src/glx/x11/vertarr.c

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included 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  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 #include "glxclient.h"
  32 #include "indirect.h"
  33 #include "indirect_vertex_array.h"
  34
  35
  36 /*****************************************************************************/
  37
  38 /**
  39  * \name Vertex array pointer bridge functions
  40  *
  41  * When EXT_vertex_array was moved into the core GL spec, the \c count
  42  * parameter was lost.  This libGL really only wants to implement the GL 1.1
  43  * version, but we need to support applications that were written to the old
  44  * interface.  These bridge functions are part of the glue that makes this
  45  * happen.
  46  */
  47 /*@{*/
  48 void __indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
  49                             GLsizei count, const GLvoid * pointer )
  50 {
  51     (void) count; __indirect_glColorPointer( size, type, stride, pointer );
  52 }
  53
  54 void __indirect_glEdgeFlagPointerEXT(GLsizei stride,
  55                                GLsizei count, const GLboolean * pointer )
  56 {
  57     (void) count; __indirect_glEdgeFlagPointer( stride, pointer );
  58 }
  59
  60 void __indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
  61                             GLsizei count, const GLvoid * pointer )
  62 {
  63     (void) count; __indirect_glIndexPointer( type, stride, pointer );
  64 }
  65
  66 void __indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
  67                              const GLvoid * pointer )
  68 {
  69     (void) count; __indirect_glNormalPointer( type, stride, pointer );
  70 }
  71
  72 void __indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
  73                                GLsizei count, const GLvoid * pointer )
  74 {
  75     (void) count; __indirect_glTexCoordPointer( size, type, stride, pointer );
  76 }
  77
  78 void __indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
  79                             GLsizei count, const GLvoid * pointer )
  80 {
  81     (void) count; __indirect_glVertexPointer( size, type, stride, pointer );
  82 }
  83 /*@}*/
  84
  85 /*****************************************************************************/
  86
  87 void __indirect_glInterleavedArrays(GLenum format, GLsizei stride, const GLvoid *pointer)
  88 {
  89     __GLXcontext *gc = __glXGetCurrentContext();
  90     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
  91
  92 #define NONE  {0, 0, 0}
  93 #define F(x)  {GL_FLOAT, x, x * sizeof(GLfloat)}
  94 #define UB4   {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
  95
  96     /* Each row in this array describes the elements of a particular
  97      * interleaved array mode.  Each column describes, in the order in which
  98      * they appear in the interleaved arrays, one of the four possible types
  99      * of vertex data that can appear in an interleaved array.
 100      */
 101     struct {
 102         /**
 103          * The enum describing the GL type, as would be passed to the
 104          * appropriate gl*Pointer function.
 105          */
 106         GLushort type;
 107
 108         /**
 109          * Number of elements in the subarray, as would be passed (as the
 110          * \c size parameter) to the appropriate gl*Pointer function.
 111          */
 112         GLubyte count;
 113
 114         /**
 115          * True size of a single element in the subarray, as would be passed
 116          * (as the \c stride parameter) to the appropriate gl*Pointer
 117          * function.
 118          */
 119         GLubyte size;
 120     }
 121     static const modes[14][4] = {
 122       /* texture color normal vertex */
 123         {NONE,   NONE, NONE,  F(2)}, /* GL_V2F */
 124         {NONE,   NONE, NONE,  F(3)}, /* GL_V3F */
 125         {NONE,   UB4,  NONE,  F(2)}, /* GL_C4UB_V2F */
 126         {NONE,   UB4,  NONE,  F(3)}, /* GL_C4UB_V3F */
 127         {NONE,   F(3), NONE,  F(3)}, /* GL_C3F_V3F */
 128         {NONE,   NONE, F(3),  F(3)}, /* GL_N3F_V3F */
 129         {NONE,   F(4), F(3),  F(3)}, /* GL_C4F_N3F_V3F */
 130         {F(2),   NONE, NONE,  F(3)}, /* GL_T2F_V3F */
 131         {F(4),   NONE, NONE,  F(4)}, /* GL_T4F_V4F */
 132         {F(2),   UB4,  NONE,  F(3)}, /* GL_T2F_C4UB_V3F */
 133         {F(2),   F(3), NONE,  F(3)}, /* GL_T2F_C3F_V3F */
 134         {F(2),   NONE, F(3),  F(3)}, /* GL_T2F_N3F_V3F */
 135         {F(2),   F(4), F(3),  F(3)}, /* GL_T2F_C4F_N3F_V3F */
 136         {F(4),   F(4), F(3),  F(4)}, /* GL_T4F_C4F_N3F_V4F */
 137     };
 138 #undef NONE
 139 #undef F
 140 #undef UB4
 141
 142     GLint trueStride, size;
 143     int offsets[4];
 144     unsigned i;
 145     const int idx = format - GL_V2F;
 146
 147
 148     /* All valid formats are on the range [GL_V2F, GL_V2F+0x0D].  Since idx
 149      * is just the format biased by -GL_V2F, all valid idx values are on the
 150      * range [0, 0x0D].
 151      */
 152     if ( (idx < 0) || (idx > 0x0D) ) {
 153         __glXSetError(gc, GL_INVALID_ENUM);
 154         return;
 155     }
 156
 157     if ( stride < 0 ) {
 158         __glXSetError(gc, GL_INVALID_VALUE);
 159         return;
 160     }
 161
 162
 163     /* If the 'count' for a subarray is non-zero, then the offset of its
 164      * first element is at the currently accumulated 'size'.
 165      */
 166     size = 0;
 167     for ( i = 0 ; i < 4 ; i++ ) {
 168         offsets[i] = (modes[idx][i].count != 0) ? size : -1;
 169         size += modes[idx][i].size;
 170     }
 171
 172     trueStride = (stride == 0) ? size : stride;
 173
 174     __glXArrayDisableAll( state );
 175
 176     if ( offsets[0] >= 0 ) {
 177         __indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 178         __indirect_glTexCoordPointer( modes[idx][0].count, GL_FLOAT,
 179                                       trueStride,
 180                                       (const char *) pointer );
 181     }
 182     if ( offsets[1] >= 0 ) {
 183         __indirect_glEnableClientState(GL_COLOR_ARRAY);
 184         __indirect_glColorPointer( modes[idx][1].count, modes[idx][1].type,
 185                                    trueStride,
 186                                    (const char *) pointer + offsets[1] );
 187     }
 188     if ( offsets[2] >= 0 ) {
 189         __indirect_glEnableClientState(GL_NORMAL_ARRAY);
 190         __indirect_glNormalPointer( GL_FLOAT, trueStride,
 191                                     (const char *)pointer + offsets[2] );
 192     }
 193     __indirect_glEnableClientState(GL_VERTEX_ARRAY);
 194     __indirect_glVertexPointer( modes[idx][3].count, GL_FLOAT,
 195                                 trueStride,
 196                                 (const char *)pointer + offsets[3] );
 197 }