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1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5
4 *
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
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.
23 *
24 * Authors:
25 * Keith Whitwell <keith@tungstengraphics.com>
26 */
27
28
29 #include "main/glheader.h"
30 #include "main/colormac.h"
31 #include "main/context.h"
32 #include "main/macros.h"
33 #include "main/imports.h"
34 #include "main/mtypes.h"
35
36 #include "math/m_xform.h"
37
38 #include "t_context.h"
39 #include "t_pipeline.h"
40
41 /* Is there any real benefit seperating texmat from texgen? It means
42 * we need two lots of intermediate storage. Any changes to
43 * _NEW_TEXTURE will invalidate both sets -- it's only on changes to
44 * *only* _NEW_TEXTURE_MATRIX that texgen survives but texmat doesn't.
45 *
46 * However, the seperation of this code from the complex texgen stuff
47 * is very appealing.
48 */
49 struct texmat_stage_data {
50 GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
51 };
52
53 #define TEXMAT_STAGE_DATA(stage) ((struct texmat_stage_data *)stage->privatePtr)
54
55
56
57 static GLboolean run_texmat_stage( GLcontext *ctx,
58 struct tnl_pipeline_stage *stage )
59 {
60 struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
61 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
62 GLuint i;
63
64 if (!ctx->Texture._TexMatEnabled || ctx->VertexProgram._Current)
65 return GL_TRUE;
66
67 /* ENABLE_TEXMAT implies that the texture matrix is not the
68 * identity, so we don't have to check that here.
69 */
70 for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
71 if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i)) {
72 (void) TransformRaw( &store->texcoord[i],
73 ctx->TextureMatrixStack[i].Top,
74 VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]);
75
76 VB->AttribPtr[VERT_ATTRIB_TEX0+i] = &store->texcoord[i];
77 }
78 }
79
80 return GL_TRUE;
81 }
82
83
84 /* Called the first time stage->run() is invoked.
85 */
86 static GLboolean alloc_texmat_data( GLcontext *ctx,
87 struct tnl_pipeline_stage *stage )
88 {
89 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
90 struct texmat_stage_data *store;
91 GLuint i;
92
93 stage->privatePtr = CALLOC(sizeof(*store));
94 store = TEXMAT_STAGE_DATA(stage);
95 if (!store)
96 return GL_FALSE;
97
98 for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
99 _mesa_vector4f_alloc( &store->texcoord[i], 0, VB->Size, 32 );
100
101 return GL_TRUE;
102 }
103
104
105 static void free_texmat_data( struct tnl_pipeline_stage *stage )
106 {
107 struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
108 GLuint i;
109
110 if (store) {
111 for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
112 if (store->texcoord[i].data)
113 _mesa_vector4f_free( &store->texcoord[i] );
114 FREE( store );
115 stage->privatePtr = NULL;
116 }
117 }
118
119
120
121 const struct tnl_pipeline_stage _tnl_texture_transform_stage =
122 {
123 "texture transform", /* name */
124 NULL, /* private data */
125 alloc_texmat_data,
126 free_texmat_data, /* destructor */
127 NULL,
128 run_texmat_stage,
129 };