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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.
*
* SPDX-License-Identifier: SGI-B-2.0
*/
#include "glxclient.h"
#include "indirect.h"
#include "indirect_vertex_array.h"
#ifndef GLX_USE_APPLEGL
/*****************************************************************************/
/**
* \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)
{
struct glx_context *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]);
}
#endif
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