3 * Mesa context/visual/framebuffer management functions.
8 * Mesa 3-D graphics library
11 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
13 * Permission is hereby granted, free of charge, to any person obtaining a
14 * copy of this software and associated documentation files (the "Software"),
15 * to deal in the Software without restriction, including without limitation
16 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
17 * and/or sell copies of the Software, and to permit persons to whom the
18 * Software is furnished to do so, subject to the following conditions:
20 * The above copyright notice and this permission notice shall be included
21 * in all copies or substantial portions of the Software.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
24 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
27 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
28 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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.
85 #include "bufferobj.h"
93 #include "extensions.h"
99 #include "glapioffsets.h"
100 #include "histogram.h"
111 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
115 #include "simple_list.h"
118 #include "texcompress.h"
119 #include "teximage.h"
121 #include "texstate.h"
126 #include "math/m_translate.h"
127 #include "math/m_matrix.h"
128 #include "math/m_xform.h"
129 #include "math/mathmod.h"
131 #include "shaderobjects.h"
134 #include "sparc/sparc.h"
138 int MESA_VERBOSE
= 0;
141 #ifndef MESA_DEBUG_FLAGS
142 int MESA_DEBUG_FLAGS
= 0;
146 /* ubyte -> float conversion */
147 GLfloat _mesa_ubyte_to_float_color_tab
[256];
150 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
);
153 /**********************************************************************/
154 /** \name OpenGL SI-style interface (new in Mesa 3.5)
157 * \note Most of these functions are never called in the Mesa subset.
163 * Destroy context callback.
166 * \return GL_TRUE on success, or GL_FALSE on failure.
169 * Called by window system/device driver (via __GLexports::destroyCurrent) when
170 * the rendering context is to be destroyed.
173 * Frees the context data and the context structure.
176 _mesa_destroyContext(__GLcontext
*gc
)
179 _mesa_free_context_data(gc
);
186 * Unbind context callback.
189 * \return GL_TRUE on success, or GL_FALSE on failure.
192 * Called by window system/device driver (via __GLexports::loseCurrent)
193 * when the rendering context is made non-current.
199 _mesa_loseCurrent(__GLcontext
*gc
)
201 /* XXX unbind context from thread */
207 * Bind context callback.
210 * \return GL_TRUE on success, or GL_FALSE on failure.
213 * Called by window system/device driver (via __GLexports::makeCurrent)
214 * when the rendering context is made current.
220 _mesa_makeCurrent(__GLcontext
*gc
)
222 /* XXX bind context to thread */
228 * Share context callback.
231 * \param gcShare shared context.
232 * \return GL_TRUE on success, or GL_FALSE on failure.
235 * Called by window system/device driver (via __GLexports::shareContext)
238 * Update the shared context reference count, gl_shared_state::RefCount.
241 _mesa_shareContext(__GLcontext
*gc
, __GLcontext
*gcShare
)
243 if (gc
&& gcShare
&& gc
->Shared
&& gcShare
->Shared
) {
244 gc
->Shared
->RefCount
--;
245 if (gc
->Shared
->RefCount
== 0) {
246 free_shared_state(gc
, gc
->Shared
);
248 gc
->Shared
= gcShare
->Shared
;
249 gc
->Shared
->RefCount
++;
260 * Copy context callback.
263 _mesa_copyContext(__GLcontext
*dst
, const __GLcontext
*src
, GLuint mask
)
266 _mesa_copy_context( src
, dst
, mask
);
277 _mesa_forceCurrent(__GLcontext
*gc
)
284 * Windows/buffer resizing notification callback.
286 * \param gc GL context.
287 * \return GL_TRUE on success, or GL_FALSE on failure.
290 _mesa_notifyResize(__GLcontext
*gc
)
293 GLuint width
, height
;
294 __GLdrawablePrivate
*d
= gc
->imports
.getDrawablePrivate(gc
);
295 if (!d
|| !d
->getDrawableSize
)
297 d
->getDrawableSize( d
, &x
, &y
, &width
, &height
);
298 /* update viewport, resize software buffers, etc. */
303 * Window/buffer destruction notification callback.
305 * \param gc GL context.
307 * Called when the context's window/buffer is going to be destroyed.
312 _mesa_notifyDestroy(__GLcontext
*gc
)
314 /* Unbind from it. */
319 * Swap buffers notification callback.
321 * \param gc GL context.
323 * Called by window system just before swapping buffers.
324 * We have to finish any pending rendering.
327 _mesa_notifySwapBuffers(__GLcontext
*gc
)
329 FLUSH_VERTICES( gc
, 0 );
333 struct __GLdispatchStateRec
*
334 _mesa_dispatchExec(__GLcontext
*gc
)
342 _mesa_beginDispatchOverride(__GLcontext
*gc
)
349 _mesa_endDispatchOverride(__GLcontext
*gc
)
358 * The window system will call these functions when it needs Mesa to do
361 * \note Device drivers should override these functions! For example,
362 * the Xlib driver should plug in the XMesa*-style functions into this
363 * structure. The XMesa-style functions should then call the _mesa_*
364 * version of these functions. This is an approximation to OO design
365 * (inheritance and virtual functions).
374 _mesa_init_default_exports(__GLexports
*exports
)
377 exports
->destroyContext
= _mesa_destroyContext
;
378 exports
->loseCurrent
= _mesa_loseCurrent
;
379 exports
->makeCurrent
= _mesa_makeCurrent
;
380 exports
->shareContext
= _mesa_shareContext
;
381 exports
->copyContext
= _mesa_copyContext
;
382 exports
->forceCurrent
= _mesa_forceCurrent
;
383 exports
->notifyResize
= _mesa_notifyResize
;
384 exports
->notifyDestroy
= _mesa_notifyDestroy
;
385 exports
->notifySwapBuffers
= _mesa_notifySwapBuffers
;
386 exports
->dispatchExec
= _mesa_dispatchExec
;
387 exports
->beginDispatchOverride
= _mesa_beginDispatchOverride
;
388 exports
->endDispatchOverride
= _mesa_endDispatchOverride
;
395 * Exported OpenGL SI interface.
398 __glCoreCreateContext(__GLimports
*imports
, __GLcontextModes
*modes
)
402 ctx
= (GLcontext
*) (*imports
->calloc
)(NULL
, 1, sizeof(GLcontext
));
407 /* XXX doesn't work at this time */
408 _mesa_initialize_context(ctx
, modes
, NULL
, NULL
, NULL
);
409 ctx
->imports
= *imports
;
415 * Exported OpenGL SI interface.
418 __glCoreNopDispatch(void)
422 __gl_dispatch
= __glNopDispatchState
;
425 _glapi_set_dispatch(NULL
);
432 /**********************************************************************/
433 /** \name GL Visual allocation/destruction */
434 /**********************************************************************/
438 * Allocates a GLvisual structure and initializes it via
439 * _mesa_initialize_visual().
441 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
442 * \param dbFlag double buffering
443 * \param stereoFlag stereo buffer
444 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
445 * is acceptable but the actual depth type will be GLushort or GLuint as
447 * \param stencilBits requested minimum bits per stencil buffer value
448 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
449 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
450 * \param redBits number of bits per color component in frame buffer for RGB(A)
451 * mode. We always use 8 in core Mesa though.
452 * \param greenBits same as above.
453 * \param blueBits same as above.
454 * \param alphaBits same as above.
455 * \param numSamples not really used.
457 * \return pointer to new GLvisual or NULL if requested parameters can't be
460 * \note Need to add params for level and numAuxBuffers (at least)
463 _mesa_create_visual( GLboolean rgbFlag
,
465 GLboolean stereoFlag
,
474 GLint accumGreenBits
,
476 GLint accumAlphaBits
,
479 GLvisual
*vis
= (GLvisual
*) CALLOC( sizeof(GLvisual
) );
481 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
482 redBits
, greenBits
, blueBits
, alphaBits
,
483 indexBits
, depthBits
, stencilBits
,
484 accumRedBits
, accumGreenBits
,
485 accumBlueBits
, accumAlphaBits
,
495 * Makes some sanity checks and fills in the fields of the
496 * GLvisual object with the given parameters. If the caller needs
497 * to set additional fields, he should just probably init the whole GLvisual
499 * \return GL_TRUE on success, or GL_FALSE on failure.
501 * \sa _mesa_create_visual() above for the parameter description.
504 _mesa_initialize_visual( GLvisual
*vis
,
507 GLboolean stereoFlag
,
516 GLint accumGreenBits
,
518 GLint accumAlphaBits
,
523 if (depthBits
< 0 || depthBits
> 32) {
526 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
529 if (accumRedBits
< 0 || accumRedBits
> ACCUM_BITS
) {
532 if (accumGreenBits
< 0 || accumGreenBits
> ACCUM_BITS
) {
535 if (accumBlueBits
< 0 || accumBlueBits
> ACCUM_BITS
) {
538 if (accumAlphaBits
< 0 || accumAlphaBits
> ACCUM_BITS
) {
542 vis
->rgbMode
= rgbFlag
;
543 vis
->doubleBufferMode
= dbFlag
;
544 vis
->stereoMode
= stereoFlag
;
546 vis
->redBits
= redBits
;
547 vis
->greenBits
= greenBits
;
548 vis
->blueBits
= blueBits
;
549 vis
->alphaBits
= alphaBits
;
550 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
552 vis
->indexBits
= indexBits
;
553 vis
->depthBits
= depthBits
;
554 vis
->stencilBits
= stencilBits
;
556 vis
->accumRedBits
= accumRedBits
;
557 vis
->accumGreenBits
= accumGreenBits
;
558 vis
->accumBlueBits
= accumBlueBits
;
559 vis
->accumAlphaBits
= accumAlphaBits
;
561 vis
->haveAccumBuffer
= accumRedBits
> 0;
562 vis
->haveDepthBuffer
= depthBits
> 0;
563 vis
->haveStencilBuffer
= stencilBits
> 0;
565 vis
->numAuxBuffers
= 0;
568 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
569 vis
->samples
= numSamples
;
576 * Destroy a visual and free its memory.
580 * Frees the visual structure.
583 _mesa_destroy_visual( GLvisual
*vis
)
591 /**********************************************************************/
592 /** \name Context allocation, initialization, destroying
594 * The purpose of the most initialization functions here is to provide the
595 * default state values according to the OpenGL specification.
597 /**********************************************************************/
601 * One-time initialization mutex lock.
603 * \sa Used by one_time_init().
605 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
608 * Calls all the various one-time-init functions in Mesa.
610 * While holding a global mutex lock, calls several initialization functions,
611 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
614 * \sa _mesa_init_lists(), _math_init().
617 one_time_init( GLcontext
*ctx
)
619 static GLboolean alreadyCalled
= GL_FALSE
;
621 _glthread_LOCK_MUTEX(OneTimeLock
);
622 if (!alreadyCalled
) {
625 /* do some implementation tests */
626 assert( sizeof(GLbyte
) == 1 );
627 assert( sizeof(GLubyte
) == 1 );
628 assert( sizeof(GLshort
) == 2 );
629 assert( sizeof(GLushort
) == 2 );
630 assert( sizeof(GLint
) == 4 );
631 assert( sizeof(GLuint
) == 4 );
638 for (i
= 0; i
< 256; i
++) {
639 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
644 _mesa_init_sparc_glapi_relocs();
646 if (_mesa_getenv("MESA_DEBUG")) {
647 _glapi_noop_enable_warnings(GL_TRUE
);
648 #ifndef GLX_DIRECT_RENDERING
649 /* libGL from before 2002/06/28 don't have this function. Someday,
650 * when newer libGL libs are common, remove the #ifdef test. This
651 * only serves to print warnings when calling undefined GL functions.
653 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
657 _glapi_noop_enable_warnings(GL_FALSE
);
660 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
661 _mesa_debug(ctx
, "Mesa DEBUG build %s %s\n", __DATE__
, __TIME__
);
664 alreadyCalled
= GL_TRUE
;
666 _glthread_UNLOCK_MUTEX(OneTimeLock
);
671 * Allocate and initialize a shared context state structure.
672 * Initializes the display list, texture objects and vertex programs hash
673 * tables, allocates the texture objects. If it runs out of memory, frees
674 * everything already allocated before returning NULL.
676 * \return pointer to a gl_shared_state structure on success, or NULL on
680 alloc_shared_state( GLcontext
*ctx
)
682 struct gl_shared_state
*ss
= CALLOC_STRUCT(gl_shared_state
);
688 _glthread_INIT_MUTEX(ss
->Mutex
);
690 ss
->DisplayList
= _mesa_NewHashTable();
691 ss
->TexObjects
= _mesa_NewHashTable();
692 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
693 ss
->Programs
= _mesa_NewHashTable();
696 #if FEATURE_ARB_vertex_program
697 ss
->DefaultVertexProgram
= ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
698 if (!ss
->DefaultVertexProgram
)
701 #if FEATURE_ARB_fragment_program
702 ss
->DefaultFragmentProgram
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
703 if (!ss
->DefaultFragmentProgram
)
706 #if FEATURE_ATI_fragment_shader
707 ss
->DefaultFragmentShader
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_SHADER_ATI
, 0);
708 if (!ss
->DefaultFragmentShader
)
712 ss
->BufferObjects
= _mesa_NewHashTable();
714 ss
->GL2Objects
= _mesa_NewHashTable ();
716 ss
->Default1D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D
);
720 ss
->Default2D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D
);
724 ss
->Default3D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_3D
);
728 ss
->DefaultCubeMap
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_CUBE_MAP_ARB
);
729 if (!ss
->DefaultCubeMap
)
732 ss
->DefaultRect
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_RECTANGLE_NV
);
733 if (!ss
->DefaultRect
)
736 /* Effectively bind the default textures to all texture units */
737 ss
->Default1D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
738 ss
->Default2D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
739 ss
->Default3D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
740 ss
->DefaultCubeMap
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
741 ss
->DefaultRect
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
743 #if FEATURE_EXT_framebuffer_object
744 ss
->FrameBuffers
= _mesa_NewHashTable();
745 if (!ss
->FrameBuffers
)
747 ss
->RenderBuffers
= _mesa_NewHashTable();
748 if (!ss
->RenderBuffers
)
756 /* Ran out of memory at some point. Free everything and return NULL */
758 _mesa_DeleteHashTable(ss
->DisplayList
);
760 _mesa_DeleteHashTable(ss
->TexObjects
);
761 #if FEATURE_NV_vertex_program
763 _mesa_DeleteHashTable(ss
->Programs
);
765 #if FEATURE_ARB_vertex_program
766 if (ss
->DefaultVertexProgram
)
767 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
769 #if FEATURE_ARB_fragment_program
770 if (ss
->DefaultFragmentProgram
)
771 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
773 #if FEATURE_ATI_fragment_shader
774 if (ss
->DefaultFragmentShader
)
775 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentShader
);
777 #if FEATURE_ARB_vertex_buffer_object
778 if (ss
->BufferObjects
)
779 _mesa_DeleteHashTable(ss
->BufferObjects
);
783 _mesa_DeleteHashTable (ss
->GL2Objects
);
785 #if FEATURE_EXT_framebuffer_object
786 if (ss
->FrameBuffers
)
787 _mesa_DeleteHashTable(ss
->FrameBuffers
);
788 if (ss
->RenderBuffers
)
789 _mesa_DeleteHashTable(ss
->RenderBuffers
);
793 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
795 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
797 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
798 if (ss
->DefaultCubeMap
)
799 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
801 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
808 * Deallocate a shared state context and all children structures.
810 * \param ctx GL context.
811 * \param ss shared state pointer.
813 * Frees the display lists, the texture objects (calling the driver texture
814 * deletion callback to free its private data) and the vertex programs, as well
815 * as their hash tables.
817 * \sa alloc_shared_state().
820 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
)
822 /* Free display lists */
824 GLuint list
= _mesa_HashFirstEntry(ss
->DisplayList
);
826 _mesa_destroy_list(ctx
, list
);
832 _mesa_DeleteHashTable(ss
->DisplayList
);
834 /* Free texture objects */
835 ASSERT(ctx
->Driver
.DeleteTexture
);
836 /* the default textures */
837 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
838 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
839 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
840 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
841 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
842 /* all other textures */
844 GLuint texName
= _mesa_HashFirstEntry(ss
->TexObjects
);
846 struct gl_texture_object
*texObj
= (struct gl_texture_object
*)
847 _mesa_HashLookup(ss
->TexObjects
, texName
);
849 (*ctx
->Driver
.DeleteTexture
)(ctx
, texObj
);
850 _mesa_HashRemove(ss
->TexObjects
, texName
);
856 _mesa_DeleteHashTable(ss
->TexObjects
);
858 #if FEATURE_NV_vertex_program
859 /* Free vertex programs */
861 GLuint prog
= _mesa_HashFirstEntry(ss
->Programs
);
863 struct program
*p
= (struct program
*) _mesa_HashLookup(ss
->Programs
,
866 ctx
->Driver
.DeleteProgram(ctx
, p
);
867 _mesa_HashRemove(ss
->Programs
, prog
);
873 _mesa_DeleteHashTable(ss
->Programs
);
875 #if FEATURE_ARB_vertex_program
876 _mesa_delete_program(ctx
, ss
->DefaultVertexProgram
);
878 #if FEATURE_ARB_fragment_program
879 _mesa_delete_program(ctx
, ss
->DefaultFragmentProgram
);
881 #if FEATURE_ATI_fragment_shader
882 _mesa_delete_program(ctx
, ss
->DefaultFragmentShader
);
885 #if FEATURE_ARB_vertex_buffer_object
886 _mesa_DeleteHashTable(ss
->BufferObjects
);
889 _mesa_DeleteHashTable (ss
->GL2Objects
);
891 #if FEATURE_EXT_framebuffer_object
892 _mesa_DeleteHashTable(ss
->FrameBuffers
);
893 _mesa_DeleteHashTable(ss
->RenderBuffers
);
896 _glthread_DESTROY_MUTEX(ss
->Mutex
);
903 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
906 _mesa_init_current( GLcontext
*ctx
)
911 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
912 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
915 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 1.0 );
916 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
917 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
918 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
919 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
], 0.0, 0.0, 0.0, 0.0 );
921 ctx
->Current
.Index
= 1;
922 ctx
->Current
.EdgeFlag
= GL_TRUE
;
927 * Initialize fields of gl_constants (aka ctx->Const.*).
928 * Use defaults from config.h. The device drivers will often override
929 * some of these values (such as number of texture units).
932 _mesa_init_constants( GLcontext
*ctx
)
936 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
937 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
939 /* Constants, may be overriden (usually only reduced) by device drivers */
940 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
941 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
942 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
943 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
944 ctx
->Const
.MaxTextureUnits
= MAX_TEXTURE_UNITS
;
945 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
946 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
947 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
948 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
949 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
950 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
951 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
952 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
953 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
954 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
955 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
956 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
957 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
958 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
959 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
960 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
961 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
962 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
963 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
964 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
965 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
966 ctx
->Const
.MaxShininess
= 128.0;
967 ctx
->Const
.MaxSpotExponent
= 128.0;
968 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
969 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
970 #if FEATURE_ARB_vertex_program
971 ctx
->Const
.MaxVertexProgramInstructions
= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS
;
972 ctx
->Const
.MaxVertexProgramAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
973 ctx
->Const
.MaxVertexProgramTemps
= MAX_NV_VERTEX_PROGRAM_TEMPS
;
974 ctx
->Const
.MaxVertexProgramLocalParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
975 ctx
->Const
.MaxVertexProgramEnvParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;/*XXX*/
976 ctx
->Const
.MaxVertexProgramAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
978 #if FEATURE_ARB_fragment_program
979 ctx
->Const
.MaxFragmentProgramInstructions
= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS
;
980 ctx
->Const
.MaxFragmentProgramAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
981 ctx
->Const
.MaxFragmentProgramTemps
= MAX_NV_FRAGMENT_PROGRAM_TEMPS
;
982 ctx
->Const
.MaxFragmentProgramLocalParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
983 ctx
->Const
.MaxFragmentProgramEnvParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;/*XXX*/
984 ctx
->Const
.MaxFragmentProgramAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
985 ctx
->Const
.MaxFragmentProgramAluInstructions
= MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS
;
986 ctx
->Const
.MaxFragmentProgramTexInstructions
= MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS
;
987 ctx
->Const
.MaxFragmentProgramTexIndirections
= MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS
;
990 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
991 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
993 /* If we're running in the X server, do bounds checking to prevent
994 * segfaults and server crashes!
996 #if defined(XFree86LOADER) && defined(IN_MODULE)
997 ctx
->Const
.CheckArrayBounds
= GL_TRUE
;
999 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
1002 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
1004 /* GL_OES_read_format */
1005 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
1006 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
1008 #if FEATURE_EXT_framebuffer_object
1009 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
1010 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
1014 ASSERT(ctx
->Const
.MaxTextureUnits
== MAX2(ctx
->Const
.MaxTextureImageUnits
, ctx
->Const
.MaxTextureCoordUnits
));
1019 * Initialize the attribute groups in a GL context.
1021 * \param ctx GL context.
1023 * Initializes all the attributes, calling the respective <tt>init*</tt>
1024 * functions for the more complex data structures.
1027 init_attrib_groups( GLcontext
*ctx
)
1032 _mesa_init_constants( ctx
);
1035 _mesa_init_extensions( ctx
);
1037 /* Attribute Groups */
1038 _mesa_init_accum( ctx
);
1039 _mesa_init_attrib( ctx
);
1040 _mesa_init_buffer_objects( ctx
);
1041 _mesa_init_color( ctx
);
1042 _mesa_init_colortables( ctx
);
1043 _mesa_init_current( ctx
);
1044 _mesa_init_depth( ctx
);
1045 _mesa_init_debug( ctx
);
1046 _mesa_init_display_list( ctx
);
1047 _mesa_init_eval( ctx
);
1048 _mesa_init_feedback( ctx
);
1049 _mesa_init_fog( ctx
);
1050 _mesa_init_histogram( ctx
);
1051 _mesa_init_hint( ctx
);
1052 _mesa_init_line( ctx
);
1053 _mesa_init_lighting( ctx
);
1054 _mesa_init_matrix( ctx
);
1055 _mesa_init_multisample( ctx
);
1056 _mesa_init_occlude( ctx
);
1057 _mesa_init_pixel( ctx
);
1058 _mesa_init_point( ctx
);
1059 _mesa_init_polygon( ctx
);
1060 _mesa_init_program( ctx
);
1061 _mesa_init_rastpos( ctx
);
1062 _mesa_init_scissor( ctx
);
1063 _mesa_init_shaderobjects (ctx
);
1064 _mesa_init_stencil( ctx
);
1065 _mesa_init_transform( ctx
);
1066 _mesa_init_varray( ctx
);
1067 _mesa_init_viewport( ctx
);
1069 if (!_mesa_init_texture( ctx
))
1072 _mesa_init_texture_s3tc( ctx
);
1073 _mesa_init_texture_fxt1( ctx
);
1076 ctx
->NewState
= _NEW_ALL
;
1077 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
1079 #if CHAN_TYPE == GL_FLOAT
1080 ctx
->ClampFragmentColors
= GL_FALSE
; /* XXX temporary */
1082 ctx
->ClampFragmentColors
= GL_TRUE
;
1084 ctx
->ClampVertexColors
= GL_TRUE
;
1091 * If the DRI libGL.so library is old, it may not have the entrypoints for
1092 * some recent OpenGL extensions. Dynamically add them now.
1093 * If we're building stand-alone Mesa where libGL.so has both the dispatcher
1094 * and driver code, this won't be an issue (and calling this function won't
1098 add_newer_entrypoints(void)
1101 static const struct {
1102 const char * const name
;
1105 newer_entrypoints
[] = {
1106 /* GL_ARB_window_pos aliases with GL_MESA_window_pos */
1107 { "glWindowPos2dARB", 513 },
1108 { "glWindowPos2dvARB", 514 },
1109 { "glWindowPos2fARB", 515 },
1110 { "glWindowPos2fvARB", 516 },
1111 { "glWindowPos2iARB", 517 },
1112 { "glWindowPos2ivARB", 518 },
1113 { "glWindowPos2sARB", 519 },
1114 { "glWindowPos2svARB", 520 },
1115 { "glWindowPos3dARB", 521 },
1116 { "glWindowPos3dvARB", 522 },
1117 { "glWindowPos3fARB", 523 },
1118 { "glWindowPos3fvARB", 524 },
1119 { "glWindowPos3iARB", 525 },
1120 { "glWindowPos3ivARB", 526 },
1121 { "glWindowPos3sARB", 527 },
1122 { "glWindowPos3svARB", 528 },
1123 #if FEATURE_NV_vertex_program
1124 { "glAreProgramsResidentNV", 578 },
1125 { "glBindProgramNV", 579 },
1126 { "glDeleteProgramsNV", 580 },
1127 { "glExecuteProgramNV", 581 },
1128 { "glGenProgramsNV", 582 },
1129 { "glGetProgramParameterdvNV", 583 },
1130 { "glGetProgramParameterfvNV", 584 },
1131 { "glGetProgramivNV", 585 },
1132 { "glGetProgramStringNV", 586 },
1133 { "glGetTrackMatrixivNV", 587 },
1134 { "glGetVertexAttribdvNV", 588 },
1135 { "glGetVertexAttribfvNV", 589 },
1136 { "glGetVertexAttribivNV", 590 },
1137 { "glGetVertexAttribPointervNV", 591 },
1138 { "glIsProgramNV", 592 },
1139 { "glLoadProgramNV", 593 },
1140 { "glProgramParameter4dNV", 594 },
1141 { "glProgramParameter4dvNV", 595 },
1142 { "glProgramParameter4fNV", 596 },
1143 { "glProgramParameter4fvNV", 597 },
1144 { "glProgramParameters4dvNV", 598 },
1145 { "glProgramParameters4fvNV", 599 },
1146 { "glRequestResidentProgramsNV", 600 },
1147 { "glTrackMatrixNV", 601 },
1148 { "glVertexAttribPointerNV", 602 },
1149 { "glVertexAttrib1dNV", 603 },
1150 { "glVertexAttrib1dvNV", 604 },
1151 { "glVertexAttrib1fNV", 605 },
1152 { "glVertexAttrib1fvNV", 606 },
1153 { "glVertexAttrib1sNV", 607 },
1154 { "glVertexAttrib1svNV", 608 },
1155 { "glVertexAttrib2dNV", 609 },
1156 { "glVertexAttrib2dvNV", 610 },
1157 { "glVertexAttrib2fNV", 611 },
1158 { "glVertexAttrib2fvNV", 612 },
1159 { "glVertexAttrib2sNV", 613 },
1160 { "glVertexAttrib2svNV", 614 },
1161 { "glVertexAttrib3dNV", 615 },
1162 { "glVertexAttrib3dvNV", 616 },
1163 { "glVertexAttrib3fNV", 617 },
1164 { "glVertexAttrib3fvNV", 618 },
1165 { "glVertexAttrib3sNV", 619 },
1166 { "glVertexAttrib3svNV", 620 },
1167 { "glVertexAttrib4dNV", 621 },
1168 { "glVertexAttrib4dvNV", 622 },
1169 { "glVertexAttrib4fNV", 623 },
1170 { "glVertexAttrib4fvNV", 624 },
1171 { "glVertexAttrib4sNV", 625 },
1172 { "glVertexAttrib4svNV", 626 },
1173 { "glVertexAttrib4ubNV", 627 },
1174 { "glVertexAttrib4ubvNV", 628 },
1175 { "glVertexAttribs1dvNV", 629 },
1176 { "glVertexAttribs1fvNV", 630 },
1177 { "glVertexAttribs1svNV", 631 },
1178 { "glVertexAttribs2dvNV", 632 },
1179 { "glVertexAttribs2fvNV", 633 },
1180 { "glVertexAttribs2svNV", 634 },
1181 { "glVertexAttribs3dvNV", 635 },
1182 { "glVertexAttribs3fvNV", 636 },
1183 { "glVertexAttribs3svNV", 637 },
1184 { "glVertexAttribs4dvNV", 638 },
1185 { "glVertexAttribs4fvNV", 639 },
1186 { "glVertexAttribs4svNV", 640 },
1187 { "glVertexAttribs4ubvNV", 641 },
1189 { "glPointParameteriNV", 642 },
1190 { "glPointParameterivNV", 643 },
1191 { "glMultiDrawArraysEXT", 644 },
1192 { "glMultiDrawElementsEXT", 645 },
1193 { "glMultiDrawArraysSUN", _gloffset_MultiDrawArraysEXT
},
1194 { "glMultiDrawElementsSUN", _gloffset_MultiDrawElementsEXT
},
1195 { "glActiveStencilFaceEXT", 646 },
1196 #if FEATURE_NV_fence
1197 { "glDeleteFencesNV", 647 },
1198 { "glGenFencesNV", 648 },
1199 { "glIsFenceNV", 649 },
1200 { "glTestFenceNV", 650 },
1201 { "glGetFenceivNV", 651 },
1202 { "glFinishFenceNV", 652 },
1203 { "glSetFenceNV", 653 },
1205 #if FEATURE_NV_fragment_program
1206 { "glProgramNamedParameter4fNV", 682 },
1207 { "glProgramNamedParameter4dNV", 683 },
1208 { "glProgramNamedParameter4fvNV", 683 },
1209 { "glProgramNamedParameter4dvNV", 684 },
1210 { "glGetProgramNamedParameterfvNV", 685 },
1211 { "glGetProgramNamedParameterdvNV", 686 },
1213 #if FEATURE_ARB_vertex_program
1214 { "glVertexAttrib1sARB", _gloffset_VertexAttrib1sNV
},
1215 { "glVertexAttrib1fARB", _gloffset_VertexAttrib1fNV
},
1216 { "glVertexAttrib1dARB", _gloffset_VertexAttrib1dNV
},
1217 { "glVertexAttrib2sARB", _gloffset_VertexAttrib2sNV
},
1218 { "glVertexAttrib2fARB", _gloffset_VertexAttrib2fNV
},
1219 { "glVertexAttrib2dARB", _gloffset_VertexAttrib2dNV
},
1220 { "glVertexAttrib3sARB", _gloffset_VertexAttrib3sNV
},
1221 { "glVertexAttrib3fARB", _gloffset_VertexAttrib3fNV
},
1222 { "glVertexAttrib3dARB", _gloffset_VertexAttrib3dNV
},
1223 { "glVertexAttrib4sARB", _gloffset_VertexAttrib4sNV
},
1224 { "glVertexAttrib4fARB", _gloffset_VertexAttrib4fNV
},
1225 { "glVertexAttrib4dARB", _gloffset_VertexAttrib4dNV
},
1226 { "glVertexAttrib4NubARB", _gloffset_VertexAttrib4ubNV
},
1227 { "glVertexAttrib1svARB", _gloffset_VertexAttrib1svNV
},
1228 { "glVertexAttrib1fvARB", _gloffset_VertexAttrib1fvNV
},
1229 { "glVertexAttrib1dvARB", _gloffset_VertexAttrib1dvNV
},
1230 { "glVertexAttrib2svARB", _gloffset_VertexAttrib2svNV
},
1231 { "glVertexAttrib2fvARB", _gloffset_VertexAttrib2fvNV
},
1232 { "glVertexAttrib2dvARB", _gloffset_VertexAttrib2dvNV
},
1233 { "glVertexAttrib3svARB", _gloffset_VertexAttrib3svNV
},
1234 { "glVertexAttrib3fvARB", _gloffset_VertexAttrib3fvNV
},
1235 { "glVertexAttrib3dvARB", _gloffset_VertexAttrib3dvNV
},
1236 { "glVertexAttrib4bvARB", _gloffset_VertexAttrib4bvARB
},
1237 { "glVertexAttrib4svARB", _gloffset_VertexAttrib4svNV
},
1238 { "glVertexAttrib4ivARB", _gloffset_VertexAttrib4ivARB
},
1239 { "glVertexAttrib4ubvARB", _gloffset_VertexAttrib4ubvARB
},
1240 { "glVertexAttrib4usvARB", _gloffset_VertexAttrib4usvARB
},
1241 { "glVertexAttrib4uivARB", _gloffset_VertexAttrib4uivARB
},
1242 { "glVertexAttrib4fvARB", _gloffset_VertexAttrib4fvNV
},
1243 { "glVertexAttrib4dvARB", _gloffset_VertexAttrib4dvNV
},
1244 { "glVertexAttrib4NbvARB", _gloffset_VertexAttrib4NbvARB
},
1245 { "glVertexAttrib4NsvARB", _gloffset_VertexAttrib4NsvARB
},
1246 { "glVertexAttrib4NivARB", _gloffset_VertexAttrib4NivARB
},
1247 { "glVertexAttrib4NubvARB", _gloffset_VertexAttrib4ubvNV
},
1248 { "glVertexAttrib4NusvARB", _gloffset_VertexAttrib4NusvARB
},
1249 { "glVertexAttrib4NuivARB", _gloffset_VertexAttrib4NuivARB
},
1250 { "glVertexAttribPointerARB", _gloffset_VertexAttribPointerARB
},
1251 { "glEnableVertexAttribArrayARB", _gloffset_EnableVertexAttribArrayARB
},
1252 { "glDisableVertexAttribArrayARB", _gloffset_DisableVertexAttribArrayARB
},
1253 { "glProgramStringARB", _gloffset_ProgramStringARB
},
1254 { "glBindProgramARB", _gloffset_BindProgramNV
},
1255 { "glDeleteProgramsARB", _gloffset_DeleteProgramsNV
},
1256 { "glGenProgramsARB", _gloffset_GenProgramsNV
},
1257 { "glIsProgramARB", _gloffset_IsProgramNV
},
1258 { "glProgramEnvParameter4dARB", _gloffset_ProgramEnvParameter4dARB
},
1259 { "glProgramEnvParameter4dvARB", _gloffset_ProgramEnvParameter4dvARB
},
1260 { "glProgramEnvParameter4fARB", _gloffset_ProgramEnvParameter4fARB
},
1261 { "glProgramEnvParameter4fvARB", _gloffset_ProgramEnvParameter4fvARB
},
1262 { "glProgramLocalParameter4dARB", _gloffset_ProgramLocalParameter4dARB
},
1263 { "glProgramLocalParameter4dvARB", _gloffset_ProgramLocalParameter4dvARB
},
1264 { "glProgramLocalParameter4fARB", _gloffset_ProgramLocalParameter4fARB
},
1265 { "glProgramLocalParameter4fvARB", _gloffset_ProgramLocalParameter4fvARB
},
1266 { "glGetProgramEnvParameterdvARB", _gloffset_GetProgramEnvParameterdvARB
},
1267 { "glGetProgramEnvParameterfvARB", _gloffset_GetProgramEnvParameterfvARB
},
1268 { "glGetProgramLocalParameterdvARB", _gloffset_GetProgramLocalParameterdvARB
},
1269 { "glGetProgramLocalParameterfvARB", _gloffset_GetProgramLocalParameterfvARB
},
1270 { "glGetProgramivARB", _gloffset_GetProgramivARB
},
1271 { "glGetProgramStringARB", _gloffset_GetProgramStringARB
},
1272 { "glGetVertexAttribdvARB", _gloffset_GetVertexAttribdvNV
},
1273 { "glGetVertexAttribfvARB", _gloffset_GetVertexAttribfvNV
},
1274 { "glGetVertexAttribivARB", _gloffset_GetVertexAttribivNV
},
1275 { "glGetVertexAttribPointervARB", _gloffset_GetVertexAttribPointervNV
},
1277 { "glMultiModeDrawArraysIBM", _gloffset_MultiModeDrawArraysIBM
},
1278 { "glMultiModeDrawElementsIBM", _gloffset_MultiModeDrawElementsIBM
},
1279 /* GL_EXT_stencil_two_side */
1280 { "glActiveStencilFaceEXT", _gloffset_ActiveStencilFaceEXT
},
1281 /* GL_ARB_draw_buffers */
1282 { "glDrawBuffersARB", _gloffset_DrawBuffersARB
},
1283 #if FEATURE_ATI_fragment_shader
1284 { "glGenFragmentShadersATI", _gloffset_GenFragmentShadersATI
},
1285 { "glBindFragmentShaderATI", _gloffset_BindFragmentShaderATI
},
1286 { "glDeleteFragmentShaderATI", _gloffset_DeleteFragmentShaderATI
},
1287 { "glBeginFragmentShaderATI", _gloffset_BeginFragmentShaderATI
},
1288 { "glEndFragmentShaderATI", _gloffset_EndFragmentShaderATI
},
1289 { "glPassTexCoordATI", _gloffset_PassTexCoordATI
},
1290 { "glSampleMapATI", _gloffset_SampleMapATI
},
1291 { "glColorFragmentOp1ATI", _gloffset_ColorFragmentOp1ATI
},
1292 { "glColorFragmentOp2ATI", _gloffset_ColorFragmentOp2ATI
},
1293 { "glColorFragmentOp3ATI", _gloffset_ColorFragmentOp3ATI
},
1294 { "glAlphaFragmentOp1ATI", _gloffset_AlphaFragmentOp1ATI
},
1295 { "glAlphaFragmentOp2ATI", _gloffset_AlphaFragmentOp2ATI
},
1296 { "glAlphaFragmentOp3ATI", _gloffset_AlphaFragmentOp3ATI
},
1297 { "glSetFragmentShaderConstantATI", _gloffset_SetFragmentShaderConstantATI
},
1301 for (i
= 0; i
< Elements(newer_entrypoints
); i
++ ) {
1302 _glapi_add_entrypoint( newer_entrypoints
[i
].name
,
1303 newer_entrypoints
[i
].offset
);
1309 * This is the default function we plug into all dispatch table slots
1310 * This helps prevents a segfault when someone calls a GL function without
1311 * first checking if the extension's supported.
1316 _mesa_problem(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
1322 * Allocate and initialize a new dispatch table.
1324 static struct _glapi_table
*
1325 alloc_dispatch_table(void)
1327 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1328 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1329 * Mesa we do this to accomodate different versions of libGL and various
1332 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
1333 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
1334 struct _glapi_table
*table
=
1335 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
1337 _glapi_proc
*entry
= (_glapi_proc
*) table
;
1339 for (i
= 0; i
< numEntries
; i
++) {
1340 entry
[i
] = (_glapi_proc
) generic_nop
;
1348 * Initialize a GLcontext struct (rendering context).
1350 * This includes allocating all the other structs and arrays which hang off of
1351 * the context by pointers.
1352 * Note that the driver needs to pass in its dd_function_table here since
1353 * we need to at least call driverFunctions->NewTextureObject to create the
1354 * default texture objects.
1356 * Called by _mesa_create_context().
1358 * Performs the imports and exports callback tables initialization, and
1359 * miscellaneous one-time initializations. If no shared context is supplied one
1360 * is allocated, and increase its reference count. Setups the GL API dispatch
1361 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1362 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1365 * \param ctx the context to initialize
1366 * \param visual describes the visual attributes for this context
1367 * \param share_list points to context to share textures, display lists,
1369 * \param driverFunctions table of device driver functions for this context
1371 * \param driverContext pointer to driver-specific context data
1374 _mesa_initialize_context( GLcontext
*ctx
,
1375 const GLvisual
*visual
,
1376 GLcontext
*share_list
,
1377 const struct dd_function_table
*driverFunctions
,
1378 void *driverContext
)
1380 ASSERT(driverContext
);
1381 assert(driverFunctions
->NewTextureObject
);
1382 assert(driverFunctions
->FreeTexImageData
);
1384 /* If the driver wants core Mesa to use special imports, it'll have to
1385 * override these defaults.
1387 _mesa_init_default_imports( &(ctx
->imports
), driverContext
);
1389 /* initialize the exports (Mesa functions called by the window system) */
1390 _mesa_init_default_exports( &(ctx
->exports
) );
1392 /* misc one-time initializations */
1395 ctx
->Visual
= *visual
;
1396 ctx
->DrawBuffer
= NULL
;
1397 ctx
->ReadBuffer
= NULL
;
1398 ctx
->WinSysDrawBuffer
= NULL
;
1399 ctx
->WinSysReadBuffer
= NULL
;
1401 /* Plug in driver functions and context pointer here.
1402 * This is important because when we call alloc_shared_state() below
1403 * we'll call ctx->Driver.NewTextureObject() to create the default
1406 ctx
->Driver
= *driverFunctions
;
1407 ctx
->DriverCtx
= driverContext
;
1410 /* share state with another context */
1411 ctx
->Shared
= share_list
->Shared
;
1414 /* allocate new, unshared state */
1415 if (!alloc_shared_state( ctx
)) {
1419 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1420 ctx
->Shared
->RefCount
++;
1421 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1423 if (!init_attrib_groups( ctx
)) {
1424 free_shared_state(ctx
, ctx
->Shared
);
1428 /* libGL ABI coordination */
1429 add_newer_entrypoints();
1431 /* setup the API dispatch tables */
1432 ctx
->Exec
= alloc_dispatch_table();
1433 ctx
->Save
= alloc_dispatch_table();
1434 if (!ctx
->Exec
|| !ctx
->Save
) {
1435 free_shared_state(ctx
, ctx
->Shared
);
1437 _mesa_free(ctx
->Exec
);
1439 _mesa_init_exec_table(ctx
->Exec
);
1440 ctx
->CurrentDispatch
= ctx
->Exec
;
1442 _mesa_init_dlist_table(ctx
->Save
);
1443 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
1444 /* Neutral tnl module stuff */
1445 _mesa_init_exec_vtxfmt( ctx
);
1446 ctx
->TnlModule
.Current
= NULL
;
1447 ctx
->TnlModule
.SwapCount
= 0;
1450 ctx
->_MaintainTexEnvProgram
= (_mesa_getenv("MESA_TEX_PROG") != NULL
);
1451 ctx
->_MaintainTnlProgram
= (_mesa_getenv("MESA_TNL_PROG") != NULL
);
1458 * Allocate and initialize a GLcontext structure.
1459 * Note that the driver needs to pass in its dd_function_table here since
1460 * we need to at least call driverFunctions->NewTextureObject to initialize
1461 * the rendering context.
1463 * \param visual a GLvisual pointer (we copy the struct contents)
1464 * \param share_list another context to share display lists with or NULL
1465 * \param driverFunctions points to the dd_function_table into which the
1466 * driver has plugged in all its special functions.
1467 * \param driverCtx points to the device driver's private context state
1469 * \return pointer to a new __GLcontextRec or NULL if error.
1472 _mesa_create_context( const GLvisual
*visual
,
1473 GLcontext
*share_list
,
1474 const struct dd_function_table
*driverFunctions
,
1475 void *driverContext
)
1481 ASSERT(driverContext
);
1483 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
1487 if (_mesa_initialize_context(ctx
, visual
, share_list
,
1488 driverFunctions
, driverContext
)) {
1499 * Free the data associated with the given context.
1501 * But doesn't free the GLcontext struct itself.
1503 * \sa _mesa_initialize_context() and init_attrib_groups().
1506 _mesa_free_context_data( GLcontext
*ctx
)
1508 /* if we're destroying the current context, unbind it first */
1509 if (ctx
== _mesa_get_current_context()) {
1510 _mesa_make_current(NULL
, NULL
, NULL
);
1513 _mesa_free_lighting_data( ctx
);
1514 _mesa_free_eval_data( ctx
);
1515 _mesa_free_texture_data( ctx
);
1516 _mesa_free_matrix_data( ctx
);
1517 _mesa_free_viewport_data( ctx
);
1518 _mesa_free_colortables_data( ctx
);
1519 _mesa_free_program_data(ctx
);
1520 _mesa_free_occlude_data(ctx
);
1522 #if FEATURE_ARB_vertex_buffer_object
1523 _mesa_delete_buffer_object(ctx
, ctx
->Array
.NullBufferObj
);
1526 /* free dispatch tables */
1527 _mesa_free(ctx
->Exec
);
1528 _mesa_free(ctx
->Save
);
1530 /* Shared context state (display lists, textures, etc) */
1531 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1532 ctx
->Shared
->RefCount
--;
1533 assert(ctx
->Shared
->RefCount
>= 0);
1534 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1535 if (ctx
->Shared
->RefCount
== 0) {
1536 /* free shared state */
1537 free_shared_state( ctx
, ctx
->Shared
);
1540 if (ctx
->Extensions
.String
)
1541 FREE((void *) ctx
->Extensions
.String
);
1546 * Destroy a GLcontext structure.
1548 * \param ctx GL context.
1550 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1553 _mesa_destroy_context( GLcontext
*ctx
)
1556 _mesa_free_context_data(ctx
);
1557 FREE( (void *) ctx
);
1564 * Copy attribute groups from one context to another.
1566 * \param src source context
1567 * \param dst destination context
1568 * \param mask bitwise OR of GL_*_BIT flags
1570 * According to the bits specified in \p mask, copies the corresponding
1571 * attributes from \p src into \p dst. For many of the attributes a simple \c
1572 * memcpy is not enough due to the existence of internal pointers in their data
1576 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1578 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1580 dst
->Accum
= src
->Accum
;
1582 if (mask
& GL_COLOR_BUFFER_BIT
) {
1584 dst
->Color
= src
->Color
;
1586 if (mask
& GL_CURRENT_BIT
) {
1588 dst
->Current
= src
->Current
;
1590 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1592 dst
->Depth
= src
->Depth
;
1594 if (mask
& GL_ENABLE_BIT
) {
1597 if (mask
& GL_EVAL_BIT
) {
1599 dst
->Eval
= src
->Eval
;
1601 if (mask
& GL_FOG_BIT
) {
1603 dst
->Fog
= src
->Fog
;
1605 if (mask
& GL_HINT_BIT
) {
1607 dst
->Hint
= src
->Hint
;
1609 if (mask
& GL_LIGHTING_BIT
) {
1611 /* begin with memcpy */
1612 MEMCPY( &dst
->Light
, &src
->Light
, sizeof(struct gl_light
) );
1613 /* fixup linked lists to prevent pointer insanity */
1614 make_empty_list( &(dst
->Light
.EnabledList
) );
1615 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1616 if (dst
->Light
.Light
[i
].Enabled
) {
1617 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1621 if (mask
& GL_LINE_BIT
) {
1623 dst
->Line
= src
->Line
;
1625 if (mask
& GL_LIST_BIT
) {
1627 dst
->List
= src
->List
;
1629 if (mask
& GL_PIXEL_MODE_BIT
) {
1631 dst
->Pixel
= src
->Pixel
;
1633 if (mask
& GL_POINT_BIT
) {
1635 dst
->Point
= src
->Point
;
1637 if (mask
& GL_POLYGON_BIT
) {
1639 dst
->Polygon
= src
->Polygon
;
1641 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1642 /* Use loop instead of MEMCPY due to problem with Portland Group's
1643 * C compiler. Reported by John Stone.
1646 for (i
= 0; i
< 32; i
++) {
1647 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1650 if (mask
& GL_SCISSOR_BIT
) {
1652 dst
->Scissor
= src
->Scissor
;
1654 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1656 dst
->Stencil
= src
->Stencil
;
1658 if (mask
& GL_TEXTURE_BIT
) {
1659 /* Cannot memcpy because of pointers */
1660 _mesa_copy_texture_state(src
, dst
);
1662 if (mask
& GL_TRANSFORM_BIT
) {
1664 dst
->Transform
= src
->Transform
;
1666 if (mask
& GL_VIEWPORT_BIT
) {
1667 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1668 dst
->Viewport
.X
= src
->Viewport
.X
;
1669 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1670 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1671 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1672 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1673 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1674 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1677 /* XXX FIXME: Call callbacks?
1679 dst
->NewState
= _NEW_ALL
;
1685 * Check if the given context can render into the given framebuffer
1686 * by checking visual attributes.
1687 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1690 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1692 const GLvisual
*ctxvis
= &ctx
->Visual
;
1693 const GLvisual
*bufvis
= &buffer
->Visual
;
1695 if (ctxvis
== bufvis
)
1698 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1700 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1702 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1704 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1706 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1708 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1710 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1712 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1714 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1716 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1718 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1726 * Bind the given context to the given draw-buffer and read-buffer and
1727 * make it the current context for this thread.
1729 * \param newCtx new GL context. If NULL then there will be no current GL
1731 * \param drawBuffer draw framebuffer.
1732 * \param readBuffer read framebuffer.
1734 * Check that the context's and framebuffer's visuals are compatible, returning
1735 * immediately otherwise. Sets the glapi current context via
1736 * _glapi_set_context(). If \p newCtx is not NULL, associates \p drawBuffer and
1737 * \p readBuffer with it and calls dd_function_table::ResizeBuffers if the buffers size has changed.
1738 * Calls dd_function_table::MakeCurrent callback if defined.
1740 * When a context is bound by the first time and the \c MESA_INFO environment
1741 * variable is set it calls print_info() as an aid for remote user
1745 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1746 GLframebuffer
*readBuffer
)
1748 if (MESA_VERBOSE
& VERBOSE_API
)
1749 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1751 /* Check that the context's and framebuffer's visuals are compatible.
1753 if (newCtx
&& drawBuffer
&& newCtx
->DrawBuffer
!= drawBuffer
) {
1754 if (!check_compatible(newCtx
, drawBuffer
))
1757 if (newCtx
&& readBuffer
&& newCtx
->ReadBuffer
!= readBuffer
) {
1758 if (!check_compatible(newCtx
, readBuffer
))
1762 /* We call this function periodically (just here for now) in
1763 * order to detect when multithreading has begun.
1765 _glapi_check_multithread();
1767 _glapi_set_context((void *) newCtx
);
1768 ASSERT(_mesa_get_current_context() == newCtx
);
1771 _glapi_set_dispatch(NULL
); /* none current */
1774 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1776 if (drawBuffer
&& readBuffer
) {
1777 /* TODO: check if newCtx and buffer's visual match??? */
1779 #if NEW_RENDERBUFFER
1780 ASSERT(drawBuffer
->Name
== 0);
1781 ASSERT(readBuffer
->Name
== 0);
1782 newCtx
->WinSysDrawBuffer
= drawBuffer
;
1783 newCtx
->WinSysReadBuffer
= readBuffer
;
1784 /* don't replace user-buffer bindings with window system buffer */
1785 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1786 newCtx
->DrawBuffer
= drawBuffer
;
1787 newCtx
->ReadBuffer
= readBuffer
;
1790 newCtx
->DrawBuffer
= drawBuffer
;
1791 newCtx
->ReadBuffer
= readBuffer
;
1793 newCtx
->NewState
|= _NEW_BUFFERS
;
1796 if (!drawBuffer
->Initialized
) {
1797 /* get initial window size */
1798 GLuint bufWidth
, bufHeight
;
1799 /* ask device driver for size of the buffer */
1800 (*newCtx
->Driver
.GetBufferSize
)(drawBuffer
, &bufWidth
, &bufHeight
);
1801 /* set initial buffer size */
1802 if (newCtx
->Driver
.ResizeBuffers
)
1803 newCtx
->Driver
.ResizeBuffers(newCtx
, drawBuffer
,
1804 bufWidth
, bufHeight
);
1805 drawBuffer
->Initialized
= GL_TRUE
;
1808 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1809 /* get initial window size */
1810 GLuint bufWidth
, bufHeight
;
1811 /* ask device driver for size of the buffer */
1812 (*newCtx
->Driver
.GetBufferSize
)(readBuffer
, &bufWidth
, &bufHeight
);
1813 /* set initial buffer size */
1814 if (newCtx
->Driver
.ResizeBuffers
)
1815 newCtx
->Driver
.ResizeBuffers(newCtx
, readBuffer
,
1816 bufWidth
, bufHeight
);
1817 readBuffer
->Initialized
= GL_TRUE
;
1820 if (newCtx
->FirstTimeCurrent
) {
1821 /* set initial viewport and scissor size now */
1822 _mesa_set_viewport(newCtx
, 0, 0, drawBuffer
->Width
, drawBuffer
->Height
);
1823 newCtx
->Scissor
.Width
= drawBuffer
->Width
;
1824 newCtx
->Scissor
.Height
= drawBuffer
->Height
;
1828 /* Alert the driver - usually passed on to the sw t&l module,
1829 * but also used to detect threaded cases in the radeon codegen
1832 if (newCtx
->Driver
.MakeCurrent
)
1833 newCtx
->Driver
.MakeCurrent( newCtx
, drawBuffer
, readBuffer
);
1835 /* We can use this to help debug user's problems. Tell them to set
1836 * the MESA_INFO env variable before running their app. Then the
1837 * first time each context is made current we'll print some useful
1840 if (newCtx
->FirstTimeCurrent
) {
1841 if (_mesa_getenv("MESA_INFO")) {
1844 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1851 * Make context 'ctx' share the display lists, textures and programs
1852 * that are associated with 'ctxToShare'.
1853 * Any display lists, textures or programs associated with 'ctx' will
1854 * be deleted if nobody else is sharing them.
1857 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1859 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1860 ctx
->Shared
->RefCount
--;
1861 if (ctx
->Shared
->RefCount
== 0) {
1862 free_shared_state(ctx
, ctx
->Shared
);
1864 ctx
->Shared
= ctxToShare
->Shared
;
1865 ctx
->Shared
->RefCount
++;
1876 * Get current context for the calling thread.
1878 * \return pointer to the current GL context.
1880 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1881 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in context.h.
1884 _mesa_get_current_context( void )
1886 return (GLcontext
*) _glapi_get_context();
1890 * Get context's current API dispatch table.
1892 * It'll either be the immediate-mode execute dispatcher or the display list
1893 * compile dispatcher.
1895 * \param ctx GL context.
1897 * \return pointer to dispatch_table.
1899 * Simply returns __GLcontextRec::CurrentDispatch.
1901 struct _glapi_table
*
1902 _mesa_get_dispatch(GLcontext
*ctx
)
1904 return ctx
->CurrentDispatch
;
1910 /**********************************************************************/
1911 /** \name Miscellaneous functions */
1912 /**********************************************************************/
1918 * \param ctx GL context.
1919 * \param error error code.
1921 * Records the given error code and call the driver's dd_function_table::Error
1922 * function if defined.
1925 * This is called via _mesa_error().
1928 _mesa_record_error( GLcontext
*ctx
, GLenum error
)
1933 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1934 ctx
->ErrorValue
= error
;
1937 /* Call device driver's error handler, if any. This is used on the Mac. */
1938 if (ctx
->Driver
.Error
) {
1939 (*ctx
->Driver
.Error
)( ctx
);
1944 * Execute glFinish().
1946 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1947 * dd_function_table::Finish driver callback, if not NULL.
1950 _mesa_Finish( void )
1952 GET_CURRENT_CONTEXT(ctx
);
1953 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1954 if (ctx
->Driver
.Finish
) {
1955 (*ctx
->Driver
.Finish
)( ctx
);
1960 * Execute glFlush().
1962 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1963 * dd_function_table::Flush driver callback, if not NULL.
1968 GET_CURRENT_CONTEXT(ctx
);
1969 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1970 if (ctx
->Driver
.Flush
) {
1971 (*ctx
->Driver
.Flush
)( ctx
);