src/glx/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
  49 __indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
  50                              GLsizei count, const GLvoid * pointer)
  51 {
  52    (void) count;
  53    __indirect_glColorPointer(size, type, stride, pointer);
  54 }
  55
  56 void
  57 __indirect_glEdgeFlagPointerEXT(GLsizei stride,
  58                                 GLsizei count, const GLboolean * pointer)
  59 {
  60    (void) count;
  61    __indirect_glEdgeFlagPointer(stride, pointer);
  62 }
  63
  64 void
  65 __indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
  66                              GLsizei count, const GLvoid * pointer)
  67 {
  68    (void) count;
  69    __indirect_glIndexPointer(type, stride, pointer);
  70 }
  71
  72 void
  73 __indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
  74                               const GLvoid * pointer)
  75 {
  76    (void) count;
  77    __indirect_glNormalPointer(type, stride, pointer);
  78 }
  79
  80 void
  81 __indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
  82                                 GLsizei count, const GLvoid * pointer)
  83 {
  84    (void) count;
  85    __indirect_glTexCoordPointer(size, type, stride, pointer);
  86 }
  87
  88 void
  89 __indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
  90                               GLsizei count, const GLvoid * pointer)
  91 {
  92    (void) count;
  93    __indirect_glVertexPointer(size, type, stride, pointer);
  94 }
  95
  96 /*@}*/
  97
  98 /*****************************************************************************/
  99
 100 void
 101 __indirect_glInterleavedArrays(GLenum format, GLsizei stride,
 102                                const GLvoid * pointer)
 103 {
 104    __GLXcontext *gc = __glXGetCurrentContext();
 105    __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
 106
 107 #define NONE  {0, 0, 0}
 108 #define F(x)  {GL_FLOAT, x, x * sizeof(GLfloat)}
 109 #define UB4   {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
 110
 111    /* Each row in this array describes the elements of a particular
 112     * interleaved array mode.  Each column describes, in the order in which
 113     * they appear in the interleaved arrays, one of the four possible types
 114     * of vertex data that can appear in an interleaved array.
 115     */
 116    struct
 117    {
 118         /**
 119          * The enum describing the GL type, as would be passed to the
 120          * appropriate gl*Pointer function.
 121          */
 122       GLushort type;
 123
 124         /**
 125          * Number of elements in the subarray, as would be passed (as the
 126          * \c size parameter) to the appropriate gl*Pointer function.
 127          */
 128       GLubyte count;
 129
 130         /**
 131          * True size of a single element in the subarray, as would be passed
 132          * (as the \c stride parameter) to the appropriate gl*Pointer
 133          * function.
 134          */
 135       GLubyte size;
 136    }
 137    static const modes[14][4] = {
 138       /* texture color normal vertex */
 139       {NONE, NONE, NONE, F(2)}, /* GL_V2F */
 140       {NONE, NONE, NONE, F(3)}, /* GL_V3F */
 141       {NONE, UB4, NONE, F(2)},  /* GL_C4UB_V2F */
 142       {NONE, UB4, NONE, F(3)},  /* GL_C4UB_V3F */
 143       {NONE, F(3), NONE, F(3)}, /* GL_C3F_V3F */
 144       {NONE, NONE, F(3), F(3)}, /* GL_N3F_V3F */
 145       {NONE, F(4), F(3), F(3)}, /* GL_C4F_N3F_V3F */
 146       {F(2), NONE, NONE, F(3)}, /* GL_T2F_V3F */
 147       {F(4), NONE, NONE, F(4)}, /* GL_T4F_V4F */
 148       {F(2), UB4, NONE, F(3)},  /* GL_T2F_C4UB_V3F */
 149       {F(2), F(3), NONE, F(3)}, /* GL_T2F_C3F_V3F */
 150       {F(2), NONE, F(3), F(3)}, /* GL_T2F_N3F_V3F */
 151       {F(2), F(4), F(3), F(3)}, /* GL_T2F_C4F_N3F_V3F */
 152       {F(4), F(4), F(3), F(4)}, /* GL_T4F_C4F_N3F_V4F */
 153    };
 154 #undef NONE
 155 #undef F
 156 #undef UB4
 157
 158    GLint trueStride, size;
 159    int offsets[4];
 160    unsigned i;
 161    const int idx = format - GL_V2F;
 162
 163
 164    /* All valid formats are on the range [GL_V2F, GL_V2F+0x0D].  Since idx
 165     * is just the format biased by -GL_V2F, all valid idx values are on the
 166     * range [0, 0x0D].
 167     */
 168    if ((idx < 0) || (idx > 0x0D)) {
 169       __glXSetError(gc, GL_INVALID_ENUM);
 170       return;
 171    }
 172
 173    if (stride < 0) {
 174       __glXSetError(gc, GL_INVALID_VALUE);
 175       return;
 176    }
 177
 178
 179    /* If the 'count' for a subarray is non-zero, then the offset of its
 180     * first element is at the currently accumulated 'size'.
 181     */
 182    size = 0;
 183    for (i = 0; i < 4; i++) {
 184       offsets[i] = (modes[idx][i].count != 0) ? size : -1;
 185       size += modes[idx][i].size;
 186    }
 187
 188    trueStride = (stride == 0) ? size : stride;
 189
 190    __glXArrayDisableAll(state);
 191
 192    if (offsets[0] >= 0) {
 193       __indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 194       __indirect_glTexCoordPointer(modes[idx][0].count, GL_FLOAT,
 195                                    trueStride, (const char *) pointer);
 196    }
 197    if (offsets[1] >= 0) {
 198       __indirect_glEnableClientState(GL_COLOR_ARRAY);
 199       __indirect_glColorPointer(modes[idx][1].count, modes[idx][1].type,
 200                                 trueStride,
 201                                 (const char *) pointer + offsets[1]);
 202    }
 203    if (offsets[2] >= 0) {
 204       __indirect_glEnableClientState(GL_NORMAL_ARRAY);
 205       __indirect_glNormalPointer(GL_FLOAT, trueStride,
 206                                  (const char *) pointer + offsets[2]);
 207    }
 208    __indirect_glEnableClientState(GL_VERTEX_ARRAY);
 209    __indirect_glVertexPointer(modes[idx][3].count, GL_FLOAT,
 210                               trueStride,
 211                               (const char *) pointer + offsets[3]);
 212 }