src/glx/x11/vertarr.c

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