2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Mesa context/visual/framebuffer management functions.
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.
80 #include "mfeatures.h"
87 #if FEATURE_attrib_stack
92 #include "bufferobj.h"
93 #if FEATURE_colortable
103 #if FEATURE_evaluators
107 #include "extensions.h"
108 #include "fbobject.h"
110 #include "feedback.h"
113 #include "framebuffer.h"
115 #if FEATURE_histogram
116 #include "histogram.h"
124 #include "multisample.h"
126 #include "pixelstore.h"
129 #if FEATURE_ARB_occlusion_query
130 #include "queryobj.h"
140 #include "simple_list.h"
143 #include "texcompress.h"
144 #include "teximage.h"
146 #include "texstate.h"
150 #include "viewport.h"
152 #include "glapi/glthread.h"
153 #include "glapi/glapioffsets.h"
154 #include "glapi/glapitable.h"
155 #include "shader/program.h"
156 #include "shader/prog_print.h"
157 #include "shader/shader_api.h"
158 #if FEATURE_ATI_fragment_shader
159 #include "shader/atifragshader.h"
162 #include "math/m_matrix.h"
166 #include "sparc/sparc.h"
170 int MESA_VERBOSE
= 0;
173 #ifndef MESA_DEBUG_FLAGS
174 int MESA_DEBUG_FLAGS
= 0;
178 /* ubyte -> float conversion */
179 GLfloat _mesa_ubyte_to_float_color_tab
[256];
184 * Swap buffers notification callback.
186 * \param ctx GL context.
188 * Called by window system just before swapping buffers.
189 * We have to finish any pending rendering.
192 _mesa_notifySwapBuffers(__GLcontext
*ctx
)
194 FLUSH_CURRENT( ctx
, 0 );
195 if (ctx
->Driver
.Flush
) {
196 ctx
->Driver
.Flush(ctx
);
201 /**********************************************************************/
202 /** \name GL Visual allocation/destruction */
203 /**********************************************************************/
207 * Allocates a GLvisual structure and initializes it via
208 * _mesa_initialize_visual().
210 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
211 * \param dbFlag double buffering
212 * \param stereoFlag stereo buffer
213 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
214 * is acceptable but the actual depth type will be GLushort or GLuint as
216 * \param stencilBits requested minimum bits per stencil buffer value
217 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
218 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
219 * \param redBits number of bits per color component in frame buffer for RGB(A)
220 * mode. We always use 8 in core Mesa though.
221 * \param greenBits same as above.
222 * \param blueBits same as above.
223 * \param alphaBits same as above.
224 * \param numSamples not really used.
226 * \return pointer to new GLvisual or NULL if requested parameters can't be
229 * \note Need to add params for level and numAuxBuffers (at least)
232 _mesa_create_visual( GLboolean rgbFlag
,
234 GLboolean stereoFlag
,
243 GLint accumGreenBits
,
245 GLint accumAlphaBits
,
248 GLvisual
*vis
= (GLvisual
*) _mesa_calloc(sizeof(GLvisual
));
250 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
251 redBits
, greenBits
, blueBits
, alphaBits
,
252 indexBits
, depthBits
, stencilBits
,
253 accumRedBits
, accumGreenBits
,
254 accumBlueBits
, accumAlphaBits
,
264 * Makes some sanity checks and fills in the fields of the
265 * GLvisual object with the given parameters. If the caller needs
266 * to set additional fields, he should just probably init the whole GLvisual
268 * \return GL_TRUE on success, or GL_FALSE on failure.
270 * \sa _mesa_create_visual() above for the parameter description.
273 _mesa_initialize_visual( GLvisual
*vis
,
276 GLboolean stereoFlag
,
285 GLint accumGreenBits
,
287 GLint accumAlphaBits
,
292 if (depthBits
< 0 || depthBits
> 32) {
295 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
298 assert(accumRedBits
>= 0);
299 assert(accumGreenBits
>= 0);
300 assert(accumBlueBits
>= 0);
301 assert(accumAlphaBits
>= 0);
303 vis
->rgbMode
= rgbFlag
;
304 vis
->doubleBufferMode
= dbFlag
;
305 vis
->stereoMode
= stereoFlag
;
307 vis
->redBits
= redBits
;
308 vis
->greenBits
= greenBits
;
309 vis
->blueBits
= blueBits
;
310 vis
->alphaBits
= alphaBits
;
311 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
313 vis
->indexBits
= indexBits
;
314 vis
->depthBits
= depthBits
;
315 vis
->stencilBits
= stencilBits
;
317 vis
->accumRedBits
= accumRedBits
;
318 vis
->accumGreenBits
= accumGreenBits
;
319 vis
->accumBlueBits
= accumBlueBits
;
320 vis
->accumAlphaBits
= accumAlphaBits
;
322 vis
->haveAccumBuffer
= accumRedBits
> 0;
323 vis
->haveDepthBuffer
= depthBits
> 0;
324 vis
->haveStencilBuffer
= stencilBits
> 0;
326 vis
->numAuxBuffers
= 0;
329 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
330 vis
->samples
= numSamples
;
337 * Destroy a visual and free its memory.
341 * Frees the visual structure.
344 _mesa_destroy_visual( GLvisual
*vis
)
352 /**********************************************************************/
353 /** \name Context allocation, initialization, destroying
355 * The purpose of the most initialization functions here is to provide the
356 * default state values according to the OpenGL specification.
358 /**********************************************************************/
363 * This is lame. gdb only seems to recognize enum types that are
364 * actually used somewhere. We want to be able to print/use enum
365 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
366 * the gl_texture_index type anywhere. Thus, this lame function.
369 dummy_enum_func(void)
372 gl_colortable_index ci
;
392 * One-time initialization mutex lock.
394 * \sa Used by one_time_init().
396 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
399 * Calls all the various one-time-init functions in Mesa.
401 * While holding a global mutex lock, calls several initialization functions,
402 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
408 one_time_init( GLcontext
*ctx
)
410 static GLboolean alreadyCalled
= GL_FALSE
;
412 _glthread_LOCK_MUTEX(OneTimeLock
);
413 if (!alreadyCalled
) {
416 /* do some implementation tests */
417 assert( sizeof(GLbyte
) == 1 );
418 assert( sizeof(GLubyte
) == 1 );
419 assert( sizeof(GLshort
) == 2 );
420 assert( sizeof(GLushort
) == 2 );
421 assert( sizeof(GLint
) == 4 );
422 assert( sizeof(GLuint
) == 4 );
424 _mesa_get_cpu_features();
426 _mesa_init_sqrt_table();
428 for (i
= 0; i
< 256; i
++) {
429 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
432 if (_mesa_getenv("MESA_DEBUG")) {
433 _glapi_noop_enable_warnings(GL_TRUE
);
434 _glapi_set_warning_func( (_glapi_warning_func
) _mesa_warning
);
437 _glapi_noop_enable_warnings(GL_FALSE
);
440 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
441 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
442 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
445 alreadyCalled
= GL_TRUE
;
447 _glthread_UNLOCK_MUTEX(OneTimeLock
);
454 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
457 _mesa_init_current(GLcontext
*ctx
)
461 /* Init all to (0,0,0,1) */
462 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
463 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
466 /* redo special cases: */
467 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
468 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
469 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
470 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
471 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
472 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
477 * Init vertex/fragment program limits.
478 * Important: drivers should override these with actual limits.
481 init_program_limits(GLenum type
, struct gl_program_constants
*prog
)
483 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
484 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
485 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
486 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
487 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
488 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
489 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
490 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
492 if (type
== GL_VERTEX_PROGRAM_ARB
) {
493 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
494 prog
->MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
495 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
498 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
499 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
500 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
503 /* Set the native limits to zero. This implies that there is no native
504 * support for shaders. Let the drivers fill in the actual values.
506 prog
->MaxNativeInstructions
= 0;
507 prog
->MaxNativeAluInstructions
= 0;
508 prog
->MaxNativeTexInstructions
= 0;
509 prog
->MaxNativeTexIndirections
= 0;
510 prog
->MaxNativeAttribs
= 0;
511 prog
->MaxNativeTemps
= 0;
512 prog
->MaxNativeAddressRegs
= 0;
513 prog
->MaxNativeParameters
= 0;
518 * Initialize fields of gl_constants (aka ctx->Const.*).
519 * Use defaults from config.h. The device drivers will often override
520 * some of these values (such as number of texture units).
523 _mesa_init_constants(GLcontext
*ctx
)
527 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
528 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
530 /* Max texture size should be <= max viewport size (render to texture) */
531 assert((1 << (MAX_TEXTURE_LEVELS
- 1)) <= MAX_WIDTH
);
533 /* Constants, may be overriden (usually only reduced) by device drivers */
534 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
535 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
536 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
537 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
538 ctx
->Const
.MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
539 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
540 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
541 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
542 ctx
->Const
.MaxTextureImageUnits
);
543 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
544 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
545 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
546 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
547 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
548 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
549 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
550 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
551 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
552 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
553 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
554 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
555 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
556 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
557 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
558 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
559 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
560 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
561 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
562 ctx
->Const
.MaxShininess
= 128.0;
563 ctx
->Const
.MaxSpotExponent
= 128.0;
564 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
565 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
566 #if FEATURE_ARB_vertex_program
567 init_program_limits(GL_VERTEX_PROGRAM_ARB
, &ctx
->Const
.VertexProgram
);
569 #if FEATURE_ARB_fragment_program
570 init_program_limits(GL_FRAGMENT_PROGRAM_ARB
, &ctx
->Const
.FragmentProgram
);
572 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
573 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
575 /* CheckArrayBounds is overriden by drivers/x11 for X server */
576 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
578 /* GL_ARB_draw_buffers */
579 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
581 /* GL_OES_read_format */
582 ctx
->Const
.ColorReadFormat
= GL_RGBA
;
583 ctx
->Const
.ColorReadType
= GL_UNSIGNED_BYTE
;
585 #if FEATURE_EXT_framebuffer_object
586 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
587 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
590 #if FEATURE_ARB_vertex_shader
591 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
592 ctx
->Const
.MaxVarying
= MAX_VARYING
;
595 /* GL_ARB_framebuffer_object */
596 ctx
->Const
.MaxSamples
= 0;
599 ctx
->Const
.MaxServerWaitTimeout
= (GLuint64
) ~0;
601 /* GL_ATI_envmap_bumpmap */
602 ctx
->Const
.SupportedBumpUnits
= SUPPORTED_ATI_BUMP_UNITS
;
604 /* GL_EXT_provoking_vertex */
605 ctx
->Const
.QuadsFollowProvokingVertexConvention
= GL_TRUE
;
608 ASSERT(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
609 ctx
->Const
.MaxTextureCoordUnits
));
610 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
611 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
613 ASSERT(MAX_NV_FRAGMENT_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
614 ASSERT(MAX_NV_VERTEX_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
615 ASSERT(MAX_NV_VERTEX_PROGRAM_INPUTS
<= VERT_ATTRIB_MAX
);
616 ASSERT(MAX_NV_VERTEX_PROGRAM_OUTPUTS
<= VERT_RESULT_MAX
);
618 /* check that we don't exceed various 32-bit bitfields */
619 ASSERT(VERT_RESULT_MAX
<= 32);
620 ASSERT(FRAG_ATTRIB_MAX
<= 32);
625 * Do some sanity checks on the limits/constants for the given context.
626 * Only called the first time a context is bound.
629 check_context_limits(GLcontext
*ctx
)
631 /* Many context limits/constants are limited by the size of
634 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
635 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
636 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
637 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
639 /* number of coord units cannot be greater than number of image units */
640 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.MaxTextureImageUnits
);
642 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
643 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
644 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
645 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
647 /* make sure largest texture image is <= MAX_WIDTH in size */
648 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= MAX_WIDTH
);
649 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= MAX_WIDTH
);
650 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= MAX_WIDTH
);
652 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
653 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
655 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
657 /* XXX probably add more tests */
662 * Initialize the attribute groups in a GL context.
664 * \param ctx GL context.
666 * Initializes all the attributes, calling the respective <tt>init*</tt>
667 * functions for the more complex data structures.
670 init_attrib_groups(GLcontext
*ctx
)
675 _mesa_init_constants( ctx
);
678 _mesa_init_extensions( ctx
);
680 /* Attribute Groups */
682 _mesa_init_accum( ctx
);
684 #if FEATURE_attrib_stack
685 _mesa_init_attrib( ctx
);
687 _mesa_init_buffer_objects( ctx
);
688 _mesa_init_color( ctx
);
689 #if FEATURE_colortable
690 _mesa_init_colortables( ctx
);
692 _mesa_init_current( ctx
);
693 _mesa_init_depth( ctx
);
694 _mesa_init_debug( ctx
);
696 _mesa_init_display_list( ctx
);
698 #if FEATURE_evaluators
699 _mesa_init_eval( ctx
);
701 _mesa_init_fbobjects( ctx
);
703 _mesa_init_feedback( ctx
);
705 ctx
->RenderMode
= GL_RENDER
;
707 _mesa_init_fog( ctx
);
708 #if FEATURE_histogram
709 _mesa_init_histogram( ctx
);
711 _mesa_init_hint( ctx
);
712 _mesa_init_line( ctx
);
713 _mesa_init_lighting( ctx
);
714 _mesa_init_matrix( ctx
);
715 _mesa_init_multisample( ctx
);
716 _mesa_init_pixel( ctx
);
717 _mesa_init_pixelstore( ctx
);
718 _mesa_init_point( ctx
);
719 _mesa_init_polygon( ctx
);
720 _mesa_init_program( ctx
);
721 #if FEATURE_ARB_occlusion_query
722 _mesa_init_query( ctx
);
725 _mesa_init_sync( ctx
);
728 _mesa_init_rastpos( ctx
);
730 _mesa_init_scissor( ctx
);
731 _mesa_init_shader_state( ctx
);
732 _mesa_init_stencil( ctx
);
733 _mesa_init_transform( ctx
);
734 _mesa_init_varray( ctx
);
735 _mesa_init_viewport( ctx
);
737 if (!_mesa_init_texture( ctx
))
740 #if FEATURE_texture_s3tc
741 _mesa_init_texture_s3tc( ctx
);
743 #if FEATURE_texture_fxt1
744 _mesa_init_texture_fxt1( ctx
);
748 ctx
->NewState
= _NEW_ALL
;
749 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
750 ctx
->varying_vp_inputs
= ~0;
757 * Update default objects in a GL context with respect to shared state.
759 * \param ctx GL context.
761 * Removes references to old default objects, (texture objects, program
762 * objects, etc.) and changes to reference those from the current shared
766 update_default_objects(GLcontext
*ctx
)
770 _mesa_update_default_objects_program(ctx
);
771 _mesa_update_default_objects_texture(ctx
);
772 _mesa_update_default_objects_buffer_objects(ctx
);
779 * This is the default function we plug into all dispatch table slots
780 * This helps prevents a segfault when someone calls a GL function without
781 * first checking if the extension's supported.
786 _mesa_warning(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
792 * Allocate and initialize a new dispatch table.
794 static struct _glapi_table
*
795 alloc_dispatch_table(void)
797 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
798 * In practice, this'll be the same for stand-alone Mesa. But for DRI
799 * Mesa we do this to accomodate different versions of libGL and various
802 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
803 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
804 struct _glapi_table
*table
=
805 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
807 _glapi_proc
*entry
= (_glapi_proc
*) table
;
809 for (i
= 0; i
< numEntries
; i
++) {
810 entry
[i
] = (_glapi_proc
) generic_nop
;
818 * Initialize a GLcontext struct (rendering context).
820 * This includes allocating all the other structs and arrays which hang off of
821 * the context by pointers.
822 * Note that the driver needs to pass in its dd_function_table here since
823 * we need to at least call driverFunctions->NewTextureObject to create the
824 * default texture objects.
826 * Called by _mesa_create_context().
828 * Performs the imports and exports callback tables initialization, and
829 * miscellaneous one-time initializations. If no shared context is supplied one
830 * is allocated, and increase its reference count. Setups the GL API dispatch
831 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
832 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
835 * \param ctx the context to initialize
836 * \param visual describes the visual attributes for this context
837 * \param share_list points to context to share textures, display lists,
839 * \param driverFunctions table of device driver functions for this context
841 * \param driverContext pointer to driver-specific context data
844 _mesa_initialize_context(GLcontext
*ctx
,
845 const GLvisual
*visual
,
846 GLcontext
*share_list
,
847 const struct dd_function_table
*driverFunctions
,
850 struct gl_shared_state
*shared
;
852 /*ASSERT(driverContext);*/
853 assert(driverFunctions
->NewTextureObject
);
854 assert(driverFunctions
->FreeTexImageData
);
856 /* misc one-time initializations */
859 ctx
->Visual
= *visual
;
860 ctx
->DrawBuffer
= NULL
;
861 ctx
->ReadBuffer
= NULL
;
862 ctx
->WinSysDrawBuffer
= NULL
;
863 ctx
->WinSysReadBuffer
= NULL
;
865 /* Plug in driver functions and context pointer here.
866 * This is important because when we call alloc_shared_state() below
867 * we'll call ctx->Driver.NewTextureObject() to create the default
870 ctx
->Driver
= *driverFunctions
;
871 ctx
->DriverCtx
= driverContext
;
874 /* share state with another context */
875 shared
= share_list
->Shared
;
878 /* allocate new, unshared state */
879 shared
= _mesa_alloc_shared_state(ctx
);
884 _glthread_LOCK_MUTEX(shared
->Mutex
);
885 ctx
->Shared
= shared
;
887 _glthread_UNLOCK_MUTEX(shared
->Mutex
);
889 if (!init_attrib_groups( ctx
)) {
890 _mesa_free_shared_state(ctx
, ctx
->Shared
);
894 /* setup the API dispatch tables */
895 ctx
->Exec
= alloc_dispatch_table();
896 ctx
->Save
= alloc_dispatch_table();
897 if (!ctx
->Exec
|| !ctx
->Save
) {
898 _mesa_free_shared_state(ctx
, ctx
->Shared
);
900 _mesa_free(ctx
->Exec
);
903 _mesa_init_exec_table(ctx
->Exec
);
905 ctx
->CurrentDispatch
= ctx
->Exec
;
907 _mesa_init_dlist_table(ctx
->Save
);
908 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
910 /* Neutral tnl module stuff */
911 _mesa_init_exec_vtxfmt( ctx
);
912 ctx
->TnlModule
.Current
= NULL
;
913 ctx
->TnlModule
.SwapCount
= 0;
915 ctx
->FragmentProgram
._MaintainTexEnvProgram
916 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
918 ctx
->VertexProgram
._MaintainTnlProgram
919 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
920 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
921 /* this is required... */
922 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
925 #ifdef FEATURE_extra_context_init
926 _mesa_initialize_context_extra(ctx
);
929 ctx
->FirstTimeCurrent
= GL_TRUE
;
936 * Allocate and initialize a GLcontext structure.
937 * Note that the driver needs to pass in its dd_function_table here since
938 * we need to at least call driverFunctions->NewTextureObject to initialize
939 * the rendering context.
941 * \param visual a GLvisual pointer (we copy the struct contents)
942 * \param share_list another context to share display lists with or NULL
943 * \param driverFunctions points to the dd_function_table into which the
944 * driver has plugged in all its special functions.
945 * \param driverContext points to the device driver's private context state
947 * \return pointer to a new __GLcontextRec or NULL if error.
950 _mesa_create_context(const GLvisual
*visual
,
951 GLcontext
*share_list
,
952 const struct dd_function_table
*driverFunctions
,
958 /*ASSERT(driverContext);*/
960 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
964 if (_mesa_initialize_context(ctx
, visual
, share_list
,
965 driverFunctions
, driverContext
)) {
976 * Free the data associated with the given context.
978 * But doesn't free the GLcontext struct itself.
980 * \sa _mesa_initialize_context() and init_attrib_groups().
983 _mesa_free_context_data( GLcontext
*ctx
)
987 if (!_mesa_get_current_context()){
988 /* No current context, but we may need one in order to delete
989 * texture objs, etc. So temporarily bind the context now.
991 _mesa_make_current(ctx
, NULL
, NULL
);
994 /* unreference WinSysDraw/Read buffers */
995 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
996 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
997 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
998 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1000 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1001 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1002 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1004 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1005 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1006 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1008 #if FEATURE_attrib_stack
1009 _mesa_free_attrib_data(ctx
);
1011 _mesa_free_lighting_data( ctx
);
1012 #if FEATURE_evaluators
1013 _mesa_free_eval_data( ctx
);
1015 _mesa_free_texture_data( ctx
);
1016 _mesa_free_matrix_data( ctx
);
1017 _mesa_free_viewport_data( ctx
);
1018 #if FEATURE_colortable
1019 _mesa_free_colortables_data( ctx
);
1021 _mesa_free_program_data(ctx
);
1022 _mesa_free_shader_state(ctx
);
1023 #if FEATURE_ARB_occlusion_query
1024 _mesa_free_query_data(ctx
);
1026 #if FEATURE_ARB_sync
1027 _mesa_free_sync_data(ctx
);
1029 _mesa_free_varray_data(ctx
);
1031 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
1033 #if FEATURE_ARB_pixel_buffer_object
1034 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1035 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1038 #if FEATURE_ARB_vertex_buffer_object
1039 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1040 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ElementArrayBufferObj
, NULL
);
1043 /* free dispatch tables */
1044 _mesa_free(ctx
->Exec
);
1045 _mesa_free(ctx
->Save
);
1047 /* Shared context state (display lists, textures, etc) */
1048 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1049 RefCount
= --ctx
->Shared
->RefCount
;
1050 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1051 assert(RefCount
>= 0);
1052 if (RefCount
== 0) {
1053 /* free shared state */
1054 _mesa_free_shared_state( ctx
, ctx
->Shared
);
1057 if (ctx
->Extensions
.String
)
1058 _mesa_free((void *) ctx
->Extensions
.String
);
1060 /* unbind the context if it's currently bound */
1061 if (ctx
== _mesa_get_current_context()) {
1062 _mesa_make_current(NULL
, NULL
, NULL
);
1068 * Destroy a GLcontext structure.
1070 * \param ctx GL context.
1072 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1075 _mesa_destroy_context( GLcontext
*ctx
)
1078 _mesa_free_context_data(ctx
);
1079 _mesa_free( (void *) ctx
);
1086 * Copy attribute groups from one context to another.
1088 * \param src source context
1089 * \param dst destination context
1090 * \param mask bitwise OR of GL_*_BIT flags
1092 * According to the bits specified in \p mask, copies the corresponding
1093 * attributes from \p src into \p dst. For many of the attributes a simple \c
1094 * memcpy is not enough due to the existence of internal pointers in their data
1098 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1100 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1102 dst
->Accum
= src
->Accum
;
1104 if (mask
& GL_COLOR_BUFFER_BIT
) {
1106 dst
->Color
= src
->Color
;
1108 if (mask
& GL_CURRENT_BIT
) {
1110 dst
->Current
= src
->Current
;
1112 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1114 dst
->Depth
= src
->Depth
;
1116 if (mask
& GL_ENABLE_BIT
) {
1119 if (mask
& GL_EVAL_BIT
) {
1121 dst
->Eval
= src
->Eval
;
1123 if (mask
& GL_FOG_BIT
) {
1125 dst
->Fog
= src
->Fog
;
1127 if (mask
& GL_HINT_BIT
) {
1129 dst
->Hint
= src
->Hint
;
1131 if (mask
& GL_LIGHTING_BIT
) {
1133 /* begin with memcpy */
1134 dst
->Light
= src
->Light
;
1135 /* fixup linked lists to prevent pointer insanity */
1136 make_empty_list( &(dst
->Light
.EnabledList
) );
1137 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1138 if (dst
->Light
.Light
[i
].Enabled
) {
1139 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1143 if (mask
& GL_LINE_BIT
) {
1145 dst
->Line
= src
->Line
;
1147 if (mask
& GL_LIST_BIT
) {
1149 dst
->List
= src
->List
;
1151 if (mask
& GL_PIXEL_MODE_BIT
) {
1153 dst
->Pixel
= src
->Pixel
;
1155 if (mask
& GL_POINT_BIT
) {
1157 dst
->Point
= src
->Point
;
1159 if (mask
& GL_POLYGON_BIT
) {
1161 dst
->Polygon
= src
->Polygon
;
1163 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1164 /* Use loop instead of MEMCPY due to problem with Portland Group's
1165 * C compiler. Reported by John Stone.
1168 for (i
= 0; i
< 32; i
++) {
1169 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1172 if (mask
& GL_SCISSOR_BIT
) {
1174 dst
->Scissor
= src
->Scissor
;
1176 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1178 dst
->Stencil
= src
->Stencil
;
1180 if (mask
& GL_TEXTURE_BIT
) {
1181 /* Cannot memcpy because of pointers */
1182 _mesa_copy_texture_state(src
, dst
);
1184 if (mask
& GL_TRANSFORM_BIT
) {
1186 dst
->Transform
= src
->Transform
;
1188 if (mask
& GL_VIEWPORT_BIT
) {
1189 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1190 dst
->Viewport
.X
= src
->Viewport
.X
;
1191 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1192 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1193 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1194 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1195 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1196 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1199 /* XXX FIXME: Call callbacks?
1201 dst
->NewState
= _NEW_ALL
;
1207 * Check if the given context can render into the given framebuffer
1208 * by checking visual attributes.
1210 * Most of these tests could go away because Mesa is now pretty flexible
1211 * in terms of mixing rendering contexts with framebuffers. As long
1212 * as RGB vs. CI mode agree, we're probably good.
1214 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1217 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1219 const GLvisual
*ctxvis
= &ctx
->Visual
;
1220 const GLvisual
*bufvis
= &buffer
->Visual
;
1222 if (ctxvis
== bufvis
)
1225 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1228 /* disabling this fixes the fgl_glxgears pbuffer demo */
1229 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1232 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1234 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1236 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1238 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1240 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1242 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1244 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1247 /* disabled (see bug 11161) */
1248 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1251 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1259 * Do one-time initialization for the given framebuffer. Specifically,
1260 * ask the driver for the window's current size and update the framebuffer
1262 * Really, the device driver should totally take care of this.
1265 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1267 GLuint width
, height
;
1268 if (ctx
->Driver
.GetBufferSize
) {
1269 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1270 if (ctx
->Driver
.ResizeBuffers
)
1271 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1272 fb
->Initialized
= GL_TRUE
;
1278 * Check if the viewport/scissor size has not yet been initialized.
1279 * Initialize the size if the given width and height are non-zero.
1282 _mesa_check_init_viewport(GLcontext
*ctx
, GLuint width
, GLuint height
)
1284 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1285 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1286 * potential infinite recursion.
1288 ctx
->ViewportInitialized
= GL_TRUE
;
1289 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
1290 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
1296 * Bind the given context to the given drawBuffer and readBuffer and
1297 * make it the current context for the calling thread.
1298 * We'll render into the drawBuffer and read pixels from the
1299 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1301 * We check that the context's and framebuffer's visuals are compatible
1302 * and return immediately if they're not.
1304 * \param newCtx the new GL context. If NULL then there will be no current GL
1306 * \param drawBuffer the drawing framebuffer
1307 * \param readBuffer the reading framebuffer
1310 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1311 GLframebuffer
*readBuffer
)
1313 if (MESA_VERBOSE
& VERBOSE_API
)
1314 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1316 /* Check that the context's and framebuffer's visuals are compatible.
1318 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1319 if (!check_compatible(newCtx
, drawBuffer
)) {
1320 _mesa_warning(newCtx
,
1321 "MakeCurrent: incompatible visuals for context and drawbuffer");
1325 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1326 if (!check_compatible(newCtx
, readBuffer
)) {
1327 _mesa_warning(newCtx
,
1328 "MakeCurrent: incompatible visuals for context and readbuffer");
1333 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1334 _glapi_set_context((void *) newCtx
);
1335 ASSERT(_mesa_get_current_context() == newCtx
);
1338 _glapi_set_dispatch(NULL
); /* none current */
1341 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1343 if (drawBuffer
&& readBuffer
) {
1344 /* TODO: check if newCtx and buffer's visual match??? */
1346 ASSERT(drawBuffer
->Name
== 0);
1347 ASSERT(readBuffer
->Name
== 0);
1348 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1349 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1352 * Only set the context's Draw/ReadBuffer fields if they're NULL
1353 * or not bound to a user-created FBO.
1355 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1356 /* KW: merge conflict here, revisit.
1358 /* fix up the fb fields - these will end up wrong otherwise
1359 * if the DRIdrawable changes, and everything relies on them.
1360 * This is a bit messy (same as needed in _mesa_BindFramebufferEXT)
1363 GLenum buffers
[MAX_DRAW_BUFFERS
];
1365 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1367 for(i
= 0; i
< newCtx
->Const
.MaxDrawBuffers
; i
++) {
1368 buffers
[i
] = newCtx
->Color
.DrawBuffer
[i
];
1371 _mesa_drawbuffers(newCtx
, newCtx
->Const
.MaxDrawBuffers
, buffers
, NULL
);
1373 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1374 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1377 /* XXX only set this flag if we're really changing the draw/read
1378 * framebuffer bindings.
1380 newCtx
->NewState
|= _NEW_BUFFERS
;
1383 /* We want to get rid of these lines: */
1386 if (!drawBuffer
->Initialized
) {
1387 initialize_framebuffer_size(newCtx
, drawBuffer
);
1389 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1390 initialize_framebuffer_size(newCtx
, readBuffer
);
1393 _mesa_resizebuffers(newCtx
);
1397 /* We want the drawBuffer and readBuffer to be initialized by
1399 * This generally means the Width and Height match the actual
1400 * window size and the renderbuffers (both hardware and software
1401 * based) are allocated to match. The later can generally be
1402 * done with a call to _mesa_resize_framebuffer().
1404 * It's theoretically possible for a buffer to have zero width
1405 * or height, but for now, assert check that the driver did what's
1408 ASSERT(drawBuffer
->Width
> 0);
1409 ASSERT(drawBuffer
->Height
> 0);
1413 _mesa_check_init_viewport(newCtx
,
1414 drawBuffer
->Width
, drawBuffer
->Height
);
1418 if (newCtx
->FirstTimeCurrent
) {
1419 check_context_limits(newCtx
);
1421 /* We can use this to help debug user's problems. Tell them to set
1422 * the MESA_INFO env variable before running their app. Then the
1423 * first time each context is made current we'll print some useful
1426 if (_mesa_getenv("MESA_INFO")) {
1430 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1439 * Make context 'ctx' share the display lists, textures and programs
1440 * that are associated with 'ctxToShare'.
1441 * Any display lists, textures or programs associated with 'ctx' will
1442 * be deleted if nobody else is sharing them.
1445 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1447 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1448 struct gl_shared_state
*oldSharedState
= ctx
->Shared
;
1451 ctx
->Shared
= ctxToShare
->Shared
;
1453 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1454 ctx
->Shared
->RefCount
++;
1455 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1457 update_default_objects(ctx
);
1459 _glthread_LOCK_MUTEX(oldSharedState
->Mutex
);
1460 RefCount
= --oldSharedState
->RefCount
;
1461 _glthread_UNLOCK_MUTEX(oldSharedState
->Mutex
);
1463 if (RefCount
== 0) {
1464 _mesa_free_shared_state(ctx
, oldSharedState
);
1477 * \return pointer to the current GL context for this thread.
1479 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1480 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1484 _mesa_get_current_context( void )
1486 return (GLcontext
*) _glapi_get_context();
1491 * Get context's current API dispatch table.
1493 * It'll either be the immediate-mode execute dispatcher or the display list
1494 * compile dispatcher.
1496 * \param ctx GL context.
1498 * \return pointer to dispatch_table.
1500 * Simply returns __GLcontextRec::CurrentDispatch.
1502 struct _glapi_table
*
1503 _mesa_get_dispatch(GLcontext
*ctx
)
1505 return ctx
->CurrentDispatch
;
1511 /**********************************************************************/
1512 /** \name Miscellaneous functions */
1513 /**********************************************************************/
1519 * \param ctx GL context.
1520 * \param error error code.
1522 * Records the given error code and call the driver's dd_function_table::Error
1523 * function if defined.
1526 * This is called via _mesa_error().
1529 _mesa_record_error(GLcontext
*ctx
, GLenum error
)
1534 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1535 ctx
->ErrorValue
= error
;
1538 /* Call device driver's error handler, if any. This is used on the Mac. */
1539 if (ctx
->Driver
.Error
) {
1540 ctx
->Driver
.Error(ctx
);
1546 * Execute glFinish().
1548 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1549 * dd_function_table::Finish driver callback, if not NULL.
1554 GET_CURRENT_CONTEXT(ctx
);
1555 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1556 FLUSH_CURRENT( ctx
, 0 );
1557 if (ctx
->Driver
.Finish
) {
1558 ctx
->Driver
.Finish(ctx
);
1564 * Execute glFlush().
1566 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1567 * dd_function_table::Flush driver callback, if not NULL.
1572 GET_CURRENT_CONTEXT(ctx
);
1573 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1574 FLUSH_CURRENT( ctx
, 0 );
1575 if (ctx
->Driver
.Flush
) {
1576 ctx
->Driver
.Flush(ctx
);
1582 * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over
1583 * MUL/MAD, or vice versa, call this function to register that.
1584 * Otherwise we default to MUL/MAD.
1587 _mesa_set_mvp_with_dp4( GLcontext
*ctx
,
1590 ctx
->mvp_with_dp4
= flag
;
1596 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1597 * is called to see if it's valid to render. This involves checking that
1598 * the current shader is valid and the framebuffer is complete.
1599 * If an error is detected it'll be recorded here.
1600 * \return GL_TRUE if OK to render, GL_FALSE if not
1603 _mesa_valid_to_render(GLcontext
*ctx
, const char *where
)
1605 if (ctx
->Shader
.CurrentProgram
) {
1607 if (!ctx
->Shader
.CurrentProgram
->LinkStatus
) {
1608 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1609 "%s(shader not linked), where");
1612 #if 0 /* not normally enabled */
1615 if (!_mesa_validate_shader_program(ctx
, ctx
->Shader
.CurrentProgram
,
1617 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1618 ctx
->Shader
.CurrentProgram
->Name
, errMsg
);
1624 if (ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1625 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1626 "%s(vertex program not valid)", where
);
1629 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1630 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1631 "%s(fragment program not valid)", where
);
1636 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
1637 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
1638 "%s(incomplete framebuffer)", where
);
1643 if (ctx
->Shader
.Flags
& GLSL_LOG
) {
1644 struct gl_shader_program
*shProg
= ctx
->Shader
.CurrentProgram
;
1646 if (!shProg
->_Used
) {
1647 /* This is the first time this shader is being used.
1648 * Append shader's constants/uniforms to log file.
1651 for (i
= 0; i
< shProg
->NumShaders
; i
++) {
1652 struct gl_shader
*sh
= shProg
->Shaders
[i
];
1653 if (sh
->Type
== GL_VERTEX_SHADER
) {
1654 _mesa_append_uniforms_to_file(sh
,
1655 &shProg
->VertexProgram
->Base
);
1657 else if (sh
->Type
== GL_FRAGMENT_SHADER
) {
1658 _mesa_append_uniforms_to_file(sh
,
1659 &shProg
->FragmentProgram
->Base
);
1662 shProg
->_Used
= GL_TRUE
;