2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Texture state handling.
32 #include "mfeatures.h"
38 #include "texcompress.h"
42 #include "texenvprogram.h"
48 * Default texture combine environment state. This is used to initialize
49 * a context's texture units and as the basis for converting "classic"
50 * texture environmnets to ARB_texture_env_combine style values.
52 static const struct gl_tex_env_combine_state default_combine_state
= {
53 GL_MODULATE
, GL_MODULATE
,
54 { GL_TEXTURE
, GL_PREVIOUS
, GL_CONSTANT
, GL_CONSTANT
},
55 { GL_TEXTURE
, GL_PREVIOUS
, GL_CONSTANT
, GL_CONSTANT
},
56 { GL_SRC_COLOR
, GL_SRC_COLOR
, GL_SRC_ALPHA
, GL_SRC_ALPHA
},
57 { GL_SRC_ALPHA
, GL_SRC_ALPHA
, GL_SRC_ALPHA
, GL_SRC_ALPHA
},
65 * Used by glXCopyContext to copy texture state from one context to another.
68 _mesa_copy_texture_state( const GLcontext
*src
, GLcontext
*dst
)
75 dst
->Texture
.CurrentUnit
= src
->Texture
.CurrentUnit
;
76 dst
->Texture
._GenFlags
= src
->Texture
._GenFlags
;
77 dst
->Texture
._TexGenEnabled
= src
->Texture
._TexGenEnabled
;
78 dst
->Texture
._TexMatEnabled
= src
->Texture
._TexMatEnabled
;
79 dst
->Texture
.SharedPalette
= src
->Texture
.SharedPalette
;
82 for (u
= 0; u
< src
->Const
.MaxTextureImageUnits
; u
++) {
83 dst
->Texture
.Unit
[u
].Enabled
= src
->Texture
.Unit
[u
].Enabled
;
84 dst
->Texture
.Unit
[u
].EnvMode
= src
->Texture
.Unit
[u
].EnvMode
;
85 COPY_4V(dst
->Texture
.Unit
[u
].EnvColor
, src
->Texture
.Unit
[u
].EnvColor
);
86 dst
->Texture
.Unit
[u
].TexGenEnabled
= src
->Texture
.Unit
[u
].TexGenEnabled
;
87 dst
->Texture
.Unit
[u
].GenS
= src
->Texture
.Unit
[u
].GenS
;
88 dst
->Texture
.Unit
[u
].GenT
= src
->Texture
.Unit
[u
].GenT
;
89 dst
->Texture
.Unit
[u
].GenR
= src
->Texture
.Unit
[u
].GenR
;
90 dst
->Texture
.Unit
[u
].GenQ
= src
->Texture
.Unit
[u
].GenQ
;
91 dst
->Texture
.Unit
[u
].LodBias
= src
->Texture
.Unit
[u
].LodBias
;
93 /* GL_EXT_texture_env_combine */
94 dst
->Texture
.Unit
[u
].Combine
= src
->Texture
.Unit
[u
].Combine
;
96 /* GL_ATI_envmap_bumpmap - need this? */
97 dst
->Texture
.Unit
[u
].BumpTarget
= src
->Texture
.Unit
[u
].BumpTarget
;
98 COPY_4V(dst
->Texture
.Unit
[u
].RotMatrix
, src
->Texture
.Unit
[u
].RotMatrix
);
101 * XXX strictly speaking, we should compare texture names/ids and
102 * bind textures in the dest context according to id. For now, only
103 * copy bindings if the contexts share the same pool of textures to
104 * avoid refcounting bugs.
106 if (dst
->Shared
== src
->Shared
) {
107 /* copy texture object bindings, not contents of texture objects */
108 _mesa_lock_context_textures(dst
);
110 for (tex
= 0; tex
< NUM_TEXTURE_TARGETS
; tex
++) {
111 _mesa_reference_texobj(&dst
->Texture
.Unit
[u
].CurrentTex
[tex
],
112 src
->Texture
.Unit
[u
].CurrentTex
[tex
]);
114 _mesa_unlock_context_textures(dst
);
124 _mesa_print_texunit_state( GLcontext
*ctx
, GLuint unit
)
126 const struct gl_texture_unit
*texUnit
= ctx
->Texture
.Unit
+ unit
;
127 _mesa_printf("Texture Unit %d\n", unit
);
128 _mesa_printf(" GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit
->EnvMode
));
129 _mesa_printf(" GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.ModeRGB
));
130 _mesa_printf(" GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.ModeA
));
131 _mesa_printf(" GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[0]));
132 _mesa_printf(" GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[1]));
133 _mesa_printf(" GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[2]));
134 _mesa_printf(" GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[0]));
135 _mesa_printf(" GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[1]));
136 _mesa_printf(" GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[2]));
137 _mesa_printf(" GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[0]));
138 _mesa_printf(" GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[1]));
139 _mesa_printf(" GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[2]));
140 _mesa_printf(" GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[0]));
141 _mesa_printf(" GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[1]));
142 _mesa_printf(" GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[2]));
143 _mesa_printf(" GL_RGB_SCALE = %d\n", 1 << texUnit
->Combine
.ScaleShiftRGB
);
144 _mesa_printf(" GL_ALPHA_SCALE = %d\n", 1 << texUnit
->Combine
.ScaleShiftA
);
145 _mesa_printf(" GL_TEXTURE_ENV_COLOR = (%f, %f, %f, %f)\n", texUnit
->EnvColor
[0], texUnit
->EnvColor
[1], texUnit
->EnvColor
[2], texUnit
->EnvColor
[3]);
150 /**********************************************************************/
151 /* Texture Environment */
152 /**********************************************************************/
155 * Convert "classic" texture environment to ARB_texture_env_combine style
158 * \param state texture_env_combine state vector to be filled-in.
159 * \param mode Classic texture environment mode (i.e., \c GL_REPLACE,
160 * \c GL_BLEND, \c GL_DECAL, etc.).
161 * \param texBaseFormat Base format of the texture associated with the
165 calculate_derived_texenv( struct gl_tex_env_combine_state
*state
,
166 GLenum mode
, GLenum texBaseFormat
)
171 *state
= default_combine_state
;
173 switch (texBaseFormat
) {
175 state
->SourceRGB
[0] = GL_PREVIOUS
;
178 case GL_LUMINANCE_ALPHA
:
187 state
->SourceA
[0] = GL_PREVIOUS
;
192 "Invalid texBaseFormat 0x%x in calculate_derived_texenv",
197 if (mode
== GL_REPLACE_EXT
)
203 mode_rgb
= (texBaseFormat
== GL_ALPHA
) ? GL_REPLACE
: mode
;
208 mode_rgb
= GL_INTERPOLATE
;
211 state
->SourceA
[0] = GL_PREVIOUS
;
213 /* Having alpha / luminance / intensity textures replace using the
214 * incoming fragment color matches the definition in NV_texture_shader.
215 * The 1.5 spec simply marks these as "undefined".
217 switch (texBaseFormat
) {
220 case GL_LUMINANCE_ALPHA
:
222 state
->SourceRGB
[0] = GL_PREVIOUS
;
227 mode_rgb
= GL_REPLACE
;
230 state
->SourceRGB
[2] = GL_TEXTURE
;
236 mode_rgb
= GL_INTERPOLATE
;
237 mode_a
= GL_MODULATE
;
239 switch (texBaseFormat
) {
241 mode_rgb
= GL_REPLACE
;
244 mode_a
= GL_INTERPOLATE
;
245 state
->SourceA
[0] = GL_CONSTANT
;
246 state
->OperandA
[2] = GL_SRC_ALPHA
;
250 case GL_LUMINANCE_ALPHA
:
254 state
->SourceRGB
[2] = GL_TEXTURE
;
255 state
->SourceA
[2] = GL_TEXTURE
;
256 state
->SourceRGB
[0] = GL_CONSTANT
;
257 state
->OperandRGB
[2] = GL_SRC_COLOR
;
263 mode_rgb
= (texBaseFormat
== GL_ALPHA
) ? GL_REPLACE
: GL_ADD
;
264 mode_a
= (texBaseFormat
== GL_INTENSITY
) ? GL_ADD
: GL_MODULATE
;
269 "Invalid texture env mode 0x%x in calculate_derived_texenv",
274 state
->ModeRGB
= (state
->SourceRGB
[0] != GL_PREVIOUS
)
275 ? mode_rgb
: GL_REPLACE
;
276 state
->ModeA
= (state
->SourceA
[0] != GL_PREVIOUS
)
277 ? mode_a
: GL_REPLACE
;
283 /* GL_ARB_multitexture */
285 _mesa_ActiveTextureARB(GLenum texture
)
287 GET_CURRENT_CONTEXT(ctx
);
288 const GLuint texUnit
= texture
- GL_TEXTURE0
;
289 ASSERT_OUTSIDE_BEGIN_END(ctx
);
291 if (MESA_VERBOSE
& (VERBOSE_API
|VERBOSE_TEXTURE
))
292 _mesa_debug(ctx
, "glActiveTexture %s\n",
293 _mesa_lookup_enum_by_nr(texture
));
295 if (texUnit
>= ctx
->Const
.MaxTextureImageUnits
) {
296 _mesa_error(ctx
, GL_INVALID_ENUM
, "glActiveTexture(texture)");
300 if (ctx
->Texture
.CurrentUnit
== texUnit
)
303 FLUSH_VERTICES(ctx
, _NEW_TEXTURE
);
305 ctx
->Texture
.CurrentUnit
= texUnit
;
306 if (ctx
->Transform
.MatrixMode
== GL_TEXTURE
) {
307 /* update current stack pointer */
308 ctx
->CurrentStack
= &ctx
->TextureMatrixStack
[texUnit
];
313 /* GL_ARB_multitexture */
315 _mesa_ClientActiveTextureARB(GLenum texture
)
317 GET_CURRENT_CONTEXT(ctx
);
318 GLuint texUnit
= texture
- GL_TEXTURE0
;
319 ASSERT_OUTSIDE_BEGIN_END(ctx
);
321 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
))
322 _mesa_debug(ctx
, "glClientActiveTexture %s\n",
323 _mesa_lookup_enum_by_nr(texture
));
325 if (texUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
326 _mesa_error(ctx
, GL_INVALID_ENUM
, "glClientActiveTexture(texture)");
330 if (ctx
->Array
.ActiveTexture
== texUnit
)
333 FLUSH_VERTICES(ctx
, _NEW_ARRAY
);
334 ctx
->Array
.ActiveTexture
= texUnit
;
339 /**********************************************************************/
340 /***** State management *****/
341 /**********************************************************************/
345 * \note This routine refers to derived texture attribute values to
346 * compute the ENABLE_TEXMAT flags, but is only called on
347 * _NEW_TEXTURE_MATRIX. On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
348 * flags are updated by _mesa_update_textures(), below.
350 * \param ctx GL context.
353 update_texture_matrices( GLcontext
*ctx
)
357 ctx
->Texture
._TexMatEnabled
= 0x0;
359 for (u
= 0; u
< ctx
->Const
.MaxTextureCoordUnits
; u
++) {
360 if (_math_matrix_is_dirty(ctx
->TextureMatrixStack
[u
].Top
)) {
361 _math_matrix_analyse( ctx
->TextureMatrixStack
[u
].Top
);
363 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
&&
364 ctx
->TextureMatrixStack
[u
].Top
->type
!= MATRIX_IDENTITY
)
365 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(u
);
372 * Examine texture unit's combine/env state to update derived state.
375 update_tex_combine(GLcontext
*ctx
, struct gl_texture_unit
*texUnit
)
377 struct gl_tex_env_combine_state
*combine
;
379 /* Set the texUnit->_CurrentCombine field to point to the user's combiner
380 * state, or the combiner state which is derived from traditional texenv
383 if (texUnit
->EnvMode
== GL_COMBINE
||
384 texUnit
->EnvMode
== GL_COMBINE4_NV
) {
385 texUnit
->_CurrentCombine
= & texUnit
->Combine
;
388 const struct gl_texture_object
*texObj
= texUnit
->_Current
;
389 GLenum format
= texObj
->Image
[0][texObj
->BaseLevel
]->_BaseFormat
;
390 if (format
== GL_COLOR_INDEX
) {
391 format
= GL_RGBA
; /* a bit of a hack */
393 else if (format
== GL_DEPTH_COMPONENT
||
394 format
== GL_DEPTH_STENCIL_EXT
) {
395 format
= texObj
->DepthMode
;
397 calculate_derived_texenv(&texUnit
->_EnvMode
, texUnit
->EnvMode
, format
);
398 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
401 combine
= texUnit
->_CurrentCombine
;
403 /* Determine number of source RGB terms in the combiner function */
404 switch (combine
->ModeRGB
) {
406 combine
->_NumArgsRGB
= 1;
410 if (texUnit
->EnvMode
== GL_COMBINE4_NV
)
411 combine
->_NumArgsRGB
= 4;
413 combine
->_NumArgsRGB
= 2;
419 case GL_DOT3_RGB_EXT
:
420 case GL_DOT3_RGBA_EXT
:
421 combine
->_NumArgsRGB
= 2;
424 case GL_MODULATE_ADD_ATI
:
425 case GL_MODULATE_SIGNED_ADD_ATI
:
426 case GL_MODULATE_SUBTRACT_ATI
:
427 combine
->_NumArgsRGB
= 3;
429 case GL_BUMP_ENVMAP_ATI
:
430 /* no real arguments for this case */
431 combine
->_NumArgsRGB
= 0;
434 combine
->_NumArgsRGB
= 0;
435 _mesa_problem(ctx
, "invalid RGB combine mode in update_texture_state");
439 /* Determine number of source Alpha terms in the combiner function */
440 switch (combine
->ModeA
) {
442 combine
->_NumArgsA
= 1;
446 if (texUnit
->EnvMode
== GL_COMBINE4_NV
)
447 combine
->_NumArgsA
= 4;
449 combine
->_NumArgsA
= 2;
453 combine
->_NumArgsA
= 2;
456 case GL_MODULATE_ADD_ATI
:
457 case GL_MODULATE_SIGNED_ADD_ATI
:
458 case GL_MODULATE_SUBTRACT_ATI
:
459 combine
->_NumArgsA
= 3;
462 combine
->_NumArgsA
= 0;
463 _mesa_problem(ctx
, "invalid Alpha combine mode in update_texture_state");
470 * \note This routine refers to derived texture matrix values to
471 * compute the ENABLE_TEXMAT flags, but is only called on
472 * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
473 * flags are updated by _mesa_update_texture_matrices, above.
475 * \param ctx GL context.
478 update_texture_state( GLcontext
*ctx
)
481 struct gl_fragment_program
*fprog
= NULL
;
482 struct gl_vertex_program
*vprog
= NULL
;
483 GLbitfield enabledFragUnits
= 0x0;
485 if (ctx
->Shader
.CurrentProgram
&&
486 ctx
->Shader
.CurrentProgram
->LinkStatus
) {
487 fprog
= ctx
->Shader
.CurrentProgram
->FragmentProgram
;
488 vprog
= ctx
->Shader
.CurrentProgram
->VertexProgram
;
491 if (ctx
->FragmentProgram
._Enabled
) {
492 fprog
= ctx
->FragmentProgram
.Current
;
494 if (ctx
->VertexProgram
._Enabled
) {
495 /* XXX enable this if/when non-shader vertex programs get
497 vprog = ctx->VertexProgram.Current;
502 /* TODO: only set this if there are actual changes */
503 ctx
->NewState
|= _NEW_TEXTURE
;
505 ctx
->Texture
._EnabledUnits
= 0x0;
506 ctx
->Texture
._GenFlags
= 0x0;
507 ctx
->Texture
._TexMatEnabled
= 0x0;
508 ctx
->Texture
._TexGenEnabled
= 0x0;
511 * Update texture unit state.
513 for (unit
= 0; unit
< ctx
->Const
.MaxTextureImageUnits
; unit
++) {
514 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
515 GLbitfield enabledVertTargets
= 0x0;
516 GLbitfield enabledFragTargets
= 0x0;
517 GLbitfield enabledTargets
= 0x0;
520 /* Get the bitmask of texture target enables.
521 * enableBits will be a mask of the TEXTURE_*_BIT flags indicating
522 * which texture targets are enabled (fixed function) or referenced
523 * by a fragment shader/program. When multiple flags are set, we'll
524 * settle on the one with highest priority (see below).
527 enabledVertTargets
|= vprog
->Base
.TexturesUsed
[unit
];
531 enabledFragTargets
|= fprog
->Base
.TexturesUsed
[unit
];
534 /* fixed-function fragment program */
535 enabledFragTargets
|= texUnit
->Enabled
;
538 enabledTargets
= enabledVertTargets
| enabledFragTargets
;
540 texUnit
->_ReallyEnabled
= 0x0;
542 if (enabledTargets
== 0x0) {
543 /* neither vertex nor fragment processing uses this unit */
547 /* Look for the highest priority texture target that's enabled (or used
548 * by the vert/frag shaders) and "complete". That's the one we'll use
549 * for texturing. If we're using vert/frag program we're guaranteed
550 * that bitcount(enabledBits) <= 1.
551 * Note that the TEXTURE_x_INDEX values are in high to low priority.
553 for (texIndex
= 0; texIndex
< NUM_TEXTURE_TARGETS
; texIndex
++) {
554 if (enabledTargets
& (1 << texIndex
)) {
555 struct gl_texture_object
*texObj
= texUnit
->CurrentTex
[texIndex
];
556 if (!texObj
->_Complete
) {
557 _mesa_test_texobj_completeness(ctx
, texObj
);
559 if (texObj
->_Complete
) {
560 texUnit
->_ReallyEnabled
= 1 << texIndex
;
561 _mesa_reference_texobj(&texUnit
->_Current
, texObj
);
567 if (!texUnit
->_ReallyEnabled
) {
569 /* If we get here it means the shader is expecting a texture
570 * object, but there isn't one (or it's incomplete). Use the
573 struct gl_texture_object
*texObj
= _mesa_get_fallback_texture(ctx
);
574 texUnit
->_ReallyEnabled
= 1 << TEXTURE_2D_INDEX
;
575 _mesa_reference_texobj(&texUnit
->_Current
, texObj
);
578 /* fixed-function: texture unit is really disabled */
583 /* if we get here, we know this texture unit is enabled */
585 ctx
->Texture
._EnabledUnits
|= (1 << unit
);
587 if (enabledFragTargets
)
588 enabledFragUnits
|= (1 << unit
);
590 update_tex_combine(ctx
, texUnit
);
594 /* Determine which texture coordinate sets are actually needed */
596 const GLuint coordMask
= (1 << MAX_TEXTURE_COORD_UNITS
) - 1;
597 ctx
->Texture
._EnabledCoordUnits
598 = (fprog
->Base
.InputsRead
>> FRAG_ATTRIB_TEX0
) & coordMask
;
601 ctx
->Texture
._EnabledCoordUnits
= enabledFragUnits
;
604 /* Setup texgen for those texture coordinate sets that are in use */
605 for (unit
= 0; unit
< ctx
->Const
.MaxTextureCoordUnits
; unit
++) {
606 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
608 texUnit
->_GenFlags
= 0x0;
610 if (!(ctx
->Texture
._EnabledCoordUnits
& (1 << unit
)))
613 if (texUnit
->TexGenEnabled
) {
614 if (texUnit
->TexGenEnabled
& S_BIT
) {
615 texUnit
->_GenFlags
|= texUnit
->GenS
._ModeBit
;
617 if (texUnit
->TexGenEnabled
& T_BIT
) {
618 texUnit
->_GenFlags
|= texUnit
->GenT
._ModeBit
;
620 if (texUnit
->TexGenEnabled
& R_BIT
) {
621 texUnit
->_GenFlags
|= texUnit
->GenR
._ModeBit
;
623 if (texUnit
->TexGenEnabled
& Q_BIT
) {
624 texUnit
->_GenFlags
|= texUnit
->GenQ
._ModeBit
;
627 ctx
->Texture
._TexGenEnabled
|= ENABLE_TEXGEN(unit
);
628 ctx
->Texture
._GenFlags
|= texUnit
->_GenFlags
;
631 if (ctx
->TextureMatrixStack
[unit
].Top
->type
!= MATRIX_IDENTITY
)
632 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(unit
);
638 * Update texture-related derived state.
641 _mesa_update_texture( GLcontext
*ctx
, GLuint new_state
)
643 if (new_state
& _NEW_TEXTURE_MATRIX
)
644 update_texture_matrices( ctx
);
646 if (new_state
& (_NEW_TEXTURE
| _NEW_PROGRAM
))
647 update_texture_state( ctx
);
651 /**********************************************************************/
652 /***** Initialization *****/
653 /**********************************************************************/
656 * Allocate the proxy textures for the given context.
658 * \param ctx the context to allocate proxies for.
660 * \return GL_TRUE on success, or GL_FALSE on failure
662 * If run out of memory part way through the allocations, clean up and return
666 alloc_proxy_textures( GLcontext
*ctx
)
668 static const GLenum targets
[] = {
672 GL_TEXTURE_CUBE_MAP_ARB
,
673 GL_TEXTURE_RECTANGLE_NV
,
674 GL_TEXTURE_1D_ARRAY_EXT
,
675 GL_TEXTURE_2D_ARRAY_EXT
679 ASSERT(Elements(targets
) == NUM_TEXTURE_TARGETS
);
681 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++) {
682 if (!(ctx
->Texture
.ProxyTex
[tgt
]
683 = ctx
->Driver
.NewTextureObject(ctx
, 0, targets
[tgt
]))) {
684 /* out of memory, free what we did allocate */
686 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
692 assert(ctx
->Texture
.ProxyTex
[0]->RefCount
== 1); /* sanity check */
698 * Initialize a texture unit.
700 * \param ctx GL context.
701 * \param unit texture unit number to be initialized.
704 init_texture_unit( GLcontext
*ctx
, GLuint unit
)
706 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
709 texUnit
->EnvMode
= GL_MODULATE
;
710 ASSIGN_4V( texUnit
->EnvColor
, 0.0, 0.0, 0.0, 0.0 );
712 texUnit
->Combine
= default_combine_state
;
713 texUnit
->_EnvMode
= default_combine_state
;
714 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
715 texUnit
->BumpTarget
= GL_TEXTURE0
;
717 texUnit
->TexGenEnabled
= 0x0;
718 texUnit
->GenS
.Mode
= GL_EYE_LINEAR
;
719 texUnit
->GenT
.Mode
= GL_EYE_LINEAR
;
720 texUnit
->GenR
.Mode
= GL_EYE_LINEAR
;
721 texUnit
->GenQ
.Mode
= GL_EYE_LINEAR
;
722 texUnit
->GenS
._ModeBit
= TEXGEN_EYE_LINEAR
;
723 texUnit
->GenT
._ModeBit
= TEXGEN_EYE_LINEAR
;
724 texUnit
->GenR
._ModeBit
= TEXGEN_EYE_LINEAR
;
725 texUnit
->GenQ
._ModeBit
= TEXGEN_EYE_LINEAR
;
727 /* Yes, these plane coefficients are correct! */
728 ASSIGN_4V( texUnit
->GenS
.ObjectPlane
, 1.0, 0.0, 0.0, 0.0 );
729 ASSIGN_4V( texUnit
->GenT
.ObjectPlane
, 0.0, 1.0, 0.0, 0.0 );
730 ASSIGN_4V( texUnit
->GenR
.ObjectPlane
, 0.0, 0.0, 0.0, 0.0 );
731 ASSIGN_4V( texUnit
->GenQ
.ObjectPlane
, 0.0, 0.0, 0.0, 0.0 );
732 ASSIGN_4V( texUnit
->GenS
.EyePlane
, 1.0, 0.0, 0.0, 0.0 );
733 ASSIGN_4V( texUnit
->GenT
.EyePlane
, 0.0, 1.0, 0.0, 0.0 );
734 ASSIGN_4V( texUnit
->GenR
.EyePlane
, 0.0, 0.0, 0.0, 0.0 );
735 ASSIGN_4V( texUnit
->GenQ
.EyePlane
, 0.0, 0.0, 0.0, 0.0 );
737 /* no mention of this in spec, but maybe id matrix expected? */
738 ASSIGN_4V( texUnit
->RotMatrix
, 1.0, 0.0, 0.0, 1.0 );
740 /* initialize current texture object ptrs to the shared default objects */
741 for (tex
= 0; tex
< NUM_TEXTURE_TARGETS
; tex
++) {
742 _mesa_reference_texobj(&texUnit
->CurrentTex
[tex
],
743 ctx
->Shared
->DefaultTex
[tex
]);
749 * Initialize texture state for the given context.
752 _mesa_init_texture(GLcontext
*ctx
)
757 ctx
->Texture
.CurrentUnit
= 0; /* multitexture */
758 ctx
->Texture
._EnabledUnits
= 0x0;
759 ctx
->Texture
.SharedPalette
= GL_FALSE
;
760 _mesa_init_colortable(&ctx
->Texture
.Palette
);
762 for (u
= 0; u
< MAX_TEXTURE_UNITS
; u
++)
763 init_texture_unit(ctx
, u
);
765 /* After we're done initializing the context's texture state the default
766 * texture objects' refcounts should be at least MAX_TEXTURE_UNITS + 1.
768 assert(ctx
->Shared
->DefaultTex
[TEXTURE_1D_INDEX
]->RefCount
769 >= MAX_TEXTURE_UNITS
+ 1);
771 /* Allocate proxy textures */
772 if (!alloc_proxy_textures( ctx
))
780 * Free dynamically-allocted texture data attached to the given context.
783 _mesa_free_texture_data(GLcontext
*ctx
)
787 /* unreference current textures */
788 for (u
= 0; u
< MAX_TEXTURE_IMAGE_UNITS
; u
++) {
789 /* The _Current texture could account for another reference */
790 _mesa_reference_texobj(&ctx
->Texture
.Unit
[u
]._Current
, NULL
);
792 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++) {
793 _mesa_reference_texobj(&ctx
->Texture
.Unit
[u
].CurrentTex
[tgt
], NULL
);
797 /* Free proxy texture objects */
798 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++)
799 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
801 for (u
= 0; u
< MAX_TEXTURE_IMAGE_UNITS
; u
++)
802 _mesa_free_colortable_data(&ctx
->Texture
.Unit
[u
].ColorTable
);
807 * Update the default texture objects in the given context to reference those
808 * specified in the shared state and release those referencing the old
812 _mesa_update_default_objects_texture(GLcontext
*ctx
)
816 for (u
= 0; u
< MAX_TEXTURE_UNITS
; u
++) {
817 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[u
];
818 for (tex
= 0; tex
< NUM_TEXTURE_TARGETS
; tex
++) {
819 _mesa_reference_texobj(&texUnit
->CurrentTex
[tex
],
820 ctx
->Shared
->DefaultTex
[tex
]);