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"
88 #include "bufferobj.h"
97 #include "extensions.h"
101 #include "framebuffer.h"
103 #include "histogram.h"
110 #include "multisample.h"
112 #include "pixelstore.h"
115 #include "queryobj.h"
123 #include "simple_list.h"
126 #include "texcompress_s3tc.h"
127 #include "teximage.h"
129 #include "texstate.h"
133 #include "viewport.h"
135 #include "glapi/glthread.h"
136 #include "glapi/glapitable.h"
137 #include "shader/program.h"
138 #include "shader/prog_print.h"
139 #include "shader/shader_api.h"
140 #if FEATURE_ATI_fragment_shader
141 #include "shader/atifragshader.h"
144 #include "math/m_matrix.h"
148 #include "sparc/sparc.h"
152 int MESA_VERBOSE
= 0;
155 #ifndef MESA_DEBUG_FLAGS
156 int MESA_DEBUG_FLAGS
= 0;
160 /* ubyte -> float conversion */
161 GLfloat _mesa_ubyte_to_float_color_tab
[256];
166 * Swap buffers notification callback.
168 * \param ctx GL context.
170 * Called by window system just before swapping buffers.
171 * We have to finish any pending rendering.
174 _mesa_notifySwapBuffers(__GLcontext
*ctx
)
176 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
177 _mesa_debug(ctx
, "SwapBuffers\n");
178 FLUSH_CURRENT( ctx
, 0 );
179 if (ctx
->Driver
.Flush
) {
180 ctx
->Driver
.Flush(ctx
);
185 /**********************************************************************/
186 /** \name GL Visual allocation/destruction */
187 /**********************************************************************/
191 * Allocates a GLvisual structure and initializes it via
192 * _mesa_initialize_visual().
194 * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
195 * \param dbFlag double buffering
196 * \param stereoFlag stereo buffer
197 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
198 * is acceptable but the actual depth type will be GLushort or GLuint as
200 * \param stencilBits requested minimum bits per stencil buffer value
201 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
202 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
203 * \param redBits number of bits per color component in frame buffer for RGB(A)
204 * mode. We always use 8 in core Mesa though.
205 * \param greenBits same as above.
206 * \param blueBits same as above.
207 * \param alphaBits same as above.
208 * \param numSamples not really used.
210 * \return pointer to new GLvisual or NULL if requested parameters can't be
213 * \note Need to add params for level and numAuxBuffers (at least)
216 _mesa_create_visual( GLboolean rgbFlag
,
218 GLboolean stereoFlag
,
227 GLint accumGreenBits
,
229 GLint accumAlphaBits
,
232 GLvisual
*vis
= (GLvisual
*) _mesa_calloc(sizeof(GLvisual
));
234 if (!_mesa_initialize_visual(vis
, rgbFlag
, dbFlag
, stereoFlag
,
235 redBits
, greenBits
, blueBits
, alphaBits
,
236 indexBits
, depthBits
, stencilBits
,
237 accumRedBits
, accumGreenBits
,
238 accumBlueBits
, accumAlphaBits
,
248 * Makes some sanity checks and fills in the fields of the
249 * GLvisual object with the given parameters. If the caller needs
250 * to set additional fields, he should just probably init the whole GLvisual
252 * \return GL_TRUE on success, or GL_FALSE on failure.
254 * \sa _mesa_create_visual() above for the parameter description.
257 _mesa_initialize_visual( GLvisual
*vis
,
260 GLboolean stereoFlag
,
269 GLint accumGreenBits
,
271 GLint accumAlphaBits
,
276 if (depthBits
< 0 || depthBits
> 32) {
279 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
282 assert(accumRedBits
>= 0);
283 assert(accumGreenBits
>= 0);
284 assert(accumBlueBits
>= 0);
285 assert(accumAlphaBits
>= 0);
287 vis
->rgbMode
= rgbFlag
;
288 vis
->doubleBufferMode
= dbFlag
;
289 vis
->stereoMode
= stereoFlag
;
291 vis
->redBits
= redBits
;
292 vis
->greenBits
= greenBits
;
293 vis
->blueBits
= blueBits
;
294 vis
->alphaBits
= alphaBits
;
295 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
297 vis
->indexBits
= indexBits
;
298 vis
->depthBits
= depthBits
;
299 vis
->stencilBits
= stencilBits
;
301 vis
->accumRedBits
= accumRedBits
;
302 vis
->accumGreenBits
= accumGreenBits
;
303 vis
->accumBlueBits
= accumBlueBits
;
304 vis
->accumAlphaBits
= accumAlphaBits
;
306 vis
->haveAccumBuffer
= accumRedBits
> 0;
307 vis
->haveDepthBuffer
= depthBits
> 0;
308 vis
->haveStencilBuffer
= stencilBits
> 0;
310 vis
->numAuxBuffers
= 0;
313 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
314 vis
->samples
= numSamples
;
321 * Destroy a visual and free its memory.
325 * Frees the visual structure.
328 _mesa_destroy_visual( GLvisual
*vis
)
336 /**********************************************************************/
337 /** \name Context allocation, initialization, destroying
339 * The purpose of the most initialization functions here is to provide the
340 * default state values according to the OpenGL specification.
342 /**********************************************************************/
347 * This is lame. gdb only seems to recognize enum types that are
348 * actually used somewhere. We want to be able to print/use enum
349 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
350 * the gl_texture_index type anywhere. Thus, this lame function.
353 dummy_enum_func(void)
356 gl_colortable_index ci
;
376 * One-time initialization mutex lock.
378 * \sa Used by one_time_init().
380 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
383 * Calls all the various one-time-init functions in Mesa.
385 * While holding a global mutex lock, calls several initialization functions,
386 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
392 one_time_init( GLcontext
*ctx
)
394 static GLboolean alreadyCalled
= GL_FALSE
;
396 _glthread_LOCK_MUTEX(OneTimeLock
);
397 if (!alreadyCalled
) {
400 /* do some implementation tests */
401 assert( sizeof(GLbyte
) == 1 );
402 assert( sizeof(GLubyte
) == 1 );
403 assert( sizeof(GLshort
) == 2 );
404 assert( sizeof(GLushort
) == 2 );
405 assert( sizeof(GLint
) == 4 );
406 assert( sizeof(GLuint
) == 4 );
408 _mesa_get_cpu_features();
410 _mesa_init_remap_table();
412 _mesa_init_sqrt_table();
414 for (i
= 0; i
< 256; i
++) {
415 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
418 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
419 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
420 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
423 alreadyCalled
= GL_TRUE
;
425 _glthread_UNLOCK_MUTEX(OneTimeLock
);
432 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
435 _mesa_init_current(GLcontext
*ctx
)
439 /* Init all to (0,0,0,1) */
440 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
441 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
444 /* redo special cases: */
445 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
446 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
447 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
448 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
449 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
450 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
455 * Init vertex/fragment program limits.
456 * Important: drivers should override these with actual limits.
459 init_program_limits(GLenum type
, struct gl_program_constants
*prog
)
461 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
462 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
463 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
464 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
465 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
466 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
467 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
468 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
470 if (type
== GL_VERTEX_PROGRAM_ARB
) {
471 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
472 prog
->MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
473 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
476 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
477 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
478 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
481 /* Set the native limits to zero. This implies that there is no native
482 * support for shaders. Let the drivers fill in the actual values.
484 prog
->MaxNativeInstructions
= 0;
485 prog
->MaxNativeAluInstructions
= 0;
486 prog
->MaxNativeTexInstructions
= 0;
487 prog
->MaxNativeTexIndirections
= 0;
488 prog
->MaxNativeAttribs
= 0;
489 prog
->MaxNativeTemps
= 0;
490 prog
->MaxNativeAddressRegs
= 0;
491 prog
->MaxNativeParameters
= 0;
496 * Initialize fields of gl_constants (aka ctx->Const.*).
497 * Use defaults from config.h. The device drivers will often override
498 * some of these values (such as number of texture units).
501 _mesa_init_constants(GLcontext
*ctx
)
505 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
506 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
508 /* Max texture size should be <= max viewport size (render to texture) */
509 assert((1 << (MAX_TEXTURE_LEVELS
- 1)) <= MAX_WIDTH
);
511 /* Constants, may be overriden (usually only reduced) by device drivers */
512 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
513 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
514 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
515 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
516 ctx
->Const
.MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
517 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
518 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
519 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
520 ctx
->Const
.MaxTextureImageUnits
);
521 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
522 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
523 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
524 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
525 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
526 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
527 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
528 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
529 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
530 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
531 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
532 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
533 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
534 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
535 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
536 ctx
->Const
.MaxConvolutionWidth
= MAX_CONVOLUTION_WIDTH
;
537 ctx
->Const
.MaxConvolutionHeight
= MAX_CONVOLUTION_HEIGHT
;
538 ctx
->Const
.MaxClipPlanes
= MAX_CLIP_PLANES
;
539 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
540 ctx
->Const
.MaxShininess
= 128.0;
541 ctx
->Const
.MaxSpotExponent
= 128.0;
542 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
543 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
544 #if FEATURE_ARB_vertex_program
545 init_program_limits(GL_VERTEX_PROGRAM_ARB
, &ctx
->Const
.VertexProgram
);
547 #if FEATURE_ARB_fragment_program
548 init_program_limits(GL_FRAGMENT_PROGRAM_ARB
, &ctx
->Const
.FragmentProgram
);
550 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
551 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
553 /* CheckArrayBounds is overriden by drivers/x11 for X server */
554 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
556 /* GL_ARB_draw_buffers */
557 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
559 #if FEATURE_EXT_framebuffer_object
560 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
561 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
564 #if FEATURE_ARB_vertex_shader
565 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
566 ctx
->Const
.MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
567 ctx
->Const
.MaxVarying
= MAX_VARYING
;
570 /* GL_ARB_framebuffer_object */
571 ctx
->Const
.MaxSamples
= 0;
574 ctx
->Const
.MaxServerWaitTimeout
= (GLuint64
) ~0;
576 /* GL_ATI_envmap_bumpmap */
577 ctx
->Const
.SupportedBumpUnits
= SUPPORTED_ATI_BUMP_UNITS
;
579 /* GL_EXT_provoking_vertex */
580 ctx
->Const
.QuadsFollowProvokingVertexConvention
= GL_TRUE
;
583 ASSERT(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
584 ctx
->Const
.MaxTextureCoordUnits
));
585 ASSERT(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
586 ASSERT(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
588 ASSERT(MAX_NV_FRAGMENT_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
589 ASSERT(MAX_NV_VERTEX_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
590 ASSERT(MAX_NV_VERTEX_PROGRAM_INPUTS
<= VERT_ATTRIB_MAX
);
591 ASSERT(MAX_NV_VERTEX_PROGRAM_OUTPUTS
<= VERT_RESULT_MAX
);
593 /* check that we don't exceed the size of various bitfields */
594 ASSERT(VERT_RESULT_MAX
<=
595 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
596 ASSERT(FRAG_ATTRIB_MAX
<=
597 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
602 * Do some sanity checks on the limits/constants for the given context.
603 * Only called the first time a context is bound.
606 check_context_limits(GLcontext
*ctx
)
608 /* Many context limits/constants are limited by the size of
611 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
612 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
613 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
614 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
616 /* number of coord units cannot be greater than number of image units */
617 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.MaxTextureImageUnits
);
619 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
620 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
621 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
622 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
624 /* make sure largest texture image is <= MAX_WIDTH in size */
625 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= MAX_WIDTH
);
626 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= MAX_WIDTH
);
627 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= MAX_WIDTH
);
629 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
630 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
632 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
634 /* XXX probably add more tests */
639 * Initialize the attribute groups in a GL context.
641 * \param ctx GL context.
643 * Initializes all the attributes, calling the respective <tt>init*</tt>
644 * functions for the more complex data structures.
647 init_attrib_groups(GLcontext
*ctx
)
652 _mesa_init_constants( ctx
);
655 _mesa_init_extensions( ctx
);
657 /* Attribute Groups */
658 _mesa_init_accum( ctx
);
659 _mesa_init_attrib( ctx
);
660 _mesa_init_buffer_objects( ctx
);
661 _mesa_init_color( ctx
);
662 _mesa_init_colortables( ctx
);
663 _mesa_init_current( ctx
);
664 _mesa_init_depth( ctx
);
665 _mesa_init_debug( ctx
);
666 _mesa_init_display_list( ctx
);
667 _mesa_init_eval( ctx
);
668 _mesa_init_fbobjects( ctx
);
669 _mesa_init_feedback( ctx
);
670 _mesa_init_fog( ctx
);
671 _mesa_init_histogram( ctx
);
672 _mesa_init_hint( ctx
);
673 _mesa_init_line( ctx
);
674 _mesa_init_lighting( ctx
);
675 _mesa_init_matrix( ctx
);
676 _mesa_init_multisample( ctx
);
677 _mesa_init_pixel( ctx
);
678 _mesa_init_pixelstore( ctx
);
679 _mesa_init_point( ctx
);
680 _mesa_init_polygon( ctx
);
681 _mesa_init_program( ctx
);
682 _mesa_init_queryobj( ctx
);
684 _mesa_init_sync( ctx
);
686 _mesa_init_rastpos( ctx
);
687 _mesa_init_scissor( ctx
);
688 _mesa_init_shader_state( ctx
);
689 _mesa_init_stencil( ctx
);
690 _mesa_init_transform( ctx
);
691 _mesa_init_varray( ctx
);
692 _mesa_init_viewport( ctx
);
694 if (!_mesa_init_texture( ctx
))
697 _mesa_init_texture_s3tc( ctx
);
700 ctx
->NewState
= _NEW_ALL
;
701 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
702 ctx
->varying_vp_inputs
= ~0;
709 * Update default objects in a GL context with respect to shared state.
711 * \param ctx GL context.
713 * Removes references to old default objects, (texture objects, program
714 * objects, etc.) and changes to reference those from the current shared
718 update_default_objects(GLcontext
*ctx
)
722 _mesa_update_default_objects_program(ctx
);
723 _mesa_update_default_objects_texture(ctx
);
724 _mesa_update_default_objects_buffer_objects(ctx
);
731 * This is the default function we plug into all dispatch table slots
732 * This helps prevents a segfault when someone calls a GL function without
733 * first checking if the extension's supported.
738 _mesa_warning(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
744 * Allocate and initialize a new dispatch table.
746 static struct _glapi_table
*
747 alloc_dispatch_table(void)
749 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
750 * In practice, this'll be the same for stand-alone Mesa. But for DRI
751 * Mesa we do this to accomodate different versions of libGL and various
754 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
755 sizeof(struct _glapi_table
) / sizeof(_glapi_proc
));
756 struct _glapi_table
*table
=
757 (struct _glapi_table
*) _mesa_malloc(numEntries
* sizeof(_glapi_proc
));
759 _glapi_proc
*entry
= (_glapi_proc
*) table
;
761 for (i
= 0; i
< numEntries
; i
++) {
762 entry
[i
] = (_glapi_proc
) generic_nop
;
770 * Initialize a GLcontext struct (rendering context).
772 * This includes allocating all the other structs and arrays which hang off of
773 * the context by pointers.
774 * Note that the driver needs to pass in its dd_function_table here since
775 * we need to at least call driverFunctions->NewTextureObject to create the
776 * default texture objects.
778 * Called by _mesa_create_context().
780 * Performs the imports and exports callback tables initialization, and
781 * miscellaneous one-time initializations. If no shared context is supplied one
782 * is allocated, and increase its reference count. Setups the GL API dispatch
783 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
784 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
787 * \param ctx the context to initialize
788 * \param visual describes the visual attributes for this context
789 * \param share_list points to context to share textures, display lists,
791 * \param driverFunctions table of device driver functions for this context
793 * \param driverContext pointer to driver-specific context data
796 _mesa_initialize_context(GLcontext
*ctx
,
797 const GLvisual
*visual
,
798 GLcontext
*share_list
,
799 const struct dd_function_table
*driverFunctions
,
802 struct gl_shared_state
*shared
;
804 /*ASSERT(driverContext);*/
805 assert(driverFunctions
->NewTextureObject
);
806 assert(driverFunctions
->FreeTexImageData
);
808 /* misc one-time initializations */
811 ctx
->Visual
= *visual
;
812 ctx
->DrawBuffer
= NULL
;
813 ctx
->ReadBuffer
= NULL
;
814 ctx
->WinSysDrawBuffer
= NULL
;
815 ctx
->WinSysReadBuffer
= NULL
;
817 /* Plug in driver functions and context pointer here.
818 * This is important because when we call alloc_shared_state() below
819 * we'll call ctx->Driver.NewTextureObject() to create the default
822 ctx
->Driver
= *driverFunctions
;
823 ctx
->DriverCtx
= driverContext
;
826 /* share state with another context */
827 shared
= share_list
->Shared
;
830 /* allocate new, unshared state */
831 shared
= _mesa_alloc_shared_state(ctx
);
836 _glthread_LOCK_MUTEX(shared
->Mutex
);
837 ctx
->Shared
= shared
;
839 _glthread_UNLOCK_MUTEX(shared
->Mutex
);
841 if (!init_attrib_groups( ctx
)) {
842 _mesa_free_shared_state(ctx
, ctx
->Shared
);
846 /* setup the API dispatch tables */
847 ctx
->Exec
= alloc_dispatch_table();
848 ctx
->Save
= alloc_dispatch_table();
849 if (!ctx
->Exec
|| !ctx
->Save
) {
850 _mesa_free_shared_state(ctx
, ctx
->Shared
);
852 _mesa_free(ctx
->Exec
);
856 _mesa_init_exec_table(ctx
->Exec
);
858 ctx
->CurrentDispatch
= ctx
->Exec
;
861 _mesa_init_save_table(ctx
->Save
);
862 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
865 /* Neutral tnl module stuff */
866 _mesa_init_exec_vtxfmt( ctx
);
867 ctx
->TnlModule
.Current
= NULL
;
868 ctx
->TnlModule
.SwapCount
= 0;
870 ctx
->FragmentProgram
._MaintainTexEnvProgram
871 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
873 ctx
->VertexProgram
._MaintainTnlProgram
874 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
875 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
876 /* this is required... */
877 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
880 #ifdef FEATURE_extra_context_init
881 _mesa_initialize_context_extra(ctx
);
884 ctx
->FirstTimeCurrent
= GL_TRUE
;
891 * Allocate and initialize a GLcontext structure.
892 * Note that the driver needs to pass in its dd_function_table here since
893 * we need to at least call driverFunctions->NewTextureObject to initialize
894 * the rendering context.
896 * \param visual a GLvisual pointer (we copy the struct contents)
897 * \param share_list another context to share display lists with or NULL
898 * \param driverFunctions points to the dd_function_table into which the
899 * driver has plugged in all its special functions.
900 * \param driverContext points to the device driver's private context state
902 * \return pointer to a new __GLcontextRec or NULL if error.
905 _mesa_create_context(const GLvisual
*visual
,
906 GLcontext
*share_list
,
907 const struct dd_function_table
*driverFunctions
,
913 /*ASSERT(driverContext);*/
915 ctx
= (GLcontext
*) _mesa_calloc(sizeof(GLcontext
));
919 if (_mesa_initialize_context(ctx
, visual
, share_list
,
920 driverFunctions
, driverContext
)) {
931 * Free the data associated with the given context.
933 * But doesn't free the GLcontext struct itself.
935 * \sa _mesa_initialize_context() and init_attrib_groups().
938 _mesa_free_context_data( GLcontext
*ctx
)
942 if (!_mesa_get_current_context()){
943 /* No current context, but we may need one in order to delete
944 * texture objs, etc. So temporarily bind the context now.
946 _mesa_make_current(ctx
, NULL
, NULL
);
949 /* unreference WinSysDraw/Read buffers */
950 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
951 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
952 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
953 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
955 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
956 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
957 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
959 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
960 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
961 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
963 _mesa_free_attrib_data(ctx
);
964 _mesa_free_lighting_data( ctx
);
965 _mesa_free_eval_data( ctx
);
966 _mesa_free_texture_data( ctx
);
967 _mesa_free_matrix_data( ctx
);
968 _mesa_free_viewport_data( ctx
);
969 _mesa_free_colortables_data( ctx
);
970 _mesa_free_program_data(ctx
);
971 _mesa_free_shader_state(ctx
);
972 _mesa_free_queryobj_data(ctx
);
974 _mesa_free_sync_data(ctx
);
976 _mesa_free_varray_data(ctx
);
978 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
980 #if FEATURE_ARB_pixel_buffer_object
981 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
982 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
985 #if FEATURE_ARB_vertex_buffer_object
986 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
987 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ElementArrayBufferObj
, NULL
);
990 /* free dispatch tables */
991 _mesa_free(ctx
->Exec
);
992 _mesa_free(ctx
->Save
);
994 /* Shared context state (display lists, textures, etc) */
995 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
996 RefCount
= --ctx
->Shared
->RefCount
;
997 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
998 assert(RefCount
>= 0);
1000 /* free shared state */
1001 _mesa_free_shared_state( ctx
, ctx
->Shared
);
1004 /* needs to be after freeing shared state */
1005 _mesa_free_display_list_data(ctx
);
1007 if (ctx
->Extensions
.String
)
1008 _mesa_free((void *) ctx
->Extensions
.String
);
1010 if (ctx
->VersionString
)
1011 _mesa_free(ctx
->VersionString
);
1013 /* unbind the context if it's currently bound */
1014 if (ctx
== _mesa_get_current_context()) {
1015 _mesa_make_current(NULL
, NULL
, NULL
);
1021 * Destroy a GLcontext structure.
1023 * \param ctx GL context.
1025 * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
1028 _mesa_destroy_context( GLcontext
*ctx
)
1031 _mesa_free_context_data(ctx
);
1032 _mesa_free( (void *) ctx
);
1039 * Copy attribute groups from one context to another.
1041 * \param src source context
1042 * \param dst destination context
1043 * \param mask bitwise OR of GL_*_BIT flags
1045 * According to the bits specified in \p mask, copies the corresponding
1046 * attributes from \p src into \p dst. For many of the attributes a simple \c
1047 * memcpy is not enough due to the existence of internal pointers in their data
1051 _mesa_copy_context( const GLcontext
*src
, GLcontext
*dst
, GLuint mask
)
1053 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1055 dst
->Accum
= src
->Accum
;
1057 if (mask
& GL_COLOR_BUFFER_BIT
) {
1059 dst
->Color
= src
->Color
;
1061 if (mask
& GL_CURRENT_BIT
) {
1063 dst
->Current
= src
->Current
;
1065 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1067 dst
->Depth
= src
->Depth
;
1069 if (mask
& GL_ENABLE_BIT
) {
1072 if (mask
& GL_EVAL_BIT
) {
1074 dst
->Eval
= src
->Eval
;
1076 if (mask
& GL_FOG_BIT
) {
1078 dst
->Fog
= src
->Fog
;
1080 if (mask
& GL_HINT_BIT
) {
1082 dst
->Hint
= src
->Hint
;
1084 if (mask
& GL_LIGHTING_BIT
) {
1086 /* begin with memcpy */
1087 dst
->Light
= src
->Light
;
1088 /* fixup linked lists to prevent pointer insanity */
1089 make_empty_list( &(dst
->Light
.EnabledList
) );
1090 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1091 if (dst
->Light
.Light
[i
].Enabled
) {
1092 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1096 if (mask
& GL_LINE_BIT
) {
1098 dst
->Line
= src
->Line
;
1100 if (mask
& GL_LIST_BIT
) {
1102 dst
->List
= src
->List
;
1104 if (mask
& GL_PIXEL_MODE_BIT
) {
1106 dst
->Pixel
= src
->Pixel
;
1108 if (mask
& GL_POINT_BIT
) {
1110 dst
->Point
= src
->Point
;
1112 if (mask
& GL_POLYGON_BIT
) {
1114 dst
->Polygon
= src
->Polygon
;
1116 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1117 /* Use loop instead of MEMCPY due to problem with Portland Group's
1118 * C compiler. Reported by John Stone.
1121 for (i
= 0; i
< 32; i
++) {
1122 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1125 if (mask
& GL_SCISSOR_BIT
) {
1127 dst
->Scissor
= src
->Scissor
;
1129 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1131 dst
->Stencil
= src
->Stencil
;
1133 if (mask
& GL_TEXTURE_BIT
) {
1134 /* Cannot memcpy because of pointers */
1135 _mesa_copy_texture_state(src
, dst
);
1137 if (mask
& GL_TRANSFORM_BIT
) {
1139 dst
->Transform
= src
->Transform
;
1141 if (mask
& GL_VIEWPORT_BIT
) {
1142 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1143 dst
->Viewport
.X
= src
->Viewport
.X
;
1144 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1145 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1146 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1147 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1148 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1149 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1152 /* XXX FIXME: Call callbacks?
1154 dst
->NewState
= _NEW_ALL
;
1160 * Check if the given context can render into the given framebuffer
1161 * by checking visual attributes.
1163 * Most of these tests could go away because Mesa is now pretty flexible
1164 * in terms of mixing rendering contexts with framebuffers. As long
1165 * as RGB vs. CI mode agree, we're probably good.
1167 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1170 check_compatible(const GLcontext
*ctx
, const GLframebuffer
*buffer
)
1172 const GLvisual
*ctxvis
= &ctx
->Visual
;
1173 const GLvisual
*bufvis
= &buffer
->Visual
;
1175 if (ctxvis
== bufvis
)
1178 if (ctxvis
->rgbMode
!= bufvis
->rgbMode
)
1181 /* disabling this fixes the fgl_glxgears pbuffer demo */
1182 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1185 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1187 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1189 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1191 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1193 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1195 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1197 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1200 /* disabled (see bug 11161) */
1201 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1204 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1212 * Do one-time initialization for the given framebuffer. Specifically,
1213 * ask the driver for the window's current size and update the framebuffer
1215 * Really, the device driver should totally take care of this.
1218 initialize_framebuffer_size(GLcontext
*ctx
, GLframebuffer
*fb
)
1220 GLuint width
, height
;
1221 if (ctx
->Driver
.GetBufferSize
) {
1222 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1223 if (ctx
->Driver
.ResizeBuffers
)
1224 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1225 fb
->Initialized
= GL_TRUE
;
1231 * Check if the viewport/scissor size has not yet been initialized.
1232 * Initialize the size if the given width and height are non-zero.
1235 _mesa_check_init_viewport(GLcontext
*ctx
, GLuint width
, GLuint height
)
1237 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1238 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1239 * potential infinite recursion.
1241 ctx
->ViewportInitialized
= GL_TRUE
;
1242 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
1243 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
1249 * Bind the given context to the given drawBuffer and readBuffer and
1250 * make it the current context for the calling thread.
1251 * We'll render into the drawBuffer and read pixels from the
1252 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1254 * We check that the context's and framebuffer's visuals are compatible
1255 * and return immediately if they're not.
1257 * \param newCtx the new GL context. If NULL then there will be no current GL
1259 * \param drawBuffer the drawing framebuffer
1260 * \param readBuffer the reading framebuffer
1263 _mesa_make_current( GLcontext
*newCtx
, GLframebuffer
*drawBuffer
,
1264 GLframebuffer
*readBuffer
)
1266 if (MESA_VERBOSE
& VERBOSE_API
)
1267 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1269 /* Check that the context's and framebuffer's visuals are compatible.
1271 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1272 if (!check_compatible(newCtx
, drawBuffer
)) {
1273 _mesa_warning(newCtx
,
1274 "MakeCurrent: incompatible visuals for context and drawbuffer");
1278 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1279 if (!check_compatible(newCtx
, readBuffer
)) {
1280 _mesa_warning(newCtx
,
1281 "MakeCurrent: incompatible visuals for context and readbuffer");
1286 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1287 _glapi_set_context((void *) newCtx
);
1288 ASSERT(_mesa_get_current_context() == newCtx
);
1291 _glapi_set_dispatch(NULL
); /* none current */
1294 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1296 if (drawBuffer
&& readBuffer
) {
1297 /* TODO: check if newCtx and buffer's visual match??? */
1299 ASSERT(drawBuffer
->Name
== 0);
1300 ASSERT(readBuffer
->Name
== 0);
1301 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1302 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1305 * Only set the context's Draw/ReadBuffer fields if they're NULL
1306 * or not bound to a user-created FBO.
1308 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1309 /* KW: merge conflict here, revisit.
1311 /* fix up the fb fields - these will end up wrong otherwise
1312 * if the DRIdrawable changes, and everything relies on them.
1313 * This is a bit messy (same as needed in _mesa_BindFramebufferEXT)
1316 GLenum buffers
[MAX_DRAW_BUFFERS
];
1318 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1320 for(i
= 0; i
< newCtx
->Const
.MaxDrawBuffers
; i
++) {
1321 buffers
[i
] = newCtx
->Color
.DrawBuffer
[i
];
1324 _mesa_drawbuffers(newCtx
, newCtx
->Const
.MaxDrawBuffers
, buffers
, NULL
);
1326 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1327 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1330 /* XXX only set this flag if we're really changing the draw/read
1331 * framebuffer bindings.
1333 newCtx
->NewState
|= _NEW_BUFFERS
;
1336 /* We want to get rid of these lines: */
1339 if (!drawBuffer
->Initialized
) {
1340 initialize_framebuffer_size(newCtx
, drawBuffer
);
1342 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1343 initialize_framebuffer_size(newCtx
, readBuffer
);
1346 _mesa_resizebuffers(newCtx
);
1350 /* We want the drawBuffer and readBuffer to be initialized by
1352 * This generally means the Width and Height match the actual
1353 * window size and the renderbuffers (both hardware and software
1354 * based) are allocated to match. The later can generally be
1355 * done with a call to _mesa_resize_framebuffer().
1357 * It's theoretically possible for a buffer to have zero width
1358 * or height, but for now, assert check that the driver did what's
1361 ASSERT(drawBuffer
->Width
> 0);
1362 ASSERT(drawBuffer
->Height
> 0);
1366 _mesa_check_init_viewport(newCtx
,
1367 drawBuffer
->Width
, drawBuffer
->Height
);
1371 if (newCtx
->FirstTimeCurrent
) {
1372 _mesa_compute_version(newCtx
);
1374 check_context_limits(newCtx
);
1376 /* We can use this to help debug user's problems. Tell them to set
1377 * the MESA_INFO env variable before running their app. Then the
1378 * first time each context is made current we'll print some useful
1381 if (_mesa_getenv("MESA_INFO")) {
1385 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1394 * Make context 'ctx' share the display lists, textures and programs
1395 * that are associated with 'ctxToShare'.
1396 * Any display lists, textures or programs associated with 'ctx' will
1397 * be deleted if nobody else is sharing them.
1400 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
)
1402 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1403 struct gl_shared_state
*oldSharedState
= ctx
->Shared
;
1406 ctx
->Shared
= ctxToShare
->Shared
;
1408 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1409 ctx
->Shared
->RefCount
++;
1410 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1412 update_default_objects(ctx
);
1414 _glthread_LOCK_MUTEX(oldSharedState
->Mutex
);
1415 RefCount
= --oldSharedState
->RefCount
;
1416 _glthread_UNLOCK_MUTEX(oldSharedState
->Mutex
);
1418 if (RefCount
== 0) {
1419 _mesa_free_shared_state(ctx
, oldSharedState
);
1432 * \return pointer to the current GL context for this thread.
1434 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1435 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1439 _mesa_get_current_context( void )
1441 return (GLcontext
*) _glapi_get_context();
1446 * Get context's current API dispatch table.
1448 * It'll either be the immediate-mode execute dispatcher or the display list
1449 * compile dispatcher.
1451 * \param ctx GL context.
1453 * \return pointer to dispatch_table.
1455 * Simply returns __GLcontextRec::CurrentDispatch.
1457 struct _glapi_table
*
1458 _mesa_get_dispatch(GLcontext
*ctx
)
1460 return ctx
->CurrentDispatch
;
1466 /**********************************************************************/
1467 /** \name Miscellaneous functions */
1468 /**********************************************************************/
1474 * \param ctx GL context.
1475 * \param error error code.
1477 * Records the given error code and call the driver's dd_function_table::Error
1478 * function if defined.
1481 * This is called via _mesa_error().
1484 _mesa_record_error(GLcontext
*ctx
, GLenum error
)
1489 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1490 ctx
->ErrorValue
= error
;
1493 /* Call device driver's error handler, if any. This is used on the Mac. */
1494 if (ctx
->Driver
.Error
) {
1495 ctx
->Driver
.Error(ctx
);
1501 * Flush commands and wait for completion.
1504 _mesa_finish(GLcontext
*ctx
)
1506 FLUSH_CURRENT( ctx
, 0 );
1507 if (ctx
->Driver
.Finish
) {
1508 ctx
->Driver
.Finish(ctx
);
1517 _mesa_flush(GLcontext
*ctx
)
1519 FLUSH_CURRENT( ctx
, 0 );
1520 if (ctx
->Driver
.Flush
) {
1521 ctx
->Driver
.Flush(ctx
);
1528 * Execute glFinish().
1530 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1531 * dd_function_table::Finish driver callback, if not NULL.
1536 GET_CURRENT_CONTEXT(ctx
);
1537 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1543 * Execute glFlush().
1545 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1546 * dd_function_table::Flush driver callback, if not NULL.
1551 GET_CURRENT_CONTEXT(ctx
);
1552 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1558 * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over
1559 * MUL/MAD, or vice versa, call this function to register that.
1560 * Otherwise we default to MUL/MAD.
1563 _mesa_set_mvp_with_dp4( GLcontext
*ctx
,
1566 ctx
->mvp_with_dp4
= flag
;
1572 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1573 * is called to see if it's valid to render. This involves checking that
1574 * the current shader is valid and the framebuffer is complete.
1575 * If an error is detected it'll be recorded here.
1576 * \return GL_TRUE if OK to render, GL_FALSE if not
1579 _mesa_valid_to_render(GLcontext
*ctx
, const char *where
)
1581 if (ctx
->Shader
.CurrentProgram
) {
1583 if (!ctx
->Shader
.CurrentProgram
->LinkStatus
) {
1584 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1585 "%s(shader not linked), where");
1588 #if 0 /* not normally enabled */
1591 if (!_mesa_validate_shader_program(ctx
, ctx
->Shader
.CurrentProgram
,
1593 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1594 ctx
->Shader
.CurrentProgram
->Name
, errMsg
);
1600 if (ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1601 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1602 "%s(vertex program not valid)", where
);
1605 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1606 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1607 "%s(fragment program not valid)", where
);
1612 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
1613 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
1614 "%s(incomplete framebuffer)", where
);
1619 if (ctx
->Shader
.Flags
& GLSL_LOG
) {
1620 struct gl_shader_program
*shProg
= ctx
->Shader
.CurrentProgram
;
1622 if (!shProg
->_Used
) {
1623 /* This is the first time this shader is being used.
1624 * Append shader's constants/uniforms to log file.
1627 for (i
= 0; i
< shProg
->NumShaders
; i
++) {
1628 struct gl_shader
*sh
= shProg
->Shaders
[i
];
1629 if (sh
->Type
== GL_VERTEX_SHADER
) {
1630 _mesa_append_uniforms_to_file(sh
,
1631 &shProg
->VertexProgram
->Base
);
1633 else if (sh
->Type
== GL_FRAGMENT_SHADER
) {
1634 _mesa_append_uniforms_to_file(sh
,
1635 &shProg
->FragmentProgram
->Base
);
1638 shProg
->_Used
= GL_TRUE
;