reactos/dll/opengl/mesa/src/mesa/tnl/t_vb_texmat.c

   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;
  50 };
  51
  52 #define TEXMAT_STAGE_DATA(stage) ((struct texmat_stage_data *)stage->privatePtr)
  53
  54
  55
  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
  62    if (!ctx->Texture._TexMatEnabled)
  63       return GL_TRUE;
  64
  65    /* ENABLE_TEXMAT implies that the texture matrix is not the
  66     * identity, so we don't have to check that here.
  67     */
  68    if (ctx->Texture._TexMatEnabled) {
  69       (void) TransformRaw( &store->texcoord,
  70                   ctx->TextureMatrixStack.Top,
  71                   VB->AttribPtr[_TNL_ATTRIB_TEX]);
  72
  73       VB->AttribPtr[VERT_ATTRIB_TEX] = &store->texcoord;
  74    }
  75
  76    return GL_TRUE;
  77 }
  78
  79
  80 /* Called the first time stage->run() is invoked.
  81  */
  82 static GLboolean alloc_texmat_data( struct gl_context *ctx,
  83                                     struct tnl_pipeline_stage *stage )
  84 {
  85    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
  86    struct texmat_stage_data *store;
  87
  88    stage->privatePtr = CALLOC(sizeof(*store));
  89    store = TEXMAT_STAGE_DATA(stage);
  90    if (!store)
  91       return GL_FALSE;
  92
  93    _mesa_vector4f_alloc( &store->texcoord, 0, VB->Size, 32 );
  94
  95    return GL_TRUE;
  96 }
  97
  98
  99 static void free_texmat_data( struct tnl_pipeline_stage *stage )
 100 {
 101    struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
 102
 103    if (store) {
 104          if (store->texcoord.data)
 105             _mesa_vector4f_free( &store->texcoord );
 106       FREE( store );
 107       stage->privatePtr = NULL;
 108    }
 109 }
 110
 111
 112
 113 const struct tnl_pipeline_stage _tnl_texture_transform_stage =
 114 {
 115    "texture transform",                 /* name */
 116    NULL,                                /* private data */
 117    alloc_texmat_data,
 118    free_texmat_data,                    /* destructor */
 119    NULL,
 120    run_texmat_stage,
 121 };