Erik Hofman
6451e505d8
All FlighGear specific patches applied to ShivaVG are also applied to ShaderVG, if appropriate. For testing only for now, it is not yet fully functional.
190 lines
5.1 KiB
C
190 lines
5.1 KiB
C
/*
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* Copyright (c) 2007 Ivan Leben
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __SHDEFS_H
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#define __SHDEFS_H
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/* Standard headers */
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#include "shConfig.h"
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#ifdef VG_API_WINDOWS
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# include <windows.h>
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#endif
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#include <stdlib.h>
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#include <assert.h>
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#include <math.h>
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#include <float.h>
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#if !defined(VG_API_MACOSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
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# include <malloc.h>
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#endif
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/* Disable VGHandle-pointer conversion warnings since we
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do deal with it by defining VGHandle properly */
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#if defined(_MSC_VER)
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# pragma warning(disable:4311)
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# pragma warning(disable:4312)
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#endif
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/* Type definitions */
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#if HAVE_INTTYPES_H
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#include <inttypes.h>
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#else
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#define int8_t char
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#define uint8_t unsigned char
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#define int16_t short
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#define uint16_t unsigned short
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#define int32_t int
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#define uint32_t unsigned int
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#define int64_t long long
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#define uint64_t unsigned long long
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#endif
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typedef int8_t SHint8;
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typedef uint8_t SHuint8;
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typedef int16_t SHint16;
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typedef uint16_t SHuint16;
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typedef int32_t SHint32;
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typedef uint32_t SHuint32;
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typedef float SHfloat32;
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#define SHint SHint32
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#define SHuint SHuint32
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#define SHfloat SHfloat32
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/* Maximum / minimum values */
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#define SH_MAX_INT (0x7fffffff)
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#define SH_MIN_INT (-0x7fffffff-1)
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#define SH_MANTISSA_BITS 23
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#define SH_EXPONENT_BITS 8
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/* all 1s in exponent yields NaN in IEEE 754 so we take
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1 less then maximum representable with exponent bits */
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#define SH_MAX_EXPONENT ((1 << SH_EXPONENT_BITS) - 2)
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/* maximum representable with mantissa bits */
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#define SH_MAX_MANTISSA ((1 << SH_MANTISSA_BITS) - 1)
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/* compose into IEEE754 floating point bit value */
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#define SH_MAX_FLOAT_BITS (SH_MAX_EXPONENT << SH_MANTISSA_BITS) | SH_MAX_MANTISSA
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typedef union {
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float f;
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unsigned int i;
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} SHfloatint;
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SHfloat getMaxFloat();
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/* Portable function definitions */
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#define SH_SQRT (float)sqrt
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#define SH_COS (float)cos
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#define SH_SIN (float)sin
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#define SH_ACOS (float)acos
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#define SH_ASIN (float)asin
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#define SH_ATAN (float)atan
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#define SH_FLOOR (float)floor
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#define SH_CEIL (float)ceil
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#define SH_ASSERT assert
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#if defined(__isnan) || (defined(__APPLE__) && (__GNUC__ == 3))
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# define SH_ISNAN __isnan
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#elif defined(_isnan) || defined(WIN32)
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# define SH_ISNAN _isnan
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#else
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# define SH_ISNAN isnan
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#endif
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/* Helper macros */
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#define PI 3.141592654f
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#define SH_DEG2RAD(a) (a * PI / 180.0f)
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#define SH_RAD2DEG(a) (a * 180.0f / PI)
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#define SH_ABS(a) ((a < 0.0f) ? -a : a)
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#define SH_MAX(a,b) ((a > b) ? a : b)
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#define SH_MIN(a,b) ((a < b) ? a : b)
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#define SH_NEARZERO(a) (a >= -0.0001 && a < 0.0001)
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#define SH_SWAP(a,b) {SHfloat t=a; a=b; b=t;}
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#define SH_CLAMP(a,min,max) {if (a<min) a=min; if (a>max) a=max; }
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#define SH_NEWOBJ(type,obj) { obj = (type*)malloc(sizeof(type)); if(obj) type ## _ctor(obj); }
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#define SH_INITOBJ(type,obj){ type ## _ctor(&obj); }
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#define SH_DEINITOBJ(type,obj) { type ## _dtor(&obj); }
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#define SH_DELETEOBJ(type,obj) { if(obj) type ## _dtor(obj); free(obj); }
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/* Implementation limits */
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#define SH_MAX_SCISSOR_RECTS 1
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#define SH_MAX_DASH_COUNT VG_MAXINT
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#define SH_MAX_IMAGE_WIDTH VG_MAXINT
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#define SH_MAX_IMAGE_HEIGHT VG_MAXINT
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#define SH_MAX_IMAGE_PIXELS VG_MAXINT
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#define SH_MAX_IMAGE_BYTES VG_MAXINT
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#define SH_MAX_COLOR_RAMP_STOPS 256
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#define SH_MAX_VERTICES 999999999
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#define SH_MAX_RECURSE_DEPTH 16
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#define SH_GRADIENT_TEX_WIDTH 1024
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#define SH_GRADIENT_TEX_HEIGHT 1
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#define SH_GRADIENT_TEX_COORDSIZE 4096 /* 1024 * RGBA */
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/* OpenGL headers */
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#if defined(VG_API_LINUX) || defined(VG_API_FREEBSD) || defined(VG_API_OPENBSD)
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#include <GL/gl.h>
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#include <GL/glx.h>
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#elif defined(VG_API_MACOSX)
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#include <OpenGL/gl.h>
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#elif defined(VG_API_WINDOWS)
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#include <GL/gl.h>
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#else
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#define GL_GLEXT_LEGACY /* don't include glext.h */
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#include <GL/gl.h>
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#include <GL/glx.h>
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#endif
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#include "shExtensions.h"
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#define GL_GET_ERROR printf("glGetError() -> %d line:%d file:%s\r\n", glGetError(), __LINE__, __FILE__)
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#define GL_CEHCK_ERROR \
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{ \
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GLint err = glGetError(); \
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if(err){\
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printf("glGetError() -> %d \r\n", err);\
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assert(0);\
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}\
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}
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// GL_TEXTURE0 :imageSampler
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// GL_TEXTURE1 :rampSampler or patternSampler
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// GL_TEXTURE2 :User defined
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#define SH_TEXTURE_USER_TOP GL_TEXTURE2
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#endif /* __SHDEFS_H */
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