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"
95 #include "extensions.h"
99 #include "framebuffer.h"
106 #include "multisample.h"
108 #include "pixelstore.h"
111 #include "queryobj.h"
117 #include "shaderobj.h"
118 #include "simple_list.h"
121 #include "texcompress_s3tc.h"
122 #include "texstate.h"
123 #include "transformfeedback.h"
127 #include "viewport.h"
129 #include "program/program.h"
130 #include "program/prog_print.h"
132 #include "math/m_matrix.h"
136 #include "sparc/sparc.h"
139 #include "glsl_parser_extras.h"
144 int MESA_VERBOSE
= 0;
147 #ifndef MESA_DEBUG_FLAGS
148 int MESA_DEBUG_FLAGS
= 0;
152 /* ubyte -> float conversion */
153 GLfloat _mesa_ubyte_to_float_color_tab
[256];
158 * Swap buffers notification callback.
160 * \param ctx GL context.
162 * Called by window system just before swapping buffers.
163 * We have to finish any pending rendering.
166 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
168 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
169 _mesa_debug(ctx
, "SwapBuffers\n");
170 FLUSH_CURRENT( ctx
, 0 );
171 if (ctx
->Driver
.Flush
) {
172 ctx
->Driver
.Flush(ctx
);
177 /**********************************************************************/
178 /** \name GL Visual allocation/destruction */
179 /**********************************************************************/
183 * Allocates a struct gl_config structure and initializes it via
184 * _mesa_initialize_visual().
186 * \param dbFlag double buffering
187 * \param stereoFlag stereo buffer
188 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
189 * is acceptable but the actual depth type will be GLushort or GLuint as
191 * \param stencilBits requested minimum bits per stencil buffer value
192 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
193 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
194 * \param redBits number of bits per color component in frame buffer for RGB(A)
195 * mode. We always use 8 in core Mesa though.
196 * \param greenBits same as above.
197 * \param blueBits same as above.
198 * \param alphaBits same as above.
199 * \param numSamples not really used.
201 * \return pointer to new struct gl_config or NULL if requested parameters can't be
204 * \note Need to add params for level and numAuxBuffers (at least)
207 _mesa_create_visual( GLboolean dbFlag
,
208 GLboolean stereoFlag
,
216 GLint accumGreenBits
,
218 GLint accumAlphaBits
,
221 struct gl_config
*vis
= (struct gl_config
*) calloc(1, sizeof(struct gl_config
));
223 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
224 redBits
, greenBits
, blueBits
, alphaBits
,
225 depthBits
, stencilBits
,
226 accumRedBits
, accumGreenBits
,
227 accumBlueBits
, accumAlphaBits
,
237 * Makes some sanity checks and fills in the fields of the
238 * struct gl_config object with the given parameters. If the caller needs
239 * to set additional fields, he should just probably init the whole struct gl_config
241 * \return GL_TRUE on success, or GL_FALSE on failure.
243 * \sa _mesa_create_visual() above for the parameter description.
246 _mesa_initialize_visual( struct gl_config
*vis
,
248 GLboolean stereoFlag
,
256 GLint accumGreenBits
,
258 GLint accumAlphaBits
,
263 if (depthBits
< 0 || depthBits
> 32) {
266 if (stencilBits
< 0 || stencilBits
> STENCIL_BITS
) {
269 assert(accumRedBits
>= 0);
270 assert(accumGreenBits
>= 0);
271 assert(accumBlueBits
>= 0);
272 assert(accumAlphaBits
>= 0);
274 vis
->rgbMode
= GL_TRUE
;
275 vis
->doubleBufferMode
= dbFlag
;
276 vis
->stereoMode
= stereoFlag
;
278 vis
->redBits
= redBits
;
279 vis
->greenBits
= greenBits
;
280 vis
->blueBits
= blueBits
;
281 vis
->alphaBits
= alphaBits
;
282 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
285 vis
->depthBits
= depthBits
;
286 vis
->stencilBits
= stencilBits
;
288 vis
->accumRedBits
= accumRedBits
;
289 vis
->accumGreenBits
= accumGreenBits
;
290 vis
->accumBlueBits
= accumBlueBits
;
291 vis
->accumAlphaBits
= accumAlphaBits
;
293 vis
->haveAccumBuffer
= accumRedBits
> 0;
294 vis
->haveDepthBuffer
= depthBits
> 0;
295 vis
->haveStencilBuffer
= stencilBits
> 0;
297 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( struct gl_config
*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 /**********************************************************************/
333 * This is lame. gdb only seems to recognize enum types that are
334 * actually used somewhere. We want to be able to print/use enum
335 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
336 * the gl_texture_index type anywhere. Thus, this lame function.
339 dummy_enum_func(void)
341 gl_buffer_index bi
= BUFFER_FRONT_LEFT
;
342 gl_face_index fi
= FACE_POS_X
;
343 gl_frag_attrib fa
= FRAG_ATTRIB_WPOS
;
344 gl_frag_result fr
= FRAG_RESULT_DEPTH
;
345 gl_texture_index ti
= TEXTURE_2D_ARRAY_INDEX
;
346 gl_vert_attrib va
= VERT_ATTRIB_POS
;
347 gl_vert_result vr
= VERT_RESULT_HPOS
;
348 gl_geom_attrib ga
= GEOM_ATTRIB_POSITION
;
349 gl_geom_result gr
= GEOM_RESULT_POS
;
364 * One-time initialization mutex lock.
366 * \sa Used by one_time_init().
368 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
371 * Calls all the various one-time-init functions in Mesa.
373 * While holding a global mutex lock, calls several initialization functions,
374 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
380 one_time_init( struct gl_context
*ctx
)
382 static GLboolean alreadyCalled
= GL_FALSE
;
384 _glthread_LOCK_MUTEX(OneTimeLock
);
385 if (!alreadyCalled
) {
388 /* do some implementation tests */
389 assert( sizeof(GLbyte
) == 1 );
390 assert( sizeof(GLubyte
) == 1 );
391 assert( sizeof(GLshort
) == 2 );
392 assert( sizeof(GLushort
) == 2 );
393 assert( sizeof(GLint
) == 4 );
394 assert( sizeof(GLuint
) == 4 );
396 _mesa_get_cpu_features();
401 _mesa_init_remap_table();
406 _mesa_init_remap_table_es1();
411 _mesa_init_remap_table_es2();
418 _mesa_init_sqrt_table();
419 _mesa_init_get_hash(ctx
);
421 for (i
= 0; i
< 256; i
++) {
422 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
425 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
426 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
427 MESA_VERSION_STRING
, __DATE__
, __TIME__
);
430 alreadyCalled
= GL_TRUE
;
432 _glthread_UNLOCK_MUTEX(OneTimeLock
);
434 /* Hopefully atexit() is widely available. If not, we may need some
437 atexit(_mesa_destroy_shader_compiler
);
444 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
447 _mesa_init_current(struct gl_context
*ctx
)
451 /* Init all to (0,0,0,1) */
452 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
453 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
456 /* redo special cases: */
457 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
458 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
459 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
460 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
461 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
462 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
467 * Init vertex/fragment/geometry program limits.
468 * Important: drivers should override these with actual limits.
471 init_program_limits(GLenum type
, struct gl_program_constants
*prog
)
473 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
474 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
475 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
476 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
477 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
478 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
479 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
480 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
483 case GL_VERTEX_PROGRAM_ARB
:
484 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
485 prog
->MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
486 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
488 case GL_FRAGMENT_PROGRAM_ARB
:
489 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
490 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
491 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
493 case MESA_GEOMETRY_PROGRAM
:
494 prog
->MaxParameters
= MAX_NV_VERTEX_PROGRAM_PARAMS
;
495 prog
->MaxAttribs
= MAX_NV_VERTEX_PROGRAM_INPUTS
;
496 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
498 prog
->MaxGeometryTextureImageUnits
= MAX_GEOMETRY_TEXTURE_IMAGE_UNITS
;
499 prog
->MaxGeometryVaryingComponents
= MAX_GEOMETRY_VARYING_COMPONENTS
;
500 prog
->MaxVertexVaryingComponents
= MAX_VERTEX_VARYING_COMPONENTS
;
501 prog
->MaxGeometryUniformComponents
= MAX_GEOMETRY_UNIFORM_COMPONENTS
;
502 prog
->MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
503 prog
->MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
506 assert(0 && "Bad program type in init_program_limits()");
509 /* Set the native limits to zero. This implies that there is no native
510 * support for shaders. Let the drivers fill in the actual values.
512 prog
->MaxNativeInstructions
= 0;
513 prog
->MaxNativeAluInstructions
= 0;
514 prog
->MaxNativeTexInstructions
= 0;
515 prog
->MaxNativeTexIndirections
= 0;
516 prog
->MaxNativeAttribs
= 0;
517 prog
->MaxNativeTemps
= 0;
518 prog
->MaxNativeAddressRegs
= 0;
519 prog
->MaxNativeParameters
= 0;
524 * Initialize fields of gl_constants (aka ctx->Const.*).
525 * Use defaults from config.h. The device drivers will often override
526 * some of these values (such as number of texture units).
529 _mesa_init_constants(struct gl_context
*ctx
)
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
.MaxClipPlanes
= MAX_CLIP_PLANES
;
559 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
560 ctx
->Const
.MaxShininess
= 128.0;
561 ctx
->Const
.MaxSpotExponent
= 128.0;
562 ctx
->Const
.MaxViewportWidth
= MAX_WIDTH
;
563 ctx
->Const
.MaxViewportHeight
= MAX_HEIGHT
;
564 #if FEATURE_ARB_vertex_program
565 init_program_limits(GL_VERTEX_PROGRAM_ARB
, &ctx
->Const
.VertexProgram
);
567 #if FEATURE_ARB_fragment_program
568 init_program_limits(GL_FRAGMENT_PROGRAM_ARB
, &ctx
->Const
.FragmentProgram
);
570 #if FEATURE_ARB_geometry_shader4
571 init_program_limits(MESA_GEOMETRY_PROGRAM
, &ctx
->Const
.GeometryProgram
);
573 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
574 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
576 /* CheckArrayBounds is overriden by drivers/x11 for X server */
577 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
579 /* GL_ARB_draw_buffers */
580 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
582 #if FEATURE_EXT_framebuffer_object
583 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
584 ctx
->Const
.MaxRenderbufferSize
= MAX_WIDTH
;
587 #if FEATURE_ARB_vertex_shader
588 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
589 ctx
->Const
.MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
590 ctx
->Const
.MaxVarying
= MAX_VARYING
;
593 /* Shading language version */
594 if (ctx
->API
== API_OPENGL
) {
595 #if FEATURE_ARB_shading_language_120
596 ctx
->Const
.GLSLVersion
= 120;
598 ctx
->Const
.GLSLVersion
= 110;
601 else if (ctx
->API
== API_OPENGLES2
) {
602 ctx
->Const
.GLSLVersion
= 100;
604 else if (ctx
->API
== API_OPENGLES
) {
605 ctx
->Const
.GLSLVersion
= 0; /* GLSL not supported */
608 /* GL_ARB_framebuffer_object */
609 ctx
->Const
.MaxSamples
= 0;
612 ctx
->Const
.MaxServerWaitTimeout
= (GLuint64
) ~0;
614 /* GL_ATI_envmap_bumpmap */
615 ctx
->Const
.SupportedBumpUnits
= SUPPORTED_ATI_BUMP_UNITS
;
617 /* GL_EXT_provoking_vertex */
618 ctx
->Const
.QuadsFollowProvokingVertexConvention
= GL_TRUE
;
620 /* GL_EXT_transform_feedback */
621 ctx
->Const
.MaxTransformFeedbackSeparateAttribs
= MAX_FEEDBACK_ATTRIBS
;
622 ctx
->Const
.MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
623 ctx
->Const
.MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
625 /* GL 3.2: hard-coded for now: */
626 ctx
->Const
.ProfileMask
= GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
631 * Do some sanity checks on the limits/constants for the given context.
632 * Only called the first time a context is bound.
635 check_context_limits(struct gl_context
*ctx
)
637 /* check that we don't exceed the size of various bitfields */
638 assert(VERT_RESULT_MAX
<=
639 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
640 assert(FRAG_ATTRIB_MAX
<=
641 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
643 assert(MAX_COMBINED_TEXTURE_IMAGE_UNITS
<= 8 * sizeof(GLbitfield
));
645 /* shader-related checks */
646 assert(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
647 assert(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
649 assert(MAX_NV_FRAGMENT_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
650 assert(MAX_NV_VERTEX_PROGRAM_TEMPS
<= MAX_PROGRAM_TEMPS
);
651 assert(MAX_NV_VERTEX_PROGRAM_INPUTS
<= VERT_ATTRIB_MAX
);
652 assert(MAX_NV_VERTEX_PROGRAM_OUTPUTS
<= VERT_RESULT_MAX
);
654 /* Texture unit checks */
655 assert(ctx
->Const
.MaxTextureImageUnits
> 0);
656 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
657 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
658 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
659 assert(ctx
->Const
.MaxTextureUnits
> 0);
660 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
661 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
662 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
663 ctx
->Const
.MaxTextureCoordUnits
));
664 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
665 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
666 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
667 /* number of coord units cannot be greater than number of image units */
668 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.MaxTextureImageUnits
);
671 /* Texture size checks */
672 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
673 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
674 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
675 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
677 /* make sure largest texture image is <= MAX_WIDTH in size */
678 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= MAX_WIDTH
);
679 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= MAX_WIDTH
);
680 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= MAX_WIDTH
);
682 /* Texture level checks */
683 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
684 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
686 /* Max texture size should be <= max viewport size (render to texture) */
687 assert((1 << (MAX_TEXTURE_LEVELS
- 1)) <= MAX_WIDTH
);
689 assert(ctx
->Const
.MaxViewportWidth
<= MAX_WIDTH
);
690 assert(ctx
->Const
.MaxViewportHeight
<= MAX_WIDTH
);
692 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
694 /* if this fails, add more enum values to gl_buffer_index */
695 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
697 /* XXX probably add more tests */
702 * Initialize the attribute groups in a GL context.
704 * \param ctx GL context.
706 * Initializes all the attributes, calling the respective <tt>init*</tt>
707 * functions for the more complex data structures.
710 init_attrib_groups(struct gl_context
*ctx
)
715 _mesa_init_constants( ctx
);
718 _mesa_init_extensions( ctx
);
720 /* Attribute Groups */
721 _mesa_init_accum( ctx
);
722 _mesa_init_attrib( ctx
);
723 _mesa_init_buffer_objects( ctx
);
724 _mesa_init_color( ctx
);
725 _mesa_init_current( ctx
);
726 _mesa_init_depth( ctx
);
727 _mesa_init_debug( ctx
);
728 _mesa_init_display_list( ctx
);
729 _mesa_init_eval( ctx
);
730 _mesa_init_fbobjects( ctx
);
731 _mesa_init_feedback( ctx
);
732 _mesa_init_fog( ctx
);
733 _mesa_init_hint( ctx
);
734 _mesa_init_line( ctx
);
735 _mesa_init_lighting( ctx
);
736 _mesa_init_matrix( ctx
);
737 _mesa_init_multisample( ctx
);
738 _mesa_init_pixel( ctx
);
739 _mesa_init_pixelstore( ctx
);
740 _mesa_init_point( ctx
);
741 _mesa_init_polygon( ctx
);
742 _mesa_init_program( ctx
);
743 _mesa_init_queryobj( ctx
);
744 _mesa_init_sync( ctx
);
745 _mesa_init_rastpos( ctx
);
746 _mesa_init_scissor( ctx
);
747 _mesa_init_shader_state( ctx
);
748 _mesa_init_stencil( ctx
);
749 _mesa_init_transform( ctx
);
750 _mesa_init_transform_feedback( ctx
);
751 _mesa_init_varray( ctx
);
752 _mesa_init_viewport( ctx
);
754 if (!_mesa_init_texture( ctx
))
757 _mesa_init_texture_s3tc( ctx
);
760 ctx
->NewState
= _NEW_ALL
;
761 ctx
->ErrorValue
= (GLenum
) GL_NO_ERROR
;
762 ctx
->varying_vp_inputs
= ~0;
769 * Update default objects in a GL context with respect to shared state.
771 * \param ctx GL context.
773 * Removes references to old default objects, (texture objects, program
774 * objects, etc.) and changes to reference those from the current shared
778 update_default_objects(struct gl_context
*ctx
)
782 _mesa_update_default_objects_program(ctx
);
783 _mesa_update_default_objects_texture(ctx
);
784 _mesa_update_default_objects_buffer_objects(ctx
);
791 * This is the default function we plug into all dispatch table slots
792 * This helps prevents a segfault when someone calls a GL function without
793 * first checking if the extension's supported.
798 _mesa_warning(NULL
, "User called no-op dispatch function (an unsupported extension function?)");
804 * Allocate and initialize a new dispatch table.
806 struct _glapi_table
*
807 _mesa_alloc_dispatch_table(int size
)
809 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
810 * In practice, this'll be the same for stand-alone Mesa. But for DRI
811 * Mesa we do this to accomodate different versions of libGL and various
814 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(),
815 size
/ sizeof(_glapi_proc
));
816 struct _glapi_table
*table
=
817 (struct _glapi_table
*) malloc(numEntries
* sizeof(_glapi_proc
));
819 _glapi_proc
*entry
= (_glapi_proc
*) table
;
821 for (i
= 0; i
< numEntries
; i
++) {
822 entry
[i
] = (_glapi_proc
) generic_nop
;
830 * Initialize a struct gl_context struct (rendering context).
832 * This includes allocating all the other structs and arrays which hang off of
833 * the context by pointers.
834 * Note that the driver needs to pass in its dd_function_table here since
835 * we need to at least call driverFunctions->NewTextureObject to create the
836 * default texture objects.
838 * Called by _mesa_create_context().
840 * Performs the imports and exports callback tables initialization, and
841 * miscellaneous one-time initializations. If no shared context is supplied one
842 * is allocated, and increase its reference count. Setups the GL API dispatch
843 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
844 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
847 * \param ctx the context to initialize
848 * \param api the GL API type to create the context for
849 * \param visual describes the visual attributes for this context
850 * \param share_list points to context to share textures, display lists,
852 * \param driverFunctions table of device driver functions for this context
854 * \param driverContext pointer to driver-specific context data
857 _mesa_initialize_context_for_api(struct gl_context
*ctx
,
859 const struct gl_config
*visual
,
860 struct gl_context
*share_list
,
861 const struct dd_function_table
*driverFunctions
,
864 struct gl_shared_state
*shared
;
867 /*ASSERT(driverContext);*/
868 assert(driverFunctions
->NewTextureObject
);
869 assert(driverFunctions
->FreeTexImageData
);
872 ctx
->Visual
= *visual
;
873 ctx
->DrawBuffer
= NULL
;
874 ctx
->ReadBuffer
= NULL
;
875 ctx
->WinSysDrawBuffer
= NULL
;
876 ctx
->WinSysReadBuffer
= NULL
;
878 /* misc one-time initializations */
881 /* Plug in driver functions and context pointer here.
882 * This is important because when we call alloc_shared_state() below
883 * we'll call ctx->Driver.NewTextureObject() to create the default
886 ctx
->Driver
= *driverFunctions
;
887 ctx
->DriverCtx
= driverContext
;
890 /* share state with another context */
891 shared
= share_list
->Shared
;
894 /* allocate new, unshared state */
895 shared
= _mesa_alloc_shared_state(ctx
);
900 _glthread_LOCK_MUTEX(shared
->Mutex
);
901 ctx
->Shared
= shared
;
903 _glthread_UNLOCK_MUTEX(shared
->Mutex
);
905 if (!init_attrib_groups( ctx
)) {
906 _mesa_release_shared_state(ctx
, ctx
->Shared
);
911 /* setup the API dispatch tables */
915 ctx
->Exec
= _mesa_create_exec_table();
920 ctx
->Exec
= _mesa_create_exec_table_es1();
925 ctx
->Exec
= _mesa_create_exec_table_es2();
929 _mesa_problem(ctx
, "unknown or unsupported API");
934 _mesa_release_shared_state(ctx
, ctx
->Shared
);
938 ctx
->CurrentDispatch
= ctx
->Exec
;
940 ctx
->FragmentProgram
._MaintainTexEnvProgram
941 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
943 ctx
->VertexProgram
._MaintainTnlProgram
944 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
945 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
946 /* this is required... */
947 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
953 ctx
->Save
= _mesa_create_save_table();
955 _mesa_release_shared_state(ctx
, ctx
->Shared
);
960 _mesa_install_save_vtxfmt( ctx
, &ctx
->ListState
.ListVtxfmt
);
965 * GL_OES_texture_cube_map says
966 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
968 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
969 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
970 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
971 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
972 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
973 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
974 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
975 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
979 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
980 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
981 ctx
->Point
.PointSprite
= GL_TRUE
; /* always on for ES 2.x */
985 ctx
->FirstTimeCurrent
= GL_TRUE
;
991 _mesa_initialize_context(struct gl_context
*ctx
,
992 const struct gl_config
*visual
,
993 struct gl_context
*share_list
,
994 const struct dd_function_table
*driverFunctions
,
997 return _mesa_initialize_context_for_api(ctx
,
1006 * Allocate and initialize a struct gl_context structure.
1007 * Note that the driver needs to pass in its dd_function_table here since
1008 * we need to at least call driverFunctions->NewTextureObject to initialize
1009 * the rendering context.
1011 * \param api the GL API type to create the context for
1012 * \param visual a struct gl_config pointer (we copy the struct contents)
1013 * \param share_list another context to share display lists with or NULL
1014 * \param driverFunctions points to the dd_function_table into which the
1015 * driver has plugged in all its special functions.
1016 * \param driverContext points to the device driver's private context state
1018 * \return pointer to a new __struct gl_contextRec or NULL if error.
1021 _mesa_create_context_for_api(gl_api api
,
1022 const struct gl_config
*visual
,
1023 struct gl_context
*share_list
,
1024 const struct dd_function_table
*driverFunctions
,
1025 void *driverContext
)
1027 struct gl_context
*ctx
;
1030 /*ASSERT(driverContext);*/
1032 ctx
= (struct gl_context
*) calloc(1, sizeof(struct gl_context
));
1036 if (_mesa_initialize_context_for_api(ctx
, api
, visual
, share_list
,
1037 driverFunctions
, driverContext
)) {
1047 _mesa_create_context(const struct gl_config
*visual
,
1048 struct gl_context
*share_list
,
1049 const struct dd_function_table
*driverFunctions
,
1050 void *driverContext
)
1052 return _mesa_create_context_for_api(API_OPENGL
, visual
,
1059 * Free the data associated with the given context.
1061 * But doesn't free the struct gl_context struct itself.
1063 * \sa _mesa_initialize_context() and init_attrib_groups().
1066 _mesa_free_context_data( struct gl_context
*ctx
)
1068 if (!_mesa_get_current_context()){
1069 /* No current context, but we may need one in order to delete
1070 * texture objs, etc. So temporarily bind the context now.
1072 _mesa_make_current(ctx
, NULL
, NULL
);
1075 /* unreference WinSysDraw/Read buffers */
1076 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1077 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1078 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1079 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1081 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1082 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1083 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1085 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1086 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1087 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1089 _mesa_free_attrib_data(ctx
);
1090 _mesa_free_buffer_objects(ctx
);
1091 _mesa_free_lighting_data( ctx
);
1092 _mesa_free_eval_data( ctx
);
1093 _mesa_free_texture_data( ctx
);
1094 _mesa_free_matrix_data( ctx
);
1095 _mesa_free_viewport_data( ctx
);
1096 _mesa_free_program_data(ctx
);
1097 _mesa_free_shader_state(ctx
);
1098 _mesa_free_queryobj_data(ctx
);
1099 _mesa_free_sync_data(ctx
);
1100 _mesa_free_varray_data(ctx
);
1101 _mesa_free_transform_feedback(ctx
);
1103 _mesa_delete_array_object(ctx
, ctx
->Array
.DefaultArrayObj
);
1105 #if FEATURE_ARB_pixel_buffer_object
1106 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1107 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1108 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1111 #if FEATURE_ARB_vertex_buffer_object
1112 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1113 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ElementArrayBufferObj
, NULL
);
1116 /* free dispatch tables */
1120 /* Shared context state (display lists, textures, etc) */
1121 _mesa_release_shared_state( ctx
, ctx
->Shared
);
1123 /* needs to be after freeing shared state */
1124 _mesa_free_display_list_data(ctx
);
1126 if (ctx
->Extensions
.String
)
1127 free((void *) ctx
->Extensions
.String
);
1129 if (ctx
->VersionString
)
1130 free(ctx
->VersionString
);
1132 /* unbind the context if it's currently bound */
1133 if (ctx
== _mesa_get_current_context()) {
1134 _mesa_make_current(NULL
, NULL
, NULL
);
1140 * Destroy a struct gl_context structure.
1142 * \param ctx GL context.
1144 * Calls _mesa_free_context_data() and frees the struct gl_context structure itself.
1147 _mesa_destroy_context( struct gl_context
*ctx
)
1150 _mesa_free_context_data(ctx
);
1151 free( (void *) ctx
);
1158 * Copy attribute groups from one context to another.
1160 * \param src source context
1161 * \param dst destination context
1162 * \param mask bitwise OR of GL_*_BIT flags
1164 * According to the bits specified in \p mask, copies the corresponding
1165 * attributes from \p src into \p dst. For many of the attributes a simple \c
1166 * memcpy is not enough due to the existence of internal pointers in their data
1170 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
, GLuint mask
)
1172 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1174 dst
->Accum
= src
->Accum
;
1176 if (mask
& GL_COLOR_BUFFER_BIT
) {
1178 dst
->Color
= src
->Color
;
1180 if (mask
& GL_CURRENT_BIT
) {
1182 dst
->Current
= src
->Current
;
1184 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1186 dst
->Depth
= src
->Depth
;
1188 if (mask
& GL_ENABLE_BIT
) {
1191 if (mask
& GL_EVAL_BIT
) {
1193 dst
->Eval
= src
->Eval
;
1195 if (mask
& GL_FOG_BIT
) {
1197 dst
->Fog
= src
->Fog
;
1199 if (mask
& GL_HINT_BIT
) {
1201 dst
->Hint
= src
->Hint
;
1203 if (mask
& GL_LIGHTING_BIT
) {
1205 /* begin with memcpy */
1206 dst
->Light
= src
->Light
;
1207 /* fixup linked lists to prevent pointer insanity */
1208 make_empty_list( &(dst
->Light
.EnabledList
) );
1209 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1210 if (dst
->Light
.Light
[i
].Enabled
) {
1211 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1215 if (mask
& GL_LINE_BIT
) {
1217 dst
->Line
= src
->Line
;
1219 if (mask
& GL_LIST_BIT
) {
1221 dst
->List
= src
->List
;
1223 if (mask
& GL_PIXEL_MODE_BIT
) {
1225 dst
->Pixel
= src
->Pixel
;
1227 if (mask
& GL_POINT_BIT
) {
1229 dst
->Point
= src
->Point
;
1231 if (mask
& GL_POLYGON_BIT
) {
1233 dst
->Polygon
= src
->Polygon
;
1235 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1236 /* Use loop instead of memcpy due to problem with Portland Group's
1237 * C compiler. Reported by John Stone.
1240 for (i
= 0; i
< 32; i
++) {
1241 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1244 if (mask
& GL_SCISSOR_BIT
) {
1246 dst
->Scissor
= src
->Scissor
;
1248 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1250 dst
->Stencil
= src
->Stencil
;
1252 if (mask
& GL_TEXTURE_BIT
) {
1253 /* Cannot memcpy because of pointers */
1254 _mesa_copy_texture_state(src
, dst
);
1256 if (mask
& GL_TRANSFORM_BIT
) {
1258 dst
->Transform
= src
->Transform
;
1260 if (mask
& GL_VIEWPORT_BIT
) {
1261 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1262 dst
->Viewport
.X
= src
->Viewport
.X
;
1263 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1264 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1265 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1266 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1267 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1268 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1271 /* XXX FIXME: Call callbacks?
1273 dst
->NewState
= _NEW_ALL
;
1279 * Check if the given context can render into the given framebuffer
1280 * by checking visual attributes.
1282 * Most of these tests could go away because Mesa is now pretty flexible
1283 * in terms of mixing rendering contexts with framebuffers. As long
1284 * as RGB vs. CI mode agree, we're probably good.
1286 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1289 check_compatible(const struct gl_context
*ctx
, const struct gl_framebuffer
*buffer
)
1291 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1292 const struct gl_config
*bufvis
= &buffer
->Visual
;
1294 if (ctxvis
== bufvis
)
1297 if (buffer
== _mesa_get_incomplete_framebuffer())
1301 /* disabling this fixes the fgl_glxgears pbuffer demo */
1302 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1305 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1307 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1309 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1311 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1313 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1315 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1317 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1320 /* disabled (see bug 11161) */
1321 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1324 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1332 * Do one-time initialization for the given framebuffer. Specifically,
1333 * ask the driver for the window's current size and update the framebuffer
1335 * Really, the device driver should totally take care of this.
1338 initialize_framebuffer_size(struct gl_context
*ctx
, struct gl_framebuffer
*fb
)
1340 GLuint width
, height
;
1341 if (ctx
->Driver
.GetBufferSize
) {
1342 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1343 if (ctx
->Driver
.ResizeBuffers
)
1344 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1345 fb
->Initialized
= GL_TRUE
;
1351 * Check if the viewport/scissor size has not yet been initialized.
1352 * Initialize the size if the given width and height are non-zero.
1355 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1357 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1358 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1359 * potential infinite recursion.
1361 ctx
->ViewportInitialized
= GL_TRUE
;
1362 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
1363 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
1369 * Bind the given context to the given drawBuffer and readBuffer and
1370 * make it the current context for the calling thread.
1371 * We'll render into the drawBuffer and read pixels from the
1372 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1374 * We check that the context's and framebuffer's visuals are compatible
1375 * and return immediately if they're not.
1377 * \param newCtx the new GL context. If NULL then there will be no current GL
1379 * \param drawBuffer the drawing framebuffer
1380 * \param readBuffer the reading framebuffer
1383 _mesa_make_current( struct gl_context
*newCtx
, struct gl_framebuffer
*drawBuffer
,
1384 struct gl_framebuffer
*readBuffer
)
1386 if (MESA_VERBOSE
& VERBOSE_API
)
1387 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1389 /* Check that the context's and framebuffer's visuals are compatible.
1391 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1392 if (!check_compatible(newCtx
, drawBuffer
)) {
1393 _mesa_warning(newCtx
,
1394 "MakeCurrent: incompatible visuals for context and drawbuffer");
1398 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1399 if (!check_compatible(newCtx
, readBuffer
)) {
1400 _mesa_warning(newCtx
,
1401 "MakeCurrent: incompatible visuals for context and readbuffer");
1406 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1407 _glapi_set_context((void *) newCtx
);
1408 ASSERT(_mesa_get_current_context() == newCtx
);
1411 _glapi_set_dispatch(NULL
); /* none current */
1414 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1416 if (drawBuffer
&& readBuffer
) {
1417 /* TODO: check if newCtx and buffer's visual match??? */
1419 ASSERT(drawBuffer
->Name
== 0);
1420 ASSERT(readBuffer
->Name
== 0);
1421 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1422 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1425 * Only set the context's Draw/ReadBuffer fields if they're NULL
1426 * or not bound to a user-created FBO.
1428 if (!newCtx
->DrawBuffer
|| newCtx
->DrawBuffer
->Name
== 0) {
1429 /* KW: merge conflict here, revisit.
1431 /* fix up the fb fields - these will end up wrong otherwise
1432 * if the DRIdrawable changes, and everything relies on them.
1433 * This is a bit messy (same as needed in _mesa_BindFramebufferEXT)
1436 GLenum buffers
[MAX_DRAW_BUFFERS
];
1438 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1440 for(i
= 0; i
< newCtx
->Const
.MaxDrawBuffers
; i
++) {
1441 buffers
[i
] = newCtx
->Color
.DrawBuffer
[i
];
1444 _mesa_drawbuffers(newCtx
, newCtx
->Const
.MaxDrawBuffers
, buffers
, NULL
);
1446 if (!newCtx
->ReadBuffer
|| newCtx
->ReadBuffer
->Name
== 0) {
1447 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1450 /* XXX only set this flag if we're really changing the draw/read
1451 * framebuffer bindings.
1453 newCtx
->NewState
|= _NEW_BUFFERS
;
1456 /* We want to get rid of these lines: */
1459 if (!drawBuffer
->Initialized
) {
1460 initialize_framebuffer_size(newCtx
, drawBuffer
);
1462 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1463 initialize_framebuffer_size(newCtx
, readBuffer
);
1466 _mesa_resizebuffers(newCtx
);
1470 /* We want the drawBuffer and readBuffer to be initialized by
1472 * This generally means the Width and Height match the actual
1473 * window size and the renderbuffers (both hardware and software
1474 * based) are allocated to match. The later can generally be
1475 * done with a call to _mesa_resize_framebuffer().
1477 * It's theoretically possible for a buffer to have zero width
1478 * or height, but for now, assert check that the driver did what's
1481 ASSERT(drawBuffer
->Width
> 0);
1482 ASSERT(drawBuffer
->Height
> 0);
1486 _mesa_check_init_viewport(newCtx
,
1487 drawBuffer
->Width
, drawBuffer
->Height
);
1491 if (newCtx
->FirstTimeCurrent
) {
1492 _mesa_compute_version(newCtx
);
1494 newCtx
->Extensions
.String
= _mesa_make_extension_string(newCtx
);
1496 check_context_limits(newCtx
);
1498 /* We can use this to help debug user's problems. Tell them to set
1499 * the MESA_INFO env variable before running their app. Then the
1500 * first time each context is made current we'll print some useful
1503 if (_mesa_getenv("MESA_INFO")) {
1507 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1516 * Make context 'ctx' share the display lists, textures and programs
1517 * that are associated with 'ctxToShare'.
1518 * Any display lists, textures or programs associated with 'ctx' will
1519 * be deleted if nobody else is sharing them.
1522 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1524 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1525 struct gl_shared_state
*oldSharedState
= ctx
->Shared
;
1527 ctx
->Shared
= ctxToShare
->Shared
;
1529 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1530 ctx
->Shared
->RefCount
++;
1531 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1533 update_default_objects(ctx
);
1535 _mesa_release_shared_state(ctx
, oldSharedState
);
1547 * \return pointer to the current GL context for this thread.
1549 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1550 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1554 _mesa_get_current_context( void )
1556 return (struct gl_context
*) _glapi_get_context();
1561 * Get context's current API dispatch table.
1563 * It'll either be the immediate-mode execute dispatcher or the display list
1564 * compile dispatcher.
1566 * \param ctx GL context.
1568 * \return pointer to dispatch_table.
1570 * Simply returns __struct gl_contextRec::CurrentDispatch.
1572 struct _glapi_table
*
1573 _mesa_get_dispatch(struct gl_context
*ctx
)
1575 return ctx
->CurrentDispatch
;
1581 /**********************************************************************/
1582 /** \name Miscellaneous functions */
1583 /**********************************************************************/
1589 * \param ctx GL context.
1590 * \param error error code.
1592 * Records the given error code and call the driver's dd_function_table::Error
1593 * function if defined.
1596 * This is called via _mesa_error().
1599 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1604 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1605 ctx
->ErrorValue
= error
;
1608 /* Call device driver's error handler, if any. This is used on the Mac. */
1609 if (ctx
->Driver
.Error
) {
1610 ctx
->Driver
.Error(ctx
);
1616 * Flush commands and wait for completion.
1619 _mesa_finish(struct gl_context
*ctx
)
1621 FLUSH_CURRENT( ctx
, 0 );
1622 if (ctx
->Driver
.Finish
) {
1623 ctx
->Driver
.Finish(ctx
);
1632 _mesa_flush(struct gl_context
*ctx
)
1634 FLUSH_CURRENT( ctx
, 0 );
1635 if (ctx
->Driver
.Flush
) {
1636 ctx
->Driver
.Flush(ctx
);
1643 * Execute glFinish().
1645 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1646 * dd_function_table::Finish driver callback, if not NULL.
1651 GET_CURRENT_CONTEXT(ctx
);
1652 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1658 * Execute glFlush().
1660 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1661 * dd_function_table::Flush driver callback, if not NULL.
1666 GET_CURRENT_CONTEXT(ctx
);
1667 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1673 * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over
1674 * MUL/MAD, or vice versa, call this function to register that.
1675 * Otherwise we default to MUL/MAD.
1678 _mesa_set_mvp_with_dp4( struct gl_context
*ctx
,
1681 ctx
->mvp_with_dp4
= flag
;
1687 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1688 * is called to see if it's valid to render. This involves checking that
1689 * the current shader is valid and the framebuffer is complete.
1690 * If an error is detected it'll be recorded here.
1691 * \return GL_TRUE if OK to render, GL_FALSE if not
1694 _mesa_valid_to_render(struct gl_context
*ctx
, const char *where
)
1696 bool vert_from_glsl_shader
= false;
1697 bool geom_from_glsl_shader
= false;
1698 bool frag_from_glsl_shader
= false;
1700 /* This depends on having up to date derived state (shaders) */
1702 _mesa_update_state(ctx
);
1704 if (ctx
->Shader
.CurrentProgram
) {
1705 struct gl_shader_program
*const prog
= ctx
->Shader
.CurrentProgram
;
1708 if (!prog
->LinkStatus
) {
1709 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1710 "%s(shader not linked)", where
);
1713 #if 0 /* not normally enabled */
1716 if (!_mesa_validate_shader_program(ctx
, prog
, errMsg
)) {
1717 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1718 prog
->Name
, errMsg
);
1723 /* Figure out which shader stages are provided by the GLSL program. For
1724 * any stages that are not provided, the corresponding assembly shader
1725 * target will be validated below.
1727 vert_from_glsl_shader
=
1728 prog
->_LinkedShaders
[MESA_SHADER_VERTEX
] != NULL
;
1729 geom_from_glsl_shader
=
1730 prog
->_LinkedShaders
[MESA_SHADER_GEOMETRY
] != NULL
;
1731 frag_from_glsl_shader
=
1732 prog
->_LinkedShaders
[MESA_SHADER_FRAGMENT
] != NULL
;
1736 /* Any shader stages that are not supplied by the GLSL shader and have
1737 * assembly shaders enabled must now be validated.
1739 if (!vert_from_glsl_shader
1740 && ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1741 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1742 "%s(vertex program not valid)", where
);
1746 /* FINISHME: If GL_NV_geometry_program4 is ever supported, the current
1747 * FINISHME: geometry program should validated here.
1749 (void) geom_from_glsl_shader
;
1751 if (!frag_from_glsl_shader
1752 && ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1753 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1754 "%s(fragment program not valid)", where
);
1758 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
1759 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
1760 "%s(incomplete framebuffer)", where
);
1765 if (ctx
->Shader
.Flags
& GLSL_LOG
) {
1766 struct gl_shader_program
*shProg
= ctx
->Shader
.CurrentProgram
;
1768 if (!shProg
->_Used
) {
1769 /* This is the first time this shader is being used.
1770 * Append shader's constants/uniforms to log file.
1773 for (i
= 0; i
< shProg
->NumShaders
; i
++) {
1774 struct gl_shader
*sh
= shProg
->Shaders
[i
];
1775 if (sh
->Type
== GL_VERTEX_SHADER
) {
1776 _mesa_append_uniforms_to_file(sh
,
1777 &shProg
->VertexProgram
->Base
);
1779 else if (sh
->Type
== GL_FRAGMENT_SHADER
) {
1780 _mesa_append_uniforms_to_file(sh
,
1781 &shProg
->FragmentProgram
->Base
);
1784 shProg
->_Used
= GL_TRUE
;