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 * Raster position operations.
39 #include "simple_list.h"
42 #include "math/m_matrix.h"
46 * Clip a point against the view volume.
48 * \param v vertex vector describing the point to clip.
50 * \return zero if outside view volume, or one if inside.
53 viewclip_point( const GLfloat v
[] )
55 if ( v
[0] > v
[3] || v
[0] < -v
[3]
56 || v
[1] > v
[3] || v
[1] < -v
[3]
57 || v
[2] > v
[3] || v
[2] < -v
[3] ) {
67 * Clip a point against the far/near Z clipping planes.
69 * \param v vertex vector describing the point to clip.
71 * \return zero if outside view volume, or one if inside.
74 viewclip_point_z( const GLfloat v
[] )
76 if (v
[2] > v
[3] || v
[2] < -v
[3] ) {
86 * Clip a point against the user clipping planes.
88 * \param ctx GL context.
89 * \param v vertex vector describing the point to clip.
91 * \return zero if the point was clipped, or one otherwise.
94 userclip_point( GLcontext
*ctx
, const GLfloat v
[] )
98 for (p
= 0; p
< ctx
->Const
.MaxClipPlanes
; p
++) {
99 if (ctx
->Transform
.ClipPlanesEnabled
& (1 << p
)) {
100 GLfloat dot
= v
[0] * ctx
->Transform
._ClipUserPlane
[p
][0]
101 + v
[1] * ctx
->Transform
._ClipUserPlane
[p
][1]
102 + v
[2] * ctx
->Transform
._ClipUserPlane
[p
][2]
103 + v
[3] * ctx
->Transform
._ClipUserPlane
[p
][3];
115 * Compute lighting for the raster position. Both RGB and CI modes computed.
116 * \param ctx the context
117 * \param vertex vertex location
118 * \param normal normal vector
119 * \param Rcolor returned color
120 * \param Rspec returned specular color (if separate specular enabled)
121 * \param Rindex returned color index
124 shade_rastpos(GLcontext
*ctx
,
125 const GLfloat vertex
[4],
126 const GLfloat normal
[3],
131 /*const*/ GLfloat (*base
)[3] = ctx
->Light
._BaseColor
;
132 const struct gl_light
*light
;
133 GLfloat diffuseColor
[4], specularColor
[4]; /* for RGB mode only */
134 GLfloat diffuseCI
= 0.0, specularCI
= 0.0; /* for CI mode only */
136 _mesa_validate_all_lighting_tables( ctx
);
138 COPY_3V(diffuseColor
, base
[0]);
139 diffuseColor
[3] = CLAMP(
140 ctx
->Light
.Material
.Attrib
[MAT_ATTRIB_FRONT_DIFFUSE
][3], 0.0F
, 1.0F
);
141 ASSIGN_4V(specularColor
, 0.0, 0.0, 0.0, 0.0);
143 foreach (light
, &ctx
->Light
.EnabledList
) {
144 GLfloat attenuation
= 1.0;
145 GLfloat VP
[3]; /* vector from vertex to light pos */
147 GLfloat diffuseContrib
[3], specularContrib
[3];
149 if (!(light
->_Flags
& LIGHT_POSITIONAL
)) {
150 /* light at infinity */
151 COPY_3V(VP
, light
->_VP_inf_norm
);
152 attenuation
= light
->_VP_inf_spot_attenuation
;
155 /* local/positional light */
158 /* VP = vector from vertex pos to light[i].pos */
159 SUB_3V(VP
, light
->_Position
, vertex
);
161 d
= (GLfloat
) LEN_3FV( VP
);
164 GLfloat invd
= 1.0F
/ d
;
165 SELF_SCALE_SCALAR_3V(VP
, invd
);
169 attenuation
= 1.0F
/ (light
->ConstantAttenuation
+ d
*
170 (light
->LinearAttenuation
+ d
*
171 light
->QuadraticAttenuation
));
173 if (light
->_Flags
& LIGHT_SPOT
) {
174 GLfloat PV_dot_dir
= - DOT3(VP
, light
->_NormDirection
);
176 if (PV_dot_dir
<light
->_CosCutoff
) {
180 double x
= PV_dot_dir
* (EXP_TABLE_SIZE
-1);
182 GLfloat spot
= (GLfloat
) (light
->_SpotExpTable
[k
][0]
183 + (x
-k
)*light
->_SpotExpTable
[k
][1]);
189 if (attenuation
< 1e-3)
192 n_dot_VP
= DOT3( normal
, VP
);
194 if (n_dot_VP
< 0.0F
) {
195 ACC_SCALE_SCALAR_3V(diffuseColor
, attenuation
, light
->_MatAmbient
[0]);
199 /* Ambient + diffuse */
200 COPY_3V(diffuseContrib
, light
->_MatAmbient
[0]);
201 ACC_SCALE_SCALAR_3V(diffuseContrib
, n_dot_VP
, light
->_MatDiffuse
[0]);
202 diffuseCI
+= n_dot_VP
* light
->_dli
* attenuation
;
209 ASSIGN_3V(specularContrib
, 0.0, 0.0, 0.0);
211 if (ctx
->Light
.Model
.LocalViewer
) {
219 else if (light
->_Flags
& LIGHT_POSITIONAL
) {
220 ACC_3V(VP
, ctx
->_EyeZDir
);
225 h
= light
->_h_inf_norm
;
228 n_dot_h
= DOT3(normal
, h
);
230 if (n_dot_h
> 0.0F
) {
232 GET_SHINE_TAB_ENTRY( ctx
->_ShineTable
[0], n_dot_h
, spec_coef
);
234 if (spec_coef
> 1.0e-10) {
235 if (ctx
->Light
.Model
.ColorControl
==GL_SEPARATE_SPECULAR_COLOR
) {
236 ACC_SCALE_SCALAR_3V( specularContrib
, spec_coef
,
237 light
->_MatSpecular
[0]);
240 ACC_SCALE_SCALAR_3V( diffuseContrib
, spec_coef
,
241 light
->_MatSpecular
[0]);
243 /*assert(light->_sli > 0.0);*/
244 specularCI
+= spec_coef
* light
->_sli
* attenuation
;
249 ACC_SCALE_SCALAR_3V( diffuseColor
, attenuation
, diffuseContrib
);
250 ACC_SCALE_SCALAR_3V( specularColor
, attenuation
, specularContrib
);
253 if (ctx
->Visual
.rgbMode
) {
254 Rcolor
[0] = CLAMP(diffuseColor
[0], 0.0F
, 1.0F
);
255 Rcolor
[1] = CLAMP(diffuseColor
[1], 0.0F
, 1.0F
);
256 Rcolor
[2] = CLAMP(diffuseColor
[2], 0.0F
, 1.0F
);
257 Rcolor
[3] = CLAMP(diffuseColor
[3], 0.0F
, 1.0F
);
258 Rspec
[0] = CLAMP(specularColor
[0], 0.0F
, 1.0F
);
259 Rspec
[1] = CLAMP(specularColor
[1], 0.0F
, 1.0F
);
260 Rspec
[2] = CLAMP(specularColor
[2], 0.0F
, 1.0F
);
261 Rspec
[3] = CLAMP(specularColor
[3], 0.0F
, 1.0F
);
264 GLfloat
*ind
= ctx
->Light
.Material
.Attrib
[MAT_ATTRIB_FRONT_INDEXES
];
265 GLfloat d_a
= ind
[MAT_INDEX_DIFFUSE
] - ind
[MAT_INDEX_AMBIENT
];
266 GLfloat s_a
= ind
[MAT_INDEX_SPECULAR
] - ind
[MAT_INDEX_AMBIENT
];
267 GLfloat i
= (ind
[MAT_INDEX_AMBIENT
]
268 + diffuseCI
* (1.0F
-specularCI
) * d_a
270 if (i
> ind
[MAT_INDEX_SPECULAR
]) {
271 i
= ind
[MAT_INDEX_SPECULAR
];
279 * Do texgen needed for glRasterPos.
280 * \param ctx rendering context
281 * \param vObj object-space vertex coordinate
282 * \param vEye eye-space vertex coordinate
283 * \param normal vertex normal
284 * \param unit texture unit number
285 * \param texcoord incoming texcoord and resulting texcoord
288 compute_texgen(GLcontext
*ctx
, const GLfloat vObj
[4], const GLfloat vEye
[4],
289 const GLfloat normal
[3], GLuint unit
, GLfloat texcoord
[4])
291 const struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
293 /* always compute sphere map terms, just in case */
294 GLfloat u
[3], two_nu
, rx
, ry
, rz
, m
, mInv
;
297 two_nu
= 2.0F
* DOT3(normal
, u
);
298 rx
= u
[0] - normal
[0] * two_nu
;
299 ry
= u
[1] - normal
[1] * two_nu
;
300 rz
= u
[2] - normal
[2] * two_nu
;
301 m
= rx
* rx
+ ry
* ry
+ (rz
+ 1.0F
) * (rz
+ 1.0F
);
303 mInv
= 0.5F
* _mesa_inv_sqrtf(m
);
307 if (texUnit
->TexGenEnabled
& S_BIT
) {
308 switch (texUnit
->GenModeS
) {
309 case GL_OBJECT_LINEAR
:
310 texcoord
[0] = DOT4(vObj
, texUnit
->ObjectPlaneS
);
313 texcoord
[0] = DOT4(vEye
, texUnit
->EyePlaneS
);
316 texcoord
[0] = rx
* mInv
+ 0.5F
;
318 case GL_REFLECTION_MAP
:
322 texcoord
[0] = normal
[0];
325 _mesa_problem(ctx
, "Bad S texgen in compute_texgen()");
330 if (texUnit
->TexGenEnabled
& T_BIT
) {
331 switch (texUnit
->GenModeT
) {
332 case GL_OBJECT_LINEAR
:
333 texcoord
[1] = DOT4(vObj
, texUnit
->ObjectPlaneT
);
336 texcoord
[1] = DOT4(vEye
, texUnit
->EyePlaneT
);
339 texcoord
[1] = ry
* mInv
+ 0.5F
;
341 case GL_REFLECTION_MAP
:
345 texcoord
[1] = normal
[1];
348 _mesa_problem(ctx
, "Bad T texgen in compute_texgen()");
353 if (texUnit
->TexGenEnabled
& R_BIT
) {
354 switch (texUnit
->GenModeR
) {
355 case GL_OBJECT_LINEAR
:
356 texcoord
[2] = DOT4(vObj
, texUnit
->ObjectPlaneR
);
359 texcoord
[2] = DOT4(vEye
, texUnit
->EyePlaneR
);
361 case GL_REFLECTION_MAP
:
365 texcoord
[2] = normal
[2];
368 _mesa_problem(ctx
, "Bad R texgen in compute_texgen()");
373 if (texUnit
->TexGenEnabled
& Q_BIT
) {
374 switch (texUnit
->GenModeQ
) {
375 case GL_OBJECT_LINEAR
:
376 texcoord
[3] = DOT4(vObj
, texUnit
->ObjectPlaneQ
);
379 texcoord
[3] = DOT4(vEye
, texUnit
->EyePlaneQ
);
382 _mesa_problem(ctx
, "Bad Q texgen in compute_texgen()");
391 * Set the raster position for pixel operations.
393 * All glRasterPos command call this function to update the current
396 * \param ctx GL context.
397 * \param x x coordinate for the raster position.
398 * \param y y coordinate for the raster position.
399 * \param z z coordinate for the raster position.
400 * \param w w coordinate for the raster position.
402 * \sa Called by _mesa_RasterPos4f().
404 * Flushes the vertices, transforms and clips the vertex coordinates, and
405 * finally sets the current raster position and associated data in
406 * __GLcontextRec::Current. When in selection mode calls
407 * _mesa_update_hitflag() with the current raster position.
410 raster_pos4f(GLcontext
*ctx
, GLfloat x
, GLfloat y
, GLfloat z
, GLfloat w
)
412 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
413 FLUSH_CURRENT(ctx
, 0);
416 _mesa_update_state( ctx
);
418 if (ctx
->VertexProgram
._Enabled
) {
419 /* XXX implement this */
420 _mesa_problem(ctx
, "Vertex programs not implemented for glRasterPos");
424 GLfloat obj
[4], eye
[4], clip
[4], ndc
[3], d
;
425 GLfloat
*norm
, eyenorm
[3];
426 GLfloat
*objnorm
= ctx
->Current
.Attrib
[VERT_ATTRIB_NORMAL
];
428 ASSIGN_4V( obj
, x
, y
, z
, w
);
429 /* apply modelview matrix: eye = MV * obj */
430 TRANSFORM_POINT( eye
, ctx
->ModelviewMatrixStack
.Top
->m
, obj
);
431 /* apply projection matrix: clip = Proj * eye */
432 TRANSFORM_POINT( clip
, ctx
->ProjectionMatrixStack
.Top
->m
, eye
);
434 /* clip to view volume */
435 if (ctx
->Transform
.RasterPositionUnclipped
) {
436 /* GL_IBM_rasterpos_clip: only clip against Z */
437 if (viewclip_point_z(clip
) == 0) {
438 ctx
->Current
.RasterPosValid
= GL_FALSE
;
442 else if (viewclip_point(clip
) == 0) {
443 /* Normal OpenGL behaviour */
444 ctx
->Current
.RasterPosValid
= GL_FALSE
;
448 /* clip to user clipping planes */
449 if (ctx
->Transform
.ClipPlanesEnabled
&& !userclip_point(ctx
, clip
)) {
450 ctx
->Current
.RasterPosValid
= GL_FALSE
;
455 d
= (clip
[3] == 0.0F
) ? 1.0F
: 1.0F
/ clip
[3];
456 ndc
[0] = clip
[0] * d
;
457 ndc
[1] = clip
[1] * d
;
458 ndc
[2] = clip
[2] * d
;
459 /* wincoord = viewport_mapping(ndc) */
460 ctx
->Current
.RasterPos
[0] = (ndc
[0] * ctx
->Viewport
._WindowMap
.m
[MAT_SX
]
461 + ctx
->Viewport
._WindowMap
.m
[MAT_TX
]);
462 ctx
->Current
.RasterPos
[1] = (ndc
[1] * ctx
->Viewport
._WindowMap
.m
[MAT_SY
]
463 + ctx
->Viewport
._WindowMap
.m
[MAT_TY
]);
464 ctx
->Current
.RasterPos
[2] = (ndc
[2] * ctx
->Viewport
._WindowMap
.m
[MAT_SZ
]
465 + ctx
->Viewport
._WindowMap
.m
[MAT_TZ
])
466 / ctx
->DrawBuffer
->_DepthMaxF
;
467 ctx
->Current
.RasterPos
[3] = clip
[3];
469 /* compute raster distance */
470 if (ctx
->Fog
.FogCoordinateSource
== GL_FOG_COORDINATE_EXT
)
471 ctx
->Current
.RasterDistance
= ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
][0];
473 ctx
->Current
.RasterDistance
=
474 SQRTF( eye
[0]*eye
[0] + eye
[1]*eye
[1] + eye
[2]*eye
[2] );
476 /* compute transformed normal vector (for lighting or texgen) */
477 if (ctx
->_NeedEyeCoords
) {
478 const GLfloat
*inv
= ctx
->ModelviewMatrixStack
.Top
->inv
;
479 TRANSFORM_NORMAL( eyenorm
, objnorm
, inv
);
486 /* update raster color */
487 if (ctx
->Light
.Enabled
) {
489 shade_rastpos( ctx
, obj
, norm
,
490 ctx
->Current
.RasterColor
,
491 ctx
->Current
.RasterSecondaryColor
,
492 &ctx
->Current
.RasterIndex
);
495 /* use current color or index */
496 if (ctx
->Visual
.rgbMode
) {
497 COPY_4FV(ctx
->Current
.RasterColor
,
498 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
]);
499 COPY_4FV(ctx
->Current
.RasterSecondaryColor
,
500 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
]);
503 ctx
->Current
.RasterIndex
504 = ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
][0];
511 for (u
= 0; u
< ctx
->Const
.MaxTextureCoordUnits
; u
++) {
513 COPY_4V(tc
, ctx
->Current
.Attrib
[VERT_ATTRIB_TEX0
+ u
]);
514 if (ctx
->Texture
.Unit
[u
].TexGenEnabled
) {
515 compute_texgen(ctx
, obj
, eye
, norm
, u
, tc
);
517 TRANSFORM_POINT(ctx
->Current
.RasterTexCoords
[u
],
518 ctx
->TextureMatrixStack
[u
].Top
->m
, tc
);
522 ctx
->Current
.RasterPosValid
= GL_TRUE
;
525 if (ctx
->RenderMode
== GL_SELECT
) {
526 _mesa_update_hitflag( ctx
, ctx
->Current
.RasterPos
[2] );
531 /** Calls _mesa_RasterPos4f() */
533 _mesa_RasterPos2d(GLdouble x
, GLdouble y
)
535 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, 0.0F
, 1.0F
);
538 /** Calls _mesa_RasterPos4f() */
540 _mesa_RasterPos2f(GLfloat x
, GLfloat y
)
542 _mesa_RasterPos4f(x
, y
, 0.0F
, 1.0F
);
545 /** Calls _mesa_RasterPos4f() */
547 _mesa_RasterPos2i(GLint x
, GLint y
)
549 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, 0.0F
, 1.0F
);
552 /** Calls _mesa_RasterPos4f() */
554 _mesa_RasterPos2s(GLshort x
, GLshort y
)
556 _mesa_RasterPos4f(x
, y
, 0.0F
, 1.0F
);
559 /** Calls _mesa_RasterPos4f() */
561 _mesa_RasterPos3d(GLdouble x
, GLdouble y
, GLdouble z
)
563 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, 1.0F
);
566 /** Calls _mesa_RasterPos4f() */
568 _mesa_RasterPos3f(GLfloat x
, GLfloat y
, GLfloat z
)
570 _mesa_RasterPos4f(x
, y
, z
, 1.0F
);
573 /** Calls _mesa_RasterPos4f() */
575 _mesa_RasterPos3i(GLint x
, GLint y
, GLint z
)
577 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, 1.0F
);
580 /** Calls _mesa_RasterPos4f() */
582 _mesa_RasterPos3s(GLshort x
, GLshort y
, GLshort z
)
584 _mesa_RasterPos4f(x
, y
, z
, 1.0F
);
587 /** Calls _mesa_RasterPos4f() */
589 _mesa_RasterPos4d(GLdouble x
, GLdouble y
, GLdouble z
, GLdouble w
)
591 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, (GLfloat
) w
);
594 /** Calls raster_pos4f() */
596 _mesa_RasterPos4f(GLfloat x
, GLfloat y
, GLfloat z
, GLfloat w
)
598 GET_CURRENT_CONTEXT(ctx
);
599 raster_pos4f(ctx
, x
, y
, z
, w
);
602 /** Calls _mesa_RasterPos4f() */
604 _mesa_RasterPos4i(GLint x
, GLint y
, GLint z
, GLint w
)
606 _mesa_RasterPos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, (GLfloat
) w
);
609 /** Calls _mesa_RasterPos4f() */
611 _mesa_RasterPos4s(GLshort x
, GLshort y
, GLshort z
, GLshort w
)
613 _mesa_RasterPos4f(x
, y
, z
, w
);
616 /** Calls _mesa_RasterPos4f() */
618 _mesa_RasterPos2dv(const GLdouble
*v
)
620 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1], 0.0F
, 1.0F
);
623 /** Calls _mesa_RasterPos4f() */
625 _mesa_RasterPos2fv(const GLfloat
*v
)
627 _mesa_RasterPos4f(v
[0], v
[1], 0.0F
, 1.0F
);
630 /** Calls _mesa_RasterPos4f() */
632 _mesa_RasterPos2iv(const GLint
*v
)
634 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1], 0.0F
, 1.0F
);
637 /** Calls _mesa_RasterPos4f() */
639 _mesa_RasterPos2sv(const GLshort
*v
)
641 _mesa_RasterPos4f(v
[0], v
[1], 0.0F
, 1.0F
);
644 /** Calls _mesa_RasterPos4f() */
646 _mesa_RasterPos3dv(const GLdouble
*v
)
648 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1], (GLfloat
) v
[2], 1.0F
);
651 /** Calls _mesa_RasterPos4f() */
653 _mesa_RasterPos3fv(const GLfloat
*v
)
655 _mesa_RasterPos4f(v
[0], v
[1], v
[2], 1.0F
);
658 /** Calls _mesa_RasterPos4f() */
660 _mesa_RasterPos3iv(const GLint
*v
)
662 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1], (GLfloat
) v
[2], 1.0F
);
665 /** Calls _mesa_RasterPos4f() */
667 _mesa_RasterPos3sv(const GLshort
*v
)
669 _mesa_RasterPos4f(v
[0], v
[1], v
[2], 1.0F
);
672 /** Calls _mesa_RasterPos4f() */
674 _mesa_RasterPos4dv(const GLdouble
*v
)
676 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1],
677 (GLfloat
) v
[2], (GLfloat
) v
[3]);
680 /** Calls _mesa_RasterPos4f() */
682 _mesa_RasterPos4fv(const GLfloat
*v
)
684 _mesa_RasterPos4f(v
[0], v
[1], v
[2], v
[3]);
687 /** Calls _mesa_RasterPos4f() */
689 _mesa_RasterPos4iv(const GLint
*v
)
691 _mesa_RasterPos4f((GLfloat
) v
[0], (GLfloat
) v
[1],
692 (GLfloat
) v
[2], (GLfloat
) v
[3]);
695 /** Calls _mesa_RasterPos4f() */
697 _mesa_RasterPos4sv(const GLshort
*v
)
699 _mesa_RasterPos4f(v
[0], v
[1], v
[2], v
[3]);
703 /**********************************************************************/
704 /*** GL_ARB_window_pos / GL_MESA_window_pos ***/
705 /**********************************************************************/
707 #if FEATURE_windowpos
709 * All glWindowPosMESA and glWindowPosARB commands call this function to
710 * update the current raster position.
713 window_pos3f(GLfloat x
, GLfloat y
, GLfloat z
)
715 GET_CURRENT_CONTEXT(ctx
);
718 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
719 FLUSH_CURRENT(ctx
, 0);
721 z2
= CLAMP(z
, 0.0F
, 1.0F
) * (ctx
->Viewport
.Far
- ctx
->Viewport
.Near
)
722 + ctx
->Viewport
.Near
;
724 /* set raster position */
725 ctx
->Current
.RasterPos
[0] = x
;
726 ctx
->Current
.RasterPos
[1] = y
;
727 ctx
->Current
.RasterPos
[2] = z2
;
728 ctx
->Current
.RasterPos
[3] = 1.0F
;
730 ctx
->Current
.RasterPosValid
= GL_TRUE
;
732 if (ctx
->Fog
.FogCoordinateSource
== GL_FOG_COORDINATE_EXT
)
733 ctx
->Current
.RasterDistance
= ctx
->Current
.Attrib
[VERT_ATTRIB_FOG
][0];
735 ctx
->Current
.RasterDistance
= 0.0;
737 /* raster color = current color or index */
738 if (ctx
->Visual
.rgbMode
) {
739 ctx
->Current
.RasterColor
[0]
740 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
][0], 0.0F
, 1.0F
);
741 ctx
->Current
.RasterColor
[1]
742 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
][1], 0.0F
, 1.0F
);
743 ctx
->Current
.RasterColor
[2]
744 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
][2], 0.0F
, 1.0F
);
745 ctx
->Current
.RasterColor
[3]
746 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
][3], 0.0F
, 1.0F
);
747 ctx
->Current
.RasterSecondaryColor
[0]
748 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
][0], 0.0F
, 1.0F
);
749 ctx
->Current
.RasterSecondaryColor
[1]
750 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
][1], 0.0F
, 1.0F
);
751 ctx
->Current
.RasterSecondaryColor
[2]
752 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
][2], 0.0F
, 1.0F
);
753 ctx
->Current
.RasterSecondaryColor
[3]
754 = CLAMP(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR1
][3], 0.0F
, 1.0F
);
757 ctx
->Current
.RasterIndex
758 = ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR_INDEX
][0];
761 /* raster texcoord = current texcoord */
764 for (texSet
= 0; texSet
< ctx
->Const
.MaxTextureCoordUnits
; texSet
++) {
765 COPY_4FV( ctx
->Current
.RasterTexCoords
[texSet
],
766 ctx
->Current
.Attrib
[VERT_ATTRIB_TEX0
+ texSet
] );
770 if (ctx
->RenderMode
==GL_SELECT
) {
771 _mesa_update_hitflag( ctx
, ctx
->Current
.RasterPos
[2] );
776 /* This is just to support the GL_MESA_window_pos version */
778 window_pos4f(GLfloat x
, GLfloat y
, GLfloat z
, GLfloat w
)
780 GET_CURRENT_CONTEXT(ctx
);
781 window_pos3f(x
, y
, z
);
782 ctx
->Current
.RasterPos
[3] = w
;
787 _mesa_WindowPos2dMESA(GLdouble x
, GLdouble y
)
789 window_pos4f((GLfloat
) x
, (GLfloat
) y
, 0.0F
, 1.0F
);
793 _mesa_WindowPos2fMESA(GLfloat x
, GLfloat y
)
795 window_pos4f(x
, y
, 0.0F
, 1.0F
);
799 _mesa_WindowPos2iMESA(GLint x
, GLint y
)
801 window_pos4f((GLfloat
) x
, (GLfloat
) y
, 0.0F
, 1.0F
);
805 _mesa_WindowPos2sMESA(GLshort x
, GLshort y
)
807 window_pos4f(x
, y
, 0.0F
, 1.0F
);
811 _mesa_WindowPos3dMESA(GLdouble x
, GLdouble y
, GLdouble z
)
813 window_pos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, 1.0F
);
817 _mesa_WindowPos3fMESA(GLfloat x
, GLfloat y
, GLfloat z
)
819 window_pos4f(x
, y
, z
, 1.0F
);
823 _mesa_WindowPos3iMESA(GLint x
, GLint y
, GLint z
)
825 window_pos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, 1.0F
);
829 _mesa_WindowPos3sMESA(GLshort x
, GLshort y
, GLshort z
)
831 window_pos4f(x
, y
, z
, 1.0F
);
835 _mesa_WindowPos4dMESA(GLdouble x
, GLdouble y
, GLdouble z
, GLdouble w
)
837 window_pos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, (GLfloat
) w
);
841 _mesa_WindowPos4fMESA(GLfloat x
, GLfloat y
, GLfloat z
, GLfloat w
)
843 window_pos4f(x
, y
, z
, w
);
847 _mesa_WindowPos4iMESA(GLint x
, GLint y
, GLint z
, GLint w
)
849 window_pos4f((GLfloat
) x
, (GLfloat
) y
, (GLfloat
) z
, (GLfloat
) w
);
853 _mesa_WindowPos4sMESA(GLshort x
, GLshort y
, GLshort z
, GLshort w
)
855 window_pos4f(x
, y
, z
, w
);
859 _mesa_WindowPos2dvMESA(const GLdouble
*v
)
861 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1], 0.0F
, 1.0F
);
865 _mesa_WindowPos2fvMESA(const GLfloat
*v
)
867 window_pos4f(v
[0], v
[1], 0.0F
, 1.0F
);
871 _mesa_WindowPos2ivMESA(const GLint
*v
)
873 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1], 0.0F
, 1.0F
);
877 _mesa_WindowPos2svMESA(const GLshort
*v
)
879 window_pos4f(v
[0], v
[1], 0.0F
, 1.0F
);
883 _mesa_WindowPos3dvMESA(const GLdouble
*v
)
885 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1], (GLfloat
) v
[2], 1.0F
);
889 _mesa_WindowPos3fvMESA(const GLfloat
*v
)
891 window_pos4f(v
[0], v
[1], v
[2], 1.0);
895 _mesa_WindowPos3ivMESA(const GLint
*v
)
897 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1], (GLfloat
) v
[2], 1.0F
);
901 _mesa_WindowPos3svMESA(const GLshort
*v
)
903 window_pos4f(v
[0], v
[1], v
[2], 1.0F
);
907 _mesa_WindowPos4dvMESA(const GLdouble
*v
)
909 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1],
910 (GLfloat
) v
[2], (GLfloat
) v
[3]);
914 _mesa_WindowPos4fvMESA(const GLfloat
*v
)
916 window_pos4f(v
[0], v
[1], v
[2], v
[3]);
920 _mesa_WindowPos4ivMESA(const GLint
*v
)
922 window_pos4f((GLfloat
) v
[0], (GLfloat
) v
[1],
923 (GLfloat
) v
[2], (GLfloat
) v
[3]);
927 _mesa_WindowPos4svMESA(const GLshort
*v
)
929 window_pos4f(v
[0], v
[1], v
[2], v
[3]);
937 * OpenGL implementation of glWindowPos*MESA()
939 void glWindowPos4fMESA( GLfloat x
, GLfloat y
, GLfloat z
, GLfloat w
)
943 /* Push current matrix mode and viewport attributes */
944 glPushAttrib( GL_TRANSFORM_BIT
| GL_VIEWPORT_BIT
);
946 /* Setup projection parameters */
947 glMatrixMode( GL_PROJECTION
);
950 glMatrixMode( GL_MODELVIEW
);
954 glDepthRange( z
, z
);
955 glViewport( (int) x
- 1, (int) y
- 1, 2, 2 );
957 /* set the raster (window) position */
960 glRasterPos4f( fx
, fy
, 0.0, w
);
962 /* restore matrices, viewport and matrix mode */
964 glMatrixMode( GL_PROJECTION
);
973 /**********************************************************************/
974 /** \name Initialization */
975 /**********************************************************************/
979 * Initialize the context current raster position information.
981 * \param ctx GL context.
983 * Initialize the current raster position information in
984 * __GLcontextRec::Current, and adds the extension entry points to the
987 void _mesa_init_rastpos( GLcontext
* ctx
)
991 ASSIGN_4V( ctx
->Current
.RasterPos
, 0.0, 0.0, 0.0, 1.0 );
992 ctx
->Current
.RasterDistance
= 0.0;
993 ASSIGN_4V( ctx
->Current
.RasterColor
, 1.0, 1.0, 1.0, 1.0 );
994 ASSIGN_4V( ctx
->Current
.RasterSecondaryColor
, 0.0, 0.0, 0.0, 1.0 );
995 ctx
->Current
.RasterIndex
= 1.0;
996 for (i
=0; i
<MAX_TEXTURE_UNITS
; i
++)
997 ASSIGN_4V( ctx
->Current
.RasterTexCoords
[i
], 0.0, 0.0, 0.0, 1.0 );
998 ctx
->Current
.RasterPosValid
= GL_TRUE
;