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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] );
+}