2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR 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.
80 #include "mfeatures.h"
87 #if FEATURE_attrib_stack
92 #include "bufferobj.h"
93 #if FEATURE_colortable
103 #if FEATURE_evaluators
107 #include "extensions.h"
108 #include "fbobject.h"
110 #include "feedback.h"
113 #include "framebuffer.h"
115 #if FEATURE_histogram
116 #include "histogram.h"
124 #include "multisample.h"
126 #include "pixelstore.h"
129 #if FEATURE_ARB_occlusion_query
130 #include "queryobj.h"
137 #include "simple_list.h"
140 #include "texcompress.h"
141 #include "teximage.h"
143 #include "texstate.h"
147 #include "viewport.h"
149 #include "glapi/glthread.h"
150 #include "glapi/glapioffsets.h"
151 #include "glapi/glapitable.h"
152 #include "shader/program.h"
153 #include "shader/shader_api.h"
154 #if FEATURE_ATI_fragment_shader
155 #include "shader/atifragshader.h"
158 #include "math/m_matrix.h"
162 #include "sparc/sparc.h"
166 int MESA_VERBOSE
= 0;
169 #ifndef MESA_DEBUG_FLAGS
170 int MESA_DEBUG_FLAGS
= 0;
174 /* ubyte -> float conversion */
175 GLfloat _mesa_ubyte_to_float_color_tab
[256];
180 * Swap buffers notification callback.
182 * \param ctx GL context.
184 * Called by window system just before swapping buffers.
185 * We have to finish any pending rendering.
188 _mesa_notifySwapBuffers(__GLcontext
*ctx
)
190 FLUSH_CURRENT( ctx
, 0 );
191 if (ctx
->Driver
.Flush
) {
192 ctx
->Driver
.Flush(ctx
);
197 /**********************************************************************/
198 /** \name GL Visual allocation/destruction */
199 /**********************************************************************/
203 * Allocates a GLvisual structure and initializes it via
204 * _mesa_initialize_visual().
206 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
207 * \param dbFlag double buffering
208 * \param stereoFlag stereo buffer
209 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
210 * is acceptable but the actual depth type will be GLushort or GLuint as
212 * \param stencilBits requested minimum bits per stencil buffer value
213 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
214 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
215 * \param redBits number of bits per color component in frame buffer for RGB(A)
216 * mode. We always use 8 in core Mesa though.
217 * \param greenBits same as above.
218 * \param blueBits same as above.
219 * \param alphaBits same as above.
220 * \param numSamples not really used.
222 * \return pointer to new GLvisual or NULL if requested parameters can't be
225 * \note Need to add params for level and numAuxBuffers (at least)
228 _mesa_create_visual( GLboolean rgbFlag
,
230 GLboolean stereoFlag
,
239 GLint accumGreenBits
,
241 GLint accumAlphaBits
,
244 GLvisual
*vis
= (GLvisual
*) _mesa_calloc(sizeof(GLvisual
));
246 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
247 redBits
, greenBits
, blueBits
, alphaBits
,
248 indexBits
, depthBits
, stencilBits
,
249 accumRedBits
, accumGreenBits
,
250 accumBlueBits
, accumAlphaBits
,
260 * Makes some sanity checks and fills in the fields of the
261 * GLvisual object with the given parameters. If the caller needs
262 * to set additional fields, he should just probably init the whole GLvisual
264 * \return GL_TRUE on success, or GL_FALSE on failure.
266 * \sa _mesa_create_visual() above for the parameter description.
269 _mesa_initialize_visual( GLvisual
*vis
,
272 GLboolean stereoFlag
,
281 GLint accumGreenBits
,
283 GLint accumAlphaBits
,
288 if (depthBits
< 0 || depthBits
> 32) {
291 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
294 assert(accumRedBits
>= 0);
295 assert(accumGreenBits
>= 0);
296 assert(accumBlueBits
>= 0);
297 assert(accumAlphaBits
>= 0);
299 vis
->rgbMode
= rgbFlag
;
300 vis
->doubleBufferMode
= dbFlag
;
301 vis
->stereoMode
= stereoFlag
;
303 vis
->redBits
= redBits
;
304 vis
->greenBits
= greenBits
;
305 vis
->blueBits
= blueBits
;
306 vis
->alphaBits
= alphaBits
;
307 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
309 vis
->indexBits
= indexBits
;
310 vis
->depthBits
= depthBits
;
311 vis
->stencilBits
= stencilBits
;
313 vis
->accumRedBits
= accumRedBits
;
314 vis
->accumGreenBits
= accumGreenBits
;
315 vis
->accumBlueBits
= accumBlueBits
;
316 vis
->accumAlphaBits
= accumAlphaBits
;
318 vis
->haveAccumBuffer
= accumRedBits
> 0;
319 vis
->haveDepthBuffer
= depthBits
> 0;
320 vis
->haveStencilBuffer
= stencilBits
> 0;
322 vis
->numAuxBuffers
= 0;
325 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
326 vis
->samples
= numSamples
;
333 * Destroy a visual and free its memory.
337 * Frees the visual structure.
340 _mesa_destroy_visual( GLvisual
*vis
)
348 /**********************************************************************/
349 /** \name Context allocation, initialization, destroying
351 * The purpose of the most initialization functions here is to provide the
352 * default state values according to the OpenGL specification.
354 /**********************************************************************/
359 * This is lame. gdb only seems to recognize enum types that are
360 * actually used somewhere. We want to be able to print/use enum
361 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
362 * the gl_texture_index type anywhere. Thus, this lame function.
365 dummy_enum_func(void)
368 gl_colortable_index ci
;
388 * One-time initialization mutex lock.
390 * \sa Used by one_time_init().
392 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
395 * Calls all the various one-time-init functions in Mesa.
397 * While holding a global mutex lock, calls several initialization functions,
398 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
404 one_time_init( GLcontext
*ctx
)
406 static GLboolean alreadyCalled
= GL_FALSE
;
408 _glthread_LOCK_MUTEX(OneTimeLock
);
409 if (!alreadyCalled
) {
412 /* do some implementation tests */
413 assert( sizeof(GLbyte
) == 1 );
414 assert( sizeof(GLubyte
) == 1 );
415 assert( sizeof(GLshort
) == 2 );
416 assert( sizeof(GLushort
) == 2 );
417 assert( sizeof(GLint
) == 4 );
418 assert( sizeof(GLuint
) == 4 );
420 _mesa_get_cpu_features();
422 _mesa_init_sqrt_table();
424 for (i
= 0; i
< 256; i
++) {
425 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
428 if (_mesa_getenv("MESA_DEBUG")) {
429 _glapi_noop_enable_warnings(GL_TRUE
);
430 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
433 _glapi_noop_enable_warnings(GL_FALSE
);
436 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
437 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
438 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
441 alreadyCalled
= GL_TRUE
;
443 _glthread_UNLOCK_MUTEX(OneTimeLock
);
450 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
453 _mesa_init_current(GLcontext
*ctx
)
457 /* Init all to (0,0,0,1) */
458 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
459 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
462 /* redo special cases: */
463 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
464 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
465 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
466 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
467 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
468 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
473 * Init vertex/fragment program limits.
474 * Important: drivers should override these with actual limits.
477 init_program_limits(GLenum type
, struct gl_program_constants
*prog
)
479 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
480 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
481 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
482 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
483 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
484 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
485 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
486 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
488 if (type
== GL_VERTEX_PROGRAM_ARB
) {
489 prog
->MaxParameters
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
490 prog
->MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
491 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
494 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
495 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
496 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
499 /* copy the above limits to init native limits */
500 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
501 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
502 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
503 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
504 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
505 prog
->MaxNativeTemps
= prog
->MaxTemps
;
506 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
507 prog
->MaxNativeParameters
= prog
->MaxParameters
;
512 * Initialize fields of gl_constants (aka ctx->Const.*).
513 * Use defaults from config.h. The device drivers will often override
514 * some of these values (such as number of texture units).
517 _mesa_init_constants(GLcontext
*ctx
)
521 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
522 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
524 /* Max texture size should be <= max viewport size (render to texture) */
525 assert((1 << (MAX_TEXTURE_LEVELS
- 1)) <= MAX_WIDTH
);
527 /* Constants, may be overriden (usually only reduced) by device drivers */
528 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
529 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
530 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
531 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
532 ctx
->Const
.MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
533 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
534 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
535 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
536 ctx
->Const
.MaxTextureImageUnits
);
537 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
538 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
539 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
540 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
541 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
542 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
543 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
544 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
545 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
546 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
547 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
548 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
549 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
550 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
551 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
552 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
553 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
554 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
555 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
556 ctx
->Const
.MaxShininess
= 128.0;
557 ctx
->Const
.MaxSpotExponent
= 128.0;
558 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
559 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
560 #if FEATURE_ARB_vertex_program
561 init_program_limits(GL_VERTEX_PROGRAM_ARB
, &ctx
->Const
.VertexProgram
);
563 #if FEATURE_ARB_fragment_program
564 init_program_limits(GL_FRAGMENT_PROGRAM_ARB
, &ctx
->Const
.FragmentProgram
);
566 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
567 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
569 /* CheckArrayBounds is overriden by drivers/x11 for X server */
570 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
572 /* GL_ARB_draw_buffers */
573 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
575 /* GL_OES_read_format */
576 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
577 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
579 #if FEATURE_EXT_framebuffer_object
580 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
581 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
584 #if FEATURE_ARB_vertex_shader
585 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
586 ctx
->Const
.MaxVarying
= MAX_VARYING
;
589 /* GL_ARB_framebuffer_object */
590 ctx
->Const
.MaxSamples
= 0;
592 /* GL_ATI_envmap_bumpmap */
593 ctx
->Const
.SupportedBumpUnits
= SUPPORTED_ATI_BUMP_UNITS
;
595 /* GL_EXT_provoking_vertex */
596 ctx
->Const
.QuadsFollowProvokingVertexConvention
= GL_TRUE
;
599 ASSERT(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
600 ctx
->Const
.MaxTextureCoordUnits
));
601 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
602 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
604 ASSERT(MAX_NV_FRAGMENT_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
605 ASSERT(MAX_NV_VERTEX_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
606 ASSERT(MAX_NV_VERTEX_PROGRAM_INPUTS
<= VERT_ATTRIB_MAX
);
607 ASSERT(MAX_NV_VERTEX_PROGRAM_OUTPUTS
<= VERT_RESULT_MAX
);
609 /* check that we don't exceed various 32-bit bitfields */
610 ASSERT(VERT_RESULT_MAX
<= 32);
611 ASSERT(FRAG_ATTRIB_MAX
<= 32);
616 * Do some sanity checks on the limits/constants for the given context.
617 * Only called the first time a context is bound.
620 check_context_limits(GLcontext
*ctx
)
622 /* Many context limits/constants are limited by the size of
625 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
626 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
627 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
628 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
630 /* number of coord units cannot be greater than number of image units */
631 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.MaxTextureImageUnits
);
633 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
634 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
635 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
636 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
638 /* make sure largest texture image is <= MAX_WIDTH in size */
639 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= MAX_WIDTH
);
640 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= MAX_WIDTH
);
641 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= MAX_WIDTH
);
643 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
644 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
646 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
648 /* XXX probably add more tests */
653 * Initialize the attribute groups in a GL context.
655 * \param ctx GL context.
657 * Initializes all the attributes, calling the respective <tt>init*</tt>
658 * functions for the more complex data structures.
661 init_attrib_groups(GLcontext
*ctx
)
666 _mesa_init_constants( ctx
);
669 _mesa_init_extensions( ctx
);
671 /* Attribute Groups */
673 _mesa_init_accum( ctx
);
675 #if FEATURE_attrib_stack
676 _mesa_init_attrib( ctx
);
678 _mesa_init_buffer_objects( ctx
);
679 _mesa_init_color( ctx
);
680 #if FEATURE_colortable
681 _mesa_init_colortables( ctx
);
683 _mesa_init_current( ctx
);
684 _mesa_init_depth( ctx
);
685 _mesa_init_debug( ctx
);
687 _mesa_init_display_list( ctx
);
689 #if FEATURE_evaluators
690 _mesa_init_eval( ctx
);
692 _mesa_init_fbobjects( ctx
);
694 _mesa_init_feedback( ctx
);
696 ctx
->RenderMode
= GL_RENDER
;
698 _mesa_init_fog( ctx
);
699 #if FEATURE_histogram
700 _mesa_init_histogram( ctx
);
702 _mesa_init_hint( ctx
);
703 _mesa_init_line( ctx
);
704 _mesa_init_lighting( ctx
);
705 _mesa_init_matrix( ctx
);
706 _mesa_init_multisample( ctx
);
707 _mesa_init_pixel( ctx
);
708 _mesa_init_pixelstore( ctx
);
709 _mesa_init_point( ctx
);
710 _mesa_init_polygon( ctx
);
711 _mesa_init_program( ctx
);
712 #if FEATURE_ARB_occlusion_query
713 _mesa_init_query( ctx
);
716 _mesa_init_rastpos( ctx
);
718 _mesa_init_scissor( ctx
);
719 _mesa_init_shader_state( ctx
);
720 _mesa_init_stencil( ctx
);
721 _mesa_init_transform( ctx
);
722 _mesa_init_varray( ctx
);
723 _mesa_init_viewport( ctx
);
725 if (!_mesa_init_texture( ctx
))
728 #if FEATURE_texture_s3tc
729 _mesa_init_texture_s3tc( ctx
);
731 #if FEATURE_texture_fxt1
732 _mesa_init_texture_fxt1( ctx
);
736 ctx
->NewState
= _NEW_ALL
;
737 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
738 ctx
->varying_vp_inputs
= ~0;
745 * Update default objects in a GL context with respect to shared state.
747 * \param ctx GL context.
749 * Removes references to old default objects, (texture objects, program
750 * objects, etc.) and changes to reference those from the current shared
754 update_default_objects(GLcontext
*ctx
)
758 _mesa_update_default_objects_program(ctx
);
759 _mesa_update_default_objects_texture(ctx
);
760 _mesa_update_default_objects_buffer_objects(ctx
);
767 * This is the default function we plug into all dispatch table slots
768 * This helps prevents a segfault when someone calls a GL function without
769 * first checking if the extension's supported.
774 _mesa_warning(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
780 * Allocate and initialize a new dispatch table.
782 static struct _glapi_table
*
783 alloc_dispatch_table(void)
785 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
786 * In practice, this'll be the same for stand-alone Mesa. But for DRI
787 * Mesa we do this to accomodate different versions of libGL and various
790 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
791 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
792 struct _glapi_table
*table
=
793 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
795 _glapi_proc
*entry
= (_glapi_proc
*) table
;
797 for (i
= 0; i
< numEntries
; i
++) {
798 entry
[i
] = (_glapi_proc
) generic_nop
;
806 * Initialize a GLcontext struct (rendering context).
808 * This includes allocating all the other structs and arrays which hang off of
809 * the context by pointers.
810 * Note that the driver needs to pass in its dd_function_table here since
811 * we need to at least call driverFunctions->NewTextureObject to create the
812 * default texture objects.
814 * Called by _mesa_create_context().
816 * Performs the imports and exports callback tables initialization, and
817 * miscellaneous one-time initializations. If no shared context is supplied one
818 * is allocated, and increase its reference count. Setups the GL API dispatch
819 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
820 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
823 * \param ctx the context to initialize
824 * \param visual describes the visual attributes for this context
825 * \param share_list points to context to share textures, display lists,
827 * \param driverFunctions table of device driver functions for this context
829 * \param driverContext pointer to driver-specific context data
832 _mesa_initialize_context(GLcontext
*ctx
,
833 const GLvisual
*visual
,
834 GLcontext
*share_list
,
835 const struct dd_function_table
*driverFunctions
,
838 struct gl_shared_state
*shared
;
840 /*ASSERT(driverContext);*/
841 assert(driverFunctions
->NewTextureObject
);
842 assert(driverFunctions
->FreeTexImageData
);
844 /* misc one-time initializations */
847 ctx
->Visual
= *visual
;
848 ctx
->DrawBuffer
= NULL
;
849 ctx
->ReadBuffer
= NULL
;
850 ctx
->WinSysDrawBuffer
= NULL
;
851 ctx
->WinSysReadBuffer
= NULL
;
853 /* Plug in driver functions and context pointer here.
854 * This is important because when we call alloc_shared_state() below
855 * we'll call ctx->Driver.NewTextureObject() to create the default
858 ctx
->Driver
= *driverFunctions
;
859 ctx
->DriverCtx
= driverContext
;
862 /* share state with another context */
863 shared
= share_list
->Shared
;
866 /* allocate new, unshared state */
867 shared
= _mesa_alloc_shared_state(ctx
);
872 _glthread_LOCK_MUTEX(shared
->Mutex
);
873 ctx
->Shared
= shared
;
875 _glthread_UNLOCK_MUTEX(shared
->Mutex
);
877 if (!init_attrib_groups( ctx
)) {
878 _mesa_free_shared_state(ctx
, ctx
->Shared
);
882 /* setup the API dispatch tables */
883 ctx
->Exec
= alloc_dispatch_table();
884 ctx
->Save
= alloc_dispatch_table();
885 if (!ctx
->Exec
|| !ctx
->Save
) {
886 _mesa_free_shared_state(ctx
, ctx
->Shared
);
888 _mesa_free(ctx
->Exec
);
891 _mesa_init_exec_table(ctx
->Exec
);
893 ctx
->CurrentDispatch
= ctx
->Exec
;
895 _mesa_init_dlist_table(ctx
->Save
);
896 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
898 /* Neutral tnl module stuff */
899 _mesa_init_exec_vtxfmt( ctx
);
900 ctx
->TnlModule
.Current
= NULL
;
901 ctx
->TnlModule
.SwapCount
= 0;
903 ctx
->FragmentProgram
._MaintainTexEnvProgram
904 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
906 ctx
->VertexProgram
._MaintainTnlProgram
907 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
908 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
909 /* this is required... */
910 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
913 #ifdef FEATURE_extra_context_init
914 _mesa_initialize_context_extra(ctx
);
917 ctx
->FirstTimeCurrent
= GL_TRUE
;
924 * Allocate and initialize a GLcontext structure.
925 * Note that the driver needs to pass in its dd_function_table here since
926 * we need to at least call driverFunctions->NewTextureObject to initialize
927 * the rendering context.
929 * \param visual a GLvisual pointer (we copy the struct contents)
930 * \param share_list another context to share display lists with or NULL
931 * \param driverFunctions points to the dd_function_table into which the
932 * driver has plugged in all its special functions.
933 * \param driverContext points to the device driver's private context state
935 * \return pointer to a new __GLcontextRec or NULL if error.
938 _mesa_create_context(const GLvisual
*visual
,
939 GLcontext
*share_list
,
940 const struct dd_function_table
*driverFunctions
,
946 /*ASSERT(driverContext);*/
948 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
952 if (_mesa_initialize_context(ctx
, visual
, share_list
,
953 driverFunctions
, driverContext
)) {
964 * Free the data associated with the given context.
966 * But doesn't free the GLcontext struct itself.
968 * \sa _mesa_initialize_context() and init_attrib_groups().
971 _mesa_free_context_data( GLcontext
*ctx
)
975 if (!_mesa_get_current_context()){
976 /* No current context, but we may need one in order to delete
977 * texture objs, etc. So temporarily bind the context now.
979 _mesa_make_current(ctx
, NULL
, NULL
);
982 /* unreference WinSysDraw/Read buffers */
983 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
984 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
985 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
986 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
988 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
989 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
990 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
992 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
993 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
994 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
996 #if FEATURE_attrib_stack
997 _mesa_free_attrib_data(ctx
);
999 _mesa_free_lighting_data( ctx
);
1000 #if FEATURE_evaluators
1001 _mesa_free_eval_data( ctx
);
1003 _mesa_free_texture_data( ctx
);
1004 _mesa_free_matrix_data( ctx
);
1005 _mesa_free_viewport_data( ctx
);
1006 #if FEATURE_colortable
1007 _mesa_free_colortables_data( ctx
);
1009 _mesa_free_program_data(ctx
);
1010 _mesa_free_shader_state(ctx
);
1011 #if FEATURE_ARB_occlusion_query
1012 _mesa_free_query_data(ctx
);
1014 _mesa_free_varray_data(ctx
);
1016 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
1018 #if FEATURE_ARB_pixel_buffer_object
1019 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1020 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1023 #if FEATURE_ARB_vertex_buffer_object
1024 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1025 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ElementArrayBufferObj
, NULL
);
1028 /* free dispatch tables */
1029 _mesa_free(ctx
->Exec
);
1030 _mesa_free(ctx
->Save
);
1032 /* Shared context state (display lists, textures, etc) */
1033 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1034 RefCount
= --ctx
->Shared
->RefCount
;
1035 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1036 assert(RefCount
>= 0);
1037 if (RefCount
== 0) {
1038 /* free shared state */
1039 _mesa_free_shared_state( ctx
, ctx
->Shared
);
1042 if (ctx
->Extensions
.String
)
1043 _mesa_free((void *) ctx
->Extensions
.String
);
1045 /* unbind the context if it's currently bound */
1046 if (ctx
== _mesa_get_current_context()) {
1047 _mesa_make_current(NULL
, NULL
, NULL
);
1053 * Destroy a GLcontext structure.
1055 * \param ctx GL context.
1057 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1060 _mesa_destroy_context( GLcontext
*ctx
)
1063 _mesa_free_context_data(ctx
);
1064 _mesa_free( (void *) ctx
);
1071 * Copy attribute groups from one context to another.
1073 * \param src source context
1074 * \param dst destination context
1075 * \param mask bitwise OR of GL_*_BIT flags
1077 * According to the bits specified in \p mask, copies the corresponding
1078 * attributes from \p src into \p dst. For many of the attributes a simple \c
1079 * memcpy is not enough due to the existence of internal pointers in their data
1083 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1085 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1087 dst
->Accum
= src
->Accum
;
1089 if (mask
& GL_COLOR_BUFFER_BIT
) {
1091 dst
->Color
= src
->Color
;
1093 if (mask
& GL_CURRENT_BIT
) {
1095 dst
->Current
= src
->Current
;
1097 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1099 dst
->Depth
= src
->Depth
;
1101 if (mask
& GL_ENABLE_BIT
) {
1104 if (mask
& GL_EVAL_BIT
) {
1106 dst
->Eval
= src
->Eval
;
1108 if (mask
& GL_FOG_BIT
) {
1110 dst
->Fog
= src
->Fog
;
1112 if (mask
& GL_HINT_BIT
) {
1114 dst
->Hint
= src
->Hint
;
1116 if (mask
& GL_LIGHTING_BIT
) {
1118 /* begin with memcpy */
1119 dst
->Light
= src
->Light
;
1120 /* fixup linked lists to prevent pointer insanity */
1121 make_empty_list( &(dst
->Light
.EnabledList
) );
1122 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1123 if (dst
->Light
.Light
[i
].Enabled
) {
1124 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1128 if (mask
& GL_LINE_BIT
) {
1130 dst
->Line
= src
->Line
;
1132 if (mask
& GL_LIST_BIT
) {
1134 dst
->List
= src
->List
;
1136 if (mask
& GL_PIXEL_MODE_BIT
) {
1138 dst
->Pixel
= src
->Pixel
;
1140 if (mask
& GL_POINT_BIT
) {
1142 dst
->Point
= src
->Point
;
1144 if (mask
& GL_POLYGON_BIT
) {
1146 dst
->Polygon
= src
->Polygon
;
1148 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1149 /* Use loop instead of MEMCPY due to problem with Portland Group's
1150 * C compiler. Reported by John Stone.
1153 for (i
= 0; i
< 32; i
++) {
1154 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1157 if (mask
& GL_SCISSOR_BIT
) {
1159 dst
->Scissor
= src
->Scissor
;
1161 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1163 dst
->Stencil
= src
->Stencil
;
1165 if (mask
& GL_TEXTURE_BIT
) {
1166 /* Cannot memcpy because of pointers */
1167 _mesa_copy_texture_state(src
, dst
);
1169 if (mask
& GL_TRANSFORM_BIT
) {
1171 dst
->Transform
= src
->Transform
;
1173 if (mask
& GL_VIEWPORT_BIT
) {
1174 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1175 dst
->Viewport
.X
= src
->Viewport
.X
;
1176 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1177 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1178 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1179 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1180 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1181 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1184 /* XXX FIXME: Call callbacks?
1186 dst
->NewState
= _NEW_ALL
;
1192 * Check if the given context can render into the given framebuffer
1193 * by checking visual attributes.
1195 * Most of these tests could go away because Mesa is now pretty flexible
1196 * in terms of mixing rendering contexts with framebuffers. As long
1197 * as RGB vs. CI mode agree, we're probably good.
1199 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1202 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1204 const GLvisual
*ctxvis
= &ctx
->Visual
;
1205 const GLvisual
*bufvis
= &buffer
->Visual
;
1207 if (ctxvis
== bufvis
)
1210 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1213 /* disabling this fixes the fgl_glxgears pbuffer demo */
1214 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1217 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1219 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1221 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1223 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1225 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1227 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1229 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1232 /* disabled (see bug 11161) */
1233 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1236 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1244 * Do one-time initialization for the given framebuffer. Specifically,
1245 * ask the driver for the window's current size and update the framebuffer
1247 * Really, the device driver should totally take care of this.
1250 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1252 GLuint width
, height
;
1253 if (ctx
->Driver
.GetBufferSize
) {
1254 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1255 if (ctx
->Driver
.ResizeBuffers
)
1256 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1257 fb
->Initialized
= GL_TRUE
;
1263 * Check if the viewport/scissor size has not yet been initialized.
1264 * Initialize the size if the given width and height are non-zero.
1267 _mesa_check_init_viewport(GLcontext
*ctx
, GLuint width
, GLuint height
)
1269 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1270 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1271 * potential infinite recursion.
1273 ctx
->ViewportInitialized
= GL_TRUE
;
1274 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
1275 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
1281 * Bind the given context to the given drawBuffer and readBuffer and
1282 * make it the current context for the calling thread.
1283 * We'll render into the drawBuffer and read pixels from the
1284 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1286 * We check that the context's and framebuffer's visuals are compatible
1287 * and return immediately if they're not.
1289 * \param newCtx the new GL context. If NULL then there will be no current GL
1291 * \param drawBuffer the drawing framebuffer
1292 * \param readBuffer the reading framebuffer
1295 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1296 GLframebuffer
*readBuffer
)
1298 if (MESA_VERBOSE
& VERBOSE_API
)
1299 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1301 /* Check that the context's and framebuffer's visuals are compatible.
1303 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1304 if (!check_compatible(newCtx
, drawBuffer
)) {
1305 _mesa_warning(newCtx
,
1306 "MakeCurrent: incompatible visuals for context and drawbuffer");
1310 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1311 if (!check_compatible(newCtx
, readBuffer
)) {
1312 _mesa_warning(newCtx
,
1313 "MakeCurrent: incompatible visuals for context and readbuffer");
1318 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1319 _glapi_set_context((void *) newCtx
);
1320 ASSERT(_mesa_get_current_context() == newCtx
);
1323 _glapi_set_dispatch(NULL
); /* none current */
1326 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1328 if (drawBuffer
&& readBuffer
) {
1329 /* TODO: check if newCtx and buffer's visual match??? */
1331 ASSERT(drawBuffer
->Name
== 0);
1332 ASSERT(readBuffer
->Name
== 0);
1333 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1334 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1337 * Only set the context's Draw/ReadBuffer fields if they're NULL
1338 * or not bound to a user-created FBO.
1340 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1341 /* KW: merge conflict here, revisit.
1343 /* fix up the fb fields - these will end up wrong otherwise
1344 * if the DRIdrawable changes, and everything relies on them.
1345 * This is a bit messy (same as needed in _mesa_BindFramebufferEXT)
1348 GLenum buffers
[MAX_DRAW_BUFFERS
];
1350 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1352 for(i
= 0; i
< newCtx
->Const
.MaxDrawBuffers
; i
++) {
1353 buffers
[i
] = newCtx
->Color
.DrawBuffer
[i
];
1356 _mesa_drawbuffers(newCtx
, newCtx
->Const
.MaxDrawBuffers
, buffers
, NULL
);
1358 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1359 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1362 /* XXX only set this flag if we're really changing the draw/read
1363 * framebuffer bindings.
1365 newCtx
->NewState
|= _NEW_BUFFERS
;
1368 /* We want to get rid of these lines: */
1371 if (!drawBuffer
->Initialized
) {
1372 initialize_framebuffer_size(newCtx
, drawBuffer
);
1374 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1375 initialize_framebuffer_size(newCtx
, readBuffer
);
1378 _mesa_resizebuffers(newCtx
);
1382 /* We want the drawBuffer and readBuffer to be initialized by
1384 * This generally means the Width and Height match the actual
1385 * window size and the renderbuffers (both hardware and software
1386 * based) are allocated to match. The later can generally be
1387 * done with a call to _mesa_resize_framebuffer().
1389 * It's theoretically possible for a buffer to have zero width
1390 * or height, but for now, assert check that the driver did what's
1393 ASSERT(drawBuffer
->Width
> 0);
1394 ASSERT(drawBuffer
->Height
> 0);
1398 _mesa_check_init_viewport(newCtx
,
1399 drawBuffer
->Width
, drawBuffer
->Height
);
1403 if (newCtx
->FirstTimeCurrent
) {
1404 check_context_limits(newCtx
);
1406 /* We can use this to help debug user's problems. Tell them to set
1407 * the MESA_INFO env variable before running their app. Then the
1408 * first time each context is made current we'll print some useful
1411 if (_mesa_getenv("MESA_INFO")) {
1415 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1424 * Make context 'ctx' share the display lists, textures and programs
1425 * that are associated with 'ctxToShare'.
1426 * Any display lists, textures or programs associated with 'ctx' will
1427 * be deleted if nobody else is sharing them.
1430 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1432 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1433 struct gl_shared_state
*oldSharedState
= ctx
->Shared
;
1436 ctx
->Shared
= ctxToShare
->Shared
;
1438 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1439 ctx
->Shared
->RefCount
++;
1440 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1442 update_default_objects(ctx
);
1444 _glthread_LOCK_MUTEX(oldSharedState
->Mutex
);
1445 RefCount
= --oldSharedState
->RefCount
;
1446 _glthread_UNLOCK_MUTEX(oldSharedState
->Mutex
);
1448 if (RefCount
== 0) {
1449 _mesa_free_shared_state(ctx
, oldSharedState
);
1462 * \return pointer to the current GL context for this thread.
1464 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1465 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1469 _mesa_get_current_context( void )
1471 return (GLcontext
*) _glapi_get_context();
1476 * Get context's current API dispatch table.
1478 * It'll either be the immediate-mode execute dispatcher or the display list
1479 * compile dispatcher.
1481 * \param ctx GL context.
1483 * \return pointer to dispatch_table.
1485 * Simply returns __GLcontextRec::CurrentDispatch.
1487 struct _glapi_table
*
1488 _mesa_get_dispatch(GLcontext
*ctx
)
1490 return ctx
->CurrentDispatch
;
1496 /**********************************************************************/
1497 /** \name Miscellaneous functions */
1498 /**********************************************************************/
1504 * \param ctx GL context.
1505 * \param error error code.
1507 * Records the given error code and call the driver's dd_function_table::Error
1508 * function if defined.
1511 * This is called via _mesa_error().
1514 _mesa_record_error(GLcontext
*ctx
, GLenum error
)
1519 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1520 ctx
->ErrorValue
= error
;
1523 /* Call device driver's error handler, if any. This is used on the Mac. */
1524 if (ctx
->Driver
.Error
) {
1525 ctx
->Driver
.Error(ctx
);
1531 * Execute glFinish().
1533 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1534 * dd_function_table::Finish driver callback, if not NULL.
1539 GET_CURRENT_CONTEXT(ctx
);
1540 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1541 FLUSH_CURRENT( ctx
, 0 );
1542 if (ctx
->Driver
.Finish
) {
1543 ctx
->Driver
.Finish(ctx
);
1549 * Execute glFlush().
1551 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1552 * dd_function_table::Flush driver callback, if not NULL.
1557 GET_CURRENT_CONTEXT(ctx
);
1558 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1559 FLUSH_CURRENT( ctx
, 0 );
1560 if (ctx
->Driver
.Flush
) {
1561 ctx
->Driver
.Flush(ctx
);
1567 * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over
1568 * MUL/MAD, or vice versa, call this function to register that.
1569 * Otherwise we default to MUL/MAD.
1572 _mesa_set_mvp_with_dp4( GLcontext
*ctx
,
1575 ctx
->mvp_with_dp4
= flag
;