3 * Mesa context/visual/framebuffer management functions.
8 * Mesa 3-D graphics library
11 * Copyright (C) 1999-2007 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"
98 #include "framebuffer.h"
100 #include "histogram.h"
110 #include "queryobj.h"
112 #include "simple_list.h"
115 #include "texcompress.h"
116 #include "teximage.h"
118 #include "texstate.h"
123 #include "glapi/glthread.h"
124 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
125 #include "shader/program.h"
127 #include "shader/shader_api.h"
128 #include "shader/atifragshader.h"
130 #include "math/m_translate.h"
131 #include "math/m_matrix.h"
132 #include "math/m_xform.h"
133 #include "math/mathmod.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
);
157 * Swap buffers notification callback.
159 * \param gc GL context.
161 * Called by window system just before swapping buffers.
162 * We have to finish any pending rendering.
165 _mesa_notifySwapBuffers(__GLcontext
*gc
)
167 FLUSH_VERTICES( gc
, 0 );
171 /**********************************************************************/
172 /** \name GL Visual allocation/destruction */
173 /**********************************************************************/
177 * Allocates a GLvisual structure and initializes it via
178 * _mesa_initialize_visual().
180 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
181 * \param dbFlag double buffering
182 * \param stereoFlag stereo buffer
183 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
184 * is acceptable but the actual depth type will be GLushort or GLuint as
186 * \param stencilBits requested minimum bits per stencil buffer value
187 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
188 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
189 * \param redBits number of bits per color component in frame buffer for RGB(A)
190 * mode. We always use 8 in core Mesa though.
191 * \param greenBits same as above.
192 * \param blueBits same as above.
193 * \param alphaBits same as above.
194 * \param numSamples not really used.
196 * \return pointer to new GLvisual or NULL if requested parameters can't be
199 * \note Need to add params for level and numAuxBuffers (at least)
202 _mesa_create_visual( GLboolean rgbFlag
,
204 GLboolean stereoFlag
,
213 GLint accumGreenBits
,
215 GLint accumAlphaBits
,
218 GLvisual
*vis
= (GLvisual
*) _mesa_calloc(sizeof(GLvisual
));
220 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
221 redBits
, greenBits
, blueBits
, alphaBits
,
222 indexBits
, depthBits
, stencilBits
,
223 accumRedBits
, accumGreenBits
,
224 accumBlueBits
, accumAlphaBits
,
234 * Makes some sanity checks and fills in the fields of the
235 * GLvisual object with the given parameters. If the caller needs
236 * to set additional fields, he should just probably init the whole GLvisual
238 * \return GL_TRUE on success, or GL_FALSE on failure.
240 * \sa _mesa_create_visual() above for the parameter description.
243 _mesa_initialize_visual( GLvisual
*vis
,
246 GLboolean stereoFlag
,
255 GLint accumGreenBits
,
257 GLint accumAlphaBits
,
262 if (depthBits
< 0 || depthBits
> 32) {
265 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
268 assert(accumRedBits
>= 0);
269 assert(accumGreenBits
>= 0);
270 assert(accumBlueBits
>= 0);
271 assert(accumAlphaBits
>= 0);
273 vis
->rgbMode
= rgbFlag
;
274 vis
->doubleBufferMode
= dbFlag
;
275 vis
->stereoMode
= stereoFlag
;
277 vis
->redBits
= redBits
;
278 vis
->greenBits
= greenBits
;
279 vis
->blueBits
= blueBits
;
280 vis
->alphaBits
= alphaBits
;
281 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
283 vis
->indexBits
= indexBits
;
284 vis
->depthBits
= depthBits
;
285 vis
->stencilBits
= stencilBits
;
287 vis
->accumRedBits
= accumRedBits
;
288 vis
->accumGreenBits
= accumGreenBits
;
289 vis
->accumBlueBits
= accumBlueBits
;
290 vis
->accumAlphaBits
= accumAlphaBits
;
292 vis
->haveAccumBuffer
= accumRedBits
> 0;
293 vis
->haveDepthBuffer
= depthBits
> 0;
294 vis
->haveStencilBuffer
= stencilBits
> 0;
296 vis
->numAuxBuffers
= 0;
299 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
300 vis
->samples
= numSamples
;
307 * Destroy a visual and free its memory.
311 * Frees the visual structure.
314 _mesa_destroy_visual( GLvisual
*vis
)
322 /**********************************************************************/
323 /** \name Context allocation, initialization, destroying
325 * The purpose of the most initialization functions here is to provide the
326 * default state values according to the OpenGL specification.
328 /**********************************************************************/
332 * One-time initialization mutex lock.
334 * \sa Used by one_time_init().
336 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
339 * Calls all the various one-time-init functions in Mesa.
341 * While holding a global mutex lock, calls several initialization functions,
342 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
348 one_time_init( GLcontext
*ctx
)
350 static GLboolean alreadyCalled
= GL_FALSE
;
352 _glthread_LOCK_MUTEX(OneTimeLock
);
353 if (!alreadyCalled
) {
356 /* do some implementation tests */
357 assert( sizeof(GLbyte
) == 1 );
358 assert( sizeof(GLubyte
) == 1 );
359 assert( sizeof(GLshort
) == 2 );
360 assert( sizeof(GLushort
) == 2 );
361 assert( sizeof(GLint
) == 4 );
362 assert( sizeof(GLuint
) == 4 );
364 _mesa_init_sqrt_table();
369 for (i
= 0; i
< 256; i
++) {
370 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
375 _mesa_init_sparc_glapi_relocs();
377 if (_mesa_getenv("MESA_DEBUG")) {
378 _glapi_noop_enable_warnings(GL_TRUE
);
379 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
382 _glapi_noop_enable_warnings(GL_FALSE
);
385 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
386 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
387 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
390 alreadyCalled
= GL_TRUE
;
392 _glthread_UNLOCK_MUTEX(OneTimeLock
);
397 * Allocate and initialize a shared context state structure.
398 * Initializes the display list, texture objects and vertex programs hash
399 * tables, allocates the texture objects. If it runs out of memory, frees
400 * everything already allocated before returning NULL.
402 * \return pointer to a gl_shared_state structure on success, or NULL on
406 alloc_shared_state( GLcontext
*ctx
)
408 struct gl_shared_state
*ss
= CALLOC_STRUCT(gl_shared_state
);
414 _glthread_INIT_MUTEX(ss
->Mutex
);
416 ss
->DisplayList
= _mesa_NewHashTable();
417 ss
->TexObjects
= _mesa_NewHashTable();
418 #if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
419 ss
->Programs
= _mesa_NewHashTable();
422 #if FEATURE_ARB_vertex_program
423 ss
->DefaultVertexProgram
= ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
424 if (!ss
->DefaultVertexProgram
)
427 #if FEATURE_ARB_fragment_program
428 ss
->DefaultFragmentProgram
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
429 if (!ss
->DefaultFragmentProgram
)
432 #if FEATURE_ATI_fragment_shader
433 ss
->ATIShaders
= _mesa_NewHashTable();
434 ss
->DefaultFragmentShader
= _mesa_new_ati_fragment_shader(ctx
, 0);
435 if (!ss
->DefaultFragmentShader
)
439 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
440 ss
->BufferObjects
= _mesa_NewHashTable();
443 ss
->ArrayObjects
= _mesa_NewHashTable();
445 #if FEATURE_ARB_shader_objects
446 ss
->ShaderObjects
= _mesa_NewHashTable();
449 ss
->Default1D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D
);
453 ss
->Default2D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D
);
457 ss
->Default3D
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_3D
);
461 ss
->DefaultCubeMap
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_CUBE_MAP_ARB
);
462 if (!ss
->DefaultCubeMap
)
465 ss
->DefaultRect
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_RECTANGLE_NV
);
466 if (!ss
->DefaultRect
)
469 ss
->Default1DArray
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_1D_ARRAY_EXT
);
470 if (!ss
->Default1DArray
)
473 ss
->Default2DArray
= (*ctx
->Driver
.NewTextureObject
)(ctx
, 0, GL_TEXTURE_2D_ARRAY_EXT
);
474 if (!ss
->Default2DArray
)
478 assert(ss
->Default1D
->RefCount
== 1);
480 _glthread_INIT_MUTEX(ss
->TexMutex
);
481 ss
->TextureStateStamp
= 0;
483 #if FEATURE_EXT_framebuffer_object
484 ss
->FrameBuffers
= _mesa_NewHashTable();
485 if (!ss
->FrameBuffers
)
487 ss
->RenderBuffers
= _mesa_NewHashTable();
488 if (!ss
->RenderBuffers
)
495 /* Ran out of memory at some point. Free everything and return NULL */
497 _mesa_DeleteHashTable(ss
->DisplayList
);
499 _mesa_DeleteHashTable(ss
->TexObjects
);
500 #if FEATURE_NV_vertex_program
502 _mesa_DeleteHashTable(ss
->Programs
);
504 #if FEATURE_ARB_vertex_program
505 if (ss
->DefaultVertexProgram
)
506 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
508 #if FEATURE_ARB_fragment_program
509 if (ss
->DefaultFragmentProgram
)
510 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
512 #if FEATURE_ATI_fragment_shader
513 if (ss
->DefaultFragmentShader
)
514 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
516 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
517 if (ss
->BufferObjects
)
518 _mesa_DeleteHashTable(ss
->BufferObjects
);
521 if (ss
->ArrayObjects
)
522 _mesa_DeleteHashTable (ss
->ArrayObjects
);
524 #if FEATURE_ARB_shader_objects
525 if (ss
->ShaderObjects
)
526 _mesa_DeleteHashTable (ss
->ShaderObjects
);
529 #if FEATURE_EXT_framebuffer_object
530 if (ss
->FrameBuffers
)
531 _mesa_DeleteHashTable(ss
->FrameBuffers
);
532 if (ss
->RenderBuffers
)
533 _mesa_DeleteHashTable(ss
->RenderBuffers
);
537 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1D
);
539 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2D
);
541 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default3D
);
542 if (ss
->DefaultCubeMap
)
543 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultCubeMap
);
545 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->DefaultRect
);
546 if (ss
->Default1DArray
)
547 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default1DArray
);
548 if (ss
->Default2DArray
)
549 (*ctx
->Driver
.DeleteTexture
)(ctx
, ss
->Default2DArray
);
558 * Callback for deleting a display list. Called by _mesa_HashDeleteAll().
561 delete_displaylist_cb(GLuint id
, void *data
, void *userData
)
563 struct mesa_display_list
*list
= (struct mesa_display_list
*) data
;
564 GLcontext
*ctx
= (GLcontext
*) userData
;
565 _mesa_delete_list(ctx
, list
);
569 * Callback for deleting a texture object. Called by _mesa_HashDeleteAll().
572 delete_texture_cb(GLuint id
, void *data
, void *userData
)
574 struct gl_texture_object
*texObj
= (struct gl_texture_object
*) data
;
575 GLcontext
*ctx
= (GLcontext
*) userData
;
576 ctx
->Driver
.DeleteTexture(ctx
, texObj
);
580 * Callback for deleting a program object. Called by _mesa_HashDeleteAll().
583 delete_program_cb(GLuint id
, void *data
, void *userData
)
585 struct gl_program
*prog
= (struct gl_program
*) data
;
586 GLcontext
*ctx
= (GLcontext
*) userData
;
587 ctx
->Driver
.DeleteProgram(ctx
, prog
);
591 * Callback for deleting an ATI fragment shader object.
592 * Called by _mesa_HashDeleteAll().
595 delete_fragshader_cb(GLuint id
, void *data
, void *userData
)
597 struct ati_fragment_shader
*shader
= (struct ati_fragment_shader
*) data
;
598 GLcontext
*ctx
= (GLcontext
*) userData
;
599 _mesa_delete_ati_fragment_shader(ctx
, shader
);
603 * Callback for deleting a buffer object. Called by _mesa_HashDeleteAll().
606 delete_bufferobj_cb(GLuint id
, void *data
, void *userData
)
608 struct gl_buffer_object
*bufObj
= (struct gl_buffer_object
*) data
;
609 GLcontext
*ctx
= (GLcontext
*) userData
;
610 ctx
->Driver
.DeleteBuffer(ctx
, bufObj
);
614 * Callback for deleting an array object. Called by _mesa_HashDeleteAll().
617 delete_arrayobj_cb(GLuint id
, void *data
, void *userData
)
619 struct gl_array_object
*arrayObj
= (struct gl_array_object
*) data
;
620 GLcontext
*ctx
= (GLcontext
*) userData
;
621 _mesa_delete_array_object(ctx
, arrayObj
);
625 * Callback for freeing shader program data. Call it before delete_shader_cb
626 * to avoid memory access error.
629 free_shader_program_data_cb(GLuint id
, void *data
, void *userData
)
631 GLcontext
*ctx
= (GLcontext
*) userData
;
632 struct gl_shader_program
*shProg
= (struct gl_shader_program
*) data
;
634 if (shProg
->Type
== GL_SHADER_PROGRAM_MESA
) {
635 _mesa_free_shader_program_data(ctx
, shProg
);
640 * Callback for deleting shader and shader programs objects.
641 * Called by _mesa_HashDeleteAll().
644 delete_shader_cb(GLuint id
, void *data
, void *userData
)
646 GLcontext
*ctx
= (GLcontext
*) userData
;
647 struct gl_shader
*sh
= (struct gl_shader
*) data
;
648 if (sh
->Type
== GL_FRAGMENT_SHADER
|| sh
->Type
== GL_VERTEX_SHADER
) {
649 _mesa_free_shader(ctx
, sh
);
652 struct gl_shader_program
*shProg
= (struct gl_shader_program
*) data
;
653 ASSERT(shProg
->Type
== GL_SHADER_PROGRAM_MESA
);
654 _mesa_free_shader_program(ctx
, shProg
);
659 * Callback for deleting a framebuffer object. Called by _mesa_HashDeleteAll()
662 delete_framebuffer_cb(GLuint id
, void *data
, void *userData
)
664 struct gl_framebuffer
*fb
= (struct gl_framebuffer
*) data
;
665 /* The fact that the framebuffer is in the hashtable means its refcount
666 * is one, but we're removing from the hashtable now. So clear refcount.
668 /*assert(fb->RefCount == 1);*/
671 /* NOTE: Delete should always be defined but there are two reports
672 * of it being NULL (bugs 13507, 14293). Work-around for now.
679 * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
682 delete_renderbuffer_cb(GLuint id
, void *data
, void *userData
)
684 struct gl_renderbuffer
*rb
= (struct gl_renderbuffer
*) data
;
685 rb
->RefCount
= 0; /* see comment for FBOs above */
692 * Deallocate a shared state object and all children structures.
694 * \param ctx GL context.
695 * \param ss shared state pointer.
697 * Frees the display lists, the texture objects (calling the driver texture
698 * deletion callback to free its private data) and the vertex programs, as well
699 * as their hash tables.
701 * \sa alloc_shared_state().
704 free_shared_state( GLcontext
*ctx
, struct gl_shared_state
*ss
)
709 _mesa_HashDeleteAll(ss
->DisplayList
, delete_displaylist_cb
, ctx
);
710 _mesa_DeleteHashTable(ss
->DisplayList
);
712 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_NV_fragment_program)
713 _mesa_HashDeleteAll(ss
->Programs
, delete_program_cb
, ctx
);
714 _mesa_DeleteHashTable(ss
->Programs
);
716 #if FEATURE_ARB_vertex_program
717 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultVertexProgram
);
719 #if FEATURE_ARB_fragment_program
720 ctx
->Driver
.DeleteProgram(ctx
, ss
->DefaultFragmentProgram
);
723 #if FEATURE_ATI_fragment_shader
724 _mesa_HashDeleteAll(ss
->ATIShaders
, delete_fragshader_cb
, ctx
);
725 _mesa_DeleteHashTable(ss
->ATIShaders
);
726 _mesa_delete_ati_fragment_shader(ctx
, ss
->DefaultFragmentShader
);
729 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
730 _mesa_HashDeleteAll(ss
->BufferObjects
, delete_bufferobj_cb
, ctx
);
731 _mesa_DeleteHashTable(ss
->BufferObjects
);
734 _mesa_HashDeleteAll(ss
->ArrayObjects
, delete_arrayobj_cb
, ctx
);
735 _mesa_DeleteHashTable(ss
->ArrayObjects
);
737 #if FEATURE_ARB_shader_objects
738 _mesa_HashWalk(ss
->ShaderObjects
, free_shader_program_data_cb
, ctx
);
739 _mesa_HashDeleteAll(ss
->ShaderObjects
, delete_shader_cb
, ctx
);
740 _mesa_DeleteHashTable(ss
->ShaderObjects
);
743 #if FEATURE_EXT_framebuffer_object
744 _mesa_HashDeleteAll(ss
->FrameBuffers
, delete_framebuffer_cb
, ctx
);
745 _mesa_DeleteHashTable(ss
->FrameBuffers
);
746 _mesa_HashDeleteAll(ss
->RenderBuffers
, delete_renderbuffer_cb
, ctx
);
747 _mesa_DeleteHashTable(ss
->RenderBuffers
);
751 * Free texture objects (after FBOs since some textures might have
752 * been bound to FBOs).
754 ASSERT(ctx
->Driver
.DeleteTexture
);
755 /* the default textures */
756 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default1D
);
757 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default2D
);
758 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default3D
);
759 ctx
->Driver
.DeleteTexture(ctx
, ss
->DefaultCubeMap
);
760 ctx
->Driver
.DeleteTexture(ctx
, ss
->DefaultRect
);
761 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default1DArray
);
762 ctx
->Driver
.DeleteTexture(ctx
, ss
->Default2DArray
);
763 /* all other textures */
764 _mesa_HashDeleteAll(ss
->TexObjects
, delete_texture_cb
, ctx
);
765 _mesa_DeleteHashTable(ss
->TexObjects
);
767 _glthread_DESTROY_MUTEX(ss
->Mutex
);
774 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
777 _mesa_init_current(GLcontext
*ctx
)
781 /* Init all to (0,0,0,1) */
782 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
783 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
786 /* redo special cases: */
787 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
788 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
789 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
790 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
791 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
792 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
797 * Init vertex/fragment program native limits from logical limits.
800 init_natives(struct gl_program_constants
*prog
)
802 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
803 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
804 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
805 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
806 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
807 prog
->MaxNativeTemps
= prog
->MaxTemps
;
808 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
809 prog
->MaxNativeParameters
= prog
->MaxParameters
;
814 * Initialize fields of gl_constants (aka ctx->Const.*).
815 * Use defaults from config.h. The device drivers will often override
816 * some of these values (such as number of texture units).
819 _mesa_init_constants(GLcontext
*ctx
)
823 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
824 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
826 assert(MAX_TEXTURE_UNITS
>= MAX_TEXTURE_COORD_UNITS
);
827 assert(MAX_TEXTURE_UNITS
>= MAX_TEXTURE_IMAGE_UNITS
);
829 /* Constants, may be overriden (usually only reduced) by device drivers */
830 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
831 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
832 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
833 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
834 ctx
->Const
.MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
835 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
836 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
837 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
838 ctx
->Const
.MaxTextureImageUnits
);
839 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
840 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
841 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
842 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
843 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
844 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
845 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
846 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
847 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
848 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
849 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
850 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
851 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
852 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
853 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
854 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
855 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
856 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
857 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
858 ctx
->Const
.MaxShininess
= 128.0;
859 ctx
->Const
.MaxSpotExponent
= 128.0;
860 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
861 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
862 #if FEATURE_ARB_vertex_program
863 ctx
->Const
.VertexProgram
.MaxInstructions
= MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS
;
864 ctx
->Const
.VertexProgram
.MaxAluInstructions
= 0;
865 ctx
->Const
.VertexProgram
.MaxTexInstructions
= 0;
866 ctx
->Const
.VertexProgram
.MaxTexIndirections
= 0;
867 ctx
->Const
.VertexProgram
.MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
868 ctx
->Const
.VertexProgram
.MaxTemps
= MAX_PROGRAM_TEMPS
;
869 ctx
->Const
.VertexProgram
.MaxParameters
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
870 ctx
->Const
.VertexProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
871 ctx
->Const
.VertexProgram
.MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
872 ctx
->Const
.VertexProgram
.MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
873 ctx
->Const
.VertexProgram
.MaxUniformComponents
= 4 * MAX_UNIFORMS
;
874 init_natives(&ctx
->Const
.VertexProgram
);
877 #if FEATURE_ARB_fragment_program
878 ctx
->Const
.FragmentProgram
.MaxInstructions
= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS
;
879 ctx
->Const
.FragmentProgram
.MaxAluInstructions
= MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS
;
880 ctx
->Const
.FragmentProgram
.MaxTexInstructions
= MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS
;
881 ctx
->Const
.FragmentProgram
.MaxTexIndirections
= MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS
;
882 ctx
->Const
.FragmentProgram
.MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
883 ctx
->Const
.FragmentProgram
.MaxTemps
= MAX_PROGRAM_TEMPS
;
884 ctx
->Const
.FragmentProgram
.MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
885 ctx
->Const
.FragmentProgram
.MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
886 ctx
->Const
.FragmentProgram
.MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
887 ctx
->Const
.FragmentProgram
.MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
888 ctx
->Const
.FragmentProgram
.MaxUniformComponents
= 4 * MAX_UNIFORMS
;
889 init_natives(&ctx
->Const
.FragmentProgram
);
891 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
892 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
894 /* CheckArrayBounds is overriden by drivers/x11 for X server */
895 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
897 /* GL_ARB_draw_buffers */
898 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
900 /* GL_OES_read_format */
901 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
902 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
904 #if FEATURE_EXT_framebuffer_object
905 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
906 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
909 #if FEATURE_ARB_vertex_shader
910 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
911 ctx
->Const
.MaxVarying
= MAX_VARYING
;
915 ASSERT(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
916 ctx
->Const
.MaxTextureCoordUnits
));
917 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
918 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
920 ASSERT(MAX_NV_FRAGMENT_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
921 ASSERT(MAX_NV_VERTEX_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
922 ASSERT(MAX_NV_VERTEX_PROGRAM_INPUTS
<= VERT_ATTRIB_MAX
);
923 ASSERT(MAX_NV_VERTEX_PROGRAM_OUTPUTS
<= VERT_RESULT_MAX
);
928 * Do some sanity checks on the limits/constants for the given context.
929 * Only called the first time a context is bound.
932 check_context_limits(GLcontext
*ctx
)
934 /* Many context limits/constants are limited by the size of
937 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
938 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
939 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
940 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
942 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
943 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
945 /* make sure largest texture image is <= MAX_WIDTH in size */
946 assert((1 << (ctx
->Const
.MaxTextureLevels
-1 )) <= MAX_WIDTH
);
947 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
-1 )) <= MAX_WIDTH
);
948 assert((1 << (ctx
->Const
.Max3DTextureLevels
-1 )) <= MAX_WIDTH
);
950 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
952 /* XXX probably add more tests */
957 * Initialize the attribute groups in a GL context.
959 * \param ctx GL context.
961 * Initializes all the attributes, calling the respective <tt>init*</tt>
962 * functions for the more complex data structures.
965 init_attrib_groups(GLcontext
*ctx
)
970 _mesa_init_constants( ctx
);
973 _mesa_init_extensions( ctx
);
975 /* Attribute Groups */
976 _mesa_init_accum( ctx
);
977 _mesa_init_attrib( ctx
);
978 _mesa_init_buffer_objects( ctx
);
979 _mesa_init_color( ctx
);
980 _mesa_init_colortables( ctx
);
981 _mesa_init_current( ctx
);
982 _mesa_init_depth( ctx
);
983 _mesa_init_debug( ctx
);
984 _mesa_init_display_list( ctx
);
985 _mesa_init_eval( ctx
);
986 _mesa_init_feedback( ctx
);
987 _mesa_init_fog( ctx
);
988 _mesa_init_histogram( ctx
);
989 _mesa_init_hint( ctx
);
990 _mesa_init_line( ctx
);
991 _mesa_init_lighting( ctx
);
992 _mesa_init_matrix( ctx
);
993 _mesa_init_multisample( ctx
);
994 _mesa_init_pixel( ctx
);
995 _mesa_init_point( ctx
);
996 _mesa_init_polygon( ctx
);
997 _mesa_init_program( ctx
);
998 _mesa_init_query( ctx
);
999 _mesa_init_rastpos( ctx
);
1000 _mesa_init_scissor( ctx
);
1001 _mesa_init_shader_state( ctx
);
1002 _mesa_init_stencil( ctx
);
1003 _mesa_init_transform( ctx
);
1004 _mesa_init_varray( ctx
);
1005 _mesa_init_viewport( ctx
);
1007 if (!_mesa_init_texture( ctx
))
1010 _mesa_init_texture_s3tc( ctx
);
1011 _mesa_init_texture_fxt1( ctx
);
1014 ctx
->NewState
= _NEW_ALL
;
1015 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
1022 * Update default objects in a GL context with respect to shared state.
1024 * \param ctx GL context.
1026 * Removes references to old default objects, (texture objects, program
1027 * objects, etc.) and changes to reference those from the current shared
1031 update_default_objects(GLcontext
*ctx
)
1035 _mesa_update_default_objects_program(ctx
);
1036 _mesa_update_default_objects_texture(ctx
);
1037 _mesa_update_default_objects_buffer_objects(ctx
);
1044 * This is the default function we plug into all dispatch table slots
1045 * This helps prevents a segfault when someone calls a GL function without
1046 * first checking if the extension's supported.
1051 _mesa_warning(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
1057 * Allocate and initialize a new dispatch table.
1059 static struct _glapi_table
*
1060 alloc_dispatch_table(void)
1062 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1063 * In practice, this'll be the same for stand-alone Mesa. But for DRI
1064 * Mesa we do this to accomodate different versions of libGL and various
1067 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
1068 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
1069 struct _glapi_table
*table
=
1070 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
1072 _glapi_proc
*entry
= (_glapi_proc
*) table
;
1074 for (i
= 0; i
< numEntries
; i
++) {
1075 entry
[i
] = (_glapi_proc
) generic_nop
;
1083 * Initialize a GLcontext struct (rendering context).
1085 * This includes allocating all the other structs and arrays which hang off of
1086 * the context by pointers.
1087 * Note that the driver needs to pass in its dd_function_table here since
1088 * we need to at least call driverFunctions->NewTextureObject to create the
1089 * default texture objects.
1091 * Called by _mesa_create_context().
1093 * Performs the imports and exports callback tables initialization, and
1094 * miscellaneous one-time initializations. If no shared context is supplied one
1095 * is allocated, and increase its reference count. Setups the GL API dispatch
1096 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
1097 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
1100 * \param ctx the context to initialize
1101 * \param visual describes the visual attributes for this context
1102 * \param share_list points to context to share textures, display lists,
1104 * \param driverFunctions table of device driver functions for this context
1106 * \param driverContext pointer to driver-specific context data
1109 _mesa_initialize_context(GLcontext
*ctx
,
1110 const GLvisual
*visual
,
1111 GLcontext
*share_list
,
1112 const struct dd_function_table
*driverFunctions
,
1113 void *driverContext
)
1115 ASSERT(driverContext
);
1116 assert(driverFunctions
->NewTextureObject
);
1117 assert(driverFunctions
->FreeTexImageData
);
1119 /* misc one-time initializations */
1122 ctx
->Visual
= *visual
;
1123 ctx
->DrawBuffer
= NULL
;
1124 ctx
->ReadBuffer
= NULL
;
1125 ctx
->WinSysDrawBuffer
= NULL
;
1126 ctx
->WinSysReadBuffer
= NULL
;
1128 /* Plug in driver functions and context pointer here.
1129 * This is important because when we call alloc_shared_state() below
1130 * we'll call ctx->Driver.NewTextureObject() to create the default
1133 ctx
->Driver
= *driverFunctions
;
1134 ctx
->DriverCtx
= driverContext
;
1137 /* share state with another context */
1138 ctx
->Shared
= share_list
->Shared
;
1141 /* allocate new, unshared state */
1142 if (!alloc_shared_state( ctx
)) {
1146 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1147 ctx
->Shared
->RefCount
++;
1148 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1150 if (!init_attrib_groups( ctx
)) {
1151 free_shared_state(ctx
, ctx
->Shared
);
1155 /* setup the API dispatch tables */
1156 ctx
->Exec
= alloc_dispatch_table();
1157 ctx
->Save
= alloc_dispatch_table();
1158 if (!ctx
->Exec
|| !ctx
->Save
) {
1159 free_shared_state(ctx
, ctx
->Shared
);
1161 _mesa_free(ctx
->Exec
);
1163 _mesa_init_exec_table(ctx
->Exec
);
1164 ctx
->CurrentDispatch
= ctx
->Exec
;
1166 _mesa_init_dlist_table(ctx
->Save
);
1167 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
1168 /* Neutral tnl module stuff */
1169 _mesa_init_exec_vtxfmt( ctx
);
1170 ctx
->TnlModule
.Current
= NULL
;
1171 ctx
->TnlModule
.SwapCount
= 0;
1174 ctx
->FragmentProgram
._MaintainTexEnvProgram
1175 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
1176 ctx
->FragmentProgram
._UseTexEnvProgram
= ctx
->FragmentProgram
._MaintainTexEnvProgram
;
1178 ctx
->VertexProgram
._MaintainTnlProgram
1179 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
1180 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1181 /* this is required... */
1182 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1185 ctx
->FirstTimeCurrent
= GL_TRUE
;
1192 * Allocate and initialize a GLcontext structure.
1193 * Note that the driver needs to pass in its dd_function_table here since
1194 * we need to at least call driverFunctions->NewTextureObject to initialize
1195 * the rendering context.
1197 * \param visual a GLvisual pointer (we copy the struct contents)
1198 * \param share_list another context to share display lists with or NULL
1199 * \param driverFunctions points to the dd_function_table into which the
1200 * driver has plugged in all its special functions.
1201 * \param driverCtx points to the device driver's private context state
1203 * \return pointer to a new __GLcontextRec or NULL if error.
1206 _mesa_create_context(const GLvisual
*visual
,
1207 GLcontext
*share_list
,
1208 const struct dd_function_table
*driverFunctions
,
1209 void *driverContext
)
1214 ASSERT(driverContext
);
1216 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
1220 if (_mesa_initialize_context(ctx
, visual
, share_list
,
1221 driverFunctions
, driverContext
)) {
1232 * Free the data associated with the given context.
1234 * But doesn't free the GLcontext struct itself.
1236 * \sa _mesa_initialize_context() and init_attrib_groups().
1239 _mesa_free_context_data( GLcontext
*ctx
)
1241 if (!_mesa_get_current_context()){
1242 /* No current context, but we may need one in order to delete
1243 * texture objs, etc. So temporarily bind the context now.
1245 _mesa_make_current(ctx
, NULL
, NULL
);
1248 /* unreference WinSysDraw/Read buffers */
1249 _mesa_unreference_framebuffer(&ctx
->WinSysDrawBuffer
);
1250 _mesa_unreference_framebuffer(&ctx
->WinSysReadBuffer
);
1251 _mesa_unreference_framebuffer(&ctx
->DrawBuffer
);
1252 _mesa_unreference_framebuffer(&ctx
->ReadBuffer
);
1254 _mesa_free_attrib_data(ctx
);
1255 _mesa_free_lighting_data( ctx
);
1256 _mesa_free_eval_data( ctx
);
1257 _mesa_free_texture_data( ctx
);
1258 _mesa_free_matrix_data( ctx
);
1259 _mesa_free_viewport_data( ctx
);
1260 _mesa_free_colortables_data( ctx
);
1261 _mesa_free_program_data(ctx
);
1262 _mesa_free_shader_state(ctx
);
1263 _mesa_free_query_data(ctx
);
1265 #if FEATURE_ARB_vertex_buffer_object
1266 _mesa_delete_buffer_object(ctx
, ctx
->Array
.NullBufferObj
);
1268 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
1270 /* free dispatch tables */
1271 _mesa_free(ctx
->Exec
);
1272 _mesa_free(ctx
->Save
);
1274 /* Shared context state (display lists, textures, etc) */
1275 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1276 ctx
->Shared
->RefCount
--;
1277 assert(ctx
->Shared
->RefCount
>= 0);
1278 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1279 if (ctx
->Shared
->RefCount
== 0) {
1280 /* free shared state */
1281 free_shared_state( ctx
, ctx
->Shared
);
1284 if (ctx
->Extensions
.String
)
1285 _mesa_free((void *) ctx
->Extensions
.String
);
1287 /* unbind the context if it's currently bound */
1288 if (ctx
== _mesa_get_current_context()) {
1289 _mesa_make_current(NULL
, NULL
, NULL
);
1295 * Destroy a GLcontext structure.
1297 * \param ctx GL context.
1299 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1302 _mesa_destroy_context( GLcontext
*ctx
)
1305 _mesa_free_context_data(ctx
);
1306 _mesa_free( (void *) ctx
);
1313 * Copy attribute groups from one context to another.
1315 * \param src source context
1316 * \param dst destination context
1317 * \param mask bitwise OR of GL_*_BIT flags
1319 * According to the bits specified in \p mask, copies the corresponding
1320 * attributes from \p src into \p dst. For many of the attributes a simple \c
1321 * memcpy is not enough due to the existence of internal pointers in their data
1325 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1327 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1329 dst
->Accum
= src
->Accum
;
1331 if (mask
& GL_COLOR_BUFFER_BIT
) {
1333 dst
->Color
= src
->Color
;
1335 if (mask
& GL_CURRENT_BIT
) {
1337 dst
->Current
= src
->Current
;
1339 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1341 dst
->Depth
= src
->Depth
;
1343 if (mask
& GL_ENABLE_BIT
) {
1346 if (mask
& GL_EVAL_BIT
) {
1348 dst
->Eval
= src
->Eval
;
1350 if (mask
& GL_FOG_BIT
) {
1352 dst
->Fog
= src
->Fog
;
1354 if (mask
& GL_HINT_BIT
) {
1356 dst
->Hint
= src
->Hint
;
1358 if (mask
& GL_LIGHTING_BIT
) {
1360 /* begin with memcpy */
1361 dst
->Light
= src
->Light
;
1362 /* fixup linked lists to prevent pointer insanity */
1363 make_empty_list( &(dst
->Light
.EnabledList
) );
1364 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1365 if (dst
->Light
.Light
[i
].Enabled
) {
1366 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1370 if (mask
& GL_LINE_BIT
) {
1372 dst
->Line
= src
->Line
;
1374 if (mask
& GL_LIST_BIT
) {
1376 dst
->List
= src
->List
;
1378 if (mask
& GL_PIXEL_MODE_BIT
) {
1380 dst
->Pixel
= src
->Pixel
;
1382 if (mask
& GL_POINT_BIT
) {
1384 dst
->Point
= src
->Point
;
1386 if (mask
& GL_POLYGON_BIT
) {
1388 dst
->Polygon
= src
->Polygon
;
1390 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1391 /* Use loop instead of MEMCPY due to problem with Portland Group's
1392 * C compiler. Reported by John Stone.
1395 for (i
= 0; i
< 32; i
++) {
1396 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1399 if (mask
& GL_SCISSOR_BIT
) {
1401 dst
->Scissor
= src
->Scissor
;
1403 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1405 dst
->Stencil
= src
->Stencil
;
1407 if (mask
& GL_TEXTURE_BIT
) {
1408 /* Cannot memcpy because of pointers */
1409 _mesa_copy_texture_state(src
, dst
);
1411 if (mask
& GL_TRANSFORM_BIT
) {
1413 dst
->Transform
= src
->Transform
;
1415 if (mask
& GL_VIEWPORT_BIT
) {
1416 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1417 dst
->Viewport
.X
= src
->Viewport
.X
;
1418 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1419 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1420 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1421 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1422 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1423 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1426 /* XXX FIXME: Call callbacks?
1428 dst
->NewState
= _NEW_ALL
;
1434 * Check if the given context can render into the given framebuffer
1435 * by checking visual attributes.
1437 * Most of these tests could go away because Mesa is now pretty flexible
1438 * in terms of mixing rendering contexts with framebuffers. As long
1439 * as RGB vs. CI mode agree, we're probably good.
1441 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1444 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1446 const GLvisual
*ctxvis
= &ctx
->Visual
;
1447 const GLvisual
*bufvis
= &buffer
->Visual
;
1449 if (ctxvis
== bufvis
)
1452 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1455 /* disabling this fixes the fgl_glxgears pbuffer demo */
1456 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1459 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1461 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1463 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1465 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1467 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1469 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1471 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1474 /* disabled (see bug 11161) */
1475 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1478 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1486 * Do one-time initialization for the given framebuffer. Specifically,
1487 * ask the driver for the window's current size and update the framebuffer
1489 * Really, the device driver should totally take care of this.
1492 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1494 GLuint width
, height
;
1495 if (ctx
->Driver
.GetBufferSize
) {
1496 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1497 if (ctx
->Driver
.ResizeBuffers
)
1498 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1499 fb
->Initialized
= GL_TRUE
;
1505 * Bind the given context to the given drawBuffer and readBuffer and
1506 * make it the current context for the calling thread.
1507 * We'll render into the drawBuffer and read pixels from the
1508 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1510 * We check that the context's and framebuffer's visuals are compatible
1511 * and return immediately if they're not.
1513 * \param newCtx the new GL context. If NULL then there will be no current GL
1515 * \param drawBuffer the drawing framebuffer
1516 * \param readBuffer the reading framebuffer
1519 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1520 GLframebuffer
*readBuffer
)
1522 if (MESA_VERBOSE
& VERBOSE_API
)
1523 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1525 /* Check that the context's and framebuffer's visuals are compatible.
1527 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1528 if (!check_compatible(newCtx
, drawBuffer
)) {
1529 _mesa_warning(newCtx
,
1530 "MakeCurrent: incompatible visuals for context and drawbuffer");
1534 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1535 if (!check_compatible(newCtx
, readBuffer
)) {
1536 _mesa_warning(newCtx
,
1537 "MakeCurrent: incompatible visuals for context and readbuffer");
1542 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1543 _glapi_set_context((void *) newCtx
);
1544 ASSERT(_mesa_get_current_context() == newCtx
);
1547 _glapi_set_dispatch(NULL
); /* none current */
1550 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1552 if (drawBuffer
&& readBuffer
) {
1553 /* TODO: check if newCtx and buffer's visual match??? */
1555 ASSERT(drawBuffer
->Name
== 0);
1556 ASSERT(readBuffer
->Name
== 0);
1557 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1558 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1561 * Only set the context's Draw/ReadBuffer fields if they're NULL
1562 * or not bound to a user-created FBO.
1564 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1565 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1567 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1568 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1571 /* XXX only set this flag if we're really changing the draw/read
1572 * framebuffer bindings.
1574 newCtx
->NewState
|= _NEW_BUFFERS
;
1577 /* We want to get rid of these lines: */
1580 if (!drawBuffer
->Initialized
) {
1581 initialize_framebuffer_size(newCtx
, drawBuffer
);
1583 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1584 initialize_framebuffer_size(newCtx
, readBuffer
);
1587 _mesa_resizebuffers(newCtx
);
1591 /* We want the drawBuffer and readBuffer to be initialized by
1593 * This generally means the Width and Height match the actual
1594 * window size and the renderbuffers (both hardware and software
1595 * based) are allocated to match. The later can generally be
1596 * done with a call to _mesa_resize_framebuffer().
1598 * It's theoretically possible for a buffer to have zero width
1599 * or height, but for now, assert check that the driver did what's
1602 ASSERT(drawBuffer
->Width
> 0);
1603 ASSERT(drawBuffer
->Height
> 0);
1606 if (newCtx
->FirstTimeCurrent
) {
1607 /* set initial viewport and scissor size now */
1608 _mesa_set_viewport(newCtx
, 0, 0,
1609 drawBuffer
->Width
, drawBuffer
->Height
);
1610 _mesa_set_scissor(newCtx
, 0, 0,
1611 drawBuffer
->Width
, drawBuffer
->Height
);
1612 check_context_limits(newCtx
);
1616 /* We can use this to help debug user's problems. Tell them to set
1617 * the MESA_INFO env variable before running their app. Then the
1618 * first time each context is made current we'll print some useful
1621 if (newCtx
->FirstTimeCurrent
) {
1622 if (_mesa_getenv("MESA_INFO")) {
1625 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1632 * Make context 'ctx' share the display lists, textures and programs
1633 * that are associated with 'ctxToShare'.
1634 * Any display lists, textures or programs associated with 'ctx' will
1635 * be deleted if nobody else is sharing them.
1638 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1640 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1641 struct gl_shared_state
*oldSharedState
= ctx
->Shared
;
1643 ctx
->Shared
= ctxToShare
->Shared
;
1644 ctx
->Shared
->RefCount
++;
1646 update_default_objects(ctx
);
1648 oldSharedState
->RefCount
--;
1649 if (oldSharedState
->RefCount
== 0) {
1650 free_shared_state(ctx
, oldSharedState
);
1663 * \return pointer to the current GL context for this thread.
1665 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1666 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1670 _mesa_get_current_context( void )
1672 return (GLcontext
*) _glapi_get_context();
1677 * Get context's current API dispatch table.
1679 * It'll either be the immediate-mode execute dispatcher or the display list
1680 * compile dispatcher.
1682 * \param ctx GL context.
1684 * \return pointer to dispatch_table.
1686 * Simply returns __GLcontextRec::CurrentDispatch.
1688 struct _glapi_table
*
1689 _mesa_get_dispatch(GLcontext
*ctx
)
1691 return ctx
->CurrentDispatch
;
1697 /**********************************************************************/
1698 /** \name Miscellaneous functions */
1699 /**********************************************************************/
1705 * \param ctx GL context.
1706 * \param error error code.
1708 * Records the given error code and call the driver's dd_function_table::Error
1709 * function if defined.
1712 * This is called via _mesa_error().
1715 _mesa_record_error(GLcontext
*ctx
, GLenum error
)
1720 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1721 ctx
->ErrorValue
= error
;
1724 /* Call device driver's error handler, if any. This is used on the Mac. */
1725 if (ctx
->Driver
.Error
) {
1726 ctx
->Driver
.Error(ctx
);
1732 * Execute glFinish().
1734 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1735 * dd_function_table::Finish driver callback, if not NULL.
1740 GET_CURRENT_CONTEXT(ctx
);
1741 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1742 if (ctx
->Driver
.Finish
) {
1743 ctx
->Driver
.Finish(ctx
);
1749 * Execute glFlush().
1751 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1752 * dd_function_table::Flush driver callback, if not NULL.
1757 GET_CURRENT_CONTEXT(ctx
);
1758 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1759 if (ctx
->Driver
.Flush
) {
1760 ctx
->Driver
.Flush(ctx
);