2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
28 * Mesa context/visual/framebuffer management functions.
33 * \mainpage Mesa Main Module
35 * \section MainIntroduction Introduction
37 * The Mesa Main module consists of all the files in the main/ directory.
38 * Among the features of this module are:
40 * <LI> Structures to represent most GL state </LI>
41 * <LI> State set/get functions </LI>
42 * <LI> Display lists </LI>
43 * <LI> Texture unit, object and image handling </LI>
44 * <LI> Matrix and attribute stacks </LI>
47 * Other modules are responsible for API dispatch, vertex transformation,
48 * point/line/triangle setup, rasterization, vertex array caching,
49 * vertex/fragment programs/shaders, etc.
52 * \section AboutDoxygen About Doxygen
54 * If you're viewing this information as Doxygen-generated HTML you'll
55 * see the documentation index at the top of this page.
57 * The first line lists the Mesa source code modules.
58 * The second line lists the indexes available for viewing the documentation
61 * Selecting the <b>Main page</b> link will display a summary of the module
64 * Selecting <b>Data Structures</b> will list all C structures.
66 * Selecting the <b>File List</b> link will list all the source files in
68 * Selecting a filename will show a list of all functions defined in that file.
70 * Selecting the <b>Data Fields</b> link will display a list of all
71 * documented structure members.
73 * Selecting the <b>Globals</b> link will display a list
74 * of all functions, structures, global variables and macros in the module.
83 #include "api_loopback.h"
89 #include "bufferobj.h"
93 #include "debug_output.h"
97 #include "extensions.h"
102 #include "framebuffer.h"
103 #include "glthread.h"
110 #include "multisample.h"
111 #include "performance_monitor.h"
112 #include "performance_query.h"
113 #include "pipelineobj.h"
115 #include "pixelstore.h"
118 #include "queryobj.h"
124 #include "shaderobj.h"
125 #include "shaderimage.h"
126 #include "util/debug.h"
127 #include "util/disk_cache.h"
128 #include "util/strtod.h"
130 #include "texcompress_s3tc.h"
131 #include "texstate.h"
132 #include "transformfeedback.h"
136 #include "viewport.h"
137 #include "texturebindless.h"
138 #include "program/program.h"
139 #include "math/m_matrix.h"
140 #include "main/dispatch.h" /* for _gloffset_COUNT */
142 #include "git_sha1.h"
145 #include "sparc/sparc.h"
148 #include "compiler/glsl_types.h"
149 #include "compiler/glsl/glsl_parser_extras.h"
154 int MESA_VERBOSE
= 0;
157 #ifndef MESA_DEBUG_FLAGS
158 int MESA_DEBUG_FLAGS
= 0;
162 /* ubyte -> float conversion */
163 GLfloat _mesa_ubyte_to_float_color_tab
[256];
168 * Swap buffers notification callback.
170 * \param ctx GL context.
172 * Called by window system just before swapping buffers.
173 * We have to finish any pending rendering.
176 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
178 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
179 _mesa_debug(ctx
, "SwapBuffers\n");
180 FLUSH_CURRENT( ctx
, 0 );
181 if (ctx
->Driver
.Flush
) {
182 ctx
->Driver
.Flush(ctx
);
187 /**********************************************************************/
188 /** \name GL Visual allocation/destruction */
189 /**********************************************************************/
193 * Allocates a struct gl_config structure and initializes it via
194 * _mesa_initialize_visual().
196 * \param dbFlag double buffering
197 * \param stereoFlag stereo buffer
198 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
199 * is acceptable but the actual depth type will be GLushort or GLuint as
201 * \param stencilBits requested minimum bits per stencil buffer value
202 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
203 * of bits per color component in accum buffer.
204 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
205 * \param redBits number of bits per color component in frame buffer for RGB(A)
206 * mode. We always use 8 in core Mesa though.
207 * \param greenBits same as above.
208 * \param blueBits same as above.
209 * \param alphaBits same as above.
210 * \param numSamples not really used.
212 * \return pointer to new struct gl_config or NULL if requested parameters
215 * \note Need to add params for level and numAuxBuffers (at least)
218 _mesa_create_visual( GLboolean dbFlag
,
219 GLboolean stereoFlag
,
227 GLint accumGreenBits
,
229 GLint accumAlphaBits
,
232 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
234 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
235 redBits
, greenBits
, blueBits
, alphaBits
,
236 depthBits
, stencilBits
,
237 accumRedBits
, accumGreenBits
,
238 accumBlueBits
, accumAlphaBits
,
249 * Makes some sanity checks and fills in the fields of the struct
250 * gl_config object with the given parameters. If the caller needs to
251 * set additional fields, he should just probably init the whole
252 * gl_config object himself.
254 * \return GL_TRUE on success, or GL_FALSE on failure.
256 * \sa _mesa_create_visual() above for the parameter description.
259 _mesa_initialize_visual( struct gl_config
*vis
,
261 GLboolean stereoFlag
,
269 GLint accumGreenBits
,
271 GLint accumAlphaBits
,
276 if (depthBits
< 0 || depthBits
> 32) {
279 if (stencilBits
< 0 || stencilBits
> 8) {
282 assert(accumRedBits
>= 0);
283 assert(accumGreenBits
>= 0);
284 assert(accumBlueBits
>= 0);
285 assert(accumAlphaBits
>= 0);
287 vis
->rgbMode
= GL_TRUE
;
288 vis
->doubleBufferMode
= dbFlag
;
289 vis
->stereoMode
= stereoFlag
;
291 vis
->redBits
= redBits
;
292 vis
->greenBits
= greenBits
;
293 vis
->blueBits
= blueBits
;
294 vis
->alphaBits
= alphaBits
;
295 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
298 vis
->depthBits
= depthBits
;
299 vis
->stencilBits
= stencilBits
;
301 vis
->accumRedBits
= accumRedBits
;
302 vis
->accumGreenBits
= accumGreenBits
;
303 vis
->accumBlueBits
= accumBlueBits
;
304 vis
->accumAlphaBits
= accumAlphaBits
;
306 vis
->haveAccumBuffer
= accumRedBits
> 0;
307 vis
->haveDepthBuffer
= depthBits
> 0;
308 vis
->haveStencilBuffer
= stencilBits
> 0;
310 vis
->numAuxBuffers
= 0;
312 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
313 vis
->samples
= numSamples
;
320 * Destroy a visual and free its memory.
324 * Frees the visual structure.
327 _mesa_destroy_visual( struct gl_config
*vis
)
335 /**********************************************************************/
336 /** \name Context allocation, initialization, destroying
338 * The purpose of the most initialization functions here is to provide the
339 * default state values according to the OpenGL specification.
341 /**********************************************************************/
346 * One-time initialization mutex lock.
348 * \sa Used by one_time_init().
350 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
354 * Calls all the various one-time-fini functions in Mesa
360 _mesa_destroy_shader_compiler();
365 * Calls all the various one-time-init functions in Mesa.
367 * While holding a global mutex lock, calls several initialization functions,
368 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
374 one_time_init( struct gl_context
*ctx
)
376 static GLbitfield api_init_mask
= 0x0;
378 mtx_lock(&OneTimeLock
);
380 /* truly one-time init */
381 if (!api_init_mask
) {
384 STATIC_ASSERT(sizeof(GLbyte
) == 1);
385 STATIC_ASSERT(sizeof(GLubyte
) == 1);
386 STATIC_ASSERT(sizeof(GLshort
) == 2);
387 STATIC_ASSERT(sizeof(GLushort
) == 2);
388 STATIC_ASSERT(sizeof(GLint
) == 4);
389 STATIC_ASSERT(sizeof(GLuint
) == 4);
393 _mesa_one_time_init_extension_overrides();
395 _mesa_get_cpu_features();
397 for (i
= 0; i
< 256; i
++) {
398 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
401 atexit(one_time_fini
);
404 if (MESA_VERBOSE
!= 0) {
405 _mesa_debug(ctx
, "Mesa " PACKAGE_VERSION
" DEBUG build"
407 " (" MESA_GIT_SHA1
")"
414 /* per-API one-time init */
415 if (!(api_init_mask
& (1 << ctx
->API
))) {
416 _mesa_init_remap_table();
419 api_init_mask
|= 1 << ctx
->API
;
421 mtx_unlock(&OneTimeLock
);
426 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
429 _mesa_init_current(struct gl_context
*ctx
)
433 /* Init all to (0,0,0,1) */
434 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
435 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
438 /* redo special cases: */
439 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
440 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
441 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
442 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
443 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
444 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
449 * Init vertex/fragment/geometry program limits.
450 * Important: drivers should override these with actual limits.
453 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
454 struct gl_program_constants
*prog
)
456 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
457 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
458 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
459 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
460 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
461 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
462 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
463 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
466 case MESA_SHADER_VERTEX
:
467 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
468 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
469 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
470 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
471 prog
->MaxInputComponents
= 0; /* value not used */
472 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
474 case MESA_SHADER_FRAGMENT
:
475 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
476 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
477 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
478 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
479 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
480 prog
->MaxOutputComponents
= 0; /* value not used */
482 case MESA_SHADER_TESS_CTRL
:
483 case MESA_SHADER_TESS_EVAL
:
484 case MESA_SHADER_GEOMETRY
:
485 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
486 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
487 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
488 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
489 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
490 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
492 case MESA_SHADER_COMPUTE
:
493 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
494 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
495 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
496 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
497 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
498 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
501 assert(0 && "Bad shader stage in init_program_limits()");
504 /* Set the native limits to zero. This implies that there is no native
505 * support for shaders. Let the drivers fill in the actual values.
507 prog
->MaxNativeInstructions
= 0;
508 prog
->MaxNativeAluInstructions
= 0;
509 prog
->MaxNativeTexInstructions
= 0;
510 prog
->MaxNativeTexIndirections
= 0;
511 prog
->MaxNativeAttribs
= 0;
512 prog
->MaxNativeTemps
= 0;
513 prog
->MaxNativeAddressRegs
= 0;
514 prog
->MaxNativeParameters
= 0;
516 /* Set GLSL datatype range/precision info assuming IEEE float values.
517 * Drivers should override these defaults as needed.
519 prog
->MediumFloat
.RangeMin
= 127;
520 prog
->MediumFloat
.RangeMax
= 127;
521 prog
->MediumFloat
.Precision
= 23;
522 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
524 /* Assume ints are stored as floats for now, since this is the least-common
525 * denominator. The OpenGL ES spec implies (page 132) that the precision
526 * of integer types should be 0. Practically speaking, IEEE
527 * single-precision floating point values can only store integers in the
528 * range [-0x01000000, 0x01000000] without loss of precision.
530 prog
->MediumInt
.RangeMin
= 24;
531 prog
->MediumInt
.RangeMax
= 24;
532 prog
->MediumInt
.Precision
= 0;
533 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
535 prog
->MaxUniformBlocks
= 12;
536 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
537 consts
->MaxUniformBlockSize
/ 4 *
538 prog
->MaxUniformBlocks
);
540 prog
->MaxAtomicBuffers
= 0;
541 prog
->MaxAtomicCounters
= 0;
543 prog
->MaxShaderStorageBlocks
= 8;
548 * Initialize fields of gl_constants (aka ctx->Const.*).
549 * Use defaults from config.h. The device drivers will often override
550 * some of these values (such as number of texture units).
553 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
558 /* Constants, may be overriden (usually only reduced) by device drivers */
559 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
560 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
561 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
562 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
563 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
564 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
565 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
566 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
567 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
568 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
569 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
570 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
571 consts
->MaxTextureBufferSize
= 65536;
572 consts
->TextureBufferOffsetAlignment
= 1;
573 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
574 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
575 consts
->MinPointSize
= MIN_POINT_SIZE
;
576 consts
->MaxPointSize
= MAX_POINT_SIZE
;
577 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
578 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
579 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
580 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
581 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
582 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
583 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
584 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
585 consts
->MaxClipPlanes
= 6;
586 consts
->MaxLights
= MAX_LIGHTS
;
587 consts
->MaxShininess
= 128.0;
588 consts
->MaxSpotExponent
= 128.0;
589 consts
->MaxViewportWidth
= 16384;
590 consts
->MaxViewportHeight
= 16384;
591 consts
->MinMapBufferAlignment
= 64;
593 /* Driver must override these values if ARB_viewport_array is supported. */
594 consts
->MaxViewports
= 1;
595 consts
->ViewportSubpixelBits
= 0;
596 consts
->ViewportBounds
.Min
= 0;
597 consts
->ViewportBounds
.Max
= 0;
599 /** GL_ARB_uniform_buffer_object */
600 consts
->MaxCombinedUniformBlocks
= 36;
601 consts
->MaxUniformBufferBindings
= 36;
602 consts
->MaxUniformBlockSize
= 16384;
603 consts
->UniformBufferOffsetAlignment
= 1;
605 /** GL_ARB_shader_storage_buffer_object */
606 consts
->MaxCombinedShaderStorageBlocks
= 8;
607 consts
->MaxShaderStorageBufferBindings
= 8;
608 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
609 consts
->ShaderStorageBufferOffsetAlignment
= 256;
611 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
612 consts
->MaxUserAssignableUniformLocations
=
613 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
615 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
616 init_program_limits(consts
, i
, &consts
->Program
[i
]);
618 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
619 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
621 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
622 * gl_VertexID is implemented using a native hardware register with OpenGL
625 consts
->VertexID_is_zero_based
= false;
627 /* GL_ARB_draw_buffers */
628 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
630 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
631 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
633 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
634 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
635 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
636 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
637 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
638 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
640 /* Shading language version */
641 consts
->GLSLVersion
= 120;
642 _mesa_override_glsl_version(consts
);
645 consts
->GenerateTemporaryNames
= true;
647 consts
->GenerateTemporaryNames
= false;
650 /* GL_ARB_framebuffer_object */
651 consts
->MaxSamples
= 0;
653 /* GLSL default if NativeIntegers == FALSE */
654 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
657 consts
->MaxServerWaitTimeout
= 0x7fffffff7fffffffULL
;
659 /* GL_EXT_provoking_vertex */
660 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
662 /** GL_ARB_viewport_array */
663 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
665 /* GL_EXT_transform_feedback */
666 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
667 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
668 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
669 consts
->MaxVertexStreams
= 1;
672 consts
->ProfileMask
= api
== API_OPENGL_CORE
673 ? GL_CONTEXT_CORE_PROFILE_BIT
674 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
677 consts
->MaxVertexAttribStride
= 2048;
679 /** GL_EXT_gpu_shader4 */
680 consts
->MinProgramTexelOffset
= -8;
681 consts
->MaxProgramTexelOffset
= 7;
683 /* GL_ARB_texture_gather */
684 consts
->MinProgramTextureGatherOffset
= -8;
685 consts
->MaxProgramTextureGatherOffset
= 7;
687 /* GL_ARB_robustness */
688 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
690 /* GL_KHR_robustness */
691 consts
->RobustAccess
= GL_FALSE
;
693 /* ES 3.0 or ARB_ES3_compatibility */
694 consts
->MaxElementIndex
= 0xffffffffu
;
696 /* GL_ARB_texture_multisample */
697 consts
->MaxColorTextureSamples
= 1;
698 consts
->MaxDepthTextureSamples
= 1;
699 consts
->MaxIntegerSamples
= 1;
701 /* GL_ARB_shader_atomic_counters */
702 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
703 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
704 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
705 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
707 /* GL_ARB_vertex_attrib_binding */
708 consts
->MaxVertexAttribRelativeOffset
= 2047;
709 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
711 /* GL_ARB_compute_shader */
712 consts
->MaxComputeWorkGroupCount
[0] = 65535;
713 consts
->MaxComputeWorkGroupCount
[1] = 65535;
714 consts
->MaxComputeWorkGroupCount
[2] = 65535;
715 consts
->MaxComputeWorkGroupSize
[0] = 1024;
716 consts
->MaxComputeWorkGroupSize
[1] = 1024;
717 consts
->MaxComputeWorkGroupSize
[2] = 64;
718 /* Enables compute support for GLES 3.1 if >= 128 */
719 consts
->MaxComputeWorkGroupInvocations
= 0;
721 /** GL_ARB_gpu_shader5 */
722 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
723 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
725 /** GL_KHR_context_flush_control */
726 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
728 /** GL_ARB_tessellation_shader */
729 consts
->MaxTessGenLevel
= MAX_TESS_GEN_LEVEL
;
730 consts
->MaxPatchVertices
= MAX_PATCH_VERTICES
;
731 consts
->Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
732 consts
->Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
733 consts
->MaxTessPatchComponents
= MAX_TESS_PATCH_COMPONENTS
;
734 consts
->MaxTessControlTotalOutputComponents
= MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS
;
735 consts
->PrimitiveRestartForPatches
= false;
737 /** GL_ARB_compute_variable_group_size */
738 consts
->MaxComputeVariableGroupSize
[0] = 512;
739 consts
->MaxComputeVariableGroupSize
[1] = 512;
740 consts
->MaxComputeVariableGroupSize
[2] = 64;
741 consts
->MaxComputeVariableGroupInvocations
= 512;
746 * Do some sanity checks on the limits/constants for the given context.
747 * Only called the first time a context is bound.
750 check_context_limits(struct gl_context
*ctx
)
754 /* check that we don't exceed the size of various bitfields */
755 assert(VARYING_SLOT_MAX
<=
756 (8 * sizeof(ctx
->VertexProgram
._Current
->info
.outputs_written
)));
757 assert(VARYING_SLOT_MAX
<=
758 (8 * sizeof(ctx
->FragmentProgram
._Current
->info
.inputs_read
)));
760 /* shader-related checks */
761 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
762 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
764 /* Texture unit checks */
765 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
766 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
767 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
768 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
769 assert(ctx
->Const
.MaxTextureUnits
> 0);
770 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
771 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
772 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
773 ctx
->Const
.MaxTextureCoordUnits
));
774 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
775 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
776 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
777 /* number of coord units cannot be greater than number of image units */
778 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
781 /* Texture size checks */
782 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
783 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
784 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
785 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
787 /* Texture level checks */
788 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
789 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
791 /* Max texture size should be <= max viewport size (render to texture) */
792 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
793 <= ctx
->Const
.MaxViewportWidth
);
794 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
795 <= ctx
->Const
.MaxViewportHeight
);
797 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
799 /* if this fails, add more enum values to gl_buffer_index */
800 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
802 /* XXX probably add more tests */
807 * Initialize the attribute groups in a GL context.
809 * \param ctx GL context.
811 * Initializes all the attributes, calling the respective <tt>init*</tt>
812 * functions for the more complex data structures.
815 init_attrib_groups(struct gl_context
*ctx
)
820 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
823 _mesa_init_extensions(&ctx
->Extensions
);
825 /* Attribute Groups */
826 _mesa_init_accum( ctx
);
827 _mesa_init_attrib( ctx
);
828 _mesa_init_bbox( ctx
);
829 _mesa_init_buffer_objects( ctx
);
830 _mesa_init_color( ctx
);
831 _mesa_init_current( ctx
);
832 _mesa_init_depth( ctx
);
833 _mesa_init_debug( ctx
);
834 _mesa_init_debug_output( ctx
);
835 _mesa_init_display_list( ctx
);
836 _mesa_init_eval( ctx
);
837 _mesa_init_fbobjects( ctx
);
838 _mesa_init_feedback( ctx
);
839 _mesa_init_fog( ctx
);
840 _mesa_init_hint( ctx
);
841 _mesa_init_image_units( ctx
);
842 _mesa_init_line( ctx
);
843 _mesa_init_lighting( ctx
);
844 _mesa_init_matrix( ctx
);
845 _mesa_init_multisample( ctx
);
846 _mesa_init_performance_monitors( ctx
);
847 _mesa_init_performance_queries( ctx
);
848 _mesa_init_pipeline( ctx
);
849 _mesa_init_pixel( ctx
);
850 _mesa_init_pixelstore( ctx
);
851 _mesa_init_point( ctx
);
852 _mesa_init_polygon( ctx
);
853 _mesa_init_program( ctx
);
854 _mesa_init_queryobj( ctx
);
855 _mesa_init_sync( ctx
);
856 _mesa_init_rastpos( ctx
);
857 _mesa_init_scissor( ctx
);
858 _mesa_init_shader_state( ctx
);
859 _mesa_init_stencil( ctx
);
860 _mesa_init_transform( ctx
);
861 _mesa_init_transform_feedback( ctx
);
862 _mesa_init_varray( ctx
);
863 _mesa_init_viewport( ctx
);
864 _mesa_init_resident_handles( ctx
);
866 if (!_mesa_init_texture( ctx
))
870 ctx
->TileRasterOrderIncreasingX
= GL_TRUE
;
871 ctx
->TileRasterOrderIncreasingY
= GL_TRUE
;
872 ctx
->NewState
= _NEW_ALL
;
873 ctx
->NewDriverState
= ~0;
874 ctx
->ErrorValue
= GL_NO_ERROR
;
875 ctx
->ShareGroupReset
= false;
876 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
883 * Update default objects in a GL context with respect to shared state.
885 * \param ctx GL context.
887 * Removes references to old default objects, (texture objects, program
888 * objects, etc.) and changes to reference those from the current shared
892 update_default_objects(struct gl_context
*ctx
)
896 _mesa_update_default_objects_program(ctx
);
897 _mesa_update_default_objects_texture(ctx
);
898 _mesa_update_default_objects_buffer_objects(ctx
);
904 /* XXX this is temporary and should be removed at some point in the
905 * future when there's a reasonable expectation that the libGL library
906 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
907 * functions which were added in Mesa 10.6.
910 /* Avoid libGL / driver ABI break */
911 #define USE_GLAPI_NOP_FEATURES 0
913 #define USE_GLAPI_NOP_FEATURES 1
918 * This function is called by the glapi no-op functions. For each OpenGL
919 * function/entrypoint there's a simple no-op function. These "no-op"
920 * functions call this function.
922 * If there's a current OpenGL context for the calling thread, we record a
923 * GL_INVALID_OPERATION error. This can happen either because the app's
924 * calling an unsupported extension function, or calling an illegal function
925 * (such as glClear between glBegin/glEnd).
927 * If there's no current OpenGL context for the calling thread, we can
928 * print a message to stderr.
930 * \param name the name of the OpenGL function
932 #if USE_GLAPI_NOP_FEATURES
934 nop_handler(const char *name
)
936 GET_CURRENT_CONTEXT(ctx
);
938 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
941 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
943 "GL User Error: gl%s called without a rendering context\n",
953 * Special no-op glFlush, see below.
956 static void GLAPIENTRY
959 /* don't record an error like we do in nop_handler() */
964 #if !USE_GLAPI_NOP_FEATURES
968 GET_CURRENT_CONTEXT(ctx
);
969 _mesa_error(ctx
, GL_INVALID_OPERATION
,
970 "unsupported function called "
971 "(unsupported extension or deprecated function?)");
978 * Create a new API dispatch table in which all entries point to the
979 * generic_nop() function. This will not work on Windows because of
980 * the __stdcall convention which requires the callee to clean up the
981 * call stack. That's impossible with one generic no-op function.
983 struct _glapi_table
*
984 _mesa_new_nop_table(unsigned numEntries
)
986 struct _glapi_table
*table
;
988 #if !USE_GLAPI_NOP_FEATURES
989 table
= malloc(numEntries
* sizeof(_glapi_proc
));
991 _glapi_proc
*entry
= (_glapi_proc
*) table
;
993 for (i
= 0; i
< numEntries
; i
++) {
994 entry
[i
] = (_glapi_proc
) generic_nop
;
998 table
= _glapi_new_nop_table(numEntries
);
1005 * Allocate and initialize a new dispatch table. The table will be
1006 * populated with pointers to "no-op" functions. In turn, the no-op
1007 * functions will call nop_handler() above.
1009 struct _glapi_table
*
1010 _mesa_alloc_dispatch_table(void)
1012 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1013 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1014 * Mesa we do this to accommodate different versions of libGL and various
1017 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1019 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1023 /* This is a special case for Windows in the event that
1024 * wglGetProcAddress is called between glBegin/End().
1026 * The MS opengl32.dll library apparently calls glFlush from
1027 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1028 * will dispatch to _mesa_generic_nop() and we'll generate a
1029 * GL_INVALID_OPERATION error.
1031 * The specific case which hits this is piglit's primitive-restart
1032 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1033 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1034 * code will try to resolve the function by calling wglGetProcAddress.
1035 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1036 * will fail causing the test to fail. By suppressing the error, the
1037 * assertion passes and the test continues.
1039 SET_Flush(table
, nop_glFlush
);
1043 #if USE_GLAPI_NOP_FEATURES
1044 _glapi_set_nop_handler(nop_handler
);
1051 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1053 * This ensures that we generate GL_INVALID_OPERATION errors from most
1054 * functions, since the set of functions that are valid within Begin/End is
1057 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1060 * "The only GL commands that are allowed within any Begin/End pairs are
1061 * the commands for specifying vertex coordinates, vertex color, normal
1062 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1063 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1064 * commands for specifying lighting material parameters (Material
1065 * commands see section 2.12.2), display list invocation commands
1066 * (CallList and CallLists see section 5.4), and the EdgeFlag
1067 * command. Executing Begin after Begin has already been executed but
1068 * before an End is issued generates the INVALID OPERATION error, as does
1069 * executing End without a previous corresponding Begin. Executing any
1070 * other GL command within Begin/End results in the error INVALID
1073 * The table entries for specifying vertex attributes are set up by
1074 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1075 * are set by install_vtxfmt() as well.
1077 static struct _glapi_table
*
1078 create_beginend_table(const struct gl_context
*ctx
)
1080 struct _glapi_table
*table
;
1082 table
= _mesa_alloc_dispatch_table();
1086 /* Fill in functions which return a value, since they should return some
1087 * specific value even if they emit a GL_INVALID_OPERATION error from them
1088 * being called within glBegin()/glEnd().
1090 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1092 COPY_DISPATCH(GenLists
);
1093 COPY_DISPATCH(IsProgram
);
1094 COPY_DISPATCH(IsVertexArray
);
1095 COPY_DISPATCH(IsBuffer
);
1096 COPY_DISPATCH(IsEnabled
);
1097 COPY_DISPATCH(IsEnabledi
);
1098 COPY_DISPATCH(IsRenderbuffer
);
1099 COPY_DISPATCH(IsFramebuffer
);
1100 COPY_DISPATCH(CheckFramebufferStatus
);
1101 COPY_DISPATCH(RenderMode
);
1102 COPY_DISPATCH(GetString
);
1103 COPY_DISPATCH(GetStringi
);
1104 COPY_DISPATCH(GetPointerv
);
1105 COPY_DISPATCH(IsQuery
);
1106 COPY_DISPATCH(IsSampler
);
1107 COPY_DISPATCH(IsSync
);
1108 COPY_DISPATCH(IsTexture
);
1109 COPY_DISPATCH(IsTransformFeedback
);
1110 COPY_DISPATCH(DeleteQueries
);
1111 COPY_DISPATCH(AreTexturesResident
);
1112 COPY_DISPATCH(FenceSync
);
1113 COPY_DISPATCH(ClientWaitSync
);
1114 COPY_DISPATCH(MapBuffer
);
1115 COPY_DISPATCH(UnmapBuffer
);
1116 COPY_DISPATCH(MapBufferRange
);
1117 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1118 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1120 _mesa_loopback_init_api_table(ctx
, table
);
1126 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1128 /* Do the code-generated setup of the exec table in api_exec.c. */
1129 _mesa_initialize_exec_table(ctx
);
1132 _mesa_initialize_save_table(ctx
);
1136 * Initialize a struct gl_context struct (rendering context).
1138 * This includes allocating all the other structs and arrays which hang off of
1139 * the context by pointers.
1140 * Note that the driver needs to pass in its dd_function_table here since
1141 * we need to at least call driverFunctions->NewTextureObject to create the
1142 * default texture objects.
1144 * Called by _mesa_create_context().
1146 * Performs the imports and exports callback tables initialization, and
1147 * miscellaneous one-time initializations. If no shared context is supplied one
1148 * is allocated, and increase its reference count. Setups the GL API dispatch
1149 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1150 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1153 * \param ctx the context to initialize
1154 * \param api the GL API type to create the context for
1155 * \param visual describes the visual attributes for this context or NULL to
1156 * create a configless context
1157 * \param share_list points to context to share textures, display lists,
1159 * \param driverFunctions table of device driver functions for this context
1163 _mesa_initialize_context(struct gl_context
*ctx
,
1165 const struct gl_config
*visual
,
1166 struct gl_context
*share_list
,
1167 const struct dd_function_table
*driverFunctions
)
1169 struct gl_shared_state
*shared
;
1172 assert(driverFunctions
->NewTextureObject
);
1173 assert(driverFunctions
->FreeTextureImageBuffer
);
1176 ctx
->DrawBuffer
= NULL
;
1177 ctx
->ReadBuffer
= NULL
;
1178 ctx
->WinSysDrawBuffer
= NULL
;
1179 ctx
->WinSysReadBuffer
= NULL
;
1182 ctx
->Visual
= *visual
;
1183 ctx
->HasConfig
= GL_TRUE
;
1186 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1187 ctx
->HasConfig
= GL_FALSE
;
1190 _mesa_override_gl_version(ctx
);
1192 /* misc one-time initializations */
1195 /* Plug in driver functions and context pointer here.
1196 * This is important because when we call alloc_shared_state() below
1197 * we'll call ctx->Driver.NewTextureObject() to create the default
1200 ctx
->Driver
= *driverFunctions
;
1203 /* share state with another context */
1204 shared
= share_list
->Shared
;
1207 /* allocate new, unshared state */
1208 shared
= _mesa_alloc_shared_state(ctx
);
1213 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1215 if (!init_attrib_groups( ctx
))
1218 /* KHR_no_error is likely to crash, overflow memory, etc if an application
1219 * has errors so don't enable it for setuid processes.
1221 if (env_var_as_boolean("MESA_NO_ERROR", false)) {
1222 #if !defined(_WIN32)
1223 if (geteuid() == getuid())
1225 ctx
->Const
.ContextFlags
|= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR
;
1228 /* setup the API dispatch tables with all nop functions */
1229 ctx
->OutsideBeginEnd
= _mesa_alloc_dispatch_table();
1230 if (!ctx
->OutsideBeginEnd
)
1232 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1233 ctx
->CurrentClientDispatch
= ctx
->CurrentServerDispatch
= ctx
->OutsideBeginEnd
;
1235 ctx
->FragmentProgram
._MaintainTexEnvProgram
1236 = (getenv("MESA_TEX_PROG") != NULL
);
1238 ctx
->VertexProgram
._MaintainTnlProgram
1239 = (getenv("MESA_TNL_PROG") != NULL
);
1240 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1241 /* this is required... */
1242 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1245 /* Mesa core handles all the formats that mesa core knows about.
1246 * Drivers will want to override this list with just the formats
1247 * they can handle, and confirm that appropriate fallbacks exist in
1248 * _mesa_choose_tex_format().
1250 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1251 sizeof(ctx
->TextureFormatSupported
));
1254 case API_OPENGL_COMPAT
:
1255 ctx
->BeginEnd
= create_beginend_table(ctx
);
1256 ctx
->Save
= _mesa_alloc_dispatch_table();
1257 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1261 case API_OPENGL_CORE
:
1265 * GL_OES_texture_cube_map says
1266 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1268 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1269 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1270 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1271 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1272 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1273 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1274 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1275 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1279 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1280 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1284 ctx
->FirstTimeCurrent
= GL_TRUE
;
1289 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1290 free(ctx
->BeginEnd
);
1291 free(ctx
->OutsideBeginEnd
);
1298 * Free the data associated with the given context.
1300 * But doesn't free the struct gl_context struct itself.
1302 * \sa _mesa_initialize_context() and init_attrib_groups().
1305 _mesa_free_context_data( struct gl_context
*ctx
)
1307 if (!_mesa_get_current_context()){
1308 /* No current context, but we may need one in order to delete
1309 * texture objs, etc. So temporarily bind the context now.
1311 _mesa_make_current(ctx
, NULL
, NULL
);
1314 /* unreference WinSysDraw/Read buffers */
1315 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1316 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1317 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1318 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1320 _mesa_reference_program(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1321 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1322 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1324 _mesa_reference_program(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1325 _mesa_reference_program(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1326 _mesa_reference_program(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1328 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1329 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1330 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1332 _mesa_reference_program(ctx
, &ctx
->ComputeProgram
._Current
, NULL
);
1334 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1335 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1337 _mesa_free_attrib_data(ctx
);
1338 _mesa_free_buffer_objects(ctx
);
1339 _mesa_free_eval_data( ctx
);
1340 _mesa_free_texture_data( ctx
);
1341 _mesa_free_matrix_data( ctx
);
1342 _mesa_free_pipeline_data(ctx
);
1343 _mesa_free_program_data(ctx
);
1344 _mesa_free_shader_state(ctx
);
1345 _mesa_free_queryobj_data(ctx
);
1346 _mesa_free_sync_data(ctx
);
1347 _mesa_free_varray_data(ctx
);
1348 _mesa_free_transform_feedback(ctx
);
1349 _mesa_free_performance_monitors(ctx
);
1350 _mesa_free_performance_queries(ctx
);
1351 _mesa_free_resident_handles(ctx
);
1353 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1354 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1355 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1356 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1358 /* free dispatch tables */
1359 free(ctx
->BeginEnd
);
1360 free(ctx
->OutsideBeginEnd
);
1362 free(ctx
->ContextLost
);
1363 free(ctx
->MarshalExec
);
1365 /* Shared context state (display lists, textures, etc) */
1366 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1368 /* needs to be after freeing shared state */
1369 _mesa_free_display_list_data(ctx
);
1371 _mesa_free_errors_data(ctx
);
1373 free((void *)ctx
->Extensions
.String
);
1375 free(ctx
->VersionString
);
1377 /* unbind the context if it's currently bound */
1378 if (ctx
== _mesa_get_current_context()) {
1379 _mesa_make_current(NULL
, NULL
, NULL
);
1385 * Destroy a struct gl_context structure.
1387 * \param ctx GL context.
1389 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1392 _mesa_destroy_context( struct gl_context
*ctx
)
1395 _mesa_free_context_data(ctx
);
1396 free( (void *) ctx
);
1402 * Copy attribute groups from one context to another.
1404 * \param src source context
1405 * \param dst destination context
1406 * \param mask bitwise OR of GL_*_BIT flags
1408 * According to the bits specified in \p mask, copies the corresponding
1409 * attributes from \p src into \p dst. For many of the attributes a simple \c
1410 * memcpy is not enough due to the existence of internal pointers in their data
1414 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1417 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1419 dst
->Accum
= src
->Accum
;
1421 if (mask
& GL_COLOR_BUFFER_BIT
) {
1423 dst
->Color
= src
->Color
;
1425 if (mask
& GL_CURRENT_BIT
) {
1427 dst
->Current
= src
->Current
;
1429 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1431 dst
->Depth
= src
->Depth
;
1433 if (mask
& GL_ENABLE_BIT
) {
1436 if (mask
& GL_EVAL_BIT
) {
1438 dst
->Eval
= src
->Eval
;
1440 if (mask
& GL_FOG_BIT
) {
1442 dst
->Fog
= src
->Fog
;
1444 if (mask
& GL_HINT_BIT
) {
1446 dst
->Hint
= src
->Hint
;
1448 if (mask
& GL_LIGHTING_BIT
) {
1450 dst
->Light
= src
->Light
;
1452 if (mask
& GL_LINE_BIT
) {
1454 dst
->Line
= src
->Line
;
1456 if (mask
& GL_LIST_BIT
) {
1458 dst
->List
= src
->List
;
1460 if (mask
& GL_PIXEL_MODE_BIT
) {
1462 dst
->Pixel
= src
->Pixel
;
1464 if (mask
& GL_POINT_BIT
) {
1466 dst
->Point
= src
->Point
;
1468 if (mask
& GL_POLYGON_BIT
) {
1470 dst
->Polygon
= src
->Polygon
;
1472 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1473 /* Use loop instead of memcpy due to problem with Portland Group's
1474 * C compiler. Reported by John Stone.
1477 for (i
= 0; i
< 32; i
++) {
1478 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1481 if (mask
& GL_SCISSOR_BIT
) {
1483 dst
->Scissor
= src
->Scissor
;
1485 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1487 dst
->Stencil
= src
->Stencil
;
1489 if (mask
& GL_TEXTURE_BIT
) {
1490 /* Cannot memcpy because of pointers */
1491 _mesa_copy_texture_state(src
, dst
);
1493 if (mask
& GL_TRANSFORM_BIT
) {
1495 dst
->Transform
= src
->Transform
;
1497 if (mask
& GL_VIEWPORT_BIT
) {
1499 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1501 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1505 /* XXX FIXME: Call callbacks?
1507 dst
->NewState
= _NEW_ALL
;
1508 dst
->NewDriverState
= ~0;
1513 * Check if the given context can render into the given framebuffer
1514 * by checking visual attributes.
1516 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1519 check_compatible(const struct gl_context
*ctx
,
1520 const struct gl_framebuffer
*buffer
)
1522 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1523 const struct gl_config
*bufvis
= &buffer
->Visual
;
1525 if (buffer
== _mesa_get_incomplete_framebuffer())
1528 #define check_component(foo) \
1529 if (ctxvis->foo && bufvis->foo && \
1530 ctxvis->foo != bufvis->foo) \
1533 check_component(redMask
);
1534 check_component(greenMask
);
1535 check_component(blueMask
);
1536 check_component(depthBits
);
1537 check_component(stencilBits
);
1539 #undef check_component
1546 * Check if the viewport/scissor size has not yet been initialized.
1547 * Initialize the size if the given width and height are non-zero.
1550 check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1552 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1555 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1556 * potential infinite recursion.
1558 ctx
->ViewportInitialized
= GL_TRUE
;
1560 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1561 * yet, so just initialize all of them.
1563 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1564 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1565 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1572 handle_first_current(struct gl_context
*ctx
)
1574 if (ctx
->Version
== 0 || !ctx
->DrawBuffer
) {
1575 /* probably in the process of tearing down the context */
1579 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1581 check_context_limits(ctx
);
1583 /* According to GL_MESA_configless_context the default value of
1584 * glDrawBuffers depends on the config of the first surface it is bound to.
1585 * For GLES it is always GL_BACK which has a magic interpretation.
1587 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1588 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1591 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1596 _mesa_drawbuffers(ctx
, ctx
->DrawBuffer
, 1, &buffer
,
1597 NULL
/* destMask */);
1600 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1601 gl_buffer_index bufferIndex
;
1604 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1606 bufferIndex
= BUFFER_BACK_LEFT
;
1610 bufferIndex
= BUFFER_FRONT_LEFT
;
1613 _mesa_readbuffer(ctx
, ctx
->ReadBuffer
, buffer
, bufferIndex
);
1617 /* Determine if generic vertex attribute 0 aliases the conventional
1618 * glVertex position.
1621 const bool is_forward_compatible_context
=
1622 ctx
->Const
.ContextFlags
& GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT
;
1624 /* In OpenGL 3.1 attribute 0 becomes non-magic, just like in OpenGL ES
1625 * 2.0. Note that we cannot just check for API_OPENGL_COMPAT here because
1626 * that will erroneously allow this usage in a 3.0 forward-compatible
1629 ctx
->_AttribZeroAliasesVertex
= (ctx
->API
== API_OPENGLES
1630 || (ctx
->API
== API_OPENGL_COMPAT
1631 && !is_forward_compatible_context
));
1634 /* We can use this to help debug user's problems. Tell them to set
1635 * the MESA_INFO env variable before running their app. Then the
1636 * first time each context is made current we'll print some useful
1639 if (getenv("MESA_INFO")) {
1640 _mesa_print_info(ctx
);
1645 * Bind the given context to the given drawBuffer and readBuffer and
1646 * make it the current context for the calling thread.
1647 * We'll render into the drawBuffer and read pixels from the
1648 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1650 * We check that the context's and framebuffer's visuals are compatible
1651 * and return immediately if they're not.
1653 * \param newCtx the new GL context. If NULL then there will be no current GL
1655 * \param drawBuffer the drawing framebuffer
1656 * \param readBuffer the reading framebuffer
1659 _mesa_make_current( struct gl_context
*newCtx
,
1660 struct gl_framebuffer
*drawBuffer
,
1661 struct gl_framebuffer
*readBuffer
)
1663 GET_CURRENT_CONTEXT(curCtx
);
1665 if (MESA_VERBOSE
& VERBOSE_API
)
1666 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1668 /* Check that the context's and framebuffer's visuals are compatible.
1670 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1671 if (!check_compatible(newCtx
, drawBuffer
)) {
1672 _mesa_warning(newCtx
,
1673 "MakeCurrent: incompatible visuals for context and drawbuffer");
1677 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1678 if (!check_compatible(newCtx
, readBuffer
)) {
1679 _mesa_warning(newCtx
,
1680 "MakeCurrent: incompatible visuals for context and readbuffer");
1686 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1687 /* make sure this context is valid for flushing */
1689 curCtx
->Const
.ContextReleaseBehavior
==
1690 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
) {
1691 _mesa_flush(curCtx
);
1694 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1697 _glapi_set_dispatch(NULL
); /* none current */
1698 /* We need old ctx to correctly release Draw/ReadBuffer
1699 * and avoid a surface leak in st_renderbuffer_delete.
1700 * Therefore, first drop buffers then set new ctx to NULL.
1703 _mesa_reference_framebuffer(&curCtx
->WinSysDrawBuffer
, NULL
);
1704 _mesa_reference_framebuffer(&curCtx
->WinSysReadBuffer
, NULL
);
1706 _glapi_set_context(NULL
);
1707 assert(_mesa_get_current_context() == NULL
);
1710 _glapi_set_context((void *) newCtx
);
1711 assert(_mesa_get_current_context() == newCtx
);
1712 _glapi_set_dispatch(newCtx
->CurrentClientDispatch
);
1714 if (drawBuffer
&& readBuffer
) {
1715 assert(_mesa_is_winsys_fbo(drawBuffer
));
1716 assert(_mesa_is_winsys_fbo(readBuffer
));
1717 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1718 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1721 * Only set the context's Draw/ReadBuffer fields if they're NULL
1722 * or not bound to a user-created FBO.
1724 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1725 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1726 /* Update the FBO's list of drawbuffers/renderbuffers.
1727 * For winsys FBOs this comes from the GL state (which may have
1728 * changed since the last time this FBO was bound).
1730 _mesa_update_draw_buffers(newCtx
);
1732 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1733 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1734 /* In _mesa_initialize_window_framebuffer, for single-buffered
1735 * visuals, the ColorReadBuffer is set to be GL_FRONT, even with
1736 * GLES contexts. When calling read_buffer, we verify we are reading
1737 * from GL_BACK in is_legal_es3_readbuffer_enum. But the default is
1738 * incorrect, and certain dEQP tests check this. So fix it here.
1740 if (_mesa_is_gles(newCtx
) &&
1741 !newCtx
->ReadBuffer
->Visual
.doubleBufferMode
)
1742 if (newCtx
->ReadBuffer
->ColorReadBuffer
== GL_FRONT
)
1743 newCtx
->ReadBuffer
->ColorReadBuffer
= GL_BACK
;
1746 /* XXX only set this flag if we're really changing the draw/read
1747 * framebuffer bindings.
1749 newCtx
->NewState
|= _NEW_BUFFERS
;
1751 check_init_viewport(newCtx
, drawBuffer
->Width
, drawBuffer
->Height
);
1754 if (newCtx
->FirstTimeCurrent
) {
1755 handle_first_current(newCtx
);
1756 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1765 * Make context 'ctx' share the display lists, textures and programs
1766 * that are associated with 'ctxToShare'.
1767 * Any display lists, textures or programs associated with 'ctx' will
1768 * be deleted if nobody else is sharing them.
1771 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1773 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1774 struct gl_shared_state
*oldShared
= NULL
;
1776 /* save ref to old state to prevent it from being deleted immediately */
1777 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1779 /* update ctx's Shared pointer */
1780 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1782 update_default_objects(ctx
);
1784 /* release the old shared state */
1785 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1797 * \return pointer to the current GL context for this thread.
1799 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1800 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1804 _mesa_get_current_context( void )
1806 return (struct gl_context
*) _glapi_get_context();
1811 * Get context's current API dispatch table.
1813 * It'll either be the immediate-mode execute dispatcher, the display list
1814 * compile dispatcher, or the thread marshalling dispatcher.
1816 * \param ctx GL context.
1818 * \return pointer to dispatch_table.
1820 * Simply returns __struct gl_contextRec::CurrentClientDispatch.
1822 struct _glapi_table
*
1823 _mesa_get_dispatch(struct gl_context
*ctx
)
1825 return ctx
->CurrentClientDispatch
;
1831 /**********************************************************************/
1832 /** \name Miscellaneous functions */
1833 /**********************************************************************/
1839 * \param ctx GL context.
1840 * \param error error code.
1842 * Records the given error code and call the driver's dd_function_table::Error
1843 * function if defined.
1846 * This is called via _mesa_error().
1849 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1854 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1855 ctx
->ErrorValue
= error
;
1864 _mesa_flush(struct gl_context
*ctx
)
1866 FLUSH_VERTICES( ctx
, 0 );
1867 FLUSH_CURRENT( ctx
, 0 );
1868 if (ctx
->Driver
.Flush
) {
1869 ctx
->Driver
.Flush(ctx
);
1876 * Flush commands and wait for completion.
1878 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1879 * dd_function_table::Finish driver callback, if not NULL.
1884 GET_CURRENT_CONTEXT(ctx
);
1885 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1887 FLUSH_VERTICES(ctx
, 0);
1888 FLUSH_CURRENT(ctx
, 0);
1890 if (ctx
->Driver
.Finish
) {
1891 ctx
->Driver
.Finish(ctx
);
1897 * Execute glFlush().
1899 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1900 * dd_function_table::Flush driver callback, if not NULL.
1905 GET_CURRENT_CONTEXT(ctx
);
1906 ASSERT_OUTSIDE_BEGIN_END(ctx
);