2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
28 * Mesa context/visual/framebuffer management functions.
33 * \mainpage Mesa Main Module
35 * \section MainIntroduction Introduction
37 * The Mesa Main module consists of all the files in the main/ directory.
38 * Among the features of this module are:
40 * <LI> Structures to represent most GL state </LI>
41 * <LI> State set/get functions </LI>
42 * <LI> Display lists </LI>
43 * <LI> Texture unit, object and image handling </LI>
44 * <LI> Matrix and attribute stacks </LI>
47 * Other modules are responsible for API dispatch, vertex transformation,
48 * point/line/triangle setup, rasterization, vertex array caching,
49 * vertex/fragment programs/shaders, etc.
52 * \section AboutDoxygen About Doxygen
54 * If you're viewing this information as Doxygen-generated HTML you'll
55 * see the documentation index at the top of this page.
57 * The first line lists the Mesa source code modules.
58 * The second line lists the indexes available for viewing the documentation
61 * Selecting the <b>Main page</b> link will display a summary of the module
64 * Selecting <b>Data Structures</b> will list all C structures.
66 * Selecting the <b>File List</b> link will list all the source files in
68 * Selecting a filename will show a list of all functions defined in that file.
70 * Selecting the <b>Data Fields</b> link will display a list of all
71 * documented structure members.
73 * Selecting the <b>Globals</b> link will display a list
74 * of all functions, structures, global variables and macros in the module.
83 #include "api_loopback.h"
89 #include "bufferobj.h"
93 #include "debug_output.h"
97 #include "extensions.h"
102 #include "framebuffer.h"
109 #include "multisample.h"
110 #include "performance_monitor.h"
111 #include "pipelineobj.h"
113 #include "pixelstore.h"
116 #include "queryobj.h"
122 #include "shaderobj.h"
123 #include "shaderimage.h"
124 #include "util/strtod.h"
126 #include "texcompress_s3tc.h"
127 #include "texstate.h"
128 #include "transformfeedback.h"
132 #include "viewport.h"
133 #include "program/program.h"
134 #include "math/m_matrix.h"
135 #include "main/dispatch.h" /* for _gloffset_COUNT */
139 #include "sparc/sparc.h"
142 #include "compiler/glsl_types.h"
143 #include "compiler/glsl/glsl_parser_extras.h"
148 int MESA_VERBOSE
= 0;
151 #ifndef MESA_DEBUG_FLAGS
152 int MESA_DEBUG_FLAGS
= 0;
156 /* ubyte -> float conversion */
157 GLfloat _mesa_ubyte_to_float_color_tab
[256];
162 * Swap buffers notification callback.
164 * \param ctx GL context.
166 * Called by window system just before swapping buffers.
167 * We have to finish any pending rendering.
170 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
172 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
173 _mesa_debug(ctx
, "SwapBuffers\n");
174 FLUSH_CURRENT( ctx
, 0 );
175 if (ctx
->Driver
.Flush
) {
176 ctx
->Driver
.Flush(ctx
);
181 /**********************************************************************/
182 /** \name GL Visual allocation/destruction */
183 /**********************************************************************/
187 * Allocates a struct gl_config structure and initializes it via
188 * _mesa_initialize_visual().
190 * \param dbFlag double buffering
191 * \param stereoFlag stereo buffer
192 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
193 * is acceptable but the actual depth type will be GLushort or GLuint as
195 * \param stencilBits requested minimum bits per stencil buffer value
196 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
197 * of bits per color component in accum buffer.
198 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
199 * \param redBits number of bits per color component in frame buffer for RGB(A)
200 * mode. We always use 8 in core Mesa though.
201 * \param greenBits same as above.
202 * \param blueBits same as above.
203 * \param alphaBits same as above.
204 * \param numSamples not really used.
206 * \return pointer to new struct gl_config or NULL if requested parameters
209 * \note Need to add params for level and numAuxBuffers (at least)
212 _mesa_create_visual( GLboolean dbFlag
,
213 GLboolean stereoFlag
,
221 GLint accumGreenBits
,
223 GLint accumAlphaBits
,
226 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
228 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
229 redBits
, greenBits
, blueBits
, alphaBits
,
230 depthBits
, stencilBits
,
231 accumRedBits
, accumGreenBits
,
232 accumBlueBits
, accumAlphaBits
,
243 * Makes some sanity checks and fills in the fields of the struct
244 * gl_config object with the given parameters. If the caller needs to
245 * set additional fields, he should just probably init the whole
246 * gl_config object himself.
248 * \return GL_TRUE on success, or GL_FALSE on failure.
250 * \sa _mesa_create_visual() above for the parameter description.
253 _mesa_initialize_visual( struct gl_config
*vis
,
255 GLboolean stereoFlag
,
263 GLint accumGreenBits
,
265 GLint accumAlphaBits
,
270 if (depthBits
< 0 || depthBits
> 32) {
273 if (stencilBits
< 0 || stencilBits
> 8) {
276 assert(accumRedBits
>= 0);
277 assert(accumGreenBits
>= 0);
278 assert(accumBlueBits
>= 0);
279 assert(accumAlphaBits
>= 0);
281 vis
->rgbMode
= GL_TRUE
;
282 vis
->doubleBufferMode
= dbFlag
;
283 vis
->stereoMode
= stereoFlag
;
285 vis
->redBits
= redBits
;
286 vis
->greenBits
= greenBits
;
287 vis
->blueBits
= blueBits
;
288 vis
->alphaBits
= alphaBits
;
289 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
292 vis
->depthBits
= depthBits
;
293 vis
->stencilBits
= stencilBits
;
295 vis
->accumRedBits
= accumRedBits
;
296 vis
->accumGreenBits
= accumGreenBits
;
297 vis
->accumBlueBits
= accumBlueBits
;
298 vis
->accumAlphaBits
= accumAlphaBits
;
300 vis
->haveAccumBuffer
= accumRedBits
> 0;
301 vis
->haveDepthBuffer
= depthBits
> 0;
302 vis
->haveStencilBuffer
= stencilBits
> 0;
304 vis
->numAuxBuffers
= 0;
306 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
307 vis
->samples
= numSamples
;
314 * Destroy a visual and free its memory.
318 * Frees the visual structure.
321 _mesa_destroy_visual( struct gl_config
*vis
)
329 /**********************************************************************/
330 /** \name Context allocation, initialization, destroying
332 * The purpose of the most initialization functions here is to provide the
333 * default state values according to the OpenGL specification.
335 /**********************************************************************/
340 * One-time initialization mutex lock.
342 * \sa Used by one_time_init().
344 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
348 * Calls all the various one-time-fini functions in Mesa
354 _mesa_destroy_shader_compiler();
359 * Calls all the various one-time-init functions in Mesa.
361 * While holding a global mutex lock, calls several initialization functions,
362 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
368 one_time_init( struct gl_context
*ctx
)
370 static GLbitfield api_init_mask
= 0x0;
372 mtx_lock(&OneTimeLock
);
374 /* truly one-time init */
375 if (!api_init_mask
) {
378 STATIC_ASSERT(sizeof(GLbyte
) == 1);
379 STATIC_ASSERT(sizeof(GLubyte
) == 1);
380 STATIC_ASSERT(sizeof(GLshort
) == 2);
381 STATIC_ASSERT(sizeof(GLushort
) == 2);
382 STATIC_ASSERT(sizeof(GLint
) == 4);
383 STATIC_ASSERT(sizeof(GLuint
) == 4);
387 _mesa_one_time_init_extension_overrides();
389 _mesa_get_cpu_features();
391 for (i
= 0; i
< 256; i
++) {
392 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
395 atexit(one_time_fini
);
397 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
398 if (MESA_VERBOSE
!= 0) {
399 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
400 PACKAGE_VERSION
, __DATE__
, __TIME__
);
405 /* per-API one-time init */
406 if (!(api_init_mask
& (1 << ctx
->API
))) {
407 _mesa_init_remap_table();
410 api_init_mask
|= 1 << ctx
->API
;
412 mtx_unlock(&OneTimeLock
);
417 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
420 _mesa_init_current(struct gl_context
*ctx
)
424 /* Init all to (0,0,0,1) */
425 for (i
= 0; i
< ARRAY_SIZE(ctx
->Current
.Attrib
); i
++) {
426 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
429 /* redo special cases: */
430 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
431 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
432 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
433 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
434 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
435 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
440 * Init vertex/fragment/geometry program limits.
441 * Important: drivers should override these with actual limits.
444 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
445 struct gl_program_constants
*prog
)
447 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
448 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
449 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
450 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
451 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
452 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
453 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
454 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
457 case MESA_SHADER_VERTEX
:
458 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
459 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
460 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
461 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
462 prog
->MaxInputComponents
= 0; /* value not used */
463 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
465 case MESA_SHADER_FRAGMENT
:
466 prog
->MaxParameters
= MAX_FRAGMENT_PROGRAM_PARAMS
;
467 prog
->MaxAttribs
= MAX_FRAGMENT_PROGRAM_INPUTS
;
468 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
469 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
470 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
471 prog
->MaxOutputComponents
= 0; /* value not used */
473 case MESA_SHADER_TESS_CTRL
:
474 case MESA_SHADER_TESS_EVAL
:
475 case MESA_SHADER_GEOMETRY
:
476 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
477 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
478 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
479 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
480 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
481 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
483 case MESA_SHADER_COMPUTE
:
484 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
485 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
486 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
487 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
488 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
489 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
492 assert(0 && "Bad shader stage in init_program_limits()");
495 /* Set the native limits to zero. This implies that there is no native
496 * support for shaders. Let the drivers fill in the actual values.
498 prog
->MaxNativeInstructions
= 0;
499 prog
->MaxNativeAluInstructions
= 0;
500 prog
->MaxNativeTexInstructions
= 0;
501 prog
->MaxNativeTexIndirections
= 0;
502 prog
->MaxNativeAttribs
= 0;
503 prog
->MaxNativeTemps
= 0;
504 prog
->MaxNativeAddressRegs
= 0;
505 prog
->MaxNativeParameters
= 0;
507 /* Set GLSL datatype range/precision info assuming IEEE float values.
508 * Drivers should override these defaults as needed.
510 prog
->MediumFloat
.RangeMin
= 127;
511 prog
->MediumFloat
.RangeMax
= 127;
512 prog
->MediumFloat
.Precision
= 23;
513 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
515 /* Assume ints are stored as floats for now, since this is the least-common
516 * denominator. The OpenGL ES spec implies (page 132) that the precision
517 * of integer types should be 0. Practically speaking, IEEE
518 * single-precision floating point values can only store integers in the
519 * range [-0x01000000, 0x01000000] without loss of precision.
521 prog
->MediumInt
.RangeMin
= 24;
522 prog
->MediumInt
.RangeMax
= 24;
523 prog
->MediumInt
.Precision
= 0;
524 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
526 prog
->MaxUniformBlocks
= 12;
527 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
528 consts
->MaxUniformBlockSize
/ 4 *
529 prog
->MaxUniformBlocks
);
531 prog
->MaxAtomicBuffers
= 0;
532 prog
->MaxAtomicCounters
= 0;
534 prog
->MaxShaderStorageBlocks
= 8;
539 * Initialize fields of gl_constants (aka ctx->Const.*).
540 * Use defaults from config.h. The device drivers will often override
541 * some of these values (such as number of texture units).
544 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
549 /* Constants, may be overriden (usually only reduced) by device drivers */
550 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
551 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
552 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
553 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
554 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
555 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
556 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
557 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
558 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
559 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
560 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
561 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
562 consts
->MaxTextureBufferSize
= 65536;
563 consts
->TextureBufferOffsetAlignment
= 1;
564 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
565 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
566 consts
->MinPointSize
= MIN_POINT_SIZE
;
567 consts
->MaxPointSize
= MAX_POINT_SIZE
;
568 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
569 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
570 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
571 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
572 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
573 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
574 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
575 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
576 consts
->MaxClipPlanes
= 6;
577 consts
->MaxLights
= MAX_LIGHTS
;
578 consts
->MaxShininess
= 128.0;
579 consts
->MaxSpotExponent
= 128.0;
580 consts
->MaxViewportWidth
= 16384;
581 consts
->MaxViewportHeight
= 16384;
582 consts
->MinMapBufferAlignment
= 64;
584 /* Driver must override these values if ARB_viewport_array is supported. */
585 consts
->MaxViewports
= 1;
586 consts
->ViewportSubpixelBits
= 0;
587 consts
->ViewportBounds
.Min
= 0;
588 consts
->ViewportBounds
.Max
= 0;
590 /** GL_ARB_uniform_buffer_object */
591 consts
->MaxCombinedUniformBlocks
= 36;
592 consts
->MaxUniformBufferBindings
= 36;
593 consts
->MaxUniformBlockSize
= 16384;
594 consts
->UniformBufferOffsetAlignment
= 1;
596 /** GL_ARB_shader_storage_buffer_object */
597 consts
->MaxCombinedShaderStorageBlocks
= 8;
598 consts
->MaxShaderStorageBufferBindings
= 8;
599 consts
->MaxShaderStorageBlockSize
= 128 * 1024 * 1024; /* 2^27 */
600 consts
->ShaderStorageBufferOffsetAlignment
= 256;
602 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
603 consts
->MaxUserAssignableUniformLocations
=
604 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
606 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
607 init_program_limits(consts
, i
, &consts
->Program
[i
]);
609 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
610 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
612 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
613 * gl_VertexID is implemented using a native hardware register with OpenGL
616 consts
->VertexID_is_zero_based
= false;
618 /* GL_ARB_draw_buffers */
619 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
621 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
622 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
624 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
625 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
626 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
627 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
628 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
629 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
631 /* Shading language version */
632 consts
->GLSLVersion
= 120;
633 _mesa_override_glsl_version(consts
);
636 consts
->GenerateTemporaryNames
= true;
638 consts
->GenerateTemporaryNames
= false;
641 /* GL_ARB_framebuffer_object */
642 consts
->MaxSamples
= 0;
644 /* GLSL default if NativeIntegers == FALSE */
645 consts
->UniformBooleanTrue
= FLOAT_AS_UNION(1.0f
).u
;
648 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
650 /* GL_EXT_provoking_vertex */
651 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
653 /** GL_ARB_viewport_array */
654 consts
->LayerAndVPIndexProvokingVertex
= GL_UNDEFINED_VERTEX
;
656 /* GL_EXT_transform_feedback */
657 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
658 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
659 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
660 consts
->MaxVertexStreams
= 1;
663 consts
->ProfileMask
= api
== API_OPENGL_CORE
664 ? GL_CONTEXT_CORE_PROFILE_BIT
665 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
668 consts
->MaxVertexAttribStride
= 2048;
670 /** GL_EXT_gpu_shader4 */
671 consts
->MinProgramTexelOffset
= -8;
672 consts
->MaxProgramTexelOffset
= 7;
674 /* GL_ARB_texture_gather */
675 consts
->MinProgramTextureGatherOffset
= -8;
676 consts
->MaxProgramTextureGatherOffset
= 7;
678 /* GL_ARB_robustness */
679 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
681 /* GL_KHR_robustness */
682 consts
->RobustAccess
= GL_FALSE
;
684 /* ES 3.0 or ARB_ES3_compatibility */
685 consts
->MaxElementIndex
= 0xffffffffu
;
687 /* GL_ARB_texture_multisample */
688 consts
->MaxColorTextureSamples
= 1;
689 consts
->MaxDepthTextureSamples
= 1;
690 consts
->MaxIntegerSamples
= 1;
692 /* GL_ARB_shader_atomic_counters */
693 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
694 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
695 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
696 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
698 /* GL_ARB_vertex_attrib_binding */
699 consts
->MaxVertexAttribRelativeOffset
= 2047;
700 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
702 /* GL_ARB_compute_shader */
703 consts
->MaxComputeWorkGroupCount
[0] = 65535;
704 consts
->MaxComputeWorkGroupCount
[1] = 65535;
705 consts
->MaxComputeWorkGroupCount
[2] = 65535;
706 consts
->MaxComputeWorkGroupSize
[0] = 1024;
707 consts
->MaxComputeWorkGroupSize
[1] = 1024;
708 consts
->MaxComputeWorkGroupSize
[2] = 64;
709 /* Enables compute support for GLES 3.1 if >= 128 */
710 consts
->MaxComputeWorkGroupInvocations
= 0;
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
;
726 consts
->PrimitiveRestartForPatches
= false;
728 /** GL_ARB_compute_variable_group_size */
729 consts
->MaxComputeVariableGroupSize
[0] = 512;
730 consts
->MaxComputeVariableGroupSize
[1] = 512;
731 consts
->MaxComputeVariableGroupSize
[2] = 64;
732 consts
->MaxComputeVariableGroupInvocations
= 512;
737 * Do some sanity checks on the limits/constants for the given context.
738 * Only called the first time a context is bound.
741 check_context_limits(struct gl_context
*ctx
)
745 /* check that we don't exceed the size of various bitfields */
746 assert(VARYING_SLOT_MAX
<=
747 (8 * sizeof(ctx
->VertexProgram
._Current
->info
.outputs_written
)));
748 assert(VARYING_SLOT_MAX
<=
749 (8 * sizeof(ctx
->FragmentProgram
._Current
->info
.inputs_read
)));
751 /* shader-related checks */
752 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
753 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
755 /* Texture unit checks */
756 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
757 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
758 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
759 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
760 assert(ctx
->Const
.MaxTextureUnits
> 0);
761 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
762 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
763 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
764 ctx
->Const
.MaxTextureCoordUnits
));
765 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
766 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
767 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
768 /* number of coord units cannot be greater than number of image units */
769 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
772 /* Texture size checks */
773 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
774 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
775 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
776 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
778 /* Texture level checks */
779 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
780 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
782 /* Max texture size should be <= max viewport size (render to texture) */
783 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
784 <= ctx
->Const
.MaxViewportWidth
);
785 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
786 <= ctx
->Const
.MaxViewportHeight
);
788 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
790 /* if this fails, add more enum values to gl_buffer_index */
791 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
793 /* XXX probably add more tests */
798 * Initialize the attribute groups in a GL context.
800 * \param ctx GL context.
802 * Initializes all the attributes, calling the respective <tt>init*</tt>
803 * functions for the more complex data structures.
806 init_attrib_groups(struct gl_context
*ctx
)
811 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
814 _mesa_init_extensions(&ctx
->Extensions
);
816 /* Attribute Groups */
817 _mesa_init_accum( ctx
);
818 _mesa_init_attrib( ctx
);
819 _mesa_init_bbox( ctx
);
820 _mesa_init_buffer_objects( ctx
);
821 _mesa_init_color( ctx
);
822 _mesa_init_current( ctx
);
823 _mesa_init_depth( ctx
);
824 _mesa_init_debug( ctx
);
825 _mesa_init_debug_output( ctx
);
826 _mesa_init_display_list( ctx
);
827 _mesa_init_eval( ctx
);
828 _mesa_init_fbobjects( ctx
);
829 _mesa_init_feedback( ctx
);
830 _mesa_init_fog( ctx
);
831 _mesa_init_hint( ctx
);
832 _mesa_init_image_units( ctx
);
833 _mesa_init_line( ctx
);
834 _mesa_init_lighting( ctx
);
835 _mesa_init_matrix( ctx
);
836 _mesa_init_multisample( ctx
);
837 _mesa_init_performance_monitors( ctx
);
838 _mesa_init_pipeline( ctx
);
839 _mesa_init_pixel( ctx
);
840 _mesa_init_pixelstore( ctx
);
841 _mesa_init_point( ctx
);
842 _mesa_init_polygon( ctx
);
843 _mesa_init_program( ctx
);
844 _mesa_init_queryobj( ctx
);
845 _mesa_init_sync( ctx
);
846 _mesa_init_rastpos( ctx
);
847 _mesa_init_scissor( ctx
);
848 _mesa_init_shader_state( ctx
);
849 _mesa_init_stencil( ctx
);
850 _mesa_init_transform( ctx
);
851 _mesa_init_transform_feedback( ctx
);
852 _mesa_init_varray( ctx
);
853 _mesa_init_viewport( ctx
);
855 if (!_mesa_init_texture( ctx
))
858 _mesa_init_texture_s3tc( ctx
);
861 ctx
->NewState
= _NEW_ALL
;
862 ctx
->NewDriverState
= ~0;
863 ctx
->ErrorValue
= GL_NO_ERROR
;
864 ctx
->ShareGroupReset
= false;
865 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
872 * Update default objects in a GL context with respect to shared state.
874 * \param ctx GL context.
876 * Removes references to old default objects, (texture objects, program
877 * objects, etc.) and changes to reference those from the current shared
881 update_default_objects(struct gl_context
*ctx
)
885 _mesa_update_default_objects_program(ctx
);
886 _mesa_update_default_objects_texture(ctx
);
887 _mesa_update_default_objects_buffer_objects(ctx
);
893 /* XXX this is temporary and should be removed at some point in the
894 * future when there's a reasonable expectation that the libGL library
895 * contains the _glapi_new_nop_table() and _glapi_set_nop_handler()
896 * functions which were added in Mesa 10.6.
899 /* Avoid libGL / driver ABI break */
900 #define USE_GLAPI_NOP_FEATURES 0
902 #define USE_GLAPI_NOP_FEATURES 1
907 * This function is called by the glapi no-op functions. For each OpenGL
908 * function/entrypoint there's a simple no-op function. These "no-op"
909 * functions call this function.
911 * If there's a current OpenGL context for the calling thread, we record a
912 * GL_INVALID_OPERATION error. This can happen either because the app's
913 * calling an unsupported extension function, or calling an illegal function
914 * (such as glClear between glBegin/glEnd).
916 * If there's no current OpenGL context for the calling thread, we can
917 * print a message to stderr.
919 * \param name the name of the OpenGL function
921 #if USE_GLAPI_NOP_FEATURES
923 nop_handler(const char *name
)
925 GET_CURRENT_CONTEXT(ctx
);
927 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid call)", name
);
930 else if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
932 "GL User Error: gl%s called without a rendering context\n",
942 * Special no-op glFlush, see below.
945 static void GLAPIENTRY
948 /* don't record an error like we do in nop_handler() */
953 #if !USE_GLAPI_NOP_FEATURES
957 GET_CURRENT_CONTEXT(ctx
);
958 _mesa_error(ctx
, GL_INVALID_OPERATION
,
959 "unsupported function called "
960 "(unsupported extension or deprecated function?)");
967 * Create a new API dispatch table in which all entries point to the
968 * generic_nop() function. This will not work on Windows because of
969 * the __stdcall convention which requires the callee to clean up the
970 * call stack. That's impossible with one generic no-op function.
972 struct _glapi_table
*
973 _mesa_new_nop_table(unsigned numEntries
)
975 struct _glapi_table
*table
;
977 #if !USE_GLAPI_NOP_FEATURES
978 table
= malloc(numEntries
* sizeof(_glapi_proc
));
980 _glapi_proc
*entry
= (_glapi_proc
*) table
;
982 for (i
= 0; i
< numEntries
; i
++) {
983 entry
[i
] = (_glapi_proc
) generic_nop
;
987 table
= _glapi_new_nop_table(numEntries
);
994 * Allocate and initialize a new dispatch table. The table will be
995 * populated with pointers to "no-op" functions. In turn, the no-op
996 * functions will call nop_handler() above.
998 static struct _glapi_table
*
999 alloc_dispatch_table(void)
1001 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1002 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1003 * Mesa we do this to accommodate different versions of libGL and various
1006 int numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
1008 struct _glapi_table
*table
= _mesa_new_nop_table(numEntries
);
1012 /* This is a special case for Windows in the event that
1013 * wglGetProcAddress is called between glBegin/End().
1015 * The MS opengl32.dll library apparently calls glFlush from
1016 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
1017 * will dispatch to _mesa_generic_nop() and we'll generate a
1018 * GL_INVALID_OPERATION error.
1020 * The specific case which hits this is piglit's primitive-restart
1021 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
1022 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
1023 * code will try to resolve the function by calling wglGetProcAddress.
1024 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
1025 * will fail causing the test to fail. By suppressing the error, the
1026 * assertion passes and the test continues.
1028 SET_Flush(table
, nop_glFlush
);
1032 #if USE_GLAPI_NOP_FEATURES
1033 _glapi_set_nop_handler(nop_handler
);
1040 * Creates a minimal dispatch table for use within glBegin()/glEnd().
1042 * This ensures that we generate GL_INVALID_OPERATION errors from most
1043 * functions, since the set of functions that are valid within Begin/End is
1046 * From the GL 1.0 specification section 2.6.3, "GL Commands within
1049 * "The only GL commands that are allowed within any Begin/End pairs are
1050 * the commands for specifying vertex coordinates, vertex color, normal
1051 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
1052 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
1053 * commands for specifying lighting material parameters (Material
1054 * commands see section 2.12.2), display list invocation commands
1055 * (CallList and CallLists see section 5.4), and the EdgeFlag
1056 * command. Executing Begin after Begin has already been executed but
1057 * before an End is issued generates the INVALID OPERATION error, as does
1058 * executing End without a previous corresponding Begin. Executing any
1059 * other GL command within Begin/End results in the error INVALID
1062 * The table entries for specifying vertex attributes are set up by
1063 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
1064 * are set by install_vtxfmt() as well.
1066 static struct _glapi_table
*
1067 create_beginend_table(const struct gl_context
*ctx
)
1069 struct _glapi_table
*table
;
1071 table
= alloc_dispatch_table();
1075 /* Fill in functions which return a value, since they should return some
1076 * specific value even if they emit a GL_INVALID_OPERATION error from them
1077 * being called within glBegin()/glEnd().
1079 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1081 COPY_DISPATCH(GenLists
);
1082 COPY_DISPATCH(IsProgram
);
1083 COPY_DISPATCH(IsVertexArray
);
1084 COPY_DISPATCH(IsBuffer
);
1085 COPY_DISPATCH(IsEnabled
);
1086 COPY_DISPATCH(IsEnabledi
);
1087 COPY_DISPATCH(IsRenderbuffer
);
1088 COPY_DISPATCH(IsFramebuffer
);
1089 COPY_DISPATCH(CheckFramebufferStatus
);
1090 COPY_DISPATCH(RenderMode
);
1091 COPY_DISPATCH(GetString
);
1092 COPY_DISPATCH(GetStringi
);
1093 COPY_DISPATCH(GetPointerv
);
1094 COPY_DISPATCH(IsQuery
);
1095 COPY_DISPATCH(IsSampler
);
1096 COPY_DISPATCH(IsSync
);
1097 COPY_DISPATCH(IsTexture
);
1098 COPY_DISPATCH(IsTransformFeedback
);
1099 COPY_DISPATCH(DeleteQueries
);
1100 COPY_DISPATCH(AreTexturesResident
);
1101 COPY_DISPATCH(FenceSync
);
1102 COPY_DISPATCH(ClientWaitSync
);
1103 COPY_DISPATCH(MapBuffer
);
1104 COPY_DISPATCH(UnmapBuffer
);
1105 COPY_DISPATCH(MapBufferRange
);
1106 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1107 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1109 _mesa_loopback_init_api_table(ctx
, table
);
1115 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1117 /* Do the code-generated setup of the exec table in api_exec.c. */
1118 _mesa_initialize_exec_table(ctx
);
1121 _mesa_initialize_save_table(ctx
);
1125 * Initialize a struct gl_context struct (rendering context).
1127 * This includes allocating all the other structs and arrays which hang off of
1128 * the context by pointers.
1129 * Note that the driver needs to pass in its dd_function_table here since
1130 * we need to at least call driverFunctions->NewTextureObject to create the
1131 * default texture objects.
1133 * Called by _mesa_create_context().
1135 * Performs the imports and exports callback tables initialization, and
1136 * miscellaneous one-time initializations. If no shared context is supplied one
1137 * is allocated, and increase its reference count. Setups the GL API dispatch
1138 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1139 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1142 * \param ctx the context to initialize
1143 * \param api the GL API type to create the context for
1144 * \param visual describes the visual attributes for this context or NULL to
1145 * create a configless context
1146 * \param share_list points to context to share textures, display lists,
1148 * \param driverFunctions table of device driver functions for this context
1152 _mesa_initialize_context(struct gl_context
*ctx
,
1154 const struct gl_config
*visual
,
1155 struct gl_context
*share_list
,
1156 const struct dd_function_table
*driverFunctions
)
1158 struct gl_shared_state
*shared
;
1161 assert(driverFunctions
->NewTextureObject
);
1162 assert(driverFunctions
->FreeTextureImageBuffer
);
1165 ctx
->DrawBuffer
= NULL
;
1166 ctx
->ReadBuffer
= NULL
;
1167 ctx
->WinSysDrawBuffer
= NULL
;
1168 ctx
->WinSysReadBuffer
= NULL
;
1171 ctx
->Visual
= *visual
;
1172 ctx
->HasConfig
= GL_TRUE
;
1175 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1176 ctx
->HasConfig
= GL_FALSE
;
1179 _mesa_override_gl_version(ctx
);
1181 /* misc one-time initializations */
1184 /* Plug in driver functions and context pointer here.
1185 * This is important because when we call alloc_shared_state() below
1186 * we'll call ctx->Driver.NewTextureObject() to create the default
1189 ctx
->Driver
= *driverFunctions
;
1192 /* share state with another context */
1193 shared
= share_list
->Shared
;
1196 /* allocate new, unshared state */
1197 shared
= _mesa_alloc_shared_state(ctx
);
1202 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1204 if (!init_attrib_groups( ctx
))
1207 /* setup the API dispatch tables with all nop functions */
1208 ctx
->OutsideBeginEnd
= alloc_dispatch_table();
1209 if (!ctx
->OutsideBeginEnd
)
1211 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1212 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1214 ctx
->FragmentProgram
._MaintainTexEnvProgram
1215 = (getenv("MESA_TEX_PROG") != NULL
);
1217 ctx
->VertexProgram
._MaintainTnlProgram
1218 = (getenv("MESA_TNL_PROG") != NULL
);
1219 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1220 /* this is required... */
1221 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1224 /* Mesa core handles all the formats that mesa core knows about.
1225 * Drivers will want to override this list with just the formats
1226 * they can handle, and confirm that appropriate fallbacks exist in
1227 * _mesa_choose_tex_format().
1229 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1230 sizeof(ctx
->TextureFormatSupported
));
1233 case API_OPENGL_COMPAT
:
1234 ctx
->BeginEnd
= create_beginend_table(ctx
);
1235 ctx
->Save
= alloc_dispatch_table();
1236 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1240 case API_OPENGL_CORE
:
1244 * GL_OES_texture_cube_map says
1245 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1247 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1248 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1249 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1250 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1251 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1252 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1253 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1254 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1258 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1259 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1263 ctx
->FirstTimeCurrent
= GL_TRUE
;
1268 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1269 free(ctx
->BeginEnd
);
1270 free(ctx
->OutsideBeginEnd
);
1277 * Free the data associated with the given context.
1279 * But doesn't free the struct gl_context struct itself.
1281 * \sa _mesa_initialize_context() and init_attrib_groups().
1284 _mesa_free_context_data( struct gl_context
*ctx
)
1286 if (!_mesa_get_current_context()){
1287 /* No current context, but we may need one in order to delete
1288 * texture objs, etc. So temporarily bind the context now.
1290 _mesa_make_current(ctx
, NULL
, NULL
);
1293 /* unreference WinSysDraw/Read buffers */
1294 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1295 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1296 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1297 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1299 _mesa_reference_program(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1300 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1301 _mesa_reference_program(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1303 _mesa_reference_program(ctx
, &ctx
->TessCtrlProgram
._Current
, NULL
);
1304 _mesa_reference_program(ctx
, &ctx
->TessEvalProgram
._Current
, NULL
);
1305 _mesa_reference_program(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1307 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1308 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1309 _mesa_reference_program(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1311 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1312 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1314 _mesa_free_attrib_data(ctx
);
1315 _mesa_free_buffer_objects(ctx
);
1316 _mesa_free_eval_data( ctx
);
1317 _mesa_free_texture_data( ctx
);
1318 _mesa_free_matrix_data( ctx
);
1319 _mesa_free_pipeline_data(ctx
);
1320 _mesa_free_program_data(ctx
);
1321 _mesa_free_shader_state(ctx
);
1322 _mesa_free_queryobj_data(ctx
);
1323 _mesa_free_sync_data(ctx
);
1324 _mesa_free_varray_data(ctx
);
1325 _mesa_free_transform_feedback(ctx
);
1326 _mesa_free_performance_monitors(ctx
);
1328 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1329 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1330 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1331 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1333 /* free dispatch tables */
1334 free(ctx
->BeginEnd
);
1335 free(ctx
->OutsideBeginEnd
);
1337 free(ctx
->ContextLost
);
1339 /* Shared context state (display lists, textures, etc) */
1340 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1342 /* needs to be after freeing shared state */
1343 _mesa_free_display_list_data(ctx
);
1345 _mesa_free_errors_data(ctx
);
1347 free((void *)ctx
->Extensions
.String
);
1349 free(ctx
->VersionString
);
1351 /* unbind the context if it's currently bound */
1352 if (ctx
== _mesa_get_current_context()) {
1353 _mesa_make_current(NULL
, NULL
, NULL
);
1359 * Destroy a struct gl_context structure.
1361 * \param ctx GL context.
1363 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1366 _mesa_destroy_context( struct gl_context
*ctx
)
1369 _mesa_free_context_data(ctx
);
1370 free( (void *) ctx
);
1376 * Copy attribute groups from one context to another.
1378 * \param src source context
1379 * \param dst destination context
1380 * \param mask bitwise OR of GL_*_BIT flags
1382 * According to the bits specified in \p mask, copies the corresponding
1383 * attributes from \p src into \p dst. For many of the attributes a simple \c
1384 * memcpy is not enough due to the existence of internal pointers in their data
1388 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1391 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1393 dst
->Accum
= src
->Accum
;
1395 if (mask
& GL_COLOR_BUFFER_BIT
) {
1397 dst
->Color
= src
->Color
;
1399 if (mask
& GL_CURRENT_BIT
) {
1401 dst
->Current
= src
->Current
;
1403 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1405 dst
->Depth
= src
->Depth
;
1407 if (mask
& GL_ENABLE_BIT
) {
1410 if (mask
& GL_EVAL_BIT
) {
1412 dst
->Eval
= src
->Eval
;
1414 if (mask
& GL_FOG_BIT
) {
1416 dst
->Fog
= src
->Fog
;
1418 if (mask
& GL_HINT_BIT
) {
1420 dst
->Hint
= src
->Hint
;
1422 if (mask
& GL_LIGHTING_BIT
) {
1424 dst
->Light
= src
->Light
;
1426 if (mask
& GL_LINE_BIT
) {
1428 dst
->Line
= src
->Line
;
1430 if (mask
& GL_LIST_BIT
) {
1432 dst
->List
= src
->List
;
1434 if (mask
& GL_PIXEL_MODE_BIT
) {
1436 dst
->Pixel
= src
->Pixel
;
1438 if (mask
& GL_POINT_BIT
) {
1440 dst
->Point
= src
->Point
;
1442 if (mask
& GL_POLYGON_BIT
) {
1444 dst
->Polygon
= src
->Polygon
;
1446 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1447 /* Use loop instead of memcpy due to problem with Portland Group's
1448 * C compiler. Reported by John Stone.
1451 for (i
= 0; i
< 32; i
++) {
1452 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1455 if (mask
& GL_SCISSOR_BIT
) {
1457 dst
->Scissor
= src
->Scissor
;
1459 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1461 dst
->Stencil
= src
->Stencil
;
1463 if (mask
& GL_TEXTURE_BIT
) {
1464 /* Cannot memcpy because of pointers */
1465 _mesa_copy_texture_state(src
, dst
);
1467 if (mask
& GL_TRANSFORM_BIT
) {
1469 dst
->Transform
= src
->Transform
;
1471 if (mask
& GL_VIEWPORT_BIT
) {
1473 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1475 dst
->ViewportArray
[i
] = src
->ViewportArray
[i
];
1479 /* XXX FIXME: Call callbacks?
1481 dst
->NewState
= _NEW_ALL
;
1482 dst
->NewDriverState
= ~0;
1487 * Check if the given context can render into the given framebuffer
1488 * by checking visual attributes.
1490 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1493 check_compatible(const struct gl_context
*ctx
,
1494 const struct gl_framebuffer
*buffer
)
1496 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1497 const struct gl_config
*bufvis
= &buffer
->Visual
;
1499 if (buffer
== _mesa_get_incomplete_framebuffer())
1502 #define check_component(foo) \
1503 if (ctxvis->foo && bufvis->foo && \
1504 ctxvis->foo != bufvis->foo) \
1507 check_component(redMask
);
1508 check_component(greenMask
);
1509 check_component(blueMask
);
1510 check_component(depthBits
);
1511 check_component(stencilBits
);
1513 #undef check_component
1520 * Check if the viewport/scissor size has not yet been initialized.
1521 * Initialize the size if the given width and height are non-zero.
1524 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1526 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1529 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1530 * potential infinite recursion.
1532 ctx
->ViewportInitialized
= GL_TRUE
;
1534 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1535 * yet, so just initialize all of them.
1537 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1538 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1539 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1545 handle_first_current(struct gl_context
*ctx
)
1547 if (ctx
->Version
== 0) {
1548 /* probably in the process of tearing down the context */
1552 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1554 check_context_limits(ctx
);
1556 /* According to GL_MESA_configless_context the default value of
1557 * glDrawBuffers depends on the config of the first surface it is bound to.
1558 * For GLES it is always GL_BACK which has a magic interpretation */
1559 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1560 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1563 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1568 _mesa_drawbuffers(ctx
, ctx
->DrawBuffer
, 1, &buffer
,
1569 NULL
/* destMask */);
1572 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1573 gl_buffer_index bufferIndex
;
1576 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1578 bufferIndex
= BUFFER_BACK_LEFT
;
1582 bufferIndex
= BUFFER_FRONT_LEFT
;
1585 _mesa_readbuffer(ctx
, ctx
->ReadBuffer
, buffer
, bufferIndex
);
1589 /* We can use this to help debug user's problems. Tell them to set
1590 * the MESA_INFO env variable before running their app. Then the
1591 * first time each context is made current we'll print some useful
1594 if (getenv("MESA_INFO")) {
1595 _mesa_print_info(ctx
);
1600 * Bind the given context to the given drawBuffer and readBuffer and
1601 * make it the current context for the calling thread.
1602 * We'll render into the drawBuffer and read pixels from the
1603 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1605 * We check that the context's and framebuffer's visuals are compatible
1606 * and return immediately if they're not.
1608 * \param newCtx the new GL context. If NULL then there will be no current GL
1610 * \param drawBuffer the drawing framebuffer
1611 * \param readBuffer the reading framebuffer
1614 _mesa_make_current( struct gl_context
*newCtx
,
1615 struct gl_framebuffer
*drawBuffer
,
1616 struct gl_framebuffer
*readBuffer
)
1618 GET_CURRENT_CONTEXT(curCtx
);
1620 if (MESA_VERBOSE
& VERBOSE_API
)
1621 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1623 /* Check that the context's and framebuffer's visuals are compatible.
1625 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1626 if (!check_compatible(newCtx
, drawBuffer
)) {
1627 _mesa_warning(newCtx
,
1628 "MakeCurrent: incompatible visuals for context and drawbuffer");
1632 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1633 if (!check_compatible(newCtx
, readBuffer
)) {
1634 _mesa_warning(newCtx
,
1635 "MakeCurrent: incompatible visuals for context and readbuffer");
1641 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1642 /* make sure this context is valid for flushing */
1644 curCtx
->Const
.ContextReleaseBehavior
==
1645 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
)
1646 _mesa_flush(curCtx
);
1648 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1649 _glapi_set_context((void *) newCtx
);
1650 assert(_mesa_get_current_context() == newCtx
);
1653 _glapi_set_dispatch(NULL
); /* none current */
1655 _mesa_reference_framebuffer(&curCtx
->WinSysDrawBuffer
, NULL
);
1656 _mesa_reference_framebuffer(&curCtx
->WinSysReadBuffer
, NULL
);
1660 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1662 if (drawBuffer
&& readBuffer
) {
1663 assert(_mesa_is_winsys_fbo(drawBuffer
));
1664 assert(_mesa_is_winsys_fbo(readBuffer
));
1665 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1666 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1669 * Only set the context's Draw/ReadBuffer fields if they're NULL
1670 * or not bound to a user-created FBO.
1672 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1673 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1674 /* Update the FBO's list of drawbuffers/renderbuffers.
1675 * For winsys FBOs this comes from the GL state (which may have
1676 * changed since the last time this FBO was bound).
1678 _mesa_update_draw_buffers(newCtx
);
1680 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1681 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1682 /* In _mesa_initialize_window_framebuffer, for single-buffered
1683 * visuals, the ColorReadBuffer is set to be GL_FRONT, even with
1684 * GLES contexts. When calling read_buffer, we verify we are reading
1685 * from GL_BACK in is_legal_es3_readbuffer_enum. But the default is
1686 * incorrect, and certain dEQP tests check this. So fix it here.
1688 if (_mesa_is_gles(newCtx
) &&
1689 !newCtx
->ReadBuffer
->Visual
.doubleBufferMode
)
1690 if (newCtx
->ReadBuffer
->ColorReadBuffer
== GL_FRONT
)
1691 newCtx
->ReadBuffer
->ColorReadBuffer
= GL_BACK
;
1694 /* XXX only set this flag if we're really changing the draw/read
1695 * framebuffer bindings.
1697 newCtx
->NewState
|= _NEW_BUFFERS
;
1699 _mesa_check_init_viewport(newCtx
,
1700 drawBuffer
->Width
, drawBuffer
->Height
);
1703 if (newCtx
->FirstTimeCurrent
) {
1704 handle_first_current(newCtx
);
1705 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1714 * Make context 'ctx' share the display lists, textures and programs
1715 * that are associated with 'ctxToShare'.
1716 * Any display lists, textures or programs associated with 'ctx' will
1717 * be deleted if nobody else is sharing them.
1720 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1722 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1723 struct gl_shared_state
*oldShared
= NULL
;
1725 /* save ref to old state to prevent it from being deleted immediately */
1726 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1728 /* update ctx's Shared pointer */
1729 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1731 update_default_objects(ctx
);
1733 /* release the old shared state */
1734 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1746 * \return pointer to the current GL context for this thread.
1748 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1749 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1753 _mesa_get_current_context( void )
1755 return (struct gl_context
*) _glapi_get_context();
1760 * Get context's current API dispatch table.
1762 * It'll either be the immediate-mode execute dispatcher or the display list
1763 * compile dispatcher.
1765 * \param ctx GL context.
1767 * \return pointer to dispatch_table.
1769 * Simply returns __struct gl_contextRec::CurrentDispatch.
1771 struct _glapi_table
*
1772 _mesa_get_dispatch(struct gl_context
*ctx
)
1774 return ctx
->CurrentDispatch
;
1780 /**********************************************************************/
1781 /** \name Miscellaneous functions */
1782 /**********************************************************************/
1788 * \param ctx GL context.
1789 * \param error error code.
1791 * Records the given error code and call the driver's dd_function_table::Error
1792 * function if defined.
1795 * This is called via _mesa_error().
1798 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1803 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1804 ctx
->ErrorValue
= error
;
1810 * Flush commands and wait for completion.
1813 _mesa_finish(struct gl_context
*ctx
)
1815 FLUSH_VERTICES( ctx
, 0 );
1816 FLUSH_CURRENT( ctx
, 0 );
1817 if (ctx
->Driver
.Finish
) {
1818 ctx
->Driver
.Finish(ctx
);
1827 _mesa_flush(struct gl_context
*ctx
)
1829 FLUSH_VERTICES( ctx
, 0 );
1830 FLUSH_CURRENT( ctx
, 0 );
1831 if (ctx
->Driver
.Flush
) {
1832 ctx
->Driver
.Flush(ctx
);
1839 * Execute glFinish().
1841 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1842 * dd_function_table::Finish driver callback, if not NULL.
1847 GET_CURRENT_CONTEXT(ctx
);
1848 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1854 * Execute glFlush().
1856 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1857 * dd_function_table::Flush driver callback, if not NULL.
1862 GET_CURRENT_CONTEXT(ctx
);
1863 ASSERT_OUTSIDE_BEGIN_END(ctx
);