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.
33 #if FEATURE_colortable
39 #include "texcompress.h"
43 #include "texenvprogram.h"
45 #include "math/m_xform.h"
50 * Default texture combine environment state. This is used to initialize
51 * a context's texture units and as the basis for converting "classic"
52 * texture environmnets to ARB_texture_env_combine style values.
54 static const struct gl_tex_env_combine_state default_combine_state
= {
55 GL_MODULATE
, GL_MODULATE
,
56 { GL_TEXTURE
, GL_PREVIOUS
, GL_CONSTANT
},
57 { GL_TEXTURE
, GL_PREVIOUS
, GL_CONSTANT
},
58 { GL_SRC_COLOR
, GL_SRC_COLOR
, GL_SRC_ALPHA
},
59 { GL_SRC_ALPHA
, GL_SRC_ALPHA
, GL_SRC_ALPHA
},
67 * Used by glXCopyContext to copy texture state from one context to another.
70 _mesa_copy_texture_state( const GLcontext
*src
, GLcontext
*dst
)
77 dst
->Texture
.CurrentUnit
= src
->Texture
.CurrentUnit
;
78 dst
->Texture
._GenFlags
= src
->Texture
._GenFlags
;
79 dst
->Texture
._TexGenEnabled
= src
->Texture
._TexGenEnabled
;
80 dst
->Texture
._TexMatEnabled
= src
->Texture
._TexMatEnabled
;
81 dst
->Texture
.SharedPalette
= src
->Texture
.SharedPalette
;
84 for (i
= 0; i
< src
->Const
.MaxTextureImageUnits
; i
++) {
85 dst
->Texture
.Unit
[i
].Enabled
= src
->Texture
.Unit
[i
].Enabled
;
86 dst
->Texture
.Unit
[i
].EnvMode
= src
->Texture
.Unit
[i
].EnvMode
;
87 COPY_4V(dst
->Texture
.Unit
[i
].EnvColor
, src
->Texture
.Unit
[i
].EnvColor
);
88 dst
->Texture
.Unit
[i
].TexGenEnabled
= src
->Texture
.Unit
[i
].TexGenEnabled
;
89 dst
->Texture
.Unit
[i
].GenModeS
= src
->Texture
.Unit
[i
].GenModeS
;
90 dst
->Texture
.Unit
[i
].GenModeT
= src
->Texture
.Unit
[i
].GenModeT
;
91 dst
->Texture
.Unit
[i
].GenModeR
= src
->Texture
.Unit
[i
].GenModeR
;
92 dst
->Texture
.Unit
[i
].GenModeQ
= src
->Texture
.Unit
[i
].GenModeQ
;
93 dst
->Texture
.Unit
[i
]._GenBitS
= src
->Texture
.Unit
[i
]._GenBitS
;
94 dst
->Texture
.Unit
[i
]._GenBitT
= src
->Texture
.Unit
[i
]._GenBitT
;
95 dst
->Texture
.Unit
[i
]._GenBitR
= src
->Texture
.Unit
[i
]._GenBitR
;
96 dst
->Texture
.Unit
[i
]._GenBitQ
= src
->Texture
.Unit
[i
]._GenBitQ
;
97 dst
->Texture
.Unit
[i
]._GenFlags
= src
->Texture
.Unit
[i
]._GenFlags
;
98 COPY_4V(dst
->Texture
.Unit
[i
].ObjectPlaneS
, src
->Texture
.Unit
[i
].ObjectPlaneS
);
99 COPY_4V(dst
->Texture
.Unit
[i
].ObjectPlaneT
, src
->Texture
.Unit
[i
].ObjectPlaneT
);
100 COPY_4V(dst
->Texture
.Unit
[i
].ObjectPlaneR
, src
->Texture
.Unit
[i
].ObjectPlaneR
);
101 COPY_4V(dst
->Texture
.Unit
[i
].ObjectPlaneQ
, src
->Texture
.Unit
[i
].ObjectPlaneQ
);
102 COPY_4V(dst
->Texture
.Unit
[i
].EyePlaneS
, src
->Texture
.Unit
[i
].EyePlaneS
);
103 COPY_4V(dst
->Texture
.Unit
[i
].EyePlaneT
, src
->Texture
.Unit
[i
].EyePlaneT
);
104 COPY_4V(dst
->Texture
.Unit
[i
].EyePlaneR
, src
->Texture
.Unit
[i
].EyePlaneR
);
105 COPY_4V(dst
->Texture
.Unit
[i
].EyePlaneQ
, src
->Texture
.Unit
[i
].EyePlaneQ
);
106 dst
->Texture
.Unit
[i
].LodBias
= src
->Texture
.Unit
[i
].LodBias
;
108 /* GL_EXT_texture_env_combine */
109 dst
->Texture
.Unit
[i
].Combine
.ModeRGB
= src
->Texture
.Unit
[i
].Combine
.ModeRGB
;
110 dst
->Texture
.Unit
[i
].Combine
.ModeA
= src
->Texture
.Unit
[i
].Combine
.ModeA
;
111 COPY_3V(dst
->Texture
.Unit
[i
].Combine
.SourceRGB
, src
->Texture
.Unit
[i
].Combine
.SourceRGB
);
112 COPY_3V(dst
->Texture
.Unit
[i
].Combine
.SourceA
, src
->Texture
.Unit
[i
].Combine
.SourceA
);
113 COPY_3V(dst
->Texture
.Unit
[i
].Combine
.OperandRGB
, src
->Texture
.Unit
[i
].Combine
.OperandRGB
);
114 COPY_3V(dst
->Texture
.Unit
[i
].Combine
.OperandA
, src
->Texture
.Unit
[i
].Combine
.OperandA
);
115 dst
->Texture
.Unit
[i
].Combine
.ScaleShiftRGB
= src
->Texture
.Unit
[i
].Combine
.ScaleShiftRGB
;
116 dst
->Texture
.Unit
[i
].Combine
.ScaleShiftA
= src
->Texture
.Unit
[i
].Combine
.ScaleShiftA
;
118 /* copy texture object bindings, not contents of texture objects */
119 _mesa_lock_context_textures(dst
);
121 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].Current1D
,
122 src
->Texture
.Unit
[i
].Current1D
);
123 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].Current2D
,
124 src
->Texture
.Unit
[i
].Current2D
);
125 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].Current3D
,
126 src
->Texture
.Unit
[i
].Current3D
);
127 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].CurrentCubeMap
,
128 src
->Texture
.Unit
[i
].CurrentCubeMap
);
129 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].CurrentRect
,
130 src
->Texture
.Unit
[i
].CurrentRect
);
131 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].Current1DArray
,
132 src
->Texture
.Unit
[i
].Current1DArray
);
133 _mesa_reference_texobj(&dst
->Texture
.Unit
[i
].Current2DArray
,
134 src
->Texture
.Unit
[i
].Current2DArray
);
136 _mesa_unlock_context_textures(dst
);
145 _mesa_print_texunit_state( GLcontext
*ctx
, GLuint unit
)
147 const struct gl_texture_unit
*texUnit
= ctx
->Texture
.Unit
+ unit
;
148 _mesa_printf("Texture Unit %d\n", unit
);
149 _mesa_printf(" GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit
->EnvMode
));
150 _mesa_printf(" GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.ModeRGB
));
151 _mesa_printf(" GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.ModeA
));
152 _mesa_printf(" GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[0]));
153 _mesa_printf(" GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[1]));
154 _mesa_printf(" GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceRGB
[2]));
155 _mesa_printf(" GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[0]));
156 _mesa_printf(" GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[1]));
157 _mesa_printf(" GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.SourceA
[2]));
158 _mesa_printf(" GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[0]));
159 _mesa_printf(" GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[1]));
160 _mesa_printf(" GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandRGB
[2]));
161 _mesa_printf(" GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[0]));
162 _mesa_printf(" GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[1]));
163 _mesa_printf(" GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit
->Combine
.OperandA
[2]));
164 _mesa_printf(" GL_RGB_SCALE = %d\n", 1 << texUnit
->Combine
.ScaleShiftRGB
);
165 _mesa_printf(" GL_ALPHA_SCALE = %d\n", 1 << texUnit
->Combine
.ScaleShiftA
);
166 _mesa_printf(" GL_TEXTURE_ENV_COLOR = (%f, %f, %f, %f)\n", texUnit
->EnvColor
[0], texUnit
->EnvColor
[1], texUnit
->EnvColor
[2], texUnit
->EnvColor
[3]);
171 /**********************************************************************/
172 /* Texture Environment */
173 /**********************************************************************/
176 * Convert "classic" texture environment to ARB_texture_env_combine style
179 * \param state texture_env_combine state vector to be filled-in.
180 * \param mode Classic texture environment mode (i.e., \c GL_REPLACE,
181 * \c GL_BLEND, \c GL_DECAL, etc.).
182 * \param texBaseFormat Base format of the texture associated with the
186 calculate_derived_texenv( struct gl_tex_env_combine_state
*state
,
187 GLenum mode
, GLenum texBaseFormat
)
192 *state
= default_combine_state
;
194 switch (texBaseFormat
) {
196 state
->SourceRGB
[0] = GL_PREVIOUS
;
199 case GL_LUMINANCE_ALPHA
:
207 state
->SourceA
[0] = GL_PREVIOUS
;
211 _mesa_problem(NULL
, "Invalid texBaseFormat in calculate_derived_texenv");
215 if (mode
== GL_REPLACE_EXT
)
221 mode_rgb
= (texBaseFormat
== GL_ALPHA
) ? GL_REPLACE
: mode
;
226 mode_rgb
= GL_INTERPOLATE
;
229 state
->SourceA
[0] = GL_PREVIOUS
;
231 /* Having alpha / luminance / intensity textures replace using the
232 * incoming fragment color matches the definition in NV_texture_shader.
233 * The 1.5 spec simply marks these as "undefined".
235 switch (texBaseFormat
) {
238 case GL_LUMINANCE_ALPHA
:
240 state
->SourceRGB
[0] = GL_PREVIOUS
;
244 mode_rgb
= GL_REPLACE
;
247 state
->SourceRGB
[2] = GL_TEXTURE
;
253 mode_rgb
= GL_INTERPOLATE
;
254 mode_a
= GL_MODULATE
;
256 switch (texBaseFormat
) {
258 mode_rgb
= GL_REPLACE
;
261 mode_a
= GL_INTERPOLATE
;
262 state
->SourceA
[0] = GL_CONSTANT
;
263 state
->OperandA
[2] = GL_SRC_ALPHA
;
267 case GL_LUMINANCE_ALPHA
:
270 state
->SourceRGB
[2] = GL_TEXTURE
;
271 state
->SourceA
[2] = GL_TEXTURE
;
272 state
->SourceRGB
[0] = GL_CONSTANT
;
273 state
->OperandRGB
[2] = GL_SRC_COLOR
;
279 mode_rgb
= (texBaseFormat
== GL_ALPHA
) ? GL_REPLACE
: GL_ADD
;
280 mode_a
= (texBaseFormat
== GL_INTENSITY
) ? GL_ADD
: GL_MODULATE
;
285 "Invalid texture env mode in calculate_derived_texenv");
289 state
->ModeRGB
= (state
->SourceRGB
[0] != GL_PREVIOUS
)
290 ? mode_rgb
: GL_REPLACE
;
291 state
->ModeA
= (state
->SourceA
[0] != GL_PREVIOUS
)
292 ? mode_a
: GL_REPLACE
;
298 /* GL_ARB_multitexture */
300 _mesa_ActiveTextureARB(GLenum texture
)
302 GET_CURRENT_CONTEXT(ctx
);
303 const GLuint texUnit
= texture
- GL_TEXTURE0
;
304 ASSERT_OUTSIDE_BEGIN_END(ctx
);
306 if (MESA_VERBOSE
& (VERBOSE_API
|VERBOSE_TEXTURE
))
307 _mesa_debug(ctx
, "glActiveTexture %s\n",
308 _mesa_lookup_enum_by_nr(texture
));
310 if (texUnit
>= ctx
->Const
.MaxTextureImageUnits
) {
311 _mesa_error(ctx
, GL_INVALID_ENUM
, "glActiveTexture(texture)");
315 if (ctx
->Texture
.CurrentUnit
== texUnit
)
318 FLUSH_VERTICES(ctx
, _NEW_TEXTURE
);
320 ctx
->Texture
.CurrentUnit
= texUnit
;
321 if (ctx
->Transform
.MatrixMode
== GL_TEXTURE
) {
322 /* update current stack pointer */
323 ctx
->CurrentStack
= &ctx
->TextureMatrixStack
[texUnit
];
326 if (ctx
->Driver
.ActiveTexture
) {
327 (*ctx
->Driver
.ActiveTexture
)( ctx
, (GLuint
) texUnit
);
332 /* GL_ARB_multitexture */
334 _mesa_ClientActiveTextureARB(GLenum texture
)
336 GET_CURRENT_CONTEXT(ctx
);
337 GLuint texUnit
= texture
- GL_TEXTURE0
;
338 ASSERT_OUTSIDE_BEGIN_END(ctx
);
340 if (texUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
341 _mesa_error(ctx
, GL_INVALID_ENUM
, "glClientActiveTexture(texture)");
345 FLUSH_VERTICES(ctx
, _NEW_ARRAY
);
346 ctx
->Array
.ActiveTexture
= texUnit
;
351 /**********************************************************************/
352 /***** State management *****/
353 /**********************************************************************/
357 * \note This routine refers to derived texture attribute values to
358 * compute the ENABLE_TEXMAT flags, but is only called on
359 * _NEW_TEXTURE_MATRIX. On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
360 * flags are updated by _mesa_update_textures(), below.
362 * \param ctx GL context.
365 update_texture_matrices( GLcontext
*ctx
)
369 ctx
->Texture
._TexMatEnabled
= 0;
371 for (i
=0; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++) {
372 if (_math_matrix_is_dirty(ctx
->TextureMatrixStack
[i
].Top
)) {
373 _math_matrix_analyse( ctx
->TextureMatrixStack
[i
].Top
);
375 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
&&
376 ctx
->TextureMatrixStack
[i
].Top
->type
!= MATRIX_IDENTITY
)
377 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(i
);
379 if (ctx
->Driver
.TextureMatrix
)
380 ctx
->Driver
.TextureMatrix( ctx
, i
, ctx
->TextureMatrixStack
[i
].Top
);
387 * Update texture object's _Function field. We need to do this
388 * whenever any of the texture object's shadow-related fields change
389 * or when we start/stop using a fragment program.
391 * This function could be expanded someday to update additional per-object
392 * fields that depend on assorted state changes.
395 update_texture_compare_function(GLcontext
*ctx
,
396 struct gl_texture_object
*tObj
)
398 /* XXX temporarily disable this test since it breaks the GLSL
399 * shadow2D(), etc. functions.
401 if (0 /*ctx->FragmentProgram._Current*/) {
402 /* Texel/coordinate comparison is ignored for programs.
403 * See GL_ARB_fragment_program/shader spec for details.
405 tObj
->_Function
= GL_NONE
;
407 else if (tObj
->CompareFlag
) {
409 if (tObj
->CompareOperator
== GL_TEXTURE_LEQUAL_R_SGIX
) {
410 tObj
->_Function
= GL_LEQUAL
;
413 ASSERT(tObj
->CompareOperator
== GL_TEXTURE_GEQUAL_R_SGIX
);
414 tObj
->_Function
= GL_GEQUAL
;
417 else if (tObj
->CompareMode
== GL_COMPARE_R_TO_TEXTURE_ARB
) {
419 tObj
->_Function
= tObj
->CompareFunc
;
422 tObj
->_Function
= GL_NONE
; /* pass depth through as grayscale */
428 * Helper function for determining which texture object (1D, 2D, cube, etc)
429 * should actually be used.
432 texture_override(GLcontext
*ctx
,
433 struct gl_texture_unit
*texUnit
, GLbitfield enableBits
,
434 struct gl_texture_object
*texObj
, GLuint textureBit
)
436 if (!texUnit
->_ReallyEnabled
&& (enableBits
& textureBit
)) {
437 if (!texObj
->_Complete
) {
438 _mesa_test_texobj_completeness(ctx
, texObj
);
440 if (texObj
->_Complete
) {
441 texUnit
->_ReallyEnabled
= textureBit
;
442 texUnit
->_Current
= texObj
;
443 update_texture_compare_function(ctx
, texObj
);
450 * \note This routine refers to derived texture matrix values to
451 * compute the ENABLE_TEXMAT flags, but is only called on
452 * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
453 * flags are updated by _mesa_update_texture_matrices, above.
455 * \param ctx GL context.
458 update_texture_state( GLcontext
*ctx
)
461 struct gl_fragment_program
*fprog
= NULL
;
462 struct gl_vertex_program
*vprog
= NULL
;
464 if (ctx
->Shader
.CurrentProgram
&&
465 ctx
->Shader
.CurrentProgram
->LinkStatus
) {
466 fprog
= ctx
->Shader
.CurrentProgram
->FragmentProgram
;
467 vprog
= ctx
->Shader
.CurrentProgram
->VertexProgram
;
470 if (ctx
->FragmentProgram
._Enabled
) {
471 fprog
= ctx
->FragmentProgram
.Current
;
473 if (ctx
->VertexProgram
._Enabled
) {
474 /* XXX enable this if/when non-shader vertex programs get
476 vprog = ctx->VertexProgram.Current;
481 ctx
->NewState
|= _NEW_TEXTURE
; /* TODO: only set this if there are
485 ctx
->Texture
._EnabledUnits
= 0;
486 ctx
->Texture
._GenFlags
= 0;
487 ctx
->Texture
._TexMatEnabled
= 0;
488 ctx
->Texture
._TexGenEnabled
= 0;
491 * Update texture unit state.
493 for (unit
= 0; unit
< ctx
->Const
.MaxTextureImageUnits
; unit
++) {
494 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
495 GLbitfield enableBits
;
497 texUnit
->_Current
= NULL
;
498 texUnit
->_ReallyEnabled
= 0;
499 texUnit
->_GenFlags
= 0;
501 /* Get the bitmask of texture enables.
502 * enableBits will be a mask of the TEXTURE_*_BIT flags indicating
503 * which texture targets are enabled (fixed function) or referenced
504 * by a fragment shader/program. When multiple flags are set, we'll
505 * settle on the one with highest priority (see texture_override below).
507 if (fprog
|| vprog
) {
510 enableBits
|= fprog
->Base
.TexturesUsed
[unit
];
512 enableBits
|= vprog
->Base
.TexturesUsed
[unit
];
515 if (!texUnit
->Enabled
)
517 enableBits
= texUnit
->Enabled
;
520 /* Look for the highest-priority texture target that's enabled and
521 * complete. That's the one we'll use for texturing. If we're using
522 * a fragment program we're guaranteed that bitcount(enabledBits) <= 1.
524 texture_override(ctx
, texUnit
, enableBits
,
525 texUnit
->Current2DArray
, TEXTURE_2D_ARRAY_BIT
);
526 texture_override(ctx
, texUnit
, enableBits
,
527 texUnit
->Current1DArray
, TEXTURE_1D_ARRAY_BIT
);
528 texture_override(ctx
, texUnit
, enableBits
,
529 texUnit
->CurrentCubeMap
, TEXTURE_CUBE_BIT
);
530 texture_override(ctx
, texUnit
, enableBits
,
531 texUnit
->Current3D
, TEXTURE_3D_BIT
);
532 texture_override(ctx
, texUnit
, enableBits
,
533 texUnit
->CurrentRect
, TEXTURE_RECT_BIT
);
534 texture_override(ctx
, texUnit
, enableBits
,
535 texUnit
->Current2D
, TEXTURE_2D_BIT
);
536 texture_override(ctx
, texUnit
, enableBits
,
537 texUnit
->Current1D
, TEXTURE_1D_BIT
);
539 if (!texUnit
->_ReallyEnabled
) {
543 if (texUnit
->_ReallyEnabled
)
544 ctx
->Texture
._EnabledUnits
|= (1 << unit
);
546 if (texUnit
->EnvMode
== GL_COMBINE
) {
547 texUnit
->_CurrentCombine
= & texUnit
->Combine
;
550 const struct gl_texture_object
*texObj
= texUnit
->_Current
;
551 GLenum format
= texObj
->Image
[0][texObj
->BaseLevel
]->_BaseFormat
;
552 if (format
== GL_COLOR_INDEX
) {
553 format
= GL_RGBA
; /* a bit of a hack */
555 else if (format
== GL_DEPTH_COMPONENT
556 || format
== GL_DEPTH_STENCIL_EXT
) {
557 format
= texObj
->DepthMode
;
559 calculate_derived_texenv(&texUnit
->_EnvMode
, texUnit
->EnvMode
, format
);
560 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
563 switch (texUnit
->_CurrentCombine
->ModeRGB
) {
565 texUnit
->_CurrentCombine
->_NumArgsRGB
= 1;
573 case GL_DOT3_RGB_EXT
:
574 case GL_DOT3_RGBA_EXT
:
575 texUnit
->_CurrentCombine
->_NumArgsRGB
= 2;
578 case GL_MODULATE_ADD_ATI
:
579 case GL_MODULATE_SIGNED_ADD_ATI
:
580 case GL_MODULATE_SUBTRACT_ATI
:
581 texUnit
->_CurrentCombine
->_NumArgsRGB
= 3;
584 texUnit
->_CurrentCombine
->_NumArgsRGB
= 0;
585 _mesa_problem(ctx
, "invalid RGB combine mode in update_texture_state");
589 switch (texUnit
->_CurrentCombine
->ModeA
) {
591 texUnit
->_CurrentCombine
->_NumArgsA
= 1;
597 texUnit
->_CurrentCombine
->_NumArgsA
= 2;
600 case GL_MODULATE_ADD_ATI
:
601 case GL_MODULATE_SIGNED_ADD_ATI
:
602 case GL_MODULATE_SUBTRACT_ATI
:
603 texUnit
->_CurrentCombine
->_NumArgsA
= 3;
606 texUnit
->_CurrentCombine
->_NumArgsA
= 0;
607 _mesa_problem(ctx
, "invalid Alpha combine mode in update_texture_state");
612 /* Determine which texture coordinate sets are actually needed */
614 const GLuint coordMask
= (1 << MAX_TEXTURE_COORD_UNITS
) - 1;
615 ctx
->Texture
._EnabledCoordUnits
616 = (fprog
->Base
.InputsRead
>> FRAG_ATTRIB_TEX0
) & coordMask
;
619 ctx
->Texture
._EnabledCoordUnits
= ctx
->Texture
._EnabledUnits
;
622 /* Setup texgen for those texture coordinate sets that are in use */
623 for (unit
= 0; unit
< ctx
->Const
.MaxTextureCoordUnits
; unit
++) {
624 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
626 if (!(ctx
->Texture
._EnabledCoordUnits
& (1 << unit
)))
629 if (texUnit
->TexGenEnabled
) {
630 if (texUnit
->TexGenEnabled
& S_BIT
) {
631 texUnit
->_GenFlags
|= texUnit
->_GenBitS
;
633 if (texUnit
->TexGenEnabled
& T_BIT
) {
634 texUnit
->_GenFlags
|= texUnit
->_GenBitT
;
636 if (texUnit
->TexGenEnabled
& Q_BIT
) {
637 texUnit
->_GenFlags
|= texUnit
->_GenBitQ
;
639 if (texUnit
->TexGenEnabled
& R_BIT
) {
640 texUnit
->_GenFlags
|= texUnit
->_GenBitR
;
643 ctx
->Texture
._TexGenEnabled
|= ENABLE_TEXGEN(unit
);
644 ctx
->Texture
._GenFlags
|= texUnit
->_GenFlags
;
647 if (ctx
->TextureMatrixStack
[unit
].Top
->type
!= MATRIX_IDENTITY
)
648 ctx
->Texture
._TexMatEnabled
|= ENABLE_TEXMAT(unit
);
654 * Update texture-related derived state.
657 _mesa_update_texture( GLcontext
*ctx
, GLuint new_state
)
659 if (new_state
& _NEW_TEXTURE_MATRIX
)
660 update_texture_matrices( ctx
);
662 if (new_state
& (_NEW_TEXTURE
| _NEW_PROGRAM
))
663 update_texture_state( ctx
);
667 /**********************************************************************/
668 /***** Initialization *****/
669 /**********************************************************************/
672 * Allocate the proxy textures for the given context.
674 * \param ctx the context to allocate proxies for.
676 * \return GL_TRUE on success, or GL_FALSE on failure
678 * If run out of memory part way through the allocations, clean up and return
682 alloc_proxy_textures( GLcontext
*ctx
)
684 static const GLenum targets
[] = {
688 GL_TEXTURE_CUBE_MAP_ARB
,
689 GL_TEXTURE_RECTANGLE_NV
,
690 GL_TEXTURE_1D_ARRAY_EXT
,
691 GL_TEXTURE_2D_ARRAY_EXT
695 ASSERT(Elements(targets
) == NUM_TEXTURE_TARGETS
);
697 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++) {
698 if (!(ctx
->Texture
.ProxyTex
[tgt
]
699 = ctx
->Driver
.NewTextureObject(ctx
, 0, targets
[tgt
]))) {
700 /* out of memory, free what we did allocate */
702 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
708 assert(ctx
->Texture
.ProxyTex
[0]->RefCount
== 1); /* sanity check */
714 * Initialize a texture unit.
716 * \param ctx GL context.
717 * \param unit texture unit number to be initialized.
720 init_texture_unit( GLcontext
*ctx
, GLuint unit
)
722 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
724 texUnit
->EnvMode
= GL_MODULATE
;
725 ASSIGN_4V( texUnit
->EnvColor
, 0.0, 0.0, 0.0, 0.0 );
727 texUnit
->Combine
= default_combine_state
;
728 texUnit
->_EnvMode
= default_combine_state
;
729 texUnit
->_CurrentCombine
= & texUnit
->_EnvMode
;
731 texUnit
->TexGenEnabled
= 0;
732 texUnit
->GenModeS
= GL_EYE_LINEAR
;
733 texUnit
->GenModeT
= GL_EYE_LINEAR
;
734 texUnit
->GenModeR
= GL_EYE_LINEAR
;
735 texUnit
->GenModeQ
= GL_EYE_LINEAR
;
736 texUnit
->_GenBitS
= TEXGEN_EYE_LINEAR
;
737 texUnit
->_GenBitT
= TEXGEN_EYE_LINEAR
;
738 texUnit
->_GenBitR
= TEXGEN_EYE_LINEAR
;
739 texUnit
->_GenBitQ
= TEXGEN_EYE_LINEAR
;
741 /* Yes, these plane coefficients are correct! */
742 ASSIGN_4V( texUnit
->ObjectPlaneS
, 1.0, 0.0, 0.0, 0.0 );
743 ASSIGN_4V( texUnit
->ObjectPlaneT
, 0.0, 1.0, 0.0, 0.0 );
744 ASSIGN_4V( texUnit
->ObjectPlaneR
, 0.0, 0.0, 0.0, 0.0 );
745 ASSIGN_4V( texUnit
->ObjectPlaneQ
, 0.0, 0.0, 0.0, 0.0 );
746 ASSIGN_4V( texUnit
->EyePlaneS
, 1.0, 0.0, 0.0, 0.0 );
747 ASSIGN_4V( texUnit
->EyePlaneT
, 0.0, 1.0, 0.0, 0.0 );
748 ASSIGN_4V( texUnit
->EyePlaneR
, 0.0, 0.0, 0.0, 0.0 );
749 ASSIGN_4V( texUnit
->EyePlaneQ
, 0.0, 0.0, 0.0, 0.0 );
751 /* initialize current texture object ptrs to the shared default objects */
752 _mesa_reference_texobj(&texUnit
->Current1D
, ctx
->Shared
->Default1D
);
753 _mesa_reference_texobj(&texUnit
->Current2D
, ctx
->Shared
->Default2D
);
754 _mesa_reference_texobj(&texUnit
->Current3D
, ctx
->Shared
->Default3D
);
755 _mesa_reference_texobj(&texUnit
->CurrentCubeMap
, ctx
->Shared
->DefaultCubeMap
);
756 _mesa_reference_texobj(&texUnit
->CurrentRect
, ctx
->Shared
->DefaultRect
);
757 _mesa_reference_texobj(&texUnit
->Current1DArray
, ctx
->Shared
->Default1DArray
);
758 _mesa_reference_texobj(&texUnit
->Current2DArray
, ctx
->Shared
->Default2DArray
);
763 * Initialize texture state for the given context.
766 _mesa_init_texture(GLcontext
*ctx
)
770 assert(MAX_TEXTURE_LEVELS
>= MAX_3D_TEXTURE_LEVELS
);
771 assert(MAX_TEXTURE_LEVELS
>= MAX_CUBE_TEXTURE_LEVELS
);
774 ctx
->Texture
.CurrentUnit
= 0; /* multitexture */
775 ctx
->Texture
._EnabledUnits
= 0;
776 ctx
->Texture
.SharedPalette
= GL_FALSE
;
777 #if FEATURE_colortable
778 _mesa_init_colortable(&ctx
->Texture
.Palette
);
781 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++)
782 init_texture_unit( ctx
, i
);
784 /* After we're done initializing the context's texture state the default
785 * texture objects' refcounts should be at least MAX_TEXTURE_UNITS + 1.
787 assert(ctx
->Shared
->Default1D
->RefCount
>= MAX_TEXTURE_UNITS
+ 1);
789 /* Allocate proxy textures */
790 if (!alloc_proxy_textures( ctx
))
798 * Free dynamically-allocted texture data attached to the given context.
801 _mesa_free_texture_data(GLcontext
*ctx
)
805 /* unreference current textures */
806 for (u
= 0; u
< MAX_TEXTURE_IMAGE_UNITS
; u
++) {
807 struct gl_texture_unit
*unit
= ctx
->Texture
.Unit
+ u
;
808 _mesa_reference_texobj(&unit
->Current1D
, NULL
);
809 _mesa_reference_texobj(&unit
->Current2D
, NULL
);
810 _mesa_reference_texobj(&unit
->Current3D
, NULL
);
811 _mesa_reference_texobj(&unit
->CurrentCubeMap
, NULL
);
812 _mesa_reference_texobj(&unit
->CurrentRect
, NULL
);
813 _mesa_reference_texobj(&unit
->Current1DArray
, NULL
);
814 _mesa_reference_texobj(&unit
->Current2DArray
, NULL
);
817 /* Free proxy texture objects */
818 for (tgt
= 0; tgt
< NUM_TEXTURE_TARGETS
; tgt
++)
819 ctx
->Driver
.DeleteTexture(ctx
, ctx
->Texture
.ProxyTex
[tgt
]);
821 #if FEATURE_colortable
824 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
825 _mesa_free_colortable_data( &ctx
->Texture
.Unit
[i
].ColorTable
);
832 * Update the default texture objects in the given context to reference those
833 * specified in the shared state and release those referencing the old
837 _mesa_update_default_objects_texture(GLcontext
*ctx
)
841 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
842 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
844 _mesa_reference_texobj(&texUnit
->Current1D
, ctx
->Shared
->Default1D
);
845 _mesa_reference_texobj(&texUnit
->Current2D
, ctx
->Shared
->Default2D
);
846 _mesa_reference_texobj(&texUnit
->Current3D
, ctx
->Shared
->Default3D
);
847 _mesa_reference_texobj(&texUnit
->CurrentCubeMap
, ctx
->Shared
->DefaultCubeMap
);
848 _mesa_reference_texobj(&texUnit
->CurrentRect
, ctx
->Shared
->DefaultRect
);
849 _mesa_reference_texobj(&texUnit
->Current1DArray
, ctx
->Shared
->Default1DArray
);
850 _mesa_reference_texobj(&texUnit
->Current2DArray
, ctx
->Shared
->Default2DArray
);