src/glx/vertarr.c - platform/external/mesa3d - Git at Google

 /*
  * 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"

 #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
	/*
	* 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"

	#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