Mesa 4.0 for vxworks

/* ** 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. ** ** $Date: 2001/08/07 17:34:11 $ $Revision: 1.2 $ ** $Header: /cvsroot/mesa3d/Mesa/si-glu/libutil/mipmap.c,v 1.2 2001/08/07 17:34:11 brianp Exp $ */ #include "gluos.h" #include <assert.h> #include <GL/glu.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <limits.h> /* UINT_MAX */ #include <math.h> #include "gluint.h" typedef union { unsigned char ub[4]; unsigned short us[2]; unsigned int ui; char b[4]; short s[2]; int i; float f; } Type_Widget; /* Pixel storage modes */ typedef struct { GLint pack_alignment; GLint pack_row_length; GLint pack_skip_rows; GLint pack_skip_pixels; GLint pack_lsb_first; GLint pack_swap_bytes; GLint pack_skip_images; GLint pack_image_height; GLint unpack_alignment; GLint unpack_row_length; GLint unpack_skip_rows; GLint unpack_skip_pixels; GLint unpack_lsb_first; GLint unpack_swap_bytes; GLint unpack_skip_images; GLint unpack_image_height; } PixelStorageModes; static int gluBuild1DMipmapLevelsCore(GLenum, GLint, GLsizei, GLsizei, GLenum, GLenum, GLint, GLint, GLint, const void *); static int gluBuild2DMipmapLevelsCore(GLenum, GLint, GLsizei, GLsizei, GLsizei, GLsizei, GLenum, GLenum, GLint, GLint, GLint, const void *); static int gluBuild3DMipmapLevelsCore(GLenum, GLint, GLsizei, GLsizei, GLsizei, GLsizei, GLsizei, GLsizei, GLenum, GLenum, GLint, GLint, GLint, const void *); /* * internal function declarations */ static GLfloat bytes_per_element(GLenum type); static GLint elements_per_group(GLenum format, GLenum type); static GLint is_index(GLenum format); static GLint image_size(GLint width, GLint height, GLenum format, GLenum type); static void fill_image(const PixelStorageModes *, GLint width, GLint height, GLenum format, GLenum type, GLboolean index_format, const void *userdata, GLushort *newimage); static void empty_image(const PixelStorageModes *, GLint width, GLint height, GLenum format, GLenum type, GLboolean index_format, const GLushort *oldimage, void *userdata); static void scale_internal(GLint components, GLint widthin, GLint heightin, const GLushort *datain, GLint widthout, GLint heightout, GLushort *dataout); static void scale_internal_ubyte(GLint components, GLint widthin, GLint heightin, const GLubyte *datain, GLint widthout, GLint heightout, GLubyte *dataout, GLint element_size, GLint ysize, GLint group_size); static void scale_internal_byte(GLint components, GLint widthin, GLint heightin, const GLbyte *datain, GLint widthout, GLint heightout, GLbyte *dataout, GLint element_size, GLint ysize, GLint group_size); static void scale_internal_ushort(GLint components, GLint widthin, GLint heightin, const GLushort *datain, GLint widthout, GLint heightout, GLushort *dataout, GLint element_size, GLint ysize, GLint group_size, GLint myswap_bytes); static void scale_internal_short(GLint components, GLint widthin, GLint heightin, const GLshort *datain, GLint widthout, GLint heightout, GLshort *dataout, GLint element_size, GLint ysize, GLint group_size, GLint myswap_bytes); static void scale_internal_uint(GLint components, GLint widthin, GLint heightin, const GLuint *datain, GLint widthout, GLint heightout, GLuint *dataout, GLint element_size, GLint ysize, GLint group_size, GLint myswap_bytes); static void scale_internal_int(GLint components, GLint widthin, GLint heightin, const GLint *datain, GLint widthout, GLint heightout, GLint *dataout, GLint element_size, GLint ysize, GLint group_size, GLint myswap_bytes); static void scale_internal_float(GLint components, GLint widthin, GLint heightin, const GLfloat *datain, GLint widthout, GLint heightout, GLfloat *dataout, GLint element_size, GLint ysize, GLint group_size, GLint myswap_bytes); static int checkMipmapArgs(GLenum, GLenum, GLenum); static GLboolean legalFormat(GLenum); static GLboolean legalType(GLenum); static GLboolean isTypePackedPixel(GLenum); static GLboolean isLegalFormatForPackedPixelType(GLenum, GLenum); static GLboolean isLegalLevels(GLint, GLint, GLint, GLint); static void closestFit(GLenum, GLint, GLint, GLint, GLenum, GLenum, GLint *, GLint *); /* all extract/shove routines must return double to handle unsigned ints */ static GLdouble extractUbyte(int, const void *); static void shoveUbyte(GLdouble, int, void *); static GLdouble extractSbyte(int, const void *); static void shoveSbyte(GLdouble, int, void *); static GLdouble extractUshort(int, const void *); static void shoveUshort(GLdouble, int, void *); static GLdouble extractSshort(int, const void *); static void shoveSshort(GLdouble, int, void *); static GLdouble extractUint(int, const void *); static void shoveUint(GLdouble, int, void *); static GLdouble extractSint(int, const void *); static void shoveSint(GLdouble, int, void *); static GLdouble extractFloat(int, const void *); static void shoveFloat(GLdouble, int, void *); static void halveImageSlice(int, GLdouble (*)(int, const void *), void (*)(GLdouble, int, void *), GLint, GLint, GLint, const void *, void *, GLint, GLint, GLint, GLint, GLint); static void halveImage3D(int, GLdouble