3 * Mesa context/visual/framebuffer management functions.
8 * Mesa 3-D graphics library
11 * Copyright (C) 1999-2004 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 Core Module
35 * \section CoreIntroduction Introduction
37 * The Mesa core module consists of all the top-level files in the src
38 * directory. The core module basically takes care of API dispatch,
39 * and OpenGL state management.
41 * For example, calls to glPolygonMode() are routed to _mesa_PolygonMode()
42 * which updates the state related to polygonmode. Furthermore, dirty
43 * state flags related to polygon mode are set and if the device driver
44 * implements a special routine for PolygonMode, it will be called.
47 * \section AboutDoxygen About Doxygen
49 * If you're viewing this information as Doxygen-generated HTML you'll
50 * see the documentation index at the top of this page.
52 * The first line lists the Mesa source code modules.
53 * The second line lists the indexes available for viewing the documentation
56 * Selecting the <b>Main page</b> link will display a summary of the module
59 * Selecting <b>Data Structures</b> will list all C structures.
61 * Selecting the <b>File List</b> link will list all the source files in
63 * Selecting a filename will show a list of all functions defined in that file.
65 * Selecting the <b>Data Fields</b> link will display a list of all
66 * documented structure members.
68 * Selecting the <b>Globals</b> link will display a list
69 * of all functions, structures, global variables and macros in the module.
80 #include "bufferobj.h"
88 #include "extensions.h"
93 #include "glapioffsets.h"
94 #include "histogram.h"
105 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
109 #include "simple_list.h"
112 #include "teximage.h"
114 #include "texstate.h"
119 #include "math/m_translate.h"
120 #include "math/m_matrix.h"
121 #include "math/m_xform.h"
122 #include "math/mathmod.h"
126 #include "SPARC/sparc.h"
130 int MESA_VERBOSE
= 0;
133 #ifndef MESA_DEBUG_FLAGS
134 int MESA_DEBUG_FLAGS
= 0;
138 /* ubyte -> float conversion */
139 GLfloat _mesa_ubyte_to_float_color_tab
[256];
142 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
);
145 /**********************************************************************/
146 /** \name OpenGL SI-style interface (new in Mesa 3.5)
149 * \note Most of these functions are never called in the Mesa subset.
155 * Destroy context callback.
158 * \return GL_TRUE on success, or GL_FALSE on failure.
161 * Called by window system/device driver (via __GLexports::destroyCurrent) when
162 * the rendering context is to be destroyed.
165 * Frees the context data and the context structure.
168 _mesa_destroyContext(__GLcontext
*gc
)
171 _mesa_free_context_data(gc
);
178 * Unbind context callback.
181 * \return GL_TRUE on success, or GL_FALSE on failure.
184 * Called by window system/device driver (via __GLexports::loseCurrent)
185 * when the rendering context is made non-current.
191 _mesa_loseCurrent(__GLcontext
*gc
)
193 /* XXX unbind context from thread */
198 * Bind context callback.
201 * \return GL_TRUE on success, or GL_FALSE on failure.
204 * Called by window system/device driver (via __GLexports::makeCurrent)
205 * when the rendering context is made current.
211 _mesa_makeCurrent(__GLcontext
*gc
)
213 /* XXX bind context to thread */
218 * Share context callback.
221 * \param gcShare shared context.
222 * \return GL_TRUE on success, or GL_FALSE on failure.
225 * Called by window system/device driver (via __GLexports::shareContext)
228 * Update the shared context reference count, gl_shared_state::RefCount.
231 _mesa_shareContext(__GLcontext
*gc
, __GLcontext
*gcShare
)
233 if (gc
&& gcShare
&& gc
->Shared
&& gcShare
->Shared
) {
234 gc
->Shared
->RefCount
--;
235 if (gc
->Shared
->RefCount
== 0) {
236 free_shared_state(gc
, gc
->Shared
);
238 gc
->Shared
= gcShare
->Shared
;
239 gc
->Shared
->RefCount
++;
250 * Copy context callback.
253 _mesa_copyContext(__GLcontext
*dst
, const __GLcontext
*src
, GLuint mask
)
256 _mesa_copy_context( src
, dst
, mask
);
267 _mesa_forceCurrent(__GLcontext
*gc
)
273 * Windows/buffer resizing notification callback.
275 * \param gc GL context.
276 * \return GL_TRUE on success, or GL_FALSE on failure.
279 _mesa_notifyResize(__GLcontext
*gc
)
282 GLuint width
, height
;
283 __GLdrawablePrivate
*d
= gc
->imports
.getDrawablePrivate(gc
);
284 if (!d
|| !d
->getDrawableSize
)
286 d
->getDrawableSize( d
, &x
, &y
, &width
, &height
);
287 /* update viewport, resize software buffers, etc. */
292 * Window/buffer destruction notification callback.
294 * \param gc GL context.
296 * Called when the context's window/buffer is going to be destroyed.
301 _mesa_notifyDestroy(__GLcontext
*gc
)
303 /* Unbind from it. */
307 * Swap buffers notification callback.
309 * \param gc GL context.
311 * Called by window system just before swapping buffers.
312 * We have to finish any pending rendering.
315 _mesa_notifySwapBuffers(__GLcontext
*gc
)
317 FLUSH_VERTICES( gc
, 0 );
321 struct __GLdispatchStateRec
*
322 _mesa_dispatchExec(__GLcontext
*gc
)
329 _mesa_beginDispatchOverride(__GLcontext
*gc
)
335 _mesa_endDispatchOverride(__GLcontext
*gc
)
343 * The window system will call these functions when it needs Mesa to do
346 * \note Device drivers should override these functions! For example,
347 * the Xlib driver should plug in the XMesa*-style functions into this
348 * structure. The XMesa-style functions should then call the _mesa_*
349 * version of these functions. This is an approximation to OO design
350 * (inheritance and virtual functions).
359 _mesa_init_default_exports(__GLexports
*exports
)
362 exports
->destroyContext
= _mesa_destroyContext
;
363 exports
->loseCurrent
= _mesa_loseCurrent
;
364 exports
->makeCurrent
= _mesa_makeCurrent
;
365 exports
->shareContext
= _mesa_shareContext
;
366 exports
->copyContext
= _mesa_copyContext
;
367 exports
->forceCurrent
= _mesa_forceCurrent
;
368 exports
->notifyResize
= _mesa_notifyResize
;
369 exports
->notifyDestroy
= _mesa_notifyDestroy
;
370 exports
->notifySwapBuffers
= _mesa_notifySwapBuffers
;
371 exports
->dispatchExec
= _mesa_dispatchExec
;
372 exports
->beginDispatchOverride
= _mesa_beginDispatchOverride
;
373 exports
->endDispatchOverride
= _mesa_endDispatchOverride
;
378 * Exported OpenGL SI interface.
381 __glCoreCreateContext(__GLimports
*imports
, __GLcontextModes
*modes
)
385 ctx
= (GLcontext
*) (*imports
->calloc
)(NULL
, 1, sizeof(GLcontext
));
390 /* XXX doesn't work at this time */
391 _mesa_initialize_context(ctx
, modes
, NULL
, NULL
, NULL
);
392 ctx
->imports
= *imports
;
398 * Exported OpenGL SI interface.
401 __glCoreNopDispatch(void)
405 __gl_dispatch
= __glNopDispatchState
;
408 _glapi_set_dispatch(NULL
);
415 /**********************************************************************/
416 /** \name GL Visual allocation/destruction */
417 /**********************************************************************/
421 * Allocate a new GLvisual object.
423 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
424 * \param dbFlag double buffering
425 * \param stereoFlag stereo buffer
426 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
427 * is acceptable but the actual depth type will be GLushort or GLuint as
429 * \param stencilBits requested minimum bits per stencil buffer value
430 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
431 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
432 * \param redBits number of bits per color component in frame buffer for RGB(A)
433 * mode. We always use 8 in core Mesa though.
434 * \param greenBits same as above.
435 * \param blueBits same as above.
436 * \param alphaBits same as above.
437 * \param numSamples not really used.
439 * \return pointer to new GLvisual or NULL if requested parameters can't be
442 * Allocates a GLvisual structure and initializes it via
443 * _mesa_initialize_visual().
446 _mesa_create_visual( GLboolean rgbFlag
,
448 GLboolean stereoFlag
,
457 GLint accumGreenBits
,
459 GLint accumAlphaBits
,
462 GLvisual
*vis
= (GLvisual
*) CALLOC( sizeof(GLvisual
) );
464 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
465 redBits
, greenBits
, blueBits
, alphaBits
,
466 indexBits
, depthBits
, stencilBits
,
467 accumRedBits
, accumGreenBits
,
468 accumBlueBits
, accumAlphaBits
,
478 * Initialize the fields of the given GLvisual.
480 * \return GL_TRUE on success, or GL_FALSE on failure.
482 * \sa _mesa_create_visual() above for the parameter description.
484 * Makes some sanity checks and fills in the fields of the
485 * GLvisual structure with the given parameters.
488 _mesa_initialize_visual( GLvisual
*vis
,
491 GLboolean stereoFlag
,
500 GLint accumGreenBits
,
502 GLint accumAlphaBits
,
509 /* This is to catch bad values from device drivers not updated for
510 * Mesa 3.3. Some device drivers just passed 1. That's a REALLY
511 * bad value now (a 1-bit depth buffer!?!).
513 assert(depthBits
== 0 || depthBits
> 1);
515 if (depthBits
< 0 || depthBits
> 32) {
518 if (stencilBits
< 0 || stencilBits
> (GLint
) (8 * sizeof(GLstencil
))) {
521 if (accumRedBits
< 0 || accumRedBits
> (GLint
) (8 * sizeof(GLaccum
))) {
524 if (accumGreenBits
< 0 || accumGreenBits
> (GLint
) (8 * sizeof(GLaccum
))) {
527 if (accumBlueBits
< 0 || accumBlueBits
> (GLint
) (8 * sizeof(GLaccum
))) {
530 if (accumAlphaBits
< 0 || accumAlphaBits
> (GLint
) (8 * sizeof(GLaccum
))) {
534 vis
->rgbMode
= rgbFlag
;
535 vis
->doubleBufferMode
= dbFlag
;
536 vis
->stereoMode
= stereoFlag
;
538 vis
->redBits
= redBits
;
539 vis
->greenBits
= greenBits
;
540 vis
->blueBits
= blueBits
;
541 vis
->alphaBits
= alphaBits
;
543 vis
->indexBits
= indexBits
;
544 vis
->depthBits
= depthBits
;
545 vis
->accumRedBits
= (accumRedBits
> 0) ? (8 * sizeof(GLaccum
)) : 0;
546 vis
->accumGreenBits
= (accumGreenBits
> 0) ? (8 * sizeof(GLaccum
)) : 0;
547 vis
->accumBlueBits
= (accumBlueBits
> 0) ? (8 * sizeof(GLaccum
)) : 0;
548 vis
->accumAlphaBits
= (accumAlphaBits
> 0) ? (8 * sizeof(GLaccum
)) : 0;
549 vis
->stencilBits
= (stencilBits
> 0) ? (8 * sizeof(GLstencil
)) : 0;
551 vis
->haveAccumBuffer
= accumRedBits
> 0;
552 vis
->haveDepthBuffer
= depthBits
> 0;
553 vis
->haveStencilBuffer
= stencilBits
> 0;
555 vis
->numAuxBuffers
= 0;
567 * Frees the visual structure.
570 _mesa_destroy_visual( GLvisual
*vis
)
578 /**********************************************************************/
579 /** \name GL Framebuffer allocation/destruction */
580 /**********************************************************************/
584 * Create a new framebuffer.
586 * A GLframebuffer is a structure which encapsulates the depth, stencil and
587 * accum buffers and related parameters.
589 * \param visual a GLvisual pointer (we copy the struct contents)
590 * \param softwareDepth create/use a software depth buffer?
591 * \param softwareStencil create/use a software stencil buffer?
592 * \param softwareAccum create/use a software accum buffer?
593 * \param softwareAlpha create/use a software alpha buffer?
595 * \return pointer to new GLframebuffer struct or NULL if error.
597 * Allocate a GLframebuffer structure and initializes it via
598 * _mesa_initialize_framebuffer().
601 _mesa_create_framebuffer( const GLvisual
*visual
,
602 GLboolean softwareDepth
,
603 GLboolean softwareStencil
,
604 GLboolean softwareAccum
,
605 GLboolean softwareAlpha
)
607 GLframebuffer
*buffer
= CALLOC_STRUCT(gl_frame_buffer
);
610 _mesa_initialize_framebuffer(buffer
, visual
,
611 softwareDepth
, softwareStencil
,
612 softwareAccum
, softwareAlpha
);
618 * Initialize a GLframebuffer object.
620 * \sa _mesa_create_framebuffer() above for the parameter description.
622 * Makes some sanity checks and fills in the fields of the
623 * GLframebuffer structure with the given parameters.
626 _mesa_initialize_framebuffer( GLframebuffer
*buffer
,
627 const GLvisual
*visual
,
628 GLboolean softwareDepth
,
629 GLboolean softwareStencil
,
630 GLboolean softwareAccum
,
631 GLboolean softwareAlpha
)
636 _mesa_bzero(buffer
, sizeof(GLframebuffer
));
639 if (softwareDepth
) {
640 assert(visual
->depthBits
> 0);
642 if (softwareStencil
) {
643 assert(visual
->stencilBits
> 0);
646 assert(visual
->rgbMode
);
647 assert(visual
->accumRedBits
> 0);
648 assert(visual
->accumGreenBits
> 0);
649 assert(visual
->accumBlueBits
> 0);
652 assert(visual
->rgbMode
);
653 assert(visual
->alphaBits
> 0);
656 buffer
->Visual
= *visual
;
657 buffer
->UseSoftwareDepthBuffer
= softwareDepth
;
658 buffer
->UseSoftwareStencilBuffer
= softwareStencil
;
659 buffer
->UseSoftwareAccumBuffer
= softwareAccum
;
660 buffer
->UseSoftwareAlphaBuffers
= softwareAlpha
;
664 * Free a framebuffer struct and its buffers.
666 * Calls _mesa_free_framebuffer_data() and frees the structure.
669 _mesa_destroy_framebuffer( GLframebuffer
*buffer
)
672 _mesa_free_framebuffer_data(buffer
);
678 * Free the data hanging off of \p buffer, but not \p buffer itself.
680 * \param buffer framebuffer.
682 * Frees all the buffers associated with the structure.
685 _mesa_free_framebuffer_data( GLframebuffer
*buffer
)
690 if (buffer
->UseSoftwareDepthBuffer
&& buffer
->DepthBuffer
) {
691 MESA_PBUFFER_FREE( buffer
->DepthBuffer
);
692 buffer
->DepthBuffer
= NULL
;
694 if (buffer
->UseSoftwareAccumBuffer
&& buffer
->Accum
) {
695 MESA_PBUFFER_FREE( buffer
->Accum
);
696 buffer
->Accum
= NULL
;
698 if (buffer
->UseSoftwareStencilBuffer
&& buffer
->Stencil
) {
699 MESA_PBUFFER_FREE( buffer
->Stencil
);
700 buffer
->Stencil
= NULL
;
702 if (buffer
->UseSoftwareAlphaBuffers
){
703 if (buffer
->FrontLeftAlpha
) {
704 MESA_PBUFFER_FREE( buffer
->FrontLeftAlpha
);
705 buffer
->FrontLeftAlpha
= NULL
;
707 if (buffer
->BackLeftAlpha
) {
708 MESA_PBUFFER_FREE( buffer
->BackLeftAlpha
);
709 buffer
->BackLeftAlpha
= NULL
;
711 if (buffer
->FrontRightAlpha
) {
712 MESA_PBUFFER_FREE( buffer
->FrontRightAlpha
);
713 buffer
->FrontRightAlpha
= NULL
;
715 if (buffer
->BackRightAlpha
) {
716 MESA_PBUFFER_FREE( buffer
->BackRightAlpha
);
717 buffer
->BackRightAlpha
= NULL
;
725 /**********************************************************************/
726 /** \name Context allocation, initialization, destroying
728 * The purpose of the most initialization functions here is to provide the
729 * default state values according to the OpenGL specification.
731 /**********************************************************************/
735 * One-time initialization mutex lock.
737 * \sa Used by one_time_init().
739 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
742 * Calls all the various one-time-init functions in Mesa.
744 * While holding a global mutex lock, calls several initialization functions,
745 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
748 * \sa _mesa_init_lists(), _math_init().
751 one_time_init( GLcontext
*ctx
)
753 static GLboolean alreadyCalled
= GL_FALSE
;
754 _glthread_LOCK_MUTEX(OneTimeLock
);
755 if (!alreadyCalled
) {
758 /* do some implementation tests */
759 assert( sizeof(GLbyte
) == 1 );
760 assert( sizeof(GLshort
) >= 2 );
761 assert( sizeof(GLint
) >= 4 );
762 assert( sizeof(GLubyte
) == 1 );
763 assert( sizeof(GLushort
) >= 2 );
764 assert( sizeof(GLuint
) >= 4 );
771 for (i
= 0; i
< 256; i
++) {
772 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
777 _mesa_init_sparc_glapi_relocs();
779 if (_mesa_getenv("MESA_DEBUG")) {
780 _glapi_noop_enable_warnings(GL_TRUE
);
781 #ifndef GLX_DIRECT_RENDERING
782 /* libGL from before 2002/06/28 don't have this function. Someday,
783 * when newer libGL libs are common, remove the #ifdef test. This
784 * only serves to print warnings when calling undefined GL functions.
786 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
790 _glapi_noop_enable_warnings(GL_FALSE
);
793 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
794 _mesa_debug(ctx
, "Mesa DEBUG build %s %s\n", __DATE__
, __TIME__
);
797 alreadyCalled
= GL_TRUE
;
799 _glthread_UNLOCK_MUTEX(OneTimeLock
);
803 * Allocate and initialize a shared context state structure.
805 * \return pointer to a gl_shared_state structure on success, or NULL on
808 * Initializes the display list, texture objects and vertex programs hash
809 * tables, allocates the texture objects. If it runs out of memory, frees
810 * everything already allocated before returning NULL.
813 alloc_shared_state( GLcontext
*ctx
)
815 struct gl_shared_state
*ss
= CALLOC_STRUCT(gl_shared_state
);
821 _glthread_INIT_MUTEX(ss
->Mutex
);
823 ss
->DisplayList
= _mesa_NewHashTable();
824 ss
->TexObjects
= _mesa_NewHashTable();
825 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
826 ss
->Programs
= _mesa_NewHashTable();
829 #if FEATURE_ARB_vertex_program
830 ss
->DefaultVertexProgram
= ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
831 if (!ss
->DefaultVertexProgram
)
834 #if FEATURE_ARB_fragment_program
835 ss
->DefaultFragmentProgram
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
836 if (!ss
->DefaultFragmentProgram
)
840 ss
->BufferObjects
= _mesa_NewHashTable();
842 ss
->Default1D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D
);
846 ss
->Default2D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D
);
850 ss
->Default3D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_3D
);
854 ss
->DefaultCubeMap
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_CUBE_MAP_ARB
);
855 if (!ss
->DefaultCubeMap
)
858 ss
->DefaultRect
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_RECTANGLE_NV
);
859 if (!ss
->DefaultRect
)
862 /* Effectively bind the default textures to all texture units */
863 ss
->Default1D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
864 ss
->Default2D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
865 ss
->Default3D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
866 ss
->DefaultCubeMap
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
867 ss
->DefaultRect
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
872 /* Ran out of memory at some point. Free everything and return NULL */
874 _mesa_DeleteHashTable(ss
->DisplayList
);
876 _mesa_DeleteHashTable(ss
->TexObjects
);
877 #if FEATURE_NV_vertex_program
879 _mesa_DeleteHashTable(ss
->Programs
);
881 #if FEATURE_ARB_vertex_program
882 if (ss
->DefaultVertexProgram
)
883 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
885 #if FEATURE_ARB_fragment_program
886 if (ss
->DefaultFragmentProgram
)
887 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
889 if (ss
->BufferObjects
)
890 _mesa_DeleteHashTable(ss
->BufferObjects
);
893 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
895 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
897 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
898 if (ss
->DefaultCubeMap
)
899 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
901 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
908 * Deallocate a shared state context and all children structures.
910 * \param ctx GL context.
911 * \param ss shared state pointer.
913 * Frees the display lists, the texture objects (calling the driver texture
914 * deletion callback to free its private data) and the vertex programs, as well
915 * as their hash tables.
917 * \sa alloc_shared_state().
920 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
)
922 /* Free display lists */
924 GLuint list
= _mesa_HashFirstEntry(ss
->DisplayList
);
926 _mesa_destroy_list(ctx
, list
);
932 _mesa_DeleteHashTable(ss
->DisplayList
);
934 /* Free texture objects */
935 ASSERT(ctx
->Driver
.DeleteTexture
);
937 GLuint texName
= _mesa_HashFirstEntry(ss
->TexObjects
);
939 struct gl_texture_object
*texObj
= (struct gl_texture_object
*)
940 _mesa_HashLookup(ss
->TexObjects
, texName
);
942 (*ctx
->Driver
.DeleteTexture
)(ctx
, texObj
);
943 _mesa_HashRemove(ss
->TexObjects
, texName
);
949 _mesa_DeleteHashTable(ss
->TexObjects
);
951 #if FEATURE_NV_vertex_program
952 /* Free vertex programs */
954 GLuint prog
= _mesa_HashFirstEntry(ss
->Programs
);
956 struct program
*p
= (struct program
*) _mesa_HashLookup(ss
->Programs
,
959 ctx
->Driver
.DeleteProgram(ctx
, p
);
960 _mesa_HashRemove(ss
->Programs
, prog
);
966 _mesa_DeleteHashTable(ss
->Programs
);
969 _mesa_DeleteHashTable(ss
->BufferObjects
);
971 _glthread_DESTROY_MUTEX(ss
->Mutex
);
978 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
981 _mesa_init_current( GLcontext
*ctx
)
986 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
987 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
990 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 1.0 );
991 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
992 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
993 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 0.0 );
994 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
], 0.0, 0.0, 0.0, 0.0 );
995 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++)
996 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_TEX0
+ i
], 0.0, 0.0, 0.0, 1.0);
997 ctx
->Current
.Index
= 1;
998 ctx
->Current
.EdgeFlag
= GL_TRUE
;
1003 * Initialize fields of gl_constants (aka ctx->Const.*).
1004 * Use defaults from config.h. The device drivers will often override
1005 * some of these values (such as number of texture units).
1008 _mesa_init_constants( GLcontext
*ctx
)
1012 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
1013 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
1015 /* Constants, may be overriden by device drivers */
1016 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
1017 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
1018 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
1019 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
1020 ctx
->Const
.MaxTextureUnits
= MAX_TEXTURE_UNITS
;
1021 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
1022 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
1023 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
1024 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
1025 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
1026 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
1027 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
1028 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
1029 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
1030 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
1031 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
1032 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
1033 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
1034 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
1035 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
1036 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
1037 ctx
->Const
.NumAuxBuffers
= NUM_AUX_BUFFERS
;
1038 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
1039 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
1040 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
1041 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
1042 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
1043 ctx
->Const
.MaxSpotExponent
= 128.0;
1044 ctx
->Const
.MaxShininess
= 128.0;
1045 #if FEATURE_ARB_vertex_program
1046 ctx
->Const
.MaxVertexProgramInstructions
= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS
;
1047 ctx
->Const
.MaxVertexProgramAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
1048 ctx
->Const
.MaxVertexProgramTemps
= MAX_NV_VERTEX_PROGRAM_TEMPS
;
1049 ctx
->Const
.MaxVertexProgramLocalParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
1050 ctx
->Const
.MaxVertexProgramEnvParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;/*XXX*/
1051 ctx
->Const
.MaxVertexProgramAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
1053 #if FEATURE_ARB_fragment_program
1054 ctx
->Const
.MaxFragmentProgramInstructions
= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS
;
1055 ctx
->Const
.MaxFragmentProgramAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
1056 ctx
->Const
.MaxFragmentProgramTemps
= MAX_NV_FRAGMENT_PROGRAM_TEMPS
;
1057 ctx
->Const
.MaxFragmentProgramLocalParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
1058 ctx
->Const
.MaxFragmentProgramEnvParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;/*XXX*/
1059 ctx
->Const
.MaxFragmentProgramAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
1060 ctx
->Const
.MaxFragmentProgramAluInstructions
= MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS
;
1061 ctx
->Const
.MaxFragmentProgramTexInstructions
= MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS
;
1062 ctx
->Const
.MaxFragmentProgramTexIndirections
= MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS
;
1064 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
1065 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
1067 /* If we're running in the X server, do bounds checking to prevent
1068 * segfaults and server crashes!
1070 #if defined(XFree86LOADER) && defined(IN_MODULE)
1071 ctx
->Const
.CheckArrayBounds
= GL_TRUE
;
1073 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
1076 ASSERT(ctx
->Const
.MaxTextureUnits
== MAX2(ctx
->Const
.MaxTextureImageUnits
, ctx
->Const
.MaxTextureCoordUnits
));
1081 * Initialize the attribute groups in a GL context.
1083 * \param ctx GL context.
1085 * Initializes all the attributes, calling the respective <tt>init*</tt>
1086 * functions for the more complex data structures.
1089 init_attrib_groups( GLcontext
*ctx
)
1094 _mesa_init_constants( ctx
);
1097 _mesa_init_extensions( ctx
);
1099 /* Attribute Groups */
1100 _mesa_init_accum( ctx
);
1101 _mesa_init_attrib( ctx
);
1102 _mesa_init_buffers( ctx
);
1103 _mesa_init_buffer_objects( ctx
);
1104 _mesa_init_color( ctx
);
1105 _mesa_init_colortables( ctx
);
1106 _mesa_init_current( ctx
);
1107 _mesa_init_depth( ctx
);
1108 _mesa_init_debug( ctx
);
1109 _mesa_init_display_list( ctx
);
1110 _mesa_init_eval( ctx
);
1111 _mesa_init_feedback( ctx
);
1112 _mesa_init_fog( ctx
);
1113 _mesa_init_histogram( ctx
);
1114 _mesa_init_hint( ctx
);
1115 _mesa_init_line( ctx
);
1116 _mesa_init_lighting( ctx
);
1117 _mesa_init_matrix( ctx
);
1118 _mesa_init_occlude( ctx
);
1119 _mesa_init_pixel( ctx
);
1120 _mesa_init_point( ctx
);
1121 _mesa_init_polygon( ctx
);
1122 _mesa_init_program( ctx
);
1123 _mesa_init_rastpos( ctx
);
1124 _mesa_init_stencil( ctx
);
1125 _mesa_init_transform( ctx
);
1126 _mesa_init_varray( ctx
);
1127 _mesa_init_viewport( ctx
);
1129 if (!_mesa_init_texture( ctx
))
1133 ctx
->NewState
= _NEW_ALL
;
1134 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
1135 ctx
->CatchSignals
= GL_TRUE
;
1143 * If the DRI libGL.so library is old, it may not have the entrypoints for
1144 * some recent OpenGL extensions. Dynamically add them now.
1145 * If we're building stand-alone Mesa where libGL.so has both the dispatcher
1146 * and driver code, this won't be an issue (and calling this function won't
1150 add_newer_entrypoints(void)
1153 static const struct {
1154 const char * const name
;
1157 newer_entrypoints
[] = {
1158 /* GL_ARB_window_pos aliases with GL_MESA_window_pos */
1159 { "glWindowPos2dARB", 513 },
1160 { "glWindowPos2dvARB", 514 },
1161 { "glWindowPos2fARB", 515 },
1162 { "glWindowPos2fvARB", 516 },
1163 { "glWindowPos2iARB", 517 },
1164 { "glWindowPos2ivARB", 518 },
1165 { "glWindowPos2sARB", 519 },
1166 { "glWindowPos2svARB", 520 },
1167 { "glWindowPos3dARB", 521 },
1168 { "glWindowPos3dvARB", 522 },
1169 { "glWindowPos3fARB", 523 },
1170 { "glWindowPos3fvARB", 524 },
1171 { "glWindowPos3iARB", 525 },
1172 { "glWindowPos3ivARB", 526 },
1173 { "glWindowPos3sARB", 527 },
1174 { "glWindowPos3svARB", 528 },
1175 #if FEATURE_NV_vertex_program
1176 { "glAreProgramsResidentNV", 578 },
1177 { "glBindProgramNV", 579 },
1178 { "glDeleteProgramsNV", 580 },
1179 { "glExecuteProgramNV", 581 },
1180 { "glGenProgramsNV", 582 },
1181 { "glGetProgramParameterdvNV", 583 },
1182 { "glGetProgramParameterfvNV", 584 },
1183 { "glGetProgramivNV", 585 },
1184 { "glGetProgramStringNV", 586 },
1185 { "glGetTrackMatrixivNV", 587 },
1186 { "glGetVertexAttribdvNV", 588 },
1187 { "glGetVertexAttribfvNV", 589 },
1188 { "glGetVertexAttribivNV", 590 },
1189 { "glGetVertexAttribPointervNV", 591 },
1190 { "glIsProgramNV", 592 },
1191 { "glLoadProgramNV", 593 },
1192 { "glProgramParameter4dNV", 594 },
1193 { "glProgramParameter4dvNV", 595 },
1194 { "glProgramParameter4fNV", 596 },
1195 { "glProgramParameter4fvNV", 597 },
1196 { "glProgramParameters4dvNV", 598 },
1197 { "glProgramParameters4fvNV", 599 },
1198 { "glRequestResidentProgramsNV", 600 },
1199 { "glTrackMatrixNV", 601 },
1200 { "glVertexAttribPointerNV", 602 },
1201 { "glVertexAttrib1dNV", 603 },
1202 { "glVertexAttrib1dvNV", 604 },
1203 { "glVertexAttrib1fNV", 605 },
1204 { "glVertexAttrib1fvNV", 606 },
1205 { "glVertexAttrib1sNV", 607 },
1206 { "glVertexAttrib1svNV", 608 },
1207 { "glVertexAttrib2dNV", 609 },
1208 { "glVertexAttrib2dvNV", 610 },
1209 { "glVertexAttrib2fNV", 611 },
1210 { "glVertexAttrib2fvNV", 612 },
1211 { "glVertexAttrib2sNV", 613 },
1212 { "glVertexAttrib2svNV", 614 },
1213 { "glVertexAttrib3dNV", 615 },
1214 { "glVertexAttrib3dvNV", 616 },
1215 { "glVertexAttrib3fNV", 617 },
1216 { "glVertexAttrib3fvNV", 618 },
1217 { "glVertexAttrib3sNV", 619 },
1218 { "glVertexAttrib3svNV", 620 },
1219 { "glVertexAttrib4dNV", 621 },
1220 { "glVertexAttrib4dvNV", 622 },
1221 { "glVertexAttrib4fNV", 623 },
1222 { "glVertexAttrib4fvNV", 624 },
1223 { "glVertexAttrib4sNV", 625 },
1224 { "glVertexAttrib4svNV", 626 },
1225 { "glVertexAttrib4ubNV", 627 },
1226 { "glVertexAttrib4ubvNV", 628 },
1227 { "glVertexAttribs1dvNV", 629 },
1228 { "glVertexAttribs1fvNV", 630 },
1229 { "glVertexAttribs1svNV", 631 },
1230 { "glVertexAttribs2dvNV", 632 },
1231 { "glVertexAttribs2fvNV", 633 },
1232 { "glVertexAttribs2svNV", 634 },
1233 { "glVertexAttribs3dvNV", 635 },
1234 { "glVertexAttribs3fvNV", 636 },
1235 { "glVertexAttribs3svNV", 637 },
1236 { "glVertexAttribs4dvNV", 638 },
1237 { "glVertexAttribs4fvNV", 639 },
1238 { "glVertexAttribs4svNV", 640 },
1239 { "glVertexAttribs4ubvNV", 641 },
1241 { "glPointParameteriNV", 642 },
1242 { "glPointParameterivNV", 643 },
1243 { "glMultiDrawArraysEXT", 644 },
1244 { "glMultiDrawElementsEXT", 645 },
1245 { "glMultiDrawArraysSUN", _gloffset_MultiDrawArraysEXT
},
1246 { "glMultiDrawElementsSUN", _gloffset_MultiDrawElementsEXT
},
1247 { "glActiveStencilFaceEXT", 646 },
1248 #if FEATURE_NV_fence
1249 { "glDeleteFencesNV", 647 },
1250 { "glGenFencesNV", 648 },
1251 { "glIsFenceNV", 649 },
1252 { "glTestFenceNV", 650 },
1253 { "glGetFenceivNV", 651 },
1254 { "glFinishFenceNV", 652 },
1255 { "glSetFenceNV", 653 },
1257 #if FEATURE_NV_fragment_program
1258 { "glProgramNamedParameter4fNV", 682 },
1259 { "glProgramNamedParameter4dNV", 683 },
1260 { "glProgramNamedParameter4fvNV", 683 },
1261 { "glProgramNamedParameter4dvNV", 684 },
1262 { "glGetProgramNamedParameterfvNV", 685 },
1263 { "glGetProgramNamedParameterdvNV", 686 },
1265 #if FEATURE_ARB_vertex_program
1266 { "glVertexAttrib1sARB", _gloffset_VertexAttrib1sNV
},
1267 { "glVertexAttrib1fARB", _gloffset_VertexAttrib1fNV
},
1268 { "glVertexAttrib1dARB", _gloffset_VertexAttrib1dNV
},
1269 { "glVertexAttrib2sARB", _gloffset_VertexAttrib2sNV
},
1270 { "glVertexAttrib2fARB", _gloffset_VertexAttrib2fNV
},
1271 { "glVertexAttrib2dARB", _gloffset_VertexAttrib2dNV
},
1272 { "glVertexAttrib3sARB", _gloffset_VertexAttrib3sNV
},
1273 { "glVertexAttrib3fARB", _gloffset_VertexAttrib3fNV
},
1274 { "glVertexAttrib3dARB", _gloffset_VertexAttrib3dNV
},
1275 { "glVertexAttrib4sARB", _gloffset_VertexAttrib4sNV
},
1276 { "glVertexAttrib4fARB", _gloffset_VertexAttrib4fNV
},
1277 { "glVertexAttrib4dARB", _gloffset_VertexAttrib4dNV
},
1278 { "glVertexAttrib4NubARB", _gloffset_VertexAttrib4ubNV
},
1279 { "glVertexAttrib1svARB", _gloffset_VertexAttrib1svNV
},
1280 { "glVertexAttrib1fvARB", _gloffset_VertexAttrib1fvNV
},
1281 { "glVertexAttrib1dvARB", _gloffset_VertexAttrib1dvNV
},
1282 { "glVertexAttrib2svARB", _gloffset_VertexAttrib2svNV
},
1283 { "glVertexAttrib2fvARB", _gloffset_VertexAttrib2fvNV
},
1284 { "glVertexAttrib2dvARB", _gloffset_VertexAttrib2dvNV
},
1285 { "glVertexAttrib3svARB", _gloffset_VertexAttrib3svNV
},
1286 { "glVertexAttrib3fvARB", _gloffset_VertexAttrib3fvNV
},
1287 { "glVertexAttrib3dvARB", _gloffset_VertexAttrib3dvNV
},
1288 { "glVertexAttrib4bvARB", _gloffset_VertexAttrib4bvARB
},
1289 { "glVertexAttrib4svARB", _gloffset_VertexAttrib4svNV
},
1290 { "glVertexAttrib4ivARB", _gloffset_VertexAttrib4ivARB
},
1291 { "glVertexAttrib4ubvARB", _gloffset_VertexAttrib4ubvARB
},
1292 { "glVertexAttrib4usvARB", _gloffset_VertexAttrib4usvARB
},
1293 { "glVertexAttrib4uivARB", _gloffset_VertexAttrib4uivARB
},
1294 { "glVertexAttrib4fvARB", _gloffset_VertexAttrib4fvNV
},
1295 { "glVertexAttrib4dvARB", _gloffset_VertexAttrib4dvNV
},
1296 { "glVertexAttrib4NbvARB", _gloffset_VertexAttrib4NbvARB
},
1297 { "glVertexAttrib4NsvARB", _gloffset_VertexAttrib4NsvARB
},
1298 { "glVertexAttrib4NivARB", _gloffset_VertexAttrib4NivARB
},
1299 { "glVertexAttrib4NubvARB", _gloffset_VertexAttrib4ubvNV
},
1300 { "glVertexAttrib4NusvARB", _gloffset_VertexAttrib4NusvARB
},
1301 { "glVertexAttrib4NuivARB", _gloffset_VertexAttrib4NuivARB
},
1302 { "glVertexAttribPointerARB", _gloffset_VertexAttribPointerARB
},
1303 { "glEnableVertexAttribArrayARB", _gloffset_EnableVertexAttribArrayARB
},
1304 { "glDisableVertexAttribArrayARB", _gloffset_DisableVertexAttribArrayARB
},
1305 { "glProgramStringARB", _gloffset_ProgramStringARB
},
1306 { "glBindProgramARB", _gloffset_BindProgramNV
},
1307 { "glDeleteProgramsARB", _gloffset_DeleteProgramsNV
},
1308 { "glGenProgramsARB", _gloffset_GenProgramsNV
},
1309 { "glIsProgramARB", _gloffset_IsProgramNV
},
1310 { "glProgramEnvParameter4dARB", _gloffset_ProgramEnvParameter4dARB
},
1311 { "glProgramEnvParameter4dvARB", _gloffset_ProgramEnvParameter4dvARB
},
1312 { "glProgramEnvParameter4fARB", _gloffset_ProgramEnvParameter4fARB
},
1313 { "glProgramEnvParameter4fvARB", _gloffset_ProgramEnvParameter4fvARB
},
1314 { "glProgramLocalParameter4dARB", _gloffset_ProgramLocalParameter4dARB
},
1315 { "glProgramLocalParameter4dvARB", _gloffset_ProgramLocalParameter4dvARB
},
1316 { "glProgramLocalParameter4fARB", _gloffset_ProgramLocalParameter4fARB
},
1317 { "glProgramLocalParameter4fvARB", _gloffset_ProgramLocalParameter4fvARB
},
1318 { "glGetProgramEnvParameterdvARB", _gloffset_GetProgramEnvParameterdvARB
},
1319 { "glGetProgramEnvParameterfvARB", _gloffset_GetProgramEnvParameterfvARB
},
1320 { "glGetProgramLocalParameterdvARB", _gloffset_GetProgramLocalParameterdvARB
},
1321 { "glGetProgramLocalParameterfvARB", _gloffset_GetProgramLocalParameterfvARB
},
1322 { "glGetProgramivARB", _gloffset_GetProgramivARB
},
1323 { "glGetProgramStringARB", _gloffset_GetProgramStringARB
},
1324 { "glGetVertexAttribdvARB", _gloffset_GetVertexAttribdvNV
},
1325 { "glGetVertexAttribfvARB", _gloffset_GetVertexAttribfvNV
},
1326 { "glGetVertexAttribivARB", _gloffset_GetVertexAttribivNV
},
1327 { "glGetVertexAttribPointervARB", _gloffset_GetVertexAttribPointervNV
},
1329 { "glMultiModeDrawArraysIBM", _gloffset_MultiModeDrawArraysIBM
},
1330 { "glMultiModeDrawElementsIBM", _gloffset_MultiModeDrawElementsIBM
},
1333 for ( i
= 0 ; i
< Elements(newer_entrypoints
) ; i
++ ) {
1334 _glapi_add_entrypoint( newer_entrypoints
[i
].name
,
1335 newer_entrypoints
[i
].offset
);
1341 * Initialize a GLcontext struct (rendering context).
1343 * This includes allocating all the other structs and arrays which hang off of
1344 * the context by pointers.
1345 * Note that the driver needs to pass in its dd_function_table here since
1346 * we need to at least call driverFunctions->NewTextureObject to create the
1347 * default texture objects.
1349 * Called by _mesa_create_context().
1351 * Performs the imports and exports callback tables initialization, and
1352 * miscellaneous one-time initializations. If no shared context is supplied one
1353 * is allocated, and increase its reference count. Setups the GL API dispatch
1354 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1355 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1358 * \param ctx the context to initialize
1359 * \param visual describes the visual attributes for this context
1360 * \param share_list points to context to share textures, display lists,
1362 * \param driverFunctions table of device driver functions for this context
1364 * \param driverContext pointer to driver-specific context data
1367 _mesa_initialize_context( GLcontext
*ctx
,
1368 const GLvisual
*visual
,
1369 GLcontext
*share_list
,
1370 const struct dd_function_table
*driverFunctions
,
1371 void *driverContext
)
1373 GLuint dispatchSize
;
1375 ASSERT(driverContext
);
1376 assert(driverFunctions
->NewTextureObject
);
1378 /* If the driver wants core Mesa to use special imports, it'll have to
1379 * override these defaults.
1381 _mesa_init_default_imports( &(ctx
->imports
), driverContext
);
1383 /* initialize the exports (Mesa functions called by the window system) */
1384 _mesa_init_default_exports( &(ctx
->exports
) );
1386 /* misc one-time initializations */
1389 ctx
->Visual
= *visual
;
1390 ctx
->DrawBuffer
= NULL
;
1391 ctx
->ReadBuffer
= NULL
;
1393 /* Plug in driver functions and context pointer here.
1394 * This is important because when we call alloc_shared_state() below
1395 * we'll call ctx->Driver.NewTextureObject() to create the default
1398 ctx
->Driver
= *driverFunctions
;
1399 ctx
->DriverCtx
= driverContext
;
1402 /* share state with another context */
1403 ctx
->Shared
= share_list
->Shared
;
1406 /* allocate new, unshared state */
1407 if (!alloc_shared_state( ctx
)) {
1411 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1412 ctx
->Shared
->RefCount
++;
1413 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1415 if (!init_attrib_groups( ctx
)) {
1416 free_shared_state(ctx
, ctx
->Shared
);
1420 /* libGL ABI coordination */
1421 add_newer_entrypoints();
1423 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1424 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1425 * Mesa we do this to accomodate different versions of libGL and various
1428 dispatchSize
= MAX2(_glapi_get_dispatch_table_size(),
1429 sizeof(struct _glapi_table
) / sizeof(void *));
1431 /* setup API dispatch tables */
1432 ctx
->Exec
= (struct _glapi_table
*) CALLOC(dispatchSize
* sizeof(void*));
1433 ctx
->Save
= (struct _glapi_table
*) CALLOC(dispatchSize
* sizeof(void*));
1434 if (!ctx
->Exec
|| !ctx
->Save
) {
1435 free_shared_state(ctx
, ctx
->Shared
);
1439 _mesa_init_exec_table(ctx
->Exec
, dispatchSize
);
1440 ctx
->CurrentDispatch
= ctx
->Exec
;
1443 _mesa_init_dlist_table(ctx
->Save
, dispatchSize
);
1444 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
1447 /* Neutral tnl module stuff */
1448 _mesa_init_exec_vtxfmt( ctx
);
1449 ctx
->TnlModule
.Current
= NULL
;
1450 ctx
->TnlModule
.SwapCount
= 0;
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
);
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 #if FEATURE_NV_vertex_program
1520 if (ctx
->VertexProgram
.Current
) {
1521 ctx
->VertexProgram
.Current
->Base
.RefCount
--;
1522 if (ctx
->VertexProgram
.Current
->Base
.RefCount
<= 0)
1523 ctx
->Driver
.DeleteProgram(ctx
, &(ctx
->VertexProgram
.Current
->Base
));
1526 #if FEATURE_NV_fragment_program
1527 if (ctx
->FragmentProgram
.Current
) {
1528 ctx
->FragmentProgram
.Current
->Base
.RefCount
--;
1529 if (ctx
->FragmentProgram
.Current
->Base
.RefCount
<= 0)
1530 ctx
->Driver
.DeleteProgram(ctx
, &(ctx
->FragmentProgram
.Current
->Base
));
1534 /* Shared context state (display lists, textures, etc) */
1535 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1536 ctx
->Shared
->RefCount
--;
1537 assert(ctx
->Shared
->RefCount
>= 0);
1538 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1539 if (ctx
->Shared
->RefCount
== 0) {
1540 /* free shared state */
1541 free_shared_state( ctx
, ctx
->Shared
);
1544 if (ctx
->Extensions
.String
)
1545 FREE((void *) ctx
->Extensions
.String
);
1553 * Destroy a GLcontext structure.
1555 * \param ctx GL context.
1557 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1560 _mesa_destroy_context( GLcontext
*ctx
)
1563 _mesa_free_context_data(ctx
);
1564 FREE( (void *) ctx
);
1571 * Copy attribute groups from one context to another.
1573 * \param src source context
1574 * \param dst destination context
1575 * \param mask bitwise OR of GL_*_BIT flags
1577 * According to the bits specified in \p mask, copies the corresponding
1578 * attributes from \p src into \dst. For many of the attributes a simple \c
1579 * memcpy is not enough due to the existence of internal pointers in their data
1583 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1585 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1587 dst
->Accum
= src
->Accum
;
1589 if (mask
& GL_COLOR_BUFFER_BIT
) {
1591 dst
->Color
= src
->Color
;
1593 if (mask
& GL_CURRENT_BIT
) {
1595 dst
->Current
= src
->Current
;
1597 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1599 dst
->Depth
= src
->Depth
;
1601 if (mask
& GL_ENABLE_BIT
) {
1604 if (mask
& GL_EVAL_BIT
) {
1606 dst
->Eval
= src
->Eval
;
1608 if (mask
& GL_FOG_BIT
) {
1610 dst
->Fog
= src
->Fog
;
1612 if (mask
& GL_HINT_BIT
) {
1614 dst
->Hint
= src
->Hint
;
1616 if (mask
& GL_LIGHTING_BIT
) {
1618 /* begin with memcpy */
1619 MEMCPY( &dst
->Light
, &src
->Light
, sizeof(struct gl_light
) );
1620 /* fixup linked lists to prevent pointer insanity */
1621 make_empty_list( &(dst
->Light
.EnabledList
) );
1622 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1623 if (dst
->Light
.Light
[i
].Enabled
) {
1624 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1628 if (mask
& GL_LINE_BIT
) {
1630 dst
->Line
= src
->Line
;
1632 if (mask
& GL_LIST_BIT
) {
1634 dst
->List
= src
->List
;
1636 if (mask
& GL_PIXEL_MODE_BIT
) {
1638 dst
->Pixel
= src
->Pixel
;
1640 if (mask
& GL_POINT_BIT
) {
1642 dst
->Point
= src
->Point
;
1644 if (mask
& GL_POLYGON_BIT
) {
1646 dst
->Polygon
= src
->Polygon
;
1648 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1649 /* Use loop instead of MEMCPY due to problem with Portland Group's
1650 * C compiler. Reported by John Stone.
1653 for (i
= 0; i
< 32; i
++) {
1654 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1657 if (mask
& GL_SCISSOR_BIT
) {
1659 dst
->Scissor
= src
->Scissor
;
1661 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1663 dst
->Stencil
= src
->Stencil
;
1665 if (mask
& GL_TEXTURE_BIT
) {
1666 /* Cannot memcpy because of pointers */
1667 _mesa_copy_texture_state(src
, dst
);
1669 if (mask
& GL_TRANSFORM_BIT
) {
1671 dst
->Transform
= src
->Transform
;
1673 if (mask
& GL_VIEWPORT_BIT
) {
1674 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1675 dst
->Viewport
.X
= src
->Viewport
.X
;
1676 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1677 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1678 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1679 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1680 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1681 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1684 /* XXX FIXME: Call callbacks?
1686 dst
->NewState
= _NEW_ALL
;
1692 * Check if the given context can render into the given framebuffer
1693 * by checking visual attributes.
1694 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1697 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1699 const GLvisual
*ctxvis
= &ctx
->Visual
;
1700 const GLvisual
*bufvis
= &buffer
->Visual
;
1702 if (ctxvis
== bufvis
)
1705 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1707 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1709 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1711 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1713 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1715 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1717 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1719 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1721 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1723 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1725 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1733 * Set the current context, binding the given frame buffer to the context.
1735 * \param newCtx new GL context.
1736 * \param buffer framebuffer.
1738 * Calls _mesa_make_current2() with \p buffer as read and write framebuffer.
1741 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*buffer
)
1743 _mesa_make_current2( newCtx
, buffer
, buffer
);
1747 * Bind the given context to the given draw-buffer and read-buffer and
1748 * make it the current context for this thread.
1750 * \param newCtx new GL context. If NULL then there will be no current GL
1752 * \param drawBuffer draw framebuffer.
1753 * \param readBuffer read framebuffer.
1755 * Check that the context's and framebuffer's visuals are compatible, returning
1756 * immediately otherwise. Sets the glapi current context via
1757 * _glapi_set_context(). If \p newCtx is not NULL, associates \p drawBuffer and
1758 * \p readBuffer with it and calls dd_function_table::ResizeBuffers if the buffers size has changed.
1759 * Calls dd_function_table::MakeCurrent callback if defined.
1761 * When a context is bound by the first time and the \c MESA_INFO environment
1762 * variable is set it calls print_info() as an aid for remote user
1766 _mesa_make_current2( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1767 GLframebuffer
*readBuffer
)
1770 _mesa_debug(newCtx
, "_mesa_make_current2()\n");
1772 /* Check that the context's and framebuffer's visuals are compatible.
1774 if (newCtx
&& drawBuffer
&& newCtx
->DrawBuffer
!= drawBuffer
) {
1775 if (!check_compatible(newCtx
, drawBuffer
))
1778 if (newCtx
&& readBuffer
&& newCtx
->ReadBuffer
!= readBuffer
) {
1779 if (!check_compatible(newCtx
, readBuffer
))
1783 /* We call this function periodically (just here for now) in
1784 * order to detect when multithreading has begun.
1786 _glapi_check_multithread();
1788 _glapi_set_context((void *) newCtx
);
1789 ASSERT(_mesa_get_current_context() == newCtx
);
1793 _glapi_set_dispatch(NULL
); /* none current */
1796 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1798 if (drawBuffer
&& readBuffer
) {
1799 /* TODO: check if newCtx and buffer's visual match??? */
1800 newCtx
->DrawBuffer
= drawBuffer
;
1801 newCtx
->ReadBuffer
= readBuffer
;
1802 newCtx
->NewState
|= _NEW_BUFFERS
;
1805 if (drawBuffer
->Width
== 0 && drawBuffer
->Height
== 0) {
1806 /* get initial window size */
1807 GLuint bufWidth
, bufHeight
;
1809 /* ask device driver for size of output buffer */
1810 (*newCtx
->Driver
.GetBufferSize
)( drawBuffer
, &bufWidth
, &bufHeight
);
1812 if (drawBuffer
->Width
!= bufWidth
||
1813 drawBuffer
->Height
!= bufHeight
) {
1815 drawBuffer
->Width
= bufWidth
;
1816 drawBuffer
->Height
= bufHeight
;
1818 newCtx
->Driver
.ResizeBuffers( drawBuffer
);
1822 if (readBuffer
!= drawBuffer
&&
1823 readBuffer
->Width
== 0 && readBuffer
->Height
== 0) {
1824 /* get initial window size */
1825 GLuint bufWidth
, bufHeight
;
1827 /* ask device driver for size of output buffer */
1828 (*newCtx
->Driver
.GetBufferSize
)( readBuffer
, &bufWidth
, &bufHeight
);
1830 if (readBuffer
->Width
!= bufWidth
||
1831 readBuffer
->Height
!= bufHeight
) {
1833 readBuffer
->Width
= bufWidth
;
1834 readBuffer
->Height
= bufHeight
;
1836 newCtx
->Driver
.ResizeBuffers( readBuffer
);
1842 /* Alert the driver - usually passed on to the sw t&l module,
1843 * but also used to detect threaded cases in the radeon codegen
1846 if (newCtx
->Driver
.MakeCurrent
)
1847 newCtx
->Driver
.MakeCurrent( newCtx
, drawBuffer
, readBuffer
);
1849 /* We can use this to help debug user's problems. Tell them to set
1850 * the MESA_INFO env variable before running their app. Then the
1851 * first time each context is made current we'll print some useful
1854 if (newCtx
->FirstTimeCurrent
) {
1855 if (_mesa_getenv("MESA_INFO")) {
1858 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1864 * Get current context for the calling thread.
1866 * \return pointer to the current GL context.
1868 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1869 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in context.h.
1872 _mesa_get_current_context( void )
1874 return (GLcontext
*) _glapi_get_context();
1878 * Get context's current API dispatch table.
1880 * It'll either be the immediate-mode execute dispatcher or the display list
1881 * compile dispatcher.
1883 * \param ctx GL context.
1885 * \return pointer to dispatch_table.
1887 * Simply returns __GLcontextRec::CurrentDispatch.
1889 struct _glapi_table
*
1890 _mesa_get_dispatch(GLcontext
*ctx
)
1892 return ctx
->CurrentDispatch
;
1898 /**********************************************************************/
1899 /** \name Miscellaneous functions */
1900 /**********************************************************************/
1906 * \param ctx GL context.
1907 * \param error error code.
1909 * Records the given error code and call the driver's dd_function_table::Error
1910 * function if defined.
1913 * This is called via _mesa_error().
1916 _mesa_record_error( GLcontext
*ctx
, GLenum error
)
1921 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1922 ctx
->ErrorValue
= error
;
1925 /* Call device driver's error handler, if any. This is used on the Mac. */
1926 if (ctx
->Driver
.Error
) {
1927 (*ctx
->Driver
.Error
)( ctx
);
1932 * Execute glFinish().
1934 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1935 * dd_function_table::Finish driver callback, if not NULL.
1938 _mesa_Finish( void )
1940 GET_CURRENT_CONTEXT(ctx
);
1941 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1942 if (ctx
->Driver
.Finish
) {
1943 (*ctx
->Driver
.Finish
)( ctx
);
1948 * Execute glFlush().
1950 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1951 * dd_function_table::Flush driver callback, if not NULL.
1956 GET_CURRENT_CONTEXT(ctx
);
1957 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1958 if (ctx
->Driver
.Flush
) {
1959 (*ctx
->Driver
.Flush
)( ctx
);