reactos/dll/opengl/mesa/vbo/vbo_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.3
   4  *
   5  * Copyright (C) 1999-2005  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 #include <precomp.h>
  29
  30 #define NR_MAT_ATTRIBS 12
  31
  32 static GLuint check_size( const GLfloat *attr )
  33 {
  34    if (attr[3] != 1.0) return 4;
  35    if (attr[2] != 0.0) return 3;
  36    if (attr[1] != 0.0) return 2;
  37    return 1;
  38 }
  39
  40
  41 static void init_legacy_currval(struct gl_context *ctx)
  42 {
  43    struct vbo_context *vbo = vbo_context(ctx);
  44    struct gl_client_array *arrays = vbo->legacy_currval;
  45    GLuint i;
  46
  47    memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_MAX);
  48
  49    /* Set up a constant (StrideB == 0) array for each current
  50     * attribute:
  51     */
  52    for (i = 0; i < VERT_ATTRIB_MAX; i++) {
  53       struct gl_client_array *cl = &arrays[i];
  54
  55       /* Size will have to be determined at runtime:
  56        */
  57       cl->Size = check_size(ctx->Current.Attrib[i]);
  58       cl->Stride = 0;
  59       cl->StrideB = 0;
  60       cl->Enabled = 1;
  61       cl->Type = GL_FLOAT;
  62       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  63       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  64       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  65                                     ctx->Shared->NullBufferObj);
  66    }
  67 }
  68
  69
  70 static void init_mat_currval(struct gl_context *ctx)
  71 {
  72    struct vbo_context *vbo = vbo_context(ctx);
  73    struct gl_client_array *arrays = vbo->mat_currval;
  74    GLuint i;
  75
  76    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
  77
  78    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
  79
  80    /* Set up a constant (StrideB == 0) array for each current
  81     * attribute:
  82     */
  83    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
  84       struct gl_client_array *cl = &arrays[i];
  85
  86       /* Size is fixed for the material attributes, for others will
  87        * be determined at runtime:
  88        */
  89       switch (i) {
  90       case MAT_ATTRIB_FRONT_SHININESS:
  91       case MAT_ATTRIB_BACK_SHININESS:
  92          cl->Size = 1;
  93          break;
  94       case MAT_ATTRIB_FRONT_INDEXES:
  95       case MAT_ATTRIB_BACK_INDEXES:
  96          cl->Size = 3;
  97          break;
  98       default:
  99          cl->Size = 4;
 100          break;
 101       }
 102
 103       cl->Ptr = (const void*)ctx->Light.Material.Attrib[i];
 104       cl->Type = GL_FLOAT;
 105       cl->Stride = 0;
 106       cl->StrideB = 0;
 107       cl->Enabled = 1;
 108       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 109       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 110                                     ctx->Shared->NullBufferObj);
 111    }
 112 }
 113
 114
 115 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 116 {
 117    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 118
 119    ctx->swtnl_im = (void *)vbo;
 120
 121    /* Initialize the arrayelt helper
 122     */
 123    if (!ctx->aelt_context &&
 124        !_ae_create_context( ctx )) {
 125       return GL_FALSE;
 126    }
 127
 128    /* TODO: remove these pointers.
 129     */
 130    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 131    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 132
 133    init_legacy_currval( ctx );
 134    init_mat_currval( ctx );
 135
 136
 137    /* Hook our functions into exec and compile dispatch tables.  These
 138     * will pretty much be permanently installed, which means that the
 139     * vtxfmt mechanism can be removed now.
 140     */
 141    vbo_exec_init( ctx );
 142    vbo_save_init( ctx );
 143
 144    _math_init_eval();
 145
 146    return GL_TRUE;
 147 }
 148
 149
 150 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 151 {
 152    vbo_exec_invalidate_state(ctx, new_state);
 153 }
 154
 155
 156 void _vbo_DestroyContext( struct gl_context *ctx )
 157 {
 158    struct vbo_context *vbo = vbo_context(ctx);
 159
 160    if (ctx->aelt_context) {
 161       _ae_destroy_context( ctx );
 162       ctx->aelt_context = NULL;
 163    }
 164
 165    if (vbo) {
 166       GLuint i;
 167
 168       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 169          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 170       }
 171
 172       vbo_exec_destroy(ctx);
 173       vbo_save_destroy(ctx);
 174       FREE(vbo);
 175       ctx->swtnl_im = NULL;
 176    }
 177 }
 178
 179
 180 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 181 {
 182    struct vbo_context *vbo = vbo_context(ctx);
 183    vbo->draw_prims = func;
 184 }
 185