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/macros.h"
32 #include "main/imports.h"
33 #include "main/mtypes.h"
34
35 #include "math/m_xform.h"
36
37 #include "t_context.h"
38 #include "t_pipeline.h"
39
40 /* Is there any real benefit seperating texmat from texgen? It means
41 * we need two lots of intermediate storage. Any changes to
42 * _NEW_TEXTURE will invalidate both sets -- it's only on changes to
43 * *only* _NEW_TEXTURE_MATRIX that texgen survives but texmat doesn't.
44 *
45 * However, the seperation of this code from the complex texgen stuff
46 * is very appealing.
47 */
48 struct texmat_stage_data {
49 GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
50 };
51
52 #define TEXMAT_STAGE_DATA(stage) ((struct texmat_stage_data *)stage->privatePtr)
53
54
55
run_texmat_stage(struct gl_context * ctx,struct tnl_pipeline_stage * stage)56 static GLboolean run_texmat_stage( struct gl_context *ctx,
57 struct tnl_pipeline_stage *stage )
58 {
59 struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
60 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
61 GLuint i;
62
63 if (!ctx->Texture._TexMatEnabled || ctx->VertexProgram._Current)
64 return GL_TRUE;
65
66 /* ENABLE_TEXMAT implies that the texture matrix is not the
67 * identity, so we don't have to check that here.
68 */
69 for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
70 if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i)) {
71 (void) TransformRaw( &store->texcoord[i],
72 ctx->TextureMatrixStack[i].Top,
73 VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]);
74
75 VB->AttribPtr[VERT_ATTRIB_TEX0+i] = &store->texcoord[i];
76 }
77 }
78
79 return GL_TRUE;
80 }
81
82
83 /* Called the first time stage->run() is invoked.
84 */
alloc_texmat_data(struct gl_context * ctx,struct tnl_pipeline_stage * stage)85 static GLboolean alloc_texmat_data( struct gl_context *ctx,
86 struct tnl_pipeline_stage *stage )
87 {
88 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
89 struct texmat_stage_data *store;
90 GLuint i;
91
92 stage->privatePtr = CALLOC(sizeof(*store));
93 store = TEXMAT_STAGE_DATA(stage);
94 if (!store)
95 return GL_FALSE;
96
97 for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
98 _mesa_vector4f_alloc( &store->texcoord[i], 0, VB->Size, 32 );
99
100 return GL_TRUE;
101 }
102
103
free_texmat_data(struct tnl_pipeline_stage * stage)104 static void free_texmat_data( struct tnl_pipeline_stage *stage )
105 {
106 struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
107 GLuint i;
108
109 if (store) {
110 for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
111 if (store->texcoord[i].data)
112 _mesa_vector4f_free( &store->texcoord[i] );
113 FREE( store );
114 stage->privatePtr = NULL;
115 }
116 }
117
118
119
120 const struct tnl_pipeline_stage _tnl_texture_transform_stage =
121 {
122 "texture transform", /* name */
123 NULL, /* private data */
124 alloc_texmat_data,
125 free_texmat_data, /* destructor */
126 NULL,
127 run_texmat_stage,
128 };
129