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/* $XFree86: xc/lib/GL/glx/vertarr.c,v 1.4 2001/03/25 05:32:00 tsi Exp $ */
/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/
#include "glxclient.h"
#include "indirect.h"
#include "indirect_vertex_array.h"
/*****************************************************************************/
/**
* \name Vertex array pointer bridge functions
*
* When EXT_vertex_array was moved into the core GL spec, the \c count
* parameter was lost. This libGL really only wants to implement the GL 1.1
* version, but we need to support applications that were written to the old
* interface. These bridge functions are part of the glue that makes this
* happen.
*/
/*@{*/
void __indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
GLsizei count, const GLvoid * pointer )
{
(void) count; __indirect_glColorPointer( size, type, stride, pointer );
}
void __indirect_glEdgeFlagPointerEXT(GLsizei stride,
GLsizei count, const GLboolean * pointer )
{
(void) count; __indirect_glEdgeFlagPointer( stride, pointer );
}
void __indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
GLsizei count, const GLvoid * pointer )
{
(void) count; __indirect_glIndexPointer( type, stride, pointer );
}
void __indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
const GLvoid * pointer )
{
(void) count; __indirect_glNormalPointer( type, stride, pointer );
}
void __indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
GLsizei count, const GLvoid * pointer )
{
(void) count; __indirect_glTexCoordPointer( size, type, stride, pointer );
}
void __indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
GLsizei count, const GLvoid * pointer )
{
(void) count; __indirect_glVertexPointer( size, type, stride, pointer );
}
/*@}*/
/*****************************************************************************/
void __indirect_glInterleavedArrays(GLenum format, GLsizei stride, const GLvoid *pointer)
{
__GLXcontext *gc = __glXGetCurrentContext();
__GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
#define NONE {0, 0, 0}
#define F(x) {GL_FLOAT, x, x * sizeof(GLfloat)}
#define UB4 {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
/* Each row in this array describes the elements of a particular
* interleaved array mode. Each column describes, in the order in which
* they appear in the interleaved arrays, one of the four possible types
* of vertex data that can appear in an interleaved array.
*/
struct {
/**
* The enum describing the GL type, as would be passed to the
* appropriate gl*Pointer function.
*/
GLushort type;
/**
* Number of elements in the subarray, as would be passed (as the
* \c size parameter) to the appropriate gl*Pointer function.
*/
GLubyte count;
/**
* True size of a single element in the subarray, as would be passed
* (as the \c stride parameter) to the appropriate gl*Pointer
* function.
*/
GLubyte size;
}
static const modes[14][4] = {
/* texture color normal vertex */
{NONE, NONE, NONE, F(2)}, /* GL_V2F */
{NONE, NONE, NONE, F(3)}, /* GL_V3F */
{NONE, UB4, NONE, F(2)}, /* GL_C4UB_V2F */
{NONE, UB4, NONE, F(3)}, /* GL_C4UB_V3F */
{NONE, F(3), NONE, F(3)}, /* GL_C3F_V3F */
{NONE, NONE, F(3), F(3)}, /* GL_N3F_V3F */
{NONE, F(4), F(3), F(3)}, /* GL_C4F_N3F_V3F */
{F(2), NONE, NONE, F(3)}, /* GL_T2F_V3F */
{F(4), NONE, NONE, F(4)}, /* GL_T4F_V4F */
{F(2), UB4, NONE, F(3)}, /* GL_T2F_C4UB_V3F */
{F(2), F(3), NONE, F(3)}, /* GL_T2F_C3F_V3F */
{F(2), NONE, F(3), F(3)}, /* GL_T2F_N3F_V3F */
{F(2), F(4), F(3), F(3)}, /* GL_T2F_C4F_N3F_V3F */
{F(4), F(4), F(3), F(4)}, /* GL_T4F_C4F_N3F_V4F */
};
#undef NONE
#undef F
#undef UB4
GLint trueStride, size;
int offsets[4];
unsigned i;
const int idx = format - GL_V2F;
/* All valid formats are on the range [GL_V2F, GL_V2F+0x0D]. Since idx
* is just the format biased by -GL_V2F, all valid idx values are on the
* range [0, 0x0D].
*/
if ( (idx < 0) || (idx > 0x0D) ) {
__glXSetError(gc, GL_INVALID_ENUM);
return;
}
if ( stride < 0 ) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
/* If the 'count' for a subarray is non-zero, then the offset of its
* first element is at the currently accumulated 'size'.
*/
size = 0;
for ( i = 0 ; i < 4 ; i++ ) {
offsets[i] = (modes[idx][i].count != 0) ? size : -1;
size += modes[idx][i].size;
}
trueStride = (stride == 0) ? size : stride;
__glXArrayDisableAll( state );
if ( offsets[0] >= 0 ) {
__indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
__indirect_glTexCoordPointer( modes[idx][0].count, GL_FLOAT,
trueStride,
(const char *) pointer );
}
if ( offsets[1] >= 0 ) {
__indirect_glEnableClientState(GL_COLOR_ARRAY);
__indirect_glColorPointer( modes[idx][1].count, modes[idx][1].type,
trueStride,
(const char *) pointer + offsets[1] );
}
if ( offsets[2] >= 0 ) {
__indirect_glEnableClientState(GL_NORMAL_ARRAY);
__indirect_glNormalPointer( GL_FLOAT, trueStride,
(const char *)pointer + offsets[2] );
}
__indirect_glEnableClientState(GL_VERTEX_ARRAY);
__indirect_glVertexPointer( modes[idx][3].count, GL_FLOAT,
trueStride,
(const char *)pointer + offsets[3] );
}
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