src/glx/x11/compsize.c - fp2-dev/platform/external/mesa3d - Gitiles

 /* $XFree86: xc/lib/GL/glx/compsize.c,v 1.6 2004/01/28 18:11:38 alanh 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 <GL/gl.h>
 #include "glxclient.h"
 #include "size.h"

 /*
 ** Return the number of elements per group of a specified format
 */
 GLint __glElementsPerGroup(GLenum format, GLenum type)
 {
     /*
     ** To make row length computation valid for image extraction,
     ** packed pixel types assume elements per group equals one.
     */
     switch(type) {
     case GL_UNSIGNED_BYTE_3_3_2:
     case GL_UNSIGNED_BYTE_2_3_3_REV:
     case GL_UNSIGNED_SHORT_5_6_5:
     case GL_UNSIGNED_SHORT_5_6_5_REV:
     case GL_UNSIGNED_SHORT_4_4_4_4:
     case GL_UNSIGNED_SHORT_4_4_4_4_REV:
     case GL_UNSIGNED_SHORT_5_5_5_1:
     case GL_UNSIGNED_SHORT_1_5_5_5_REV:
     case GL_UNSIGNED_SHORT_8_8_APPLE:
     case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
     case GL_UNSIGNED_SHORT_15_1_MESA:
     case GL_UNSIGNED_SHORT_1_15_REV_MESA:
     case GL_UNSIGNED_INT_8_8_8_8:
     case GL_UNSIGNED_INT_8_8_8_8_REV:
     case GL_UNSIGNED_INT_10_10_10_2:
     case GL_UNSIGNED_INT_2_10_10_10_REV:
     case GL_UNSIGNED_INT_24_8_NV:
     case GL_UNSIGNED_INT_24_8_MESA:
     case GL_UNSIGNED_INT_8_24_REV_MESA:
       return 1;
     default:
       break;
     }

     switch(format) {
       case GL_RGB:
       case GL_BGR:
 	return 3;
       case GL_422_EXT:
       case GL_422_REV_EXT:
       case GL_422_AVERAGE_EXT:
       case GL_422_REV_AVERAGE_EXT:
       case GL_YCBCR_422_APPLE:
       case GL_LUMINANCE_ALPHA:
 	return 2;
       case GL_RGBA:
       case GL_BGRA:
       case GL_ABGR_EXT:
 	return 4;
       case GL_COLOR_INDEX:
       case GL_STENCIL_INDEX:
       case GL_DEPTH_COMPONENT:
       case GL_RED:
       case GL_GREEN:
       case GL_BLUE:
       case GL_ALPHA:
       case GL_LUMINANCE:
       case GL_INTENSITY:
 	return 1;
       default:
 	return 0;
     }
 }

 /*
 ** Return the number of bytes per element, based on the element type (other
 ** than GL_BITMAP).
 */
 GLint __glBytesPerElement(GLenum type)
 {
     switch(type) {
       case GL_UNSIGNED_SHORT:
       case GL_SHORT:
       case GL_UNSIGNED_SHORT_5_6_5:
       case GL_UNSIGNED_SHORT_5_6_5_REV:
       case GL_UNSIGNED_SHORT_4_4_4_4:
       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
       case GL_UNSIGNED_SHORT_5_5_5_1:
       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
       case GL_UNSIGNED_SHORT_8_8_APPLE:
       case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
       case GL_UNSIGNED_SHORT_15_1_MESA:
       case GL_UNSIGNED_SHORT_1_15_REV_MESA:
 	return 2;
       case GL_UNSIGNED_BYTE:
       case GL_BYTE:
       case GL_UNSIGNED_BYTE_3_3_2:
       case GL_UNSIGNED_BYTE_2_3_3_REV:
 	return 1;
       case GL_INT:
       case GL_UNSIGNED_INT:
       case GL_FLOAT:
       case GL_UNSIGNED_INT_8_8_8_8:
       case GL_UNSIGNED_INT_8_8_8_8_REV:
       case GL_UNSIGNED_INT_10_10_10_2:
       case GL_UNSIGNED_INT_2_10_10_10_REV:
       case GL_UNSIGNED_INT_24_8_NV:
       case GL_UNSIGNED_INT_24_8_MESA:
       case GL_UNSIGNED_INT_8_24_REV_MESA:
 	return 4;
       default:
 	return 0;
     }
 }

 /*
 ** Compute memory required for internal packed array of data of given type
 ** and format.
 */
 GLint __glImageSize(GLsizei width, GLsizei height, GLsizei depth,
 		    GLenum format, GLenum type)
 {
     int bytes_per_row;
     int components;

     if (width < 0 || height < 0 || depth < 0) {
 	return 0;
     }
     /*
     ** Zero is returned if either format or type are invalid.
     */
     components = __glElementsPerGroup(format,type);
     if (type == GL_BITMAP) {
 	if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
 	    bytes_per_row = (width + 7) >> 3;
 	} else {
 	    return 0;
 	}
     } else {
 	bytes_per_row = __glBytesPerElement(type) * width;
     }
     return bytes_per_row * height * depth * components;
 }

 GLint __glFogiv_size(GLenum pname)
 {
     switch (pname) {
       case GL_FOG_COLOR:	return 4;
       case GL_FOG_DENSITY:	return 1;
       case GL_FOG_END:		return 1;
       case GL_FOG_MODE:		return 1;
       case GL_FOG_INDEX:	return 1;
       case GL_FOG_START:	return 1;
       case GL_FOG_DISTANCE_MODE_NV: return 1;
       case GL_FOG_OFFSET_VALUE_SGIX: return 1;
       default:
 	return 0;
     }
 }

 GLint __glFogfv_size(GLenum pname)
 {
     return __glFogiv_size(pname);
 }

 GLint __glCallLists_size(GLsizei n, GLenum type)
 {
     GLint size;

     if (n < 0) return 0;
     switch (type) {
       case GL_BYTE:		size = 1; break;
       case GL_UNSIGNED_BYTE:	size = 1; break;
       case GL_SHORT:		size = 2; break;
       case GL_UNSIGNED_SHORT:	size = 2; break;
       case GL_INT:		size = 4; break;
       case GL_UNSIGNED_INT:	size = 4; break;
       case GL_FLOAT:		size = 4; break;
       case GL_2_BYTES:		size = 2; break;
       case GL_3_BYTES:		size = 3; break;
       case GL_4_BYTES:		size = 4; break;
       default:
 	return 0;
     }
     return n * size;
 }

 GLint __glDrawPixels_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
 {
     return __glImageSize( w, h, 1, format, type );
 }

 GLint __glBitmap_size(GLsizei w, GLsizei h)
 {
     return __glDrawPixels_size(GL_COLOR_INDEX, GL_BITMAP, w, h);
 }

 GLint __glTexGendv_size(GLenum e)
 {
     switch (e) {
       case GL_TEXTURE_GEN_MODE:
 	return 1;
       case GL_OBJECT_PLANE:
       case GL_EYE_PLANE:
 	return 4;
       default:
 	return 0;
     }
 }

 GLint __glTexGenfv_size(GLenum e)
 {
     return __glTexGendv_size(e);
 }

 GLint __glTexGeniv_size(GLenum e)
 {
     return __glTexGendv_size(e);
 }

 GLint __glTexParameterfv_size(GLenum e)
 {
     switch (e) {
       case GL_TEXTURE_WRAP_S:
       case GL_TEXTURE_WRAP_T:
       case GL_TEXTURE_WRAP_R:
       case GL_TEXTURE_MIN_FILTER:
       case GL_TEXTURE_MAG_FILTER:
       case GL_TEXTURE_PRIORITY:
       case GL_TEXTURE_RESIDENT:

       /* GL_SGIS_texture_lod / GL_EXT_texture_lod / GL 1.2 */
       case GL_TEXTURE_MIN_LOD:
       case GL_TEXTURE_MAX_LOD:
       case GL_TEXTURE_BASE_LEVEL:
       case GL_TEXTURE_MAX_LEVEL:

       /* GL_SGIX_texture_lod_bias */
       case GL_TEXTURE_LOD_BIAS_S_SGIX:
       case GL_TEXTURE_LOD_BIAS_T_SGIX:
       case GL_TEXTURE_LOD_BIAS_R_SGIX:

       /* GL_ARB_shadow / GL 1.4 */
       case GL_TEXTURE_COMPARE_MODE:
       case GL_TEXTURE_COMPARE_FUNC:

       /* GL_SGIS_generate_mipmap / GL 1.4 */
       case GL_GENERATE_MIPMAP:

       /* GL_ARB_depth_texture / GL 1.4 */
       case GL_DEPTH_TEXTURE_MODE:

       /* GL_EXT_texture_lod_bias / GL 1.4 */
       case GL_TEXTURE_LOD_BIAS:

       /* GL_SGIX_shadow_ambient / GL_ARB_shadow_ambient */
       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:

       /* GL_SGIX_shadow */
       case GL_TEXTURE_COMPARE_SGIX:
       case GL_TEXTURE_COMPARE_OPERATOR_SGIX:

       /* GL_SGIX_texture_coordinate_clamp */
       case GL_TEXTURE_MAX_CLAMP_S_SGIX:
       case GL_TEXTURE_MAX_CLAMP_T_SGIX:
       case GL_TEXTURE_MAX_CLAMP_R_SGIX:

       /* GL_EXT_texture_filter_anisotropic */
       case GL_TEXTURE_MAX_ANISOTROPY_EXT:

       /* GL_NV_texture_expand_normal */
       case GL_TEXTURE_UNSIGNED_REMAP_MODE_NV:
 	return 1;

       /* GL_SGIX_clipmap */
       case GL_TEXTURE_CLIPMAP_CENTER_SGIX:
       case GL_TEXTURE_CLIPMAP_OFFSET_SGIX:
 	return 2;

       /* GL_SGIX_clipmap */
       case GL_TEXTURE_CLIPMAP_VIRTUAL_DEPTH_SGIX:
 	return 3;

       case GL_TEXTURE_BORDER_COLOR:

       /* GL_SGIX_texture_scale_bias */
       case GL_POST_TEXTURE_FILTER_BIAS_SGIX:
       case GL_POST_TEXTURE_FILTER_SCALE_SGIX:
 	return 4;

       default:
 	return 0;
     }
 }

 GLint __glTexParameteriv_size(GLenum e)
 {
     return __glTexParameterfv_size(e);
 }

 GLint __glTexEnvfv_size(GLenum e)
 {
     switch (e) {
       case GL_TEXTURE_ENV_MODE:

       /* GL_ARB_texture_env_combine / GL_EXT_texture_env_combine / GL 1.3 */
       case GL_COMBINE_RGB:
       case GL_COMBINE_ALPHA:
       case GL_SOURCE0_RGB:
       case GL_SOURCE1_RGB:
       case GL_SOURCE2_RGB:
       case GL_SOURCE0_ALPHA:
       case GL_SOURCE1_ALPHA:
       case GL_SOURCE2_ALPHA:
       case GL_OPERAND0_RGB:
       case GL_OPERAND1_RGB:
       case GL_OPERAND0_ALPHA:
       case GL_OPERAND1_ALPHA:
       case GL_OPERAND2_RGB:
       case GL_OPERAND2_ALPHA:
       case GL_RGB_SCALE:
       case GL_ALPHA_SCALE:

       /* GL_EXT_texture_lod_bias / GL 1.4 */
       case GL_TEXTURE_LOD_BIAS:

       /* GL_ARB_point_sprite / GL_NV_point_sprite */
       case GL_COORD_REPLACE_ARB:

       /* GL_NV_texture_env_combine4 */
       case GL_SOURCE3_RGB_NV:
       case GL_SOURCE3_ALPHA_NV:
       case GL_OPERAND3_RGB_NV:
       case GL_OPERAND3_ALPHA_NV:
         return 1;

       case GL_TEXTURE_ENV_COLOR:
 	return 4;

       default:
 	return 0;
     }
 }

 GLint __glTexEnviv_size(GLenum e)
 {
     return __glTexEnvfv_size(e);
 }

 GLint __glTexImage1D_size(GLenum format, GLenum type, GLsizei w)
 {
     return __glImageSize( w, 1, 1, format, type );
 }

 GLint __glTexImage2D_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
 {
     return __glImageSize( w, h, 1, format, type );
 }

 GLint __glTexImage3D_size(GLenum format, GLenum type, GLsizei w, GLsizei h,
 			  GLsizei d)
 {
     return __glImageSize( w, h, d, format, type );
 }

 GLint __glLightfv_size(GLenum pname)
 {
     switch (pname) {
       case GL_SPOT_EXPONENT:		return 1;
       case GL_SPOT_CUTOFF:		return 1;
       case GL_AMBIENT:			return 4;
       case GL_DIFFUSE:			return 4;
       case GL_SPECULAR:			return 4;
       case GL_POSITION:			return 4;
       case GL_SPOT_DIRECTION:		return 3;
       case GL_CONSTANT_ATTENUATION:	return 1;
       case GL_LINEAR_ATTENUATION:	return 1;
       case GL_QUADRATIC_ATTENUATION:	return 1;
       default:
 	return 0;
     }
 }

 GLint __glLightiv_size(GLenum pname)
 {
     return __glLightfv_size(pname);
 }

 GLint __glLightModelfv_size(GLenum pname)
 {
     switch (pname) {
       case GL_LIGHT_MODEL_AMBIENT:		return 4;
       case GL_LIGHT_MODEL_LOCAL_VIEWER:		return 1;
       case GL_LIGHT_MODEL_TWO_SIDE:		return 1;
       case GL_LIGHT_MODEL_COLOR_CONTROL:	return 1;
       default:
 	return 0;
     }
 }

 GLint __glLightModeliv_size(GLenum pname)
 {
     return __glLightModelfv_size(pname);
 }

 GLint __glMaterialfv_size(GLenum pname)
 {
     switch (pname) {
       case GL_SHININESS:		return 1;
       case GL_EMISSION:			return 4;
       case GL_AMBIENT:			return 4;
       case GL_DIFFUSE:			return 4;
       case GL_SPECULAR:			return 4;
       case GL_AMBIENT_AND_DIFFUSE:	return 4;
       case GL_COLOR_INDEXES:		return 3;
       default:
 	return 0;
     }
 }

 GLint __glMaterialiv_size(GLenum pname)
 {
     return __glMaterialfv_size(pname);
 }

 GLint __glColorTableParameterfv_size(GLenum pname)
 {
     switch (pname) {
       case GL_COLOR_TABLE_FORMAT:
       case GL_COLOR_TABLE_WIDTH:
       case GL_COLOR_TABLE_RED_SIZE:
       case GL_COLOR_TABLE_GREEN_SIZE:
       case GL_COLOR_TABLE_BLUE_SIZE:
       case GL_COLOR_TABLE_ALPHA_SIZE:
       case GL_COLOR_TABLE_LUMINANCE_SIZE:
       case GL_COLOR_TABLE_INTENSITY_SIZE:
 	return 1;
       case GL_COLOR_TABLE_SCALE:
       case GL_COLOR_TABLE_BIAS:
 	return 4;
       default:
 	return -1;
     }
 }

 GLint __glColorTableParameteriv_size(GLenum pname)
 {
     return __glColorTableParameterfv_size(pname);
 }

 GLint __glConvolutionParameterfv_size(GLenum pname)
 {
     switch(pname) {
       case GL_CONVOLUTION_BORDER_MODE:
 	return 1;
       case GL_CONVOLUTION_BORDER_COLOR:
       case GL_CONVOLUTION_FILTER_SCALE:
       case GL_CONVOLUTION_FILTER_BIAS:
 	return 4;
       default: /* error: bad enum value */
 	return -1;
     }
 }

 GLint __glConvolutionParameteriv_size(GLenum pname)
 {
     return __glConvolutionParameterfv_size(pname);
 }

 GLint __glPointParameterfvARB_size(GLenum e)
 {
     switch (e) {
       case GL_POINT_SIZE_MIN:
       case GL_POINT_SIZE_MAX:
       case GL_POINT_FADE_THRESHOLD_SIZE:

       /* GL_NV_point_sprite */
       case GL_POINT_SPRITE_R_MODE_NV:
         return 1;

       case GL_POINT_DISTANCE_ATTENUATION:
 	return 3;

       default:
         return -1;
     }
 }

 GLint __glPointParameteriv_size(GLenum e)
 {
     return __glPointParameterfvARB_size(e);
 }
	/* $XFree86: xc/lib/GL/glx/compsize.c,v 1.6 2004/01/28 18:11:38 alanh 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 <GL/gl.h>
	#include "glxclient.h"
	#include "size.h"

	/*
	** Return the number of elements per group of a specified format
	*/
	GLint __glElementsPerGroup(GLenum format, GLenum type)
	{
	/*
	** To make row length computation valid for image extraction,
	** packed pixel types assume elements per group equals one.
	*/
	switch(type) {
	case GL_UNSIGNED_BYTE_3_3_2:
	case GL_UNSIGNED_BYTE_2_3_3_REV:
	case GL_UNSIGNED_SHORT_5_6_5:
	case GL_UNSIGNED_SHORT_5_6_5_REV:
	case GL_UNSIGNED_SHORT_4_4_4_4:
	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
	case GL_UNSIGNED_SHORT_5_5_5_1:
	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	case GL_UNSIGNED_SHORT_8_8_APPLE:
	case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
	case GL_UNSIGNED_SHORT_15_1_MESA:
	case GL_UNSIGNED_SHORT_1_15_REV_MESA:
	case GL_UNSIGNED_INT_8_8_8_8:
	case GL_UNSIGNED_INT_8_8_8_8_REV:
	case GL_UNSIGNED_INT_10_10_10_2:
	case GL_UNSIGNED_INT_2_10_10_10_REV:
	case GL_UNSIGNED_INT_24_8_NV:
	case GL_UNSIGNED_INT_24_8_MESA:
	case GL_UNSIGNED_INT_8_24_REV_MESA:
	return 1;
	default:
	break;
	}

	switch(format) {
	case GL_RGB:
	case GL_BGR:
	return 3;
	case GL_422_EXT:
	case GL_422_REV_EXT:
	case GL_422_AVERAGE_EXT:
	case GL_422_REV_AVERAGE_EXT:
	case GL_YCBCR_422_APPLE:
	case GL_LUMINANCE_ALPHA:
	return 2;
	case GL_RGBA:
	case GL_BGRA:
	case GL_ABGR_EXT:
	return 4;
	case GL_COLOR_INDEX:
	case GL_STENCIL_INDEX:
	case GL_DEPTH_COMPONENT:
	case GL_RED:
	case GL_GREEN:
	case GL_BLUE:
	case GL_ALPHA:
	case GL_LUMINANCE:
	case GL_INTENSITY:
	return 1;
	default:
	return 0;
	}
	}

	/*
	** Return the number of bytes per element, based on the element type (other
	** than GL_BITMAP).
	*/
	GLint __glBytesPerElement(GLenum type)
	{
	switch(type) {
	case GL_UNSIGNED_SHORT:
	case GL_SHORT:
	case GL_UNSIGNED_SHORT_5_6_5:
	case GL_UNSIGNED_SHORT_5_6_5_REV:
	case GL_UNSIGNED_SHORT_4_4_4_4:
	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
	case GL_UNSIGNED_SHORT_5_5_5_1:
	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	case GL_UNSIGNED_SHORT_8_8_APPLE:
	case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
	case GL_UNSIGNED_SHORT_15_1_MESA:
	case GL_UNSIGNED_SHORT_1_15_REV_MESA:
	return 2;
	case GL_UNSIGNED_BYTE:
	case GL_BYTE:
	case GL_UNSIGNED_BYTE_3_3_2:
	case GL_UNSIGNED_BYTE_2_3_3_REV:
	return 1;
	case GL_INT:
	case GL_UNSIGNED_INT:
	case GL_FLOAT:
	case GL_UNSIGNED_INT_8_8_8_8:
	case GL_UNSIGNED_INT_8_8_8_8_REV:
	case GL_UNSIGNED_INT_10_10_10_2:
	case GL_UNSIGNED_INT_2_10_10_10_REV:
	case GL_UNSIGNED_INT_24_8_NV:
	case GL_UNSIGNED_INT_24_8_MESA:
	case GL_UNSIGNED_INT_8_24_REV_MESA:
	return 4;
	default:
	return 0;
	}
	}

	/*
	** Compute memory required for internal packed array of data of given type
	** and format.
	*/
	GLint __glImageSize(GLsizei width, GLsizei height, GLsizei depth,
	GLenum format, GLenum type)
	{
	int bytes_per_row;
	int components;

	if (width < 0 \|\| height < 0 \|\| depth < 0) {
	return 0;
	}
	/*
	** Zero is returned if either format or type are invalid.
	*/
	components = __glElementsPerGroup(format,type);
	if (type == GL_BITMAP) {
	if (format == GL_COLOR_INDEX \|\| format == GL_STENCIL_INDEX) {
	bytes_per_row = (width + 7) >> 3;
	} else {
	return 0;
	}
	} else {
	bytes_per_row = __glBytesPerElement(type) * width;
	}
	return bytes_per_row * height * depth * components;
	}

	GLint __glFogiv_size(GLenum pname)
	{
	switch (pname) {
	case GL_FOG_COLOR: return 4;
	case GL_FOG_DENSITY: return 1;
	case GL_FOG_END: return 1;
	case GL_FOG_MODE: return 1;
	case GL_FOG_INDEX: return 1;
	case GL_FOG_START: return 1;
	case GL_FOG_DISTANCE_MODE_NV: return 1;
	case GL_FOG_OFFSET_VALUE_SGIX: return 1;
	default:
	return 0;
	}
	}

	GLint __glFogfv_size(GLenum pname)
	{
	return __glFogiv_size(pname);
	}

	GLint __glCallLists_size(GLsizei n, GLenum type)
	{
	GLint size;

	if (n < 0) return 0;
	switch (type) {
	case GL_BYTE: size = 1; break;
	case GL_UNSIGNED_BYTE: size = 1; break;
	case GL_SHORT: size = 2; break;
	case GL_UNSIGNED_SHORT: size = 2; break;
	case GL_INT: size = 4; break;
	case GL_UNSIGNED_INT: size = 4; break;
	case GL_FLOAT: size = 4; break;
	case GL_2_BYTES: size = 2; break;
	case GL_3_BYTES: size = 3; break;
	case GL_4_BYTES: size = 4; break;
	default:
	return 0;
	}
	return n * size;
	}

	GLint __glDrawPixels_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
	{
	return __glImageSize( w, h, 1, format, type );
	}

	GLint __glBitmap_size(GLsizei w, GLsizei h)
	{
	return __glDrawPixels_size(GL_COLOR_INDEX, GL_BITMAP, w, h);
	}

	GLint __glTexGendv_size(GLenum e)
	{
	switch (e) {
	case GL_TEXTURE_GEN_MODE:
	return 1;
	case GL_OBJECT_PLANE:
	case GL_EYE_PLANE:
	return 4;
	default:
	return 0;
	}
	}

	GLint __glTexGenfv_size(GLenum e)
	{
	return __glTexGendv_size(e);
	}

	GLint __glTexGeniv_size(GLenum e)
	{
	return __glTexGendv_size(e);
	}

	GLint __glTexParameterfv_size(GLenum e)
	{
	switch (e) {
	case GL_TEXTURE_WRAP_S:
	case GL_TEXTURE_WRAP_T:
	case GL_TEXTURE_WRAP_R:
	case GL_TEXTURE_MIN_FILTER:
	case GL_TEXTURE_MAG_FILTER:
	case GL_TEXTURE_PRIORITY:
	case GL_TEXTURE_RESIDENT:

	/* GL_SGIS_texture_lod / GL_EXT_texture_lod / GL 1.2 */
	case GL_TEXTURE_MIN_LOD:
	case GL_TEXTURE_MAX_LOD:
	case GL_TEXTURE_BASE_LEVEL:
	case GL_TEXTURE_MAX_LEVEL:

	/* GL_SGIX_texture_lod_bias */
	case GL_TEXTURE_LOD_BIAS_S_SGIX:
	case GL_TEXTURE_LOD_BIAS_T_SGIX:
	case GL_TEXTURE_LOD_BIAS_R_SGIX:

	/* GL_ARB_shadow / GL 1.4 */
	case GL_TEXTURE_COMPARE_MODE:
	case GL_TEXTURE_COMPARE_FUNC:

	/* GL_SGIS_generate_mipmap / GL 1.4 */
	case GL_GENERATE_MIPMAP:

	/* GL_ARB_depth_texture / GL 1.4 */
	case GL_DEPTH_TEXTURE_MODE:

	/* GL_EXT_texture_lod_bias / GL 1.4 */
	case GL_TEXTURE_LOD_BIAS:

	/* GL_SGIX_shadow_ambient / GL_ARB_shadow_ambient */
	case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:

	/* GL_SGIX_shadow */
	case GL_TEXTURE_COMPARE_SGIX:
	case GL_TEXTURE_COMPARE_OPERATOR_SGIX:

	/* GL_SGIX_texture_coordinate_clamp */
	case GL_TEXTURE_MAX_CLAMP_S_SGIX:
	case GL_TEXTURE_MAX_CLAMP_T_SGIX:
	case GL_TEXTURE_MAX_CLAMP_R_SGIX:

	/* GL_EXT_texture_filter_anisotropic */
	case GL_TEXTURE_MAX_ANISOTROPY_EXT:

	/* GL_NV_texture_expand_normal */
	case GL_TEXTURE_UNSIGNED_REMAP_MODE_NV:
	return 1;

	/* GL_SGIX_clipmap */
	case GL_TEXTURE_CLIPMAP_CENTER_SGIX:
	case GL_TEXTURE_CLIPMAP_OFFSET_SGIX:
	return 2;

	/* GL_SGIX_clipmap */
	case GL_TEXTURE_CLIPMAP_VIRTUAL_DEPTH_SGIX:
	return 3;

	case GL_TEXTURE_BORDER_COLOR:

	/* GL_SGIX_texture_scale_bias */
	case GL_POST_TEXTURE_FILTER_BIAS_SGIX:
	case GL_POST_TEXTURE_FILTER_SCALE_SGIX:
	return 4;

	default:
	return 0;
	}
	}

	GLint __glTexParameteriv_size(GLenum e)
	{
	return __glTexParameterfv_size(e);
	}

	GLint __glTexEnvfv_size(GLenum e)
	{
	switch (e) {
	case GL_TEXTURE_ENV_MODE:

	/* GL_ARB_texture_env_combine / GL_EXT_texture_env_combine / GL 1.3 */
	case GL_COMBINE_RGB:
	case GL_COMBINE_ALPHA:
	case GL_SOURCE0_RGB:
	case GL_SOURCE1_RGB:
	case GL_SOURCE2_RGB:
	case GL_SOURCE0_ALPHA:
	case GL_SOURCE1_ALPHA:
	case GL_SOURCE2_ALPHA:
	case GL_OPERAND0_RGB:
	case GL_OPERAND1_RGB:
	case GL_OPERAND0_ALPHA:
	case GL_OPERAND1_ALPHA:
	case GL_OPERAND2_RGB:
	case GL_OPERAND2_ALPHA:
	case GL_RGB_SCALE:
	case GL_ALPHA_SCALE:

	/* GL_EXT_texture_lod_bias / GL 1.4 */
	case GL_TEXTURE_LOD_BIAS:

	/* GL_ARB_point_sprite / GL_NV_point_sprite */
	case GL_COORD_REPLACE_ARB:

	/* GL_NV_texture_env_combine4 */
	case GL_SOURCE3_RGB_NV:
	case GL_SOURCE3_ALPHA_NV:
	case GL_OPERAND3_RGB_NV:
	case GL_OPERAND3_ALPHA_NV:
	return 1;

	case GL_TEXTURE_ENV_COLOR:
	return 4;

	default:
	return 0;
	}
	}

	GLint __glTexEnviv_size(GLenum e)
	{
	return __glTexEnvfv_size(e);
	}

	GLint __glTexImage1D_size(GLenum format, GLenum type, GLsizei w)
	{
	return __glImageSize( w, 1, 1, format, type );
	}

	GLint __glTexImage2D_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
	{
	return __glImageSize( w, h, 1, format, type );
	}

	GLint __glTexImage3D_size(GLenum format, GLenum type, GLsizei w, GLsizei h,
	GLsizei d)
	{
	return __glImageSize( w, h, d, format, type );
	}

	GLint __glLightfv_size(GLenum pname)
	{
	switch (pname) {
	case GL_SPOT_EXPONENT: return 1;
	case GL_SPOT_CUTOFF: return 1;
	case GL_AMBIENT: return 4;
	case GL_DIFFUSE: return 4;
	case GL_SPECULAR: return 4;
	case GL_POSITION: return 4;
	case GL_SPOT_DIRECTION: return 3;
	case GL_CONSTANT_ATTENUATION: return 1;
	case GL_LINEAR_ATTENUATION: return 1;
	case GL_QUADRATIC_ATTENUATION: return 1;
	default:
	return 0;
	}
	}

	GLint __glLightiv_size(GLenum pname)
	{
	return __glLightfv_size(pname);
	}

	GLint __glLightModelfv_size(GLenum pname)
	{
	switch (pname) {
	case GL_LIGHT_MODEL_AMBIENT: return 4;
	case GL_LIGHT_MODEL_LOCAL_VIEWER: return 1;
	case GL_LIGHT_MODEL_TWO_SIDE: return 1;
	case GL_LIGHT_MODEL_COLOR_CONTROL: return 1;
	default:
	return 0;
	}
	}

	GLint __glLightModeliv_size(GLenum pname)
	{
	return __glLightModelfv_size(pname);
	}

	GLint __glMaterialfv_size(GLenum pname)
	{
	switch (pname) {
	case GL_SHININESS: return 1;
	case GL_EMISSION: return 4;
	case GL_AMBIENT: return 4;
	case GL_DIFFUSE: return 4;
	case GL_SPECULAR: return 4;
	case GL_AMBIENT_AND_DIFFUSE: return 4;
	case GL_COLOR_INDEXES: return 3;
	default:
	return 0;
	}
	}

	GLint __glMaterialiv_size(GLenum pname)
	{
	return __glMaterialfv_size(pname);
	}

	GLint __glColorTableParameterfv_size(GLenum pname)
	{
	switch (pname) {
	case GL_COLOR_TABLE_FORMAT:
	case GL_COLOR_TABLE_WIDTH:
	case GL_COLOR_TABLE_RED_SIZE:
	case GL_COLOR_TABLE_GREEN_SIZE:
	case GL_COLOR_TABLE_BLUE_SIZE:
	case GL_COLOR_TABLE_ALPHA_SIZE:
	case GL_COLOR_TABLE_LUMINANCE_SIZE:
	case GL_COLOR_TABLE_INTENSITY_SIZE:
	return 1;
	case GL_COLOR_TABLE_SCALE:
	case GL_COLOR_TABLE_BIAS:
	return 4;
	default:
	return -1;
	}
	}

	GLint __glColorTableParameteriv_size(GLenum pname)
	{
	return __glColorTableParameterfv_size(pname);
	}

	GLint __glConvolutionParameterfv_size(GLenum pname)
	{
	switch(pname) {
	case GL_CONVOLUTION_BORDER_MODE:
	return 1;
	case GL_CONVOLUTION_BORDER_COLOR:
	case GL_CONVOLUTION_FILTER_SCALE:
	case GL_CONVOLUTION_FILTER_BIAS:
	return 4;
	default: /* error: bad enum value */
	return -1;
	}
	}

	GLint __glConvolutionParameteriv_size(GLenum pname)
	{
	return __glConvolutionParameterfv_size(pname);
	}

	GLint __glPointParameterfvARB_size(GLenum e)
	{
	switch (e) {
	case GL_POINT_SIZE_MIN:
	case GL_POINT_SIZE_MAX:
	case GL_POINT_FADE_THRESHOLD_SIZE:

	/* GL_NV_point_sprite */
	case GL_POINT_SPRITE_R_MODE_NV:
	return 1;

	case GL_POINT_DISTANCE_ATTENUATION:
	return 3;

	default:
	return -1;
	}
	}

	GLint __glPointParameteriv_size(GLenum e)
	{
	return __glPointParameterfvARB_size(e);
	}