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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
__indirect_glColorPointerEXT(GLint size,GLenum type,GLsizei stride,GLsizei count,const GLvoid * pointer)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
__indirect_glEdgeFlagPointerEXT(GLsizei stride,GLsizei count,const GLboolean * pointer)58 __indirect_glEdgeFlagPointerEXT(GLsizei stride,
59                                 GLsizei count, const GLboolean * pointer)
60 {
61    (void) count;
62    __indirect_glEdgeFlagPointer(stride, pointer);
63 }
64 
65 void
__indirect_glIndexPointerEXT(GLenum type,GLsizei stride,GLsizei count,const GLvoid * pointer)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
__indirect_glNormalPointerEXT(GLenum type,GLsizei stride,GLsizei count,const GLvoid * pointer)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
__indirect_glTexCoordPointerEXT(GLint size,GLenum type,GLsizei stride,GLsizei count,const GLvoid * pointer)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
__indirect_glVertexPointerEXT(GLint size,GLenum type,GLsizei stride,GLsizei count,const GLvoid * pointer)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
__indirect_glInterleavedArrays(GLenum format,GLsizei stride,const GLvoid * pointer)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
216