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"
109 #include "multisample.h"
110 #include "performance_monitor.h"
111 #include "pipelineobj.h"
113 #include "pixelstore.h"
116 #include "queryobj.h"
122 #include "shaderobj.h"
123 #include "shaderimage.h"
124 #include "util/disk_cache.h"
125 #include "util/strtod.h"
127 #include "texcompress_s3tc.h"
128 #include "texstate.h"
129 #include "transformfeedback.h"
133 #include "viewport.h"
134 #include "program/program.h"
135 #include "math/m_matrix.h"
136 #include "main/dispatch.h" /* for _gloffset_COUNT */
140 #include "sparc/sparc.h"
143 #include "compiler/glsl_types.h"
144 #include "compiler/glsl/glsl_parser_extras.h"
149 int MESA_VERBOSE
= 0;
152 #ifndef MESA_DEBUG_FLAGS
153 int MESA_DEBUG_FLAGS
= 0;
157 /* ubyte -> float conversion */
158 GLfloat _mesa_ubyte_to_float_color_tab
[256];
163 * Swap buffers notification callback.
165 * \param ctx GL context.
167 * Called by window system just before swapping buffers.
168 * We have to finish any pending rendering.
171 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
173 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
174 _mesa_debug(ctx
, "SwapBuffers\n");
175 FLUSH_CURRENT( ctx
, 0 );
176 if (ctx
->Driver
.Flush
) {
177 ctx
->Driver
.Flush(ctx
);
182 /**********************************************************************/
183 /** \name GL Visual allocation/destruction */
184 /**********************************************************************/
188 * Allocates a struct gl_config structure and initializes it via
189 * _mesa_initialize_visual().
191 * \param dbFlag double buffering
192 * \param stereoFlag stereo buffer
193 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
194 * is acceptable but the actual depth type will be GLushort or GLuint as
196 * \param stencilBits requested minimum bits per stencil buffer value
197 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
198 * of bits per color component in accum buffer.
199 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
200 * \param redBits number of bits per color component in frame buffer for RGB(A)
201 * mode. We always use 8 in core Mesa though.
202 * \param greenBits same as above.
203 * \param blueBits same as above.
204 * \param alphaBits same as above.
205 * \param numSamples not really used.
207 * \return pointer to new struct gl_config or NULL if requested parameters
210 * \note Need to add params for level and numAuxBuffers (at least)
213 _mesa_create_visual( GLboolean dbFlag
,
214 GLboolean stereoFlag
,
222 GLint accumGreenBits
,
224 GLint accumAlphaBits
,
227 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
229 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
230 redBits
, greenBits
, blueBits
, alphaBits
,
231 depthBits
, stencilBits
,
232 accumRedBits
, accumGreenBits
,
233 accumBlueBits
, accumAlphaBits
,
244 * Makes some sanity checks and fills in the fields of the struct
245 * gl_config object with the given parameters. If the caller needs to
246 * set additional fields, he should just probably init the whole
247 * gl_config object himself.
249 * \return GL_TRUE on success, or GL_FALSE on failure.
251 * \sa _mesa_create_visual() above for the parameter description.
254 _mesa_initialize_visual( struct gl_config
*vis
,
256 GLboolean stereoFlag
,
264 GLint accumGreenBits
,
266 GLint accumAlphaBits
,
271 if (depthBits
< 0 || depthBits
> 32) {
274 if (stencilBits
< 0 || stencilBits
> 8) {
277 assert(accumRedBits
>= 0);
278 assert(accumGreenBits
>= 0);
279 assert(accumBlueBits
>= 0);
280 assert(accumAlphaBits
>= 0);
282 vis
->rgbMode
= GL_TRUE
;
283 vis
->doubleBufferMode
= dbFlag
;
284 vis
->stereoMode
= stereoFlag
;
286 vis
->redBits
= redBits
;
287 vis
->greenBits
= greenBits
;
288 vis
->blueBits
= blueBits
;
289 vis
->alphaBits
= alphaBits
;
290 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
293 vis
->depthBits
= depthBits
;
294 vis
->stencilBits
= stencilBits
;
296 vis
->accumRedBits
= accumRedBits
;
297 vis
->accumGreenBits
= accumGreenBits
;
298 vis
->accumBlueBits
= accumBlueBits
;
299 vis
->accumAlphaBits
= accumAlphaBits
;
301 vis
->haveAccumBuffer
= accumRedBits
> 0;
302 vis
->haveDepthBuffer
= depthBits
> 0;
303 vis
->haveStencilBuffer
= stencilBits
> 0;
305 vis
->numAuxBuffers
= 0;
307 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
308 vis
->samples
= numSamples
;
315 * Destroy a visual and free its memory.
319 * Frees the visual structure.
322 _mesa_destroy_visual( struct gl_config
*vis
)
330 /**********************************************************************/
331 /** \name Context allocation, initialization, destroying
333 * The purpose of the most initialization functions here is to provide the
334 * default state values according to the OpenGL specification.
336 /**********************************************************************/
341 * One-time initialization mutex lock.
343 * \sa Used by one_time_init().
345 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
349 * Calls all the various one-time-fini functions in Mesa
355 _mesa_destroy_shader_compiler();
360 * Calls all the various one-time-init functions in Mesa.
362 * While holding a global mutex lock, calls several initialization functions,
363 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
369 one_time_init( struct gl_context
*ctx
)
371 static GLbitfield api_init_mask
= 0x0;
373 mtx_lock(&OneTimeLock
);
375 /* truly one-time init */
376 if (!api_init_mask
) {
379 STATIC_ASSERT(sizeof(GLbyte
) == 1);
380 STATIC_ASSERT(sizeof(GLubyte
) == 1);
381 STATIC_ASSERT(sizeof(GLshort
) == 2);
382 STATIC_ASSERT(sizeof(GLushort
) == 2);
383 STATIC_ASSERT(sizeof(GLint
) == 4);
384 STATIC_ASSERT(sizeof(GLuint
) == 4);
388 _mesa_one_time_init_extension_overrides();
390 _mesa_get_cpu_features();
392 for (i
= 0; i
< 256; i
++) {
393 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
396 atexit(one_time_fini
);
398 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
399 if (MESA_VERBOSE
!= 0) {
400 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
401 PACKAGE_VERSION
, __DATE__
, __TIME__
);
406 /* per-API one-time init */
407 if (!(api_init_mask
& (1 << ctx
->API
))) {
408 _mesa_init_remap_table();
411 api_init_mask
|= 1 << ctx
->API
;
413 mtx_unlock(&OneTimeLock
);
418 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
421 _mesa_init_current(struct gl_context
*ctx
)
425 /* Init all to (0,0,0,1) */
426 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
427 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
430 /* redo special cases: */
431 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
432 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
433 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
434 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
435 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
436 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
441 * Init vertex/fragment/geometry program limits.
442 * Important: drivers should override these with actual limits.
445 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
446 struct gl_program_constants
*prog
)
448 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
449 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
450 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
451 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
452 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
453 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
454 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
455 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
458 case MESA_SHADER_VERTEX
:
459 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
460 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
461 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
462 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
463 prog
->MaxInputComponents
= 0; /* value not used */
464 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
466 case MESA_SHADER_FRAGMENT
:
467 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
468 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
469 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
470 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
471 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
472 prog
->MaxOutputComponents
= 0; /* value not used */
474 case MESA_SHADER_TESS_CTRL
:
475 case MESA_SHADER_TESS_EVAL
:
476 case MESA_SHADER_GEOMETRY
:
477 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
478 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
479 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
480 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
481 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
482 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
484 case MESA_SHADER_COMPUTE
:
485 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
486 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
487 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
488 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
489 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
490 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
493 assert(0 && "Bad shader stage in init_program_limits()");
496 /* Set the native limits to zero. This implies that there is no native
497 * support for shaders. Let the drivers fill in the actual values.
499 prog
->MaxNativeInstructions
= 0;
500 prog
->MaxNativeAluInstructions
= 0;
501 prog
->MaxNativeTexInstructions
= 0;
502 prog
->MaxNativeTexIndirections
= 0;
503 prog
->MaxNativeAttribs
= 0;
504 prog
->MaxNativeTemps
= 0;
505 prog
->MaxNativeAddressRegs
= 0;
506 prog
->MaxNativeParameters
= 0;
508 /* Set GLSL datatype range/precision info assuming IEEE float values.
509 * Drivers should override these defaults as needed.
511 prog
->MediumFloat
.RangeMin
= 127;
512 prog
->MediumFloat
.RangeMax
= 127;
513 prog
->MediumFloat
.Precision
= 23;
514 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
516 /* Assume ints are stored as floats for now, since this is the least-common
517 * denominator. The OpenGL ES spec implies (page 132) that the precision
518 * of integer types should be 0. Practically speaking, IEEE
519 * single-precision floating point values can only store integers in the
520 * range [-0x01000000, 0x01000000] without loss of precision.
522 prog
->MediumInt
.RangeMin
= 24;
523 prog
->MediumInt
.RangeMax
= 24;
524 prog
->MediumInt
.Precision
= 0;
525 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
527 prog
->MaxUniformBlocks
= 12;
528 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
529 consts
->MaxUniformBlockSize
/ 4 *
530 prog
->MaxUniformBlocks
);
532 prog
->MaxAtomicBuffers
= 0;
533 prog
->MaxAtomicCounters
= 0;
535 prog
->MaxShaderStorageBlocks
= 8;
540 * Initialize fields of gl_constants (aka ctx->Const.*).
541 * Use defaults from config.h. The device drivers will often override
542 * some of these values (such as number of texture units).
545 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
550 /* Constants, may be overriden (usually only reduced) by device drivers */
551 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
552 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
553 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
554 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
555 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
556 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
557 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
558 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
559 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
560 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
561 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
562 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
563 consts
->MaxTextureBufferSize
= 65536;
564 consts
->TextureBufferOffsetAlignment
= 1;
565 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
566 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
567 consts
->MinPointSize
= MIN_POINT_SIZE
;
568 consts
->MaxPointSize
= MAX_POINT_SIZE
;
569 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
570 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
571 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
572 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
573 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
574 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
575 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
576 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
577 consts
->MaxClipPlanes
= 6;
578 consts
->MaxLights
= MAX_LIGHTS
;
579 consts
->MaxShininess
= 128.0;
580 consts
->MaxSpotExponent
= 128.0;
581 consts
->MaxViewportWidth
= 16384;
582 consts
->MaxViewportHeight
= 16384;
583 consts
->MinMapBufferAlignment
= 64;
585 /* Driver must override these values if ARB_viewport_array is supported. */
586 consts
->MaxViewports
= 1;
587 consts
->ViewportSubpixelBits
= 0;
588 consts
->ViewportBounds
.Min
= 0;
589 consts
->ViewportBounds
.Max
= 0;
591 /** GL_ARB_uniform_buffer_object */
592 consts
->MaxCombinedUniformBlocks
= 36;
593 consts
->MaxUniformBufferBindings
= 36;
594 consts
->MaxUniformBlockSize
= 16384;
595 consts
->UniformBufferOffsetAlignment
= 1;
597 /** GL_ARB_shader_storage_buffer_object */
598 consts
->MaxCombinedShaderStorageBlocks
= 8;
599 consts
->MaxShaderStorageBufferBindings
= 8;
600 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
601 consts
->ShaderStorageBufferOffsetAlignment
= 256;
603 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
604 consts
->MaxUserAssignableUniformLocations
=
605 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
607 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
608 init_program_limits(consts
, i
, &consts
->Program
[i
]);
610 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
611 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
613 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
614 * gl_VertexID is implemented using a native hardware register with OpenGL
617 consts
->VertexID_is_zero_based
= false;
619 /* GL_ARB_draw_buffers */
620 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
622 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
623 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
625 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
626 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
627 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
628 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
629 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
630 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
632 /* Shading language version */
633 consts
->GLSLVersion
= 120;
634 _mesa_override_glsl_version(consts
);
637 consts
->GenerateTemporaryNames
= true;
639 consts
->GenerateTemporaryNames
= false;
642 /* GL_ARB_framebuffer_object */
643 consts
->MaxSamples
= 0;
645 /* GLSL default if NativeIntegers == FALSE */
646 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
649 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
651 /* GL_EXT_provoking_vertex */
652 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
654 /** GL_ARB_viewport_array */
655 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
657 /* GL_EXT_transform_feedback */
658 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
659 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
660 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
661 consts
->MaxVertexStreams
= 1;
664 consts
->ProfileMask
= api
== API_OPENGL_CORE
665 ? GL_CONTEXT_CORE_PROFILE_BIT
666 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
669 consts
->MaxVertexAttribStride
= 2048;
671 /** GL_EXT_gpu_shader4 */
672 consts
->MinProgramTexelOffset
= -8;
673 consts
->MaxProgramTexelOffset
= 7;
675 /* GL_ARB_texture_gather */
676 consts
->MinProgramTextureGatherOffset
= -8;
677 consts
->MaxProgramTextureGatherOffset
= 7;
679 /* GL_ARB_robustness */
680 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
682 /* GL_KHR_robustness */
683 consts
->RobustAccess
= GL_FALSE
;
685 /* ES 3.0 or ARB_ES3_compatibility */
686 consts
->MaxElementIndex
= 0xffffffffu
;
688 /* GL_ARB_texture_multisample */
689 consts
->MaxColorTextureSamples
= 1;
690 consts
->MaxDepthTextureSamples
= 1;
691 consts
->MaxIntegerSamples
= 1;
693 /* GL_ARB_shader_atomic_counters */
694 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
695 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
696 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
697 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
699 /* GL_ARB_vertex_attrib_binding */
700 consts
->MaxVertexAttribRelativeOffset
= 2047;
701 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
703 /* GL_ARB_compute_shader */
704 consts
->MaxComputeWorkGroupCount
[0] = 65535;
705 consts
->MaxComputeWorkGroupCount
[1] = 65535;
706 consts
->MaxComputeWorkGroupCount
[2] = 65535;
707 consts
->MaxComputeWorkGroupSize
[0] = 1024;
708 consts
->MaxComputeWorkGroupSize
[1] = 1024;
709 consts
->MaxComputeWorkGroupSize
[2] = 64;
710 /* Enables compute support for GLES 3.1 if >= 128 */
711 consts
->MaxComputeWorkGroupInvocations
= 0;
713 /** GL_ARB_gpu_shader5 */
714 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
715 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
717 /** GL_KHR_context_flush_control */
718 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
720 /** GL_ARB_tessellation_shader */
721 consts
->MaxTessGenLevel
= MAX_TESS_GEN_LEVEL
;
722 consts
->MaxPatchVertices
= MAX_PATCH_VERTICES
;
723 consts
->Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
724 consts
->Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
725 consts
->MaxTessPatchComponents
= MAX_TESS_PATCH_COMPONENTS
;
726 consts
->MaxTessControlTotalOutputComponents
= MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS
;
727 consts
->PrimitiveRestartForPatches
= false;
729 /** GL_ARB_compute_variable_group_size */
730 consts
->MaxComputeVariableGroupSize
[0] = 512;
731 consts
->MaxComputeVariableGroupSize
[1] = 512;
732 consts
->MaxComputeVariableGroupSize
[2] = 64;
733 consts
->MaxComputeVariableGroupInvocations
= 512;
738 * Do some sanity checks on the limits/constants for the given context.
739 * Only called the first time a context is bound.
742 check_context_limits(struct gl_context
*ctx
)
746 /* check that we don't exceed the size of various bitfields */
747 assert(VARYING_SLOT_MAX
<=
748 (8 * sizeof(ctx
->VertexProgram
._Current
->info
.outputs_written
)));
749 assert(VARYING_SLOT_MAX
<=
750 (8 * sizeof(ctx
->FragmentProgram
._Current
->info
.inputs_read
)));
752 /* shader-related checks */
753 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
754 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
756 /* Texture unit checks */
757 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
758 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
759 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
760 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
761 assert(ctx
->Const
.MaxTextureUnits
> 0);
762 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
763 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
764 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
765 ctx
->Const
.MaxTextureCoordUnits
));
766 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
767 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
768 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
769 /* number of coord units cannot be greater than number of image units */
770 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
773 /* Texture size checks */
774 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
775 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
776 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
777 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
779 /* Texture level checks */
780 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
781 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
783 /* Max texture size should be <= max viewport size (render to texture) */
784 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
785 <= ctx
->Const
.MaxViewportWidth
);
786 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
787 <= ctx
->Const
.MaxViewportHeight
);
789 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
791 /* if this fails, add more enum values to gl_buffer_index */
792 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
794 /* XXX probably add more tests */
799 * Initialize the attribute groups in a GL context.
801 * \param ctx GL context.
803 * Initializes all the attributes, calling the respective <tt>init*</tt>
804 * functions for the more complex data structures.
807 init_attrib_groups(struct gl_context
*ctx
)
812 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
815 _mesa_init_extensions(&ctx
->Extensions
);
817 /* Attribute Groups */
818 _mesa_init_accum( ctx
);
819 _mesa_init_attrib( ctx
);
820 _mesa_init_bbox( ctx
);
821 _mesa_init_buffer_objects( ctx
);
822 _mesa_init_color( ctx
);
823 _mesa_init_current( ctx
);
824 _mesa_init_depth( ctx
);
825 _mesa_init_debug( ctx
);
826 _mesa_init_debug_output( ctx
);
827 _mesa_init_display_list( ctx
);
828 _mesa_init_eval( ctx
);
829 _mesa_init_fbobjects( ctx
);
830 _mesa_init_feedback( ctx
);
831 _mesa_init_fog( ctx
);
832 _mesa_init_hint( ctx
);
833 _mesa_init_image_units( ctx
);
834 _mesa_init_line( ctx
);
835 _mesa_init_lighting( ctx
);
836 _mesa_init_matrix( ctx
);
837 _mesa_init_multisample( ctx
);
838 _mesa_init_performance_monitors( ctx
);
839 _mesa_init_pipeline( ctx
);
840 _mesa_init_pixel( ctx
);
841 _mesa_init_pixelstore( ctx
);
842 _mesa_init_point( ctx
);
843 _mesa_init_polygon( ctx
);
844 _mesa_init_program( ctx
);
845 _mesa_init_queryobj( ctx
);
846 _mesa_init_sync( ctx
);
847 _mesa_init_rastpos( ctx
);
848 _mesa_init_scissor( ctx
);
849 _mesa_init_shader_state( ctx
);
850 _mesa_init_stencil( ctx
);
851 _mesa_init_transform( ctx
);
852 _mesa_init_transform_feedback( ctx
);
853 _mesa_init_varray( ctx
);
854 _mesa_init_viewport( ctx
);
856 if (!_mesa_init_texture( ctx
))
859 _mesa_init_texture_s3tc( ctx
);
862 ctx
->NewState
= _NEW_ALL
;
863 ctx
->NewDriverState
= ~0;
864 ctx
->ErrorValue
= GL_NO_ERROR
;
865 ctx
->ShareGroupReset
= false;
866 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
873 * Update default objects in a GL context with respect to shared state.
875 * \param ctx GL context.
877 * Removes references to old default objects, (texture objects, program
878 * objects, etc.) and changes to reference those from the current shared
882 update_default_objects(struct gl_context
*ctx
)
886 _mesa_update_default_objects_program(ctx
);
887 _mesa_update_default_objects_texture(ctx
);
888 _mesa_update_default_objects_buffer_objects(ctx
);
894 /* XXX this is temporary and should be removed at some point in the
895 * future when there's a reasonable expectation that the libGL library
896 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
897 * functions which were added in Mesa 10.6.
900 /* Avoid libGL / driver ABI break */
901 #define USE_GLAPI_NOP_FEATURES 0
903 #define USE_GLAPI_NOP_FEATURES 1
908 * This function is called by the glapi no-op functions. For each OpenGL
909 * function/entrypoint there's a simple no-op function. These "no-op"
910 * functions call this function.
912 * If there's a current OpenGL context for the calling thread, we record a
913 * GL_INVALID_OPERATION error. This can happen either because the app's
914 * calling an unsupported extension function, or calling an illegal function
915 * (such as glClear between glBegin/glEnd).
917 * If there's no current OpenGL context for the calling thread, we can
918 * print a message to stderr.
920 * \param name the name of the OpenGL function
922 #if USE_GLAPI_NOP_FEATURES
924 nop_handler(const char *name
)
926 GET_CURRENT_CONTEXT(ctx
);
928 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
931 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
933 "GL User Error: gl%s called without a rendering context\n",
943 * Special no-op glFlush, see below.
946 static void GLAPIENTRY
949 /* don't record an error like we do in nop_handler() */
954 #if !USE_GLAPI_NOP_FEATURES
958 GET_CURRENT_CONTEXT(ctx
);
959 _mesa_error(ctx
, GL_INVALID_OPERATION
,
960 "unsupported function called "
961 "(unsupported extension or deprecated function?)");
968 * Create a new API dispatch table in which all entries point to the
969 * generic_nop() function. This will not work on Windows because of
970 * the __stdcall convention which requires the callee to clean up the
971 * call stack. That's impossible with one generic no-op function.
973 struct _glapi_table
*
974 _mesa_new_nop_table(unsigned numEntries
)
976 struct _glapi_table
*table
;
978 #if !USE_GLAPI_NOP_FEATURES
979 table
= malloc(numEntries
* sizeof(_glapi_proc
));
981 _glapi_proc
*entry
= (_glapi_proc
*) table
;
983 for (i
= 0; i
< numEntries
; i
++) {
984 entry
[i
] = (_glapi_proc
) generic_nop
;
988 table
= _glapi_new_nop_table(numEntries
);
995 * Allocate and initialize a new dispatch table. The table will be
996 * populated with pointers to "no-op" functions. In turn, the no-op
997 * functions will call nop_handler() above.
999 static struct _glapi_table
*
1000 alloc_dispatch_table(void)
1002 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1003 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1004 * Mesa we do this to accommodate different versions of libGL and various
1007 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1009 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1013 /* This is a special case for Windows in the event that
1014 * wglGetProcAddress is called between glBegin/End().
1016 * The MS opengl32.dll library apparently calls glFlush from
1017 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1018 * will dispatch to _mesa_generic_nop() and we'll generate a
1019 * GL_INVALID_OPERATION error.
1021 * The specific case which hits this is piglit's primitive-restart
1022 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1023 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1024 * code will try to resolve the function by calling wglGetProcAddress.
1025 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1026 * will fail causing the test to fail. By suppressing the error, the
1027 * assertion passes and the test continues.
1029 SET_Flush(table
, nop_glFlush
);
1033 #if USE_GLAPI_NOP_FEATURES
1034 _glapi_set_nop_handler(nop_handler
);
1041 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1043 * This ensures that we generate GL_INVALID_OPERATION errors from most
1044 * functions, since the set of functions that are valid within Begin/End is
1047 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1050 * "The only GL commands that are allowed within any Begin/End pairs are
1051 * the commands for specifying vertex coordinates, vertex color, normal
1052 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1053 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1054 * commands for specifying lighting material parameters (Material
1055 * commands see section 2.12.2), display list invocation commands
1056 * (CallList and CallLists see section 5.4), and the EdgeFlag
1057 * command. Executing Begin after Begin has already been executed but
1058 * before an End is issued generates the INVALID OPERATION error, as does
1059 * executing End without a previous corresponding Begin. Executing any
1060 * other GL command within Begin/End results in the error INVALID
1063 * The table entries for specifying vertex attributes are set up by
1064 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1065 * are set by install_vtxfmt() as well.
1067 static struct _glapi_table
*
1068 create_beginend_table(const struct gl_context
*ctx
)
1070 struct _glapi_table
*table
;
1072 table
= alloc_dispatch_table();
1076 /* Fill in functions which return a value, since they should return some
1077 * specific value even if they emit a GL_INVALID_OPERATION error from them
1078 * being called within glBegin()/glEnd().
1080 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1082 COPY_DISPATCH(GenLists
);
1083 COPY_DISPATCH(IsProgram
);
1084 COPY_DISPATCH(IsVertexArray
);
1085 COPY_DISPATCH(IsBuffer
);
1086 COPY_DISPATCH(IsEnabled
);
1087 COPY_DISPATCH(IsEnabledi
);
1088 COPY_DISPATCH(IsRenderbuffer
);
1089 COPY_DISPATCH(IsFramebuffer
);
1090 COPY_DISPATCH(CheckFramebufferStatus
);
1091 COPY_DISPATCH(RenderMode
);
1092 COPY_DISPATCH(GetString
);
1093 COPY_DISPATCH(GetStringi
);
1094 COPY_DISPATCH(GetPointerv
);
1095 COPY_DISPATCH(IsQuery
);
1096 COPY_DISPATCH(IsSampler
);
1097 COPY_DISPATCH(IsSync
);
1098 COPY_DISPATCH(IsTexture
);
1099 COPY_DISPATCH(IsTransformFeedback
);
1100 COPY_DISPATCH(DeleteQueries
);
1101 COPY_DISPATCH(AreTexturesResident
);
1102 COPY_DISPATCH(FenceSync
);
1103 COPY_DISPATCH(ClientWaitSync
);
1104 COPY_DISPATCH(MapBuffer
);
1105 COPY_DISPATCH(UnmapBuffer
);
1106 COPY_DISPATCH(MapBufferRange
);
1107 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1108 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1110 _mesa_loopback_init_api_table(ctx
, table
);
1116 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1118 /* Do the code-generated setup of the exec table in api_exec.c. */
1119 _mesa_initialize_exec_table(ctx
);
1122 _mesa_initialize_save_table(ctx
);
1126 * Initialize a struct gl_context struct (rendering context).
1128 * This includes allocating all the other structs and arrays which hang off of
1129 * the context by pointers.
1130 * Note that the driver needs to pass in its dd_function_table here since
1131 * we need to at least call driverFunctions->NewTextureObject to create the
1132 * default texture objects.
1134 * Called by _mesa_create_context().
1136 * Performs the imports and exports callback tables initialization, and
1137 * miscellaneous one-time initializations. If no shared context is supplied one
1138 * is allocated, and increase its reference count. Setups the GL API dispatch
1139 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1140 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1143 * \param ctx the context to initialize
1144 * \param api the GL API type to create the context for
1145 * \param visual describes the visual attributes for this context or NULL to
1146 * create a configless context
1147 * \param share_list points to context to share textures, display lists,
1149 * \param driverFunctions table of device driver functions for this context
1153 _mesa_initialize_context(struct gl_context
*ctx
,
1155 const struct gl_config
*visual
,
1156 struct gl_context
*share_list
,
1157 const struct dd_function_table
*driverFunctions
)
1159 struct gl_shared_state
*shared
;
1162 assert(driverFunctions
->NewTextureObject
);
1163 assert(driverFunctions
->FreeTextureImageBuffer
);
1166 ctx
->DrawBuffer
= NULL
;
1167 ctx
->ReadBuffer
= NULL
;
1168 ctx
->WinSysDrawBuffer
= NULL
;
1169 ctx
->WinSysReadBuffer
= NULL
;
1172 ctx
->Visual
= *visual
;
1173 ctx
->HasConfig
= GL_TRUE
;
1176 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1177 ctx
->HasConfig
= GL_FALSE
;
1180 _mesa_override_gl_version(ctx
);
1182 /* misc one-time initializations */
1185 /* Plug in driver functions and context pointer here.
1186 * This is important because when we call alloc_shared_state() below
1187 * we'll call ctx->Driver.NewTextureObject() to create the default
1190 ctx
->Driver
= *driverFunctions
;
1193 /* share state with another context */
1194 shared
= share_list
->Shared
;
1197 /* allocate new, unshared state */
1198 shared
= _mesa_alloc_shared_state(ctx
);
1203 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1205 if (!init_attrib_groups( ctx
))
1208 /* setup the API dispatch tables with all nop functions */
1209 ctx
->OutsideBeginEnd
= alloc_dispatch_table();
1210 if (!ctx
->OutsideBeginEnd
)
1212 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1213 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1215 ctx
->FragmentProgram
._MaintainTexEnvProgram
1216 = (getenv("MESA_TEX_PROG") != NULL
);
1218 ctx
->VertexProgram
._MaintainTnlProgram
1219 = (getenv("MESA_TNL_PROG") != NULL
);
1220 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1221 /* this is required... */
1222 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1225 /* Mesa core handles all the formats that mesa core knows about.
1226 * Drivers will want to override this list with just the formats
1227 * they can handle, and confirm that appropriate fallbacks exist in
1228 * _mesa_choose_tex_format().
1230 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1231 sizeof(ctx
->TextureFormatSupported
));
1233 ctx
->Cache
= disk_cache_create();
1236 case API_OPENGL_COMPAT
:
1237 ctx
->BeginEnd
= create_beginend_table(ctx
);
1238 ctx
->Save
= alloc_dispatch_table();
1239 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1243 case API_OPENGL_CORE
:
1247 * GL_OES_texture_cube_map says
1248 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1250 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1251 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1252 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1253 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1254 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1255 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1256 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1257 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1261 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1262 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1266 ctx
->FirstTimeCurrent
= GL_TRUE
;
1271 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1272 free(ctx
->BeginEnd
);
1273 free(ctx
->OutsideBeginEnd
);
1275 ralloc_free(ctx
->Cache
);
1281 * Free the data associated with the given context.
1283 * But doesn't free the struct gl_context struct itself.
1285 * \sa _mesa_initialize_context() and init_attrib_groups().
1288 _mesa_free_context_data( struct gl_context
*ctx
)
1290 if (!_mesa_get_current_context()){
1291 /* No current context, but we may need one in order to delete
1292 * texture objs, etc. So temporarily bind the context now.
1294 _mesa_make_current(ctx
, NULL
, NULL
);
1297 /* unreference WinSysDraw/Read buffers */
1298 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1299 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1300 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1301 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1303 _mesa_reference_program(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1304 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1305 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1307 _mesa_reference_program(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1308 _mesa_reference_program(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1309 _mesa_reference_program(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1311 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1312 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1313 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1315 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1316 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1318 _mesa_free_attrib_data(ctx
);
1319 _mesa_free_buffer_objects(ctx
);
1320 _mesa_free_eval_data( ctx
);
1321 _mesa_free_texture_data( ctx
);
1322 _mesa_free_matrix_data( ctx
);
1323 _mesa_free_pipeline_data(ctx
);
1324 _mesa_free_program_data(ctx
);
1325 _mesa_free_shader_state(ctx
);
1326 _mesa_free_queryobj_data(ctx
);
1327 _mesa_free_sync_data(ctx
);
1328 _mesa_free_varray_data(ctx
);
1329 _mesa_free_transform_feedback(ctx
);
1330 _mesa_free_performance_monitors(ctx
);
1332 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1333 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1334 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1335 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1337 /* free dispatch tables */
1338 free(ctx
->BeginEnd
);
1339 free(ctx
->OutsideBeginEnd
);
1341 free(ctx
->ContextLost
);
1343 ralloc_free(ctx
->Cache
);
1345 /* Shared context state (display lists, textures, etc) */
1346 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1348 /* needs to be after freeing shared state */
1349 _mesa_free_display_list_data(ctx
);
1351 _mesa_free_errors_data(ctx
);
1353 free((void *)ctx
->Extensions
.String
);
1355 free(ctx
->VersionString
);
1357 /* unbind the context if it's currently bound */
1358 if (ctx
== _mesa_get_current_context()) {
1359 _mesa_make_current(NULL
, NULL
, NULL
);
1365 * Destroy a struct gl_context structure.
1367 * \param ctx GL context.
1369 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1372 _mesa_destroy_context( struct gl_context
*ctx
)
1375 _mesa_free_context_data(ctx
);
1376 free( (void *) ctx
);
1382 * Copy attribute groups from one context to another.
1384 * \param src source context
1385 * \param dst destination context
1386 * \param mask bitwise OR of GL_*_BIT flags
1388 * According to the bits specified in \p mask, copies the corresponding
1389 * attributes from \p src into \p dst. For many of the attributes a simple \c
1390 * memcpy is not enough due to the existence of internal pointers in their data
1394 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1397 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1399 dst
->Accum
= src
->Accum
;
1401 if (mask
& GL_COLOR_BUFFER_BIT
) {
1403 dst
->Color
= src
->Color
;
1405 if (mask
& GL_CURRENT_BIT
) {
1407 dst
->Current
= src
->Current
;
1409 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1411 dst
->Depth
= src
->Depth
;
1413 if (mask
& GL_ENABLE_BIT
) {
1416 if (mask
& GL_EVAL_BIT
) {
1418 dst
->Eval
= src
->Eval
;
1420 if (mask
& GL_FOG_BIT
) {
1422 dst
->Fog
= src
->Fog
;
1424 if (mask
& GL_HINT_BIT
) {
1426 dst
->Hint
= src
->Hint
;
1428 if (mask
& GL_LIGHTING_BIT
) {
1430 dst
->Light
= src
->Light
;
1432 if (mask
& GL_LINE_BIT
) {
1434 dst
->Line
= src
->Line
;
1436 if (mask
& GL_LIST_BIT
) {
1438 dst
->List
= src
->List
;
1440 if (mask
& GL_PIXEL_MODE_BIT
) {
1442 dst
->Pixel
= src
->Pixel
;
1444 if (mask
& GL_POINT_BIT
) {
1446 dst
->Point
= src
->Point
;
1448 if (mask
& GL_POLYGON_BIT
) {
1450 dst
->Polygon
= src
->Polygon
;
1452 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1453 /* Use loop instead of memcpy due to problem with Portland Group's
1454 * C compiler. Reported by John Stone.
1457 for (i
= 0; i
< 32; i
++) {
1458 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1461 if (mask
& GL_SCISSOR_BIT
) {
1463 dst
->Scissor
= src
->Scissor
;
1465 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1467 dst
->Stencil
= src
->Stencil
;
1469 if (mask
& GL_TEXTURE_BIT
) {
1470 /* Cannot memcpy because of pointers */
1471 _mesa_copy_texture_state(src
, dst
);
1473 if (mask
& GL_TRANSFORM_BIT
) {
1475 dst
->Transform
= src
->Transform
;
1477 if (mask
& GL_VIEWPORT_BIT
) {
1479 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1481 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1485 /* XXX FIXME: Call callbacks?
1487 dst
->NewState
= _NEW_ALL
;
1488 dst
->NewDriverState
= ~0;
1493 * Check if the given context can render into the given framebuffer
1494 * by checking visual attributes.
1496 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1499 check_compatible(const struct gl_context
*ctx
,
1500 const struct gl_framebuffer
*buffer
)
1502 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1503 const struct gl_config
*bufvis
= &buffer
->Visual
;
1505 if (buffer
== _mesa_get_incomplete_framebuffer())
1508 #define check_component(foo) \
1509 if (ctxvis->foo && bufvis->foo && \
1510 ctxvis->foo != bufvis->foo) \
1513 check_component(redMask
);
1514 check_component(greenMask
);
1515 check_component(blueMask
);
1516 check_component(depthBits
);
1517 check_component(stencilBits
);
1519 #undef check_component
1526 * Check if the viewport/scissor size has not yet been initialized.
1527 * Initialize the size if the given width and height are non-zero.
1530 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1532 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1535 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1536 * potential infinite recursion.
1538 ctx
->ViewportInitialized
= GL_TRUE
;
1540 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1541 * yet, so just initialize all of them.
1543 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1544 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1545 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1551 handle_first_current(struct gl_context
*ctx
)
1553 if (ctx
->Version
== 0) {
1554 /* probably in the process of tearing down the context */
1558 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1560 check_context_limits(ctx
);
1562 /* According to GL_MESA_configless_context the default value of
1563 * glDrawBuffers depends on the config of the first surface it is bound to.
1564 * For GLES it is always GL_BACK which has a magic interpretation */
1565 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1566 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1569 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1574 _mesa_drawbuffers(ctx
, ctx
->DrawBuffer
, 1, &buffer
,
1575 NULL
/* destMask */);
1578 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1579 gl_buffer_index bufferIndex
;
1582 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1584 bufferIndex
= BUFFER_BACK_LEFT
;
1588 bufferIndex
= BUFFER_FRONT_LEFT
;
1591 _mesa_readbuffer(ctx
, ctx
->ReadBuffer
, buffer
, bufferIndex
);
1595 /* We can use this to help debug user's problems. Tell them to set
1596 * the MESA_INFO env variable before running their app. Then the
1597 * first time each context is made current we'll print some useful
1600 if (getenv("MESA_INFO")) {
1601 _mesa_print_info(ctx
);
1606 * Bind the given context to the given drawBuffer and readBuffer and
1607 * make it the current context for the calling thread.
1608 * We'll render into the drawBuffer and read pixels from the
1609 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1611 * We check that the context's and framebuffer's visuals are compatible
1612 * and return immediately if they're not.
1614 * \param newCtx the new GL context. If NULL then there will be no current GL
1616 * \param drawBuffer the drawing framebuffer
1617 * \param readBuffer the reading framebuffer
1620 _mesa_make_current( struct gl_context
*newCtx
,
1621 struct gl_framebuffer
*drawBuffer
,
1622 struct gl_framebuffer
*readBuffer
)
1624 GET_CURRENT_CONTEXT(curCtx
);
1626 if (MESA_VERBOSE
& VERBOSE_API
)
1627 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1629 /* Check that the context's and framebuffer's visuals are compatible.
1631 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1632 if (!check_compatible(newCtx
, drawBuffer
)) {
1633 _mesa_warning(newCtx
,
1634 "MakeCurrent: incompatible visuals for context and drawbuffer");
1638 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1639 if (!check_compatible(newCtx
, readBuffer
)) {
1640 _mesa_warning(newCtx
,
1641 "MakeCurrent: incompatible visuals for context and readbuffer");
1647 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1648 /* make sure this context is valid for flushing */
1650 curCtx
->Const
.ContextReleaseBehavior
==
1651 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
)
1652 _mesa_flush(curCtx
);
1654 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1655 _glapi_set_context((void *) newCtx
);
1656 assert(_mesa_get_current_context() == newCtx
);
1659 _glapi_set_dispatch(NULL
); /* none current */
1661 _mesa_reference_framebuffer(&curCtx
->WinSysDrawBuffer
, NULL
);
1662 _mesa_reference_framebuffer(&curCtx
->WinSysReadBuffer
, NULL
);
1666 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1668 if (drawBuffer
&& readBuffer
) {
1669 assert(_mesa_is_winsys_fbo(drawBuffer
));
1670 assert(_mesa_is_winsys_fbo(readBuffer
));
1671 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1672 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1675 * Only set the context's Draw/ReadBuffer fields if they're NULL
1676 * or not bound to a user-created FBO.
1678 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1679 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1680 /* Update the FBO's list of drawbuffers/renderbuffers.
1681 * For winsys FBOs this comes from the GL state (which may have
1682 * changed since the last time this FBO was bound).
1684 _mesa_update_draw_buffers(newCtx
);
1686 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1687 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1688 /* In _mesa_initialize_window_framebuffer, for single-buffered
1689 * visuals, the ColorReadBuffer is set to be GL_FRONT, even with
1690 * GLES contexts. When calling read_buffer, we verify we are reading
1691 * from GL_BACK in is_legal_es3_readbuffer_enum. But the default is
1692 * incorrect, and certain dEQP tests check this. So fix it here.
1694 if (_mesa_is_gles(newCtx
) &&
1695 !newCtx
->ReadBuffer
->Visual
.doubleBufferMode
)
1696 if (newCtx
->ReadBuffer
->ColorReadBuffer
== GL_FRONT
)
1697 newCtx
->ReadBuffer
->ColorReadBuffer
= GL_BACK
;
1700 /* XXX only set this flag if we're really changing the draw/read
1701 * framebuffer bindings.
1703 newCtx
->NewState
|= _NEW_BUFFERS
;
1705 _mesa_check_init_viewport(newCtx
,
1706 drawBuffer
->Width
, drawBuffer
->Height
);
1709 if (newCtx
->FirstTimeCurrent
) {
1710 handle_first_current(newCtx
);
1711 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1720 * Make context 'ctx' share the display lists, textures and programs
1721 * that are associated with 'ctxToShare'.
1722 * Any display lists, textures or programs associated with 'ctx' will
1723 * be deleted if nobody else is sharing them.
1726 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1728 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1729 struct gl_shared_state
*oldShared
= NULL
;
1731 /* save ref to old state to prevent it from being deleted immediately */
1732 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1734 /* update ctx's Shared pointer */
1735 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1737 update_default_objects(ctx
);
1739 /* release the old shared state */
1740 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1752 * \return pointer to the current GL context for this thread.
1754 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1755 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1759 _mesa_get_current_context( void )
1761 return (struct gl_context
*) _glapi_get_context();
1766 * Get context's current API dispatch table.
1768 * It'll either be the immediate-mode execute dispatcher or the display list
1769 * compile dispatcher.
1771 * \param ctx GL context.
1773 * \return pointer to dispatch_table.
1775 * Simply returns __struct gl_contextRec::CurrentDispatch.
1777 struct _glapi_table
*
1778 _mesa_get_dispatch(struct gl_context
*ctx
)
1780 return ctx
->CurrentDispatch
;
1786 /**********************************************************************/
1787 /** \name Miscellaneous functions */
1788 /**********************************************************************/
1794 * \param ctx GL context.
1795 * \param error error code.
1797 * Records the given error code and call the driver's dd_function_table::Error
1798 * function if defined.
1801 * This is called via _mesa_error().
1804 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1809 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1810 ctx
->ErrorValue
= error
;
1816 * Flush commands and wait for completion.
1819 _mesa_finish(struct gl_context
*ctx
)
1821 FLUSH_VERTICES( ctx
, 0 );
1822 FLUSH_CURRENT( ctx
, 0 );
1823 if (ctx
->Driver
.Finish
) {
1824 ctx
->Driver
.Finish(ctx
);
1833 _mesa_flush(struct gl_context
*ctx
)
1835 FLUSH_VERTICES( ctx
, 0 );
1836 FLUSH_CURRENT( ctx
, 0 );
1837 if (ctx
->Driver
.Flush
) {
1838 ctx
->Driver
.Flush(ctx
);
1845 * Execute glFinish().
1847 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1848 * dd_function_table::Finish driver callback, if not NULL.
1853 GET_CURRENT_CONTEXT(ctx
);
1854 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1860 * Execute glFlush().
1862 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1863 * dd_function_table::Flush driver callback, if not NULL.
1868 GET_CURRENT_CONTEXT(ctx
);
1869 ASSERT_OUTSIDE_BEGIN_END(ctx
);