3 * Mesa context/visual/framebuffer management functions.
8 * Mesa 3-D graphics library
11 * Copyright (C) 1999-2006 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"
103 #include "atifragshader.h"
112 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
116 #include "simple_list.h"
119 #include "texcompress.h"
120 #include "teximage.h"
122 #include "texstate.h"
128 #include "math/m_translate.h"
129 #include "math/m_matrix.h"
130 #include "math/m_xform.h"
131 #include "math/mathmod.h"
133 #include "shaderobjects.h"
136 #include "sparc/sparc.h"
140 int MESA_VERBOSE
= 0;
143 #ifndef MESA_DEBUG_FLAGS
144 int MESA_DEBUG_FLAGS
= 0;
148 /* ubyte -> float conversion */
149 GLfloat _mesa_ubyte_to_float_color_tab
[256];
152 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
);
155 /**********************************************************************/
156 /** \name OpenGL SI-style interface (new in Mesa 3.5)
159 * \note Most of these functions are never called in the Mesa subset.
165 * Destroy context callback.
168 * \return GL_TRUE on success, or GL_FALSE on failure.
171 * Called by window system/device driver (via __GLexports::destroyCurrent) when
172 * the rendering context is to be destroyed.
175 * Frees the context data and the context structure.
178 _mesa_destroyContext(__GLcontext
*gc
)
181 _mesa_free_context_data(gc
);
188 * Unbind context callback.
191 * \return GL_TRUE on success, or GL_FALSE on failure.
194 * Called by window system/device driver (via __GLexports::loseCurrent)
195 * when the rendering context is made non-current.
201 _mesa_loseCurrent(__GLcontext
*gc
)
203 /* XXX unbind context from thread */
209 * Bind context callback.
212 * \return GL_TRUE on success, or GL_FALSE on failure.
215 * Called by window system/device driver (via __GLexports::makeCurrent)
216 * when the rendering context is made current.
222 _mesa_makeCurrent(__GLcontext
*gc
)
224 /* XXX bind context to thread */
230 * Share context callback.
233 * \param gcShare shared context.
234 * \return GL_TRUE on success, or GL_FALSE on failure.
237 * Called by window system/device driver (via __GLexports::shareContext)
240 * Update the shared context reference count, gl_shared_state::RefCount.
243 _mesa_shareContext(__GLcontext
*gc
, __GLcontext
*gcShare
)
245 if (gc
&& gcShare
&& gc
->Shared
&& gcShare
->Shared
) {
246 gc
->Shared
->RefCount
--;
247 if (gc
->Shared
->RefCount
== 0) {
248 free_shared_state(gc
, gc
->Shared
);
250 gc
->Shared
= gcShare
->Shared
;
251 gc
->Shared
->RefCount
++;
262 * Copy context callback.
265 _mesa_copyContext(__GLcontext
*dst
, const __GLcontext
*src
, GLuint mask
)
268 _mesa_copy_context( src
, dst
, mask
);
279 _mesa_forceCurrent(__GLcontext
*gc
)
286 * Windows/buffer resizing notification callback.
288 * \param gc GL context.
289 * \return GL_TRUE on success, or GL_FALSE on failure.
292 _mesa_notifyResize(__GLcontext
*gc
)
295 GLuint width
, height
;
296 __GLdrawablePrivate
*d
= gc
->imports
.getDrawablePrivate(gc
);
297 if (!d
|| !d
->getDrawableSize
)
299 d
->getDrawableSize( d
, &x
, &y
, &width
, &height
);
300 /* update viewport, resize software buffers, etc. */
305 * Window/buffer destruction notification callback.
307 * \param gc GL context.
309 * Called when the context's window/buffer is going to be destroyed.
314 _mesa_notifyDestroy(__GLcontext
*gc
)
316 /* Unbind from it. */
321 * Swap buffers notification callback.
323 * \param gc GL context.
325 * Called by window system just before swapping buffers.
326 * We have to finish any pending rendering.
329 _mesa_notifySwapBuffers(__GLcontext
*gc
)
331 FLUSH_VERTICES( gc
, 0 );
335 struct __GLdispatchStateRec
*
336 _mesa_dispatchExec(__GLcontext
*gc
)
344 _mesa_beginDispatchOverride(__GLcontext
*gc
)
351 _mesa_endDispatchOverride(__GLcontext
*gc
)
360 * The window system will call these functions when it needs Mesa to do
363 * \note Device drivers should override these functions! For example,
364 * the Xlib driver should plug in the XMesa*-style functions into this
365 * structure. The XMesa-style functions should then call the _mesa_*
366 * version of these functions. This is an approximation to OO design
367 * (inheritance and virtual functions).
376 _mesa_init_default_exports(__GLexports
*exports
)
379 exports
->destroyContext
= _mesa_destroyContext
;
380 exports
->loseCurrent
= _mesa_loseCurrent
;
381 exports
->makeCurrent
= _mesa_makeCurrent
;
382 exports
->shareContext
= _mesa_shareContext
;
383 exports
->copyContext
= _mesa_copyContext
;
384 exports
->forceCurrent
= _mesa_forceCurrent
;
385 exports
->notifyResize
= _mesa_notifyResize
;
386 exports
->notifyDestroy
= _mesa_notifyDestroy
;
387 exports
->notifySwapBuffers
= _mesa_notifySwapBuffers
;
388 exports
->dispatchExec
= _mesa_dispatchExec
;
389 exports
->beginDispatchOverride
= _mesa_beginDispatchOverride
;
390 exports
->endDispatchOverride
= _mesa_endDispatchOverride
;
397 * Exported OpenGL SI interface.
400 __glCoreCreateContext(__GLimports
*imports
, __GLcontextModes
*modes
)
404 ctx
= (GLcontext
*) (*imports
->calloc
)(NULL
, 1, sizeof(GLcontext
));
409 /* XXX doesn't work at this time */
410 _mesa_initialize_context(ctx
, modes
, NULL
, NULL
, NULL
);
411 ctx
->imports
= *imports
;
417 * Exported OpenGL SI interface.
420 __glCoreNopDispatch(void)
424 __gl_dispatch
= __glNopDispatchState
;
427 _glapi_set_dispatch(NULL
);
434 /**********************************************************************/
435 /** \name GL Visual allocation/destruction */
436 /**********************************************************************/
440 * Allocates a GLvisual structure and initializes it via
441 * _mesa_initialize_visual().
443 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
444 * \param dbFlag double buffering
445 * \param stereoFlag stereo buffer
446 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
447 * is acceptable but the actual depth type will be GLushort or GLuint as
449 * \param stencilBits requested minimum bits per stencil buffer value
450 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
451 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
452 * \param redBits number of bits per color component in frame buffer for RGB(A)
453 * mode. We always use 8 in core Mesa though.
454 * \param greenBits same as above.
455 * \param blueBits same as above.
456 * \param alphaBits same as above.
457 * \param numSamples not really used.
459 * \return pointer to new GLvisual or NULL if requested parameters can't be
462 * \note Need to add params for level and numAuxBuffers (at least)
465 _mesa_create_visual( GLboolean rgbFlag
,
467 GLboolean stereoFlag
,
476 GLint accumGreenBits
,
478 GLint accumAlphaBits
,
481 GLvisual
*vis
= (GLvisual
*) CALLOC( sizeof(GLvisual
) );
483 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
484 redBits
, greenBits
, blueBits
, alphaBits
,
485 indexBits
, depthBits
, stencilBits
,
486 accumRedBits
, accumGreenBits
,
487 accumBlueBits
, accumAlphaBits
,
497 * Makes some sanity checks and fills in the fields of the
498 * GLvisual object with the given parameters. If the caller needs
499 * to set additional fields, he should just probably init the whole GLvisual
501 * \return GL_TRUE on success, or GL_FALSE on failure.
503 * \sa _mesa_create_visual() above for the parameter description.
506 _mesa_initialize_visual( GLvisual
*vis
,
509 GLboolean stereoFlag
,
518 GLint accumGreenBits
,
520 GLint accumAlphaBits
,
525 if (depthBits
< 0 || depthBits
> 32) {
528 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
531 assert(accumRedBits
>= 0);
532 assert(accumGreenBits
>= 0);
533 assert(accumBlueBits
>= 0);
534 assert(accumAlphaBits
>= 0);
536 vis
->rgbMode
= rgbFlag
;
537 vis
->doubleBufferMode
= dbFlag
;
538 vis
->stereoMode
= stereoFlag
;
540 vis
->redBits
= redBits
;
541 vis
->greenBits
= greenBits
;
542 vis
->blueBits
= blueBits
;
543 vis
->alphaBits
= alphaBits
;
544 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
546 vis
->indexBits
= indexBits
;
547 vis
->depthBits
= depthBits
;
548 vis
->stencilBits
= stencilBits
;
550 vis
->accumRedBits
= accumRedBits
;
551 vis
->accumGreenBits
= accumGreenBits
;
552 vis
->accumBlueBits
= accumBlueBits
;
553 vis
->accumAlphaBits
= accumAlphaBits
;
555 vis
->haveAccumBuffer
= accumRedBits
> 0;
556 vis
->haveDepthBuffer
= depthBits
> 0;
557 vis
->haveStencilBuffer
= stencilBits
> 0;
559 vis
->numAuxBuffers
= 0;
562 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
563 vis
->samples
= numSamples
;
570 * Destroy a visual and free its memory.
574 * Frees the visual structure.
577 _mesa_destroy_visual( GLvisual
*vis
)
585 /**********************************************************************/
586 /** \name Context allocation, initialization, destroying
588 * The purpose of the most initialization functions here is to provide the
589 * default state values according to the OpenGL specification.
591 /**********************************************************************/
595 * One-time initialization mutex lock.
597 * \sa Used by one_time_init().
599 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
602 * Calls all the various one-time-init functions in Mesa.
604 * While holding a global mutex lock, calls several initialization functions,
605 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
611 one_time_init( GLcontext
*ctx
)
613 static GLboolean alreadyCalled
= GL_FALSE
;
615 _glthread_LOCK_MUTEX(OneTimeLock
);
616 if (!alreadyCalled
) {
619 /* do some implementation tests */
620 assert( sizeof(GLbyte
) == 1 );
621 assert( sizeof(GLubyte
) == 1 );
622 assert( sizeof(GLshort
) == 2 );
623 assert( sizeof(GLushort
) == 2 );
624 assert( sizeof(GLint
) == 4 );
625 assert( sizeof(GLuint
) == 4 );
630 for (i
= 0; i
< 256; i
++) {
631 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
636 _mesa_init_sparc_glapi_relocs();
638 if (_mesa_getenv("MESA_DEBUG")) {
639 _glapi_noop_enable_warnings(GL_TRUE
);
640 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
643 _glapi_noop_enable_warnings(GL_FALSE
);
646 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
647 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
648 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
651 alreadyCalled
= GL_TRUE
;
653 _glthread_UNLOCK_MUTEX(OneTimeLock
);
658 * Allocate and initialize a shared context state structure.
659 * Initializes the display list, texture objects and vertex programs hash
660 * tables, allocates the texture objects. If it runs out of memory, frees
661 * everything already allocated before returning NULL.
663 * \return pointer to a gl_shared_state structure on success, or NULL on
667 alloc_shared_state( GLcontext
*ctx
)
669 struct gl_shared_state
*ss
= CALLOC_STRUCT(gl_shared_state
);
675 _glthread_INIT_MUTEX(ss
->Mutex
);
677 ss
->DisplayList
= _mesa_NewHashTable();
678 ss
->TexObjects
= _mesa_NewHashTable();
679 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
680 ss
->Programs
= _mesa_NewHashTable();
683 #if FEATURE_ARB_vertex_program
684 ss
->DefaultVertexProgram
= ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
685 if (!ss
->DefaultVertexProgram
)
688 #if FEATURE_ARB_fragment_program
689 ss
->DefaultFragmentProgram
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
690 if (!ss
->DefaultFragmentProgram
)
693 #if FEATURE_ATI_fragment_shader
694 ss
->ATIShaders
= _mesa_NewHashTable();
695 ss
->DefaultFragmentShader
= _mesa_new_ati_fragment_shader(ctx
, 0);
696 if (!ss
->DefaultFragmentShader
)
700 ss
->BufferObjects
= _mesa_NewHashTable();
702 ss
->GL2Objects
= _mesa_NewHashTable ();
704 ss
->Default1D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D
);
708 ss
->Default2D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D
);
712 ss
->Default3D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_3D
);
716 ss
->DefaultCubeMap
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_CUBE_MAP_ARB
);
717 if (!ss
->DefaultCubeMap
)
720 ss
->DefaultRect
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_RECTANGLE_NV
);
721 if (!ss
->DefaultRect
)
724 /* Effectively bind the default textures to all texture units */
725 ss
->Default1D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
726 ss
->Default2D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
727 ss
->Default3D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
728 ss
->DefaultCubeMap
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
729 ss
->DefaultRect
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
731 #if FEATURE_EXT_framebuffer_object
732 ss
->FrameBuffers
= _mesa_NewHashTable();
733 if (!ss
->FrameBuffers
)
735 ss
->RenderBuffers
= _mesa_NewHashTable();
736 if (!ss
->RenderBuffers
)
744 /* Ran out of memory at some point. Free everything and return NULL */
746 _mesa_DeleteHashTable(ss
->DisplayList
);
748 _mesa_DeleteHashTable(ss
->TexObjects
);
749 #if FEATURE_NV_vertex_program
751 _mesa_DeleteHashTable(ss
->Programs
);
753 #if FEATURE_ARB_vertex_program
754 if (ss
->DefaultVertexProgram
)
755 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
757 #if FEATURE_ARB_fragment_program
758 if (ss
->DefaultFragmentProgram
)
759 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
761 #if FEATURE_ATI_fragment_shader
762 if (ss
->DefaultFragmentShader
)
763 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
765 #if FEATURE_ARB_vertex_buffer_object
766 if (ss
->BufferObjects
)
767 _mesa_DeleteHashTable(ss
->BufferObjects
);
771 _mesa_DeleteHashTable (ss
->GL2Objects
);
773 #if FEATURE_EXT_framebuffer_object
774 if (ss
->FrameBuffers
)
775 _mesa_DeleteHashTable(ss
->FrameBuffers
);
776 if (ss
->RenderBuffers
)
777 _mesa_DeleteHashTable(ss
->RenderBuffers
);
781 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
783 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
785 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
786 if (ss
->DefaultCubeMap
)
787 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
789 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
796 * Deallocate a shared state context and all children structures.
798 * \param ctx GL context.
799 * \param ss shared state pointer.
801 * Frees the display lists, the texture objects (calling the driver texture
802 * deletion callback to free its private data) and the vertex programs, as well
803 * as their hash tables.
805 * \sa alloc_shared_state().
808 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
)
810 /* Free display lists */
812 GLuint list
= _mesa_HashFirstEntry(ss
->DisplayList
);
814 _mesa_destroy_list(ctx
, list
);
820 _mesa_DeleteHashTable(ss
->DisplayList
);
822 /* Free texture objects */
823 ASSERT(ctx
->Driver
.DeleteTexture
);
824 /* the default textures */
825 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
826 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
827 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
828 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
829 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
830 /* all other textures */
832 GLuint texName
= _mesa_HashFirstEntry(ss
->TexObjects
);
834 struct gl_texture_object
*texObj
= (struct gl_texture_object
*)
835 _mesa_HashLookup(ss
->TexObjects
, texName
);
837 (*ctx
->Driver
.DeleteTexture
)(ctx
, texObj
);
838 _mesa_HashRemove(ss
->TexObjects
, texName
);
844 _mesa_DeleteHashTable(ss
->TexObjects
);
846 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_NV_fragment_program)
847 /* Free vertex/fragment programs */
849 GLuint prog
= _mesa_HashFirstEntry(ss
->Programs
);
851 struct program
*p
= (struct program
*) _mesa_HashLookup(ss
->Programs
,
854 ctx
->Driver
.DeleteProgram(ctx
, p
);
855 _mesa_HashRemove(ss
->Programs
, prog
);
861 _mesa_DeleteHashTable(ss
->Programs
);
863 #if FEATURE_ARB_vertex_program
864 _mesa_delete_program(ctx
, ss
->DefaultVertexProgram
);
866 #if FEATURE_ARB_fragment_program
867 _mesa_delete_program(ctx
, ss
->DefaultFragmentProgram
);
870 #if FEATURE_ATI_fragment_shader
871 /* Free ATI fragment shaders */
873 GLuint prog
= _mesa_HashFirstEntry(ss
->ATIShaders
);
875 struct ati_fragment_shader
*s
= (struct ati_fragment_shader
*)
876 _mesa_HashLookup(ss
->ATIShaders
, prog
);
878 _mesa_delete_ati_fragment_shader(ctx
, s
);
879 _mesa_HashRemove(ss
->ATIShaders
, prog
);
885 _mesa_DeleteHashTable(ss
->ATIShaders
);
886 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
889 #if FEATURE_ARB_vertex_buffer_object
890 _mesa_DeleteHashTable(ss
->BufferObjects
);
893 #if FEATURE_ARB_shader_objects
894 _mesa_DeleteHashTable (ss
->GL2Objects
);
897 #if FEATURE_EXT_framebuffer_object
898 _mesa_DeleteHashTable(ss
->FrameBuffers
);
899 _mesa_DeleteHashTable(ss
->RenderBuffers
);
902 _glthread_DESTROY_MUTEX(ss
->Mutex
);
909 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
912 _mesa_init_current( GLcontext
*ctx
)
917 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
918 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
921 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 1.0 );
922 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
923 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
924 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
925 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
], 0.0, 0.0, 0.0, 0.0 );
927 ctx
->Current
.Index
= 1;
928 ctx
->Current
.EdgeFlag
= GL_TRUE
;
933 * Init vertex/fragment program native limits from logical limits.
936 init_natives(struct gl_program_constants
*prog
)
938 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
939 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
940 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
941 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
942 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
943 prog
->MaxNativeTemps
= prog
->MaxTemps
;
944 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
945 prog
->MaxNativeParameters
= prog
->MaxParameters
;
950 * Initialize fields of gl_constants (aka ctx->Const.*).
951 * Use defaults from config.h. The device drivers will often override
952 * some of these values (such as number of texture units).
955 _mesa_init_constants( GLcontext
*ctx
)
959 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
960 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
962 /* Constants, may be overriden (usually only reduced) by device drivers */
963 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
964 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
965 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
966 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
967 ctx
->Const
.MaxTextureUnits
= MAX_TEXTURE_UNITS
;
968 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
969 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
970 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
971 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
972 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
973 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
974 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
975 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
976 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
977 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
978 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
979 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
980 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
981 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
982 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
983 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
984 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
985 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
986 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
987 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
988 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
989 ctx
->Const
.MaxShininess
= 128.0;
990 ctx
->Const
.MaxSpotExponent
= 128.0;
991 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
992 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
993 #if FEATURE_ARB_vertex_program
994 ctx
->Const
.VertexProgram
.MaxInstructions
= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS
;
995 ctx
->Const
.VertexProgram
.MaxAluInstructions
= 0;
996 ctx
->Const
.VertexProgram
.MaxTexInstructions
= 0;
997 ctx
->Const
.VertexProgram
.MaxTexIndirections
= 0;
998 ctx
->Const
.VertexProgram
.MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
999 ctx
->Const
.VertexProgram
.MaxTemps
= MAX_NV_VERTEX_PROGRAM_TEMPS
;
1000 ctx
->Const
.VertexProgram
.MaxParameters
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
1001 ctx
->Const
.VertexProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
1002 ctx
->Const
.VertexProgram
.MaxEnvParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
1003 ctx
->Const
.VertexProgram
.MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
1004 init_natives(&ctx
->Const
.VertexProgram
);
1006 #if FEATURE_ARB_fragment_program
1007 ctx
->Const
.FragmentProgram
.MaxInstructions
= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS
;
1008 ctx
->Const
.FragmentProgram
.MaxAluInstructions
= MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS
;
1009 ctx
->Const
.FragmentProgram
.MaxTexInstructions
= MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS
;
1010 ctx
->Const
.FragmentProgram
.MaxTexIndirections
= MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS
;
1011 ctx
->Const
.FragmentProgram
.MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
1012 ctx
->Const
.FragmentProgram
.MaxTemps
= MAX_NV_FRAGMENT_PROGRAM_TEMPS
;
1013 ctx
->Const
.FragmentProgram
.MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
1014 ctx
->Const
.FragmentProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
1015 ctx
->Const
.FragmentProgram
.MaxEnvParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
1016 ctx
->Const
.FragmentProgram
.MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
1017 init_natives(&ctx
->Const
.FragmentProgram
);
1019 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
1020 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
1022 /* If we're running in the X server, do bounds checking to prevent
1023 * segfaults and server crashes!
1025 #if defined(XFree86LOADER) && defined(IN_MODULE)
1026 ctx
->Const
.CheckArrayBounds
= GL_TRUE
;
1028 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
1031 /* GL_ARB_draw_buffers */
1032 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
1034 /* GL_OES_read_format */
1035 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
1036 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
1038 #if FEATURE_EXT_framebuffer_object
1039 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
1040 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
1044 ASSERT(ctx
->Const
.MaxTextureUnits
== MAX2(ctx
->Const
.MaxTextureImageUnits
, ctx
->Const
.MaxTextureCoordUnits
));
1045 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
1046 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
1051 * Initialize the attribute groups in a GL context.
1053 * \param ctx GL context.
1055 * Initializes all the attributes, calling the respective <tt>init*</tt>
1056 * functions for the more complex data structures.
1059 init_attrib_groups( GLcontext
*ctx
)
1064 _mesa_init_constants( ctx
);
1067 _mesa_init_extensions( ctx
);
1069 /* Attribute Groups */
1070 _mesa_init_accum( ctx
);
1071 _mesa_init_attrib( ctx
);
1072 _mesa_init_buffer_objects( ctx
);
1073 _mesa_init_color( ctx
);
1074 _mesa_init_colortables( ctx
);
1075 _mesa_init_current( ctx
);
1076 _mesa_init_depth( ctx
);
1077 _mesa_init_debug( ctx
);
1078 _mesa_init_display_list( ctx
);
1079 _mesa_init_eval( ctx
);
1080 _mesa_init_feedback( ctx
);
1081 _mesa_init_fog( ctx
);
1082 _mesa_init_histogram( ctx
);
1083 _mesa_init_hint( ctx
);
1084 _mesa_init_line( ctx
);
1085 _mesa_init_lighting( ctx
);
1086 _mesa_init_matrix( ctx
);
1087 _mesa_init_multisample( ctx
);
1088 _mesa_init_pixel( ctx
);
1089 _mesa_init_point( ctx
);
1090 _mesa_init_polygon( ctx
);
1091 _mesa_init_program( ctx
);
1092 _mesa_init_query( ctx
);
1093 _mesa_init_rastpos( ctx
);
1094 _mesa_init_scissor( ctx
);
1095 _mesa_init_shaderobjects (ctx
);
1096 _mesa_init_stencil( ctx
);
1097 _mesa_init_transform( ctx
);
1098 _mesa_init_varray( ctx
);
1099 _mesa_init_viewport( ctx
);
1101 if (!_mesa_init_texture( ctx
))
1104 _mesa_init_texture_s3tc( ctx
);
1105 _mesa_init_texture_fxt1( ctx
);
1108 ctx
->NewState
= _NEW_ALL
;
1109 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
1117 * This is the default function we plug into all dispatch table slots
1118 * This helps prevents a segfault when someone calls a GL function without
1119 * first checking if the extension's supported.
1124 _mesa_problem(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
1130 * Allocate and initialize a new dispatch table.
1132 static struct _glapi_table
*
1133 alloc_dispatch_table(void)
1135 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1136 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1137 * Mesa we do this to accomodate different versions of libGL and various
1140 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
1141 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
1142 struct _glapi_table
*table
=
1143 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
1145 _glapi_proc
*entry
= (_glapi_proc
*) table
;
1147 for (i
= 0; i
< numEntries
; i
++) {
1148 entry
[i
] = (_glapi_proc
) generic_nop
;
1156 * Initialize a GLcontext struct (rendering context).
1158 * This includes allocating all the other structs and arrays which hang off of
1159 * the context by pointers.
1160 * Note that the driver needs to pass in its dd_function_table here since
1161 * we need to at least call driverFunctions->NewTextureObject to create the
1162 * default texture objects.
1164 * Called by _mesa_create_context().
1166 * Performs the imports and exports callback tables initialization, and
1167 * miscellaneous one-time initializations. If no shared context is supplied one
1168 * is allocated, and increase its reference count. Setups the GL API dispatch
1169 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1170 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1173 * \param ctx the context to initialize
1174 * \param visual describes the visual attributes for this context
1175 * \param share_list points to context to share textures, display lists,
1177 * \param driverFunctions table of device driver functions for this context
1179 * \param driverContext pointer to driver-specific context data
1182 _mesa_initialize_context( GLcontext
*ctx
,
1183 const GLvisual
*visual
,
1184 GLcontext
*share_list
,
1185 const struct dd_function_table
*driverFunctions
,
1186 void *driverContext
)
1188 ASSERT(driverContext
);
1189 assert(driverFunctions
->NewTextureObject
);
1190 assert(driverFunctions
->FreeTexImageData
);
1192 /* If the driver wants core Mesa to use special imports, it'll have to
1193 * override these defaults.
1195 _mesa_init_default_imports( &(ctx
->imports
), driverContext
);
1197 /* initialize the exports (Mesa functions called by the window system) */
1198 _mesa_init_default_exports( &(ctx
->exports
) );
1200 /* misc one-time initializations */
1203 ctx
->Visual
= *visual
;
1204 ctx
->DrawBuffer
= NULL
;
1205 ctx
->ReadBuffer
= NULL
;
1206 ctx
->WinSysDrawBuffer
= NULL
;
1207 ctx
->WinSysReadBuffer
= NULL
;
1209 /* Plug in driver functions and context pointer here.
1210 * This is important because when we call alloc_shared_state() below
1211 * we'll call ctx->Driver.NewTextureObject() to create the default
1214 ctx
->Driver
= *driverFunctions
;
1215 ctx
->DriverCtx
= driverContext
;
1218 /* share state with another context */
1219 ctx
->Shared
= share_list
->Shared
;
1222 /* allocate new, unshared state */
1223 if (!alloc_shared_state( ctx
)) {
1227 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1228 ctx
->Shared
->RefCount
++;
1229 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1231 if (!init_attrib_groups( ctx
)) {
1232 free_shared_state(ctx
, ctx
->Shared
);
1236 /* setup the API dispatch tables */
1237 ctx
->Exec
= alloc_dispatch_table();
1238 ctx
->Save
= alloc_dispatch_table();
1239 if (!ctx
->Exec
|| !ctx
->Save
) {
1240 free_shared_state(ctx
, ctx
->Shared
);
1242 _mesa_free(ctx
->Exec
);
1244 _mesa_init_exec_table(ctx
->Exec
);
1245 ctx
->CurrentDispatch
= ctx
->Exec
;
1247 _mesa_init_dlist_table(ctx
->Save
);
1248 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
1249 /* Neutral tnl module stuff */
1250 _mesa_init_exec_vtxfmt( ctx
);
1251 ctx
->TnlModule
.Current
= NULL
;
1252 ctx
->TnlModule
.SwapCount
= 0;
1255 ctx
->_MaintainTexEnvProgram
= (_mesa_getenv("MESA_TEX_PROG") != NULL
);
1256 ctx
->_UseTexEnvProgram
= ctx
->_MaintainTexEnvProgram
;
1258 ctx
->_MaintainTnlProgram
= (_mesa_getenv("MESA_TNL_PROG") != NULL
);
1259 if (ctx
->_MaintainTnlProgram
)
1260 ctx
->_MaintainTexEnvProgram
= 1; /* this is required... */
1262 ctx
->FirstTimeCurrent
= GL_TRUE
;
1269 * Allocate and initialize a GLcontext structure.
1270 * Note that the driver needs to pass in its dd_function_table here since
1271 * we need to at least call driverFunctions->NewTextureObject to initialize
1272 * the rendering context.
1274 * \param visual a GLvisual pointer (we copy the struct contents)
1275 * \param share_list another context to share display lists with or NULL
1276 * \param driverFunctions points to the dd_function_table into which the
1277 * driver has plugged in all its special functions.
1278 * \param driverCtx points to the device driver's private context state
1280 * \return pointer to a new __GLcontextRec or NULL if error.
1283 _mesa_create_context( const GLvisual
*visual
,
1284 GLcontext
*share_list
,
1285 const struct dd_function_table
*driverFunctions
,
1286 void *driverContext
)
1292 ASSERT(driverContext
);
1294 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
1298 if (_mesa_initialize_context(ctx
, visual
, share_list
,
1299 driverFunctions
, driverContext
)) {
1310 * Free the data associated with the given context.
1312 * But doesn't free the GLcontext struct itself.
1314 * \sa _mesa_initialize_context() and init_attrib_groups().
1317 _mesa_free_context_data( GLcontext
*ctx
)
1319 /* if we're destroying the current context, unbind it first */
1320 if (ctx
== _mesa_get_current_context()) {
1321 _mesa_make_current(NULL
, NULL
, NULL
);
1324 _mesa_free_lighting_data( ctx
);
1325 _mesa_free_eval_data( ctx
);
1326 _mesa_free_texture_data( ctx
);
1327 _mesa_free_matrix_data( ctx
);
1328 _mesa_free_viewport_data( ctx
);
1329 _mesa_free_colortables_data( ctx
);
1330 _mesa_free_program_data(ctx
);
1331 _mesa_free_query_data(ctx
);
1333 #if FEATURE_ARB_vertex_buffer_object
1334 _mesa_delete_buffer_object(ctx
, ctx
->Array
.NullBufferObj
);
1337 /* free dispatch tables */
1338 _mesa_free(ctx
->Exec
);
1339 _mesa_free(ctx
->Save
);
1341 /* Shared context state (display lists, textures, etc) */
1342 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1343 ctx
->Shared
->RefCount
--;
1344 assert(ctx
->Shared
->RefCount
>= 0);
1345 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1346 if (ctx
->Shared
->RefCount
== 0) {
1347 /* free shared state */
1348 free_shared_state( ctx
, ctx
->Shared
);
1351 if (ctx
->Extensions
.String
)
1352 FREE((void *) ctx
->Extensions
.String
);
1357 * Destroy a GLcontext structure.
1359 * \param ctx GL context.
1361 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1364 _mesa_destroy_context( GLcontext
*ctx
)
1367 _mesa_free_context_data(ctx
);
1368 FREE( (void *) ctx
);
1375 * Copy attribute groups from one context to another.
1377 * \param src source context
1378 * \param dst destination context
1379 * \param mask bitwise OR of GL_*_BIT flags
1381 * According to the bits specified in \p mask, copies the corresponding
1382 * attributes from \p src into \p dst. For many of the attributes a simple \c
1383 * memcpy is not enough due to the existence of internal pointers in their data
1387 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1389 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1391 dst
->Accum
= src
->Accum
;
1393 if (mask
& GL_COLOR_BUFFER_BIT
) {
1395 dst
->Color
= src
->Color
;
1397 if (mask
& GL_CURRENT_BIT
) {
1399 dst
->Current
= src
->Current
;
1401 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1403 dst
->Depth
= src
->Depth
;
1405 if (mask
& GL_ENABLE_BIT
) {
1408 if (mask
& GL_EVAL_BIT
) {
1410 dst
->Eval
= src
->Eval
;
1412 if (mask
& GL_FOG_BIT
) {
1414 dst
->Fog
= src
->Fog
;
1416 if (mask
& GL_HINT_BIT
) {
1418 dst
->Hint
= src
->Hint
;
1420 if (mask
& GL_LIGHTING_BIT
) {
1422 /* begin with memcpy */
1423 dst
->Light
= src
->Light
;
1424 /* fixup linked lists to prevent pointer insanity */
1425 make_empty_list( &(dst
->Light
.EnabledList
) );
1426 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1427 if (dst
->Light
.Light
[i
].Enabled
) {
1428 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1432 if (mask
& GL_LINE_BIT
) {
1434 dst
->Line
= src
->Line
;
1436 if (mask
& GL_LIST_BIT
) {
1438 dst
->List
= src
->List
;
1440 if (mask
& GL_PIXEL_MODE_BIT
) {
1442 dst
->Pixel
= src
->Pixel
;
1444 if (mask
& GL_POINT_BIT
) {
1446 dst
->Point
= src
->Point
;
1448 if (mask
& GL_POLYGON_BIT
) {
1450 dst
->Polygon
= src
->Polygon
;
1452 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1453 /* Use loop instead of MEMCPY due to problem with Portland Group's
1454 * C compiler. Reported by John Stone.
1457 for (i
= 0; i
< 32; i
++) {
1458 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1461 if (mask
& GL_SCISSOR_BIT
) {
1463 dst
->Scissor
= src
->Scissor
;
1465 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1467 dst
->Stencil
= src
->Stencil
;
1469 if (mask
& GL_TEXTURE_BIT
) {
1470 /* Cannot memcpy because of pointers */
1471 _mesa_copy_texture_state(src
, dst
);
1473 if (mask
& GL_TRANSFORM_BIT
) {
1475 dst
->Transform
= src
->Transform
;
1477 if (mask
& GL_VIEWPORT_BIT
) {
1478 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1479 dst
->Viewport
.X
= src
->Viewport
.X
;
1480 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1481 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1482 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1483 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1484 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1485 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1488 /* XXX FIXME: Call callbacks?
1490 dst
->NewState
= _NEW_ALL
;
1496 * Check if the given context can render into the given framebuffer
1497 * by checking visual attributes.
1499 * XXX this may go away someday because we're moving toward more freedom
1500 * in binding contexts to drawables with different visual attributes.
1501 * The GL_EXT_f_b_o extension is prompting some of that.
1503 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1506 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1508 const GLvisual
*ctxvis
= &ctx
->Visual
;
1509 const GLvisual
*bufvis
= &buffer
->Visual
;
1511 if (ctxvis
== bufvis
)
1514 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1517 /* disabling this fixes the fgl_glxgears pbuffer demo */
1518 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1521 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1523 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1525 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1527 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1529 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1531 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1533 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1535 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1537 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1545 * Do one-time initialization for the given framebuffer. Specifically,
1546 * ask the driver for the window's current size and update the framebuffer
1548 * Really, the device driver should totally take care of this.
1551 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1553 GLuint width
, height
;
1554 ASSERT(ctx
->Driver
.GetBufferSize
);
1555 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1556 if (ctx
->Driver
.ResizeBuffers
)
1557 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1558 fb
->Initialized
= GL_TRUE
;
1563 * Bind the given context to the given drawBuffer and readBuffer and
1564 * make it the current context for the calling thread.
1565 * We'll render into the drawBuffer and read pixels from the
1566 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1568 * We check that the context's and framebuffer's visuals are compatible
1569 * and return immediately if they're not.
1571 * \param newCtx the new GL context. If NULL then there will be no current GL
1573 * \param drawBuffer the drawing framebuffer
1574 * \param readBuffer the reading framebuffer
1577 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1578 GLframebuffer
*readBuffer
)
1580 if (MESA_VERBOSE
& VERBOSE_API
)
1581 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1583 /* Check that the context's and framebuffer's visuals are compatible.
1585 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1586 if (!check_compatible(newCtx
, drawBuffer
)) {
1587 _mesa_warning(newCtx
,
1588 "MakeCurrent: incompatible visuals for context and drawbuffer");
1592 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1593 if (!check_compatible(newCtx
, readBuffer
)) {
1594 _mesa_warning(newCtx
,
1595 "MakeCurrent: incompatible visuals for context and readbuffer");
1600 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1601 _glapi_set_context((void *) newCtx
);
1602 ASSERT(_mesa_get_current_context() == newCtx
);
1605 _glapi_set_dispatch(NULL
); /* none current */
1608 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1610 if (drawBuffer
&& readBuffer
) {
1611 /* TODO: check if newCtx and buffer's visual match??? */
1613 ASSERT(drawBuffer
->Name
== 0);
1614 ASSERT(readBuffer
->Name
== 0);
1615 newCtx
->WinSysDrawBuffer
= drawBuffer
;
1616 newCtx
->WinSysReadBuffer
= readBuffer
;
1619 * Only set the context's Draw/ReadBuffer fields if they're NULL
1620 * or not bound to a user-created FBO.
1622 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1623 newCtx
->DrawBuffer
= drawBuffer
;
1625 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1626 newCtx
->ReadBuffer
= readBuffer
;
1629 newCtx
->NewState
|= _NEW_BUFFERS
;
1632 if (!drawBuffer
->Initialized
) {
1633 initialize_framebuffer_size(newCtx
, drawBuffer
);
1635 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1636 initialize_framebuffer_size(newCtx
, readBuffer
);
1639 if (newCtx
->FirstTimeCurrent
) {
1640 /* set initial viewport and scissor size now */
1641 _mesa_set_viewport(newCtx
, 0, 0,
1642 drawBuffer
->Width
, drawBuffer
->Height
);
1643 _mesa_set_scissor(newCtx
, 0, 0,
1644 drawBuffer
->Width
, drawBuffer
->Height
);
1648 /* We can use this to help debug user's problems. Tell them to set
1649 * the MESA_INFO env variable before running their app. Then the
1650 * first time each context is made current we'll print some useful
1653 if (newCtx
->FirstTimeCurrent
) {
1654 if (_mesa_getenv("MESA_INFO")) {
1657 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1664 * Make context 'ctx' share the display lists, textures and programs
1665 * that are associated with 'ctxToShare'.
1666 * Any display lists, textures or programs associated with 'ctx' will
1667 * be deleted if nobody else is sharing them.
1670 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1672 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1673 ctx
->Shared
->RefCount
--;
1674 if (ctx
->Shared
->RefCount
== 0) {
1675 free_shared_state(ctx
, ctx
->Shared
);
1677 ctx
->Shared
= ctxToShare
->Shared
;
1678 ctx
->Shared
->RefCount
++;
1689 * Get current context for the calling thread.
1691 * \return pointer to the current GL context.
1693 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1694 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in context.h.
1697 _mesa_get_current_context( void )
1699 return (GLcontext
*) _glapi_get_context();
1703 * Get context's current API dispatch table.
1705 * It'll either be the immediate-mode execute dispatcher or the display list
1706 * compile dispatcher.
1708 * \param ctx GL context.
1710 * \return pointer to dispatch_table.
1712 * Simply returns __GLcontextRec::CurrentDispatch.
1714 struct _glapi_table
*
1715 _mesa_get_dispatch(GLcontext
*ctx
)
1717 return ctx
->CurrentDispatch
;
1723 /**********************************************************************/
1724 /** \name Miscellaneous functions */
1725 /**********************************************************************/
1731 * \param ctx GL context.
1732 * \param error error code.
1734 * Records the given error code and call the driver's dd_function_table::Error
1735 * function if defined.
1738 * This is called via _mesa_error().
1741 _mesa_record_error( GLcontext
*ctx
, GLenum error
)
1746 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1747 ctx
->ErrorValue
= error
;
1750 /* Call device driver's error handler, if any. This is used on the Mac. */
1751 if (ctx
->Driver
.Error
) {
1752 (*ctx
->Driver
.Error
)( ctx
);
1757 * Execute glFinish().
1759 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1760 * dd_function_table::Finish driver callback, if not NULL.
1763 _mesa_Finish( void )
1765 GET_CURRENT_CONTEXT(ctx
);
1766 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1767 if (ctx
->Driver
.Finish
) {
1768 (*ctx
->Driver
.Finish
)( ctx
);
1773 * Execute glFlush().
1775 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1776 * dd_function_table::Flush driver callback, if not NULL.
1781 GET_CURRENT_CONTEXT(ctx
);
1782 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1783 if (ctx
->Driver
.Flush
) {
1784 (*ctx
->Driver
.Flush
)( ctx
);