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/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#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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