vertarr.c revision 6e8897ff9f90601ebf6eed500ad942c11b54d1f7 
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/*@{*/
48void
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
56void
57__indirect_glEdgeFlagPointerEXT(GLsizei stride,
58                                GLsizei count, const GLboolean * pointer)
59{
60   (void) count;
61   __indirect_glEdgeFlagPointer(stride, pointer);
62}
63
64void
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
72void
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
80void
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
88void
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
100void
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}
213