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.
86 #include "bufferobj.h"
94 #include "extensions.h"
100 #include "glapioffsets.h"
101 #include "histogram.h"
104 #include "atifragshader.h"
113 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
117 #include "simple_list.h"
120 #include "texcompress.h"
121 #include "teximage.h"
123 #include "texstate.h"
129 #include "math/m_translate.h"
130 #include "math/m_matrix.h"
131 #include "math/m_xform.h"
132 #include "math/mathmod.h"
134 #include "shaderobjects.h"
137 #include "sparc/sparc.h"
141 int MESA_VERBOSE
= 0;
144 #ifndef MESA_DEBUG_FLAGS
145 int MESA_DEBUG_FLAGS
= 0;
149 /* ubyte -> float conversion */
150 GLfloat _mesa_ubyte_to_float_color_tab
[256];
153 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
);
156 /**********************************************************************/
157 /** \name OpenGL SI-style interface (new in Mesa 3.5)
160 * \note Most of these functions are never called in the Mesa subset.
166 * Destroy context callback.
169 * \return GL_TRUE on success, or GL_FALSE on failure.
172 * Called by window system/device driver (via __GLexports::destroyCurrent) when
173 * the rendering context is to be destroyed.
176 * Frees the context data and the context structure.
179 _mesa_destroyContext(__GLcontext
*gc
)
182 _mesa_free_context_data(gc
);
189 * Unbind context callback.
192 * \return GL_TRUE on success, or GL_FALSE on failure.
195 * Called by window system/device driver (via __GLexports::loseCurrent)
196 * when the rendering context is made non-current.
202 _mesa_loseCurrent(__GLcontext
*gc
)
204 /* XXX unbind context from thread */
210 * Bind context callback.
213 * \return GL_TRUE on success, or GL_FALSE on failure.
216 * Called by window system/device driver (via __GLexports::makeCurrent)
217 * when the rendering context is made current.
223 _mesa_makeCurrent(__GLcontext
*gc
)
225 /* XXX bind context to thread */
231 * Share context callback.
234 * \param gcShare shared context.
235 * \return GL_TRUE on success, or GL_FALSE on failure.
238 * Called by window system/device driver (via __GLexports::shareContext)
241 * Update the shared context reference count, gl_shared_state::RefCount.
244 _mesa_shareContext(__GLcontext
*gc
, __GLcontext
*gcShare
)
246 if (gc
&& gcShare
&& gc
->Shared
&& gcShare
->Shared
) {
247 gc
->Shared
->RefCount
--;
248 if (gc
->Shared
->RefCount
== 0) {
249 free_shared_state(gc
, gc
->Shared
);
251 gc
->Shared
= gcShare
->Shared
;
252 gc
->Shared
->RefCount
++;
263 * Copy context callback.
266 _mesa_copyContext(__GLcontext
*dst
, const __GLcontext
*src
, GLuint mask
)
269 _mesa_copy_context( src
, dst
, mask
);
280 _mesa_forceCurrent(__GLcontext
*gc
)
287 * Windows/buffer resizing notification callback.
289 * \param gc GL context.
290 * \return GL_TRUE on success, or GL_FALSE on failure.
293 _mesa_notifyResize(__GLcontext
*gc
)
296 GLuint width
, height
;
297 __GLdrawablePrivate
*d
= gc
->imports
.getDrawablePrivate(gc
);
298 if (!d
|| !d
->getDrawableSize
)
300 d
->getDrawableSize( d
, &x
, &y
, &width
, &height
);
301 /* update viewport, resize software buffers, etc. */
306 * Window/buffer destruction notification callback.
308 * \param gc GL context.
310 * Called when the context's window/buffer is going to be destroyed.
315 _mesa_notifyDestroy(__GLcontext
*gc
)
317 /* Unbind from it. */
322 * Swap buffers notification callback.
324 * \param gc GL context.
326 * Called by window system just before swapping buffers.
327 * We have to finish any pending rendering.
330 _mesa_notifySwapBuffers(__GLcontext
*gc
)
332 FLUSH_VERTICES( gc
, 0 );
336 struct __GLdispatchStateRec
*
337 _mesa_dispatchExec(__GLcontext
*gc
)
345 _mesa_beginDispatchOverride(__GLcontext
*gc
)
352 _mesa_endDispatchOverride(__GLcontext
*gc
)
361 * The window system will call these functions when it needs Mesa to do
364 * \note Device drivers should override these functions! For example,
365 * the Xlib driver should plug in the XMesa*-style functions into this
366 * structure. The XMesa-style functions should then call the _mesa_*
367 * version of these functions. This is an approximation to OO design
368 * (inheritance and virtual functions).
377 _mesa_init_default_exports(__GLexports
*exports
)
380 exports
->destroyContext
= _mesa_destroyContext
;
381 exports
->loseCurrent
= _mesa_loseCurrent
;
382 exports
->makeCurrent
= _mesa_makeCurrent
;
383 exports
->shareContext
= _mesa_shareContext
;
384 exports
->copyContext
= _mesa_copyContext
;
385 exports
->forceCurrent
= _mesa_forceCurrent
;
386 exports
->notifyResize
= _mesa_notifyResize
;
387 exports
->notifyDestroy
= _mesa_notifyDestroy
;
388 exports
->notifySwapBuffers
= _mesa_notifySwapBuffers
;
389 exports
->dispatchExec
= _mesa_dispatchExec
;
390 exports
->beginDispatchOverride
= _mesa_beginDispatchOverride
;
391 exports
->endDispatchOverride
= _mesa_endDispatchOverride
;
398 * Exported OpenGL SI interface.
401 __glCoreCreateContext(__GLimports
*imports
, __GLcontextModes
*modes
)
405 ctx
= (GLcontext
*) (*imports
->calloc
)(NULL
, 1, sizeof(GLcontext
));
410 /* XXX doesn't work at this time */
411 _mesa_initialize_context(ctx
, modes
, NULL
, NULL
, NULL
);
412 ctx
->imports
= *imports
;
418 * Exported OpenGL SI interface.
421 __glCoreNopDispatch(void)
425 __gl_dispatch
= __glNopDispatchState
;
428 _glapi_set_dispatch(NULL
);
435 /**********************************************************************/
436 /** \name GL Visual allocation/destruction */
437 /**********************************************************************/
441 * Allocates a GLvisual structure and initializes it via
442 * _mesa_initialize_visual().
444 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
445 * \param dbFlag double buffering
446 * \param stereoFlag stereo buffer
447 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
448 * is acceptable but the actual depth type will be GLushort or GLuint as
450 * \param stencilBits requested minimum bits per stencil buffer value
451 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
452 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
453 * \param redBits number of bits per color component in frame buffer for RGB(A)
454 * mode. We always use 8 in core Mesa though.
455 * \param greenBits same as above.
456 * \param blueBits same as above.
457 * \param alphaBits same as above.
458 * \param numSamples not really used.
460 * \return pointer to new GLvisual or NULL if requested parameters can't be
463 * \note Need to add params for level and numAuxBuffers (at least)
466 _mesa_create_visual( GLboolean rgbFlag
,
468 GLboolean stereoFlag
,
477 GLint accumGreenBits
,
479 GLint accumAlphaBits
,
482 GLvisual
*vis
= (GLvisual
*) _mesa_calloc(sizeof(GLvisual
));
484 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
485 redBits
, greenBits
, blueBits
, alphaBits
,
486 indexBits
, depthBits
, stencilBits
,
487 accumRedBits
, accumGreenBits
,
488 accumBlueBits
, accumAlphaBits
,
498 * Makes some sanity checks and fills in the fields of the
499 * GLvisual object with the given parameters. If the caller needs
500 * to set additional fields, he should just probably init the whole GLvisual
502 * \return GL_TRUE on success, or GL_FALSE on failure.
504 * \sa _mesa_create_visual() above for the parameter description.
507 _mesa_initialize_visual( GLvisual
*vis
,
510 GLboolean stereoFlag
,
519 GLint accumGreenBits
,
521 GLint accumAlphaBits
,
526 if (depthBits
< 0 || depthBits
> 32) {
529 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
532 assert(accumRedBits
>= 0);
533 assert(accumGreenBits
>= 0);
534 assert(accumBlueBits
>= 0);
535 assert(accumAlphaBits
>= 0);
537 vis
->rgbMode
= rgbFlag
;
538 vis
->doubleBufferMode
= dbFlag
;
539 vis
->stereoMode
= stereoFlag
;
541 vis
->redBits
= redBits
;
542 vis
->greenBits
= greenBits
;
543 vis
->blueBits
= blueBits
;
544 vis
->alphaBits
= alphaBits
;
545 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
547 vis
->indexBits
= indexBits
;
548 vis
->depthBits
= depthBits
;
549 vis
->stencilBits
= stencilBits
;
551 vis
->accumRedBits
= accumRedBits
;
552 vis
->accumGreenBits
= accumGreenBits
;
553 vis
->accumBlueBits
= accumBlueBits
;
554 vis
->accumAlphaBits
= accumAlphaBits
;
556 vis
->haveAccumBuffer
= accumRedBits
> 0;
557 vis
->haveDepthBuffer
= depthBits
> 0;
558 vis
->haveStencilBuffer
= stencilBits
> 0;
560 vis
->numAuxBuffers
= 0;
563 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
564 vis
->samples
= numSamples
;
571 * Destroy a visual and free its memory.
575 * Frees the visual structure.
578 _mesa_destroy_visual( GLvisual
*vis
)
586 /**********************************************************************/
587 /** \name Context allocation, initialization, destroying
589 * The purpose of the most initialization functions here is to provide the
590 * default state values according to the OpenGL specification.
592 /**********************************************************************/
596 * One-time initialization mutex lock.
598 * \sa Used by one_time_init().
600 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
603 * Calls all the various one-time-init functions in Mesa.
605 * While holding a global mutex lock, calls several initialization functions,
606 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
612 one_time_init( GLcontext
*ctx
)
614 static GLboolean alreadyCalled
= GL_FALSE
;
616 _glthread_LOCK_MUTEX(OneTimeLock
);
617 if (!alreadyCalled
) {
620 /* do some implementation tests */
621 assert( sizeof(GLbyte
) == 1 );
622 assert( sizeof(GLubyte
) == 1 );
623 assert( sizeof(GLshort
) == 2 );
624 assert( sizeof(GLushort
) == 2 );
625 assert( sizeof(GLint
) == 4 );
626 assert( sizeof(GLuint
) == 4 );
631 for (i
= 0; i
< 256; i
++) {
632 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
637 _mesa_init_sparc_glapi_relocs();
639 if (_mesa_getenv("MESA_DEBUG")) {
640 _glapi_noop_enable_warnings(GL_TRUE
);
641 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
644 _glapi_noop_enable_warnings(GL_FALSE
);
647 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
648 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
649 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
652 alreadyCalled
= GL_TRUE
;
654 _glthread_UNLOCK_MUTEX(OneTimeLock
);
659 * Allocate and initialize a shared context state structure.
660 * Initializes the display list, texture objects and vertex programs hash
661 * tables, allocates the texture objects. If it runs out of memory, frees
662 * everything already allocated before returning NULL.
664 * \return pointer to a gl_shared_state structure on success, or NULL on
668 alloc_shared_state( GLcontext
*ctx
)
670 struct gl_shared_state
*ss
= CALLOC_STRUCT(gl_shared_state
);
676 _glthread_INIT_MUTEX(ss
->Mutex
);
678 ss
->DisplayList
= _mesa_NewHashTable();
679 ss
->TexObjects
= _mesa_NewHashTable();
680 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
681 ss
->Programs
= _mesa_NewHashTable();
684 #if FEATURE_ARB_vertex_program
685 ss
->DefaultVertexProgram
= ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
686 if (!ss
->DefaultVertexProgram
)
689 #if FEATURE_ARB_fragment_program
690 ss
->DefaultFragmentProgram
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
691 if (!ss
->DefaultFragmentProgram
)
694 #if FEATURE_ATI_fragment_shader
695 ss
->ATIShaders
= _mesa_NewHashTable();
696 ss
->DefaultFragmentShader
= _mesa_new_ati_fragment_shader(ctx
, 0);
697 if (!ss
->DefaultFragmentShader
)
701 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
702 ss
->BufferObjects
= _mesa_NewHashTable();
705 ss
->ArrayObjects
= _mesa_NewHashTable();
707 #if FEATURE_ARB_shader_objects
708 ss
->GL2Objects
= _mesa_NewHashTable ();
711 ss
->Default1D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D
);
715 ss
->Default2D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D
);
719 ss
->Default3D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_3D
);
723 ss
->DefaultCubeMap
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_CUBE_MAP_ARB
);
724 if (!ss
->DefaultCubeMap
)
727 ss
->DefaultRect
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_RECTANGLE_NV
);
728 if (!ss
->DefaultRect
)
731 /* Effectively bind the default textures to all texture units */
732 ss
->Default1D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
733 ss
->Default2D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
734 ss
->Default3D
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
735 ss
->DefaultCubeMap
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
736 ss
->DefaultRect
->RefCount
+= MAX_TEXTURE_IMAGE_UNITS
;
738 _glthread_INIT_MUTEX(ss
->TexMutex
);
739 ss
->TextureStateStamp
= 0;
742 #if FEATURE_EXT_framebuffer_object
743 ss
->FrameBuffers
= _mesa_NewHashTable();
744 if (!ss
->FrameBuffers
)
746 ss
->RenderBuffers
= _mesa_NewHashTable();
747 if (!ss
->RenderBuffers
)
755 /* Ran out of memory at some point. Free everything and return NULL */
757 _mesa_DeleteHashTable(ss
->DisplayList
);
759 _mesa_DeleteHashTable(ss
->TexObjects
);
760 #if FEATURE_NV_vertex_program
762 _mesa_DeleteHashTable(ss
->Programs
);
764 #if FEATURE_ARB_vertex_program
765 if (ss
->DefaultVertexProgram
)
766 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
768 #if FEATURE_ARB_fragment_program
769 if (ss
->DefaultFragmentProgram
)
770 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
772 #if FEATURE_ATI_fragment_shader
773 if (ss
->DefaultFragmentShader
)
774 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
776 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
777 if (ss
->BufferObjects
)
778 _mesa_DeleteHashTable(ss
->BufferObjects
);
781 if (ss
->ArrayObjects
)
782 _mesa_DeleteHashTable (ss
->ArrayObjects
);
784 #if FEATURE_ARB_shader_objects
786 _mesa_DeleteHashTable (ss
->GL2Objects
);
789 #if FEATURE_EXT_framebuffer_object
790 if (ss
->FrameBuffers
)
791 _mesa_DeleteHashTable(ss
->FrameBuffers
);
792 if (ss
->RenderBuffers
)
793 _mesa_DeleteHashTable(ss
->RenderBuffers
);
797 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
799 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
801 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
802 if (ss
->DefaultCubeMap
)
803 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
805 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
813 * Callback for deleting a display list. Called by _mesa_HashDeleteAll().
816 delete_displaylist_cb(GLuint id
, void *data
, void *userData
)
818 struct mesa_display_list
*list
= (struct mesa_display_list
*) data
;
819 GLcontext
*ctx
= (GLcontext
*) userData
;
820 _mesa_delete_list(ctx
, list
);
824 * Callback for deleting a texture object. Called by _mesa_HashDeleteAll().
827 delete_texture_cb(GLuint id
, void *data
, void *userData
)
829 struct gl_texture_object
*texObj
= (struct gl_texture_object
*) data
;
830 GLcontext
*ctx
= (GLcontext
*) userData
;
831 ctx
->Driver
.DeleteTexture(ctx
, texObj
);
835 * Callback for deleting a program object. Called by _mesa_HashDeleteAll().
838 delete_program_cb(GLuint id
, void *data
, void *userData
)
840 struct gl_program
*prog
= (struct gl_program
*) data
;
841 GLcontext
*ctx
= (GLcontext
*) userData
;
842 ctx
->Driver
.DeleteProgram(ctx
, prog
);
846 * Callback for deleting an ATI fragment shader object.
847 * Called by _mesa_HashDeleteAll().
850 delete_fragshader_cb(GLuint id
, void *data
, void *userData
)
852 struct ati_fragment_shader
*shader
= (struct ati_fragment_shader
*) data
;
853 GLcontext
*ctx
= (GLcontext
*) userData
;
854 _mesa_delete_ati_fragment_shader(ctx
, shader
);
858 * Callback for deleting a buffer object. Called by _mesa_HashDeleteAll().
861 delete_bufferobj_cb(GLuint id
, void *data
, void *userData
)
863 struct gl_buffer_object
*bufObj
= (struct gl_buffer_object
*) data
;
864 GLcontext
*ctx
= (GLcontext
*) userData
;
865 ctx
->Driver
.DeleteBuffer(ctx
, bufObj
);
869 * Callback for deleting an array object. Called by _mesa_HashDeleteAll().
872 delete_arrayobj_cb(GLuint id
, void *data
, void *userData
)
874 struct gl_array_object
*arrayObj
= (struct gl_array_object
*) data
;
875 GLcontext
*ctx
= (GLcontext
*) userData
;
876 _mesa_delete_array_object(ctx
, arrayObj
);
880 * Callback for deleting an shader object. Called by _mesa_HashDeleteAll().
883 delete_shaderobj_cb(GLuint id
, void *data
, void *userData
)
885 /* XXX probably need to fix this */
891 * Deallocate a shared state object and all children structures.
893 * \param ctx GL context.
894 * \param ss shared state pointer.
896 * Frees the display lists, the texture objects (calling the driver texture
897 * deletion callback to free its private data) and the vertex programs, as well
898 * as their hash tables.
900 * \sa alloc_shared_state().
903 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
)
908 _mesa_HashDeleteAll(ss
->DisplayList
, delete_displaylist_cb
, ctx
);
909 _mesa_DeleteHashTable(ss
->DisplayList
);
912 * Free texture objects
914 ASSERT(ctx
->Driver
.DeleteTexture
);
915 /* the default textures */
916 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default1D
);
917 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default2D
);
918 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default3D
);
919 ctx
->Driver
.DeleteTexture(ctx
, ss
->DefaultCubeMap
);
920 ctx
->Driver
.DeleteTexture(ctx
, ss
->DefaultRect
);
921 /* all other textures */
922 _mesa_HashDeleteAll(ss
->TexObjects
, delete_texture_cb
, ctx
);
923 _mesa_DeleteHashTable(ss
->TexObjects
);
925 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_NV_fragment_program)
926 _mesa_HashDeleteAll(ss
->Programs
, delete_program_cb
, ctx
);
927 _mesa_DeleteHashTable(ss
->Programs
);
929 #if FEATURE_ARB_vertex_program
930 _mesa_delete_program(ctx
, ss
->DefaultVertexProgram
);
932 #if FEATURE_ARB_fragment_program
933 _mesa_delete_program(ctx
, ss
->DefaultFragmentProgram
);
936 #if FEATURE_ATI_fragment_shader
937 _mesa_HashDeleteAll(ss
->ATIShaders
, delete_fragshader_cb
, ctx
);
938 _mesa_DeleteHashTable(ss
->ATIShaders
);
939 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
942 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
943 _mesa_HashDeleteAll(ss
->BufferObjects
, delete_bufferobj_cb
, ctx
);
944 _mesa_DeleteHashTable(ss
->BufferObjects
);
947 _mesa_HashDeleteAll(ss
->ArrayObjects
, delete_arrayobj_cb
, ctx
);
948 _mesa_DeleteHashTable(ss
->ArrayObjects
);
950 #if FEATURE_ARB_shader_objects
951 _mesa_HashDeleteAll(ss
->GL2Objects
, delete_shaderobj_cb
, ctx
);
952 _mesa_DeleteHashTable(ss
->GL2Objects
);
955 #if FEATURE_EXT_framebuffer_object
956 _mesa_DeleteHashTable(ss
->FrameBuffers
);
957 _mesa_DeleteHashTable(ss
->RenderBuffers
);
960 _glthread_DESTROY_MUTEX(ss
->Mutex
);
967 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
970 _mesa_init_current( GLcontext
*ctx
)
974 /* Init all to (0,0,0,1) */
975 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
976 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
979 /* redo special cases: */
980 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 1.0 );
981 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
982 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
983 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
984 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
], 0.0, 0.0, 0.0, 0.0 );
985 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
][0] = 1.0;
986 ctx
->Current
.EdgeFlag
= GL_TRUE
;
991 * Init vertex/fragment program native limits from logical limits.
994 init_natives(struct gl_program_constants
*prog
)
996 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
997 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
998 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
999 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
1000 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
1001 prog
->MaxNativeTemps
= prog
->MaxTemps
;
1002 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
1003 prog
->MaxNativeParameters
= prog
->MaxParameters
;
1008 * Initialize fields of gl_constants (aka ctx->Const.*).
1009 * Use defaults from config.h. The device drivers will often override
1010 * some of these values (such as number of texture units).
1013 _mesa_init_constants( GLcontext
*ctx
)
1017 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
1018 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
1020 assert(MAX_TEXTURE_UNITS
>= MAX_TEXTURE_COORD_UNITS
);
1021 assert(MAX_TEXTURE_UNITS
>= MAX_TEXTURE_IMAGE_UNITS
);
1023 /* Constants, may be overriden (usually only reduced) by device drivers */
1024 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
1025 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
1026 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
1027 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
1028 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
1029 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
1030 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
1031 ctx
->Const
.MaxTextureImageUnits
);
1032 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
1033 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
1034 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
1035 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
1036 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
1037 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
1038 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
1039 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
1040 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
1041 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
1042 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
1043 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
1044 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
1045 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
1046 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
1047 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
1048 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
1049 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
1050 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
1051 ctx
->Const
.MaxShininess
= 128.0;
1052 ctx
->Const
.MaxSpotExponent
= 128.0;
1053 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
1054 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
1055 #if FEATURE_ARB_vertex_program
1056 ctx
->Const
.VertexProgram
.MaxInstructions
= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS
;
1057 ctx
->Const
.VertexProgram
.MaxAluInstructions
= 0;
1058 ctx
->Const
.VertexProgram
.MaxTexInstructions
= 0;
1059 ctx
->Const
.VertexProgram
.MaxTexIndirections
= 0;
1060 ctx
->Const
.VertexProgram
.MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
1061 ctx
->Const
.VertexProgram
.MaxTemps
= MAX_NV_VERTEX_PROGRAM_TEMPS
;
1062 ctx
->Const
.VertexProgram
.MaxParameters
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
1063 ctx
->Const
.VertexProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
1064 ctx
->Const
.VertexProgram
.MaxEnvParams
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
1065 ctx
->Const
.VertexProgram
.MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
1066 ctx
->Const
.VertexProgram
.MaxUniformComponents
= MAX_VERTEX_UNIFORM_COMPONENTS
;
1067 init_natives(&ctx
->Const
.VertexProgram
);
1069 #if FEATURE_ARB_fragment_program
1070 ctx
->Const
.FragmentProgram
.MaxInstructions
= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS
;
1071 ctx
->Const
.FragmentProgram
.MaxAluInstructions
= MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS
;
1072 ctx
->Const
.FragmentProgram
.MaxTexInstructions
= MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS
;
1073 ctx
->Const
.FragmentProgram
.MaxTexIndirections
= MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS
;
1074 ctx
->Const
.FragmentProgram
.MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
1075 ctx
->Const
.FragmentProgram
.MaxTemps
= MAX_NV_FRAGMENT_PROGRAM_TEMPS
;
1076 ctx
->Const
.FragmentProgram
.MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
1077 ctx
->Const
.FragmentProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
1078 ctx
->Const
.FragmentProgram
.MaxEnvParams
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
1079 ctx
->Const
.FragmentProgram
.MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
1080 ctx
->Const
.FragmentProgram
.MaxUniformComponents
= MAX_FRAGMENT_UNIFORM_COMPONENTS
;
1081 init_natives(&ctx
->Const
.FragmentProgram
);
1083 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
1084 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
1086 /* If we're running in the X server, do bounds checking to prevent
1087 * segfaults and server crashes!
1089 #if defined(XFree86Server)
1090 ctx
->Const
.CheckArrayBounds
= GL_TRUE
;
1092 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
1095 /* GL_ARB_draw_buffers */
1096 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
1098 /* GL_OES_read_format */
1099 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
1100 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
1102 #if FEATURE_EXT_framebuffer_object
1103 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
1104 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
1107 #if FEATURE_ARB_vertex_shader
1108 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
1109 ctx
->Const
.MaxVaryingFloats
= MAX_VARYING_FLOATS
;
1113 ASSERT(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
1114 ctx
->Const
.MaxTextureCoordUnits
));
1115 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
1116 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
1121 * Do some sanity checks on the limits/constants for the given context.
1122 * Only called the first time a context is bound.
1125 check_context_limits(GLcontext
*ctx
)
1127 /* Many context limits/constants are limited by the size of
1130 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
1131 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
1132 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
1133 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
1135 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
1136 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
1138 /* make sure largest texture image is <= MAX_WIDTH in size */
1139 assert((1 << (ctx
->Const
.MaxTextureLevels
-1 )) <= MAX_WIDTH
);
1140 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
-1 )) <= MAX_WIDTH
);
1141 assert((1 << (ctx
->Const
.Max3DTextureLevels
-1 )) <= MAX_WIDTH
);
1143 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
1145 /* XXX probably add more tests */
1150 * Initialize the attribute groups in a GL context.
1152 * \param ctx GL context.
1154 * Initializes all the attributes, calling the respective <tt>init*</tt>
1155 * functions for the more complex data structures.
1158 init_attrib_groups( GLcontext
*ctx
)
1163 _mesa_init_constants( ctx
);
1166 _mesa_init_extensions( ctx
);
1168 /* Attribute Groups */
1169 _mesa_init_accum( ctx
);
1170 _mesa_init_attrib( ctx
);
1171 _mesa_init_buffer_objects( ctx
);
1172 _mesa_init_color( ctx
);
1173 _mesa_init_colortables( ctx
);
1174 _mesa_init_current( ctx
);
1175 _mesa_init_depth( ctx
);
1176 _mesa_init_debug( ctx
);
1177 _mesa_init_display_list( ctx
);
1178 _mesa_init_eval( ctx
);
1179 _mesa_init_feedback( ctx
);
1180 _mesa_init_fog( ctx
);
1181 _mesa_init_histogram( ctx
);
1182 _mesa_init_hint( ctx
);
1183 _mesa_init_line( ctx
);
1184 _mesa_init_lighting( ctx
);
1185 _mesa_init_matrix( ctx
);
1186 _mesa_init_multisample( ctx
);
1187 _mesa_init_pixel( ctx
);
1188 _mesa_init_point( ctx
);
1189 _mesa_init_polygon( ctx
);
1190 _mesa_init_program( ctx
);
1191 _mesa_init_query( ctx
);
1192 _mesa_init_rastpos( ctx
);
1193 _mesa_init_scissor( ctx
);
1194 _mesa_init_shaderobjects (ctx
);
1195 _mesa_init_stencil( ctx
);
1196 _mesa_init_transform( ctx
);
1197 _mesa_init_varray( ctx
);
1198 _mesa_init_viewport( ctx
);
1200 if (!_mesa_init_texture( ctx
))
1203 _mesa_init_texture_s3tc( ctx
);
1204 _mesa_init_texture_fxt1( ctx
);
1207 ctx
->NewState
= _NEW_ALL
;
1208 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
1216 * This is the default function we plug into all dispatch table slots
1217 * This helps prevents a segfault when someone calls a GL function without
1218 * first checking if the extension's supported.
1223 _mesa_problem(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
1229 * Allocate and initialize a new dispatch table.
1231 static struct _glapi_table
*
1232 alloc_dispatch_table(void)
1234 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1235 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1236 * Mesa we do this to accomodate different versions of libGL and various
1239 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
1240 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
1241 struct _glapi_table
*table
=
1242 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
1244 _glapi_proc
*entry
= (_glapi_proc
*) table
;
1246 for (i
= 0; i
< numEntries
; i
++) {
1247 entry
[i
] = (_glapi_proc
) generic_nop
;
1255 * Initialize a GLcontext struct (rendering context).
1257 * This includes allocating all the other structs and arrays which hang off of
1258 * the context by pointers.
1259 * Note that the driver needs to pass in its dd_function_table here since
1260 * we need to at least call driverFunctions->NewTextureObject to create the
1261 * default texture objects.
1263 * Called by _mesa_create_context().
1265 * Performs the imports and exports callback tables initialization, and
1266 * miscellaneous one-time initializations. If no shared context is supplied one
1267 * is allocated, and increase its reference count. Setups the GL API dispatch
1268 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1269 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1272 * \param ctx the context to initialize
1273 * \param visual describes the visual attributes for this context
1274 * \param share_list points to context to share textures, display lists,
1276 * \param driverFunctions table of device driver functions for this context
1278 * \param driverContext pointer to driver-specific context data
1281 _mesa_initialize_context( GLcontext
*ctx
,
1282 const GLvisual
*visual
,
1283 GLcontext
*share_list
,
1284 const struct dd_function_table
*driverFunctions
,
1285 void *driverContext
)
1287 ASSERT(driverContext
);
1288 assert(driverFunctions
->NewTextureObject
);
1289 assert(driverFunctions
->FreeTexImageData
);
1291 /* If the driver wants core Mesa to use special imports, it'll have to
1292 * override these defaults.
1294 _mesa_init_default_imports( &(ctx
->imports
), driverContext
);
1296 /* initialize the exports (Mesa functions called by the window system) */
1297 _mesa_init_default_exports( &(ctx
->exports
) );
1299 /* misc one-time initializations */
1302 ctx
->Visual
= *visual
;
1303 ctx
->DrawBuffer
= NULL
;
1304 ctx
->ReadBuffer
= NULL
;
1305 ctx
->WinSysDrawBuffer
= NULL
;
1306 ctx
->WinSysReadBuffer
= NULL
;
1308 /* Plug in driver functions and context pointer here.
1309 * This is important because when we call alloc_shared_state() below
1310 * we'll call ctx->Driver.NewTextureObject() to create the default
1313 ctx
->Driver
= *driverFunctions
;
1314 ctx
->DriverCtx
= driverContext
;
1317 /* share state with another context */
1318 ctx
->Shared
= share_list
->Shared
;
1321 /* allocate new, unshared state */
1322 if (!alloc_shared_state( ctx
)) {
1326 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1327 ctx
->Shared
->RefCount
++;
1328 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1330 if (!init_attrib_groups( ctx
)) {
1331 free_shared_state(ctx
, ctx
->Shared
);
1335 /* setup the API dispatch tables */
1336 ctx
->Exec
= alloc_dispatch_table();
1337 ctx
->Save
= alloc_dispatch_table();
1338 if (!ctx
->Exec
|| !ctx
->Save
) {
1339 free_shared_state(ctx
, ctx
->Shared
);
1341 _mesa_free(ctx
->Exec
);
1343 _mesa_init_exec_table(ctx
->Exec
);
1344 ctx
->CurrentDispatch
= ctx
->Exec
;
1346 _mesa_init_dlist_table(ctx
->Save
);
1347 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
1348 /* Neutral tnl module stuff */
1349 _mesa_init_exec_vtxfmt( ctx
);
1350 ctx
->TnlModule
.Current
= NULL
;
1351 ctx
->TnlModule
.SwapCount
= 0;
1354 ctx
->_MaintainTexEnvProgram
= (_mesa_getenv("MESA_TEX_PROG") != NULL
);
1355 ctx
->_UseTexEnvProgram
= ctx
->_MaintainTexEnvProgram
;
1357 ctx
->_MaintainTnlProgram
= (_mesa_getenv("MESA_TNL_PROG") != NULL
);
1358 if (ctx
->_MaintainTnlProgram
)
1359 ctx
->_MaintainTexEnvProgram
= 1; /* this is required... */
1361 ctx
->FirstTimeCurrent
= GL_TRUE
;
1368 * Allocate and initialize a GLcontext structure.
1369 * Note that the driver needs to pass in its dd_function_table here since
1370 * we need to at least call driverFunctions->NewTextureObject to initialize
1371 * the rendering context.
1373 * \param visual a GLvisual pointer (we copy the struct contents)
1374 * \param share_list another context to share display lists with or NULL
1375 * \param driverFunctions points to the dd_function_table into which the
1376 * driver has plugged in all its special functions.
1377 * \param driverCtx points to the device driver's private context state
1379 * \return pointer to a new __GLcontextRec or NULL if error.
1382 _mesa_create_context( const GLvisual
*visual
,
1383 GLcontext
*share_list
,
1384 const struct dd_function_table
*driverFunctions
,
1385 void *driverContext
)
1391 ASSERT(driverContext
);
1393 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
1397 if (_mesa_initialize_context(ctx
, visual
, share_list
,
1398 driverFunctions
, driverContext
)) {
1409 * Free the data associated with the given context.
1411 * But doesn't free the GLcontext struct itself.
1413 * \sa _mesa_initialize_context() and init_attrib_groups().
1416 _mesa_free_context_data( GLcontext
*ctx
)
1418 /* if we're destroying the current context, unbind it first */
1419 if (ctx
== _mesa_get_current_context()) {
1420 _mesa_make_current(NULL
, NULL
, NULL
);
1423 _mesa_free_lighting_data( ctx
);
1424 _mesa_free_eval_data( ctx
);
1425 _mesa_free_texture_data( ctx
);
1426 _mesa_free_matrix_data( ctx
);
1427 _mesa_free_viewport_data( ctx
);
1428 _mesa_free_colortables_data( ctx
);
1429 _mesa_free_program_data(ctx
);
1430 _mesa_free_query_data(ctx
);
1432 #if FEATURE_ARB_vertex_buffer_object
1433 _mesa_delete_buffer_object(ctx
, ctx
->Array
.NullBufferObj
);
1435 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
1437 /* free dispatch tables */
1438 _mesa_free(ctx
->Exec
);
1439 _mesa_free(ctx
->Save
);
1441 /* Shared context state (display lists, textures, etc) */
1442 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1443 ctx
->Shared
->RefCount
--;
1444 assert(ctx
->Shared
->RefCount
>= 0);
1445 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1446 if (ctx
->Shared
->RefCount
== 0) {
1447 /* free shared state */
1448 free_shared_state( ctx
, ctx
->Shared
);
1451 if (ctx
->Extensions
.String
)
1452 _mesa_free((void *) ctx
->Extensions
.String
);
1457 * Destroy a GLcontext structure.
1459 * \param ctx GL context.
1461 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1464 _mesa_destroy_context( GLcontext
*ctx
)
1467 _mesa_free_context_data(ctx
);
1468 _mesa_free( (void *) ctx
);
1475 * Copy attribute groups from one context to another.
1477 * \param src source context
1478 * \param dst destination context
1479 * \param mask bitwise OR of GL_*_BIT flags
1481 * According to the bits specified in \p mask, copies the corresponding
1482 * attributes from \p src into \p dst. For many of the attributes a simple \c
1483 * memcpy is not enough due to the existence of internal pointers in their data
1487 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1489 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1491 dst
->Accum
= src
->Accum
;
1493 if (mask
& GL_COLOR_BUFFER_BIT
) {
1495 dst
->Color
= src
->Color
;
1497 if (mask
& GL_CURRENT_BIT
) {
1499 dst
->Current
= src
->Current
;
1501 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1503 dst
->Depth
= src
->Depth
;
1505 if (mask
& GL_ENABLE_BIT
) {
1508 if (mask
& GL_EVAL_BIT
) {
1510 dst
->Eval
= src
->Eval
;
1512 if (mask
& GL_FOG_BIT
) {
1514 dst
->Fog
= src
->Fog
;
1516 if (mask
& GL_HINT_BIT
) {
1518 dst
->Hint
= src
->Hint
;
1520 if (mask
& GL_LIGHTING_BIT
) {
1522 /* begin with memcpy */
1523 dst
->Light
= src
->Light
;
1524 /* fixup linked lists to prevent pointer insanity */
1525 make_empty_list( &(dst
->Light
.EnabledList
) );
1526 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1527 if (dst
->Light
.Light
[i
].Enabled
) {
1528 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1532 if (mask
& GL_LINE_BIT
) {
1534 dst
->Line
= src
->Line
;
1536 if (mask
& GL_LIST_BIT
) {
1538 dst
->List
= src
->List
;
1540 if (mask
& GL_PIXEL_MODE_BIT
) {
1542 dst
->Pixel
= src
->Pixel
;
1544 if (mask
& GL_POINT_BIT
) {
1546 dst
->Point
= src
->Point
;
1548 if (mask
& GL_POLYGON_BIT
) {
1550 dst
->Polygon
= src
->Polygon
;
1552 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1553 /* Use loop instead of MEMCPY due to problem with Portland Group's
1554 * C compiler. Reported by John Stone.
1557 for (i
= 0; i
< 32; i
++) {
1558 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1561 if (mask
& GL_SCISSOR_BIT
) {
1563 dst
->Scissor
= src
->Scissor
;
1565 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1567 dst
->Stencil
= src
->Stencil
;
1569 if (mask
& GL_TEXTURE_BIT
) {
1570 /* Cannot memcpy because of pointers */
1571 _mesa_copy_texture_state(src
, dst
);
1573 if (mask
& GL_TRANSFORM_BIT
) {
1575 dst
->Transform
= src
->Transform
;
1577 if (mask
& GL_VIEWPORT_BIT
) {
1578 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1579 dst
->Viewport
.X
= src
->Viewport
.X
;
1580 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1581 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1582 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1583 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1584 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1585 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1588 /* XXX FIXME: Call callbacks?
1590 dst
->NewState
= _NEW_ALL
;
1596 * Check if the given context can render into the given framebuffer
1597 * by checking visual attributes.
1599 * XXX this may go away someday because we're moving toward more freedom
1600 * in binding contexts to drawables with different visual attributes.
1601 * The GL_EXT_f_b_o extension is prompting some of that.
1603 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1606 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1608 const GLvisual
*ctxvis
= &ctx
->Visual
;
1609 const GLvisual
*bufvis
= &buffer
->Visual
;
1611 if (ctxvis
== bufvis
)
1614 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1617 /* disabling this fixes the fgl_glxgears pbuffer demo */
1618 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1621 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1623 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1625 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1627 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1629 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1631 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1633 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1635 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1637 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1645 * Do one-time initialization for the given framebuffer. Specifically,
1646 * ask the driver for the window's current size and update the framebuffer
1648 * Really, the device driver should totally take care of this.
1651 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1653 GLuint width
, height
;
1654 if (ctx
->Driver
.GetBufferSize
) {
1655 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1656 if (ctx
->Driver
.ResizeBuffers
)
1657 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1658 fb
->Initialized
= GL_TRUE
;
1664 * Bind the given context to the given drawBuffer and readBuffer and
1665 * make it the current context for the calling thread.
1666 * We'll render into the drawBuffer and read pixels from the
1667 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1669 * We check that the context's and framebuffer's visuals are compatible
1670 * and return immediately if they're not.
1672 * \param newCtx the new GL context. If NULL then there will be no current GL
1674 * \param drawBuffer the drawing framebuffer
1675 * \param readBuffer the reading framebuffer
1678 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1679 GLframebuffer
*readBuffer
)
1681 if (MESA_VERBOSE
& VERBOSE_API
)
1682 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1684 /* Check that the context's and framebuffer's visuals are compatible.
1686 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1687 if (!check_compatible(newCtx
, drawBuffer
)) {
1688 _mesa_warning(newCtx
,
1689 "MakeCurrent: incompatible visuals for context and drawbuffer");
1693 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1694 if (!check_compatible(newCtx
, readBuffer
)) {
1695 _mesa_warning(newCtx
,
1696 "MakeCurrent: incompatible visuals for context and readbuffer");
1701 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1702 _glapi_set_context((void *) newCtx
);
1703 ASSERT(_mesa_get_current_context() == newCtx
);
1706 _glapi_set_dispatch(NULL
); /* none current */
1709 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1711 if (drawBuffer
&& readBuffer
) {
1712 /* TODO: check if newCtx and buffer's visual match??? */
1714 ASSERT(drawBuffer
->Name
== 0);
1715 ASSERT(readBuffer
->Name
== 0);
1716 newCtx
->WinSysDrawBuffer
= drawBuffer
;
1717 newCtx
->WinSysReadBuffer
= readBuffer
;
1720 * Only set the context's Draw/ReadBuffer fields if they're NULL
1721 * or not bound to a user-created FBO.
1723 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1724 newCtx
->DrawBuffer
= drawBuffer
;
1726 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1727 newCtx
->ReadBuffer
= readBuffer
;
1730 newCtx
->NewState
|= _NEW_BUFFERS
;
1733 /* We want to get rid of these lines: */
1736 if (!drawBuffer
->Initialized
) {
1737 initialize_framebuffer_size(newCtx
, drawBuffer
);
1739 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1740 initialize_framebuffer_size(newCtx
, readBuffer
);
1743 _mesa_resizebuffers(newCtx
);
1747 /* We want the drawBuffer and readBuffer to be initialized by
1749 * This generally means the Width and Height match the actual
1750 * window size and the renderbuffers (both hardware and software
1751 * based) are allocated to match. The later can generally be
1752 * done with a call to _mesa_resize_framebuffer().
1754 * It's theoretically possible for a buffer to have zero width
1755 * or height, but for now, assert check that the driver did what's
1758 ASSERT(drawBuffer
->Width
> 0);
1759 ASSERT(drawBuffer
->Height
> 0);
1762 if (newCtx
->FirstTimeCurrent
) {
1763 /* set initial viewport and scissor size now */
1764 _mesa_set_viewport(newCtx
, 0, 0,
1765 drawBuffer
->Width
, drawBuffer
->Height
);
1766 _mesa_set_scissor(newCtx
, 0, 0,
1767 drawBuffer
->Width
, drawBuffer
->Height
);
1768 check_context_limits(newCtx
);
1772 /* We can use this to help debug user's problems. Tell them to set
1773 * the MESA_INFO env variable before running their app. Then the
1774 * first time each context is made current we'll print some useful
1777 if (newCtx
->FirstTimeCurrent
) {
1778 if (_mesa_getenv("MESA_INFO")) {
1781 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1788 * Make context 'ctx' share the display lists, textures and programs
1789 * that are associated with 'ctxToShare'.
1790 * Any display lists, textures or programs associated with 'ctx' will
1791 * be deleted if nobody else is sharing them.
1794 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1796 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1797 ctx
->Shared
->RefCount
--;
1798 if (ctx
->Shared
->RefCount
== 0) {
1799 free_shared_state(ctx
, ctx
->Shared
);
1801 ctx
->Shared
= ctxToShare
->Shared
;
1802 ctx
->Shared
->RefCount
++;
1813 * Get current context for the calling thread.
1815 * \return pointer to the current GL context.
1817 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1818 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in context.h.
1821 _mesa_get_current_context( void )
1823 return (GLcontext
*) _glapi_get_context();
1827 * Get context's current API dispatch table.
1829 * It'll either be the immediate-mode execute dispatcher or the display list
1830 * compile dispatcher.
1832 * \param ctx GL context.
1834 * \return pointer to dispatch_table.
1836 * Simply returns __GLcontextRec::CurrentDispatch.
1838 struct _glapi_table
*
1839 _mesa_get_dispatch(GLcontext
*ctx
)
1841 return ctx
->CurrentDispatch
;
1847 /**********************************************************************/
1848 /** \name Miscellaneous functions */
1849 /**********************************************************************/
1855 * \param ctx GL context.
1856 * \param error error code.
1858 * Records the given error code and call the driver's dd_function_table::Error
1859 * function if defined.
1862 * This is called via _mesa_error().
1865 _mesa_record_error( GLcontext
*ctx
, GLenum error
)
1870 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1871 ctx
->ErrorValue
= error
;
1874 /* Call device driver's error handler, if any. This is used on the Mac. */
1875 if (ctx
->Driver
.Error
) {
1876 (*ctx
->Driver
.Error
)( ctx
);
1881 * Execute glFinish().
1883 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1884 * dd_function_table::Finish driver callback, if not NULL.
1887 _mesa_Finish( void )
1889 GET_CURRENT_CONTEXT(ctx
);
1890 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1891 if (ctx
->Driver
.Finish
) {
1892 (*ctx
->Driver
.Finish
)( ctx
);
1897 * Execute glFlush().
1899 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1900 * dd_function_table::Flush driver callback, if not NULL.
1905 GET_CURRENT_CONTEXT(ctx
);
1906 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1907 if (ctx
->Driver
.Flush
) {
1908 (*ctx
->Driver
.Flush
)( ctx
);