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/extensions.h"
38 #include "main/imports.h"
39 #include "main/macros.h"
40 #include "main/points.h"
41 #include "main/version.h"
42 #include "main/vtxfmt.h"
43 #include "main/texobj.h"
45 #include "vbo/vbo_context.h"
47 #include "drivers/common/driverfuncs.h"
48 #include "drivers/common/meta.h"
51 #include "brw_context.h"
52 #include "brw_defines.h"
54 #include "brw_state.h"
56 #include "intel_batchbuffer.h"
57 #include "intel_buffer_objects.h"
58 #include "intel_buffers.h"
59 #include "intel_fbo.h"
60 #include "intel_mipmap_tree.h"
61 #include "intel_pixel.h"
62 #include "intel_image.h"
63 #include "intel_tex.h"
64 #include "intel_tex_obj.h"
66 #include "swrast_setup/swrast_setup.h"
68 #include "tnl/t_pipeline.h"
69 #include "util/ralloc.h"
71 /***************************************
72 * Mesa's Driver Functions
73 ***************************************/
76 brw_query_samples_for_format(struct gl_context
*ctx
, GLenum target
,
77 GLenum internalFormat
, int samples
[16])
79 struct brw_context
*brw
= brw_context(ctx
);
105 const char *const brw_vendor_string
= "Intel Open Source Technology Center";
108 brw_get_renderer_string(unsigned deviceID
)
111 static char buffer
[128];
115 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
116 #include "pci_ids/i965_pci_ids.h"
118 chipset
= "Unknown Intel Chipset";
122 (void) driGetRendererString(buffer
, chipset
, 0);
126 static const GLubyte
*
127 intel_get_string(struct gl_context
* ctx
, GLenum name
)
129 const struct brw_context
*const brw
= brw_context(ctx
);
133 return (GLubyte
*) brw_vendor_string
;
137 (GLubyte
*) brw_get_renderer_string(brw
->intelScreen
->deviceID
);
145 intel_viewport(struct gl_context
*ctx
)
147 struct brw_context
*brw
= brw_context(ctx
);
148 __DRIcontext
*driContext
= brw
->driContext
;
150 if (_mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
151 dri2InvalidateDrawable(driContext
->driDrawablePriv
);
152 dri2InvalidateDrawable(driContext
->driReadablePriv
);
157 intel_update_state(struct gl_context
* ctx
, GLuint new_state
)
159 struct brw_context
*brw
= brw_context(ctx
);
160 struct intel_texture_object
*tex_obj
;
161 struct intel_renderbuffer
*depth_irb
;
163 if (ctx
->swrast_context
)
164 _swrast_InvalidateState(ctx
, new_state
);
165 _vbo_InvalidateState(ctx
, new_state
);
167 brw
->NewGLState
|= new_state
;
169 _mesa_unlock_context_textures(ctx
);
171 /* Resolve the depth buffer's HiZ buffer. */
172 depth_irb
= intel_get_renderbuffer(ctx
->DrawBuffer
, BUFFER_DEPTH
);
174 intel_renderbuffer_resolve_hiz(brw
, depth_irb
);
176 /* Resolve depth buffer and render cache of each enabled texture. */
177 int maxEnabledUnit
= ctx
->Texture
._MaxEnabledTexImageUnit
;
178 for (int i
= 0; i
<= maxEnabledUnit
; i
++) {
179 if (!ctx
->Texture
.Unit
[i
]._Current
)
181 tex_obj
= intel_texture_object(ctx
->Texture
.Unit
[i
]._Current
);
182 if (!tex_obj
|| !tex_obj
->mt
)
184 intel_miptree_all_slices_resolve_depth(brw
, tex_obj
->mt
);
185 intel_miptree_resolve_color(brw
, tex_obj
->mt
);
186 brw_render_cache_set_check_flush(brw
, tex_obj
->mt
->bo
);
189 _mesa_lock_context_textures(ctx
);
192 #define flushFront(screen) ((screen)->image.loader ? (screen)->image.loader->flushFrontBuffer : (screen)->dri2.loader->flushFrontBuffer)
195 intel_flush_front(struct gl_context
*ctx
)
197 struct brw_context
*brw
= brw_context(ctx
);
198 __DRIcontext
*driContext
= brw
->driContext
;
199 __DRIdrawable
*driDrawable
= driContext
->driDrawablePriv
;
200 __DRIscreen
*const screen
= brw
->intelScreen
->driScrnPriv
;
202 if (brw
->front_buffer_dirty
&& _mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
203 if (flushFront(screen
) && driDrawable
&&
204 driDrawable
->loaderPrivate
) {
206 /* Resolve before flushing FAKE_FRONT_LEFT to FRONT_LEFT.
208 * This potentially resolves both front and back buffer. It
209 * is unnecessary to resolve the back, but harms nothing except
210 * performance. And no one cares about front-buffer render
213 intel_resolve_for_dri2_flush(brw
, driDrawable
);
214 intel_batchbuffer_flush(brw
);
216 flushFront(screen
)(driDrawable
, driDrawable
->loaderPrivate
);
218 /* We set the dirty bit in intel_prepare_render() if we're
219 * front buffer rendering once we get there.
221 brw
->front_buffer_dirty
= false;
227 intel_glFlush(struct gl_context
*ctx
)
229 struct brw_context
*brw
= brw_context(ctx
);
231 intel_batchbuffer_flush(brw
);
232 intel_flush_front(ctx
);
233 if (brw_is_front_buffer_drawing(ctx
->DrawBuffer
))
234 brw
->need_throttle
= true;
238 intel_finish(struct gl_context
* ctx
)
240 struct brw_context
*brw
= brw_context(ctx
);
244 if (brw
->batch
.last_bo
)
245 drm_intel_bo_wait_rendering(brw
->batch
.last_bo
);
249 brw_init_driver_functions(struct brw_context
*brw
,
250 struct dd_function_table
*functions
)
252 _mesa_init_driver_functions(functions
);
254 /* GLX uses DRI2 invalidate events to handle window resizing.
255 * Unfortunately, EGL does not - libEGL is written in XCB (not Xlib),
256 * which doesn't provide a mechanism for snooping the event queues.
258 * So EGL still relies on viewport hacks to handle window resizing.
259 * This should go away with DRI3000.
261 if (!brw
->driContext
->driScreenPriv
->dri2
.useInvalidate
)
262 functions
->Viewport
= intel_viewport
;
264 functions
->Flush
= intel_glFlush
;
265 functions
->Finish
= intel_finish
;
266 functions
->GetString
= intel_get_string
;
267 functions
->UpdateState
= intel_update_state
;
269 intelInitTextureFuncs(functions
);
270 intelInitTextureImageFuncs(functions
);
271 intelInitTextureSubImageFuncs(functions
);
272 intelInitTextureCopyImageFuncs(functions
);
273 intelInitCopyImageFuncs(functions
);
274 intelInitClearFuncs(functions
);
275 intelInitBufferFuncs(functions
);
276 intelInitPixelFuncs(functions
);
277 intelInitBufferObjectFuncs(functions
);
278 intel_init_syncobj_functions(functions
);
279 brw_init_object_purgeable_functions(functions
);
281 brwInitFragProgFuncs( functions
);
282 brw_init_common_queryobj_functions(functions
);
284 gen6_init_queryobj_functions(functions
);
286 gen4_init_queryobj_functions(functions
);
288 functions
->QuerySamplesForFormat
= brw_query_samples_for_format
;
290 functions
->NewTransformFeedback
= brw_new_transform_feedback
;
291 functions
->DeleteTransformFeedback
= brw_delete_transform_feedback
;
292 functions
->GetTransformFeedbackVertexCount
=
293 brw_get_transform_feedback_vertex_count
;
295 functions
->BeginTransformFeedback
= gen7_begin_transform_feedback
;
296 functions
->EndTransformFeedback
= gen7_end_transform_feedback
;
297 functions
->PauseTransformFeedback
= gen7_pause_transform_feedback
;
298 functions
->ResumeTransformFeedback
= gen7_resume_transform_feedback
;
300 functions
->BeginTransformFeedback
= brw_begin_transform_feedback
;
301 functions
->EndTransformFeedback
= brw_end_transform_feedback
;
305 functions
->GetSamplePosition
= gen6_get_sample_position
;
309 brw_initialize_context_constants(struct brw_context
*brw
)
311 struct gl_context
*ctx
= &brw
->ctx
;
313 unsigned max_samplers
=
314 brw
->gen
>= 8 || brw
->is_haswell
? BRW_MAX_TEX_UNIT
: 16;
316 ctx
->Const
.QueryCounterBits
.Timestamp
= 36;
318 ctx
->Const
.StripTextureBorder
= true;
320 ctx
->Const
.MaxDualSourceDrawBuffers
= 1;
321 ctx
->Const
.MaxDrawBuffers
= BRW_MAX_DRAW_BUFFERS
;
322 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= max_samplers
;
323 ctx
->Const
.MaxTextureCoordUnits
= 8; /* Mesa limit */
324 ctx
->Const
.MaxTextureUnits
=
325 MIN2(ctx
->Const
.MaxTextureCoordUnits
,
326 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
327 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= max_samplers
;
329 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= max_samplers
;
331 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= 0;
332 if (_mesa_extension_override_enables
.ARB_compute_shader
) {
333 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
= BRW_MAX_TEX_UNIT
;
334 ctx
->Const
.MaxUniformBufferBindings
+= 12;
336 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
= 0;
338 ctx
->Const
.MaxCombinedTextureImageUnits
=
339 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
+
340 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
+
341 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
+
342 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
;
344 ctx
->Const
.MaxTextureLevels
= 14; /* 8192 */
345 if (ctx
->Const
.MaxTextureLevels
> MAX_TEXTURE_LEVELS
)
346 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
347 ctx
->Const
.Max3DTextureLevels
= 12; /* 2048 */
348 ctx
->Const
.MaxCubeTextureLevels
= 14; /* 8192 */
349 ctx
->Const
.MaxTextureMbytes
= 1536;
352 ctx
->Const
.MaxArrayTextureLayers
= 2048;
354 ctx
->Const
.MaxArrayTextureLayers
= 512;
356 ctx
->Const
.MaxTextureRectSize
= 1 << 12;
358 ctx
->Const
.MaxTextureMaxAnisotropy
= 16.0;
360 ctx
->Const
.MaxRenderbufferSize
= 8192;
362 /* Hardware only supports a limited number of transform feedback buffers.
363 * So we need to override the Mesa default (which is based only on software
366 ctx
->Const
.MaxTransformFeedbackBuffers
= BRW_MAX_SOL_BUFFERS
;
368 /* On Gen6, in the worst case, we use up one binding table entry per
369 * transform feedback component (see comments above the definition of
370 * BRW_MAX_SOL_BINDINGS, in brw_context.h), so we need to advertise a value
371 * for MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS equal to
372 * BRW_MAX_SOL_BINDINGS.
374 * In "separate components" mode, we need to divide this value by
375 * BRW_MAX_SOL_BUFFERS, so that the total number of binding table entries
376 * used up by all buffers will not exceed BRW_MAX_SOL_BINDINGS.
378 ctx
->Const
.MaxTransformFeedbackInterleavedComponents
= BRW_MAX_SOL_BINDINGS
;
379 ctx
->Const
.MaxTransformFeedbackSeparateComponents
=
380 BRW_MAX_SOL_BINDINGS
/ BRW_MAX_SOL_BUFFERS
;
382 ctx
->Const
.AlwaysUseGetTransformFeedbackVertexCount
= true;
385 const int *msaa_modes
= intel_supported_msaa_modes(brw
->intelScreen
);
386 const int clamp_max_samples
=
387 driQueryOptioni(&brw
->optionCache
, "clamp_max_samples");
389 if (clamp_max_samples
< 0) {
390 max_samples
= msaa_modes
[0];
392 /* Select the largest supported MSAA mode that does not exceed
396 for (int i
= 0; msaa_modes
[i
] != 0; ++i
) {
397 if (msaa_modes
[i
] <= clamp_max_samples
) {
398 max_samples
= msaa_modes
[i
];
404 ctx
->Const
.MaxSamples
= max_samples
;
405 ctx
->Const
.MaxColorTextureSamples
= max_samples
;
406 ctx
->Const
.MaxDepthTextureSamples
= max_samples
;
407 ctx
->Const
.MaxIntegerSamples
= max_samples
;
409 /* gen6_set_sample_maps() sets SampleMap{2,4,8}x variables which are used
410 * to map indices of rectangular grid to sample numbers within a pixel.
411 * These variables are used by GL_EXT_framebuffer_multisample_blit_scaled
412 * extension implementation. For more details see the comment above
413 * gen6_set_sample_maps() definition.
415 gen6_set_sample_maps(ctx
);
418 ctx
->Const
.MaxProgramTextureGatherComponents
= 4;
419 else if (brw
->gen
== 6)
420 ctx
->Const
.MaxProgramTextureGatherComponents
= 1;
422 ctx
->Const
.MinLineWidth
= 1.0;
423 ctx
->Const
.MinLineWidthAA
= 1.0;
424 if (brw
->gen
>= 9 || brw
->is_cherryview
) {
425 ctx
->Const
.MaxLineWidth
= 40.0;
426 ctx
->Const
.MaxLineWidthAA
= 40.0;
427 ctx
->Const
.LineWidthGranularity
= 0.125;
428 } else if (brw
->gen
>= 6) {
429 ctx
->Const
.MaxLineWidth
= 7.875;
430 ctx
->Const
.MaxLineWidthAA
= 7.875;
431 ctx
->Const
.LineWidthGranularity
= 0.125;
433 ctx
->Const
.MaxLineWidth
= 7.0;
434 ctx
->Const
.MaxLineWidthAA
= 7.0;
435 ctx
->Const
.LineWidthGranularity
= 0.5;
438 ctx
->Const
.MinPointSize
= 1.0;
439 ctx
->Const
.MinPointSizeAA
= 1.0;
440 ctx
->Const
.MaxPointSize
= 255.0;
441 ctx
->Const
.MaxPointSizeAA
= 255.0;
442 ctx
->Const
.PointSizeGranularity
= 1.0;
444 if (brw
->gen
>= 5 || brw
->is_g4x
)
445 ctx
->Const
.MaxClipPlanes
= 8;
447 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeInstructions
= 16 * 1024;
448 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAluInstructions
= 0;
449 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTexInstructions
= 0;
450 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTexIndirections
= 0;
451 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAluInstructions
= 0;
452 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTexInstructions
= 0;
453 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTexIndirections
= 0;
454 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAttribs
= 16;
455 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeTemps
= 256;
456 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeAddressRegs
= 1;
457 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeParameters
= 1024;
458 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxEnvParams
=
459 MIN2(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxNativeParameters
,
460 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxEnvParams
);
462 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeInstructions
= 1024;
463 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAluInstructions
= 1024;
464 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTexInstructions
= 1024;
465 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTexIndirections
= 1024;
466 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAttribs
= 12;
467 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeTemps
= 256;
468 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeAddressRegs
= 0;
469 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeParameters
= 1024;
470 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxEnvParams
=
471 MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxNativeParameters
,
472 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxEnvParams
);
474 /* Fragment shaders use real, 32-bit twos-complement integers for all
477 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.RangeMin
= 31;
478 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.RangeMax
= 30;
479 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
.Precision
= 0;
480 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].HighInt
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
;
481 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MediumInt
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].LowInt
;
484 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
485 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
486 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
487 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicCounters
= MAX_ATOMIC_COUNTERS
;
488 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
= BRW_MAX_ABO
;
489 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
= BRW_MAX_ABO
;
490 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
= BRW_MAX_ABO
;
491 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicBuffers
= BRW_MAX_ABO
;
492 ctx
->Const
.MaxCombinedAtomicBuffers
= 3 * BRW_MAX_ABO
;
495 /* Gen6 converts quads to polygon in beginning of 3D pipeline,
496 * but we're not sure how it's actually done for vertex order,
497 * that affect provoking vertex decision. Always use last vertex
498 * convention for quad primitive which works as expected for now.
501 ctx
->Const
.QuadsFollowProvokingVertexConvention
= false;
503 ctx
->Const
.NativeIntegers
= true;
504 ctx
->Const
.VertexID_is_zero_based
= true;
506 /* Regarding the CMP instruction, the Ivybridge PRM says:
508 * "For each enabled channel 0b or 1b is assigned to the appropriate flag
509 * bit and 0/all zeros or all ones (e.g, byte 0xFF, word 0xFFFF, DWord
510 * 0xFFFFFFFF) is assigned to dst."
512 * but PRMs for earlier generations say
514 * "In dword format, one GRF may store up to 8 results. When the register
515 * is used later as a vector of Booleans, as only LSB at each channel
516 * contains meaning [sic] data, software should make sure all higher bits
517 * are masked out (e.g. by 'and-ing' an [sic] 0x01 constant)."
519 * We select the representation of a true boolean uniform to match what the
520 * CMP instruction returns.
522 * The Sandybridge BSpec's description of the CMP instruction matches that
523 * of the Ivybridge PRM. (The description in the Sandybridge PRM is seems
524 * to have not been updated from Ironlake). Its CMP instruction behaves like
525 * Ivybridge and newer.
528 ctx
->Const
.UniformBooleanTrue
= ~0;
530 ctx
->Const
.UniformBooleanTrue
= 1;
532 /* From the gen4 PRM, volume 4 page 127:
534 * "For SURFTYPE_BUFFER non-rendertarget surfaces, this field specifies
535 * the base address of the first element of the surface, computed in
536 * software by adding the surface base address to the byte offset of
537 * the element in the buffer."
539 * However, unaligned accesses are slower, so enforce buffer alignment.
541 ctx
->Const
.UniformBufferOffsetAlignment
= 16;
542 ctx
->Const
.TextureBufferOffsetAlignment
= 16;
545 ctx
->Const
.MaxVarying
= 32;
546 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
= 128;
547 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
= 64;
548 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
= 128;
549 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
= 128;
552 /* We want the GLSL compiler to emit code that uses condition codes */
553 for (int i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
554 ctx
->Const
.ShaderCompilerOptions
[i
].MaxIfDepth
= brw
->gen
< 6 ? 16 : UINT_MAX
;
555 ctx
->Const
.ShaderCompilerOptions
[i
].EmitCondCodes
= true;
556 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoNoise
= true;
557 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoMainReturn
= true;
558 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoIndirectInput
= true;
559 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoIndirectOutput
=
560 (i
== MESA_SHADER_FRAGMENT
);
561 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoIndirectTemp
=
562 (i
== MESA_SHADER_FRAGMENT
);
563 ctx
->Const
.ShaderCompilerOptions
[i
].EmitNoIndirectUniform
= false;
564 ctx
->Const
.ShaderCompilerOptions
[i
].LowerClipDistance
= true;
567 ctx
->Const
.ShaderCompilerOptions
[MESA_SHADER_VERTEX
].OptimizeForAOS
= true;
568 ctx
->Const
.ShaderCompilerOptions
[MESA_SHADER_GEOMETRY
].OptimizeForAOS
= true;
570 /* ARB_viewport_array */
571 if (brw
->gen
>= 7 && ctx
->API
== API_OPENGL_CORE
) {
572 ctx
->Const
.MaxViewports
= GEN7_NUM_VIEWPORTS
;
573 ctx
->Const
.ViewportSubpixelBits
= 0;
575 /* Cast to float before negating becuase MaxViewportWidth is unsigned.
577 ctx
->Const
.ViewportBounds
.Min
= -(float)ctx
->Const
.MaxViewportWidth
;
578 ctx
->Const
.ViewportBounds
.Max
= ctx
->Const
.MaxViewportWidth
;
581 /* ARB_gpu_shader5 */
583 ctx
->Const
.MaxVertexStreams
= MIN2(4, MAX_VERTEX_STREAMS
);
587 * Process driconf (drirc) options, setting appropriate context flags.
589 * intelInitExtensions still pokes at optionCache directly, in order to
590 * avoid advertising various extensions. No flags are set, so it makes
591 * sense to continue doing that there.
594 brw_process_driconf_options(struct brw_context
*brw
)
596 struct gl_context
*ctx
= &brw
->ctx
;
598 driOptionCache
*options
= &brw
->optionCache
;
599 driParseConfigFiles(options
, &brw
->intelScreen
->optionCache
,
600 brw
->driContext
->driScreenPriv
->myNum
, "i965");
602 int bo_reuse_mode
= driQueryOptioni(options
, "bo_reuse");
603 switch (bo_reuse_mode
) {
604 case DRI_CONF_BO_REUSE_DISABLED
:
606 case DRI_CONF_BO_REUSE_ALL
:
607 intel_bufmgr_gem_enable_reuse(brw
->bufmgr
);
611 if (!driQueryOptionb(options
, "hiz")) {
612 brw
->has_hiz
= false;
613 /* On gen6, you can only do separate stencil with HIZ. */
615 brw
->has_separate_stencil
= false;
618 if (driQueryOptionb(options
, "always_flush_batch")) {
619 fprintf(stderr
, "flushing batchbuffer before/after each draw call\n");
620 brw
->always_flush_batch
= true;
623 if (driQueryOptionb(options
, "always_flush_cache")) {
624 fprintf(stderr
, "flushing GPU caches before/after each draw call\n");
625 brw
->always_flush_cache
= true;
628 if (driQueryOptionb(options
, "disable_throttling")) {
629 fprintf(stderr
, "disabling flush throttling\n");
630 brw
->disable_throttling
= true;
633 brw
->precompile
= driQueryOptionb(&brw
->optionCache
, "shader_precompile");
635 ctx
->Const
.ForceGLSLExtensionsWarn
=
636 driQueryOptionb(options
, "force_glsl_extensions_warn");
638 ctx
->Const
.DisableGLSLLineContinuations
=
639 driQueryOptionb(options
, "disable_glsl_line_continuations");
641 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
=
642 driQueryOptionb(options
, "allow_glsl_extension_directive_midshader");
646 brwCreateContext(gl_api api
,
647 const struct gl_config
*mesaVis
,
648 __DRIcontext
*driContextPriv
,
649 unsigned major_version
,
650 unsigned minor_version
,
653 unsigned *dri_ctx_error
,
654 void *sharedContextPrivate
)
656 __DRIscreen
*sPriv
= driContextPriv
->driScreenPriv
;
657 struct gl_context
*shareCtx
= (struct gl_context
*) sharedContextPrivate
;
658 struct intel_screen
*screen
= sPriv
->driverPrivate
;
659 const struct brw_device_info
*devinfo
= screen
->devinfo
;
660 struct dd_function_table functions
;
662 /* Only allow the __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS flag if the kernel
663 * provides us with context reset notifications.
665 uint32_t allowed_flags
= __DRI_CTX_FLAG_DEBUG
666 | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
;
668 if (screen
->has_context_reset_notification
)
669 allowed_flags
|= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
;
671 if (flags
& ~allowed_flags
) {
672 *dri_ctx_error
= __DRI_CTX_ERROR_UNKNOWN_FLAG
;
676 struct brw_context
*brw
= rzalloc(NULL
, struct brw_context
);
678 fprintf(stderr
, "%s: failed to alloc context\n", __FUNCTION__
);
679 *dri_ctx_error
= __DRI_CTX_ERROR_NO_MEMORY
;
683 driContextPriv
->driverPrivate
= brw
;
684 brw
->driContext
= driContextPriv
;
685 brw
->intelScreen
= screen
;
686 brw
->bufmgr
= screen
->bufmgr
;
688 brw
->gen
= devinfo
->gen
;
689 brw
->gt
= devinfo
->gt
;
690 brw
->is_g4x
= devinfo
->is_g4x
;
691 brw
->is_baytrail
= devinfo
->is_baytrail
;
692 brw
->is_haswell
= devinfo
->is_haswell
;
693 brw
->is_cherryview
= devinfo
->is_cherryview
;
694 brw
->has_llc
= devinfo
->has_llc
;
695 brw
->has_hiz
= devinfo
->has_hiz_and_separate_stencil
;
696 brw
->has_separate_stencil
= devinfo
->has_hiz_and_separate_stencil
;
697 brw
->has_pln
= devinfo
->has_pln
;
698 brw
->has_compr4
= devinfo
->has_compr4
;
699 brw
->has_surface_tile_offset
= devinfo
->has_surface_tile_offset
;
700 brw
->has_negative_rhw_bug
= devinfo
->has_negative_rhw_bug
;
701 brw
->needs_unlit_centroid_workaround
=
702 devinfo
->needs_unlit_centroid_workaround
;
704 brw
->must_use_separate_stencil
= screen
->hw_must_use_separate_stencil
;
705 brw
->has_swizzling
= screen
->hw_has_swizzling
;
707 brw
->vs
.base
.stage
= MESA_SHADER_VERTEX
;
708 brw
->gs
.base
.stage
= MESA_SHADER_GEOMETRY
;
709 brw
->wm
.base
.stage
= MESA_SHADER_FRAGMENT
;
711 gen8_init_vtable_surface_functions(brw
);
712 brw
->vtbl
.emit_depth_stencil_hiz
= gen8_emit_depth_stencil_hiz
;
713 } else if (brw
->gen
>= 7) {
714 gen7_init_vtable_surface_functions(brw
);
715 brw
->vtbl
.emit_depth_stencil_hiz
= gen7_emit_depth_stencil_hiz
;
716 } else if (brw
->gen
>= 6) {
717 gen6_init_vtable_surface_functions(brw
);
718 brw
->vtbl
.emit_depth_stencil_hiz
= gen6_emit_depth_stencil_hiz
;
720 gen4_init_vtable_surface_functions(brw
);
721 brw
->vtbl
.emit_depth_stencil_hiz
= brw_emit_depth_stencil_hiz
;
724 brw_init_driver_functions(brw
, &functions
);
727 functions
.GetGraphicsResetStatus
= brw_get_graphics_reset_status
;
729 struct gl_context
*ctx
= &brw
->ctx
;
731 if (!_mesa_initialize_context(ctx
, api
, mesaVis
, shareCtx
, &functions
)) {
732 *dri_ctx_error
= __DRI_CTX_ERROR_NO_MEMORY
;
733 fprintf(stderr
, "%s: failed to init mesa context\n", __FUNCTION__
);
734 intelDestroyContext(driContextPriv
);
738 driContextSetFlags(ctx
, flags
);
740 /* Initialize the software rasterizer and helper modules.
742 * As of GL 3.1 core, the gen4+ driver doesn't need the swrast context for
743 * software fallbacks (which we have to support on legacy GL to do weird
744 * glDrawPixels(), glBitmap(), and other functions).
746 if (api
!= API_OPENGL_CORE
&& api
!= API_OPENGLES2
) {
747 _swrast_CreateContext(ctx
);
750 _vbo_CreateContext(ctx
);
751 if (ctx
->swrast_context
) {
752 _tnl_CreateContext(ctx
);
753 TNL_CONTEXT(ctx
)->Driver
.RunPipeline
= _tnl_run_pipeline
;
754 _swsetup_CreateContext(ctx
);
756 /* Configure swrast to match hardware characteristics: */
757 _swrast_allow_pixel_fog(ctx
, false);
758 _swrast_allow_vertex_fog(ctx
, true);
761 _mesa_meta_init(ctx
);
763 brw_process_driconf_options(brw
);
764 brw_process_intel_debug_variable(brw
);
765 brw_initialize_context_constants(brw
);
767 ctx
->Const
.ResetStrategy
= notify_reset
768 ? GL_LOSE_CONTEXT_ON_RESET_ARB
: GL_NO_RESET_NOTIFICATION_ARB
;
770 /* Reinitialize the context point state. It depends on ctx->Const values. */
771 _mesa_init_point(ctx
);
775 intel_batchbuffer_init(brw
);
778 /* Create a new hardware context. Using a hardware context means that
779 * our GPU state will be saved/restored on context switch, allowing us
780 * to assume that the GPU is in the same state we left it in.
782 * This is required for transform feedback buffer offsets, query objects,
783 * and also allows us to reduce how much state we have to emit.
785 brw
->hw_ctx
= drm_intel_gem_context_create(brw
->bufmgr
);
788 fprintf(stderr
, "Gen6+ requires Kernel 3.6 or later.\n");
789 intelDestroyContext(driContextPriv
);
796 intelInitExtensions(ctx
);
798 brw_init_surface_formats(brw
);
800 brw
->max_vs_threads
= devinfo
->max_vs_threads
;
801 brw
->max_gs_threads
= devinfo
->max_gs_threads
;
802 brw
->max_wm_threads
= devinfo
->max_wm_threads
;
803 brw
->urb
.size
= devinfo
->urb
.size
;
804 brw
->urb
.min_vs_entries
= devinfo
->urb
.min_vs_entries
;
805 brw
->urb
.max_vs_entries
= devinfo
->urb
.max_vs_entries
;
806 brw
->urb
.max_gs_entries
= devinfo
->urb
.max_gs_entries
;
808 /* Estimate the size of the mappable aperture into the GTT. There's an
809 * ioctl to get the whole GTT size, but not one to get the mappable subset.
810 * It turns out it's basically always 256MB, though some ancient hardware
813 uint32_t gtt_size
= 256 * 1024 * 1024;
815 /* We don't want to map two objects such that a memcpy between them would
816 * just fault one mapping in and then the other over and over forever. So
817 * we would need to divide the GTT size by 2. Additionally, some GTT is
818 * taken up by things like the framebuffer and the ringbuffer and such, so
819 * be more conservative.
821 brw
->max_gtt_map_object_size
= gtt_size
/ 4;
824 brw
->urb
.gs_present
= false;
826 brw
->prim_restart
.in_progress
= false;
827 brw
->prim_restart
.enable_cut_index
= false;
828 brw
->gs
.enabled
= false;
829 brw
->sf
.viewport_transform_enable
= true;
831 ctx
->VertexProgram
._MaintainTnlProgram
= true;
832 ctx
->FragmentProgram
._MaintainTexEnvProgram
= true;
834 brw_draw_init( brw
);
836 if ((flags
& __DRI_CTX_FLAG_DEBUG
) != 0) {
837 /* Turn on some extra GL_ARB_debug_output generation. */
838 brw
->perf_debug
= true;
841 if ((flags
& __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
) != 0)
842 ctx
->Const
.ContextFlags
|= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB
;
844 if (INTEL_DEBUG
& DEBUG_SHADER_TIME
)
845 brw_init_shader_time(brw
);
847 _mesa_compute_version(ctx
);
849 _mesa_initialize_dispatch_tables(ctx
);
850 _mesa_initialize_vbo_vtxfmt(ctx
);
852 if (ctx
->Extensions
.AMD_performance_monitor
) {
853 brw_init_performance_monitors(brw
);
856 vbo_use_buffer_objects(ctx
);
857 vbo_always_unmap_buffers(ctx
);
863 intelDestroyContext(__DRIcontext
* driContextPriv
)
865 struct brw_context
*brw
=
866 (struct brw_context
*) driContextPriv
->driverPrivate
;
867 struct gl_context
*ctx
= &brw
->ctx
;
869 assert(brw
); /* should never be null */
873 /* Dump a final BMP in case the application doesn't call SwapBuffers */
874 if (INTEL_DEBUG
& DEBUG_AUB
) {
875 intel_batchbuffer_flush(brw
);
876 aub_dump_bmp(&brw
->ctx
);
879 _mesa_meta_free(&brw
->ctx
);
880 brw_meta_fast_clear_free(brw
);
882 if (INTEL_DEBUG
& DEBUG_SHADER_TIME
) {
883 /* Force a report. */
884 brw
->shader_time
.report_time
= 0;
886 brw_collect_and_report_shader_time(brw
);
887 brw_destroy_shader_time(brw
);
890 brw_destroy_state(brw
);
891 brw_draw_destroy(brw
);
893 drm_intel_bo_unreference(brw
->curbe
.curbe_bo
);
895 drm_intel_gem_context_destroy(brw
->hw_ctx
);
897 if (ctx
->swrast_context
) {
898 _swsetup_DestroyContext(&brw
->ctx
);
899 _tnl_DestroyContext(&brw
->ctx
);
901 _vbo_DestroyContext(&brw
->ctx
);
903 if (ctx
->swrast_context
)
904 _swrast_DestroyContext(&brw
->ctx
);
906 intel_batchbuffer_free(brw
);
908 drm_intel_bo_unreference(brw
->first_post_swapbuffers_batch
);
909 brw
->first_post_swapbuffers_batch
= NULL
;
911 driDestroyOptionCache(&brw
->optionCache
);
913 /* free the Mesa context */
914 _mesa_free_context_data(&brw
->ctx
);
917 driContextPriv
->driverPrivate
= NULL
;
921 intelUnbindContext(__DRIcontext
* driContextPriv
)
923 /* Unset current context and dispath table */
924 _mesa_make_current(NULL
, NULL
, NULL
);
930 * Fixes up the context for GLES23 with our default-to-sRGB-capable behavior
931 * on window system framebuffers.
933 * Desktop GL is fairly reasonable in its handling of sRGB: You can ask if
934 * your renderbuffer can do sRGB encode, and you can flip a switch that does
935 * sRGB encode if the renderbuffer can handle it. You can ask specifically
936 * for a visual where you're guaranteed to be capable, but it turns out that
937 * everyone just makes all their ARGB8888 visuals capable and doesn't offer
938 * incapable ones, becuase there's no difference between the two in resources
939 * used. Applications thus get built that accidentally rely on the default
940 * visual choice being sRGB, so we make ours sRGB capable. Everything sounds
943 * But for GLES2/3, they decided that it was silly to not turn on sRGB encode
944 * for sRGB renderbuffers you made with the GL_EXT_texture_sRGB equivalent.
945 * So they removed the enable knob and made it "if the renderbuffer is sRGB
946 * capable, do sRGB encode". Then, for your window system renderbuffers, you
947 * can ask for sRGB visuals and get sRGB encode, or not ask for sRGB visuals
948 * and get no sRGB encode (assuming that both kinds of visual are available).
949 * Thus our choice to support sRGB by default on our visuals for desktop would
950 * result in broken rendering of GLES apps that aren't expecting sRGB encode.
952 * Unfortunately, renderbuffer setup happens before a context is created. So
953 * in intel_screen.c we always set up sRGB, and here, if you're a GLES2/3
954 * context (without an sRGB visual, though we don't have sRGB visuals exposed
955 * yet), we go turn that back off before anyone finds out.
958 intel_gles3_srgb_workaround(struct brw_context
*brw
,
959 struct gl_framebuffer
*fb
)
961 struct gl_context
*ctx
= &brw
->ctx
;
963 if (_mesa_is_desktop_gl(ctx
) || !fb
->Visual
.sRGBCapable
)
966 /* Some day when we support the sRGB capable bit on visuals available for
967 * GLES, we'll need to respect that and not disable things here.
969 fb
->Visual
.sRGBCapable
= false;
970 for (int i
= 0; i
< BUFFER_COUNT
; i
++) {
971 if (fb
->Attachment
[i
].Renderbuffer
&&
972 fb
->Attachment
[i
].Renderbuffer
->Format
== MESA_FORMAT_B8G8R8A8_SRGB
) {
973 fb
->Attachment
[i
].Renderbuffer
->Format
= MESA_FORMAT_B8G8R8A8_UNORM
;
979 intelMakeCurrent(__DRIcontext
* driContextPriv
,
980 __DRIdrawable
* driDrawPriv
,
981 __DRIdrawable
* driReadPriv
)
983 struct brw_context
*brw
;
984 GET_CURRENT_CONTEXT(curCtx
);
987 brw
= (struct brw_context
*) driContextPriv
->driverPrivate
;
991 /* According to the glXMakeCurrent() man page: "Pending commands to
992 * the previous context, if any, are flushed before it is released."
993 * But only flush if we're actually changing contexts.
995 if (brw_context(curCtx
) && brw_context(curCtx
) != brw
) {
999 if (driContextPriv
) {
1000 struct gl_context
*ctx
= &brw
->ctx
;
1001 struct gl_framebuffer
*fb
, *readFb
;
1003 if (driDrawPriv
== NULL
) {
1004 fb
= _mesa_get_incomplete_framebuffer();
1006 fb
= driDrawPriv
->driverPrivate
;
1007 driContextPriv
->dri2
.draw_stamp
= driDrawPriv
->dri2
.stamp
- 1;
1010 if (driReadPriv
== NULL
) {
1011 readFb
= _mesa_get_incomplete_framebuffer();
1013 readFb
= driReadPriv
->driverPrivate
;
1014 driContextPriv
->dri2
.read_stamp
= driReadPriv
->dri2
.stamp
- 1;
1017 /* The sRGB workaround changes the renderbuffer's format. We must change
1018 * the format before the renderbuffer's miptree get's allocated, otherwise
1019 * the formats of the renderbuffer and its miptree will differ.
1021 intel_gles3_srgb_workaround(brw
, fb
);
1022 intel_gles3_srgb_workaround(brw
, readFb
);
1024 /* If the context viewport hasn't been initialized, force a call out to
1025 * the loader to get buffers so we have a drawable size for the initial
1027 if (!brw
->ctx
.ViewportInitialized
)
1028 intel_prepare_render(brw
);
1030 _mesa_make_current(ctx
, fb
, readFb
);
1032 _mesa_make_current(NULL
, NULL
, NULL
);
1039 intel_resolve_for_dri2_flush(struct brw_context
*brw
,
1040 __DRIdrawable
*drawable
)
1043 /* MSAA and fast color clear are not supported, so don't waste time
1044 * checking whether a resolve is needed.
1049 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1050 struct intel_renderbuffer
*rb
;
1052 /* Usually, only the back buffer will need to be downsampled. However,
1053 * the front buffer will also need it if the user has rendered into it.
1055 static const gl_buffer_index buffers
[2] = {
1060 for (int i
= 0; i
< 2; ++i
) {
1061 rb
= intel_get_renderbuffer(fb
, buffers
[i
]);
1062 if (rb
== NULL
|| rb
->mt
== NULL
)
1064 if (rb
->mt
->num_samples
<= 1)
1065 intel_miptree_resolve_color(brw
, rb
->mt
);
1067 intel_renderbuffer_downsample(brw
, rb
);
1072 intel_bits_per_pixel(const struct intel_renderbuffer
*rb
)
1074 return _mesa_get_format_bytes(intel_rb_format(rb
)) * 8;
1078 intel_query_dri2_buffers(struct brw_context
*brw
,
1079 __DRIdrawable
*drawable
,
1080 __DRIbuffer
**buffers
,
1084 intel_process_dri2_buffer(struct brw_context
*brw
,
1085 __DRIdrawable
*drawable
,
1086 __DRIbuffer
*buffer
,
1087 struct intel_renderbuffer
*rb
,
1088 const char *buffer_name
);
1091 intel_update_image_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
);
1094 intel_update_dri2_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
)
1096 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1097 struct intel_renderbuffer
*rb
;
1098 __DRIbuffer
*buffers
= NULL
;
1100 const char *region_name
;
1102 /* Set this up front, so that in case our buffers get invalidated
1103 * while we're getting new buffers, we don't clobber the stamp and
1104 * thus ignore the invalidate. */
1105 drawable
->lastStamp
= drawable
->dri2
.stamp
;
1107 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
))
1108 fprintf(stderr
, "enter %s, drawable %p\n", __func__
, drawable
);
1110 intel_query_dri2_buffers(brw
, drawable
, &buffers
, &count
);
1112 if (buffers
== NULL
)
1115 for (i
= 0; i
< count
; i
++) {
1116 switch (buffers
[i
].attachment
) {
1117 case __DRI_BUFFER_FRONT_LEFT
:
1118 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1119 region_name
= "dri2 front buffer";
1122 case __DRI_BUFFER_FAKE_FRONT_LEFT
:
1123 rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1124 region_name
= "dri2 fake front buffer";
1127 case __DRI_BUFFER_BACK_LEFT
:
1128 rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1129 region_name
= "dri2 back buffer";
1132 case __DRI_BUFFER_DEPTH
:
1133 case __DRI_BUFFER_HIZ
:
1134 case __DRI_BUFFER_DEPTH_STENCIL
:
1135 case __DRI_BUFFER_STENCIL
:
1136 case __DRI_BUFFER_ACCUM
:
1139 "unhandled buffer attach event, attachment type %d\n",
1140 buffers
[i
].attachment
);
1144 intel_process_dri2_buffer(brw
, drawable
, &buffers
[i
], rb
, region_name
);
1150 intel_update_renderbuffers(__DRIcontext
*context
, __DRIdrawable
*drawable
)
1152 struct brw_context
*brw
= context
->driverPrivate
;
1153 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1155 /* Set this up front, so that in case our buffers get invalidated
1156 * while we're getting new buffers, we don't clobber the stamp and
1157 * thus ignore the invalidate. */
1158 drawable
->lastStamp
= drawable
->dri2
.stamp
;
1160 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
))
1161 fprintf(stderr
, "enter %s, drawable %p\n", __func__
, drawable
);
1163 if (screen
->image
.loader
)
1164 intel_update_image_buffers(brw
, drawable
);
1166 intel_update_dri2_buffers(brw
, drawable
);
1168 driUpdateFramebufferSize(&brw
->ctx
, drawable
);
1172 * intel_prepare_render should be called anywhere that curent read/drawbuffer
1173 * state is required.
1176 intel_prepare_render(struct brw_context
*brw
)
1178 struct gl_context
*ctx
= &brw
->ctx
;
1179 __DRIcontext
*driContext
= brw
->driContext
;
1180 __DRIdrawable
*drawable
;
1182 drawable
= driContext
->driDrawablePriv
;
1183 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.draw_stamp
) {
1184 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
1185 intel_update_renderbuffers(driContext
, drawable
);
1186 driContext
->dri2
.draw_stamp
= drawable
->dri2
.stamp
;
1189 drawable
= driContext
->driReadablePriv
;
1190 if (drawable
&& drawable
->dri2
.stamp
!= driContext
->dri2
.read_stamp
) {
1191 if (drawable
->lastStamp
!= drawable
->dri2
.stamp
)
1192 intel_update_renderbuffers(driContext
, drawable
);
1193 driContext
->dri2
.read_stamp
= drawable
->dri2
.stamp
;
1196 /* If we're currently rendering to the front buffer, the rendering
1197 * that will happen next will probably dirty the front buffer. So
1198 * mark it as dirty here.
1200 if (brw_is_front_buffer_drawing(ctx
->DrawBuffer
))
1201 brw
->front_buffer_dirty
= true;
1203 /* Wait for the swapbuffers before the one we just emitted, so we
1204 * don't get too many swaps outstanding for apps that are GPU-heavy
1205 * but not CPU-heavy.
1207 * We're using intelDRI2Flush (called from the loader before
1208 * swapbuffer) and glFlush (for front buffer rendering) as the
1209 * indicator that a frame is done and then throttle when we get
1210 * here as we prepare to render the next frame. At this point for
1211 * round trips for swap/copy and getting new buffers are done and
1212 * we'll spend less time waiting on the GPU.
1214 * Unfortunately, we don't have a handle to the batch containing
1215 * the swap, and getting our hands on that doesn't seem worth it,
1216 * so we just us the first batch we emitted after the last swap.
1218 if (brw
->need_throttle
&& brw
->first_post_swapbuffers_batch
) {
1219 if (!brw
->disable_throttling
)
1220 drm_intel_bo_wait_rendering(brw
->first_post_swapbuffers_batch
);
1221 drm_intel_bo_unreference(brw
->first_post_swapbuffers_batch
);
1222 brw
->first_post_swapbuffers_batch
= NULL
;
1223 brw
->need_throttle
= false;
1228 * \brief Query DRI2 to obtain a DRIdrawable's buffers.
1230 * To determine which DRI buffers to request, examine the renderbuffers
1231 * attached to the drawable's framebuffer. Then request the buffers with
1232 * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
1234 * This is called from intel_update_renderbuffers().
1236 * \param drawable Drawable whose buffers are queried.
1237 * \param buffers [out] List of buffers returned by DRI2 query.
1238 * \param buffer_count [out] Number of buffers returned.
1240 * \see intel_update_renderbuffers()
1241 * \see DRI2GetBuffers()
1242 * \see DRI2GetBuffersWithFormat()
1245 intel_query_dri2_buffers(struct brw_context
*brw
,
1246 __DRIdrawable
*drawable
,
1247 __DRIbuffer
**buffers
,
1250 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1251 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1253 unsigned attachments
[8];
1255 struct intel_renderbuffer
*front_rb
;
1256 struct intel_renderbuffer
*back_rb
;
1258 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1259 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1261 memset(attachments
, 0, sizeof(attachments
));
1262 if ((brw_is_front_buffer_drawing(fb
) ||
1263 brw_is_front_buffer_reading(fb
) ||
1264 !back_rb
) && front_rb
) {
1265 /* If a fake front buffer is in use, then querying for
1266 * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
1267 * the real front buffer to the fake front buffer. So before doing the
1268 * query, we need to make sure all the pending drawing has landed in the
1269 * real front buffer.
1271 intel_batchbuffer_flush(brw
);
1272 intel_flush_front(&brw
->ctx
);
1274 attachments
[i
++] = __DRI_BUFFER_FRONT_LEFT
;
1275 attachments
[i
++] = intel_bits_per_pixel(front_rb
);
1276 } else if (front_rb
&& brw
->front_buffer_dirty
) {
1277 /* We have pending front buffer rendering, but we aren't querying for a
1278 * front buffer. If the front buffer we have is a fake front buffer,
1279 * the X server is going to throw it away when it processes the query.
1280 * So before doing the query, make sure all the pending drawing has
1281 * landed in the real front buffer.
1283 intel_batchbuffer_flush(brw
);
1284 intel_flush_front(&brw
->ctx
);
1288 attachments
[i
++] = __DRI_BUFFER_BACK_LEFT
;
1289 attachments
[i
++] = intel_bits_per_pixel(back_rb
);
1292 assert(i
<= ARRAY_SIZE(attachments
));
1294 *buffers
= screen
->dri2
.loader
->getBuffersWithFormat(drawable
,
1299 drawable
->loaderPrivate
);
1303 * \brief Assign a DRI buffer's DRM region to a renderbuffer.
1305 * This is called from intel_update_renderbuffers().
1308 * DRI buffers whose attachment point is DRI2BufferStencil or
1309 * DRI2BufferDepthStencil are handled as special cases.
1311 * \param buffer_name is a human readable name, such as "dri2 front buffer",
1312 * that is passed to drm_intel_bo_gem_create_from_name().
1314 * \see intel_update_renderbuffers()
1317 intel_process_dri2_buffer(struct brw_context
*brw
,
1318 __DRIdrawable
*drawable
,
1319 __DRIbuffer
*buffer
,
1320 struct intel_renderbuffer
*rb
,
1321 const char *buffer_name
)
1323 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1329 unsigned num_samples
= rb
->Base
.Base
.NumSamples
;
1331 /* We try to avoid closing and reopening the same BO name, because the first
1332 * use of a mapping of the buffer involves a bunch of page faulting which is
1333 * moderately expensive.
1335 struct intel_mipmap_tree
*last_mt
;
1336 if (num_samples
== 0)
1339 last_mt
= rb
->singlesample_mt
;
1341 uint32_t old_name
= 0;
1343 /* The bo already has a name because the miptree was created by a
1344 * previous call to intel_process_dri2_buffer(). If a bo already has a
1345 * name, then drm_intel_bo_flink() is a low-cost getter. It does not
1346 * create a new name.
1348 drm_intel_bo_flink(last_mt
->bo
, &old_name
);
1351 if (old_name
== buffer
->name
)
1354 if (unlikely(INTEL_DEBUG
& DEBUG_DRI
)) {
1356 "attaching buffer %d, at %d, cpp %d, pitch %d\n",
1357 buffer
->name
, buffer
->attachment
,
1358 buffer
->cpp
, buffer
->pitch
);
1361 intel_miptree_release(&rb
->mt
);
1362 bo
= drm_intel_bo_gem_create_from_name(brw
->bufmgr
, buffer_name
,
1366 "Failed to open BO for returned DRI2 buffer "
1367 "(%dx%d, %s, named %d).\n"
1368 "This is likely a bug in the X Server that will lead to a "
1370 drawable
->w
, drawable
->h
, buffer_name
, buffer
->name
);
1374 intel_update_winsys_renderbuffer_miptree(brw
, rb
, bo
,
1375 drawable
->w
, drawable
->h
,
1378 if (brw_is_front_buffer_drawing(fb
) &&
1379 (buffer
->attachment
== __DRI_BUFFER_FRONT_LEFT
||
1380 buffer
->attachment
== __DRI_BUFFER_FAKE_FRONT_LEFT
) &&
1381 rb
->Base
.Base
.NumSamples
> 1) {
1382 intel_renderbuffer_upsample(brw
, rb
);
1387 drm_intel_bo_unreference(bo
);
1391 * \brief Query DRI image loader to obtain a DRIdrawable's buffers.
1393 * To determine which DRI buffers to request, examine the renderbuffers
1394 * attached to the drawable's framebuffer. Then request the buffers from
1397 * This is called from intel_update_renderbuffers().
1399 * \param drawable Drawable whose buffers are queried.
1400 * \param buffers [out] List of buffers returned by DRI2 query.
1401 * \param buffer_count [out] Number of buffers returned.
1403 * \see intel_update_renderbuffers()
1407 intel_update_image_buffer(struct brw_context
*intel
,
1408 __DRIdrawable
*drawable
,
1409 struct intel_renderbuffer
*rb
,
1411 enum __DRIimageBufferMask buffer_type
)
1413 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1415 if (!rb
|| !buffer
->bo
)
1418 unsigned num_samples
= rb
->Base
.Base
.NumSamples
;
1420 /* Check and see if we're already bound to the right
1423 struct intel_mipmap_tree
*last_mt
;
1424 if (num_samples
== 0)
1427 last_mt
= rb
->singlesample_mt
;
1429 if (last_mt
&& last_mt
->bo
== buffer
->bo
)
1432 intel_update_winsys_renderbuffer_miptree(intel
, rb
, buffer
->bo
,
1433 buffer
->width
, buffer
->height
,
1436 if (brw_is_front_buffer_drawing(fb
) &&
1437 buffer_type
== __DRI_IMAGE_BUFFER_FRONT
&&
1438 rb
->Base
.Base
.NumSamples
> 1) {
1439 intel_renderbuffer_upsample(intel
, rb
);
1444 intel_update_image_buffers(struct brw_context
*brw
, __DRIdrawable
*drawable
)
1446 struct gl_framebuffer
*fb
= drawable
->driverPrivate
;
1447 __DRIscreen
*screen
= brw
->intelScreen
->driScrnPriv
;
1448 struct intel_renderbuffer
*front_rb
;
1449 struct intel_renderbuffer
*back_rb
;
1450 struct __DRIimageList images
;
1451 unsigned int format
;
1452 uint32_t buffer_mask
= 0;
1454 front_rb
= intel_get_renderbuffer(fb
, BUFFER_FRONT_LEFT
);
1455 back_rb
= intel_get_renderbuffer(fb
, BUFFER_BACK_LEFT
);
1458 format
= intel_rb_format(back_rb
);
1460 format
= intel_rb_format(front_rb
);
1464 if (front_rb
&& (brw_is_front_buffer_drawing(fb
) ||
1465 brw_is_front_buffer_reading(fb
) || !back_rb
)) {
1466 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1470 buffer_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1472 (*screen
->image
.loader
->getBuffers
) (drawable
,
1473 driGLFormatToImageFormat(format
),
1474 &drawable
->dri2
.stamp
,
1475 drawable
->loaderPrivate
,
1479 if (images
.image_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1480 drawable
->w
= images
.front
->width
;
1481 drawable
->h
= images
.front
->height
;
1482 intel_update_image_buffer(brw
,
1486 __DRI_IMAGE_BUFFER_FRONT
);
1488 if (images
.image_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1489 drawable
->w
= images
.back
->width
;
1490 drawable
->h
= images
.back
->height
;
1491 intel_update_image_buffer(brw
,
1495 __DRI_IMAGE_BUFFER_BACK
);