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"
95 #include "extensions.h"
100 #include "framebuffer.h"
107 #include "multisample.h"
108 #include "performance_monitor.h"
109 #include "pipelineobj.h"
111 #include "pixelstore.h"
114 #include "queryobj.h"
120 #include "shaderobj.h"
121 #include "shaderimage.h"
122 #include "util/simple_list.h"
123 #include "util/strtod.h"
126 #include "texcompress_s3tc.h"
127 #include "texstate.h"
128 #include "transformfeedback.h"
132 #include "viewport.h"
134 #include "program/program.h"
135 #include "program/prog_print.h"
136 #include "math/m_matrix.h"
137 #include "main/dispatch.h" /* for _gloffset_COUNT */
138 #include "uniforms.h"
142 #include "sparc/sparc.h"
145 #include "glsl_parser_extras.h"
150 int MESA_VERBOSE
= 0;
153 #ifndef MESA_DEBUG_FLAGS
154 int MESA_DEBUG_FLAGS
= 0;
158 /* ubyte -> float conversion */
159 GLfloat _mesa_ubyte_to_float_color_tab
[256];
164 * Swap buffers notification callback.
166 * \param ctx GL context.
168 * Called by window system just before swapping buffers.
169 * We have to finish any pending rendering.
172 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
174 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
175 _mesa_debug(ctx
, "SwapBuffers\n");
176 FLUSH_CURRENT( ctx
, 0 );
177 if (ctx
->Driver
.Flush
) {
178 ctx
->Driver
.Flush(ctx
);
183 /**********************************************************************/
184 /** \name GL Visual allocation/destruction */
185 /**********************************************************************/
189 * Allocates a struct gl_config structure and initializes it via
190 * _mesa_initialize_visual().
192 * \param dbFlag double buffering
193 * \param stereoFlag stereo buffer
194 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
195 * is acceptable but the actual depth type will be GLushort or GLuint as
197 * \param stencilBits requested minimum bits per stencil buffer value
198 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
199 * of bits per color component in accum buffer.
200 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
201 * \param redBits number of bits per color component in frame buffer for RGB(A)
202 * mode. We always use 8 in core Mesa though.
203 * \param greenBits same as above.
204 * \param blueBits same as above.
205 * \param alphaBits same as above.
206 * \param numSamples not really used.
208 * \return pointer to new struct gl_config or NULL if requested parameters
211 * \note Need to add params for level and numAuxBuffers (at least)
214 _mesa_create_visual( GLboolean dbFlag
,
215 GLboolean stereoFlag
,
223 GLint accumGreenBits
,
225 GLint accumAlphaBits
,
228 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
230 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
231 redBits
, greenBits
, blueBits
, alphaBits
,
232 depthBits
, stencilBits
,
233 accumRedBits
, accumGreenBits
,
234 accumBlueBits
, accumAlphaBits
,
245 * Makes some sanity checks and fills in the fields of the struct
246 * gl_config object with the given parameters. If the caller needs to
247 * set additional fields, he should just probably init the whole
248 * gl_config object himself.
250 * \return GL_TRUE on success, or GL_FALSE on failure.
252 * \sa _mesa_create_visual() above for the parameter description.
255 _mesa_initialize_visual( struct gl_config
*vis
,
257 GLboolean stereoFlag
,
265 GLint accumGreenBits
,
267 GLint accumAlphaBits
,
272 if (depthBits
< 0 || depthBits
> 32) {
275 if (stencilBits
< 0 || stencilBits
> 8) {
278 assert(accumRedBits
>= 0);
279 assert(accumGreenBits
>= 0);
280 assert(accumBlueBits
>= 0);
281 assert(accumAlphaBits
>= 0);
283 vis
->rgbMode
= GL_TRUE
;
284 vis
->doubleBufferMode
= dbFlag
;
285 vis
->stereoMode
= stereoFlag
;
287 vis
->redBits
= redBits
;
288 vis
->greenBits
= greenBits
;
289 vis
->blueBits
= blueBits
;
290 vis
->alphaBits
= alphaBits
;
291 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
294 vis
->depthBits
= depthBits
;
295 vis
->stencilBits
= stencilBits
;
297 vis
->accumRedBits
= accumRedBits
;
298 vis
->accumGreenBits
= accumGreenBits
;
299 vis
->accumBlueBits
= accumBlueBits
;
300 vis
->accumAlphaBits
= accumAlphaBits
;
302 vis
->haveAccumBuffer
= accumRedBits
> 0;
303 vis
->haveDepthBuffer
= depthBits
> 0;
304 vis
->haveStencilBuffer
= stencilBits
> 0;
306 vis
->numAuxBuffers
= 0;
308 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
309 vis
->samples
= numSamples
;
316 * Destroy a visual and free its memory.
320 * Frees the visual structure.
323 _mesa_destroy_visual( struct gl_config
*vis
)
331 /**********************************************************************/
332 /** \name Context allocation, initialization, destroying
334 * The purpose of the most initialization functions here is to provide the
335 * default state values according to the OpenGL specification.
337 /**********************************************************************/
342 * One-time initialization mutex lock.
344 * \sa Used by one_time_init().
346 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
350 * Calls all the various one-time-fini functions in Mesa
356 _mesa_destroy_shader_compiler();
361 * Calls all the various one-time-init functions in Mesa.
363 * While holding a global mutex lock, calls several initialization functions,
364 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
370 one_time_init( struct gl_context
*ctx
)
372 static GLbitfield api_init_mask
= 0x0;
374 mtx_lock(&OneTimeLock
);
376 /* truly one-time init */
377 if (!api_init_mask
) {
380 STATIC_ASSERT(sizeof(GLbyte
) == 1);
381 STATIC_ASSERT(sizeof(GLubyte
) == 1);
382 STATIC_ASSERT(sizeof(GLshort
) == 2);
383 STATIC_ASSERT(sizeof(GLushort
) == 2);
384 STATIC_ASSERT(sizeof(GLint
) == 4);
385 STATIC_ASSERT(sizeof(GLuint
) == 4);
389 _mesa_one_time_init_extension_overrides();
391 _mesa_get_cpu_features();
393 for (i
= 0; i
< 256; i
++) {
394 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
397 atexit(one_time_fini
);
399 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
400 if (MESA_VERBOSE
!= 0) {
401 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
402 PACKAGE_VERSION
, __DATE__
, __TIME__
);
407 /* per-API one-time init */
408 if (!(api_init_mask
& (1 << ctx
->API
))) {
409 _mesa_init_get_hash(ctx
);
411 _mesa_init_remap_table();
414 api_init_mask
|= 1 << ctx
->API
;
416 mtx_unlock(&OneTimeLock
);
421 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
424 _mesa_init_current(struct gl_context
*ctx
)
428 /* Init all to (0,0,0,1) */
429 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
430 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
433 /* redo special cases: */
434 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
435 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
436 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
437 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
438 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
439 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
444 * Init vertex/fragment/geometry program limits.
445 * Important: drivers should override these with actual limits.
448 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
449 struct gl_program_constants
*prog
)
451 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
452 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
453 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
454 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
455 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
456 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
457 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
458 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
461 case MESA_SHADER_VERTEX
:
462 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
463 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
464 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
465 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
466 prog
->MaxInputComponents
= 0; /* value not used */
467 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
469 case MESA_SHADER_FRAGMENT
:
470 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
471 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
472 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
473 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
474 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
475 prog
->MaxOutputComponents
= 0; /* value not used */
477 case MESA_SHADER_TESS_CTRL
:
478 case MESA_SHADER_TESS_EVAL
:
479 case MESA_SHADER_GEOMETRY
:
480 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
481 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
482 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
483 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
484 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
485 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
487 case MESA_SHADER_COMPUTE
:
488 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
489 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
490 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
491 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
492 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
493 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
496 assert(0 && "Bad shader stage in init_program_limits()");
499 /* Set the native limits to zero. This implies that there is no native
500 * support for shaders. Let the drivers fill in the actual values.
502 prog
->MaxNativeInstructions
= 0;
503 prog
->MaxNativeAluInstructions
= 0;
504 prog
->MaxNativeTexInstructions
= 0;
505 prog
->MaxNativeTexIndirections
= 0;
506 prog
->MaxNativeAttribs
= 0;
507 prog
->MaxNativeTemps
= 0;
508 prog
->MaxNativeAddressRegs
= 0;
509 prog
->MaxNativeParameters
= 0;
511 /* Set GLSL datatype range/precision info assuming IEEE float values.
512 * Drivers should override these defaults as needed.
514 prog
->MediumFloat
.RangeMin
= 127;
515 prog
->MediumFloat
.RangeMax
= 127;
516 prog
->MediumFloat
.Precision
= 23;
517 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
519 /* Assume ints are stored as floats for now, since this is the least-common
520 * denominator. The OpenGL ES spec implies (page 132) that the precision
521 * of integer types should be 0. Practically speaking, IEEE
522 * single-precision floating point values can only store integers in the
523 * range [-0x01000000, 0x01000000] without loss of precision.
525 prog
->MediumInt
.RangeMin
= 24;
526 prog
->MediumInt
.RangeMax
= 24;
527 prog
->MediumInt
.Precision
= 0;
528 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
530 prog
->MaxUniformBlocks
= 12;
531 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
532 consts
->MaxUniformBlockSize
/ 4 *
533 prog
->MaxUniformBlocks
);
535 prog
->MaxAtomicBuffers
= 0;
536 prog
->MaxAtomicCounters
= 0;
538 prog
->MaxShaderStorageBlocks
= 8;
543 * Initialize fields of gl_constants (aka ctx->Const.*).
544 * Use defaults from config.h. The device drivers will often override
545 * some of these values (such as number of texture units).
548 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
553 /* Constants, may be overriden (usually only reduced) by device drivers */
554 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
555 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
556 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
557 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
558 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
559 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
560 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
561 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
562 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
563 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
564 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
565 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
566 consts
->MaxTextureBufferSize
= 65536;
567 consts
->TextureBufferOffsetAlignment
= 1;
568 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
569 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
570 consts
->MinPointSize
= MIN_POINT_SIZE
;
571 consts
->MaxPointSize
= MAX_POINT_SIZE
;
572 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
573 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
574 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
575 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
576 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
577 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
578 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
579 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
580 consts
->MaxClipPlanes
= 6;
581 consts
->MaxLights
= MAX_LIGHTS
;
582 consts
->MaxShininess
= 128.0;
583 consts
->MaxSpotExponent
= 128.0;
584 consts
->MaxViewportWidth
= MAX_VIEWPORT_WIDTH
;
585 consts
->MaxViewportHeight
= MAX_VIEWPORT_HEIGHT
;
586 consts
->MinMapBufferAlignment
= 64;
588 /* Driver must override these values if ARB_viewport_array is supported. */
589 consts
->MaxViewports
= 1;
590 consts
->ViewportSubpixelBits
= 0;
591 consts
->ViewportBounds
.Min
= 0;
592 consts
->ViewportBounds
.Max
= 0;
594 /** GL_ARB_uniform_buffer_object */
595 consts
->MaxCombinedUniformBlocks
= 36;
596 consts
->MaxUniformBufferBindings
= 36;
597 consts
->MaxUniformBlockSize
= 16384;
598 consts
->UniformBufferOffsetAlignment
= 1;
600 /** GL_ARB_shader_storage_buffer_object */
601 consts
->MaxCombinedShaderStorageBlocks
= 8;
602 consts
->MaxShaderStorageBufferBindings
= 8;
603 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
604 consts
->ShaderStorageBufferOffsetAlignment
= 256;
606 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
607 consts
->MaxUserAssignableUniformLocations
=
608 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
610 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
611 init_program_limits(consts
, i
, &consts
->Program
[i
]);
613 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
614 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
616 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
617 * gl_VertexID is implemented using a native hardware register with OpenGL
620 consts
->VertexID_is_zero_based
= false;
622 /* GL_ARB_draw_buffers */
623 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
625 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
626 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
628 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
629 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
630 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
631 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
632 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
633 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
635 /* Shading language version */
636 consts
->GLSLVersion
= 120;
637 _mesa_override_glsl_version(consts
);
640 consts
->GenerateTemporaryNames
= true;
642 consts
->GenerateTemporaryNames
= false;
645 /* GL_ARB_framebuffer_object */
646 consts
->MaxSamples
= 0;
648 /* GLSL default if NativeIntegers == FALSE */
649 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
652 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
654 /* GL_EXT_provoking_vertex */
655 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
657 /** GL_ARB_viewport_array */
658 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
660 /* GL_EXT_transform_feedback */
661 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
662 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
663 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
664 consts
->MaxVertexStreams
= 1;
667 consts
->ProfileMask
= api
== API_OPENGL_CORE
668 ? GL_CONTEXT_CORE_PROFILE_BIT
669 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
672 consts
->MaxVertexAttribStride
= 2048;
674 /** GL_EXT_gpu_shader4 */
675 consts
->MinProgramTexelOffset
= -8;
676 consts
->MaxProgramTexelOffset
= 7;
678 /* GL_ARB_texture_gather */
679 consts
->MinProgramTextureGatherOffset
= -8;
680 consts
->MaxProgramTextureGatherOffset
= 7;
682 /* GL_ARB_robustness */
683 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
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 consts
->MaxComputeWorkGroupInvocations
= 1024;
712 /** GL_ARB_gpu_shader5 */
713 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
714 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
716 /** GL_KHR_context_flush_control */
717 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
719 /** GL_ARB_tessellation_shader */
720 consts
->MaxTessGenLevel
= MAX_TESS_GEN_LEVEL
;
721 consts
->MaxPatchVertices
= MAX_PATCH_VERTICES
;
722 consts
->Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
723 consts
->Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
724 consts
->MaxTessPatchComponents
= MAX_TESS_PATCH_COMPONENTS
;
725 consts
->MaxTessControlTotalOutputComponents
= MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS
;
730 * Do some sanity checks on the limits/constants for the given context.
731 * Only called the first time a context is bound.
734 check_context_limits(struct gl_context
*ctx
)
738 /* check that we don't exceed the size of various bitfields */
739 assert(VARYING_SLOT_MAX
<=
740 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
741 assert(VARYING_SLOT_MAX
<=
742 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
744 /* shader-related checks */
745 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
746 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
748 /* Texture unit checks */
749 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
750 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
751 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
752 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
753 assert(ctx
->Const
.MaxTextureUnits
> 0);
754 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
755 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
756 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
757 ctx
->Const
.MaxTextureCoordUnits
));
758 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
759 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
760 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
761 /* number of coord units cannot be greater than number of image units */
762 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
765 /* Texture size checks */
766 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
767 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
768 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
769 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
771 /* Texture level checks */
772 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
773 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
775 /* Max texture size should be <= max viewport size (render to texture) */
776 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
777 <= ctx
->Const
.MaxViewportWidth
);
778 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
779 <= ctx
->Const
.MaxViewportHeight
);
781 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
783 /* if this fails, add more enum values to gl_buffer_index */
784 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
786 /* XXX probably add more tests */
791 * Initialize the attribute groups in a GL context.
793 * \param ctx GL context.
795 * Initializes all the attributes, calling the respective <tt>init*</tt>
796 * functions for the more complex data structures.
799 init_attrib_groups(struct gl_context
*ctx
)
804 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
807 _mesa_init_extensions(&ctx
->Extensions
);
809 /* Attribute Groups */
810 _mesa_init_accum( ctx
);
811 _mesa_init_attrib( ctx
);
812 _mesa_init_buffer_objects( ctx
);
813 _mesa_init_color( ctx
);
814 _mesa_init_current( ctx
);
815 _mesa_init_depth( ctx
);
816 _mesa_init_debug( ctx
);
817 _mesa_init_display_list( ctx
);
818 _mesa_init_errors( ctx
);
819 _mesa_init_eval( ctx
);
820 _mesa_init_fbobjects( ctx
);
821 _mesa_init_feedback( ctx
);
822 _mesa_init_fog( ctx
);
823 _mesa_init_hint( ctx
);
824 _mesa_init_image_units( ctx
);
825 _mesa_init_line( ctx
);
826 _mesa_init_lighting( ctx
);
827 _mesa_init_matrix( ctx
);
828 _mesa_init_multisample( ctx
);
829 _mesa_init_performance_monitors( ctx
);
830 _mesa_init_pipeline( ctx
);
831 _mesa_init_pixel( ctx
);
832 _mesa_init_pixelstore( ctx
);
833 _mesa_init_point( ctx
);
834 _mesa_init_polygon( ctx
);
835 _mesa_init_program( ctx
);
836 _mesa_init_queryobj( ctx
);
837 _mesa_init_sync( ctx
);
838 _mesa_init_rastpos( ctx
);
839 _mesa_init_scissor( ctx
);
840 _mesa_init_shader_state( ctx
);
841 _mesa_init_stencil( ctx
);
842 _mesa_init_transform( ctx
);
843 _mesa_init_transform_feedback( ctx
);
844 _mesa_init_varray( ctx
);
845 _mesa_init_viewport( ctx
);
847 if (!_mesa_init_texture( ctx
))
850 _mesa_init_texture_s3tc( ctx
);
853 ctx
->NewState
= _NEW_ALL
;
854 ctx
->NewDriverState
= ~0;
855 ctx
->ErrorValue
= GL_NO_ERROR
;
856 ctx
->ShareGroupReset
= false;
857 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
864 * Update default objects in a GL context with respect to shared state.
866 * \param ctx GL context.
868 * Removes references to old default objects, (texture objects, program
869 * objects, etc.) and changes to reference those from the current shared
873 update_default_objects(struct gl_context
*ctx
)
877 _mesa_update_default_objects_program(ctx
);
878 _mesa_update_default_objects_texture(ctx
);
879 _mesa_update_default_objects_buffer_objects(ctx
);
885 /* XXX this is temporary and should be removed at some point in the
886 * future when there's a reasonable expectation that the libGL library
887 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
888 * functions which were added in Mesa 10.6.
891 /* Avoid libGL / driver ABI break */
892 #define USE_GLAPI_NOP_FEATURES 0
894 #define USE_GLAPI_NOP_FEATURES 1
899 * This function is called by the glapi no-op functions. For each OpenGL
900 * function/entrypoint there's a simple no-op function. These "no-op"
901 * functions call this function.
903 * If there's a current OpenGL context for the calling thread, we record a
904 * GL_INVALID_OPERATION error. This can happen either because the app's
905 * calling an unsupported extension function, or calling an illegal function
906 * (such as glClear between glBegin/glEnd).
908 * If there's no current OpenGL context for the calling thread, we can
909 * print a message to stderr.
911 * \param name the name of the OpenGL function
913 #if USE_GLAPI_NOP_FEATURES
915 nop_handler(const char *name
)
917 GET_CURRENT_CONTEXT(ctx
);
919 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
922 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
924 "GL User Error: gl%s called without a rendering context\n",
934 * Special no-op glFlush, see below.
937 static void GLAPIENTRY
940 /* don't record an error like we do in nop_handler() */
945 #if !USE_GLAPI_NOP_FEATURES
949 GET_CURRENT_CONTEXT(ctx
);
950 _mesa_error(ctx
, GL_INVALID_OPERATION
,
951 "unsupported function called "
952 "(unsupported extension or deprecated function?)");
959 * Create a new API dispatch table in which all entries point to the
960 * generic_nop() function. This will not work on Windows because of
961 * the __stdcall convention which requires the callee to clean up the
962 * call stack. That's impossible with one generic no-op function.
964 struct _glapi_table
*
965 _mesa_new_nop_table(unsigned numEntries
)
967 struct _glapi_table
*table
;
969 #if !USE_GLAPI_NOP_FEATURES
970 table
= malloc(numEntries
* sizeof(_glapi_proc
));
972 _glapi_proc
*entry
= (_glapi_proc
*) table
;
974 for (i
= 0; i
< numEntries
; i
++) {
975 entry
[i
] = (_glapi_proc
) generic_nop
;
979 table
= _glapi_new_nop_table(numEntries
);
986 * Allocate and initialize a new dispatch table. The table will be
987 * populated with pointers to "no-op" functions. In turn, the no-op
988 * functions will call nop_handler() above.
990 static struct _glapi_table
*
991 alloc_dispatch_table(void)
993 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
994 * In practice, this'll be the same for stand-alone Mesa. But for DRI
995 * Mesa we do this to accommodate different versions of libGL and various
998 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1000 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1004 /* This is a special case for Windows in the event that
1005 * wglGetProcAddress is called between glBegin/End().
1007 * The MS opengl32.dll library apparently calls glFlush from
1008 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1009 * will dispatch to _mesa_generic_nop() and we'll generate a
1010 * GL_INVALID_OPERATION error.
1012 * The specific case which hits this is piglit's primitive-restart
1013 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1014 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1015 * code will try to resolve the function by calling wglGetProcAddress.
1016 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1017 * will fail causing the test to fail. By suppressing the error, the
1018 * assertion passes and the test continues.
1020 SET_Flush(table
, nop_glFlush
);
1024 #if USE_GLAPI_NOP_FEATURES
1025 _glapi_set_nop_handler(nop_handler
);
1032 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1034 * This ensures that we generate GL_INVALID_OPERATION errors from most
1035 * functions, since the set of functions that are valid within Begin/End is
1038 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1041 * "The only GL commands that are allowed within any Begin/End pairs are
1042 * the commands for specifying vertex coordinates, vertex color, normal
1043 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1044 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1045 * commands for specifying lighting material parameters (Material
1046 * commands see section 2.12.2), display list invocation commands
1047 * (CallList and CallLists see section 5.4), and the EdgeFlag
1048 * command. Executing Begin after Begin has already been executed but
1049 * before an End is issued generates the INVALID OPERATION error, as does
1050 * executing End without a previous corresponding Begin. Executing any
1051 * other GL command within Begin/End results in the error INVALID
1054 * The table entries for specifying vertex attributes are set up by
1055 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1056 * are set by install_vtxfmt() as well.
1058 static struct _glapi_table
*
1059 create_beginend_table(const struct gl_context
*ctx
)
1061 struct _glapi_table
*table
;
1063 table
= alloc_dispatch_table();
1067 /* Fill in functions which return a value, since they should return some
1068 * specific value even if they emit a GL_INVALID_OPERATION error from them
1069 * being called within glBegin()/glEnd().
1071 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1073 COPY_DISPATCH(GenLists
);
1074 COPY_DISPATCH(IsProgram
);
1075 COPY_DISPATCH(IsVertexArray
);
1076 COPY_DISPATCH(IsBuffer
);
1077 COPY_DISPATCH(IsEnabled
);
1078 COPY_DISPATCH(IsEnabledi
);
1079 COPY_DISPATCH(IsRenderbuffer
);
1080 COPY_DISPATCH(IsFramebuffer
);
1081 COPY_DISPATCH(CheckFramebufferStatus
);
1082 COPY_DISPATCH(RenderMode
);
1083 COPY_DISPATCH(GetString
);
1084 COPY_DISPATCH(GetStringi
);
1085 COPY_DISPATCH(GetPointerv
);
1086 COPY_DISPATCH(IsQuery
);
1087 COPY_DISPATCH(IsSampler
);
1088 COPY_DISPATCH(IsSync
);
1089 COPY_DISPATCH(IsTexture
);
1090 COPY_DISPATCH(IsTransformFeedback
);
1091 COPY_DISPATCH(DeleteQueries
);
1092 COPY_DISPATCH(AreTexturesResident
);
1093 COPY_DISPATCH(FenceSync
);
1094 COPY_DISPATCH(ClientWaitSync
);
1095 COPY_DISPATCH(MapBuffer
);
1096 COPY_DISPATCH(UnmapBuffer
);
1097 COPY_DISPATCH(MapBufferRange
);
1098 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1099 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1101 _mesa_loopback_init_api_table(ctx
, table
);
1107 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1109 /* Do the code-generated setup of the exec table in api_exec.c. */
1110 _mesa_initialize_exec_table(ctx
);
1113 _mesa_initialize_save_table(ctx
);
1117 * Initialize a struct gl_context struct (rendering context).
1119 * This includes allocating all the other structs and arrays which hang off of
1120 * the context by pointers.
1121 * Note that the driver needs to pass in its dd_function_table here since
1122 * we need to at least call driverFunctions->NewTextureObject to create the
1123 * default texture objects.
1125 * Called by _mesa_create_context().
1127 * Performs the imports and exports callback tables initialization, and
1128 * miscellaneous one-time initializations. If no shared context is supplied one
1129 * is allocated, and increase its reference count. Setups the GL API dispatch
1130 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1131 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1134 * \param ctx the context to initialize
1135 * \param api the GL API type to create the context for
1136 * \param visual describes the visual attributes for this context or NULL to
1137 * create a configless context
1138 * \param share_list points to context to share textures, display lists,
1140 * \param driverFunctions table of device driver functions for this context
1144 _mesa_initialize_context(struct gl_context
*ctx
,
1146 const struct gl_config
*visual
,
1147 struct gl_context
*share_list
,
1148 const struct dd_function_table
*driverFunctions
)
1150 struct gl_shared_state
*shared
;
1153 assert(driverFunctions
->NewTextureObject
);
1154 assert(driverFunctions
->FreeTextureImageBuffer
);
1157 ctx
->DrawBuffer
= NULL
;
1158 ctx
->ReadBuffer
= NULL
;
1159 ctx
->WinSysDrawBuffer
= NULL
;
1160 ctx
->WinSysReadBuffer
= NULL
;
1163 ctx
->Visual
= *visual
;
1164 ctx
->HasConfig
= GL_TRUE
;
1167 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1168 ctx
->HasConfig
= GL_FALSE
;
1171 _mesa_override_gl_version(ctx
);
1173 /* misc one-time initializations */
1176 /* Plug in driver functions and context pointer here.
1177 * This is important because when we call alloc_shared_state() below
1178 * we'll call ctx->Driver.NewTextureObject() to create the default
1181 ctx
->Driver
= *driverFunctions
;
1184 /* share state with another context */
1185 shared
= share_list
->Shared
;
1188 /* allocate new, unshared state */
1189 shared
= _mesa_alloc_shared_state(ctx
);
1194 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1196 if (!init_attrib_groups( ctx
))
1199 /* setup the API dispatch tables with all nop functions */
1200 ctx
->OutsideBeginEnd
= alloc_dispatch_table();
1201 if (!ctx
->OutsideBeginEnd
)
1203 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1204 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1206 ctx
->FragmentProgram
._MaintainTexEnvProgram
1207 = (getenv("MESA_TEX_PROG") != NULL
);
1209 ctx
->VertexProgram
._MaintainTnlProgram
1210 = (getenv("MESA_TNL_PROG") != NULL
);
1211 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1212 /* this is required... */
1213 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1216 /* Mesa core handles all the formats that mesa core knows about.
1217 * Drivers will want to override this list with just the formats
1218 * they can handle, and confirm that appropriate fallbacks exist in
1219 * _mesa_choose_tex_format().
1221 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1222 sizeof(ctx
->TextureFormatSupported
));
1225 case API_OPENGL_COMPAT
:
1226 ctx
->BeginEnd
= create_beginend_table(ctx
);
1227 ctx
->Save
= alloc_dispatch_table();
1228 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1232 case API_OPENGL_CORE
:
1236 * GL_OES_texture_cube_map says
1237 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1239 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1240 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1241 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1242 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1243 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1244 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1245 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1246 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1250 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1251 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1255 ctx
->FirstTimeCurrent
= GL_TRUE
;
1260 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1261 free(ctx
->BeginEnd
);
1262 free(ctx
->OutsideBeginEnd
);
1269 * Allocate and initialize a struct gl_context structure.
1270 * Note that the driver needs to pass in its dd_function_table here since
1271 * we need to at least call driverFunctions->NewTextureObject to initialize
1272 * the rendering context.
1274 * \param api the GL API type to create the context for
1275 * \param visual a struct gl_config pointer (we copy the struct contents) or
1276 * NULL to create a configless context
1277 * \param share_list another context to share display lists with or NULL
1278 * \param driverFunctions points to the dd_function_table into which the
1279 * driver has plugged in all its special functions.
1281 * \return pointer to a new __struct gl_contextRec or NULL if error.
1284 _mesa_create_context(gl_api api
,
1285 const struct gl_config
*visual
,
1286 struct gl_context
*share_list
,
1287 const struct dd_function_table
*driverFunctions
)
1289 struct gl_context
*ctx
;
1291 ctx
= calloc(1, sizeof(struct gl_context
));
1295 if (_mesa_initialize_context(ctx
, api
, visual
, share_list
,
1307 * Free the data associated with the given context.
1309 * But doesn't free the struct gl_context struct itself.
1311 * \sa _mesa_initialize_context() and init_attrib_groups().
1314 _mesa_free_context_data( struct gl_context
*ctx
)
1316 if (!_mesa_get_current_context()){
1317 /* No current context, but we may need one in order to delete
1318 * texture objs, etc. So temporarily bind the context now.
1320 _mesa_make_current(ctx
, NULL
, NULL
);
1323 /* unreference WinSysDraw/Read buffers */
1324 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1325 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1326 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1327 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1329 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1330 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1331 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1333 _mesa_reference_tesscprog(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1334 _mesa_reference_tesseprog(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1335 _mesa_reference_geomprog(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1337 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1338 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1339 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1341 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1342 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1344 _mesa_free_attrib_data(ctx
);
1345 _mesa_free_buffer_objects(ctx
);
1346 _mesa_free_eval_data( ctx
);
1347 _mesa_free_texture_data( ctx
);
1348 _mesa_free_matrix_data( ctx
);
1349 _mesa_free_pipeline_data(ctx
);
1350 _mesa_free_program_data(ctx
);
1351 _mesa_free_shader_state(ctx
);
1352 _mesa_free_queryobj_data(ctx
);
1353 _mesa_free_sync_data(ctx
);
1354 _mesa_free_varray_data(ctx
);
1355 _mesa_free_transform_feedback(ctx
);
1356 _mesa_free_performance_monitors(ctx
);
1358 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1359 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1360 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1361 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1363 /* free dispatch tables */
1364 free(ctx
->BeginEnd
);
1365 free(ctx
->OutsideBeginEnd
);
1368 /* Shared context state (display lists, textures, etc) */
1369 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1371 /* needs to be after freeing shared state */
1372 _mesa_free_display_list_data(ctx
);
1374 _mesa_free_errors_data(ctx
);
1376 free((void *)ctx
->Extensions
.String
);
1378 free(ctx
->VersionString
);
1380 /* unbind the context if it's currently bound */
1381 if (ctx
== _mesa_get_current_context()) {
1382 _mesa_make_current(NULL
, NULL
, NULL
);
1388 * Destroy a struct gl_context structure.
1390 * \param ctx GL context.
1392 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1395 _mesa_destroy_context( struct gl_context
*ctx
)
1398 _mesa_free_context_data(ctx
);
1399 free( (void *) ctx
);
1405 * Copy attribute groups from one context to another.
1407 * \param src source context
1408 * \param dst destination context
1409 * \param mask bitwise OR of GL_*_BIT flags
1411 * According to the bits specified in \p mask, copies the corresponding
1412 * attributes from \p src into \p dst. For many of the attributes a simple \c
1413 * memcpy is not enough due to the existence of internal pointers in their data
1417 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1420 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1422 dst
->Accum
= src
->Accum
;
1424 if (mask
& GL_COLOR_BUFFER_BIT
) {
1426 dst
->Color
= src
->Color
;
1428 if (mask
& GL_CURRENT_BIT
) {
1430 dst
->Current
= src
->Current
;
1432 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1434 dst
->Depth
= src
->Depth
;
1436 if (mask
& GL_ENABLE_BIT
) {
1439 if (mask
& GL_EVAL_BIT
) {
1441 dst
->Eval
= src
->Eval
;
1443 if (mask
& GL_FOG_BIT
) {
1445 dst
->Fog
= src
->Fog
;
1447 if (mask
& GL_HINT_BIT
) {
1449 dst
->Hint
= src
->Hint
;
1451 if (mask
& GL_LIGHTING_BIT
) {
1453 /* begin with memcpy */
1454 dst
->Light
= src
->Light
;
1455 /* fixup linked lists to prevent pointer insanity */
1456 make_empty_list( &(dst
->Light
.EnabledList
) );
1457 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1458 if (dst
->Light
.Light
[i
].Enabled
) {
1459 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1463 if (mask
& GL_LINE_BIT
) {
1465 dst
->Line
= src
->Line
;
1467 if (mask
& GL_LIST_BIT
) {
1469 dst
->List
= src
->List
;
1471 if (mask
& GL_PIXEL_MODE_BIT
) {
1473 dst
->Pixel
= src
->Pixel
;
1475 if (mask
& GL_POINT_BIT
) {
1477 dst
->Point
= src
->Point
;
1479 if (mask
& GL_POLYGON_BIT
) {
1481 dst
->Polygon
= src
->Polygon
;
1483 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1484 /* Use loop instead of memcpy due to problem with Portland Group's
1485 * C compiler. Reported by John Stone.
1488 for (i
= 0; i
< 32; i
++) {
1489 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1492 if (mask
& GL_SCISSOR_BIT
) {
1494 dst
->Scissor
= src
->Scissor
;
1496 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1498 dst
->Stencil
= src
->Stencil
;
1500 if (mask
& GL_TEXTURE_BIT
) {
1501 /* Cannot memcpy because of pointers */
1502 _mesa_copy_texture_state(src
, dst
);
1504 if (mask
& GL_TRANSFORM_BIT
) {
1506 dst
->Transform
= src
->Transform
;
1508 if (mask
& GL_VIEWPORT_BIT
) {
1510 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1512 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1516 /* XXX FIXME: Call callbacks?
1518 dst
->NewState
= _NEW_ALL
;
1519 dst
->NewDriverState
= ~0;
1524 * Check if the given context can render into the given framebuffer
1525 * by checking visual attributes.
1527 * Most of these tests could go away because Mesa is now pretty flexible
1528 * in terms of mixing rendering contexts with framebuffers. As long
1529 * as RGB vs. CI mode agree, we're probably good.
1531 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1534 check_compatible(const struct gl_context
*ctx
,
1535 const struct gl_framebuffer
*buffer
)
1537 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1538 const struct gl_config
*bufvis
= &buffer
->Visual
;
1540 if (buffer
== _mesa_get_incomplete_framebuffer())
1544 /* disabling this fixes the fgl_glxgears pbuffer demo */
1545 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1548 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1550 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1552 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1554 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1556 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1558 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1560 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1563 /* disabled (see bug 11161) */
1564 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1567 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1575 * Check if the viewport/scissor size has not yet been initialized.
1576 * Initialize the size if the given width and height are non-zero.
1579 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1581 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1584 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1585 * potential infinite recursion.
1587 ctx
->ViewportInitialized
= GL_TRUE
;
1589 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1590 * yet, so just initialize all of them.
1592 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1593 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1594 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1600 handle_first_current(struct gl_context
*ctx
)
1605 if (ctx
->Version
== 0) {
1606 /* probably in the process of tearing down the context */
1610 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1612 check_context_limits(ctx
);
1614 /* According to GL_MESA_configless_context the default value of
1615 * glDrawBuffers depends on the config of the first surface it is bound to.
1616 * For GLES it is always GL_BACK which has a magic interpretation */
1617 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1618 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1619 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1624 _mesa_drawbuffers(ctx
, ctx
->DrawBuffer
, 1, &buffer
,
1625 NULL
/* destMask */);
1628 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1629 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1631 bufferIndex
= BUFFER_BACK_LEFT
;
1635 bufferIndex
= BUFFER_FRONT_LEFT
;
1638 _mesa_readbuffer(ctx
, ctx
->ReadBuffer
, buffer
, bufferIndex
);
1642 /* We can use this to help debug user's problems. Tell them to set
1643 * the MESA_INFO env variable before running their app. Then the
1644 * first time each context is made current we'll print some useful
1647 if (getenv("MESA_INFO")) {
1648 _mesa_print_info(ctx
);
1653 * Bind the given context to the given drawBuffer and readBuffer and
1654 * make it the current context for the calling thread.
1655 * We'll render into the drawBuffer and read pixels from the
1656 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1658 * We check that the context's and framebuffer's visuals are compatible
1659 * and return immediately if they're not.
1661 * \param newCtx the new GL context. If NULL then there will be no current GL
1663 * \param drawBuffer the drawing framebuffer
1664 * \param readBuffer the reading framebuffer
1667 _mesa_make_current( struct gl_context
*newCtx
,
1668 struct gl_framebuffer
*drawBuffer
,
1669 struct gl_framebuffer
*readBuffer
)
1671 GET_CURRENT_CONTEXT(curCtx
);
1673 if (MESA_VERBOSE
& VERBOSE_API
)
1674 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1676 /* Check that the context's and framebuffer's visuals are compatible.
1678 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1679 if (!check_compatible(newCtx
, drawBuffer
)) {
1680 _mesa_warning(newCtx
,
1681 "MakeCurrent: incompatible visuals for context and drawbuffer");
1685 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1686 if (!check_compatible(newCtx
, readBuffer
)) {
1687 _mesa_warning(newCtx
,
1688 "MakeCurrent: incompatible visuals for context and readbuffer");
1694 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1695 /* make sure this context is valid for flushing */
1697 curCtx
->Const
.ContextReleaseBehavior
==
1698 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
)
1699 _mesa_flush(curCtx
);
1701 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1702 _glapi_set_context((void *) newCtx
);
1703 assert(_mesa_get_current_context() == newCtx
);
1706 _glapi_set_dispatch(NULL
); /* none current */
1709 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1711 if (drawBuffer
&& readBuffer
) {
1712 assert(_mesa_is_winsys_fbo(drawBuffer
));
1713 assert(_mesa_is_winsys_fbo(readBuffer
));
1714 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1715 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1718 * Only set the context's Draw/ReadBuffer fields if they're NULL
1719 * or not bound to a user-created FBO.
1721 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1722 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1723 /* Update the FBO's list of drawbuffers/renderbuffers.
1724 * For winsys FBOs this comes from the GL state (which may have
1725 * changed since the last time this FBO was bound).
1727 _mesa_update_draw_buffers(newCtx
);
1729 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1730 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1733 /* XXX only set this flag if we're really changing the draw/read
1734 * framebuffer bindings.
1736 newCtx
->NewState
|= _NEW_BUFFERS
;
1739 _mesa_check_init_viewport(newCtx
,
1740 drawBuffer
->Width
, drawBuffer
->Height
);
1744 if (newCtx
->FirstTimeCurrent
) {
1745 handle_first_current(newCtx
);
1746 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1755 * Make context 'ctx' share the display lists, textures and programs
1756 * that are associated with 'ctxToShare'.
1757 * Any display lists, textures or programs associated with 'ctx' will
1758 * be deleted if nobody else is sharing them.
1761 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1763 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1764 struct gl_shared_state
*oldShared
= NULL
;
1766 /* save ref to old state to prevent it from being deleted immediately */
1767 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1769 /* update ctx's Shared pointer */
1770 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1772 update_default_objects(ctx
);
1774 /* release the old shared state */
1775 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1787 * \return pointer to the current GL context for this thread.
1789 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1790 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1794 _mesa_get_current_context( void )
1796 return (struct gl_context
*) _glapi_get_context();
1801 * Get context's current API dispatch table.
1803 * It'll either be the immediate-mode execute dispatcher or the display list
1804 * compile dispatcher.
1806 * \param ctx GL context.
1808 * \return pointer to dispatch_table.
1810 * Simply returns __struct gl_contextRec::CurrentDispatch.
1812 struct _glapi_table
*
1813 _mesa_get_dispatch(struct gl_context
*ctx
)
1815 return ctx
->CurrentDispatch
;
1821 /**********************************************************************/
1822 /** \name Miscellaneous functions */
1823 /**********************************************************************/
1829 * \param ctx GL context.
1830 * \param error error code.
1832 * Records the given error code and call the driver's dd_function_table::Error
1833 * function if defined.
1836 * This is called via _mesa_error().
1839 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1844 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1845 ctx
->ErrorValue
= error
;
1851 * Flush commands and wait for completion.
1854 _mesa_finish(struct gl_context
*ctx
)
1856 FLUSH_VERTICES( ctx
, 0 );
1857 FLUSH_CURRENT( ctx
, 0 );
1858 if (ctx
->Driver
.Finish
) {
1859 ctx
->Driver
.Finish(ctx
);
1868 _mesa_flush(struct gl_context
*ctx
)
1870 FLUSH_VERTICES( ctx
, 0 );
1871 FLUSH_CURRENT( ctx
, 0 );
1872 if (ctx
->Driver
.Flush
) {
1873 ctx
->Driver
.Flush(ctx
);
1880 * Execute glFinish().
1882 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1883 * dd_function_table::Finish driver callback, if not NULL.
1888 GET_CURRENT_CONTEXT(ctx
);
1889 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1895 * Execute glFlush().
1897 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1898 * dd_function_table::Flush driver callback, if not NULL.
1903 GET_CURRENT_CONTEXT(ctx
);
1904 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1910 * ARB_blend_func_extended - ERRORS section
1911 * "The error INVALID_OPERATION is generated by Begin or any procedure that
1912 * implicitly calls Begin if any draw buffer has a blend function requiring the
1913 * second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, SRC1_ALPHA or
1914 * ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that has more than
1915 * the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active color attachements."
1918 _mesa_check_blend_func_error(struct gl_context
*ctx
)
1921 for (i
= ctx
->Const
.MaxDualSourceDrawBuffers
;
1922 i
< ctx
->DrawBuffer
->_NumColorDrawBuffers
;
1924 if (ctx
->Color
.Blend
[i
]._UsesDualSrc
) {
1925 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1926 "dual source blend on illegal attachment");
1935 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1936 * is called to see if it's valid to render. This involves checking that
1937 * the current shader is valid and the framebuffer is complete.
1938 * It also check the current pipeline object is valid if any.
1939 * If an error is detected it'll be recorded here.
1940 * \return GL_TRUE if OK to render, GL_FALSE if not
1943 _mesa_valid_to_render(struct gl_context
*ctx
, const char *where
)
1945 /* This depends on having up to date derived state (shaders) */
1947 _mesa_update_state(ctx
);
1949 if (ctx
->API
== API_OPENGL_COMPAT
) {
1950 /* Any shader stages that are not supplied by the GLSL shader and have
1951 * assembly shaders enabled must now be validated.
1953 if (!ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
]
1954 && ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1955 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1956 "%s(vertex program not valid)", where
);
1960 if (!ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
]) {
1961 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1962 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1963 "%s(fragment program not valid)", where
);
1967 /* If drawing to integer-valued color buffers, there must be an
1968 * active fragment shader (GL_EXT_texture_integer).
1970 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->_IntegerColor
) {
1971 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1972 "%s(integer format but no fragment shader)", where
);
1978 /* A pipeline object is bound */
1979 if (ctx
->_Shader
->Name
&& !ctx
->_Shader
->Validated
) {
1980 if (!_mesa_validate_program_pipeline(ctx
, ctx
->_Shader
)) {
1981 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1982 "glValidateProgramPipeline failed to validate the "
1988 /* If a program is active and SSO not in use, check if validation of
1989 * samplers succeeded for the active program. */
1990 if (ctx
->_Shader
->ActiveProgram
&& ctx
->_Shader
!= ctx
->Pipeline
.Current
) {
1992 if (!_mesa_sampler_uniforms_are_valid(ctx
->_Shader
->ActiveProgram
,
1994 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", errMsg
);
1999 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
2000 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
2001 "%s(incomplete framebuffer)", where
);
2005 if (_mesa_check_blend_func_error(ctx
) == GL_FALSE
) {
2010 if (ctx
->_Shader
->Flags
& GLSL_LOG
) {
2011 struct gl_shader_program
**shProg
= ctx
->_Shader
->CurrentProgram
;
2014 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2015 if (shProg
[i
] == NULL
|| shProg
[i
]->_Used
2016 || shProg
[i
]->_LinkedShaders
[i
] == NULL
)
2019 /* This is the first time this shader is being used.
2020 * Append shader's constants/uniforms to log file.
2022 * Only log data for the program target that matches the shader
2023 * target. It's possible to have a program bound to the vertex
2024 * shader target that also supplied a fragment shader. If that
2025 * program isn't also bound to the fragment shader target we don't
2026 * want to log its fragment data.
2028 _mesa_append_uniforms_to_file(shProg
[i
]->_LinkedShaders
[i
]);
2031 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2032 if (shProg
[i
] != NULL
)
2033 shProg
[i
]->_Used
= GL_TRUE
;