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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)

{

   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]);

}