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 (texUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
322 _mesa_error(ctx
, GL_INVALID_ENUM
, "glClientActiveTexture(texture)");
326 FLUSH_VERTICES(ctx
, _NEW_ARRAY
);
327 ctx
->Array
.ActiveTexture
= texUnit
;
332 /**********************************************************************/
333 /***** State management *****/
334 /**********************************************************************/
338 * \note This routine refers to derived texture attribute values to
339 * compute the ENABLE_TEXMAT flags, but is only called on
340 * _NEW_TEXTURE_MATRIX. On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
341 * flags are updated by _mesa_update_textures(), below.
343 * \param ctx GL context.
346 update_texture_matrices( GLcontext
*ctx
)
350 ctx
->Texture
._TexMatEnabled
= 0x0;
352 for (u
= 0; u
< ctx
->Const
.MaxTextureCoordUnits
; u
++) {
353 if (_math_matrix_is_dirty(ctx
->TextureMatrixStack
[u
].Top
)) {
354 _math_matrix_analyse( ctx
->TextureMatrixStack
[u
].Top
);
356 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
&&
357 ctx
->TextureMatrixStack
[u
].Top
->type
!= MATRIX_IDENTITY
)
358 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(u
);
365 * Examine texture unit's combine/env state to update derived state.
368 update_tex_combine(GLcontext
*ctx
, struct gl_texture_unit
*texUnit
)
370 struct gl_tex_env_combine_state
*combine
;
372 /* Set the texUnit->_CurrentCombine field to point to the user's combiner
373 * state, or the combiner state which is derived from traditional texenv
376 if (texUnit
->EnvMode
== GL_COMBINE
||
377 texUnit
->EnvMode
== GL_COMBINE4_NV
) {
378 texUnit
->_CurrentCombine
= & texUnit
->Combine
;
381 const struct gl_texture_object
*texObj
= texUnit
->_Current
;
382 GLenum format
= texObj
->Image
[0][texObj
->BaseLevel
]->_BaseFormat
;
383 if (format
== GL_COLOR_INDEX
) {
384 format
= GL_RGBA
; /* a bit of a hack */
386 else if (format
== GL_DEPTH_COMPONENT
||
387 format
== GL_DEPTH_STENCIL_EXT
) {
388 format
= texObj
->DepthMode
;
390 calculate_derived_texenv(&texUnit
->_EnvMode
, texUnit
->EnvMode
, format
);
391 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
394 combine
= texUnit
->_CurrentCombine
;
396 /* Determine number of source RGB terms in the combiner function */
397 switch (combine
->ModeRGB
) {
399 combine
->_NumArgsRGB
= 1;
403 if (texUnit
->EnvMode
== GL_COMBINE4_NV
)
404 combine
->_NumArgsRGB
= 4;
406 combine
->_NumArgsRGB
= 2;
412 case GL_DOT3_RGB_EXT
:
413 case GL_DOT3_RGBA_EXT
:
414 combine
->_NumArgsRGB
= 2;
417 case GL_MODULATE_ADD_ATI
:
418 case GL_MODULATE_SIGNED_ADD_ATI
:
419 case GL_MODULATE_SUBTRACT_ATI
:
420 combine
->_NumArgsRGB
= 3;
422 case GL_BUMP_ENVMAP_ATI
:
423 /* no real arguments for this case */
424 combine
->_NumArgsRGB
= 0;
427 combine
->_NumArgsRGB
= 0;
428 _mesa_problem(ctx
, "invalid RGB combine mode in update_texture_state");
432 /* Determine number of source Alpha terms in the combiner function */
433 switch (combine
->ModeA
) {
435 combine
->_NumArgsA
= 1;
439 if (texUnit
->EnvMode
== GL_COMBINE4_NV
)
440 combine
->_NumArgsA
= 4;
442 combine
->_NumArgsA
= 2;
446 combine
->_NumArgsA
= 2;
449 case GL_MODULATE_ADD_ATI
:
450 case GL_MODULATE_SIGNED_ADD_ATI
:
451 case GL_MODULATE_SUBTRACT_ATI
:
452 combine
->_NumArgsA
= 3;
455 combine
->_NumArgsA
= 0;
456 _mesa_problem(ctx
, "invalid Alpha combine mode in update_texture_state");
463 * \note This routine refers to derived texture matrix values to
464 * compute the ENABLE_TEXMAT flags, but is only called on
465 * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
466 * flags are updated by _mesa_update_texture_matrices, above.
468 * \param ctx GL context.
471 update_texture_state( GLcontext
*ctx
)
474 struct gl_fragment_program
*fprog
= NULL
;
475 struct gl_vertex_program
*vprog
= NULL
;
476 GLbitfield enabledFragUnits
= 0x0;
478 if (ctx
->Shader
.CurrentProgram
&&
479 ctx
->Shader
.CurrentProgram
->LinkStatus
) {
480 fprog
= ctx
->Shader
.CurrentProgram
->FragmentProgram
;
481 vprog
= ctx
->Shader
.CurrentProgram
->VertexProgram
;
484 if (ctx
->FragmentProgram
._Enabled
) {
485 fprog
= ctx
->FragmentProgram
.Current
;
487 if (ctx
->VertexProgram
._Enabled
) {
488 /* XXX enable this if/when non-shader vertex programs get
490 vprog = ctx->VertexProgram.Current;
495 /* TODO: only set this if there are actual changes */
496 ctx
->NewState
|= _NEW_TEXTURE
;
498 ctx
->Texture
._EnabledUnits
= 0x0;
499 ctx
->Texture
._GenFlags
= 0x0;
500 ctx
->Texture
._TexMatEnabled
= 0x0;
501 ctx
->Texture
._TexGenEnabled
= 0x0;
504 * Update texture unit state.
506 for (unit
= 0; unit
< ctx
->Const
.MaxTextureImageUnits
; unit
++) {
507 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
508 GLbitfield enabledVertTargets
= 0x0;
509 GLbitfield enabledFragTargets
= 0x0;
510 GLbitfield enabledTargets
= 0x0;
513 /* Get the bitmask of texture target enables.
514 * enableBits will be a mask of the TEXTURE_*_BIT flags indicating
515 * which texture targets are enabled (fixed function) or referenced
516 * by a fragment shader/program. When multiple flags are set, we'll
517 * settle on the one with highest priority (see below).
520 enabledVertTargets
|= vprog
->Base
.TexturesUsed
[unit
];
524 enabledFragTargets
|= fprog
->Base
.TexturesUsed
[unit
];
527 /* fixed-function fragment program */
528 enabledFragTargets
|= texUnit
->Enabled
;
531 enabledTargets
= enabledVertTargets
| enabledFragTargets
;
533 texUnit
->_ReallyEnabled
= 0x0;
535 if (enabledTargets
== 0x0) {
536 /* neither vertex nor fragment processing uses this unit */
540 /* Look for the highest priority texture target that's enabled (or used
541 * by the vert/frag shaders) and "complete". That's the one we'll use
542 * for texturing. If we're using vert/frag program we're guaranteed
543 * that bitcount(enabledBits) <= 1.
544 * Note that the TEXTURE_x_INDEX values are in high to low priority.
546 for (texIndex
= 0; texIndex
< NUM_TEXTURE_TARGETS
; texIndex
++) {
547 if (enabledTargets
& (1 << texIndex
)) {
548 struct gl_texture_object
*texObj
= texUnit
->CurrentTex
[texIndex
];
549 if (!texObj
->_Complete
) {
550 _mesa_test_texobj_completeness(ctx
, texObj
);
552 if (texObj
->_Complete
) {
553 texUnit
->_ReallyEnabled
= 1 << texIndex
;
554 _mesa_reference_texobj(&texUnit
->_Current
, texObj
);
560 if (!texUnit
->_ReallyEnabled
) {
562 /* If we get here it means the shader is expecting a texture
563 * object, but there isn't one (or it's incomplete). Use the
566 struct gl_texture_object
*texObj
= _mesa_get_fallback_texture(ctx
);
567 texUnit
->_ReallyEnabled
= 1 << TEXTURE_2D_INDEX
;
568 _mesa_reference_texobj(&texUnit
->_Current
, texObj
);
571 /* fixed-function: texture unit is really disabled */
576 /* if we get here, we know this texture unit is enabled */
578 ctx
->Texture
._EnabledUnits
|= (1 << unit
);
580 if (enabledFragTargets
)
581 enabledFragUnits
|= (1 << unit
);
583 update_tex_combine(ctx
, texUnit
);
587 /* Determine which texture coordinate sets are actually needed */
589 const GLuint coordMask
= (1 << MAX_TEXTURE_COORD_UNITS
) - 1;
590 ctx
->Texture
._EnabledCoordUnits
591 = (fprog
->Base
.InputsRead
>> FRAG_ATTRIB_TEX0
) & coordMask
;
594 ctx
->Texture
._EnabledCoordUnits
= enabledFragUnits
;
597 /* Setup texgen for those texture coordinate sets that are in use */
598 for (unit
= 0; unit
< ctx
->Const
.MaxTextureCoordUnits
; unit
++) {
599 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
601 texUnit
->_GenFlags
= 0x0;
603 if (!(ctx
->Texture
._EnabledCoordUnits
& (1 << unit
)))
606 if (texUnit
->TexGenEnabled
) {
607 if (texUnit
->TexGenEnabled
& S_BIT
) {
608 texUnit
->_GenFlags
|= texUnit
->GenS
._ModeBit
;
610 if (texUnit
->TexGenEnabled
& T_BIT
) {
611 texUnit
->_GenFlags
|= texUnit
->GenT
._ModeBit
;
613 if (texUnit
->TexGenEnabled
& R_BIT
) {
614 texUnit
->_GenFlags
|= texUnit
->GenR
._ModeBit
;
616 if (texUnit
->TexGenEnabled
& Q_BIT
) {
617 texUnit
->_GenFlags
|= texUnit
->GenQ
._ModeBit
;
620 ctx
->Texture
._TexGenEnabled
|= ENABLE_TEXGEN(unit
);
621 ctx
->Texture
._GenFlags
|= texUnit
->_GenFlags
;
624 if (ctx
->TextureMatrixStack
[unit
].Top
->type
!= MATRIX_IDENTITY
)
625 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(unit
);
631 * Update texture-related derived state.
634 _mesa_update_texture( GLcontext
*ctx
, GLuint new_state
)
636 if (new_state
& _NEW_TEXTURE_MATRIX
)
637 update_texture_matrices( ctx
);
639 if (new_state
& (_NEW_TEXTURE
| _NEW_PROGRAM
))
640 update_texture_state( ctx
);
644 /**********************************************************************/
645 /***** Initialization *****/
646 /**********************************************************************/
649 * Allocate the proxy textures for the given context.
651 * \param ctx the context to allocate proxies for.
653 * \return GL_TRUE on success, or GL_FALSE on failure
655 * If run out of memory part way through the allocations, clean up and return
659 alloc_proxy_textures( GLcontext
*ctx
)
661 static const GLenum targets
[] = {
665 GL_TEXTURE_CUBE_MAP_ARB
,
666 GL_TEXTURE_RECTANGLE_NV
,
667 GL_TEXTURE_1D_ARRAY_EXT
,
668 GL_TEXTURE_2D_ARRAY_EXT
672 ASSERT(Elements(targets
) == NUM_TEXTURE_TARGETS
);
674 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++) {
675 if (!(ctx
->Texture
.ProxyTex
[tgt
]
676 = ctx
->Driver
.NewTextureObject(ctx
, 0, targets
[tgt
]))) {
677 /* out of memory, free what we did allocate */
679 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
685 assert(ctx
->Texture
.ProxyTex
[0]->RefCount
== 1); /* sanity check */
691 * Initialize a texture unit.
693 * \param ctx GL context.
694 * \param unit texture unit number to be initialized.
697 init_texture_unit( GLcontext
*ctx
, GLuint unit
)
699 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
702 texUnit
->EnvMode
= GL_MODULATE
;
703 ASSIGN_4V( texUnit
->EnvColor
, 0.0, 0.0, 0.0, 0.0 );
705 texUnit
->Combine
= default_combine_state
;
706 texUnit
->_EnvMode
= default_combine_state
;
707 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
708 texUnit
->BumpTarget
= GL_TEXTURE0
;
710 texUnit
->TexGenEnabled
= 0x0;
711 texUnit
->GenS
.Mode
= GL_EYE_LINEAR
;
712 texUnit
->GenT
.Mode
= GL_EYE_LINEAR
;
713 texUnit
->GenR
.Mode
= GL_EYE_LINEAR
;
714 texUnit
->GenQ
.Mode
= GL_EYE_LINEAR
;
715 texUnit
->GenS
._ModeBit
= TEXGEN_EYE_LINEAR
;
716 texUnit
->GenT
._ModeBit
= TEXGEN_EYE_LINEAR
;
717 texUnit
->GenR
._ModeBit
= TEXGEN_EYE_LINEAR
;
718 texUnit
->GenQ
._ModeBit
= TEXGEN_EYE_LINEAR
;
720 /* Yes, these plane coefficients are correct! */
721 ASSIGN_4V( texUnit
->GenS
.ObjectPlane
, 1.0, 0.0, 0.0, 0.0 );
722 ASSIGN_4V( texUnit
->GenT
.ObjectPlane
, 0.0, 1.0, 0.0, 0.0 );
723 ASSIGN_4V( texUnit
->GenR
.ObjectPlane
, 0.0, 0.0, 0.0, 0.0 );
724 ASSIGN_4V( texUnit
->GenQ
.ObjectPlane
, 0.0, 0.0, 0.0, 0.0 );
725 ASSIGN_4V( texUnit
->GenS
.EyePlane
, 1.0, 0.0, 0.0, 0.0 );
726 ASSIGN_4V( texUnit
->GenT
.EyePlane
, 0.0, 1.0, 0.0, 0.0 );
727 ASSIGN_4V( texUnit
->GenR
.EyePlane
, 0.0, 0.0, 0.0, 0.0 );
728 ASSIGN_4V( texUnit
->GenQ
.EyePlane
, 0.0, 0.0, 0.0, 0.0 );
730 /* no mention of this in spec, but maybe id matrix expected? */
731 ASSIGN_4V( texUnit
->RotMatrix
, 1.0, 0.0, 0.0, 1.0 );
733 /* initialize current texture object ptrs to the shared default objects */
734 for (tex
= 0; tex
< NUM_TEXTURE_TARGETS
; tex
++) {
735 _mesa_reference_texobj(&texUnit
->CurrentTex
[tex
],
736 ctx
->Shared
->DefaultTex
[tex
]);
742 * Initialize texture state for the given context.
745 _mesa_init_texture(GLcontext
*ctx
)
750 ctx
->Texture
.CurrentUnit
= 0; /* multitexture */
751 ctx
->Texture
._EnabledUnits
= 0x0;
752 ctx
->Texture
.SharedPalette
= GL_FALSE
;
753 _mesa_init_colortable(&ctx
->Texture
.Palette
);
755 for (u
= 0; u
< MAX_TEXTURE_UNITS
; u
++)
756 init_texture_unit(ctx
, u
);
758 /* After we're done initializing the context's texture state the default
759 * texture objects' refcounts should be at least MAX_TEXTURE_UNITS + 1.
761 assert(ctx
->Shared
->DefaultTex
[TEXTURE_1D_INDEX
]->RefCount
762 >= MAX_TEXTURE_UNITS
+ 1);
764 /* Allocate proxy textures */
765 if (!alloc_proxy_textures( ctx
))
773 * Free dynamically-allocted texture data attached to the given context.
776 _mesa_free_texture_data(GLcontext
*ctx
)
780 /* unreference current textures */
781 for (u
= 0; u
< MAX_TEXTURE_IMAGE_UNITS
; u
++) {
782 /* The _Current texture could account for another reference */
783 _mesa_reference_texobj(&ctx
->Texture
.Unit
[u
]._Current
, NULL
);
785 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++) {
786 _mesa_reference_texobj(&ctx
->Texture
.Unit
[u
].CurrentTex
[tgt
], NULL
);
790 /* Free proxy texture objects */
791 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++)
792 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
794 for (u
= 0; u
< MAX_TEXTURE_IMAGE_UNITS
; u
++)
795 _mesa_free_colortable_data(&ctx
->Texture
.Unit
[u
].ColorTable
);
800 * Update the default texture objects in the given context to reference those
801 * specified in the shared state and release those referencing the old
805 _mesa_update_default_objects_texture(GLcontext
*ctx
)
809 for (u
= 0; u
< MAX_TEXTURE_UNITS
; u
++) {
810 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[u
];
811 for (tex
= 0; tex
< NUM_TEXTURE_TARGETS
; tex
++) {
812 _mesa_reference_texobj(&texUnit
->CurrentTex
[tex
],
813 ctx
->Shared
->DefaultTex
[tex
]);