Leaked source code of windows server 2003
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#ifndef __glglobal_h_
#define __glglobal_h_
/*
** Copyright 1991, 1992, 1993, Silicon Graphics, Inc.** All Rights Reserved.**** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;** the contents of this file may not be disclosed to third parties, copied or** duplicated in any form, in whole or in part, without the prior written** permission of Silicon Graphics, Inc.**** RESTRICTED RIGHTS LEGEND:** Use, duplication or disclosure by the Government is subject to restrictions** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data** and Computer Software clause at DFARS 252.227-7013, and/or in similar or** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -** rights reserved under the Copyright Laws of the United States.*/#include "context.h"
/*
** Some misc constants*/#ifdef NT
// These constants can either be static memory constants or
// real constants. This #if should be modified for each
// platform to optimize the constant type for the platform
// For example, the x86 FPU can only load from memory so having
// these constants as memory locations rather than values is
// a clear win
#if defined(_X86_) || defined(_ALPHA_) || defined(_MIPS_) || defined(_PPC_)
extern const double __glDoubleTwo;extern const double __glDoubleMinusTwo;
#ifdef _ALPHA_
// On Alpha, register f31 always reads as zero.
#define __glZero ((__GLfloat) 0.0)
#else
extern const __GLfloat __glZero;#endif
extern const __GLfloat __glOne;extern const __GLfloat __glMinusOne;extern const __GLfloat __glHalf;extern const __GLfloat __glDegreesToRadians;extern const __GLfloat __glPi;extern const __GLfloat __glSqrt2;extern const __GLfloat __glE;extern const __GLfloat __glVal128;extern const __GLfloat __glVal255;extern const __GLfloat __glOneOver255;extern const __GLfloat __glVal256;extern const __GLfloat __glOneOver512;extern const __GLfloat __glVal768;extern const __GLfloat __glVal65535;extern const __GLfloat __glVal65536;extern const __GLfloat __glOneOver65535;extern const __GLfloat __glTexSubDiv;extern const __GLfloat __glVal2147483648;/*
** Not quite 2^31-1 because of possible floating point errors. 4294965000** is a much safer number to use.*/extern const __GLfloat __glVal4294965000;extern const __GLfloat __glOneOver4294965000;
#else // Real values
#define __glDoubleTwo ((double) 2.0)
#define __glDoubleMinusTwo ((double) -2.0)
#define __glZero ((__GLfloat) 0.0)
#define __glOne ((__GLfloat) 1.0)
#define __glMinusOne ((__GLfloat) -1.0)
#define __glHalf ((__GLfloat) 0.5)
#define __glDegreesToRadians (__glPi / (__GLfloat) 180.0)
#define __glPi ((__GLfloat) 3.14159265358979323846)
#define __glSqrt2 ((__GLfloat) 1.41421356237309504880)
#define __glE ((__GLfloat) 2.7182818284590452354)
#define __glVal128 ((__GLfloat) 128.0)
#define __glVal255 ((__GLfloat) 255.0)
#define __glOneOver255 ((__GLfloat) (1.0 / 255.0))
#define __glVal256 ((__GLfloat) 256.0)
#define __glOneOver512 ((__GLfloat) (1.0 / 512.0))
#define __glVal768 ((__GLfloat) 768.0)
#define __glVal65535 ((__GLfloat) 65535.0)
#define __glVal65536 ((__GLfloat) 65536.0)
#define __glOneOver65535 ((__GLfloat) (1.0 / 65535.0))
#define __glVal2147483648 ((__GLfloat) 2147483648.0)
/*
** Not quite 2^31-1 because of possible floating point errors. 4294965000** is a much safer number to use.*/#define __glVal4294965000 ((__GLfloat) (4294965000.0))
#define __glOneOver4294965000 ((__GLfloat) (1.0 / 4294965000.0))
#endif // Real values
#else
#define __glZero ((__GLfloat) 0.0)
#define __glOne (gc->constants.one)
#define __glMinusOne ((__GLfloat) -1.0)
#define __glHalf (gc->constants.half)
#define __glTwo ((__GLfloat) 2.0)
#define __glDegreesToRadians (__glPi / (__GLfloat) 180.0)
#define __glPi ((__GLfloat) 3.14159265358979323846)
#define __glSqrt2 ((__GLfloat) 1.41421356237309504880)
#define __glE ((__GLfloat) 2.7182818284590452354)
#define __glVal255 ((__GLfloat) 255.0)
#define __glOneOver255 ((__GLfloat) (1.0 / 255.0))
#define __glVal65535 ((__GLfloat) 65535.0)
#define __glOneOver65535 ((__GLfloat) (1.0 / 65535.0))
/*
** Not quite 2^31-1 because of possible floating point errors. 4294965000** is a much safer number to use.*/#define __glVal4294965000 ((__GLfloat) (4294965000.0))
#define __glOneOver4294965000 ((__GLfloat) (1.0 / 4294965000.0))
#endif // NT
// This is used by the macro __GL_UB_TO_FLOAT which converts
// unsigned bytes to floats in the range [0,1].
extern GLfloat __glUByteToFloat[256];
// This is used by the macro __GL_B_TO_FLOAT for byte to float component
// conversion.
extern GLfloat __glByteToFloat[256];
// This is used by frustum clipping to determine which plane coordinate
// to use
extern GLuint __glFrustumOffsets[];
/************************************************************************/
#define __GL_SETUP() \
__GLcontext *gc = GLTEB_SRVCONTEXT()
#define __GL_IN_BEGIN() \
(gc->beginMode == __GL_IN_BEGIN)
#define __GL_SETUP_NOT_IN_BEGIN() \
__GL_SETUP(); \ if (__GL_IN_BEGIN()) { \ __glSetError(GL_INVALID_OPERATION); \ return; \ }
#define __GL_SETUP_NOT_IN_BEGIN_VALIDATE() \
__GL_SETUP(); \ __GLbeginMode beginMode = gc->beginMode; \ if (beginMode != __GL_NOT_IN_BEGIN) { \ if (beginMode == __GL_NEED_VALIDATE) { \ (*gc->procs.validate)(gc); \ gc->beginMode = __GL_NOT_IN_BEGIN; \ } else { \ __glSetError(GL_INVALID_OPERATION); \ return; \ } \ }
#define __GL_SETUP_NOT_IN_BEGIN2() \
__GL_SETUP(); \ if (__GL_IN_BEGIN()) { \ __glSetError(GL_INVALID_OPERATION); \ return 0; \ }
#endif /* __glglobal_h_ */
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