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/*
* SDL Graphics Extension
* SGE internal header
*
* Started 000627
*
* License: LGPL v2+ (see the file LICENSE)
* (c)2000-2003 Anders Lindstrm
*/
/*********************************************************************
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
*********************************************************************/
#ifndef sge_internal_H
#define sge_internal_H
/* This header is included in all sge_*.h files */
#include "sge_config.h"
/*
* C compatibility
* Thanks to Ohbayashi Ippei (ohai@kmc.gr.jp) for this clever hack!
*/
#ifdef _SGE_C_AND_CPP
#ifdef __cplusplus
#define _SGE_C /* use extern "C" on base functions */
#else
#define sge_C_ONLY /* remove overloaded functions */
#define _SGE_NO_CLASSES /* no C++ classes */
#endif
#endif
/*
* This is traditional
*/
#ifndef PI
#define PI 3.1414926535
#endif
/*
* Bit flags
*/
#define SGE_FLAG0 0x00
#define SGE_FLAG1 0x01
#define SGE_FLAG2 0x02
#define SGE_FLAG3 0x04
#define SGE_FLAG4 0x08
#define SGE_FLAG5 0x10
#define SGE_FLAG6 0x20
#define SGE_FLAG7 0x40
#define SGE_FLAG8 0x80
/*
* Define the right alpha values
* (they were fliped in SDL 1.1.5+)
*/
#ifndef SDL_ALPHA_OPAQUE
#define SDL_ALPHA_OPAQUE 0
#endif
#ifndef SDL_ALPHA_TRANSPARENT
#define SDL_ALPHA_TRANSPARENT 255
#endif
/*
* Older versions of SDL doesn't have SDL_VERSIONNUM
*/
#ifndef SDL_VERSIONNUM
#define SDL_VERSIONNUM(X, Y, Z) \
(X)*1000 + (Y)*100 + (Z)
#endif
/*
* Older versions of SDL doesn't have SDL_CreateRGBSurface
*/
#ifndef SDL_AllocSurface
#define SDL_CreateRGBSurface SDL_AllocSurface
#endif
/*
* Macro to get clipping
*/
#if SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL) >= \
SDL_VERSIONNUM(1, 1, 5)
#define sge_clip_xmin(pnt) pnt->clip_rect.x
#define sge_clip_xmax(pnt) pnt->clip_rect.x + pnt->clip_rect.w-1
#define sge_clip_ymin(pnt) pnt->clip_rect.y
#define sge_clip_ymax(pnt) pnt->clip_rect.y + pnt->clip_rect.h-1
#else
#define sge_clip_xmin(pnt) pnt->clip_minx
#define sge_clip_xmax(pnt) pnt->clip_maxx
#define sge_clip_ymin(pnt) pnt->clip_miny
#define sge_clip_ymax(pnt) pnt->clip_maxy
#endif
/*
* Macro to get the smallest bounding box from two (SDL_Rect) rectangles
*/
#define sge_RectUnion(dst_rect, rect1, rect2)\
dst_rect.x = (rect1.x < rect2.x)? rect1.x:rect2.x;\
dst_rect.y = (rect1.y < rect2.y)? rect1.y:rect2.y;\
dst_rect.w = (rect1.x + rect1.w > rect2.x + rect2.w)? rect1.x + rect1.w - dst_rect.x : rect2.x + rect2.w - dst_rect.x;\
dst_rect.h = (rect1.y + rect1.h > rect2.y + rect2.h)? rect1.y + rect1.h - dst_rect.y : rect2.y + rect2.h - dst_rect.y;
/*
* We need to use alpha sometimes but older versions of SDL doesn't have
* alpha support.
*/
#if SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL) >= \
SDL_VERSIONNUM(1, 1, 5)
#define sge_MapRGBA SDL_MapRGBA
#define sge_GetRGBA SDL_GetRGBA
#else
#define sge_MapRGBA(fmt, r, g, b, a) SDL_MapRGB(fmt, r, g, b)
#define sge_GetRGBA(pixel, fmt, r, g, b, a) SDL_GetRGBA(pixel, fmt, r, g, b)
#endif
/*
* Some compilers use a special export keyword
* Thanks to Seung Chan Lim (limsc@maya.com or slim@djslim.com) to pointing this out
* (From SDL)
*/
#ifndef DECLSPEC
#ifdef __BEOS__
#if defined(__GNUC__)
#define DECLSPEC __declspec(dllexport)
#else
#define DECLSPEC __declspec(export)
#endif
#else
#ifdef WIN32
#define DECLSPEC __declspec(dllexport)
#else
#define DECLSPEC
#endif
#endif
#endif
#endif /* sge_internal_H */
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