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"
88 #include "bufferobj.h"
92 #include "debug_output.h"
96 #include "extensions.h"
101 #include "framebuffer.h"
108 #include "multisample.h"
109 #include "performance_monitor.h"
110 #include "pipelineobj.h"
112 #include "pixelstore.h"
115 #include "queryobj.h"
121 #include "shaderobj.h"
122 #include "shaderimage.h"
123 #include "util/simple_list.h"
124 #include "util/strtod.h"
127 #include "texcompress_s3tc.h"
128 #include "texstate.h"
129 #include "transformfeedback.h"
133 #include "viewport.h"
135 #include "program/program.h"
136 #include "program/prog_print.h"
137 #include "math/m_matrix.h"
138 #include "main/dispatch.h" /* for _gloffset_COUNT */
139 #include "uniforms.h"
143 #include "sparc/sparc.h"
146 #include "compiler/glsl/glsl_parser_extras.h"
151 int MESA_VERBOSE
= 0;
154 #ifndef MESA_DEBUG_FLAGS
155 int MESA_DEBUG_FLAGS
= 0;
159 /* ubyte -> float conversion */
160 GLfloat _mesa_ubyte_to_float_color_tab
[256];
165 * Swap buffers notification callback.
167 * \param ctx GL context.
169 * Called by window system just before swapping buffers.
170 * We have to finish any pending rendering.
173 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
175 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
176 _mesa_debug(ctx
, "SwapBuffers\n");
177 FLUSH_CURRENT( ctx
, 0 );
178 if (ctx
->Driver
.Flush
) {
179 ctx
->Driver
.Flush(ctx
);
184 /**********************************************************************/
185 /** \name GL Visual allocation/destruction */
186 /**********************************************************************/
190 * Allocates a struct gl_config structure and initializes it via
191 * _mesa_initialize_visual().
193 * \param dbFlag double buffering
194 * \param stereoFlag stereo buffer
195 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
196 * is acceptable but the actual depth type will be GLushort or GLuint as
198 * \param stencilBits requested minimum bits per stencil buffer value
199 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
200 * of bits per color component in accum buffer.
201 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
202 * \param redBits number of bits per color component in frame buffer for RGB(A)
203 * mode. We always use 8 in core Mesa though.
204 * \param greenBits same as above.
205 * \param blueBits same as above.
206 * \param alphaBits same as above.
207 * \param numSamples not really used.
209 * \return pointer to new struct gl_config or NULL if requested parameters
212 * \note Need to add params for level and numAuxBuffers (at least)
215 _mesa_create_visual( GLboolean dbFlag
,
216 GLboolean stereoFlag
,
224 GLint accumGreenBits
,
226 GLint accumAlphaBits
,
229 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
231 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
232 redBits
, greenBits
, blueBits
, alphaBits
,
233 depthBits
, stencilBits
,
234 accumRedBits
, accumGreenBits
,
235 accumBlueBits
, accumAlphaBits
,
246 * Makes some sanity checks and fills in the fields of the struct
247 * gl_config object with the given parameters. If the caller needs to
248 * set additional fields, he should just probably init the whole
249 * gl_config object himself.
251 * \return GL_TRUE on success, or GL_FALSE on failure.
253 * \sa _mesa_create_visual() above for the parameter description.
256 _mesa_initialize_visual( struct gl_config
*vis
,
258 GLboolean stereoFlag
,
266 GLint accumGreenBits
,
268 GLint accumAlphaBits
,
273 if (depthBits
< 0 || depthBits
> 32) {
276 if (stencilBits
< 0 || stencilBits
> 8) {
279 assert(accumRedBits
>= 0);
280 assert(accumGreenBits
>= 0);
281 assert(accumBlueBits
>= 0);
282 assert(accumAlphaBits
>= 0);
284 vis
->rgbMode
= GL_TRUE
;
285 vis
->doubleBufferMode
= dbFlag
;
286 vis
->stereoMode
= stereoFlag
;
288 vis
->redBits
= redBits
;
289 vis
->greenBits
= greenBits
;
290 vis
->blueBits
= blueBits
;
291 vis
->alphaBits
= alphaBits
;
292 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
295 vis
->depthBits
= depthBits
;
296 vis
->stencilBits
= stencilBits
;
298 vis
->accumRedBits
= accumRedBits
;
299 vis
->accumGreenBits
= accumGreenBits
;
300 vis
->accumBlueBits
= accumBlueBits
;
301 vis
->accumAlphaBits
= accumAlphaBits
;
303 vis
->haveAccumBuffer
= accumRedBits
> 0;
304 vis
->haveDepthBuffer
= depthBits
> 0;
305 vis
->haveStencilBuffer
= stencilBits
> 0;
307 vis
->numAuxBuffers
= 0;
309 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
310 vis
->samples
= numSamples
;
317 * Destroy a visual and free its memory.
321 * Frees the visual structure.
324 _mesa_destroy_visual( struct gl_config
*vis
)
332 /**********************************************************************/
333 /** \name Context allocation, initialization, destroying
335 * The purpose of the most initialization functions here is to provide the
336 * default state values according to the OpenGL specification.
338 /**********************************************************************/
343 * One-time initialization mutex lock.
345 * \sa Used by one_time_init().
347 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
351 * Calls all the various one-time-fini functions in Mesa
357 _mesa_destroy_shader_compiler();
362 * Calls all the various one-time-init functions in Mesa.
364 * While holding a global mutex lock, calls several initialization functions,
365 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
371 one_time_init( struct gl_context
*ctx
)
373 static GLbitfield api_init_mask
= 0x0;
375 mtx_lock(&OneTimeLock
);
377 /* truly one-time init */
378 if (!api_init_mask
) {
381 STATIC_ASSERT(sizeof(GLbyte
) == 1);
382 STATIC_ASSERT(sizeof(GLubyte
) == 1);
383 STATIC_ASSERT(sizeof(GLshort
) == 2);
384 STATIC_ASSERT(sizeof(GLushort
) == 2);
385 STATIC_ASSERT(sizeof(GLint
) == 4);
386 STATIC_ASSERT(sizeof(GLuint
) == 4);
390 _mesa_one_time_init_extension_overrides();
392 _mesa_get_cpu_features();
394 for (i
= 0; i
< 256; i
++) {
395 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
398 atexit(one_time_fini
);
400 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
401 if (MESA_VERBOSE
!= 0) {
402 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
403 PACKAGE_VERSION
, __DATE__
, __TIME__
);
408 /* per-API one-time init */
409 if (!(api_init_mask
& (1 << ctx
->API
))) {
410 _mesa_init_get_hash(ctx
);
412 _mesa_init_remap_table();
415 api_init_mask
|= 1 << ctx
->API
;
417 mtx_unlock(&OneTimeLock
);
422 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
425 _mesa_init_current(struct gl_context
*ctx
)
429 /* Init all to (0,0,0,1) */
430 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
431 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
434 /* redo special cases: */
435 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
436 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
437 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
438 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
439 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
440 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
445 * Init vertex/fragment/geometry program limits.
446 * Important: drivers should override these with actual limits.
449 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
450 struct gl_program_constants
*prog
)
452 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
453 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
454 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
455 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
456 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
457 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
458 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
459 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
462 case MESA_SHADER_VERTEX
:
463 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
464 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
465 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
466 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
467 prog
->MaxInputComponents
= 0; /* value not used */
468 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
470 case MESA_SHADER_FRAGMENT
:
471 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
472 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
473 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
474 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
475 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
476 prog
->MaxOutputComponents
= 0; /* value not used */
478 case MESA_SHADER_TESS_CTRL
:
479 case MESA_SHADER_TESS_EVAL
:
480 case MESA_SHADER_GEOMETRY
:
481 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
482 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
483 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
484 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
485 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
486 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
488 case MESA_SHADER_COMPUTE
:
489 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
490 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
491 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
492 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
493 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
494 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
497 assert(0 && "Bad shader stage in init_program_limits()");
500 /* Set the native limits to zero. This implies that there is no native
501 * support for shaders. Let the drivers fill in the actual values.
503 prog
->MaxNativeInstructions
= 0;
504 prog
->MaxNativeAluInstructions
= 0;
505 prog
->MaxNativeTexInstructions
= 0;
506 prog
->MaxNativeTexIndirections
= 0;
507 prog
->MaxNativeAttribs
= 0;
508 prog
->MaxNativeTemps
= 0;
509 prog
->MaxNativeAddressRegs
= 0;
510 prog
->MaxNativeParameters
= 0;
512 /* Set GLSL datatype range/precision info assuming IEEE float values.
513 * Drivers should override these defaults as needed.
515 prog
->MediumFloat
.RangeMin
= 127;
516 prog
->MediumFloat
.RangeMax
= 127;
517 prog
->MediumFloat
.Precision
= 23;
518 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
520 /* Assume ints are stored as floats for now, since this is the least-common
521 * denominator. The OpenGL ES spec implies (page 132) that the precision
522 * of integer types should be 0. Practically speaking, IEEE
523 * single-precision floating point values can only store integers in the
524 * range [-0x01000000, 0x01000000] without loss of precision.
526 prog
->MediumInt
.RangeMin
= 24;
527 prog
->MediumInt
.RangeMax
= 24;
528 prog
->MediumInt
.Precision
= 0;
529 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
531 prog
->MaxUniformBlocks
= 12;
532 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
533 consts
->MaxUniformBlockSize
/ 4 *
534 prog
->MaxUniformBlocks
);
536 prog
->MaxAtomicBuffers
= 0;
537 prog
->MaxAtomicCounters
= 0;
539 prog
->MaxShaderStorageBlocks
= 8;
544 * Initialize fields of gl_constants (aka ctx->Const.*).
545 * Use defaults from config.h. The device drivers will often override
546 * some of these values (such as number of texture units).
549 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
554 /* Constants, may be overriden (usually only reduced) by device drivers */
555 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
556 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
557 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
558 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
559 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
560 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
561 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
562 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
563 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
564 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
565 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
566 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
567 consts
->MaxTextureBufferSize
= 65536;
568 consts
->TextureBufferOffsetAlignment
= 1;
569 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
570 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
571 consts
->MinPointSize
= MIN_POINT_SIZE
;
572 consts
->MaxPointSize
= MAX_POINT_SIZE
;
573 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
574 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
575 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
576 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
577 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
578 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
579 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
580 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
581 consts
->MaxClipPlanes
= 6;
582 consts
->MaxLights
= MAX_LIGHTS
;
583 consts
->MaxShininess
= 128.0;
584 consts
->MaxSpotExponent
= 128.0;
585 consts
->MaxViewportWidth
= 16384;
586 consts
->MaxViewportHeight
= 16384;
587 consts
->MinMapBufferAlignment
= 64;
589 /* Driver must override these values if ARB_viewport_array is supported. */
590 consts
->MaxViewports
= 1;
591 consts
->ViewportSubpixelBits
= 0;
592 consts
->ViewportBounds
.Min
= 0;
593 consts
->ViewportBounds
.Max
= 0;
595 /** GL_ARB_uniform_buffer_object */
596 consts
->MaxCombinedUniformBlocks
= 36;
597 consts
->MaxUniformBufferBindings
= 36;
598 consts
->MaxUniformBlockSize
= 16384;
599 consts
->UniformBufferOffsetAlignment
= 1;
601 /** GL_ARB_shader_storage_buffer_object */
602 consts
->MaxCombinedShaderStorageBlocks
= 8;
603 consts
->MaxShaderStorageBufferBindings
= 8;
604 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
605 consts
->ShaderStorageBufferOffsetAlignment
= 256;
607 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
608 consts
->MaxUserAssignableUniformLocations
=
609 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
611 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
612 init_program_limits(consts
, i
, &consts
->Program
[i
]);
614 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
615 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
617 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
618 * gl_VertexID is implemented using a native hardware register with OpenGL
621 consts
->VertexID_is_zero_based
= false;
623 /* GL_ARB_draw_buffers */
624 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
626 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
627 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
629 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
630 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
631 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
632 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
633 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
634 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
636 /* Shading language version */
637 consts
->GLSLVersion
= 120;
638 _mesa_override_glsl_version(consts
);
641 consts
->GenerateTemporaryNames
= true;
643 consts
->GenerateTemporaryNames
= false;
646 /* GL_ARB_framebuffer_object */
647 consts
->MaxSamples
= 0;
649 /* GLSL default if NativeIntegers == FALSE */
650 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
653 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
655 /* GL_EXT_provoking_vertex */
656 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
658 /** GL_ARB_viewport_array */
659 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
661 /* GL_EXT_transform_feedback */
662 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
663 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
664 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
665 consts
->MaxVertexStreams
= 1;
668 consts
->ProfileMask
= api
== API_OPENGL_CORE
669 ? GL_CONTEXT_CORE_PROFILE_BIT
670 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
673 consts
->MaxVertexAttribStride
= 2048;
675 /** GL_EXT_gpu_shader4 */
676 consts
->MinProgramTexelOffset
= -8;
677 consts
->MaxProgramTexelOffset
= 7;
679 /* GL_ARB_texture_gather */
680 consts
->MinProgramTextureGatherOffset
= -8;
681 consts
->MaxProgramTextureGatherOffset
= 7;
683 /* GL_ARB_robustness */
684 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
686 /* ES 3.0 or ARB_ES3_compatibility */
687 consts
->MaxElementIndex
= 0xffffffffu
;
689 /* GL_ARB_texture_multisample */
690 consts
->MaxColorTextureSamples
= 1;
691 consts
->MaxDepthTextureSamples
= 1;
692 consts
->MaxIntegerSamples
= 1;
694 /* GL_ARB_shader_atomic_counters */
695 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
696 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
697 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
698 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
700 /* GL_ARB_vertex_attrib_binding */
701 consts
->MaxVertexAttribRelativeOffset
= 2047;
702 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
704 /* GL_ARB_compute_shader */
705 consts
->MaxComputeWorkGroupCount
[0] = 65535;
706 consts
->MaxComputeWorkGroupCount
[1] = 65535;
707 consts
->MaxComputeWorkGroupCount
[2] = 65535;
708 consts
->MaxComputeWorkGroupSize
[0] = 1024;
709 consts
->MaxComputeWorkGroupSize
[1] = 1024;
710 consts
->MaxComputeWorkGroupSize
[2] = 64;
711 /* Enables compute support for GLES 3.1 if >= 128 */
712 consts
->MaxComputeWorkGroupInvocations
= 0;
714 /** GL_ARB_gpu_shader5 */
715 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
716 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
718 /** GL_KHR_context_flush_control */
719 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
721 /** GL_ARB_tessellation_shader */
722 consts
->MaxTessGenLevel
= MAX_TESS_GEN_LEVEL
;
723 consts
->MaxPatchVertices
= MAX_PATCH_VERTICES
;
724 consts
->Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
725 consts
->Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
726 consts
->MaxTessPatchComponents
= MAX_TESS_PATCH_COMPONENTS
;
727 consts
->MaxTessControlTotalOutputComponents
= MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS
;
728 consts
->PrimitiveRestartForPatches
= false;
733 * Do some sanity checks on the limits/constants for the given context.
734 * Only called the first time a context is bound.
737 check_context_limits(struct gl_context
*ctx
)
741 /* check that we don't exceed the size of various bitfields */
742 assert(VARYING_SLOT_MAX
<=
743 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
744 assert(VARYING_SLOT_MAX
<=
745 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
747 /* shader-related checks */
748 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
749 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
751 /* Texture unit checks */
752 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
753 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
754 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
755 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
756 assert(ctx
->Const
.MaxTextureUnits
> 0);
757 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
758 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
759 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
760 ctx
->Const
.MaxTextureCoordUnits
));
761 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
762 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
763 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
764 /* number of coord units cannot be greater than number of image units */
765 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
768 /* Texture size checks */
769 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
770 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
771 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
772 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
774 /* Texture level checks */
775 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
776 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
778 /* Max texture size should be <= max viewport size (render to texture) */
779 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
780 <= ctx
->Const
.MaxViewportWidth
);
781 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
782 <= ctx
->Const
.MaxViewportHeight
);
784 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
786 /* if this fails, add more enum values to gl_buffer_index */
787 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
789 /* XXX probably add more tests */
794 * Initialize the attribute groups in a GL context.
796 * \param ctx GL context.
798 * Initializes all the attributes, calling the respective <tt>init*</tt>
799 * functions for the more complex data structures.
802 init_attrib_groups(struct gl_context
*ctx
)
807 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
810 _mesa_init_extensions(&ctx
->Extensions
);
812 /* Attribute Groups */
813 _mesa_init_accum( ctx
);
814 _mesa_init_attrib( ctx
);
815 _mesa_init_buffer_objects( ctx
);
816 _mesa_init_color( ctx
);
817 _mesa_init_current( ctx
);
818 _mesa_init_depth( ctx
);
819 _mesa_init_debug( ctx
);
820 _mesa_init_debug_output( ctx
);
821 _mesa_init_display_list( ctx
);
822 _mesa_init_eval( ctx
);
823 _mesa_init_fbobjects( ctx
);
824 _mesa_init_feedback( ctx
);
825 _mesa_init_fog( ctx
);
826 _mesa_init_hint( ctx
);
827 _mesa_init_image_units( ctx
);
828 _mesa_init_line( ctx
);
829 _mesa_init_lighting( ctx
);
830 _mesa_init_matrix( ctx
);
831 _mesa_init_multisample( ctx
);
832 _mesa_init_performance_monitors( ctx
);
833 _mesa_init_pipeline( ctx
);
834 _mesa_init_pixel( ctx
);
835 _mesa_init_pixelstore( ctx
);
836 _mesa_init_point( ctx
);
837 _mesa_init_polygon( ctx
);
838 _mesa_init_program( ctx
);
839 _mesa_init_queryobj( ctx
);
840 _mesa_init_sync( ctx
);
841 _mesa_init_rastpos( ctx
);
842 _mesa_init_scissor( ctx
);
843 _mesa_init_shader_state( ctx
);
844 _mesa_init_stencil( ctx
);
845 _mesa_init_transform( ctx
);
846 _mesa_init_transform_feedback( ctx
);
847 _mesa_init_varray( ctx
);
848 _mesa_init_viewport( ctx
);
850 if (!_mesa_init_texture( ctx
))
853 _mesa_init_texture_s3tc( ctx
);
856 ctx
->NewState
= _NEW_ALL
;
857 ctx
->NewDriverState
= ~0;
858 ctx
->ErrorValue
= GL_NO_ERROR
;
859 ctx
->ShareGroupReset
= false;
860 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
867 * Update default objects in a GL context with respect to shared state.
869 * \param ctx GL context.
871 * Removes references to old default objects, (texture objects, program
872 * objects, etc.) and changes to reference those from the current shared
876 update_default_objects(struct gl_context
*ctx
)
880 _mesa_update_default_objects_program(ctx
);
881 _mesa_update_default_objects_texture(ctx
);
882 _mesa_update_default_objects_buffer_objects(ctx
);
888 /* XXX this is temporary and should be removed at some point in the
889 * future when there's a reasonable expectation that the libGL library
890 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
891 * functions which were added in Mesa 10.6.
894 /* Avoid libGL / driver ABI break */
895 #define USE_GLAPI_NOP_FEATURES 0
897 #define USE_GLAPI_NOP_FEATURES 1
902 * This function is called by the glapi no-op functions. For each OpenGL
903 * function/entrypoint there's a simple no-op function. These "no-op"
904 * functions call this function.
906 * If there's a current OpenGL context for the calling thread, we record a
907 * GL_INVALID_OPERATION error. This can happen either because the app's
908 * calling an unsupported extension function, or calling an illegal function
909 * (such as glClear between glBegin/glEnd).
911 * If there's no current OpenGL context for the calling thread, we can
912 * print a message to stderr.
914 * \param name the name of the OpenGL function
916 #if USE_GLAPI_NOP_FEATURES
918 nop_handler(const char *name
)
920 GET_CURRENT_CONTEXT(ctx
);
922 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
925 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
927 "GL User Error: gl%s called without a rendering context\n",
937 * Special no-op glFlush, see below.
940 static void GLAPIENTRY
943 /* don't record an error like we do in nop_handler() */
948 #if !USE_GLAPI_NOP_FEATURES
952 GET_CURRENT_CONTEXT(ctx
);
953 _mesa_error(ctx
, GL_INVALID_OPERATION
,
954 "unsupported function called "
955 "(unsupported extension or deprecated function?)");
962 * Create a new API dispatch table in which all entries point to the
963 * generic_nop() function. This will not work on Windows because of
964 * the __stdcall convention which requires the callee to clean up the
965 * call stack. That's impossible with one generic no-op function.
967 struct _glapi_table
*
968 _mesa_new_nop_table(unsigned numEntries
)
970 struct _glapi_table
*table
;
972 #if !USE_GLAPI_NOP_FEATURES
973 table
= malloc(numEntries
* sizeof(_glapi_proc
));
975 _glapi_proc
*entry
= (_glapi_proc
*) table
;
977 for (i
= 0; i
< numEntries
; i
++) {
978 entry
[i
] = (_glapi_proc
) generic_nop
;
982 table
= _glapi_new_nop_table(numEntries
);
989 * Allocate and initialize a new dispatch table. The table will be
990 * populated with pointers to "no-op" functions. In turn, the no-op
991 * functions will call nop_handler() above.
993 static struct _glapi_table
*
994 alloc_dispatch_table(void)
996 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
997 * In practice, this'll be the same for stand-alone Mesa. But for DRI
998 * Mesa we do this to accommodate different versions of libGL and various
1001 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1003 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1007 /* This is a special case for Windows in the event that
1008 * wglGetProcAddress is called between glBegin/End().
1010 * The MS opengl32.dll library apparently calls glFlush from
1011 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1012 * will dispatch to _mesa_generic_nop() and we'll generate a
1013 * GL_INVALID_OPERATION error.
1015 * The specific case which hits this is piglit's primitive-restart
1016 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1017 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1018 * code will try to resolve the function by calling wglGetProcAddress.
1019 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1020 * will fail causing the test to fail. By suppressing the error, the
1021 * assertion passes and the test continues.
1023 SET_Flush(table
, nop_glFlush
);
1027 #if USE_GLAPI_NOP_FEATURES
1028 _glapi_set_nop_handler(nop_handler
);
1035 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1037 * This ensures that we generate GL_INVALID_OPERATION errors from most
1038 * functions, since the set of functions that are valid within Begin/End is
1041 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1044 * "The only GL commands that are allowed within any Begin/End pairs are
1045 * the commands for specifying vertex coordinates, vertex color, normal
1046 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1047 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1048 * commands for specifying lighting material parameters (Material
1049 * commands see section 2.12.2), display list invocation commands
1050 * (CallList and CallLists see section 5.4), and the EdgeFlag
1051 * command. Executing Begin after Begin has already been executed but
1052 * before an End is issued generates the INVALID OPERATION error, as does
1053 * executing End without a previous corresponding Begin. Executing any
1054 * other GL command within Begin/End results in the error INVALID
1057 * The table entries for specifying vertex attributes are set up by
1058 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1059 * are set by install_vtxfmt() as well.
1061 static struct _glapi_table
*
1062 create_beginend_table(const struct gl_context
*ctx
)
1064 struct _glapi_table
*table
;
1066 table
= alloc_dispatch_table();
1070 /* Fill in functions which return a value, since they should return some
1071 * specific value even if they emit a GL_INVALID_OPERATION error from them
1072 * being called within glBegin()/glEnd().
1074 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1076 COPY_DISPATCH(GenLists
);
1077 COPY_DISPATCH(IsProgram
);
1078 COPY_DISPATCH(IsVertexArray
);
1079 COPY_DISPATCH(IsBuffer
);
1080 COPY_DISPATCH(IsEnabled
);
1081 COPY_DISPATCH(IsEnabledi
);
1082 COPY_DISPATCH(IsRenderbuffer
);
1083 COPY_DISPATCH(IsFramebuffer
);
1084 COPY_DISPATCH(CheckFramebufferStatus
);
1085 COPY_DISPATCH(RenderMode
);
1086 COPY_DISPATCH(GetString
);
1087 COPY_DISPATCH(GetStringi
);
1088 COPY_DISPATCH(GetPointerv
);
1089 COPY_DISPATCH(IsQuery
);
1090 COPY_DISPATCH(IsSampler
);
1091 COPY_DISPATCH(IsSync
);
1092 COPY_DISPATCH(IsTexture
);
1093 COPY_DISPATCH(IsTransformFeedback
);
1094 COPY_DISPATCH(DeleteQueries
);
1095 COPY_DISPATCH(AreTexturesResident
);
1096 COPY_DISPATCH(FenceSync
);
1097 COPY_DISPATCH(ClientWaitSync
);
1098 COPY_DISPATCH(MapBuffer
);
1099 COPY_DISPATCH(UnmapBuffer
);
1100 COPY_DISPATCH(MapBufferRange
);
1101 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1102 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1104 _mesa_loopback_init_api_table(ctx
, table
);
1110 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1112 /* Do the code-generated setup of the exec table in api_exec.c. */
1113 _mesa_initialize_exec_table(ctx
);
1116 _mesa_initialize_save_table(ctx
);
1120 * Initialize a struct gl_context struct (rendering context).
1122 * This includes allocating all the other structs and arrays which hang off of
1123 * the context by pointers.
1124 * Note that the driver needs to pass in its dd_function_table here since
1125 * we need to at least call driverFunctions->NewTextureObject to create the
1126 * default texture objects.
1128 * Called by _mesa_create_context().
1130 * Performs the imports and exports callback tables initialization, and
1131 * miscellaneous one-time initializations. If no shared context is supplied one
1132 * is allocated, and increase its reference count. Setups the GL API dispatch
1133 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1134 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1137 * \param ctx the context to initialize
1138 * \param api the GL API type to create the context for
1139 * \param visual describes the visual attributes for this context or NULL to
1140 * create a configless context
1141 * \param share_list points to context to share textures, display lists,
1143 * \param driverFunctions table of device driver functions for this context
1147 _mesa_initialize_context(struct gl_context
*ctx
,
1149 const struct gl_config
*visual
,
1150 struct gl_context
*share_list
,
1151 const struct dd_function_table
*driverFunctions
)
1153 struct gl_shared_state
*shared
;
1156 assert(driverFunctions
->NewTextureObject
);
1157 assert(driverFunctions
->FreeTextureImageBuffer
);
1160 ctx
->DrawBuffer
= NULL
;
1161 ctx
->ReadBuffer
= NULL
;
1162 ctx
->WinSysDrawBuffer
= NULL
;
1163 ctx
->WinSysReadBuffer
= NULL
;
1166 ctx
->Visual
= *visual
;
1167 ctx
->HasConfig
= GL_TRUE
;
1170 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1171 ctx
->HasConfig
= GL_FALSE
;
1174 _mesa_override_gl_version(ctx
);
1176 /* misc one-time initializations */
1179 /* Plug in driver functions and context pointer here.
1180 * This is important because when we call alloc_shared_state() below
1181 * we'll call ctx->Driver.NewTextureObject() to create the default
1184 ctx
->Driver
= *driverFunctions
;
1187 /* share state with another context */
1188 shared
= share_list
->Shared
;
1191 /* allocate new, unshared state */
1192 shared
= _mesa_alloc_shared_state(ctx
);
1197 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1199 if (!init_attrib_groups( ctx
))
1202 /* setup the API dispatch tables with all nop functions */
1203 ctx
->OutsideBeginEnd
= alloc_dispatch_table();
1204 if (!ctx
->OutsideBeginEnd
)
1206 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1207 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1209 ctx
->FragmentProgram
._MaintainTexEnvProgram
1210 = (getenv("MESA_TEX_PROG") != NULL
);
1212 ctx
->VertexProgram
._MaintainTnlProgram
1213 = (getenv("MESA_TNL_PROG") != NULL
);
1214 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1215 /* this is required... */
1216 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1219 /* Mesa core handles all the formats that mesa core knows about.
1220 * Drivers will want to override this list with just the formats
1221 * they can handle, and confirm that appropriate fallbacks exist in
1222 * _mesa_choose_tex_format().
1224 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1225 sizeof(ctx
->TextureFormatSupported
));
1228 case API_OPENGL_COMPAT
:
1229 ctx
->BeginEnd
= create_beginend_table(ctx
);
1230 ctx
->Save
= alloc_dispatch_table();
1231 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1235 case API_OPENGL_CORE
:
1239 * GL_OES_texture_cube_map says
1240 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1242 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1243 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1244 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1245 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1246 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1247 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1248 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1249 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1253 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1254 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1258 ctx
->FirstTimeCurrent
= GL_TRUE
;
1263 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1264 free(ctx
->BeginEnd
);
1265 free(ctx
->OutsideBeginEnd
);
1272 * Allocate and initialize a struct gl_context structure.
1273 * Note that the driver needs to pass in its dd_function_table here since
1274 * we need to at least call driverFunctions->NewTextureObject to initialize
1275 * the rendering context.
1277 * \param api the GL API type to create the context for
1278 * \param visual a struct gl_config pointer (we copy the struct contents) or
1279 * NULL to create a configless context
1280 * \param share_list another context to share display lists with or NULL
1281 * \param driverFunctions points to the dd_function_table into which the
1282 * driver has plugged in all its special functions.
1284 * \return pointer to a new __struct gl_contextRec or NULL if error.
1287 _mesa_create_context(gl_api api
,
1288 const struct gl_config
*visual
,
1289 struct gl_context
*share_list
,
1290 const struct dd_function_table
*driverFunctions
)
1292 struct gl_context
*ctx
;
1294 ctx
= calloc(1, sizeof(struct gl_context
));
1298 if (_mesa_initialize_context(ctx
, api
, visual
, share_list
,
1310 * Free the data associated with the given context.
1312 * But doesn't free the struct gl_context struct itself.
1314 * \sa _mesa_initialize_context() and init_attrib_groups().
1317 _mesa_free_context_data( struct gl_context
*ctx
)
1319 if (!_mesa_get_current_context()){
1320 /* No current context, but we may need one in order to delete
1321 * texture objs, etc. So temporarily bind the context now.
1323 _mesa_make_current(ctx
, NULL
, NULL
);
1326 /* unreference WinSysDraw/Read buffers */
1327 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1328 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1329 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1330 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1332 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1333 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1334 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1336 _mesa_reference_tesscprog(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1337 _mesa_reference_tesseprog(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1338 _mesa_reference_geomprog(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1340 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1341 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1342 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1344 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1345 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1347 _mesa_free_attrib_data(ctx
);
1348 _mesa_free_buffer_objects(ctx
);
1349 _mesa_free_eval_data( ctx
);
1350 _mesa_free_texture_data( ctx
);
1351 _mesa_free_matrix_data( ctx
);
1352 _mesa_free_pipeline_data(ctx
);
1353 _mesa_free_program_data(ctx
);
1354 _mesa_free_shader_state(ctx
);
1355 _mesa_free_queryobj_data(ctx
);
1356 _mesa_free_sync_data(ctx
);
1357 _mesa_free_varray_data(ctx
);
1358 _mesa_free_transform_feedback(ctx
);
1359 _mesa_free_performance_monitors(ctx
);
1361 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1362 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1363 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1364 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1366 /* free dispatch tables */
1367 free(ctx
->BeginEnd
);
1368 free(ctx
->OutsideBeginEnd
);
1371 /* Shared context state (display lists, textures, etc) */
1372 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1374 /* needs to be after freeing shared state */
1375 _mesa_free_display_list_data(ctx
);
1377 _mesa_free_errors_data(ctx
);
1379 free((void *)ctx
->Extensions
.String
);
1381 free(ctx
->VersionString
);
1383 /* unbind the context if it's currently bound */
1384 if (ctx
== _mesa_get_current_context()) {
1385 _mesa_make_current(NULL
, NULL
, NULL
);
1391 * Destroy a struct gl_context structure.
1393 * \param ctx GL context.
1395 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1398 _mesa_destroy_context( struct gl_context
*ctx
)
1401 _mesa_free_context_data(ctx
);
1402 free( (void *) ctx
);
1408 * Copy attribute groups from one context to another.
1410 * \param src source context
1411 * \param dst destination context
1412 * \param mask bitwise OR of GL_*_BIT flags
1414 * According to the bits specified in \p mask, copies the corresponding
1415 * attributes from \p src into \p dst. For many of the attributes a simple \c
1416 * memcpy is not enough due to the existence of internal pointers in their data
1420 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1423 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1425 dst
->Accum
= src
->Accum
;
1427 if (mask
& GL_COLOR_BUFFER_BIT
) {
1429 dst
->Color
= src
->Color
;
1431 if (mask
& GL_CURRENT_BIT
) {
1433 dst
->Current
= src
->Current
;
1435 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1437 dst
->Depth
= src
->Depth
;
1439 if (mask
& GL_ENABLE_BIT
) {
1442 if (mask
& GL_EVAL_BIT
) {
1444 dst
->Eval
= src
->Eval
;
1446 if (mask
& GL_FOG_BIT
) {
1448 dst
->Fog
= src
->Fog
;
1450 if (mask
& GL_HINT_BIT
) {
1452 dst
->Hint
= src
->Hint
;
1454 if (mask
& GL_LIGHTING_BIT
) {
1456 /* begin with memcpy */
1457 dst
->Light
= src
->Light
;
1458 /* fixup linked lists to prevent pointer insanity */
1459 make_empty_list( &(dst
->Light
.EnabledList
) );
1460 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1461 if (dst
->Light
.Light
[i
].Enabled
) {
1462 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1466 if (mask
& GL_LINE_BIT
) {
1468 dst
->Line
= src
->Line
;
1470 if (mask
& GL_LIST_BIT
) {
1472 dst
->List
= src
->List
;
1474 if (mask
& GL_PIXEL_MODE_BIT
) {
1476 dst
->Pixel
= src
->Pixel
;
1478 if (mask
& GL_POINT_BIT
) {
1480 dst
->Point
= src
->Point
;
1482 if (mask
& GL_POLYGON_BIT
) {
1484 dst
->Polygon
= src
->Polygon
;
1486 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1487 /* Use loop instead of memcpy due to problem with Portland Group's
1488 * C compiler. Reported by John Stone.
1491 for (i
= 0; i
< 32; i
++) {
1492 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1495 if (mask
& GL_SCISSOR_BIT
) {
1497 dst
->Scissor
= src
->Scissor
;
1499 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1501 dst
->Stencil
= src
->Stencil
;
1503 if (mask
& GL_TEXTURE_BIT
) {
1504 /* Cannot memcpy because of pointers */
1505 _mesa_copy_texture_state(src
, dst
);
1507 if (mask
& GL_TRANSFORM_BIT
) {
1509 dst
->Transform
= src
->Transform
;
1511 if (mask
& GL_VIEWPORT_BIT
) {
1513 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1515 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1519 /* XXX FIXME: Call callbacks?
1521 dst
->NewState
= _NEW_ALL
;
1522 dst
->NewDriverState
= ~0;
1527 * Check if the given context can render into the given framebuffer
1528 * by checking visual attributes.
1530 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1533 check_compatible(const struct gl_context
*ctx
,
1534 const struct gl_framebuffer
*buffer
)
1536 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1537 const struct gl_config
*bufvis
= &buffer
->Visual
;
1539 if (buffer
== _mesa_get_incomplete_framebuffer())
1542 #define check_component(foo) \
1543 if (ctxvis->foo && bufvis->foo && \
1544 ctxvis->foo != bufvis->foo) \
1547 check_component(redMask
);
1548 check_component(greenMask
);
1549 check_component(blueMask
);
1550 check_component(depthBits
);
1551 check_component(stencilBits
);
1553 #undef check_component
1560 * Check if the viewport/scissor size has not yet been initialized.
1561 * Initialize the size if the given width and height are non-zero.
1564 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1566 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1569 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1570 * potential infinite recursion.
1572 ctx
->ViewportInitialized
= GL_TRUE
;
1574 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1575 * yet, so just initialize all of them.
1577 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1578 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1579 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1585 handle_first_current(struct gl_context
*ctx
)
1587 if (ctx
->Version
== 0) {
1588 /* probably in the process of tearing down the context */
1592 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1594 check_context_limits(ctx
);
1596 /* According to GL_MESA_configless_context the default value of
1597 * glDrawBuffers depends on the config of the first surface it is bound to.
1598 * For GLES it is always GL_BACK which has a magic interpretation */
1599 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1600 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1603 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1608 _mesa_drawbuffers(ctx
, ctx
->DrawBuffer
, 1, &buffer
,
1609 NULL
/* destMask */);
1612 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1613 gl_buffer_index bufferIndex
;
1616 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1618 bufferIndex
= BUFFER_BACK_LEFT
;
1622 bufferIndex
= BUFFER_FRONT_LEFT
;
1625 _mesa_readbuffer(ctx
, ctx
->ReadBuffer
, buffer
, bufferIndex
);
1629 /* We can use this to help debug user's problems. Tell them to set
1630 * the MESA_INFO env variable before running their app. Then the
1631 * first time each context is made current we'll print some useful
1634 if (getenv("MESA_INFO")) {
1635 _mesa_print_info(ctx
);
1640 * Bind the given context to the given drawBuffer and readBuffer and
1641 * make it the current context for the calling thread.
1642 * We'll render into the drawBuffer and read pixels from the
1643 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1645 * We check that the context's and framebuffer's visuals are compatible
1646 * and return immediately if they're not.
1648 * \param newCtx the new GL context. If NULL then there will be no current GL
1650 * \param drawBuffer the drawing framebuffer
1651 * \param readBuffer the reading framebuffer
1654 _mesa_make_current( struct gl_context
*newCtx
,
1655 struct gl_framebuffer
*drawBuffer
,
1656 struct gl_framebuffer
*readBuffer
)
1658 GET_CURRENT_CONTEXT(curCtx
);
1660 if (MESA_VERBOSE
& VERBOSE_API
)
1661 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1663 /* Check that the context's and framebuffer's visuals are compatible.
1665 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1666 if (!check_compatible(newCtx
, drawBuffer
)) {
1667 _mesa_warning(newCtx
,
1668 "MakeCurrent: incompatible visuals for context and drawbuffer");
1672 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1673 if (!check_compatible(newCtx
, readBuffer
)) {
1674 _mesa_warning(newCtx
,
1675 "MakeCurrent: incompatible visuals for context and readbuffer");
1681 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1682 /* make sure this context is valid for flushing */
1684 curCtx
->Const
.ContextReleaseBehavior
==
1685 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
)
1686 _mesa_flush(curCtx
);
1688 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1689 _glapi_set_context((void *) newCtx
);
1690 assert(_mesa_get_current_context() == newCtx
);
1693 _glapi_set_dispatch(NULL
); /* none current */
1696 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1698 if (drawBuffer
&& readBuffer
) {
1699 assert(_mesa_is_winsys_fbo(drawBuffer
));
1700 assert(_mesa_is_winsys_fbo(readBuffer
));
1701 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1702 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1705 * Only set the context's Draw/ReadBuffer fields if they're NULL
1706 * or not bound to a user-created FBO.
1708 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1709 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1710 /* Update the FBO's list of drawbuffers/renderbuffers.
1711 * For winsys FBOs this comes from the GL state (which may have
1712 * changed since the last time this FBO was bound).
1714 _mesa_update_draw_buffers(newCtx
);
1716 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1717 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1720 /* XXX only set this flag if we're really changing the draw/read
1721 * framebuffer bindings.
1723 newCtx
->NewState
|= _NEW_BUFFERS
;
1726 _mesa_check_init_viewport(newCtx
,
1727 drawBuffer
->Width
, drawBuffer
->Height
);
1731 if (newCtx
->FirstTimeCurrent
) {
1732 handle_first_current(newCtx
);
1733 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1742 * Make context 'ctx' share the display lists, textures and programs
1743 * that are associated with 'ctxToShare'.
1744 * Any display lists, textures or programs associated with 'ctx' will
1745 * be deleted if nobody else is sharing them.
1748 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1750 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1751 struct gl_shared_state
*oldShared
= NULL
;
1753 /* save ref to old state to prevent it from being deleted immediately */
1754 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1756 /* update ctx's Shared pointer */
1757 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1759 update_default_objects(ctx
);
1761 /* release the old shared state */
1762 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1774 * \return pointer to the current GL context for this thread.
1776 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1777 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1781 _mesa_get_current_context( void )
1783 return (struct gl_context
*) _glapi_get_context();
1788 * Get context's current API dispatch table.
1790 * It'll either be the immediate-mode execute dispatcher or the display list
1791 * compile dispatcher.
1793 * \param ctx GL context.
1795 * \return pointer to dispatch_table.
1797 * Simply returns __struct gl_contextRec::CurrentDispatch.
1799 struct _glapi_table
*
1800 _mesa_get_dispatch(struct gl_context
*ctx
)
1802 return ctx
->CurrentDispatch
;
1808 /**********************************************************************/
1809 /** \name Miscellaneous functions */
1810 /**********************************************************************/
1816 * \param ctx GL context.
1817 * \param error error code.
1819 * Records the given error code and call the driver's dd_function_table::Error
1820 * function if defined.
1823 * This is called via _mesa_error().
1826 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1831 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1832 ctx
->ErrorValue
= error
;
1838 * Flush commands and wait for completion.
1841 _mesa_finish(struct gl_context
*ctx
)
1843 FLUSH_VERTICES( ctx
, 0 );
1844 FLUSH_CURRENT( ctx
, 0 );
1845 if (ctx
->Driver
.Finish
) {
1846 ctx
->Driver
.Finish(ctx
);
1855 _mesa_flush(struct gl_context
*ctx
)
1857 FLUSH_VERTICES( ctx
, 0 );
1858 FLUSH_CURRENT( ctx
, 0 );
1859 if (ctx
->Driver
.Flush
) {
1860 ctx
->Driver
.Flush(ctx
);
1867 * Execute glFinish().
1869 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1870 * dd_function_table::Finish driver callback, if not NULL.
1875 GET_CURRENT_CONTEXT(ctx
);
1876 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1882 * Execute glFlush().
1884 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1885 * dd_function_table::Flush driver callback, if not NULL.
1890 GET_CURRENT_CONTEXT(ctx
);
1891 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1897 * ARB_blend_func_extended - ERRORS section
1898 * "The error INVALID_OPERATION is generated by Begin or any procedure that
1899 * implicitly calls Begin if any draw buffer has a blend function requiring the
1900 * second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, SRC1_ALPHA or
1901 * ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that has more than
1902 * the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active color attachements."
1905 _mesa_check_blend_func_error(struct gl_context
*ctx
)
1908 for (i
= ctx
->Const
.MaxDualSourceDrawBuffers
;
1909 i
< ctx
->DrawBuffer
->_NumColorDrawBuffers
;
1911 if (ctx
->Color
.Blend
[i
]._UsesDualSrc
) {
1912 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1913 "dual source blend on illegal attachment");
1922 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1923 * is called to see if it's valid to render. This involves checking that
1924 * the current shader is valid and the framebuffer is complete.
1925 * It also check the current pipeline object is valid if any.
1926 * If an error is detected it'll be recorded here.
1927 * \return GL_TRUE if OK to render, GL_FALSE if not
1930 _mesa_valid_to_render(struct gl_context
*ctx
, const char *where
)
1932 /* This depends on having up to date derived state (shaders) */
1934 _mesa_update_state(ctx
);
1936 if (ctx
->API
== API_OPENGL_COMPAT
) {
1937 /* Any shader stages that are not supplied by the GLSL shader and have
1938 * assembly shaders enabled must now be validated.
1940 if (!ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
]
1941 && ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1942 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1943 "%s(vertex program not valid)", where
);
1947 if (!ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
]) {
1948 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1949 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1950 "%s(fragment program not valid)", where
);
1954 /* If drawing to integer-valued color buffers, there must be an
1955 * active fragment shader (GL_EXT_texture_integer).
1957 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->_IntegerColor
) {
1958 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1959 "%s(integer format but no fragment shader)", where
);
1965 /* A pipeline object is bound */
1966 if (ctx
->_Shader
->Name
&& !ctx
->_Shader
->Validated
) {
1967 if (!_mesa_validate_program_pipeline(ctx
, ctx
->_Shader
)) {
1968 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1969 "glValidateProgramPipeline failed to validate the "
1975 /* If a program is active and SSO not in use, check if validation of
1976 * samplers succeeded for the active program. */
1977 if (ctx
->_Shader
->ActiveProgram
&& ctx
->_Shader
!= ctx
->Pipeline
.Current
) {
1979 if (!_mesa_sampler_uniforms_are_valid(ctx
->_Shader
->ActiveProgram
,
1981 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", errMsg
);
1986 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
1987 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
1988 "%s(incomplete framebuffer)", where
);
1992 if (_mesa_check_blend_func_error(ctx
) == GL_FALSE
) {
1997 if (ctx
->_Shader
->Flags
& GLSL_LOG
) {
1998 struct gl_shader_program
**shProg
= ctx
->_Shader
->CurrentProgram
;
2001 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2002 if (shProg
[i
] == NULL
|| shProg
[i
]->_Used
2003 || shProg
[i
]->_LinkedShaders
[i
] == NULL
)
2006 /* This is the first time this shader is being used.
2007 * Append shader's constants/uniforms to log file.
2009 * Only log data for the program target that matches the shader
2010 * target. It's possible to have a program bound to the vertex
2011 * shader target that also supplied a fragment shader. If that
2012 * program isn't also bound to the fragment shader target we don't
2013 * want to log its fragment data.
2015 _mesa_append_uniforms_to_file(shProg
[i
]->_LinkedShaders
[i
]);
2018 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2019 if (shProg
[i
] != NULL
)
2020 shProg
[i
]->_Used
= GL_TRUE
;