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"
84 #include "api_loopback.h"
89 #include "bufferobj.h"
96 #include "extensions.h"
101 #include "framebuffer.h"
108 #include "multisample.h"
110 #include "pixelstore.h"
113 #include "queryobj.h"
119 #include "shaderobj.h"
120 #include "simple_list.h"
123 #include "texcompress_s3tc.h"
124 #include "texstate.h"
125 #include "transformfeedback.h"
129 #include "viewport.h"
131 #include "program/program.h"
132 #include "program/prog_print.h"
133 #include "math/m_matrix.h"
134 #include "main/dispatch.h" /* for _gloffset_COUNT */
137 #include "sparc/sparc.h"
140 #include "glsl_parser_extras.h"
145 int MESA_VERBOSE
= 0;
148 #ifndef MESA_DEBUG_FLAGS
149 int MESA_DEBUG_FLAGS
= 0;
153 /* ubyte -> float conversion */
154 GLfloat _mesa_ubyte_to_float_color_tab
[256];
159 * Swap buffers notification callback.
161 * \param ctx GL context.
163 * Called by window system just before swapping buffers.
164 * We have to finish any pending rendering.
167 _mesa_notifySwapBuffers(struct gl_context
*ctx
)
169 if (MESA_VERBOSE
& VERBOSE_SWAPBUFFERS
)
170 _mesa_debug(ctx
, "SwapBuffers\n");
171 FLUSH_CURRENT( ctx
, 0 );
172 if (ctx
->Driver
.Flush
) {
173 ctx
->Driver
.Flush(ctx
);
178 /**********************************************************************/
179 /** \name GL Visual allocation/destruction */
180 /**********************************************************************/
184 * Allocates a struct gl_config structure and initializes it via
185 * _mesa_initialize_visual().
187 * \param dbFlag double buffering
188 * \param stereoFlag stereo buffer
189 * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
190 * is acceptable but the actual depth type will be GLushort or GLuint as
192 * \param stencilBits requested minimum bits per stencil buffer value
193 * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number
194 * of bits per color component in accum buffer.
195 * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
196 * \param redBits number of bits per color component in frame buffer for RGB(A)
197 * mode. We always use 8 in core Mesa though.
198 * \param greenBits same as above.
199 * \param blueBits same as above.
200 * \param alphaBits same as above.
201 * \param numSamples not really used.
203 * \return pointer to new struct gl_config or NULL if requested parameters
206 * \note Need to add params for level and numAuxBuffers (at least)
209 _mesa_create_visual( GLboolean dbFlag
,
210 GLboolean stereoFlag
,
218 GLint accumGreenBits
,
220 GLint accumAlphaBits
,
223 struct gl_config
*vis
= CALLOC_STRUCT(gl_config
);
225 if (!_mesa_initialize_visual(vis
, dbFlag
, stereoFlag
,
226 redBits
, greenBits
, blueBits
, alphaBits
,
227 depthBits
, stencilBits
,
228 accumRedBits
, accumGreenBits
,
229 accumBlueBits
, accumAlphaBits
,
240 * Makes some sanity checks and fills in the fields of the struct
241 * gl_config object with the given parameters. If the caller needs to
242 * set additional fields, he should just probably init the whole
243 * gl_config object himself.
245 * \return GL_TRUE on success, or GL_FALSE on failure.
247 * \sa _mesa_create_visual() above for the parameter description.
250 _mesa_initialize_visual( struct gl_config
*vis
,
252 GLboolean stereoFlag
,
260 GLint accumGreenBits
,
262 GLint accumAlphaBits
,
267 if (depthBits
< 0 || depthBits
> 32) {
270 if (stencilBits
< 0 || stencilBits
> 8) {
273 assert(accumRedBits
>= 0);
274 assert(accumGreenBits
>= 0);
275 assert(accumBlueBits
>= 0);
276 assert(accumAlphaBits
>= 0);
278 vis
->rgbMode
= GL_TRUE
;
279 vis
->doubleBufferMode
= dbFlag
;
280 vis
->stereoMode
= stereoFlag
;
282 vis
->redBits
= redBits
;
283 vis
->greenBits
= greenBits
;
284 vis
->blueBits
= blueBits
;
285 vis
->alphaBits
= alphaBits
;
286 vis
->rgbBits
= redBits
+ greenBits
+ blueBits
;
289 vis
->depthBits
= depthBits
;
290 vis
->stencilBits
= stencilBits
;
292 vis
->accumRedBits
= accumRedBits
;
293 vis
->accumGreenBits
= accumGreenBits
;
294 vis
->accumBlueBits
= accumBlueBits
;
295 vis
->accumAlphaBits
= accumAlphaBits
;
297 vis
->haveAccumBuffer
= accumRedBits
> 0;
298 vis
->haveDepthBuffer
= depthBits
> 0;
299 vis
->haveStencilBuffer
= stencilBits
> 0;
301 vis
->numAuxBuffers
= 0;
303 vis
->sampleBuffers
= numSamples
> 0 ? 1 : 0;
304 vis
->samples
= numSamples
;
311 * Destroy a visual and free its memory.
315 * Frees the visual structure.
318 _mesa_destroy_visual( struct gl_config
*vis
)
326 /**********************************************************************/
327 /** \name Context allocation, initialization, destroying
329 * The purpose of the most initialization functions here is to provide the
330 * default state values according to the OpenGL specification.
332 /**********************************************************************/
337 * This is lame. gdb only seems to recognize enum types that are
338 * actually used somewhere. We want to be able to print/use enum
339 * values such as TEXTURE_2D_INDEX in gdb. But we don't actually use
340 * the gl_texture_index type anywhere. Thus, this lame function.
343 dummy_enum_func(void)
345 gl_buffer_index bi
= BUFFER_FRONT_LEFT
;
346 gl_face_index fi
= FACE_POS_X
;
347 gl_frag_attrib fa
= FRAG_ATTRIB_WPOS
;
348 gl_frag_result fr
= FRAG_RESULT_DEPTH
;
349 gl_texture_index ti
= TEXTURE_2D_ARRAY_INDEX
;
350 gl_vert_attrib va
= VERT_ATTRIB_POS
;
351 gl_varying_slot vs
= VARYING_SLOT_POS
;
352 gl_geom_result gr
= GEOM_RESULT_POS
;
366 * One-time initialization mutex lock.
368 * \sa Used by one_time_init().
370 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock
);
375 * Calls all the various one-time-init functions in Mesa.
377 * While holding a global mutex lock, calls several initialization functions,
378 * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
384 one_time_init( struct gl_context
*ctx
)
386 static GLbitfield api_init_mask
= 0x0;
388 _glthread_LOCK_MUTEX(OneTimeLock
);
390 /* truly one-time init */
391 if (!api_init_mask
) {
394 /* do some implementation tests */
395 assert( sizeof(GLbyte
) == 1 );
396 assert( sizeof(GLubyte
) == 1 );
397 assert( sizeof(GLshort
) == 2 );
398 assert( sizeof(GLushort
) == 2 );
399 assert( sizeof(GLint
) == 4 );
400 assert( sizeof(GLuint
) == 4 );
402 _mesa_get_cpu_features();
404 for (i
= 0; i
< 256; i
++) {
405 _mesa_ubyte_to_float_color_tab
[i
] = (float) i
/ 255.0F
;
408 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
409 if (MESA_VERBOSE
!= 0) {
410 _mesa_debug(ctx
, "Mesa %s DEBUG build %s %s\n",
411 PACKAGE_VERSION
, __DATE__
, __TIME__
);
416 _mesa_test_formats();
420 /* per-API one-time init */
421 if (!(api_init_mask
& (1 << ctx
->API
))) {
422 _mesa_init_get_hash(ctx
);
424 _mesa_init_remap_table();
427 api_init_mask
|= 1 << ctx
->API
;
429 _glthread_UNLOCK_MUTEX(OneTimeLock
);
431 /* Hopefully atexit() is widely available. If not, we may need some
434 atexit(_mesa_destroy_shader_compiler
);
441 * Initialize fields of gl_current_attrib (aka ctx->Current.*)
444 _mesa_init_current(struct gl_context
*ctx
)
448 /* Init all to (0,0,0,1) */
449 for (i
= 0; i
< Elements(ctx
->Current
.Attrib
); i
++) {
450 ASSIGN_4V( ctx
->Current
.Attrib
[i
], 0.0, 0.0, 0.0, 1.0 );
453 /* redo special cases: */
454 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_WEIGHT
], 1.0, 0.0, 0.0, 0.0 );
455 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
], 0.0, 0.0, 1.0, 1.0 );
456 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], 1.0, 1.0, 1.0, 1.0 );
457 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
], 0.0, 0.0, 0.0, 1.0 );
458 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
], 1.0, 0.0, 0.0, 1.0 );
459 ASSIGN_4V( ctx
->Current
.Attrib
[VERT_ATTRIB_EDGEFLAG
], 1.0, 0.0, 0.0, 1.0 );
464 * Init vertex/fragment/geometry program limits.
465 * Important: drivers should override these with actual limits.
468 init_program_limits(struct gl_context
*ctx
, GLenum type
,
469 struct gl_program_constants
*prog
)
471 prog
->MaxInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
472 prog
->MaxAluInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
473 prog
->MaxTexInstructions
= MAX_PROGRAM_INSTRUCTIONS
;
474 prog
->MaxTexIndirections
= MAX_PROGRAM_INSTRUCTIONS
;
475 prog
->MaxTemps
= MAX_PROGRAM_TEMPS
;
476 prog
->MaxEnvParams
= MAX_PROGRAM_ENV_PARAMS
;
477 prog
->MaxLocalParams
= MAX_PROGRAM_LOCAL_PARAMS
;
478 prog
->MaxAddressOffset
= MAX_PROGRAM_LOCAL_PARAMS
;
481 case GL_VERTEX_PROGRAM_ARB
:
482 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
483 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
484 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
485 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
487 case GL_FRAGMENT_PROGRAM_ARB
:
488 prog
->MaxParameters
= MAX_NV_FRAGMENT_PROGRAM_PARAMS
;
489 prog
->MaxAttribs
= MAX_NV_FRAGMENT_PROGRAM_INPUTS
;
490 prog
->MaxAddressRegs
= MAX_FRAGMENT_PROGRAM_ADDRESS_REGS
;
491 prog
->MaxUniformComponents
= 4 * MAX_UNIFORMS
;
493 case MESA_GEOMETRY_PROGRAM
:
494 prog
->MaxParameters
= MAX_VERTEX_PROGRAM_PARAMS
;
495 prog
->MaxAttribs
= MAX_VERTEX_GENERIC_ATTRIBS
;
496 prog
->MaxAddressRegs
= MAX_VERTEX_PROGRAM_ADDRESS_REGS
;
497 prog
->MaxUniformComponents
= MAX_GEOMETRY_UNIFORM_COMPONENTS
;
500 assert(0 && "Bad program type in init_program_limits()");
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;
515 /* Set GLSL datatype range/precision info assuming IEEE float values.
516 * Drivers should override these defaults as needed.
518 prog
->MediumFloat
.RangeMin
= 127;
519 prog
->MediumFloat
.RangeMax
= 127;
520 prog
->MediumFloat
.Precision
= 23;
521 prog
->LowFloat
= prog
->HighFloat
= prog
->MediumFloat
;
523 /* Assume ints are stored as floats for now, since this is the least-common
524 * denominator. The OpenGL ES spec implies (page 132) that the precision
525 * of integer types should be 0. Practically speaking, IEEE
526 * single-precision floating point values can only store integers in the
527 * range [-0x01000000, 0x01000000] without loss of precision.
529 prog
->MediumInt
.RangeMin
= 24;
530 prog
->MediumInt
.RangeMax
= 24;
531 prog
->MediumInt
.Precision
= 0;
532 prog
->LowInt
= prog
->HighInt
= prog
->MediumInt
;
534 prog
->MaxUniformBlocks
= 12;
535 prog
->MaxCombinedUniformComponents
= (prog
->MaxUniformComponents
+
536 ctx
->Const
.MaxUniformBlockSize
/ 4 *
537 prog
->MaxUniformBlocks
);
542 * Initialize fields of gl_constants (aka ctx->Const.*).
543 * Use defaults from config.h. The device drivers will often override
544 * some of these values (such as number of texture units).
547 _mesa_init_constants(struct gl_context
*ctx
)
551 /* Constants, may be overriden (usually only reduced) by device drivers */
552 ctx
->Const
.MaxTextureMbytes
= MAX_TEXTURE_MBYTES
;
553 ctx
->Const
.MaxTextureLevels
= MAX_TEXTURE_LEVELS
;
554 ctx
->Const
.Max3DTextureLevels
= MAX_3D_TEXTURE_LEVELS
;
555 ctx
->Const
.MaxCubeTextureLevels
= MAX_CUBE_TEXTURE_LEVELS
;
556 ctx
->Const
.MaxTextureRectSize
= MAX_TEXTURE_RECT_SIZE
;
557 ctx
->Const
.MaxArrayTextureLayers
= MAX_ARRAY_TEXTURE_LAYERS
;
558 ctx
->Const
.MaxTextureCoordUnits
= MAX_TEXTURE_COORD_UNITS
;
559 ctx
->Const
.MaxTextureImageUnits
= MAX_TEXTURE_IMAGE_UNITS
;
560 ctx
->Const
.MaxTextureUnits
= MIN2(ctx
->Const
.MaxTextureCoordUnits
,
561 ctx
->Const
.MaxTextureImageUnits
);
562 ctx
->Const
.MaxTextureMaxAnisotropy
= MAX_TEXTURE_MAX_ANISOTROPY
;
563 ctx
->Const
.MaxTextureLodBias
= MAX_TEXTURE_LOD_BIAS
;
564 ctx
->Const
.MaxTextureBufferSize
= 65536;
565 ctx
->Const
.TextureBufferOffsetAlignment
= 1;
566 ctx
->Const
.MaxArrayLockSize
= MAX_ARRAY_LOCK_SIZE
;
567 ctx
->Const
.SubPixelBits
= SUB_PIXEL_BITS
;
568 ctx
->Const
.MinPointSize
= MIN_POINT_SIZE
;
569 ctx
->Const
.MaxPointSize
= MAX_POINT_SIZE
;
570 ctx
->Const
.MinPointSizeAA
= MIN_POINT_SIZE
;
571 ctx
->Const
.MaxPointSizeAA
= MAX_POINT_SIZE
;
572 ctx
->Const
.PointSizeGranularity
= (GLfloat
) POINT_SIZE_GRANULARITY
;
573 ctx
->Const
.MinLineWidth
= MIN_LINE_WIDTH
;
574 ctx
->Const
.MaxLineWidth
= MAX_LINE_WIDTH
;
575 ctx
->Const
.MinLineWidthAA
= MIN_LINE_WIDTH
;
576 ctx
->Const
.MaxLineWidthAA
= MAX_LINE_WIDTH
;
577 ctx
->Const
.LineWidthGranularity
= (GLfloat
) LINE_WIDTH_GRANULARITY
;
578 ctx
->Const
.MaxColorTableSize
= MAX_COLOR_TABLE_SIZE
;
579 ctx
->Const
.MaxClipPlanes
= 6;
580 ctx
->Const
.MaxLights
= MAX_LIGHTS
;
581 ctx
->Const
.MaxShininess
= 128.0;
582 ctx
->Const
.MaxSpotExponent
= 128.0;
583 ctx
->Const
.MaxViewportWidth
= MAX_VIEWPORT_WIDTH
;
584 ctx
->Const
.MaxViewportHeight
= MAX_VIEWPORT_HEIGHT
;
586 /** GL_ARB_uniform_buffer_object */
587 ctx
->Const
.MaxCombinedUniformBlocks
= 36;
588 ctx
->Const
.MaxUniformBufferBindings
= 36;
589 ctx
->Const
.MaxUniformBlockSize
= 16384;
590 ctx
->Const
.UniformBufferOffsetAlignment
= 1;
592 init_program_limits(ctx
, GL_VERTEX_PROGRAM_ARB
, &ctx
->Const
.VertexProgram
);
593 init_program_limits(ctx
, GL_FRAGMENT_PROGRAM_ARB
, &ctx
->Const
.FragmentProgram
);
594 init_program_limits(ctx
, MESA_GEOMETRY_PROGRAM
, &ctx
->Const
.GeometryProgram
);
596 ctx
->Const
.MaxProgramMatrices
= MAX_PROGRAM_MATRICES
;
597 ctx
->Const
.MaxProgramMatrixStackDepth
= MAX_PROGRAM_MATRIX_STACK_DEPTH
;
599 /* CheckArrayBounds is overriden by drivers/x11 for X server */
600 ctx
->Const
.CheckArrayBounds
= GL_FALSE
;
602 /* GL_ARB_draw_buffers */
603 ctx
->Const
.MaxDrawBuffers
= MAX_DRAW_BUFFERS
;
605 ctx
->Const
.MaxColorAttachments
= MAX_COLOR_ATTACHMENTS
;
606 ctx
->Const
.MaxRenderbufferSize
= MAX_RENDERBUFFER_SIZE
;
608 ctx
->Const
.MaxVertexTextureImageUnits
= MAX_VERTEX_TEXTURE_IMAGE_UNITS
;
609 ctx
->Const
.MaxCombinedTextureImageUnits
= MAX_COMBINED_TEXTURE_IMAGE_UNITS
;
610 ctx
->Const
.MaxVarying
= 16; /* old limit not to break tnl and swrast */
611 ctx
->Const
.MaxGeometryTextureImageUnits
= MAX_GEOMETRY_TEXTURE_IMAGE_UNITS
;
612 ctx
->Const
.MaxVertexVaryingComponents
= MAX_VERTEX_VARYING_COMPONENTS
;
613 ctx
->Const
.MaxGeometryVaryingComponents
= MAX_GEOMETRY_VARYING_COMPONENTS
;
614 ctx
->Const
.MaxGeometryOutputVertices
= MAX_GEOMETRY_OUTPUT_VERTICES
;
615 ctx
->Const
.MaxGeometryTotalOutputComponents
= MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS
;
617 /* Shading language version */
618 if (_mesa_is_desktop_gl(ctx
)) {
619 ctx
->Const
.GLSLVersion
= 120;
620 _mesa_override_glsl_version(ctx
);
622 else if (ctx
->API
== API_OPENGLES2
) {
623 ctx
->Const
.GLSLVersion
= 100;
625 else if (ctx
->API
== API_OPENGLES
) {
626 ctx
->Const
.GLSLVersion
= 0; /* GLSL not supported */
629 /* GL_ARB_framebuffer_object */
630 ctx
->Const
.MaxSamples
= 0;
633 ctx
->Const
.MaxServerWaitTimeout
= (GLuint64
) ~0;
635 /* GL_ATI_envmap_bumpmap */
636 ctx
->Const
.SupportedBumpUnits
= SUPPORTED_ATI_BUMP_UNITS
;
638 /* GL_EXT_provoking_vertex */
639 ctx
->Const
.QuadsFollowProvokingVertexConvention
= GL_TRUE
;
641 /* GL_EXT_transform_feedback */
642 ctx
->Const
.MaxTransformFeedbackBuffers
= MAX_FEEDBACK_BUFFERS
;
643 ctx
->Const
.MaxTransformFeedbackSeparateComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
644 ctx
->Const
.MaxTransformFeedbackInterleavedComponents
= 4 * MAX_FEEDBACK_ATTRIBS
;
645 ctx
->Const
.MaxVertexStreams
= 1;
647 /* GL 3.2: hard-coded for now: */
648 ctx
->Const
.ProfileMask
= GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
;
650 /** GL_EXT_gpu_shader4 */
651 ctx
->Const
.MinProgramTexelOffset
= -8;
652 ctx
->Const
.MaxProgramTexelOffset
= 7;
654 /* GL_ARB_robustness */
655 ctx
->Const
.ResetStrategy
= GL_NO_RESET_NOTIFICATION_ARB
;
657 /* PrimitiveRestart */
658 ctx
->Const
.PrimitiveRestartInSoftware
= GL_FALSE
;
660 /* ES 3.0 or ARB_ES3_compatibility */
661 ctx
->Const
.MaxElementIndex
= 0xffffffffu
;
663 /* GL_ARB_texture_multisample */
664 ctx
->Const
.MaxColorTextureSamples
= 1;
665 ctx
->Const
.MaxDepthTextureSamples
= 1;
666 ctx
->Const
.MaxIntegerSamples
= 1;
671 * Do some sanity checks on the limits/constants for the given context.
672 * Only called the first time a context is bound.
675 check_context_limits(struct gl_context
*ctx
)
677 /* check that we don't exceed the size of various bitfields */
678 assert(VARYING_SLOT_MAX
<=
679 (8 * sizeof(ctx
->VertexProgram
._Current
->Base
.OutputsWritten
)));
680 assert(FRAG_ATTRIB_MAX
<=
681 (8 * sizeof(ctx
->FragmentProgram
._Current
->Base
.InputsRead
)));
683 assert(MAX_COMBINED_TEXTURE_IMAGE_UNITS
<= 8 * sizeof(GLbitfield
));
685 /* shader-related checks */
686 assert(ctx
->Const
.FragmentProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
687 assert(ctx
->Const
.VertexProgram
.MaxLocalParams
<= MAX_PROGRAM_LOCAL_PARAMS
);
689 /* Texture unit checks */
690 assert(ctx
->Const
.MaxTextureImageUnits
> 0);
691 assert(ctx
->Const
.MaxTextureImageUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
692 assert(ctx
->Const
.MaxTextureCoordUnits
> 0);
693 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_TEXTURE_COORD_UNITS
);
694 assert(ctx
->Const
.MaxTextureUnits
> 0);
695 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_IMAGE_UNITS
);
696 assert(ctx
->Const
.MaxTextureUnits
<= MAX_TEXTURE_COORD_UNITS
);
697 assert(ctx
->Const
.MaxTextureUnits
== MIN2(ctx
->Const
.MaxTextureImageUnits
,
698 ctx
->Const
.MaxTextureCoordUnits
));
699 assert(ctx
->Const
.MaxCombinedTextureImageUnits
> 0);
700 assert(ctx
->Const
.MaxCombinedTextureImageUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
701 assert(ctx
->Const
.MaxTextureCoordUnits
<= MAX_COMBINED_TEXTURE_IMAGE_UNITS
);
702 /* number of coord units cannot be greater than number of image units */
703 assert(ctx
->Const
.MaxTextureCoordUnits
<= ctx
->Const
.MaxTextureImageUnits
);
706 /* Texture size checks */
707 assert(ctx
->Const
.MaxTextureLevels
<= MAX_TEXTURE_LEVELS
);
708 assert(ctx
->Const
.Max3DTextureLevels
<= MAX_3D_TEXTURE_LEVELS
);
709 assert(ctx
->Const
.MaxCubeTextureLevels
<= MAX_CUBE_TEXTURE_LEVELS
);
710 assert(ctx
->Const
.MaxTextureRectSize
<= MAX_TEXTURE_RECT_SIZE
);
712 /* Texture level checks */
713 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
714 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
716 /* Max texture size should be <= max viewport size (render to texture) */
717 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
718 <= ctx
->Const
.MaxViewportWidth
);
719 assert((1U << (ctx
->Const
.MaxTextureLevels
- 1))
720 <= ctx
->Const
.MaxViewportHeight
);
722 assert(ctx
->Const
.MaxDrawBuffers
<= MAX_DRAW_BUFFERS
);
724 /* if this fails, add more enum values to gl_buffer_index */
725 assert(BUFFER_COLOR0
+ MAX_DRAW_BUFFERS
<= BUFFER_COUNT
);
727 /* XXX probably add more tests */
732 * Initialize the attribute groups in a GL context.
734 * \param ctx GL context.
736 * Initializes all the attributes, calling the respective <tt>init*</tt>
737 * functions for the more complex data structures.
740 init_attrib_groups(struct gl_context
*ctx
)
745 _mesa_init_constants( ctx
);
748 _mesa_init_extensions( ctx
);
750 /* Attribute Groups */
751 _mesa_init_accum( ctx
);
752 _mesa_init_attrib( ctx
);
753 _mesa_init_buffer_objects( ctx
);
754 _mesa_init_color( ctx
);
755 _mesa_init_current( ctx
);
756 _mesa_init_depth( ctx
);
757 _mesa_init_debug( ctx
);
758 _mesa_init_display_list( ctx
);
759 _mesa_init_errors( ctx
);
760 _mesa_init_eval( ctx
);
761 _mesa_init_fbobjects( ctx
);
762 _mesa_init_feedback( ctx
);
763 _mesa_init_fog( ctx
);
764 _mesa_init_hint( ctx
);
765 _mesa_init_line( ctx
);
766 _mesa_init_lighting( ctx
);
767 _mesa_init_matrix( ctx
);
768 _mesa_init_multisample( ctx
);
769 _mesa_init_pixel( ctx
);
770 _mesa_init_pixelstore( ctx
);
771 _mesa_init_point( ctx
);
772 _mesa_init_polygon( ctx
);
773 _mesa_init_program( ctx
);
774 _mesa_init_queryobj( ctx
);
775 _mesa_init_sync( ctx
);
776 _mesa_init_rastpos( ctx
);
777 _mesa_init_scissor( ctx
);
778 _mesa_init_shader_state( ctx
);
779 _mesa_init_stencil( ctx
);
780 _mesa_init_transform( ctx
);
781 _mesa_init_transform_feedback( ctx
);
782 _mesa_init_varray( ctx
);
783 _mesa_init_viewport( ctx
);
785 if (!_mesa_init_texture( ctx
))
788 _mesa_init_texture_s3tc( ctx
);
791 ctx
->NewState
= _NEW_ALL
;
792 ctx
->NewDriverState
= ~0;
793 ctx
->ErrorValue
= GL_NO_ERROR
;
794 ctx
->ResetStatus
= GL_NO_ERROR
;
795 ctx
->varying_vp_inputs
= VERT_BIT_ALL
;
802 * Update default objects in a GL context with respect to shared state.
804 * \param ctx GL context.
806 * Removes references to old default objects, (texture objects, program
807 * objects, etc.) and changes to reference those from the current shared
811 update_default_objects(struct gl_context
*ctx
)
815 _mesa_update_default_objects_program(ctx
);
816 _mesa_update_default_objects_texture(ctx
);
817 _mesa_update_default_objects_buffer_objects(ctx
);
824 * This is the default function we plug into all dispatch table slots
825 * This helps prevents a segfault when someone calls a GL function without
826 * first checking if the extension's supported.
829 _mesa_generic_nop(void)
831 GET_CURRENT_CONTEXT(ctx
);
832 _mesa_error(ctx
, GL_INVALID_OPERATION
,
833 "unsupported function called "
834 "(unsupported extension or deprecated function?)");
840 * Allocate and initialize a new dispatch table.
842 struct _glapi_table
*
843 _mesa_alloc_dispatch_table()
845 /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
846 * In practice, this'll be the same for stand-alone Mesa. But for DRI
847 * Mesa we do this to accomodate different versions of libGL and various
850 GLint numEntries
= MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT
);
851 struct _glapi_table
*table
;
853 table
= malloc(numEntries
* sizeof(_glapi_proc
));
855 _glapi_proc
*entry
= (_glapi_proc
*) table
;
857 for (i
= 0; i
< numEntries
; i
++) {
858 entry
[i
] = (_glapi_proc
) _mesa_generic_nop
;
865 * Creates a minimal dispatch table for use within glBegin()/glEnd().
867 * This ensures that we generate GL_INVALID_OPERATION errors from most
868 * functions, since the set of functions that are valid within Begin/End is
871 * From the GL 1.0 specification section 2.6.3, "GL Commands within
874 * "The only GL commands that are allowed within any Begin/End pairs are
875 * the commands for specifying vertex coordinates, vertex color, normal
876 * coordinates, and texture coordinates (Vertex, Color, Index, Normal,
877 * TexCoord), EvalCoord and EvalPoint commands (see section 5.1),
878 * commands for specifying lighting material parameters (Material
879 * commands see section 2.12.2), display list invocation commands
880 * (CallList and CallLists see section 5.4), and the EdgeFlag
881 * command. Executing Begin after Begin has already been executed but
882 * before an End is issued generates the INVALID OPERATION error, as does
883 * executing End without a previous corresponding Begin. Executing any
884 * other GL command within Begin/End results in the error INVALID
887 * The table entries for specifying vertex attributes are set up by
888 * install_vtxfmt() and _mesa_loopback_init_api_table(), and End() and dlists
889 * are set by install_vtxfmt() as well.
891 static struct _glapi_table
*
892 create_beginend_table(const struct gl_context
*ctx
)
894 struct _glapi_table
*table
;
896 table
= _mesa_alloc_dispatch_table();
900 /* Fill in functions which return a value, since they should return some
901 * specific value even if they emit a GL_INVALID_OPERATION error from them
902 * being called within glBegin()/glEnd().
904 #define COPY_DISPATCH(func) SET_##func(table, GET_##func(ctx->Exec))
906 COPY_DISPATCH(GenLists
);
907 COPY_DISPATCH(IsProgram
);
908 COPY_DISPATCH(IsVertexArray
);
909 COPY_DISPATCH(IsBuffer
);
910 COPY_DISPATCH(IsEnabled
);
911 COPY_DISPATCH(IsEnabledi
);
912 COPY_DISPATCH(IsRenderbuffer
);
913 COPY_DISPATCH(IsFramebuffer
);
914 COPY_DISPATCH(CheckFramebufferStatus
);
915 COPY_DISPATCH(RenderMode
);
916 COPY_DISPATCH(GetString
);
917 COPY_DISPATCH(GetStringi
);
918 COPY_DISPATCH(GetPointerv
);
919 COPY_DISPATCH(IsQuery
);
920 COPY_DISPATCH(IsSampler
);
921 COPY_DISPATCH(IsSync
);
922 COPY_DISPATCH(IsTexture
);
923 COPY_DISPATCH(IsTransformFeedback
);
924 COPY_DISPATCH(DeleteQueries
);
925 COPY_DISPATCH(AreTexturesResident
);
926 COPY_DISPATCH(FenceSync
);
927 COPY_DISPATCH(ClientWaitSync
);
928 COPY_DISPATCH(MapBuffer
);
929 COPY_DISPATCH(UnmapBuffer
);
930 COPY_DISPATCH(MapBufferRange
);
931 COPY_DISPATCH(MapBufferRange
);
932 COPY_DISPATCH(ObjectPurgeableAPPLE
);
933 COPY_DISPATCH(ObjectUnpurgeableAPPLE
);
935 _mesa_loopback_init_api_table(ctx
, table
);
941 _mesa_initialize_dispatch_tables(struct gl_context
*ctx
)
943 /* Do the code-generated setup of the exec table in api_exec.c. */
944 _mesa_initialize_exec_table(ctx
);
947 _mesa_initialize_save_table(ctx
);
951 * Initialize a struct gl_context struct (rendering context).
953 * This includes allocating all the other structs and arrays which hang off of
954 * the context by pointers.
955 * Note that the driver needs to pass in its dd_function_table here since
956 * we need to at least call driverFunctions->NewTextureObject to create the
957 * default texture objects.
959 * Called by _mesa_create_context().
961 * Performs the imports and exports callback tables initialization, and
962 * miscellaneous one-time initializations. If no shared context is supplied one
963 * is allocated, and increase its reference count. Setups the GL API dispatch
964 * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
965 * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
968 * \param ctx the context to initialize
969 * \param api the GL API type to create the context for
970 * \param visual describes the visual attributes for this context
971 * \param share_list points to context to share textures, display lists,
973 * \param driverFunctions table of device driver functions for this context
977 _mesa_initialize_context(struct gl_context
*ctx
,
979 const struct gl_config
*visual
,
980 struct gl_context
*share_list
,
981 const struct dd_function_table
*driverFunctions
)
983 struct gl_shared_state
*shared
;
986 assert(driverFunctions
->NewTextureObject
);
987 assert(driverFunctions
->FreeTextureImageBuffer
);
990 ctx
->Visual
= *visual
;
991 ctx
->DrawBuffer
= NULL
;
992 ctx
->ReadBuffer
= NULL
;
993 ctx
->WinSysDrawBuffer
= NULL
;
994 ctx
->WinSysReadBuffer
= NULL
;
996 if (_mesa_is_desktop_gl(ctx
)) {
997 _mesa_override_gl_version(ctx
);
1000 /* misc one-time initializations */
1003 /* Plug in driver functions and context pointer here.
1004 * This is important because when we call alloc_shared_state() below
1005 * we'll call ctx->Driver.NewTextureObject() to create the default
1008 ctx
->Driver
= *driverFunctions
;
1011 /* share state with another context */
1012 shared
= share_list
->Shared
;
1015 /* allocate new, unshared state */
1016 shared
= _mesa_alloc_shared_state(ctx
);
1021 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, shared
);
1023 if (!init_attrib_groups( ctx
))
1026 /* setup the API dispatch tables with all nop functions */
1027 ctx
->OutsideBeginEnd
= _mesa_alloc_dispatch_table();
1028 if (!ctx
->OutsideBeginEnd
)
1030 ctx
->Exec
= ctx
->OutsideBeginEnd
;
1031 ctx
->CurrentDispatch
= ctx
->OutsideBeginEnd
;
1033 ctx
->FragmentProgram
._MaintainTexEnvProgram
1034 = (_mesa_getenv("MESA_TEX_PROG") != NULL
);
1036 ctx
->VertexProgram
._MaintainTnlProgram
1037 = (_mesa_getenv("MESA_TNL_PROG") != NULL
);
1038 if (ctx
->VertexProgram
._MaintainTnlProgram
) {
1039 /* this is required... */
1040 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1043 /* Mesa core handles all the formats that mesa core knows about.
1044 * Drivers will want to override this list with just the formats
1045 * they can handle, and confirm that appropriate fallbacks exist in
1046 * _mesa_choose_tex_format().
1048 memset(&ctx
->TextureFormatSupported
, GL_TRUE
,
1049 sizeof(ctx
->TextureFormatSupported
));
1052 case API_OPENGL_COMPAT
:
1053 ctx
->BeginEnd
= create_beginend_table(ctx
);
1054 ctx
->Save
= _mesa_alloc_dispatch_table();
1055 if (!ctx
->BeginEnd
|| !ctx
->Save
)
1059 case API_OPENGL_CORE
:
1063 * GL_OES_texture_cube_map says
1064 * "Initially all texture generation modes are set to REFLECTION_MAP_OES"
1066 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
1067 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
1068 texUnit
->GenS
.Mode
= GL_REFLECTION_MAP_NV
;
1069 texUnit
->GenT
.Mode
= GL_REFLECTION_MAP_NV
;
1070 texUnit
->GenR
.Mode
= GL_REFLECTION_MAP_NV
;
1071 texUnit
->GenS
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1072 texUnit
->GenT
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1073 texUnit
->GenR
._ModeBit
= TEXGEN_REFLECTION_MAP_NV
;
1077 ctx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1078 ctx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1082 ctx
->FirstTimeCurrent
= GL_TRUE
;
1087 free(ctx
->BeginEnd
);
1095 * Allocate and initialize a struct gl_context structure.
1096 * Note that the driver needs to pass in its dd_function_table here since
1097 * we need to at least call driverFunctions->NewTextureObject to initialize
1098 * the rendering context.
1100 * \param api the GL API type to create the context for
1101 * \param visual a struct gl_config pointer (we copy the struct contents)
1102 * \param share_list another context to share display lists with or NULL
1103 * \param driverFunctions points to the dd_function_table into which the
1104 * driver has plugged in all its special functions.
1106 * \return pointer to a new __struct gl_contextRec or NULL if error.
1109 _mesa_create_context(gl_api api
,
1110 const struct gl_config
*visual
,
1111 struct gl_context
*share_list
,
1112 const struct dd_function_table
*driverFunctions
)
1114 struct gl_context
*ctx
;
1118 ctx
= calloc(1, sizeof(struct gl_context
));
1122 if (_mesa_initialize_context(ctx
, api
, visual
, share_list
,
1134 * Free the data associated with the given context.
1136 * But doesn't free the struct gl_context struct itself.
1138 * \sa _mesa_initialize_context() and init_attrib_groups().
1141 _mesa_free_context_data( struct gl_context
*ctx
)
1143 if (!_mesa_get_current_context()){
1144 /* No current context, but we may need one in order to delete
1145 * texture objs, etc. So temporarily bind the context now.
1147 _mesa_make_current(ctx
, NULL
, NULL
);
1150 /* unreference WinSysDraw/Read buffers */
1151 _mesa_reference_framebuffer(&ctx
->WinSysDrawBuffer
, NULL
);
1152 _mesa_reference_framebuffer(&ctx
->WinSysReadBuffer
, NULL
);
1153 _mesa_reference_framebuffer(&ctx
->DrawBuffer
, NULL
);
1154 _mesa_reference_framebuffer(&ctx
->ReadBuffer
, NULL
);
1156 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
1157 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._Current
, NULL
);
1158 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
._TnlProgram
, NULL
);
1160 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
1161 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._Current
, NULL
);
1162 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
._TexEnvProgram
, NULL
);
1164 _mesa_reference_array_object(ctx
, &ctx
->Array
.ArrayObj
, NULL
);
1165 _mesa_reference_array_object(ctx
, &ctx
->Array
.DefaultArrayObj
, NULL
);
1167 _mesa_free_attrib_data(ctx
);
1168 _mesa_free_buffer_objects(ctx
);
1169 _mesa_free_lighting_data( ctx
);
1170 _mesa_free_eval_data( ctx
);
1171 _mesa_free_texture_data( ctx
);
1172 _mesa_free_matrix_data( ctx
);
1173 _mesa_free_viewport_data( ctx
);
1174 _mesa_free_program_data(ctx
);
1175 _mesa_free_shader_state(ctx
);
1176 _mesa_free_queryobj_data(ctx
);
1177 _mesa_free_sync_data(ctx
);
1178 _mesa_free_varray_data(ctx
);
1179 _mesa_free_transform_feedback(ctx
);
1181 _mesa_reference_buffer_object(ctx
, &ctx
->Pack
.BufferObj
, NULL
);
1182 _mesa_reference_buffer_object(ctx
, &ctx
->Unpack
.BufferObj
, NULL
);
1183 _mesa_reference_buffer_object(ctx
, &ctx
->DefaultPacking
.BufferObj
, NULL
);
1184 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
1186 /* free dispatch tables */
1190 /* Shared context state (display lists, textures, etc) */
1191 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, NULL
);
1193 /* needs to be after freeing shared state */
1194 _mesa_free_display_list_data(ctx
);
1196 _mesa_free_errors_data(ctx
);
1198 free((void *)ctx
->Extensions
.String
);
1200 free(ctx
->VersionString
);
1202 /* unbind the context if it's currently bound */
1203 if (ctx
== _mesa_get_current_context()) {
1204 _mesa_make_current(NULL
, NULL
, NULL
);
1210 * Destroy a struct gl_context structure.
1212 * \param ctx GL context.
1214 * Calls _mesa_free_context_data() and frees the gl_context object itself.
1217 _mesa_destroy_context( struct gl_context
*ctx
)
1220 _mesa_free_context_data(ctx
);
1221 free( (void *) ctx
);
1227 * Copy attribute groups from one context to another.
1229 * \param src source context
1230 * \param dst destination context
1231 * \param mask bitwise OR of GL_*_BIT flags
1233 * According to the bits specified in \p mask, copies the corresponding
1234 * attributes from \p src into \p dst. For many of the attributes a simple \c
1235 * memcpy is not enough due to the existence of internal pointers in their data
1239 _mesa_copy_context( const struct gl_context
*src
, struct gl_context
*dst
,
1242 if (mask
& GL_ACCUM_BUFFER_BIT
) {
1244 dst
->Accum
= src
->Accum
;
1246 if (mask
& GL_COLOR_BUFFER_BIT
) {
1248 dst
->Color
= src
->Color
;
1250 if (mask
& GL_CURRENT_BIT
) {
1252 dst
->Current
= src
->Current
;
1254 if (mask
& GL_DEPTH_BUFFER_BIT
) {
1256 dst
->Depth
= src
->Depth
;
1258 if (mask
& GL_ENABLE_BIT
) {
1261 if (mask
& GL_EVAL_BIT
) {
1263 dst
->Eval
= src
->Eval
;
1265 if (mask
& GL_FOG_BIT
) {
1267 dst
->Fog
= src
->Fog
;
1269 if (mask
& GL_HINT_BIT
) {
1271 dst
->Hint
= src
->Hint
;
1273 if (mask
& GL_LIGHTING_BIT
) {
1275 /* begin with memcpy */
1276 dst
->Light
= src
->Light
;
1277 /* fixup linked lists to prevent pointer insanity */
1278 make_empty_list( &(dst
->Light
.EnabledList
) );
1279 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1280 if (dst
->Light
.Light
[i
].Enabled
) {
1281 insert_at_tail(&(dst
->Light
.EnabledList
), &(dst
->Light
.Light
[i
]));
1285 if (mask
& GL_LINE_BIT
) {
1287 dst
->Line
= src
->Line
;
1289 if (mask
& GL_LIST_BIT
) {
1291 dst
->List
= src
->List
;
1293 if (mask
& GL_PIXEL_MODE_BIT
) {
1295 dst
->Pixel
= src
->Pixel
;
1297 if (mask
& GL_POINT_BIT
) {
1299 dst
->Point
= src
->Point
;
1301 if (mask
& GL_POLYGON_BIT
) {
1303 dst
->Polygon
= src
->Polygon
;
1305 if (mask
& GL_POLYGON_STIPPLE_BIT
) {
1306 /* Use loop instead of memcpy due to problem with Portland Group's
1307 * C compiler. Reported by John Stone.
1310 for (i
= 0; i
< 32; i
++) {
1311 dst
->PolygonStipple
[i
] = src
->PolygonStipple
[i
];
1314 if (mask
& GL_SCISSOR_BIT
) {
1316 dst
->Scissor
= src
->Scissor
;
1318 if (mask
& GL_STENCIL_BUFFER_BIT
) {
1320 dst
->Stencil
= src
->Stencil
;
1322 if (mask
& GL_TEXTURE_BIT
) {
1323 /* Cannot memcpy because of pointers */
1324 _mesa_copy_texture_state(src
, dst
);
1326 if (mask
& GL_TRANSFORM_BIT
) {
1328 dst
->Transform
= src
->Transform
;
1330 if (mask
& GL_VIEWPORT_BIT
) {
1331 /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
1332 dst
->Viewport
.X
= src
->Viewport
.X
;
1333 dst
->Viewport
.Y
= src
->Viewport
.Y
;
1334 dst
->Viewport
.Width
= src
->Viewport
.Width
;
1335 dst
->Viewport
.Height
= src
->Viewport
.Height
;
1336 dst
->Viewport
.Near
= src
->Viewport
.Near
;
1337 dst
->Viewport
.Far
= src
->Viewport
.Far
;
1338 _math_matrix_copy(&dst
->Viewport
._WindowMap
, &src
->Viewport
._WindowMap
);
1341 /* XXX FIXME: Call callbacks?
1343 dst
->NewState
= _NEW_ALL
;
1344 dst
->NewDriverState
= ~0;
1349 * Check if the given context can render into the given framebuffer
1350 * by checking visual attributes.
1352 * Most of these tests could go away because Mesa is now pretty flexible
1353 * in terms of mixing rendering contexts with framebuffers. As long
1354 * as RGB vs. CI mode agree, we're probably good.
1356 * \return GL_TRUE if compatible, GL_FALSE otherwise.
1359 check_compatible(const struct gl_context
*ctx
,
1360 const struct gl_framebuffer
*buffer
)
1362 const struct gl_config
*ctxvis
= &ctx
->Visual
;
1363 const struct gl_config
*bufvis
= &buffer
->Visual
;
1365 if (buffer
== _mesa_get_incomplete_framebuffer())
1369 /* disabling this fixes the fgl_glxgears pbuffer demo */
1370 if (ctxvis
->doubleBufferMode
&& !bufvis
->doubleBufferMode
)
1373 if (ctxvis
->stereoMode
&& !bufvis
->stereoMode
)
1375 if (ctxvis
->haveAccumBuffer
&& !bufvis
->haveAccumBuffer
)
1377 if (ctxvis
->haveDepthBuffer
&& !bufvis
->haveDepthBuffer
)
1379 if (ctxvis
->haveStencilBuffer
&& !bufvis
->haveStencilBuffer
)
1381 if (ctxvis
->redMask
&& ctxvis
->redMask
!= bufvis
->redMask
)
1383 if (ctxvis
->greenMask
&& ctxvis
->greenMask
!= bufvis
->greenMask
)
1385 if (ctxvis
->blueMask
&& ctxvis
->blueMask
!= bufvis
->blueMask
)
1388 /* disabled (see bug 11161) */
1389 if (ctxvis
->depthBits
&& ctxvis
->depthBits
!= bufvis
->depthBits
)
1392 if (ctxvis
->stencilBits
&& ctxvis
->stencilBits
!= bufvis
->stencilBits
)
1400 * Do one-time initialization for the given framebuffer. Specifically,
1401 * ask the driver for the window's current size and update the framebuffer
1403 * Really, the device driver should totally take care of this.
1406 initialize_framebuffer_size(struct gl_context
*ctx
, struct gl_framebuffer
*fb
)
1408 GLuint width
, height
;
1409 if (ctx
->Driver
.GetBufferSize
) {
1410 ctx
->Driver
.GetBufferSize(fb
, &width
, &height
);
1411 if (ctx
->Driver
.ResizeBuffers
)
1412 ctx
->Driver
.ResizeBuffers(ctx
, fb
, width
, height
);
1413 fb
->Initialized
= GL_TRUE
;
1419 * Check if the viewport/scissor size has not yet been initialized.
1420 * Initialize the size if the given width and height are non-zero.
1423 _mesa_check_init_viewport(struct gl_context
*ctx
, GLuint width
, GLuint height
)
1425 if (!ctx
->ViewportInitialized
&& width
> 0 && height
> 0) {
1426 /* Note: set flag here, before calling _mesa_set_viewport(), to prevent
1427 * potential infinite recursion.
1429 ctx
->ViewportInitialized
= GL_TRUE
;
1430 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
1431 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
1437 * Bind the given context to the given drawBuffer and readBuffer and
1438 * make it the current context for the calling thread.
1439 * We'll render into the drawBuffer and read pixels from the
1440 * readBuffer (i.e. glRead/CopyPixels, glCopyTexImage, etc).
1442 * We check that the context's and framebuffer's visuals are compatible
1443 * and return immediately if they're not.
1445 * \param newCtx the new GL context. If NULL then there will be no current GL
1447 * \param drawBuffer the drawing framebuffer
1448 * \param readBuffer the reading framebuffer
1451 _mesa_make_current( struct gl_context
*newCtx
,
1452 struct gl_framebuffer
*drawBuffer
,
1453 struct gl_framebuffer
*readBuffer
)
1455 GET_CURRENT_CONTEXT(curCtx
);
1457 if (MESA_VERBOSE
& VERBOSE_API
)
1458 _mesa_debug(newCtx
, "_mesa_make_current()\n");
1460 /* Check that the context's and framebuffer's visuals are compatible.
1462 if (newCtx
&& drawBuffer
&& newCtx
->WinSysDrawBuffer
!= drawBuffer
) {
1463 if (!check_compatible(newCtx
, drawBuffer
)) {
1464 _mesa_warning(newCtx
,
1465 "MakeCurrent: incompatible visuals for context and drawbuffer");
1469 if (newCtx
&& readBuffer
&& newCtx
->WinSysReadBuffer
!= readBuffer
) {
1470 if (!check_compatible(newCtx
, readBuffer
)) {
1471 _mesa_warning(newCtx
,
1472 "MakeCurrent: incompatible visuals for context and readbuffer");
1478 (curCtx
->WinSysDrawBuffer
|| curCtx
->WinSysReadBuffer
) &&
1479 /* make sure this context is valid for flushing */
1481 _mesa_flush(curCtx
);
1483 /* We used to call _glapi_check_multithread() here. Now do it in drivers */
1484 _glapi_set_context((void *) newCtx
);
1485 ASSERT(_mesa_get_current_context() == newCtx
);
1488 _glapi_set_dispatch(NULL
); /* none current */
1491 _glapi_set_dispatch(newCtx
->CurrentDispatch
);
1493 if (drawBuffer
&& readBuffer
) {
1494 ASSERT(_mesa_is_winsys_fbo(drawBuffer
));
1495 ASSERT(_mesa_is_winsys_fbo(readBuffer
));
1496 _mesa_reference_framebuffer(&newCtx
->WinSysDrawBuffer
, drawBuffer
);
1497 _mesa_reference_framebuffer(&newCtx
->WinSysReadBuffer
, readBuffer
);
1500 * Only set the context's Draw/ReadBuffer fields if they're NULL
1501 * or not bound to a user-created FBO.
1503 if (!newCtx
->DrawBuffer
|| _mesa_is_winsys_fbo(newCtx
->DrawBuffer
)) {
1504 _mesa_reference_framebuffer(&newCtx
->DrawBuffer
, drawBuffer
);
1505 /* Update the FBO's list of drawbuffers/renderbuffers.
1506 * For winsys FBOs this comes from the GL state (which may have
1507 * changed since the last time this FBO was bound).
1509 _mesa_update_draw_buffers(newCtx
);
1511 if (!newCtx
->ReadBuffer
|| _mesa_is_winsys_fbo(newCtx
->ReadBuffer
)) {
1512 _mesa_reference_framebuffer(&newCtx
->ReadBuffer
, readBuffer
);
1515 /* XXX only set this flag if we're really changing the draw/read
1516 * framebuffer bindings.
1518 newCtx
->NewState
|= _NEW_BUFFERS
;
1521 /* We want to get rid of these lines: */
1522 if (!drawBuffer
->Initialized
) {
1523 initialize_framebuffer_size(newCtx
, drawBuffer
);
1525 if (readBuffer
!= drawBuffer
&& !readBuffer
->Initialized
) {
1526 initialize_framebuffer_size(newCtx
, readBuffer
);
1529 _mesa_resizebuffers(newCtx
);
1531 /* We want the drawBuffer and readBuffer to be initialized by
1533 * This generally means the Width and Height match the actual
1534 * window size and the renderbuffers (both hardware and software
1535 * based) are allocated to match. The later can generally be
1536 * done with a call to _mesa_resize_framebuffer().
1538 * It's theoretically possible for a buffer to have zero width
1539 * or height, but for now, assert check that the driver did what's
1542 ASSERT(drawBuffer
->Width
> 0);
1543 ASSERT(drawBuffer
->Height
> 0);
1547 _mesa_check_init_viewport(newCtx
,
1548 drawBuffer
->Width
, drawBuffer
->Height
);
1552 if (newCtx
->FirstTimeCurrent
) {
1553 assert(newCtx
->Version
> 0);
1555 newCtx
->Extensions
.String
= _mesa_make_extension_string(newCtx
);
1557 check_context_limits(newCtx
);
1559 /* We can use this to help debug user's problems. Tell them to set
1560 * the MESA_INFO env variable before running their app. Then the
1561 * first time each context is made current we'll print some useful
1564 if (_mesa_getenv("MESA_INFO")) {
1568 newCtx
->FirstTimeCurrent
= GL_FALSE
;
1577 * Make context 'ctx' share the display lists, textures and programs
1578 * that are associated with 'ctxToShare'.
1579 * Any display lists, textures or programs associated with 'ctx' will
1580 * be deleted if nobody else is sharing them.
1583 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
)
1585 if (ctx
&& ctxToShare
&& ctx
->Shared
&& ctxToShare
->Shared
) {
1586 struct gl_shared_state
*oldShared
= NULL
;
1588 /* save ref to old state to prevent it from being deleted immediately */
1589 _mesa_reference_shared_state(ctx
, &oldShared
, ctx
->Shared
);
1591 /* update ctx's Shared pointer */
1592 _mesa_reference_shared_state(ctx
, &ctx
->Shared
, ctxToShare
->Shared
);
1594 update_default_objects(ctx
);
1596 /* release the old shared state */
1597 _mesa_reference_shared_state(ctx
, &oldShared
, NULL
);
1609 * \return pointer to the current GL context for this thread.
1611 * Calls _glapi_get_context(). This isn't the fastest way to get the current
1612 * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in
1616 _mesa_get_current_context( void )
1618 return (struct gl_context
*) _glapi_get_context();
1623 * Get context's current API dispatch table.
1625 * It'll either be the immediate-mode execute dispatcher or the display list
1626 * compile dispatcher.
1628 * \param ctx GL context.
1630 * \return pointer to dispatch_table.
1632 * Simply returns __struct gl_contextRec::CurrentDispatch.
1634 struct _glapi_table
*
1635 _mesa_get_dispatch(struct gl_context
*ctx
)
1637 return ctx
->CurrentDispatch
;
1643 /**********************************************************************/
1644 /** \name Miscellaneous functions */
1645 /**********************************************************************/
1651 * \param ctx GL context.
1652 * \param error error code.
1654 * Records the given error code and call the driver's dd_function_table::Error
1655 * function if defined.
1658 * This is called via _mesa_error().
1661 _mesa_record_error(struct gl_context
*ctx
, GLenum error
)
1666 if (ctx
->ErrorValue
== GL_NO_ERROR
) {
1667 ctx
->ErrorValue
= error
;
1673 * Flush commands and wait for completion.
1676 _mesa_finish(struct gl_context
*ctx
)
1678 FLUSH_VERTICES( ctx
, 0 );
1679 FLUSH_CURRENT( ctx
, 0 );
1680 if (ctx
->Driver
.Finish
) {
1681 ctx
->Driver
.Finish(ctx
);
1690 _mesa_flush(struct gl_context
*ctx
)
1692 FLUSH_VERTICES( ctx
, 0 );
1693 FLUSH_CURRENT( ctx
, 0 );
1694 if (ctx
->Driver
.Flush
) {
1695 ctx
->Driver
.Flush(ctx
);
1702 * Execute glFinish().
1704 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1705 * dd_function_table::Finish driver callback, if not NULL.
1710 GET_CURRENT_CONTEXT(ctx
);
1711 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1717 * Execute glFlush().
1719 * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
1720 * dd_function_table::Flush driver callback, if not NULL.
1725 GET_CURRENT_CONTEXT(ctx
);
1726 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1732 * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over
1733 * MUL/MAD, or vice versa, call this function to register that.
1734 * Otherwise we default to MUL/MAD.
1737 _mesa_set_mvp_with_dp4( struct gl_context
*ctx
,
1740 ctx
->mvp_with_dp4
= flag
;
1744 * ARB_blend_func_extended - ERRORS section
1745 * "The error INVALID_OPERATION is generated by Begin or any procedure that
1746 * implicitly calls Begin if any draw buffer has a blend function requiring the
1747 * second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, SRC1_ALPHA or
1748 * ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that has more than
1749 * the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active color attachements."
1752 _mesa_check_blend_func_error(struct gl_context
*ctx
)
1755 for (i
= ctx
->Const
.MaxDualSourceDrawBuffers
;
1756 i
< ctx
->DrawBuffer
->_NumColorDrawBuffers
;
1758 if (ctx
->Color
.Blend
[i
]._UsesDualSrc
) {
1759 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1760 "dual source blend on illegal attachment");
1768 * Prior to drawing anything with glBegin, glDrawArrays, etc. this function
1769 * is called to see if it's valid to render. This involves checking that
1770 * the current shader is valid and the framebuffer is complete.
1771 * If an error is detected it'll be recorded here.
1772 * \return GL_TRUE if OK to render, GL_FALSE if not
1775 _mesa_valid_to_render(struct gl_context
*ctx
, const char *where
)
1777 bool vert_from_glsl_shader
= false;
1778 bool geom_from_glsl_shader
= false;
1779 bool frag_from_glsl_shader
= false;
1781 /* This depends on having up to date derived state (shaders) */
1783 _mesa_update_state(ctx
);
1785 if (ctx
->Shader
.CurrentVertexProgram
) {
1786 vert_from_glsl_shader
= true;
1788 if (!ctx
->Shader
.CurrentVertexProgram
->LinkStatus
) {
1789 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1790 "%s(shader not linked)", where
);
1793 #if 0 /* not normally enabled */
1796 if (!_mesa_validate_shader_program(ctx
,
1797 ctx
->Shader
.CurrentVertexProgram
,
1799 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1800 ctx
->Shader
.CurrentVertexProgram
->Name
, errMsg
);
1806 if (ctx
->Shader
.CurrentGeometryProgram
) {
1807 geom_from_glsl_shader
= true;
1809 if (!ctx
->Shader
.CurrentGeometryProgram
->LinkStatus
) {
1810 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1811 "%s(shader not linked)", where
);
1814 #if 0 /* not normally enabled */
1817 if (!_mesa_validate_shader_program(ctx
,
1818 ctx
->Shader
.CurrentGeometryProgram
,
1820 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1821 ctx
->Shader
.CurrentGeometryProgram
->Name
, errMsg
);
1827 if (ctx
->Shader
.CurrentFragmentProgram
) {
1828 frag_from_glsl_shader
= true;
1830 if (!ctx
->Shader
.CurrentFragmentProgram
->LinkStatus
) {
1831 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1832 "%s(shader not linked)", where
);
1835 #if 0 /* not normally enabled */
1838 if (!_mesa_validate_shader_program(ctx
,
1839 ctx
->Shader
.CurrentFragmentProgram
,
1841 _mesa_warning(ctx
, "Shader program %u is invalid: %s",
1842 ctx
->Shader
.CurrentFragmentProgram
->Name
, errMsg
);
1848 /* Any shader stages that are not supplied by the GLSL shader and have
1849 * assembly shaders enabled must now be validated.
1851 if (!vert_from_glsl_shader
1852 && ctx
->VertexProgram
.Enabled
&& !ctx
->VertexProgram
._Enabled
) {
1853 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1854 "%s(vertex program not valid)", where
);
1858 /* FINISHME: If GL_NV_geometry_program4 is ever supported, the current
1859 * FINISHME: geometry program should validated here.
1861 (void) geom_from_glsl_shader
;
1863 if (!frag_from_glsl_shader
) {
1864 if (ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
) {
1865 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1866 "%s(fragment program not valid)", where
);
1870 /* If drawing to integer-valued color buffers, there must be an
1871 * active fragment shader (GL_EXT_texture_integer).
1873 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->_IntegerColor
) {
1874 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1875 "%s(integer format but no fragment shader)", where
);
1880 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
1881 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
1882 "%s(incomplete framebuffer)", where
);
1886 if (_mesa_check_blend_func_error(ctx
) == GL_FALSE
) {
1891 if (ctx
->Shader
.Flags
& GLSL_LOG
) {
1892 struct gl_shader_program
*shProg
[MESA_SHADER_TYPES
];
1895 shProg
[MESA_SHADER_VERTEX
] = ctx
->Shader
.CurrentVertexProgram
;
1896 shProg
[MESA_SHADER_GEOMETRY
] = ctx
->Shader
.CurrentGeometryProgram
;
1897 shProg
[MESA_SHADER_FRAGMENT
] = ctx
->Shader
.CurrentFragmentProgram
;
1899 for (i
= 0; i
< MESA_SHADER_TYPES
; i
++) {
1900 if (shProg
[i
] == NULL
|| shProg
[i
]->_Used
1901 || shProg
[i
]->_LinkedShaders
[i
] == NULL
)
1904 /* This is the first time this shader is being used.
1905 * Append shader's constants/uniforms to log file.
1907 * Only log data for the program target that matches the shader
1908 * target. It's possible to have a program bound to the vertex
1909 * shader target that also supplied a fragment shader. If that
1910 * program isn't also bound to the fragment shader target we don't
1911 * want to log its fragment data.
1913 _mesa_append_uniforms_to_file(shProg
[i
]->_LinkedShaders
[i
]);
1916 for (i
= 0; i
< MESA_SHADER_TYPES
; i
++) {
1917 if (shProg
[i
] != NULL
)
1918 shProg
[i
]->_Used
= GL_TRUE
;