src/glx/x11/vertarr.c

   1 /* $XFree86: xc/lib/GL/glx/vertarr.c,v 1.4 2001/03/25 05:32:00 tsi Exp $ */
   2 /*
   3 ** License Applicability. Except to the extent portions of this file are
   4 ** made subject to an alternative license as permitted in the SGI Free
   5 ** Software License B, Version 1.1 (the "License"), the contents of this
   6 ** file are subject only to the provisions of the License. You may not use
   7 ** this file except in compliance with the License. You may obtain a copy
   8 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   9 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  10 **
  11 ** http://oss.sgi.com/projects/FreeB
  12 **
  13 ** Note that, as provided in the License, the Software is distributed on an
  14 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  15 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  16 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  17 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  18 **
  19 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  20 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  21 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  22 ** Copyright in any portions created by third parties is as indicated
  23 ** elsewhere herein. All Rights Reserved.
  24 **
  25 ** Additional Notice Provisions: The application programming interfaces
  26 ** established by SGI in conjunction with the Original Code are The
  27 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  28 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  29 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  30 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  31 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  32 ** published by SGI, but has not been independently verified as being
  33 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  34 **
  35 */
  36
  37 #include "glxclient.h"
  38 #include "indirect.h"
  39 #include "indirect_vertex_array.h"
  40
  41
  42 /*****************************************************************************/
  43
  44 /**
  45  * \name Vertex array pointer bridge functions
  46  *
  47  * When EXT_vertex_array was moved into the core GL spec, the \c count
  48  * parameter was lost.  This libGL really only wants to implement the GL 1.1
  49  * version, but we need to support applications that were written to the old
  50  * interface.  These bridge functions are part of the glue that makes this
  51  * happen.
  52  */
  53 /*@{*/
  54 void __indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
  55                             GLsizei count, const GLvoid * pointer )
  56 {
  57     (void) count; __indirect_glColorPointer( size, type, stride, pointer );
  58 }
  59
  60 void __indirect_glEdgeFlagPointerEXT(GLsizei stride,
  61                                GLsizei count, const GLboolean * pointer )
  62 {
  63     (void) count; __indirect_glEdgeFlagPointer( stride, pointer );
  64 }
  65
  66 void __indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
  67                             GLsizei count, const GLvoid * pointer )
  68 {
  69     (void) count; __indirect_glIndexPointer( type, stride, pointer );
  70 }
  71
  72 void __indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
  73                              const GLvoid * pointer )
  74 {
  75     (void) count; __indirect_glNormalPointer( type, stride, pointer );
  76 }
  77
  78 void __indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
  79                                GLsizei count, const GLvoid * pointer )
  80 {
  81     (void) count; __indirect_glTexCoordPointer( size, type, stride, pointer );
  82 }
  83
  84 void __indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
  85                             GLsizei count, const GLvoid * pointer )
  86 {
  87     (void) count; __indirect_glVertexPointer( size, type, stride, pointer );
  88 }
  89 /*@}*/
  90
  91 /*****************************************************************************/
  92
  93 void __indirect_glInterleavedArrays(GLenum format, GLsizei stride, const GLvoid *pointer)
  94 {
  95     __GLXcontext *gc = __glXGetCurrentContext();
  96     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
  97
  98 #define NONE  {0, 0, 0}
  99 #define F(x)  {GL_FLOAT, x, x * sizeof(GLfloat)}
 100 #define UB4   {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
 101
 102     /* Each row in this array describes the elements of a particular
 103      * interleaved array mode.  Each column describes, in the order in which
 104      * they appear in the interleaved arrays, one of the four possible types
 105      * of vertex data that can appear in an interleaved array.
 106      */
 107     struct {
 108         /**
 109          * The enum describing the GL type, as would be passed to the
 110          * appropriate gl*Pointer function.
 111          */
 112         GLushort type;
 113
 114         /**
 115          * Number of elements in the subarray, as would be passed (as the
 116          * \c size parameter) to the appropriate gl*Pointer function.
 117          */
 118         GLubyte count;
 119
 120         /**
 121          * True size of a single element in the subarray, as would be passed
 122          * (as the \c stride parameter) to the appropriate gl*Pointer
 123          * function.
 124          */
 125         GLubyte size;
 126     }
 127     static const modes[14][4] = {
 128       /* texture color normal vertex */
 129         {NONE,   NONE, NONE,  F(2)}, /* GL_V2F */
 130         {NONE,   NONE, NONE,  F(3)}, /* GL_V3F */
 131         {NONE,   UB4,  NONE,  F(2)}, /* GL_C4UB_V2F */
 132         {NONE,   UB4,  NONE,  F(3)}, /* GL_C4UB_V3F */
 133         {NONE,   F(3), NONE,  F(3)}, /* GL_C3F_V3F */
 134         {NONE,   NONE, F(3),  F(3)}, /* GL_N3F_V3F */
 135         {NONE,   F(4), F(3),  F(3)}, /* GL_C4F_N3F_V3F */
 136         {F(2),   NONE, NONE,  F(3)}, /* GL_T2F_V3F */
 137         {F(4),   NONE, NONE,  F(4)}, /* GL_T4F_V4F */
 138         {F(2),   UB4,  NONE,  F(3)}, /* GL_T2F_C4UB_V3F */
 139         {F(2),   F(3), NONE,  F(3)}, /* GL_T2F_C3F_V3F */
 140         {F(2),   NONE, F(3),  F(3)}, /* GL_T2F_N3F_V3F */
 141         {F(2),   F(4), F(3),  F(3)}, /* GL_T2F_C4F_N3F_V3F */
 142         {F(4),   F(4), F(3),  F(4)}, /* GL_T4F_C4F_N3F_V4F */
 143     };
 144 #undef NONE
 145 #undef F
 146 #undef UB4
 147
 148     GLint trueStride, size;
 149     int offsets[4];
 150     unsigned i;
 151     const int idx = format - GL_V2F;
 152
 153
 154     /* All valid formats are on the range [GL_V2F, GL_V2F+0x0D].  Since idx
 155      * is just the format biased by -GL_V2F, all valid idx values are on the
 156      * range [0, 0x0D].
 157      */
 158     if ( (idx < 0) || (idx > 0x0D) ) {
 159         __glXSetError(gc, GL_INVALID_ENUM);
 160         return;
 161     }
 162
 163     if ( stride < 0 ) {
 164         __glXSetError(gc, GL_INVALID_VALUE);
 165         return;
 166     }
 167
 168
 169     /* If the 'count' for a subarray is non-zero, then the offset of its
 170      * first element is at the currently accumulated 'size'.
 171      */
 172     size = 0;
 173     for ( i = 0 ; i < 4 ; i++ ) {
 174         offsets[i] = (modes[idx][i].count != 0) ? size : -1;
 175         size += modes[idx][i].size;
 176     }
 177
 178     trueStride = (stride == 0) ? size : stride;
 179
 180     __glXArrayDisableAll( state );
 181
 182     if ( offsets[0] >= 0 ) {
 183         __indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 184         __indirect_glTexCoordPointer( modes[idx][0].count, GL_FLOAT,
 185                                       trueStride,
 186                                       (const char *) pointer );
 187     }
 188     if ( offsets[1] >= 0 ) {
 189         __indirect_glEnableClientState(GL_COLOR_ARRAY);
 190         __indirect_glColorPointer( modes[idx][1].count, modes[idx][1].type,
 191                                    trueStride,
 192                                    (const char *) pointer + offsets[1] );
 193     }
 194     if ( offsets[2] >= 0 ) {
 195         __indirect_glEnableClientState(GL_NORMAL_ARRAY);
 196         __indirect_glNormalPointer( GL_FLOAT, trueStride,
 197                                     (const char *)pointer + offsets[2] );
 198     }
 199     __indirect_glEnableClientState(GL_VERTEX_ARRAY);
 200     __indirect_glVertexPointer( modes[idx][3].count, GL_FLOAT,
 201                                 trueStride,
 202                                 (const char *)pointer + offsets[3] );
 203 }