2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
28 * Mesa context/visual/framebuffer management functions.
33 * \mainpage Mesa Main Module
35 * \section MainIntroduction Introduction
37 * The Mesa Main module consists of all the files in the main/ directory.
38 * Among the features of this module are:
40 * <LI> Structures to represent most GL state </LI>
41 * <LI> State set/get functions </LI>
42 * <LI> Display lists </LI>
43 * <LI> Texture unit, object and image handling </LI>
44 * <LI> Matrix and attribute stacks </LI>
47 * Other modules are responsible for API dispatch, vertex transformation,
48 * point/line/triangle setup, rasterization, vertex array caching,
49 * vertex/fragment programs/shaders, etc.
52 * \section AboutDoxygen About Doxygen
54 * If you're viewing this information as Doxygen-generated HTML you'll
55 * see the documentation index at the top of this page.
57 * The first line lists the Mesa source code modules.
58 * The second line lists the indexes available for viewing the documentation
61 * Selecting the <b>Main page</b> link will display a summary of the module
64 * Selecting <b>Data Structures</b> will list all C structures.
66 * Selecting the <b>File List</b> link will list all the source files in
68 * Selecting a filename will show a list of all functions defined in that file.
70 * Selecting the <b>Data Fields</b> link will display a list of all
71 * documented structure members.
73 * Selecting the <b>Globals</b> link will display a list
74 * of all functions, structures, global variables and macros in the module.
83 #include "api_loopback.h"
88 #include "bufferobj.h"
95 #include "extensions.h"
100 #include "framebuffer.h"
107 #include "multisample.h"
108 #include "performance_monitor.h"
109 #include "pipelineobj.h"
111 #include "pixelstore.h"
114 #include "queryobj.h"
120 #include "shaderobj.h"
121 #include "util/simple_list.h"
124 #include "texcompress_s3tc.h"
125 #include "texstate.h"
126 #include "transformfeedback.h"
130 #include "viewport.h"
132 #include "program/program.h"
133 #include "program/prog_print.h"
134 #include "math/m_matrix.h"
135 #include "main/dispatch.h" /* for _gloffset_COUNT */
136 #include "uniforms.h"
139 #include "sparc/sparc.h"
142 #include "glsl_parser_extras.h"
147 int MESA_VERBOSE
= 0;
150 #ifndef MESA_DEBUG_FLAGS
151 int MESA_DEBUG_FLAGS
= 0;
155 /* ubyte -> float conversion */
156 GLfloat _mesa_ubyte_to_float_color_tab
[256];
161 * Swap buffers notification callback.
163 * \param ctx GL context.
165 * Called by window system just before swapping buffers.
166 * We have to finish any pending rendering.
169 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
171 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
172 _mesa_debug(ctx
, "SwapBuffers\n");
173 FLUSH_CURRENT( ctx
, 0 );
174 if (ctx
->Driver
.Flush
) {
175 ctx
->Driver
.Flush(ctx
);
180 /**********************************************************************/
181 /** \name GL Visual allocation/destruction */
182 /**********************************************************************/
186 * Allocates a struct gl_config structure and initializes it via
187 * _mesa_initialize_visual().
189 * \param dbFlag double buffering
190 * \param stereoFlag stereo buffer
191 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
192 * is acceptable but the actual depth type will be GLushort or GLuint as
194 * \param stencilBits requested minimum bits per stencil buffer value
195 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
196 * of bits per color component in accum buffer.
197 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
198 * \param redBits number of bits per color component in frame buffer for RGB(A)
199 * mode. We always use 8 in core Mesa though.
200 * \param greenBits same as above.
201 * \param blueBits same as above.
202 * \param alphaBits same as above.
203 * \param numSamples not really used.
205 * \return pointer to new struct gl_config or NULL if requested parameters
208 * \note Need to add params for level and numAuxBuffers (at least)
211 _mesa_create_visual( GLboolean dbFlag
,
212 GLboolean stereoFlag
,
220 GLint accumGreenBits
,
222 GLint accumAlphaBits
,
225 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
227 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
228 redBits
, greenBits
, blueBits
, alphaBits
,
229 depthBits
, stencilBits
,
230 accumRedBits
, accumGreenBits
,
231 accumBlueBits
, accumAlphaBits
,
242 * Makes some sanity checks and fills in the fields of the struct
243 * gl_config object with the given parameters. If the caller needs to
244 * set additional fields, he should just probably init the whole
245 * gl_config object himself.
247 * \return GL_TRUE on success, or GL_FALSE on failure.
249 * \sa _mesa_create_visual() above for the parameter description.
252 _mesa_initialize_visual( struct gl_config
*vis
,
254 GLboolean stereoFlag
,
262 GLint accumGreenBits
,
264 GLint accumAlphaBits
,
269 if (depthBits
< 0 || depthBits
> 32) {
272 if (stencilBits
< 0 || stencilBits
> 8) {
275 assert(accumRedBits
>= 0);
276 assert(accumGreenBits
>= 0);
277 assert(accumBlueBits
>= 0);
278 assert(accumAlphaBits
>= 0);
280 vis
->rgbMode
= GL_TRUE
;
281 vis
->doubleBufferMode
= dbFlag
;
282 vis
->stereoMode
= stereoFlag
;
284 vis
->redBits
= redBits
;
285 vis
->greenBits
= greenBits
;
286 vis
->blueBits
= blueBits
;
287 vis
->alphaBits
= alphaBits
;
288 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
291 vis
->depthBits
= depthBits
;
292 vis
->stencilBits
= stencilBits
;
294 vis
->accumRedBits
= accumRedBits
;
295 vis
->accumGreenBits
= accumGreenBits
;
296 vis
->accumBlueBits
= accumBlueBits
;
297 vis
->accumAlphaBits
= accumAlphaBits
;
299 vis
->haveAccumBuffer
= accumRedBits
> 0;
300 vis
->haveDepthBuffer
= depthBits
> 0;
301 vis
->haveStencilBuffer
= stencilBits
> 0;
303 vis
->numAuxBuffers
= 0;
305 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
306 vis
->samples
= numSamples
;
313 * Destroy a visual and free its memory.
317 * Frees the visual structure.
320 _mesa_destroy_visual( struct gl_config
*vis
)
328 /**********************************************************************/
329 /** \name Context allocation, initialization, destroying
331 * The purpose of the most initialization functions here is to provide the
332 * default state values according to the OpenGL specification.
334 /**********************************************************************/
339 * This is lame. gdb only seems to recognize enum types that are
340 * actually used somewhere. We want to be able to print/use enum
341 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
342 * the gl_texture_index type anywhere. Thus, this lame function.
345 dummy_enum_func(void)
347 gl_buffer_index bi
= BUFFER_FRONT_LEFT
;
348 gl_face_index fi
= FACE_POS_X
;
349 gl_frag_result fr
= FRAG_RESULT_DEPTH
;
350 gl_texture_index ti
= TEXTURE_2D_ARRAY_INDEX
;
351 gl_vert_attrib va
= VERT_ATTRIB_POS
;
352 gl_varying_slot vs
= VARYING_SLOT_POS
;
364 * One-time initialization mutex lock.
366 * \sa Used by one_time_init().
368 mtx_t OneTimeLock
= _MTX_INITIALIZER_NP
;
373 * Calls all the various one-time-init functions in Mesa.
375 * While holding a global mutex lock, calls several initialization functions,
376 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
382 one_time_init( struct gl_context
*ctx
)
384 static GLbitfield api_init_mask
= 0x0;
386 mtx_lock(&OneTimeLock
);
388 /* truly one-time init */
389 if (!api_init_mask
) {
392 /* do some implementation tests */
393 assert( sizeof(GLbyte
) == 1 );
394 assert( sizeof(GLubyte
) == 1 );
395 assert( sizeof(GLshort
) == 2 );
396 assert( sizeof(GLushort
) == 2 );
397 assert( sizeof(GLint
) == 4 );
398 assert( sizeof(GLuint
) == 4 );
400 _mesa_one_time_init_extension_overrides();
402 _mesa_get_cpu_features();
404 for (i
= 0; i
< 256; i
++) {
405 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
408 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
409 if (MESA_VERBOSE
!= 0) {
410 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
411 PACKAGE_VERSION
, __DATE__
, __TIME__
);
416 _mesa_test_formats();
420 /* per-API one-time init */
421 if (!(api_init_mask
& (1 << ctx
->API
))) {
422 _mesa_init_get_hash(ctx
);
424 _mesa_init_remap_table();
427 api_init_mask
|= 1 << ctx
->API
;
429 mtx_unlock(&OneTimeLock
);
431 /* Hopefully atexit() is widely available. If not, we may need some
434 atexit(_mesa_destroy_shader_compiler
);
441 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
444 _mesa_init_current(struct gl_context
*ctx
)
448 /* Init all to (0,0,0,1) */
449 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
450 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
453 /* redo special cases: */
454 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
455 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
456 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
457 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
458 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
459 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
464 * Init vertex/fragment/geometry program limits.
465 * Important: drivers should override these with actual limits.
468 init_program_limits(struct gl_constants
*consts
, gl_shader_stage stage
,
469 struct gl_program_constants
*prog
)
471 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
472 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
473 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
474 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
475 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
476 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
477 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
478 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
481 case MESA_SHADER_VERTEX
:
482 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
483 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
484 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
485 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
486 prog
->MaxInputComponents
= 0; /* value not used */
487 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
489 case MESA_SHADER_FRAGMENT
:
490 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
491 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
492 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
493 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
494 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
495 prog
->MaxOutputComponents
= 0; /* value not used */
497 case MESA_SHADER_GEOMETRY
:
498 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
499 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
500 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
501 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
502 prog
->MaxInputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
503 prog
->MaxOutputComponents
= 16 * 4; /* old limit not to break tnl and swrast */
505 case MESA_SHADER_COMPUTE
:
506 prog
->MaxParameters
= 0; /* not meaningful for compute shaders */
507 prog
->MaxAttribs
= 0; /* not meaningful for compute shaders */
508 prog
->MaxAddressRegs
= 0; /* not meaningful for compute shaders */
509 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
510 prog
->MaxInputComponents
= 0; /* not meaningful for compute shaders */
511 prog
->MaxOutputComponents
= 0; /* not meaningful for compute shaders */
514 assert(0 && "Bad shader stage in init_program_limits()");
517 /* Set the native limits to zero. This implies that there is no native
518 * support for shaders. Let the drivers fill in the actual values.
520 prog
->MaxNativeInstructions
= 0;
521 prog
->MaxNativeAluInstructions
= 0;
522 prog
->MaxNativeTexInstructions
= 0;
523 prog
->MaxNativeTexIndirections
= 0;
524 prog
->MaxNativeAttribs
= 0;
525 prog
->MaxNativeTemps
= 0;
526 prog
->MaxNativeAddressRegs
= 0;
527 prog
->MaxNativeParameters
= 0;
529 /* Set GLSL datatype range/precision info assuming IEEE float values.
530 * Drivers should override these defaults as needed.
532 prog
->MediumFloat
.RangeMin
= 127;
533 prog
->MediumFloat
.RangeMax
= 127;
534 prog
->MediumFloat
.Precision
= 23;
535 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
537 /* Assume ints are stored as floats for now, since this is the least-common
538 * denominator. The OpenGL ES spec implies (page 132) that the precision
539 * of integer types should be 0. Practically speaking, IEEE
540 * single-precision floating point values can only store integers in the
541 * range [-0x01000000, 0x01000000] without loss of precision.
543 prog
->MediumInt
.RangeMin
= 24;
544 prog
->MediumInt
.RangeMax
= 24;
545 prog
->MediumInt
.Precision
= 0;
546 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
548 prog
->MaxUniformBlocks
= 12;
549 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
550 consts
->MaxUniformBlockSize
/ 4 *
551 prog
->MaxUniformBlocks
);
553 prog
->MaxAtomicBuffers
= 0;
554 prog
->MaxAtomicCounters
= 0;
559 * Initialize fields of gl_constants (aka ctx->Const.*).
560 * Use defaults from config.h. The device drivers will often override
561 * some of these values (such as number of texture units).
564 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
)
569 /* Constants, may be overriden (usually only reduced) by device drivers */
570 consts
->MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
571 consts
->MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
572 consts
->Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
573 consts
->MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
574 consts
->MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
575 consts
->MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
576 consts
->MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
577 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
578 consts
->MaxTextureUnits
= MIN2(consts
->MaxTextureCoordUnits
,
579 consts
->Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
580 consts
->MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
581 consts
->MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
582 consts
->MaxTextureBufferSize
= 65536;
583 consts
->TextureBufferOffsetAlignment
= 1;
584 consts
->MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
585 consts
->SubPixelBits
= SUB_PIXEL_BITS
;
586 consts
->MinPointSize
= MIN_POINT_SIZE
;
587 consts
->MaxPointSize
= MAX_POINT_SIZE
;
588 consts
->MinPointSizeAA
= MIN_POINT_SIZE
;
589 consts
->MaxPointSizeAA
= MAX_POINT_SIZE
;
590 consts
->PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
591 consts
->MinLineWidth
= MIN_LINE_WIDTH
;
592 consts
->MaxLineWidth
= MAX_LINE_WIDTH
;
593 consts
->MinLineWidthAA
= MIN_LINE_WIDTH
;
594 consts
->MaxLineWidthAA
= MAX_LINE_WIDTH
;
595 consts
->LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
596 consts
->MaxClipPlanes
= 6;
597 consts
->MaxLights
= MAX_LIGHTS
;
598 consts
->MaxShininess
= 128.0;
599 consts
->MaxSpotExponent
= 128.0;
600 consts
->MaxViewportWidth
= MAX_VIEWPORT_WIDTH
;
601 consts
->MaxViewportHeight
= MAX_VIEWPORT_HEIGHT
;
602 consts
->MinMapBufferAlignment
= 64;
604 /* Driver must override these values if ARB_viewport_array is supported. */
605 consts
->MaxViewports
= 1;
606 consts
->ViewportSubpixelBits
= 0;
607 consts
->ViewportBounds
.Min
= 0;
608 consts
->ViewportBounds
.Max
= 0;
610 /** GL_ARB_uniform_buffer_object */
611 consts
->MaxCombinedUniformBlocks
= 36;
612 consts
->MaxUniformBufferBindings
= 36;
613 consts
->MaxUniformBlockSize
= 16384;
614 consts
->UniformBufferOffsetAlignment
= 1;
616 /* GL_ARB_explicit_uniform_location, GL_MAX_UNIFORM_LOCATIONS */
617 consts
->MaxUserAssignableUniformLocations
=
618 4 * MESA_SHADER_STAGES
* MAX_UNIFORMS
;
620 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++)
621 init_program_limits(consts
, i
, &consts
->Program
[i
]);
623 consts
->MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
624 consts
->MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
626 /* Assume that if GLSL 1.30+ (or GLSL ES 3.00+) is supported that
627 * gl_VertexID is implemented using a native hardware register with OpenGL
630 consts
->VertexID_is_zero_based
= false;
632 /* GL_ARB_draw_buffers */
633 consts
->MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
635 consts
->MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
636 consts
->MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
638 consts
->Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
639 consts
->MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
640 consts
->MaxVarying
= 16; /* old limit not to break tnl and swrast */
641 consts
->Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
642 consts
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
643 consts
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
645 /* Shading language version */
646 consts
->GLSLVersion
= 120;
647 _mesa_override_glsl_version(consts
);
650 consts
->GenerateTemporaryNames
= true;
652 consts
->GenerateTemporaryNames
= false;
655 /* GL_ARB_framebuffer_object */
656 consts
->MaxSamples
= 0;
658 /* GLSL default if NativeIntegers == FALSE */
659 consts
->UniformBooleanTrue
= FLT_AS_UINT(1.0f
);
662 consts
->MaxServerWaitTimeout
= 0x1fff7fffffffULL
;
664 /* GL_EXT_provoking_vertex */
665 consts
->QuadsFollowProvokingVertexConvention
= GL_TRUE
;
667 /* GL_EXT_transform_feedback */
668 consts
->MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
669 consts
->MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
670 consts
->MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
671 consts
->MaxVertexStreams
= 1;
674 consts
->ProfileMask
= api
== API_OPENGL_CORE
675 ? GL_CONTEXT_CORE_PROFILE_BIT
676 : GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
679 consts
->MaxVertexAttribStride
= 2048;
681 /** GL_EXT_gpu_shader4 */
682 consts
->MinProgramTexelOffset
= -8;
683 consts
->MaxProgramTexelOffset
= 7;
685 /* GL_ARB_texture_gather */
686 consts
->MinProgramTextureGatherOffset
= -8;
687 consts
->MaxProgramTextureGatherOffset
= 7;
689 /* GL_ARB_robustness */
690 consts
->ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
692 /* ES 3.0 or ARB_ES3_compatibility */
693 consts
->MaxElementIndex
= 0xffffffffu
;
695 /* GL_ARB_texture_multisample */
696 consts
->MaxColorTextureSamples
= 1;
697 consts
->MaxDepthTextureSamples
= 1;
698 consts
->MaxIntegerSamples
= 1;
700 /* GL_ARB_shader_atomic_counters */
701 consts
->MaxAtomicBufferBindings
= MAX_COMBINED_ATOMIC_BUFFERS
;
702 consts
->MaxAtomicBufferSize
= MAX_ATOMIC_COUNTERS
* ATOMIC_COUNTER_SIZE
;
703 consts
->MaxCombinedAtomicBuffers
= MAX_COMBINED_ATOMIC_BUFFERS
;
704 consts
->MaxCombinedAtomicCounters
= MAX_ATOMIC_COUNTERS
;
706 /* GL_ARB_vertex_attrib_binding */
707 consts
->MaxVertexAttribRelativeOffset
= 2047;
708 consts
->MaxVertexAttribBindings
= MAX_VERTEX_GENERIC_ATTRIBS
;
710 /* GL_ARB_compute_shader */
711 consts
->MaxComputeWorkGroupCount
[0] = 65535;
712 consts
->MaxComputeWorkGroupCount
[1] = 65535;
713 consts
->MaxComputeWorkGroupCount
[2] = 65535;
714 consts
->MaxComputeWorkGroupSize
[0] = 1024;
715 consts
->MaxComputeWorkGroupSize
[1] = 1024;
716 consts
->MaxComputeWorkGroupSize
[2] = 64;
717 consts
->MaxComputeWorkGroupInvocations
= 1024;
719 /** GL_ARB_gpu_shader5 */
720 consts
->MinFragmentInterpolationOffset
= MIN_FRAGMENT_INTERPOLATION_OFFSET
;
721 consts
->MaxFragmentInterpolationOffset
= MAX_FRAGMENT_INTERPOLATION_OFFSET
;
723 /** GL_KHR_context_flush_control */
724 consts
->ContextReleaseBehavior
= GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
;
729 * Do some sanity checks on the limits/constants for the given context.
730 * Only called the first time a context is bound.
733 check_context_limits(struct gl_context
*ctx
)
737 /* check that we don't exceed the size of various bitfields */
738 assert(VARYING_SLOT_MAX
<=
739 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
740 assert(VARYING_SLOT_MAX
<=
741 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
743 /* shader-related checks */
744 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
745 assert(ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
747 /* Texture unit checks */
748 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
> 0);
749 assert(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
750 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
751 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
752 assert(ctx
->Const
.MaxTextureUnits
> 0);
753 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
754 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
755 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
,
756 ctx
->Const
.MaxTextureCoordUnits
));
757 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
758 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
759 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
760 /* number of coord units cannot be greater than number of image units */
761 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
);
764 /* Texture size checks */
765 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
766 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
767 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
768 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
770 /* Texture level checks */
771 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
772 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
774 /* Max texture size should be <= max viewport size (render to texture) */
775 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
776 <= ctx
->Const
.MaxViewportWidth
);
777 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
778 <= ctx
->Const
.MaxViewportHeight
);
780 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
782 /* if this fails, add more enum values to gl_buffer_index */
783 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
785 /* XXX probably add more tests */
790 * Initialize the attribute groups in a GL context.
792 * \param ctx GL context.
794 * Initializes all the attributes, calling the respective <tt>init*</tt>
795 * functions for the more complex data structures.
798 init_attrib_groups(struct gl_context
*ctx
)
803 _mesa_init_constants(&ctx
->Const
, ctx
->API
);
806 _mesa_init_extensions(&ctx
->Extensions
);
808 /* Attribute Groups */
809 _mesa_init_accum( ctx
);
810 _mesa_init_attrib( ctx
);
811 _mesa_init_buffer_objects( ctx
);
812 _mesa_init_color( ctx
);
813 _mesa_init_current( ctx
);
814 _mesa_init_depth( ctx
);
815 _mesa_init_debug( ctx
);
816 _mesa_init_display_list( ctx
);
817 _mesa_init_errors( ctx
);
818 _mesa_init_eval( ctx
);
819 _mesa_init_fbobjects( ctx
);
820 _mesa_init_feedback( ctx
);
821 _mesa_init_fog( ctx
);
822 _mesa_init_hint( ctx
);
823 _mesa_init_line( ctx
);
824 _mesa_init_lighting( ctx
);
825 _mesa_init_matrix( ctx
);
826 _mesa_init_multisample( ctx
);
827 _mesa_init_performance_monitors( ctx
);
828 _mesa_init_pipeline( ctx
);
829 _mesa_init_pixel( ctx
);
830 _mesa_init_pixelstore( ctx
);
831 _mesa_init_point( ctx
);
832 _mesa_init_polygon( ctx
);
833 _mesa_init_program( ctx
);
834 _mesa_init_queryobj( ctx
);
835 _mesa_init_sync( ctx
);
836 _mesa_init_rastpos( ctx
);
837 _mesa_init_scissor( ctx
);
838 _mesa_init_shader_state( ctx
);
839 _mesa_init_stencil( ctx
);
840 _mesa_init_transform( ctx
);
841 _mesa_init_transform_feedback( ctx
);
842 _mesa_init_varray( ctx
);
843 _mesa_init_viewport( ctx
);
845 if (!_mesa_init_texture( ctx
))
848 _mesa_init_texture_s3tc( ctx
);
851 ctx
->NewState
= _NEW_ALL
;
852 ctx
->NewDriverState
= ~0;
853 ctx
->ErrorValue
= GL_NO_ERROR
;
854 ctx
->ShareGroupReset
= false;
855 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
862 * Update default objects in a GL context with respect to shared state.
864 * \param ctx GL context.
866 * Removes references to old default objects, (texture objects, program
867 * objects, etc.) and changes to reference those from the current shared
871 update_default_objects(struct gl_context
*ctx
)
875 _mesa_update_default_objects_program(ctx
);
876 _mesa_update_default_objects_texture(ctx
);
877 _mesa_update_default_objects_buffer_objects(ctx
);
884 * This is the default function we plug into all dispatch table slots
885 * This helps prevents a segfault when someone calls a GL function without
886 * first checking if the extension's supported.
889 _mesa_generic_nop(void)
891 GET_CURRENT_CONTEXT(ctx
);
892 _mesa_error(ctx
, GL_INVALID_OPERATION
,
893 "unsupported function called "
894 "(unsupported extension or deprecated function?)");
900 * Special no-op glFlush, see below.
903 static void GLAPIENTRY
906 /* don't record an error like we do in _mesa_generic_nop() */
911 extern void (*__glapi_noop_table
[])(void);
915 * Allocate and initialize a new dispatch table. All the dispatch
916 * function pointers will point at the _mesa_generic_nop() function
917 * which raises GL_INVALID_OPERATION.
919 struct _glapi_table
*
920 _mesa_alloc_dispatch_table(void)
922 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
923 * In practice, this'll be the same for stand-alone Mesa. But for DRI
924 * Mesa we do this to accomodate different versions of libGL and various
927 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
928 struct _glapi_table
*table
;
930 table
= malloc(numEntries
* sizeof(_glapi_proc
));
932 _glapi_proc
*entry
= (_glapi_proc
*) table
;
934 for (i
= 0; i
< numEntries
; i
++) {
936 /* FIXME: This will not generate an error, but at least it won't
937 * corrupt the stack like _mesa_generic_nop does. */
938 entry
[i
] = __glapi_noop_table
[i
];
940 entry
[i
] = (_glapi_proc
) _mesa_generic_nop
;
945 /* This is a special case for Windows in the event that
946 * wglGetProcAddress is called between glBegin/End().
948 * The MS opengl32.dll library apparently calls glFlush from
949 * wglGetProcAddress(). If we're inside glBegin/End(), glFlush
950 * will dispatch to _mesa_generic_nop() and we'll generate a
951 * GL_INVALID_OPERATION error.
953 * The specific case which hits this is piglit's primitive-restart
954 * test which calls glPrimitiveRestartNV() inside glBegin/End. The
955 * first time we call glPrimitiveRestartNV() Piglit's API dispatch
956 * code will try to resolve the function by calling wglGetProcAddress.
957 * This raises GL_INVALID_OPERATION and an assert(glGetError()==0)
958 * will fail causing the test to fail. By suppressing the error, the
959 * assertion passes and the test continues.
961 SET_Flush(table
, nop_glFlush
);
968 * Creates a minimal dispatch table for use within glBegin()/glEnd().
970 * This ensures that we generate GL_INVALID_OPERATION errors from most
971 * functions, since the set of functions that are valid within Begin/End is
974 * From the GL 1.0 specification section 2.6.3, "GL Commands within
977 * "The only GL commands that are allowed within any Begin/End pairs are
978 * the commands for specifying vertex coordinates, vertex color, normal
979 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
980 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
981 * commands for specifying lighting material parameters (Material
982 * commands see section 2.12.2), display list invocation commands
983 * (CallList and CallLists see section 5.4), and the EdgeFlag
984 * command. Executing Begin after Begin has already been executed but
985 * before an End is issued generates the INVALID OPERATION error, as does
986 * executing End without a previous corresponding Begin. Executing any
987 * other GL command within Begin/End results in the error INVALID
990 * The table entries for specifying vertex attributes are set up by
991 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
992 * are set by install_vtxfmt() as well.
994 static struct _glapi_table
*
995 create_beginend_table(const struct gl_context
*ctx
)
997 struct _glapi_table
*table
;
999 table
= _mesa_alloc_dispatch_table();
1003 /* Fill in functions which return a value, since they should return some
1004 * specific value even if they emit a GL_INVALID_OPERATION error from them
1005 * being called within glBegin()/glEnd().
1007 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
1009 COPY_DISPATCH(GenLists
);
1010 COPY_DISPATCH(IsProgram
);
1011 COPY_DISPATCH(IsVertexArray
);
1012 COPY_DISPATCH(IsBuffer
);
1013 COPY_DISPATCH(IsEnabled
);
1014 COPY_DISPATCH(IsEnabledi
);
1015 COPY_DISPATCH(IsRenderbuffer
);
1016 COPY_DISPATCH(IsFramebuffer
);
1017 COPY_DISPATCH(CheckFramebufferStatus
);
1018 COPY_DISPATCH(RenderMode
);
1019 COPY_DISPATCH(GetString
);
1020 COPY_DISPATCH(GetStringi
);
1021 COPY_DISPATCH(GetPointerv
);
1022 COPY_DISPATCH(IsQuery
);
1023 COPY_DISPATCH(IsSampler
);
1024 COPY_DISPATCH(IsSync
);
1025 COPY_DISPATCH(IsTexture
);
1026 COPY_DISPATCH(IsTransformFeedback
);
1027 COPY_DISPATCH(DeleteQueries
);
1028 COPY_DISPATCH(AreTexturesResident
);
1029 COPY_DISPATCH(FenceSync
);
1030 COPY_DISPATCH(ClientWaitSync
);
1031 COPY_DISPATCH(MapBuffer
);
1032 COPY_DISPATCH(UnmapBuffer
);
1033 COPY_DISPATCH(MapBufferRange
);
1034 COPY_DISPATCH(ObjectPurgeableAPPLE
);
1035 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
1037 _mesa_loopback_init_api_table(ctx
, table
);
1043 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
1045 /* Do the code-generated setup of the exec table in api_exec.c. */
1046 _mesa_initialize_exec_table(ctx
);
1049 _mesa_initialize_save_table(ctx
);
1053 * Initialize a struct gl_context struct (rendering context).
1055 * This includes allocating all the other structs and arrays which hang off of
1056 * the context by pointers.
1057 * Note that the driver needs to pass in its dd_function_table here since
1058 * we need to at least call driverFunctions->NewTextureObject to create the
1059 * default texture objects.
1061 * Called by _mesa_create_context().
1063 * Performs the imports and exports callback tables initialization, and
1064 * miscellaneous one-time initializations. If no shared context is supplied one
1065 * is allocated, and increase its reference count. Setups the GL API dispatch
1066 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1067 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1070 * \param ctx the context to initialize
1071 * \param api the GL API type to create the context for
1072 * \param visual describes the visual attributes for this context or NULL to
1073 * create a configless context
1074 * \param share_list points to context to share textures, display lists,
1076 * \param driverFunctions table of device driver functions for this context
1080 _mesa_initialize_context(struct gl_context
*ctx
,
1082 const struct gl_config
*visual
,
1083 struct gl_context
*share_list
,
1084 const struct dd_function_table
*driverFunctions
)
1086 struct gl_shared_state
*shared
;
1089 assert(driverFunctions
->NewTextureObject
);
1090 assert(driverFunctions
->FreeTextureImageBuffer
);
1093 ctx
->DrawBuffer
= NULL
;
1094 ctx
->ReadBuffer
= NULL
;
1095 ctx
->WinSysDrawBuffer
= NULL
;
1096 ctx
->WinSysReadBuffer
= NULL
;
1099 ctx
->Visual
= *visual
;
1100 ctx
->HasConfig
= GL_TRUE
;
1103 memset(&ctx
->Visual
, 0, sizeof ctx
->Visual
);
1104 ctx
->HasConfig
= GL_FALSE
;
1107 if (_mesa_is_desktop_gl(ctx
)) {
1108 _mesa_override_gl_version(ctx
);
1111 /* misc one-time initializations */
1114 /* Plug in driver functions and context pointer here.
1115 * This is important because when we call alloc_shared_state() below
1116 * we'll call ctx->Driver.NewTextureObject() to create the default
1119 ctx
->Driver
= *driverFunctions
;
1122 /* share state with another context */
1123 shared
= share_list
->Shared
;
1126 /* allocate new, unshared state */
1127 shared
= _mesa_alloc_shared_state(ctx
);
1132 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1134 if (!init_attrib_groups( ctx
))
1137 /* setup the API dispatch tables with all nop functions */
1138 ctx
->OutsideBeginEnd
= _mesa_alloc_dispatch_table();
1139 if (!ctx
->OutsideBeginEnd
)
1141 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1142 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1144 ctx
->FragmentProgram
._MaintainTexEnvProgram
1145 = (getenv("MESA_TEX_PROG") != NULL
);
1147 ctx
->VertexProgram
._MaintainTnlProgram
1148 = (getenv("MESA_TNL_PROG") != NULL
);
1149 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1150 /* this is required... */
1151 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1154 /* Mesa core handles all the formats that mesa core knows about.
1155 * Drivers will want to override this list with just the formats
1156 * they can handle, and confirm that appropriate fallbacks exist in
1157 * _mesa_choose_tex_format().
1159 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1160 sizeof(ctx
->TextureFormatSupported
));
1163 case API_OPENGL_COMPAT
:
1164 ctx
->BeginEnd
= create_beginend_table(ctx
);
1165 ctx
->Save
= _mesa_alloc_dispatch_table();
1166 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1170 case API_OPENGL_CORE
:
1174 * GL_OES_texture_cube_map says
1175 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1177 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1178 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1179 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1180 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1181 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1182 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1183 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1184 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1188 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1189 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1193 ctx
->FirstTimeCurrent
= GL_TRUE
;
1198 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1199 free(ctx
->BeginEnd
);
1200 free(ctx
->OutsideBeginEnd
);
1207 * Allocate and initialize a struct gl_context structure.
1208 * Note that the driver needs to pass in its dd_function_table here since
1209 * we need to at least call driverFunctions->NewTextureObject to initialize
1210 * the rendering context.
1212 * \param api the GL API type to create the context for
1213 * \param visual a struct gl_config pointer (we copy the struct contents) or
1214 * NULL to create a configless context
1215 * \param share_list another context to share display lists with or NULL
1216 * \param driverFunctions points to the dd_function_table into which the
1217 * driver has plugged in all its special functions.
1219 * \return pointer to a new __struct gl_contextRec or NULL if error.
1222 _mesa_create_context(gl_api api
,
1223 const struct gl_config
*visual
,
1224 struct gl_context
*share_list
,
1225 const struct dd_function_table
*driverFunctions
)
1227 struct gl_context
*ctx
;
1229 ctx
= calloc(1, sizeof(struct gl_context
));
1233 if (_mesa_initialize_context(ctx
, api
, visual
, share_list
,
1245 * Free the data associated with the given context.
1247 * But doesn't free the struct gl_context struct itself.
1249 * \sa _mesa_initialize_context() and init_attrib_groups().
1252 _mesa_free_context_data( struct gl_context
*ctx
)
1254 if (!_mesa_get_current_context()){
1255 /* No current context, but we may need one in order to delete
1256 * texture objs, etc. So temporarily bind the context now.
1258 _mesa_make_current(ctx
, NULL
, NULL
);
1261 /* unreference WinSysDraw/Read buffers */
1262 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1263 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1264 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1265 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1267 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1268 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1269 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1271 _mesa_reference_geomprog(ctx
, &ctx
->GeometryProgram
.Current
, NULL
);
1272 _mesa_reference_geomprog(ctx
, &ctx
->GeometryProgram
._Current
, NULL
);
1274 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1275 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1276 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1278 _mesa_reference_vao(ctx
, &ctx
->Array
.VAO
, NULL
);
1279 _mesa_reference_vao(ctx
, &ctx
->Array
.DefaultVAO
, NULL
);
1281 _mesa_free_attrib_data(ctx
);
1282 _mesa_free_buffer_objects(ctx
);
1283 _mesa_free_lighting_data( ctx
);
1284 _mesa_free_eval_data( ctx
);
1285 _mesa_free_texture_data( ctx
);
1286 _mesa_free_matrix_data( ctx
);
1287 _mesa_free_viewport_data( ctx
);
1288 _mesa_free_pipeline_data(ctx
);
1289 _mesa_free_program_data(ctx
);
1290 _mesa_free_shader_state(ctx
);
1291 _mesa_free_queryobj_data(ctx
);
1292 _mesa_free_sync_data(ctx
);
1293 _mesa_free_varray_data(ctx
);
1294 _mesa_free_transform_feedback(ctx
);
1295 _mesa_free_performance_monitors(ctx
);
1297 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1298 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1299 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1300 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1302 /* free dispatch tables */
1303 free(ctx
->BeginEnd
);
1304 free(ctx
->OutsideBeginEnd
);
1307 /* Shared context state (display lists, textures, etc) */
1308 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1310 /* needs to be after freeing shared state */
1311 _mesa_free_display_list_data(ctx
);
1313 _mesa_free_errors_data(ctx
);
1315 free((void *)ctx
->Extensions
.String
);
1317 free(ctx
->VersionString
);
1319 /* unbind the context if it's currently bound */
1320 if (ctx
== _mesa_get_current_context()) {
1321 _mesa_make_current(NULL
, NULL
, NULL
);
1327 * Destroy a struct gl_context structure.
1329 * \param ctx GL context.
1331 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1334 _mesa_destroy_context( struct gl_context
*ctx
)
1337 _mesa_free_context_data(ctx
);
1338 free( (void *) ctx
);
1344 * Copy attribute groups from one context to another.
1346 * \param src source context
1347 * \param dst destination context
1348 * \param mask bitwise OR of GL_*_BIT flags
1350 * According to the bits specified in \p mask, copies the corresponding
1351 * attributes from \p src into \p dst. For many of the attributes a simple \c
1352 * memcpy is not enough due to the existence of internal pointers in their data
1356 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1359 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1361 dst
->Accum
= src
->Accum
;
1363 if (mask
& GL_COLOR_BUFFER_BIT
) {
1365 dst
->Color
= src
->Color
;
1367 if (mask
& GL_CURRENT_BIT
) {
1369 dst
->Current
= src
->Current
;
1371 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1373 dst
->Depth
= src
->Depth
;
1375 if (mask
& GL_ENABLE_BIT
) {
1378 if (mask
& GL_EVAL_BIT
) {
1380 dst
->Eval
= src
->Eval
;
1382 if (mask
& GL_FOG_BIT
) {
1384 dst
->Fog
= src
->Fog
;
1386 if (mask
& GL_HINT_BIT
) {
1388 dst
->Hint
= src
->Hint
;
1390 if (mask
& GL_LIGHTING_BIT
) {
1392 /* begin with memcpy */
1393 dst
->Light
= src
->Light
;
1394 /* fixup linked lists to prevent pointer insanity */
1395 make_empty_list( &(dst
->Light
.EnabledList
) );
1396 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1397 if (dst
->Light
.Light
[i
].Enabled
) {
1398 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1402 if (mask
& GL_LINE_BIT
) {
1404 dst
->Line
= src
->Line
;
1406 if (mask
& GL_LIST_BIT
) {
1408 dst
->List
= src
->List
;
1410 if (mask
& GL_PIXEL_MODE_BIT
) {
1412 dst
->Pixel
= src
->Pixel
;
1414 if (mask
& GL_POINT_BIT
) {
1416 dst
->Point
= src
->Point
;
1418 if (mask
& GL_POLYGON_BIT
) {
1420 dst
->Polygon
= src
->Polygon
;
1422 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1423 /* Use loop instead of memcpy due to problem with Portland Group's
1424 * C compiler. Reported by John Stone.
1427 for (i
= 0; i
< 32; i
++) {
1428 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1431 if (mask
& GL_SCISSOR_BIT
) {
1433 dst
->Scissor
= src
->Scissor
;
1435 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1437 dst
->Stencil
= src
->Stencil
;
1439 if (mask
& GL_TEXTURE_BIT
) {
1440 /* Cannot memcpy because of pointers */
1441 _mesa_copy_texture_state(src
, dst
);
1443 if (mask
& GL_TRANSFORM_BIT
) {
1445 dst
->Transform
= src
->Transform
;
1447 if (mask
& GL_VIEWPORT_BIT
) {
1448 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1450 for (i
= 0; i
< src
->Const
.MaxViewports
; i
++) {
1451 dst
->ViewportArray
[i
].X
= src
->ViewportArray
[i
].X
;
1452 dst
->ViewportArray
[i
].Y
= src
->ViewportArray
[i
].Y
;
1453 dst
->ViewportArray
[i
].Width
= src
->ViewportArray
[i
].Width
;
1454 dst
->ViewportArray
[i
].Height
= src
->ViewportArray
[i
].Height
;
1455 dst
->ViewportArray
[i
].Near
= src
->ViewportArray
[i
].Near
;
1456 dst
->ViewportArray
[i
].Far
= src
->ViewportArray
[i
].Far
;
1457 _math_matrix_copy(&dst
->ViewportArray
[i
]._WindowMap
,
1458 &src
->ViewportArray
[i
]._WindowMap
);
1462 /* XXX FIXME: Call callbacks?
1464 dst
->NewState
= _NEW_ALL
;
1465 dst
->NewDriverState
= ~0;
1470 * Check if the given context can render into the given framebuffer
1471 * by checking visual attributes.
1473 * Most of these tests could go away because Mesa is now pretty flexible
1474 * in terms of mixing rendering contexts with framebuffers. As long
1475 * as RGB vs. CI mode agree, we're probably good.
1477 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1480 check_compatible(const struct gl_context
*ctx
,
1481 const struct gl_framebuffer
*buffer
)
1483 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1484 const struct gl_config
*bufvis
= &buffer
->Visual
;
1486 if (buffer
== _mesa_get_incomplete_framebuffer())
1490 /* disabling this fixes the fgl_glxgears pbuffer demo */
1491 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1494 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1496 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1498 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1500 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1502 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1504 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1506 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1509 /* disabled (see bug 11161) */
1510 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1513 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1521 * Check if the viewport/scissor size has not yet been initialized.
1522 * Initialize the size if the given width and height are non-zero.
1525 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1527 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1530 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1531 * potential infinite recursion.
1533 ctx
->ViewportInitialized
= GL_TRUE
;
1535 /* Note: ctx->Const.MaxViewports may not have been set by the driver
1536 * yet, so just initialize all of them.
1538 for (i
= 0; i
< MAX_VIEWPORTS
; i
++) {
1539 _mesa_set_viewport(ctx
, i
, 0, 0, width
, height
);
1540 _mesa_set_scissor(ctx
, i
, 0, 0, width
, height
);
1546 handle_first_current(struct gl_context
*ctx
)
1551 if (ctx
->Version
== 0) {
1552 /* probably in the process of tearing down the context */
1556 ctx
->Extensions
.String
= _mesa_make_extension_string(ctx
);
1558 check_context_limits(ctx
);
1560 /* According to GL_MESA_configless_context the default value of
1561 * glDrawBuffers depends on the config of the first surface it is bound to.
1562 * For GLES it is always GL_BACK which has a magic interpretation */
1563 if (!ctx
->HasConfig
&& _mesa_is_desktop_gl(ctx
)) {
1564 if (ctx
->DrawBuffer
!= _mesa_get_incomplete_framebuffer()) {
1565 if (ctx
->DrawBuffer
->Visual
.doubleBufferMode
)
1570 _mesa_drawbuffers(ctx
, 1, &buffer
, NULL
/* destMask */);
1573 if (ctx
->ReadBuffer
!= _mesa_get_incomplete_framebuffer()) {
1574 if (ctx
->ReadBuffer
->Visual
.doubleBufferMode
) {
1576 bufferIndex
= BUFFER_BACK_LEFT
;
1580 bufferIndex
= BUFFER_FRONT_LEFT
;
1583 _mesa_readbuffer(ctx
, buffer
, bufferIndex
);
1587 /* We can use this to help debug user's problems. Tell them to set
1588 * the MESA_INFO env variable before running their app. Then the
1589 * first time each context is made current we'll print some useful
1592 if (getenv("MESA_INFO")) {
1593 _mesa_print_info(ctx
);
1598 * Bind the given context to the given drawBuffer and readBuffer and
1599 * make it the current context for the calling thread.
1600 * We'll render into the drawBuffer and read pixels from the
1601 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1603 * We check that the context's and framebuffer's visuals are compatible
1604 * and return immediately if they're not.
1606 * \param newCtx the new GL context. If NULL then there will be no current GL
1608 * \param drawBuffer the drawing framebuffer
1609 * \param readBuffer the reading framebuffer
1612 _mesa_make_current( struct gl_context
*newCtx
,
1613 struct gl_framebuffer
*drawBuffer
,
1614 struct gl_framebuffer
*readBuffer
)
1616 GET_CURRENT_CONTEXT(curCtx
);
1618 if (MESA_VERBOSE
& VERBOSE_API
)
1619 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1621 /* Check that the context's and framebuffer's visuals are compatible.
1623 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1624 if (!check_compatible(newCtx
, drawBuffer
)) {
1625 _mesa_warning(newCtx
,
1626 "MakeCurrent: incompatible visuals for context and drawbuffer");
1630 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1631 if (!check_compatible(newCtx
, readBuffer
)) {
1632 _mesa_warning(newCtx
,
1633 "MakeCurrent: incompatible visuals for context and readbuffer");
1639 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1640 /* make sure this context is valid for flushing */
1642 curCtx
->Const
.ContextReleaseBehavior
==
1643 GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
)
1644 _mesa_flush(curCtx
);
1646 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1647 _glapi_set_context((void *) newCtx
);
1648 ASSERT(_mesa_get_current_context() == newCtx
);
1651 _glapi_set_dispatch(NULL
); /* none current */
1654 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1656 if (drawBuffer
&& readBuffer
) {
1657 ASSERT(_mesa_is_winsys_fbo(drawBuffer
));
1658 ASSERT(_mesa_is_winsys_fbo(readBuffer
));
1659 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1660 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1663 * Only set the context's Draw/ReadBuffer fields if they're NULL
1664 * or not bound to a user-created FBO.
1666 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1667 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1668 /* Update the FBO's list of drawbuffers/renderbuffers.
1669 * For winsys FBOs this comes from the GL state (which may have
1670 * changed since the last time this FBO was bound).
1672 _mesa_update_draw_buffers(newCtx
);
1674 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1675 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1678 /* XXX only set this flag if we're really changing the draw/read
1679 * framebuffer bindings.
1681 newCtx
->NewState
|= _NEW_BUFFERS
;
1684 _mesa_check_init_viewport(newCtx
,
1685 drawBuffer
->Width
, drawBuffer
->Height
);
1689 if (newCtx
->FirstTimeCurrent
) {
1690 handle_first_current(newCtx
);
1691 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1700 * Make context 'ctx' share the display lists, textures and programs
1701 * that are associated with 'ctxToShare'.
1702 * Any display lists, textures or programs associated with 'ctx' will
1703 * be deleted if nobody else is sharing them.
1706 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1708 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1709 struct gl_shared_state
*oldShared
= NULL
;
1711 /* save ref to old state to prevent it from being deleted immediately */
1712 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1714 /* update ctx's Shared pointer */
1715 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1717 update_default_objects(ctx
);
1719 /* release the old shared state */
1720 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1732 * \return pointer to the current GL context for this thread.
1734 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1735 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1739 _mesa_get_current_context( void )
1741 return (struct gl_context
*) _glapi_get_context();
1746 * Get context's current API dispatch table.
1748 * It'll either be the immediate-mode execute dispatcher or the display list
1749 * compile dispatcher.
1751 * \param ctx GL context.
1753 * \return pointer to dispatch_table.
1755 * Simply returns __struct gl_contextRec::CurrentDispatch.
1757 struct _glapi_table
*
1758 _mesa_get_dispatch(struct gl_context
*ctx
)
1760 return ctx
->CurrentDispatch
;
1766 /**********************************************************************/
1767 /** \name Miscellaneous functions */
1768 /**********************************************************************/
1774 * \param ctx GL context.
1775 * \param error error code.
1777 * Records the given error code and call the driver's dd_function_table::Error
1778 * function if defined.
1781 * This is called via _mesa_error().
1784 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1789 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1790 ctx
->ErrorValue
= error
;
1796 * Flush commands and wait for completion.
1799 _mesa_finish(struct gl_context
*ctx
)
1801 FLUSH_VERTICES( ctx
, 0 );
1802 FLUSH_CURRENT( ctx
, 0 );
1803 if (ctx
->Driver
.Finish
) {
1804 ctx
->Driver
.Finish(ctx
);
1813 _mesa_flush(struct gl_context
*ctx
)
1815 FLUSH_VERTICES( ctx
, 0 );
1816 FLUSH_CURRENT( ctx
, 0 );
1817 if (ctx
->Driver
.Flush
) {
1818 ctx
->Driver
.Flush(ctx
);
1825 * Execute glFinish().
1827 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1828 * dd_function_table::Finish driver callback, if not NULL.
1833 GET_CURRENT_CONTEXT(ctx
);
1834 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1840 * Execute glFlush().
1842 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1843 * dd_function_table::Flush driver callback, if not NULL.
1848 GET_CURRENT_CONTEXT(ctx
);
1849 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1855 * ARB_blend_func_extended - ERRORS section
1856 * "The error INVALID_OPERATION is generated by Begin or any procedure that
1857 * implicitly calls Begin if any draw buffer has a blend function requiring the
1858 * second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, SRC1_ALPHA or
1859 * ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that has more than
1860 * the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active color attachements."
1863 _mesa_check_blend_func_error(struct gl_context
*ctx
)
1866 for (i
= ctx
->Const
.MaxDualSourceDrawBuffers
;
1867 i
< ctx
->DrawBuffer
->_NumColorDrawBuffers
;
1869 if (ctx
->Color
.Blend
[i
]._UsesDualSrc
) {
1870 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1871 "dual source blend on illegal attachment");
1879 shader_linked_or_absent(struct gl_context
*ctx
,
1880 const struct gl_shader_program
*shProg
,
1881 bool *shader_present
, const char *where
)
1884 *shader_present
= true;
1886 if (!shProg
->LinkStatus
) {
1887 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(shader not linked)", where
);
1890 #if 0 /* not normally enabled */
1893 if (!_mesa_validate_shader_program(ctx
, shProg
, errMsg
)) {
1894 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1895 shProg
->Name
, errMsg
);
1905 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1906 * is called to see if it's valid to render. This involves checking that
1907 * the current shader is valid and the framebuffer is complete.
1908 * It also check the current pipeline object is valid if any.
1909 * If an error is detected it'll be recorded here.
1910 * \return GL_TRUE if OK to render, GL_FALSE if not
1913 _mesa_valid_to_render(struct gl_context
*ctx
, const char *where
)
1917 /* This depends on having up to date derived state (shaders) */
1919 _mesa_update_state(ctx
);
1921 if (ctx
->API
== API_OPENGL_CORE
|| ctx
->API
== API_OPENGLES2
) {
1922 bool from_glsl_shader
[MESA_SHADER_COMPUTE
] = { false };
1924 for (i
= 0; i
< MESA_SHADER_COMPUTE
; i
++) {
1925 if (!shader_linked_or_absent(ctx
, ctx
->_Shader
->CurrentProgram
[i
],
1926 &from_glsl_shader
[i
], where
))
1930 /* In OpenGL Core Profile and OpenGL ES 2.0 / 3.0, there are no assembly
1931 * shaders. Don't check state related to those.
1934 bool has_vertex_shader
= false;
1935 bool has_fragment_shader
= false;
1937 /* In OpenGL Compatibility Profile, there is only vertex shader and
1938 * fragment shader. We take this path also for API_OPENGLES because
1939 * optimizing that path would make the other (more common) paths
1942 if (!shader_linked_or_absent(ctx
,
1943 ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
],
1944 &has_vertex_shader
, where
))
1947 if (!shader_linked_or_absent(ctx
,
1948 ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
],
1949 &has_fragment_shader
, where
))
1952 /* Any shader stages that are not supplied by the GLSL shader and have
1953 * assembly shaders enabled must now be validated.
1955 if (!has_vertex_shader
1956 && ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1957 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1958 "%s(vertex program not valid)", where
);
1962 if (!has_fragment_shader
) {
1963 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1964 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1965 "%s(fragment program not valid)", where
);
1969 /* If drawing to integer-valued color buffers, there must be an
1970 * active fragment shader (GL_EXT_texture_integer).
1972 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->_IntegerColor
) {
1973 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1974 "%s(integer format but no fragment shader)", where
);
1980 /* A pipeline object is bound */
1981 if (ctx
->_Shader
->Name
&& !ctx
->_Shader
->Validated
) {
1982 /* Error message will be printed inside _mesa_validate_program_pipeline.
1984 if (!_mesa_validate_program_pipeline(ctx
, ctx
->_Shader
, GL_TRUE
)) {
1989 /* If a program is active and SSO not in use, check if validation of
1990 * samplers succeeded for the active program. */
1991 if (ctx
->_Shader
->ActiveProgram
&& ctx
->_Shader
!= ctx
->Pipeline
.Current
) {
1993 if (!_mesa_sampler_uniforms_are_valid(ctx
->_Shader
->ActiveProgram
,
1995 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", errMsg
);
2000 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
2001 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
2002 "%s(incomplete framebuffer)", where
);
2006 if (_mesa_check_blend_func_error(ctx
) == GL_FALSE
) {
2011 if (ctx
->_Shader
->Flags
& GLSL_LOG
) {
2012 struct gl_shader_program
**shProg
= ctx
->_Shader
->CurrentProgram
;
2015 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2016 if (shProg
[i
] == NULL
|| shProg
[i
]->_Used
2017 || shProg
[i
]->_LinkedShaders
[i
] == NULL
)
2020 /* This is the first time this shader is being used.
2021 * Append shader's constants/uniforms to log file.
2023 * Only log data for the program target that matches the shader
2024 * target. It's possible to have a program bound to the vertex
2025 * shader target that also supplied a fragment shader. If that
2026 * program isn't also bound to the fragment shader target we don't
2027 * want to log its fragment data.
2029 _mesa_append_uniforms_to_file(shProg
[i
]->_LinkedShaders
[i
]);
2032 for (i
= 0; i
< MESA_SHADER_STAGES
; i
++) {
2033 if (shProg
[i
] != NULL
)
2034 shProg
[i
]->_Used
= GL_TRUE
;