.loader
->getBuffers
) (drawable
,
1393 driGLFormatToImageFormat(format
),
1394 &drawable
->dri2
.stamp
,
1395 drawable
->loaderPrivate
,
1399 if (images
.image_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1400 drawable
->w
= images
.front
->width
;
1401 drawable
->h
= images
.front
->height
;
1402 intel_update_image_buffer(brw
,
1406 __DRI_IMAGE_BUFFER_FRONT
);
1408 if (images
.image_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1409 drawable
->w
= images
.back
->width
;
1410 drawable
->h
= images
.back
->height
;
1411 intel_update_image_buffer(brw
,
1415 __DRI_IMAGE_BUFFER_BACK
);