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 "performance_query.h"
112 #include "pipelineobj.h"
114 #include "pixelstore.h"
117 #include "queryobj.h"
123 #include "shaderobj.h"
124 #include "shaderimage.h"
125 #include "util/disk_cache.h"
126 #include "util/strtod.h"
128 #include "texcompress_s3tc.h"
129 #include "texstate.h"
130 #include "transformfeedback.h"
134 #include "viewport.h"
135 #include "program/program.h"
136 #include "math/m_matrix.h"
137 #include "main/dispatch.h" /* for _gloffset_COUNT */
141 #include "sparc/sparc.h"
144 #include "compiler/glsl_types.h"
145 #include "compiler/glsl/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_remap_table();
412 api_init_mask
|= 1 << ctx
->API
;
414 mtx_unlock(&OneTimeLock
);
419 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
422 _mesa_init_current(struct gl_context
*ctx
)
426 /* Init all to (0,0,0,1) */
427 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
428 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
431 /* redo special cases: */
432 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
433 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
434 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
435 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
436 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
437 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
442 * Init vertex/fragment/geometry program limits.
443 * Important: drivers should override these with actual limits.
446 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
447 struct gl_program_constants
*prog
)
449 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
450 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
451 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
452 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
453 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
454 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
455 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
456 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
459 case MESA_SHADER_VERTEX
:
460 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
461 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
462 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
463 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
464 prog
->MaxInputComponents
= 0; /* value not used */
465 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
467 case MESA_SHADER_FRAGMENT
:
468 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
469 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
470 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
471 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
472 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
473 prog
->MaxOutputComponents
= 0; /* value not used */
475 case MESA_SHADER_TESS_CTRL
:
476 case MESA_SHADER_TESS_EVAL
:
477 case MESA_SHADER_GEOMETRY
:
478 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
479 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
480 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
481 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
482 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
483 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
485 case MESA_SHADER_COMPUTE
:
486 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
487 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
488 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
489 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
490 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
491 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
494 assert(0 && "Bad shader stage in init_program_limits()");
497 /* Set the native limits to zero. This implies that there is no native
498 * support for shaders. Let the drivers fill in the actual values.
500 prog
->MaxNativeInstructions
= 0;
501 prog
->MaxNativeAluInstructions
= 0;
502 prog
->MaxNativeTexInstructions
= 0;
503 prog
->MaxNativeTexIndirections
= 0;
504 prog
->MaxNativeAttribs
= 0;
505 prog
->MaxNativeTemps
= 0;
506 prog
->MaxNativeAddressRegs
= 0;
507 prog
->MaxNativeParameters
= 0;
509 /* Set GLSL datatype range/precision info assuming IEEE float values.
510 * Drivers should override these defaults as needed.
512 prog
->MediumFloat
.RangeMin
= 127;
513 prog
->MediumFloat
.RangeMax
= 127;
514 prog
->MediumFloat
.Precision
= 23;
515 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
517 /* Assume ints are stored as floats for now, since this is the least-common
518 * denominator. The OpenGL ES spec implies (page 132) that the precision
519 * of integer types should be 0. Practically speaking, IEEE
520 * single-precision floating point values can only store integers in the
521 * range [-0x01000000, 0x01000000] without loss of precision.
523 prog
->MediumInt
.RangeMin
= 24;
524 prog
->MediumInt
.RangeMax
= 24;
525 prog
->MediumInt
.Precision
= 0;
526 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
528 prog
->MaxUniformBlocks
= 12;
529 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
530 consts
->MaxUniformBlockSize
/ 4 *
531 prog
->MaxUniformBlocks
);
533 prog
->MaxAtomicBuffers
= 0;
534 prog
->MaxAtomicCounters
= 0;
536 prog
->MaxShaderStorageBlocks
= 8;
541 * Initialize fields of gl_constants (aka ctx->Const.*).
542 * Use defaults from config.h. The device drivers will often override
543 * some of these values (such as number of texture units).
546 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
551 /* Constants, may be overriden (usually only reduced) by device drivers */
552 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
553 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
554 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
555 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
556 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
557 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
558 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
559 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
560 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
561 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
562 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
563 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
564 consts
->MaxTextureBufferSize
= 65536;
565 consts
->TextureBufferOffsetAlignment
= 1;
566 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
567 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
568 consts
->MinPointSize
= MIN_POINT_SIZE
;
569 consts
->MaxPointSize
= MAX_POINT_SIZE
;
570 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
571 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
572 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
573 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
574 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
575 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
576 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
577 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
578 consts
->MaxClipPlanes
= 6;
579 consts
->MaxLights
= MAX_LIGHTS
;
580 consts
->MaxShininess
= 128.0;
581 consts
->MaxSpotExponent
= 128.0;
582 consts
->MaxViewportWidth
= 16384;
583 consts
->MaxViewportHeight
= 16384;
584 consts
->MinMapBufferAlignment
= 64;
586 /* Driver must override these values if ARB_viewport_array is supported. */
587 consts
->MaxViewports
= 1;
588 consts
->ViewportSubpixelBits
= 0;
589 consts
->ViewportBounds
.Min
= 0;
590 consts
->ViewportBounds
.Max
= 0;
592 /** GL_ARB_uniform_buffer_object */
593 consts
->MaxCombinedUniformBlocks
= 36;
594 consts
->MaxUniformBufferBindings
= 36;
595 consts
->MaxUniformBlockSize
= 16384;
596 consts
->UniformBufferOffsetAlignment
= 1;
598 /** GL_ARB_shader_storage_buffer_object */
599 consts
->MaxCombinedShaderStorageBlocks
= 8;
600 consts
->MaxShaderStorageBufferBindings
= 8;
601 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
602 consts
->ShaderStorageBufferOffsetAlignment
= 256;
604 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
605 consts
->MaxUserAssignableUniformLocations
=
606 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
608 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
609 init_program_limits(consts
, i
, &consts
->Program
[i
]);
611 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
612 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
614 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
615 * gl_VertexID is implemented using a native hardware register with OpenGL
618 consts
->VertexID_is_zero_based
= false;
620 /* GL_ARB_draw_buffers */
621 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
623 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
624 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
626 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
627 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
628 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
629 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
630 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
631 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
633 /* Shading language version */
634 consts
->GLSLVersion
= 120;
635 _mesa_override_glsl_version(consts
);
638 consts
->GenerateTemporaryNames
= true;
640 consts
->GenerateTemporaryNames
= false;
643 /* GL_ARB_framebuffer_object */
644 consts
->MaxSamples
= 0;
646 /* GLSL default if NativeIntegers == FALSE */
647 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
650 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
652 /* GL_EXT_provoking_vertex */
653 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
655 /** GL_ARB_viewport_array */
656 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
658 /* GL_EXT_transform_feedback */
659 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
660 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
661 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
662 consts
->MaxVertexStreams
= 1;
665 consts
->ProfileMask
= api
== API_OPENGL_CORE
666 ? GL_CONTEXT_CORE_PROFILE_BIT
667 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
670 consts
->MaxVertexAttribStride
= 2048;
672 /** GL_EXT_gpu_shader4 */
673 consts
->MinProgramTexelOffset
= -8;
674 consts
->MaxProgramTexelOffset
= 7;
676 /* GL_ARB_texture_gather */
677 consts
->MinProgramTextureGatherOffset
= -8;
678 consts
->MaxProgramTextureGatherOffset
= 7;
680 /* GL_ARB_robustness */
681 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
683 /* GL_KHR_robustness */
684 consts
->RobustAccess
= GL_FALSE
;
686 /* ES 3.0 or ARB_ES3_compatibility */
687 consts
->MaxElementIndex
= 0xffffffffu
;
689 /* GL_ARB_texture_multisample */
690 consts
->MaxColorTextureSamples
= 1;
691 consts
->MaxDepthTextureSamples
= 1;
692 consts
->MaxIntegerSamples
= 1;
694 /* GL_ARB_shader_atomic_counters */
695 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
696 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
697 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
698 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
700 /* GL_ARB_vertex_attrib_binding */
701 consts
->MaxVertexAttribRelativeOffset
= 2047;
702 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
704 /* GL_ARB_compute_shader */
705 consts
->MaxComputeWorkGroupCount
[0] = 65535;
706 consts
->MaxComputeWorkGroupCount
[1] = 65535;
707 consts
->MaxComputeWorkGroupCount
[2] = 65535;
708 consts
->MaxComputeWorkGroupSize
[0] = 1024;
709 consts
->MaxComputeWorkGroupSize
[1] = 1024;
710 consts
->MaxComputeWorkGroupSize
[2] = 64;
711 /* Enables compute support for GLES 3.1 if >= 128 */
712 consts
->MaxComputeWorkGroupInvocations
= 0;
714 /** GL_ARB_gpu_shader5 */
715 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
716 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
718 /** GL_KHR_context_flush_control */
719 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
721 /** GL_ARB_tessellation_shader */
722 consts
->MaxTessGenLevel
= MAX_TESS_GEN_LEVEL
;
723 consts
->MaxPatchVertices
= MAX_PATCH_VERTICES
;
724 consts
->Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
725 consts
->Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
726 consts
->MaxTessPatchComponents
= MAX_TESS_PATCH_COMPONENTS
;
727 consts
->MaxTessControlTotalOutputComponents
= MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS
;
728 consts
->PrimitiveRestartForPatches
= false;
730 /** GL_ARB_compute_variable_group_size */
731 consts
->MaxComputeVariableGroupSize
[0] = 512;
732 consts
->MaxComputeVariableGroupSize
[1] = 512;
733 consts
->MaxComputeVariableGroupSize
[2] = 64;
734 consts
->MaxComputeVariableGroupInvocations
= 512;
739 * Do some sanity checks on the limits/constants for the given context.
740 * Only called the first time a context is bound.
743 check_context_limits(struct gl_context
*ctx
)
747 /* check that we don't exceed the size of various bitfields */
748 assert(VARYING_SLOT_MAX
<=
749 (8 * sizeof(ctx
->VertexProgram
._Current
->info
.outputs_written
)));
750 assert(VARYING_SLOT_MAX
<=
751 (8 * sizeof(ctx
->FragmentProgram
._Current
->info
.inputs_read
)));
753 /* shader-related checks */
754 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
755 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
757 /* Texture unit checks */
758 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
759 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
760 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
761 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
762 assert(ctx
->Const
.MaxTextureUnits
> 0);
763 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
764 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
765 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
766 ctx
->Const
.MaxTextureCoordUnits
));
767 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
768 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
769 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
770 /* number of coord units cannot be greater than number of image units */
771 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
774 /* Texture size checks */
775 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
776 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
777 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
778 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
780 /* Texture level checks */
781 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
782 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
784 /* Max texture size should be <= max viewport size (render to texture) */
785 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
786 <= ctx
->Const
.MaxViewportWidth
);
787 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
788 <= ctx
->Const
.MaxViewportHeight
);
790 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
792 /* if this fails, add more enum values to gl_buffer_index */
793 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
795 /* XXX probably add more tests */
800 * Initialize the attribute groups in a GL context.
802 * \param ctx GL context.
804 * Initializes all the attributes, calling the respective <tt>init*</tt>
805 * functions for the more complex data structures.
808 init_attrib_groups(struct gl_context
*ctx
)
813 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
816 _mesa_init_extensions(&ctx
->Extensions
);
818 /* Attribute Groups */
819 _mesa_init_accum( ctx
);
820 _mesa_init_attrib( ctx
);
821 _mesa_init_bbox( ctx
);
822 _mesa_init_buffer_objects( ctx
);
823 _mesa_init_color( ctx
);
824 _mesa_init_current( ctx
);
825 _mesa_init_depth( ctx
);
826 _mesa_init_debug( ctx
);
827 _mesa_init_debug_output( ctx
);
828 _mesa_init_display_list( ctx
);
829 _mesa_init_eval( ctx
);
830 _mesa_init_fbobjects( ctx
);
831 _mesa_init_feedback( ctx
);
832 _mesa_init_fog( ctx
);
833 _mesa_init_hint( ctx
);
834 _mesa_init_image_units( ctx
);
835 _mesa_init_line( ctx
);
836 _mesa_init_lighting( ctx
);
837 _mesa_init_matrix( ctx
);
838 _mesa_init_multisample( ctx
);
839 _mesa_init_performance_monitors( ctx
);
840 _mesa_init_performance_queries( ctx
);
841 _mesa_init_pipeline( ctx
);
842 _mesa_init_pixel( ctx
);
843 _mesa_init_pixelstore( ctx
);
844 _mesa_init_point( ctx
);
845 _mesa_init_polygon( ctx
);
846 _mesa_init_program( ctx
);
847 _mesa_init_queryobj( ctx
);
848 _mesa_init_sync( ctx
);
849 _mesa_init_rastpos( ctx
);
850 _mesa_init_scissor( ctx
);
851 _mesa_init_shader_state( ctx
);
852 _mesa_init_stencil( ctx
);
853 _mesa_init_transform( ctx
);
854 _mesa_init_transform_feedback( ctx
);
855 _mesa_init_varray( ctx
);
856 _mesa_init_viewport( ctx
);
858 if (!_mesa_init_texture( ctx
))
861 _mesa_init_texture_s3tc( ctx
);
864 ctx
->NewState
= _NEW_ALL
;
865 ctx
->NewDriverState
= ~0;
866 ctx
->ErrorValue
= GL_NO_ERROR
;
867 ctx
->ShareGroupReset
= false;
868 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
875 * Update default objects in a GL context with respect to shared state.
877 * \param ctx GL context.
879 * Removes references to old default objects, (texture objects, program
880 * objects, etc.) and changes to reference those from the current shared
884 update_default_objects(struct gl_context
*ctx
)
888 _mesa_update_default_objects_program(ctx
);
889 _mesa_update_default_objects_texture(ctx
);
890 _mesa_update_default_objects_buffer_objects(ctx
);
896 /* XXX this is temporary and should be removed at some point in the
897 * future when there's a reasonable expectation that the libGL library
898 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
899 * functions which were added in Mesa 10.6.
902 /* Avoid libGL / driver ABI break */
903 #define USE_GLAPI_NOP_FEATURES 0
905 #define USE_GLAPI_NOP_FEATURES 1
910 * This function is called by the glapi no-op functions. For each OpenGL
911 * function/entrypoint there's a simple no-op function. These "no-op"
912 * functions call this function.
914 * If there's a current OpenGL context for the calling thread, we record a
915 * GL_INVALID_OPERATION error. This can happen either because the app's
916 * calling an unsupported extension function, or calling an illegal function
917 * (such as glClear between glBegin/glEnd).
919 * If there's no current OpenGL context for the calling thread, we can
920 * print a message to stderr.
922 * \param name the name of the OpenGL function
924 #if USE_GLAPI_NOP_FEATURES
926 nop_handler(const char *name
)
928 GET_CURRENT_CONTEXT(ctx
);
930 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
933 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
935 "GL User Error: gl%s called without a rendering context\n",
945 * Special no-op glFlush, see below.
948 static void GLAPIENTRY
951 /* don't record an error like we do in nop_handler() */
956 #if !USE_GLAPI_NOP_FEATURES
960 GET_CURRENT_CONTEXT(ctx
);
961 _mesa_error(ctx
, GL_INVALID_OPERATION
,
962 "unsupported function called "
963 "(unsupported extension or deprecated function?)");
970 * Create a new API dispatch table in which all entries point to the
971 * generic_nop() function. This will not work on Windows because of
972 * the __stdcall convention which requires the callee to clean up the
973 * call stack. That's impossible with one generic no-op function.
975 struct _glapi_table
*
976 _mesa_new_nop_table(unsigned numEntries
)
978 struct _glapi_table
*table
;
980 #if !USE_GLAPI_NOP_FEATURES
981 table
= malloc(numEntries
* sizeof(_glapi_proc
));
983 _glapi_proc
*entry
= (_glapi_proc
*) table
;
985 for (i
= 0; i
< numEntries
; i
++) {
986 entry
[i
] = (_glapi_proc
) generic_nop
;
990 table
= _glapi_new_nop_table(numEntries
);
997 * Allocate and initialize a new dispatch table. The table will be
998 * populated with pointers to "no-op" functions. In turn, the no-op
999 * functions will call nop_handler() above.
1001 static struct _glapi_table
*
1002 alloc_dispatch_table(void)
1004 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1005 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1006 * Mesa we do this to accommodate different versions of libGL and various
1009 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1011 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1015 /* This is a special case for Windows in the event that
1016 * wglGetProcAddress is called between glBegin/End().
1018 * The MS opengl32.dll library apparently calls glFlush from
1019 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1020 * will dispatch to _mesa_generic_nop() and we'll generate a
1021 * GL_INVALID_OPERATION error.
1023 * The specific case which hits this is piglit's primitive-restart
1024 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1025 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1026 * code will try to resolve the function by calling wglGetProcAddress.
1027 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1028 * will fail causing the test to fail. By suppressing the error, the
1029 * assertion passes and the test continues.
1031 SET_Flush(table
, nop_glFlush
);
1035 #if USE_GLAPI_NOP_FEATURES
1036 _glapi_set_nop_handler(nop_handler
);
1043 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1045 * This ensures that we generate GL_INVALID_OPERATION errors from most
1046 * functions, since the set of functions that are valid within Begin/End is
1049 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1052 * "The only GL commands that are allowed within any Begin/End pairs are
1053 * the commands for specifying vertex coordinates, vertex color, normal
1054 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1055 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1056 * commands for specifying lighting material parameters (Material
1057 * commands see section 2.12.2), display list invocation commands
1058 * (CallList and CallLists see section 5.4), and the EdgeFlag
1059 * command. Executing Begin after Begin has already been executed but
1060 * before an End is issued generates the INVALID OPERATION error, as does
1061 * executing End without a previous corresponding Begin. Executing any
1062 * other GL command within Begin/End results in the error INVALID
1065 * The table entries for specifying vertex attributes are set up by
1066 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1067 * are set by install_vtxfmt() as well.
1069 static struct _glapi_table
*
1070 create_beginend_table(const struct gl_context
*ctx
)
1072 struct _glapi_table
*table
;
1074 table
= alloc_dispatch_table();
1078 /* Fill in functions which return a value, since they should return some
1079 * specific value even if they emit a GL_INVALID_OPERATION error from them
1080 * being called within glBegin()/glEnd().
1082 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1084 COPY_DISPATCH(GenLists
);
1085 COPY_DISPATCH(IsProgram
);
1086 COPY_DISPATCH(IsVertexArray
);
1087 COPY_DISPATCH(IsBuffer
);
1088 COPY_DISPATCH(IsEnabled
);
1089 COPY_DISPATCH(IsEnabledi
);
1090 COPY_DISPATCH(IsRenderbuffer
);
1091 COPY_DISPATCH(IsFramebuffer
);
1092 COPY_DISPATCH(CheckFramebufferStatus
);
1093 COPY_DISPATCH(RenderMode
);
1094 COPY_DISPATCH(GetString
);
1095 COPY_DISPATCH(GetStringi
);
1096 COPY_DISPATCH(GetPointerv
);
1097 COPY_DISPATCH(IsQuery
);
1098 COPY_DISPATCH(IsSampler
);
1099 COPY_DISPATCH(IsSync
);
1100 COPY_DISPATCH(IsTexture
);
1101 COPY_DISPATCH(IsTransformFeedback
);
1102 COPY_DISPATCH(DeleteQueries
);
1103 COPY_DISPATCH(AreTexturesResident
);
1104 COPY_DISPATCH(FenceSync
);
1105 COPY_DISPATCH(ClientWaitSync
);
1106 COPY_DISPATCH(MapBuffer
);
1107 COPY_DISPATCH(UnmapBuffer
);
1108 COPY_DISPATCH(MapBufferRange
);
1109 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1110 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1112 _mesa_loopback_init_api_table(ctx
, table
);
1118 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1120 /* Do the code-generated setup of the exec table in api_exec.c. */
1121 _mesa_initialize_exec_table(ctx
);
1124 _mesa_initialize_save_table(ctx
);
1128 * Initialize a struct gl_context struct (rendering context).
1130 * This includes allocating all the other structs and arrays which hang off of
1131 * the context by pointers.
1132 * Note that the driver needs to pass in its dd_function_table here since
1133 * we need to at least call driverFunctions->NewTextureObject to create the
1134 * default texture objects.
1136 * Called by _mesa_create_context().
1138 * Performs the imports and exports callback tables initialization, and
1139 * miscellaneous one-time initializations. If no shared context is supplied one
1140 * is allocated, and increase its reference count. Setups the GL API dispatch
1141 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1142 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1145 * \param ctx the context to initialize
1146 * \param api the GL API type to create the context for
1147 * \param visual describes the visual attributes for this context or NULL to
1148 * create a configless context
1149 * \param share_list points to context to share textures, display lists,
1151 * \param driverFunctions table of device driver functions for this context
1155 _mesa_initialize_context(struct gl_context
*ctx
,
1157 const struct gl_config
*visual
,
1158 struct gl_context
*share_list
,
1159 const struct dd_function_table
*driverFunctions
)
1161 struct gl_shared_state
*shared
;
1164 assert(driverFunctions
->NewTextureObject
);
1165 assert(driverFunctions
->FreeTextureImageBuffer
);
1168 ctx
->DrawBuffer
= NULL
;
1169 ctx
->ReadBuffer
= NULL
;
1170 ctx
->WinSysDrawBuffer
= NULL
;
1171 ctx
->WinSysReadBuffer
= NULL
;
1174 ctx
->Visual
= *visual
;
1175 ctx
->HasConfig
= GL_TRUE
;
1178 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1179 ctx
->HasConfig
= GL_FALSE
;
1182 _mesa_override_gl_version(ctx
);
1184 /* misc one-time initializations */
1187 /* Plug in driver functions and context pointer here.
1188 * This is important because when we call alloc_shared_state() below
1189 * we'll call ctx->Driver.NewTextureObject() to create the default
1192 ctx
->Driver
= *driverFunctions
;
1195 /* share state with another context */
1196 shared
= share_list
->Shared
;
1199 /* allocate new, unshared state */
1200 shared
= _mesa_alloc_shared_state(ctx
);
1205 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1207 if (!init_attrib_groups( ctx
))
1210 /* setup the API dispatch tables with all nop functions */
1211 ctx
->OutsideBeginEnd
= alloc_dispatch_table();
1212 if (!ctx
->OutsideBeginEnd
)
1214 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1215 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1217 ctx
->FragmentProgram
._MaintainTexEnvProgram
1218 = (getenv("MESA_TEX_PROG") != NULL
);
1220 ctx
->VertexProgram
._MaintainTnlProgram
1221 = (getenv("MESA_TNL_PROG") != NULL
);
1222 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1223 /* this is required... */
1224 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1227 /* Mesa core handles all the formats that mesa core knows about.
1228 * Drivers will want to override this list with just the formats
1229 * they can handle, and confirm that appropriate fallbacks exist in
1230 * _mesa_choose_tex_format().
1232 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1233 sizeof(ctx
->TextureFormatSupported
));
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
);
1280 * Free the data associated with the given context.
1282 * But doesn't free the struct gl_context struct itself.
1284 * \sa _mesa_initialize_context() and init_attrib_groups().
1287 _mesa_free_context_data( struct gl_context
*ctx
)
1289 if (!_mesa_get_current_context()){
1290 /* No current context, but we may need one in order to delete
1291 * texture objs, etc. So temporarily bind the context now.
1293 _mesa_make_current(ctx
, NULL
, NULL
);
1296 /* unreference WinSysDraw/Read buffers */
1297 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1298 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1299 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1300 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1302 _mesa_reference_program(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1303 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1304 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1306 _mesa_reference_program(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1307 _mesa_reference_program(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1308 _mesa_reference_program(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1310 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1311 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1312 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1314 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1315 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1317 _mesa_free_attrib_data(ctx
);
1318 _mesa_free_buffer_objects(ctx
);
1319 _mesa_free_eval_data( ctx
);
1320 _mesa_free_texture_data( ctx
);
1321 _mesa_free_matrix_data( ctx
);
1322 _mesa_free_pipeline_data(ctx
);
1323 _mesa_free_program_data(ctx
);
1324 _mesa_free_shader_state(ctx
);
1325 _mesa_free_queryobj_data(ctx
);
1326 _mesa_free_sync_data(ctx
);
1327 _mesa_free_varray_data(ctx
);
1328 _mesa_free_transform_feedback(ctx
);
1329 _mesa_free_performance_monitors(ctx
);
1330 _mesa_free_performance_queries(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 /* Shared context state (display lists, textures, etc) */
1344 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1346 /* needs to be after freeing shared state */
1347 _mesa_free_display_list_data(ctx
);
1349 _mesa_free_errors_data(ctx
);
1351 free((void *)ctx
->Extensions
.String
);
1353 free(ctx
->VersionString
);
1355 /* unbind the context if it's currently bound */
1356 if (ctx
== _mesa_get_current_context()) {
1357 _mesa_make_current(NULL
, NULL
, NULL
);
1363 * Destroy a struct gl_context structure.
1365 * \param ctx GL context.
1367 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1370 _mesa_destroy_context( struct gl_context
*ctx
)
1373 _mesa_free_context_data(ctx
);
1374 free( (void *) ctx
);
1380 * Copy attribute groups from one context to another.
1382 * \param src source context
1383 * \param dst destination context
1384 * \param mask bitwise OR of GL_*_BIT flags
1386 * According to the bits specified in \p mask, copies the corresponding
1387 * attributes from \p src into \p dst. For many of the attributes a simple \c
1388 * memcpy is not enough due to the existence of internal pointers in their data
1392 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1395 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1397 dst
->Accum
= src
->Accum
;
1399 if (mask
& GL_COLOR_BUFFER_BIT
) {
1401 dst
->Color
= src
->Color
;
1403 if (mask
& GL_CURRENT_BIT
) {
1405 dst
->Current
= src
->Current
;
1407 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1409 dst
->Depth
= src
->Depth
;
1411 if (mask
& GL_ENABLE_BIT
) {
1414 if (mask
& GL_EVAL_BIT
) {
1416 dst
->Eval
= src
->Eval
;
1418 if (mask
& GL_FOG_BIT
) {
1420 dst
->Fog
= src
->Fog
;
1422 if (mask
& GL_HINT_BIT
) {
1424 dst
->Hint
= src
->Hint
;
1426 if (mask
& GL_LIGHTING_BIT
) {
1428 dst
->Light
= src
->Light
;
1430 if (mask
& GL_LINE_BIT
) {
1432 dst
->Line
= src
->Line
;
1434 if (mask
& GL_LIST_BIT
) {
1436 dst
->List
= src
->List
;
1438 if (mask
& GL_PIXEL_MODE_BIT
) {
1440 dst
->Pixel
= src
->Pixel
;
1442 if (mask
& GL_POINT_BIT
) {
1444 dst
->Point
= src
->Point
;
1446 if (mask
& GL_POLYGON_BIT
) {
1448 dst
->Polygon
= src
->Polygon
;
1450 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1451 /* Use loop instead of memcpy due to problem with Portland Group's
1452 * C compiler. Reported by John Stone.
1455 for (i
= 0; i
< 32; i
++) {
1456 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1459 if (mask
& GL_SCISSOR_BIT
) {
1461 dst
->Scissor
= src
->Scissor
;
1463 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1465 dst
->Stencil
= src
->Stencil
;
1467 if (mask
& GL_TEXTURE_BIT
) {
1468 /* Cannot memcpy because of pointers */
1469 _mesa_copy_texture_state(src
, dst
);
1471 if (mask
& GL_TRANSFORM_BIT
) {
1473 dst
->Transform
= src
->Transform
;
1475 if (mask
& GL_VIEWPORT_BIT
) {
1477 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1479 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1483 /* XXX FIXME: Call callbacks?
1485 dst
->NewState
= _NEW_ALL
;
1486 dst
->NewDriverState
= ~0;
1491 * Check if the given context can render into the given framebuffer
1492 * by checking visual attributes.
1494 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1497 check_compatible(const struct gl_context
*ctx
,
1498 const struct gl_framebuffer
*buffer
)
1500 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1501 const struct gl_config
*bufvis
= &buffer
->Visual
;
1503 if (buffer
== _mesa_get_incomplete_framebuffer())
1506 #define check_component(foo) \
1507 if (ctxvis->foo && bufvis->foo && \
1508 ctxvis->foo != bufvis->foo) \
1511 check_component(redMask
);
1512 check_component(greenMask
);
1513 check_component(blueMask
);
1514 check_component(depthBits
);
1515 check_component(stencilBits
);
1517 #undef check_component
1524 * Check if the viewport/scissor size has not yet been initialized.
1525 * Initialize the size if the given width and height are non-zero.
1528 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1530 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1533 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1534 * potential infinite recursion.
1536 ctx
->ViewportInitialized
= GL_TRUE
;
1538 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1539 * yet, so just initialize all of them.
1541 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1542 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1543 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1550 handle_first_current(struct gl_context
*ctx
)
1552 if (ctx
->Version
== 0 || !ctx
->DrawBuffer
) {
1553 /* probably in the process of tearing down the context */
1557 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1559 check_context_limits(ctx
);
1561 /* According to GL_MESA_configless_context the default value of
1562 * glDrawBuffers depends on the config of the first surface it is bound to.
1563 * 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
);