mirror of
https://github.com/reactos/reactos.git
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645 lines
16 KiB
C
645 lines
16 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.5
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file imports.h
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* Standard C library function wrappers.
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*
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* This file provides wrappers for all the standard C library functions
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* like malloc(), free(), printf(), getenv(), etc.
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*/
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#ifndef IMPORTS_H
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#define IMPORTS_H
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#include "compiler.h"
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#include "glheader.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**********************************************************************/
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/** Memory macros */
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/*@{*/
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/** Allocate \p BYTES bytes */
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#define MALLOC(BYTES) malloc(BYTES)
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/** Allocate and zero \p BYTES bytes */
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#define CALLOC(BYTES) calloc(1, BYTES)
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/** Allocate a structure of type \p T */
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#define MALLOC_STRUCT(T) (struct T *) malloc(sizeof(struct T))
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/** Allocate and zero a structure of type \p T */
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#define CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
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/** Free memory */
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#define FREE(PTR) free(PTR)
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/*@}*/
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/*
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* For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
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* as offsets into buffer stores. Since the vertex array pointer and
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* buffer store pointer are both pointers and we need to add them, we use
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* this macro.
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* Both pointers/offsets are expressed in bytes.
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*/
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#define ADD_POINTERS(A, B) ( (GLubyte *) (A) + (uintptr_t) (B) )
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/**
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* Sometimes we treat GLfloats as GLints. On x86 systems, moving a float
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* as a int (thereby using integer registers instead of FP registers) is
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* a performance win. Typically, this can be done with ordinary casts.
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* But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
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* these casts generate warnings.
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* The following union typedef is used to solve that.
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*/
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typedef union { GLfloat f; GLint i; } fi_type;
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/**********************************************************************
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* Math macros
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*/
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#define MAX_GLUSHORT 0xffff
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#define MAX_GLUINT 0xffffffff
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/* Degrees to radians conversion: */
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#define DEG2RAD (M_PI/180.0)
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/***
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*** SQRTF: single-precision square root
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***/
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#if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
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# define SQRTF(X) _mesa_sqrtf(X)
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#else
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# define SQRTF(X) (float) sqrt((float) (X))
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#endif
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/***
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*** INV_SQRTF: single-precision inverse square root
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***/
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#if 0
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#define INV_SQRTF(X) _mesa_inv_sqrt(X)
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#else
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#define INV_SQRTF(X) (1.0F / SQRTF(X)) /* this is faster on a P4 */
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#endif
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/**
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* \name Work-arounds for platforms that lack C99 math functions
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*/
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/*@{*/
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#if (!defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE < 600)) && !defined(_ISOC99_SOURCE) \
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&& (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)) \
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&& (!defined(_MSC_VER) || (_MSC_VER < 1400))
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#define acosf(f) ((float) acos(f))
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#define asinf(f) ((float) asin(f))
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#define atan2f(x,y) ((float) atan2(x,y))
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#define atanf(f) ((float) atan(f))
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#define cielf(f) ((float) ciel(f))
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#define cosf(f) ((float) cos(f))
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#define coshf(f) ((float) cosh(f))
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#define expf(f) ((float) exp(f))
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#define exp2f(f) ((float) exp2(f))
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#define floorf(f) ((float) floor(f))
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#define logf(f) ((float) log(f))
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#ifdef ANDROID
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#define log2f(f) (logf(f) * (float) (1.0 / M_LN2))
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#else
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#define log2f(f) ((float) log2(f))
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#endif
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#define powf(x,y) ((float) pow(x,y))
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#define sinf(f) ((float) sin(f))
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#define sinhf(f) ((float) sinh(f))
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#define sqrtf(f) ((float) sqrt(f))
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#define tanf(f) ((float) tan(f))
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#define tanhf(f) ((float) tanh(f))
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#define acoshf(f) ((float) acosh(f))
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#define asinhf(f) ((float) asinh(f))
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#define atanhf(f) ((float) atanh(f))
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#endif
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#if defined(_MSC_VER)
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static inline float truncf(float x) { return x < 0.0f ? ceilf(x) : floorf(x); }
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static inline float exp2f(float x) { return powf(2.0f, x); }
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static inline float log2f(float x) { return logf(x) * 1.442695041f; }
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static inline float asinhf(float x) { return logf(x + sqrtf(x * x + 1.0f)); }
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static inline float acoshf(float x) { return logf(x + sqrtf(x * x - 1.0f)); }
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static inline float atanhf(float x) { return (logf(1.0f + x) - logf(1.0f - x)) / 2.0f; }
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static inline int isblank(int ch) { return ch == ' ' || ch == '\t'; }
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#define strtoll(p, e, b) _strtoi64(p, e, b)
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#endif
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/*@}*/
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/***
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*** LOG2: Log base 2 of float
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***/
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#ifdef USE_IEEE
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#if 0
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/* This is pretty fast, but not accurate enough (only 2 fractional bits).
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* Based on code from http://www.stereopsis.com/log2.html
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*/
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static inline GLfloat LOG2(GLfloat x)
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{
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const GLfloat y = x * x * x * x;
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const GLuint ix = *((GLuint *) &y);
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const GLuint exp = (ix >> 23) & 0xFF;
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const GLint log2 = ((GLint) exp) - 127;
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return (GLfloat) log2 * (1.0 / 4.0); /* 4, because of x^4 above */
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}
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#endif
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/* Pretty fast, and accurate.
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* Based on code from http://www.flipcode.com/totd/
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*/
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static inline GLfloat LOG2(GLfloat val)
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{
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fi_type num;
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GLint log_2;
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num.f = val;
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log_2 = ((num.i >> 23) & 255) - 128;
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num.i &= ~(255 << 23);
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num.i += 127 << 23;
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num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
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return num.f + log_2;
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}
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#else
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/*
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* NOTE: log_base_2(x) = log(x) / log(2)
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* NOTE: 1.442695 = 1/log(2).
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*/
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#define LOG2(x) ((GLfloat) (log(x) * 1.442695F))
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#endif
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/***
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*** IS_INF_OR_NAN: test if float is infinite or NaN
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***/
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#ifdef USE_IEEE
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static inline int IS_INF_OR_NAN( float x )
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{
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fi_type tmp;
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tmp.f = x;
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return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
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}
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#elif defined(isfinite)
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#define IS_INF_OR_NAN(x) (!isfinite(x))
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#elif defined(finite)
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#define IS_INF_OR_NAN(x) (!finite(x))
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#elif defined(__VMS)
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#define IS_INF_OR_NAN(x) (!finite(x))
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#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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#define IS_INF_OR_NAN(x) (!isfinite(x))
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#else
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#define IS_INF_OR_NAN(x) (!finite(x))
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#endif
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/***
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*** IS_NEGATIVE: test if float is negative
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***/
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#if defined(USE_IEEE)
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static inline int GET_FLOAT_BITS( float x )
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{
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fi_type fi;
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fi.f = x;
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return fi.i;
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}
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#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
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#else
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#define IS_NEGATIVE(x) (x < 0.0F)
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#endif
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/***
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*** DIFFERENT_SIGNS: test if two floats have opposite signs
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***/
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#if defined(USE_IEEE)
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#define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
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#else
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/* Could just use (x*y<0) except for the flatshading requirements.
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* Maybe there's a better way?
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*/
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#define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
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#endif
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/***
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*** CEILF: ceiling of float
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*** FLOORF: floor of float
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*** FABSF: absolute value of float
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*** LOGF: the natural logarithm (base e) of the value
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*** EXPF: raise e to the value
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*** LDEXPF: multiply value by an integral power of two
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*** FREXPF: extract mantissa and exponent from value
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***/
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#if defined(__gnu_linux__)
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/* C99 functions */
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#define CEILF(x) ceilf(x)
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#define FLOORF(x) floorf(x)
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#define FABSF(x) fabsf(x)
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#define LOGF(x) logf(x)
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#define EXPF(x) expf(x)
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#define LDEXPF(x,y) ldexpf(x,y)
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#define FREXPF(x,y) frexpf(x,y)
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#else
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#define CEILF(x) ((GLfloat) ceil(x))
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#define FLOORF(x) ((GLfloat) floor(x))
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#define FABSF(x) ((GLfloat) fabs(x))
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#define LOGF(x) ((GLfloat) log(x))
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#define EXPF(x) ((GLfloat) exp(x))
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#define LDEXPF(x,y) ((GLfloat) ldexp(x,y))
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#define FREXPF(x,y) ((GLfloat) frexp(x,y))
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#endif
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/***
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*** IROUND: return (as an integer) float rounded to nearest integer
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***/
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#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
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static inline int iround(float f)
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{
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int r;
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__asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
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return r;
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}
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#define IROUND(x) iround(x)
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#elif defined(USE_X86_ASM) && defined(_MSC_VER)
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static inline int iround(float f)
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{
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int r;
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_asm {
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fld f
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fistp r
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}
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return r;
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}
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#define IROUND(x) iround(x)
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#elif defined(__WATCOMC__) && defined(__386__)
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long iround(float f);
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#pragma aux iround = \
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"push eax" \
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"fistp dword ptr [esp]" \
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"pop eax" \
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parm [8087] \
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value [eax] \
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modify exact [eax];
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#define IROUND(x) iround(x)
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#else
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#define IROUND(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
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#endif
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#define IROUND64(f) ((GLint64) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
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/***
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*** IROUND_POS: return (as an integer) positive float rounded to nearest int
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***/
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#ifdef DEBUG
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#define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
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#else
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#define IROUND_POS(f) (IROUND(f))
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#endif
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/***
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*** IFLOOR: return (as an integer) floor of float
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***/
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#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
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/*
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* IEEE floor for computers that round to nearest or even.
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* 'f' must be between -4194304 and 4194303.
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* This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
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* but uses some IEEE specific tricks for better speed.
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* Contributed by Josh Vanderhoof
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*/
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static inline int ifloor(float f)
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{
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int ai, bi;
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double af, bf;
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af = (3 << 22) + 0.5 + (double)f;
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bf = (3 << 22) + 0.5 - (double)f;
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/* GCC generates an extra fstp/fld without this. */
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__asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
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__asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
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return (ai - bi) >> 1;
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}
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#define IFLOOR(x) ifloor(x)
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#elif defined(USE_IEEE)
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static inline int ifloor(float f)
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{
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int ai, bi;
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double af, bf;
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fi_type u;
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af = (3 << 22) + 0.5 + (double)f;
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bf = (3 << 22) + 0.5 - (double)f;
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u.f = (float) af; ai = u.i;
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u.f = (float) bf; bi = u.i;
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return (ai - bi) >> 1;
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}
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#define IFLOOR(x) ifloor(x)
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#else
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static inline int ifloor(float f)
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{
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int i = IROUND(f);
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return (i > f) ? i - 1 : i;
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}
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#define IFLOOR(x) ifloor(x)
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#endif
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/***
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*** ICEIL: return (as an integer) ceiling of float
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***/
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#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
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/*
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* IEEE ceil for computers that round to nearest or even.
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* 'f' must be between -4194304 and 4194303.
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* This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
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* but uses some IEEE specific tricks for better speed.
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* Contributed by Josh Vanderhoof
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*/
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static inline int iceil(float f)
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{
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int ai, bi;
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double af, bf;
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af = (3 << 22) + 0.5 + (double)f;
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bf = (3 << 22) + 0.5 - (double)f;
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/* GCC generates an extra fstp/fld without this. */
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__asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
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__asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
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return (ai - bi + 1) >> 1;
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}
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#define ICEIL(x) iceil(x)
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#elif defined(USE_IEEE)
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static inline int iceil(float f)
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{
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int ai, bi;
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double af, bf;
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fi_type u;
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af = (3 << 22) + 0.5 + (double)f;
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bf = (3 << 22) + 0.5 - (double)f;
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u.f = (float) af; ai = u.i;
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u.f = (float) bf; bi = u.i;
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return (ai - bi + 1) >> 1;
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}
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#define ICEIL(x) iceil(x)
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#else
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static inline int iceil(float f)
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{
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int i = IROUND(f);
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return (i < f) ? i + 1 : i;
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}
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#define ICEIL(x) iceil(x)
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#endif
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/**
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* Is x a power of two?
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*/
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static inline int
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_mesa_is_pow_two(int x)
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{
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return !(x & (x - 1));
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}
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/**
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* Round given integer to next higer power of two
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* If X is zero result is undefined.
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*
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* Source for the fallback implementation is
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* Sean Eron Anderson's webpage "Bit Twiddling Hacks"
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* http://graphics.stanford.edu/~seander/bithacks.html
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*
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* When using builtin function have to do some work
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* for case when passed values 1 to prevent hiting
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* undefined result from __builtin_clz. Undefined
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* results would be different depending on optimization
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* level used for build.
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*/
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static inline int32_t
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_mesa_next_pow_two_32(uint32_t x)
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{
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#if defined(__GNUC__) && \
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((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) /* gcc 3.4 or later */
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uint32_t y = (x != 1);
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return (1 + y) << ((__builtin_clz(x - y) ^ 31) );
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#else
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x--;
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x |= x >> 1;
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x |= x >> 2;
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x |= x >> 4;
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x |= x >> 8;
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x |= x >> 16;
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x++;
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return x;
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#endif
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}
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static inline int64_t
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_mesa_next_pow_two_64(uint64_t x)
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{
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#if defined(__GNUC__) && \
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((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) /* gcc 3.4 or later */
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uint64_t y = (x != 1);
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if (sizeof(x) == sizeof(long))
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return (1 + y) << ((__builtin_clzl(x - y) ^ 63));
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else
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return (1 + y) << ((__builtin_clzll(x - y) ^ 63));
|
|
#else
|
|
x--;
|
|
x |= x >> 1;
|
|
x |= x >> 2;
|
|
x |= x >> 4;
|
|
x |= x >> 8;
|
|
x |= x >> 16;
|
|
x |= x >> 32;
|
|
x++;
|
|
return x;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns the floor form of binary logarithm for a 32-bit integer.
|
|
*/
|
|
static inline GLuint
|
|
_mesa_logbase2(GLuint n)
|
|
{
|
|
#if defined(__GNUC__) && \
|
|
((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) /* gcc 3.4 or later */
|
|
return (31 - __builtin_clz(n | 1));
|
|
#else
|
|
GLuint pos = 0;
|
|
if (n >= 1<<16) { n >>= 16; pos += 16; }
|
|
if (n >= 1<< 8) { n >>= 8; pos += 8; }
|
|
if (n >= 1<< 4) { n >>= 4; pos += 4; }
|
|
if (n >= 1<< 2) { n >>= 2; pos += 2; }
|
|
if (n >= 1<< 1) { pos += 1; }
|
|
return pos;
|
|
#endif
|
|
}
|
|
|
|
|
|
/**
|
|
* Return 1 if this is a little endian machine, 0 if big endian.
|
|
*/
|
|
static inline GLboolean
|
|
_mesa_little_endian(void)
|
|
{
|
|
const GLuint ui = 1; /* intentionally not static */
|
|
return *((const GLubyte *) &ui);
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* Functions
|
|
*/
|
|
|
|
extern void *
|
|
_mesa_align_malloc( size_t bytes, unsigned long alignment );
|
|
|
|
extern void *
|
|
_mesa_align_calloc( size_t bytes, unsigned long alignment );
|
|
|
|
extern void
|
|
_mesa_align_free( void *ptr );
|
|
|
|
extern void *
|
|
_mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
|
|
unsigned long alignment);
|
|
|
|
extern void *
|
|
_mesa_exec_malloc( GLuint size );
|
|
|
|
extern void
|
|
_mesa_exec_free( void *addr );
|
|
|
|
extern void *
|
|
_mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
|
|
|
|
extern void
|
|
_mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
|
|
|
|
extern double
|
|
_mesa_sqrtd(double x);
|
|
|
|
extern float
|
|
_mesa_sqrtf(float x);
|
|
|
|
extern float
|
|
_mesa_inv_sqrtf(float x);
|
|
|
|
extern void
|
|
_mesa_init_sqrt_table(void);
|
|
|
|
#ifdef __GNUC__
|
|
|
|
#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(ANDROID) || defined(__APPLE__)
|
|
#define ffs __builtin_ffs
|
|
#define ffsll __builtin_ffsll
|
|
#endif
|
|
|
|
#define _mesa_ffs(i) ffs(i)
|
|
#define _mesa_ffsll(i) ffsll(i)
|
|
|
|
#if ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) /* gcc 3.4 or later */
|
|
#define _mesa_bitcount(i) __builtin_popcount(i)
|
|
#define _mesa_bitcount_64(i) __builtin_popcountll(i)
|
|
#else
|
|
extern unsigned int
|
|
_mesa_bitcount(unsigned int n);
|
|
extern unsigned int
|
|
_mesa_bitcount_64(uint64_t n);
|
|
#endif
|
|
|
|
#else
|
|
extern int
|
|
_mesa_ffs(int32_t i);
|
|
|
|
extern int
|
|
_mesa_ffsll(int64_t i);
|
|
|
|
extern unsigned int
|
|
_mesa_bitcount(unsigned int n);
|
|
#endif
|
|
|
|
|
|
extern void *
|
|
_mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size,
|
|
int (*compar)(const void *, const void *) );
|
|
|
|
extern char *
|
|
_mesa_getenv( const char *var );
|
|
|
|
extern char *
|
|
_mesa_strdup( const char *s );
|
|
|
|
extern float
|
|
_mesa_strtof( const char *s, char **end );
|
|
|
|
extern unsigned int
|
|
_mesa_str_checksum(const char *str);
|
|
|
|
extern int
|
|
_mesa_snprintf( char *str, size_t size, const char *fmt, ... ) PRINTFLIKE(3, 4);
|
|
|
|
struct gl_context;
|
|
|
|
extern void
|
|
_mesa_warning( struct gl_context *gc, const char *fmtString, ... ) PRINTFLIKE(2, 3);
|
|
|
|
extern void
|
|
_mesa_problem( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);
|
|
|
|
extern void
|
|
_mesa_error( struct gl_context *ctx, GLenum error, const char *fmtString, ... ) PRINTFLIKE(3, 4);
|
|
|
|
extern void
|
|
_mesa_debug( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);
|
|
|
|
|
|
#if defined(_MSC_VER) && !defined(snprintf)
|
|
#define snprintf _snprintf
|
|
#endif
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif /* IMPORTS_H */
|