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 #ifndef GLX_USE_APPLEGL
  36
  37 /*****************************************************************************/
  38
  39 /**
  40  * \name Vertex array pointer bridge functions
  41  *
  42  * When EXT_vertex_array was moved into the core GL spec, the \c count
  43  * parameter was lost.  This libGL really only wants to implement the GL 1.1
  44  * version, but we need to support applications that were written to the old
  45  * interface.  These bridge functions are part of the glue that makes this
  46  * happen.
  47  */
  48 /*@{*/
  49 void
  50 __indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
  51                              GLsizei count, const GLvoid * pointer)
  52 {
  53    (void) count;
  54    __indirect_glColorPointer(size, type, stride, pointer);
  55 }
  56
  57 void
  58 __indirect_glEdgeFlagPointerEXT(GLsizei stride,
  59                                 GLsizei count, const GLboolean * pointer)
  60 {
  61    (void) count;
  62    __indirect_glEdgeFlagPointer(stride, pointer);
  63 }
  64
  65 void
  66 __indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
  67                              GLsizei count, const GLvoid * pointer)
  68 {
  69    (void) count;
  70    __indirect_glIndexPointer(type, stride, pointer);
  71 }
  72
  73 void
  74 __indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
  75                               const GLvoid * pointer)
  76 {
  77    (void) count;
  78    __indirect_glNormalPointer(type, stride, pointer);
  79 }
  80
  81 void
  82 __indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
  83                                 GLsizei count, const GLvoid * pointer)
  84 {
  85    (void) count;
  86    __indirect_glTexCoordPointer(size, type, stride, pointer);
  87 }
  88
  89 void
  90 __indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
  91                               GLsizei count, const GLvoid * pointer)
  92 {
  93    (void) count;
  94    __indirect_glVertexPointer(size, type, stride, pointer);
  95 }
  96
  97 /*@}*/
  98
  99 /*****************************************************************************/
 100
 101 void
 102 __indirect_glInterleavedArrays(GLenum format, GLsizei stride,
 103                                const GLvoid * pointer)
 104 {
 105    struct glx_context *gc = __glXGetCurrentContext();
 106    __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
 107
 108 #define NONE  {0, 0, 0}
 109 #define F(x)  {GL_FLOAT, x, x * sizeof(GLfloat)}
 110 #define UB4   {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
 111
 112    /* Each row in this array describes the elements of a particular
 113     * interleaved array mode.  Each column describes, in the order in which
 114     * they appear in the interleaved arrays, one of the four possible types
 115     * of vertex data that can appear in an interleaved array.
 116     */
 117    struct
 118    {
 119         /**
 120          * The enum describing the GL type, as would be passed to the
 121          * appropriate gl*Pointer function.
 122          */
 123       GLushort type;
 124
 125         /**
 126          * Number of elements in the subarray, as would be passed (as the
 127          * \c size parameter) to the appropriate gl*Pointer function.
 128          */
 129       GLubyte count;
 130
 131         /**
 132          * True size of a single element in the subarray, as would be passed
 133          * (as the \c stride parameter) to the appropriate gl*Pointer
 134          * function.
 135          */
 136       GLubyte size;
 137    }
 138    static const modes[14][4] = {
 139       /* texture color normal vertex */
 140       {NONE, NONE, NONE, F(2)}, /* GL_V2F */
 141       {NONE, NONE, NONE, F(3)}, /* GL_V3F */
 142       {NONE, UB4, NONE, F(2)},  /* GL_C4UB_V2F */
 143       {NONE, UB4, NONE, F(3)},  /* GL_C4UB_V3F */
 144       {NONE, F(3), NONE, F(3)}, /* GL_C3F_V3F */
 145       {NONE, NONE, F(3), F(3)}, /* GL_N3F_V3F */
 146       {NONE, F(4), F(3), F(3)}, /* GL_C4F_N3F_V3F */
 147       {F(2), NONE, NONE, F(3)}, /* GL_T2F_V3F */
 148       {F(4), NONE, NONE, F(4)}, /* GL_T4F_V4F */
 149       {F(2), UB4, NONE, F(3)},  /* GL_T2F_C4UB_V3F */
 150       {F(2), F(3), NONE, F(3)}, /* GL_T2F_C3F_V3F */
 151       {F(2), NONE, F(3), F(3)}, /* GL_T2F_N3F_V3F */
 152       {F(2), F(4), F(3), F(3)}, /* GL_T2F_C4F_N3F_V3F */
 153       {F(4), F(4), F(3), F(4)}, /* GL_T4F_C4F_N3F_V4F */
 154    };
 155 #undef NONE
 156 #undef F
 157 #undef UB4
 158
 159    GLint trueStride, size;
 160    int offsets[4];
 161    unsigned i;
 162    const int idx = format - GL_V2F;
 163
 164
 165    /* All valid formats are on the range [GL_V2F, GL_V2F+0x0D].  Since idx
 166     * is just the format biased by -GL_V2F, all valid idx values are on the
 167     * range [0, 0x0D].
 168     */
 169    if ((idx < 0) || (idx > 0x0D)) {
 170       __glXSetError(gc, GL_INVALID_ENUM);
 171       return;
 172    }
 173
 174    if (stride < 0) {
 175       __glXSetError(gc, GL_INVALID_VALUE);
 176       return;
 177    }
 178
 179
 180    /* If the 'count' for a subarray is non-zero, then the offset of its
 181     * first element is at the currently accumulated 'size'.
 182     */
 183    size = 0;
 184    for (i = 0; i < 4; i++) {
 185       offsets[i] = (modes[idx][i].count != 0) ? size : -1;
 186       size += modes[idx][i].size;
 187    }
 188
 189    trueStride = (stride == 0) ? size : stride;
 190
 191    __glXArrayDisableAll(state);
 192
 193    if (offsets[0] >= 0) {
 194       __indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 195       __indirect_glTexCoordPointer(modes[idx][0].count, GL_FLOAT,
 196                                    trueStride, (const char *) pointer);
 197    }
 198    if (offsets[1] >= 0) {
 199       __indirect_glEnableClientState(GL_COLOR_ARRAY);
 200       __indirect_glColorPointer(modes[idx][1].count, modes[idx][1].type,
 201                                 trueStride,
 202                                 (const char *) pointer + offsets[1]);
 203    }
 204    if (offsets[2] >= 0) {
 205       __indirect_glEnableClientState(GL_NORMAL_ARRAY);
 206       __indirect_glNormalPointer(GL_FLOAT, trueStride,
 207                                  (const char *) pointer + offsets[2]);
 208    }
 209    __indirect_glEnableClientState(GL_VERTEX_ARRAY);
 210    __indirect_glVertexPointer(modes[idx][3].count, GL_FLOAT,
 211                               trueStride,
 212                               (const char *) pointer + offsets[3]);
 213 }
 214
 215 #endif