www.pudn.com > fatmap2.zip > MISC.H

 
/* 
 *      Misc declarations 
 * 
 *      This source is part of the fatmap2.txt document by 
 *      Mats Byggmastar, mri@penti.sit.fi 
 *      17.4.1997 Jakobstad, Finland 
 * 
 *      Companies with self respect are encouraged to contact me if 
 *      any of this code is to be used as part of a commercial product. 
 */ 
 
 
#ifndef _MISC_H 
#define _MISC_H 
 
/* 
 * 
 *      Declarations for mappers 
 * 
 */ 
 
extern char * WritePagePtr; 
extern int    WritePageWidth; 
 
struct vertex 
{ 
    long x,y;       // Screen position in 16:16 bit fixed point 
}; 
 
struct vertexi 
{ 
    long x,y;       // Screen position in 16:16 bit fixed point 
    long i;         // Color intensity in 16:16 bit fixed point 
}; 
 
struct vertexuv 
{ 
    long x,y;       // Screen position in 16:16 bit fixed point 
    long u,v;       // Texture u,v in 16:16 bit fixed point 
}; 
 
extern void DrawFlatPoly(vertex * vtx, int vertices, int color); 
extern void DrawGouraudPoly(vertexi * vtx, int vertices, long didx); 
extern void DrawTexturePoly(vertexuv * vtx, int vertices, 
                            char * bitmap, long dudx, long dvdx); 
extern void DrawArbitraryTexturePoly(vertexuv * vtx, int vertices, 
                                     char * bitmap, int bitmapwidth, 
                                     long dudx, long dvdx); 
extern void DrawTiledTexturePoly(vertexuv * vtx, int vertices, 
                                 char * bitmap, long dudx, long dvdx); 
 
 
inline long ceil(long x) 
{ 
    x +=  0xffff; 
    return (x >> 16); 
} 
 
 
long imul16(long x, long y);        // (x * y) >> 16 
#pragma aux imul16 = \ 
    " imul  edx        "\ 
    " shrd  eax,edx,16 "\ 
    parm [eax] [edx] value [eax] 
 
 
long imul14(long x, long y);        // (x * y) >> 14 
#pragma aux imul14 = \ 
    " imul  edx        "\ 
    " shrd  eax,edx,14 "\ 
    parm [eax] [edx] value [eax] 
 
 
long idiv16(long x, long y);        // (x << 16) / y 
#pragma aux idiv16 = \ 
    " mov   edx,eax    "\ 
    " sar   edx,16     "\ 
    " shl   eax,16     "\ 
    " idiv  ebx        "\ 
    parm [eax] [ebx] modify exact [eax edx] value [eax] 
 
 
 
/* 
 * 
 *      Declarations for 2d clipper 
 * 
 */ 
 
extern float TopClip; 
extern float BotClip; 
extern float LeftClip; 
extern float RightClip; 
 
#define VISIBLE     0 
#define TOP         1 
#define BOT         2 
#define LEFT        4 
#define RIGHT       8 
 
struct vertexclip 
{ 
    float x,y; 
    float u,v; 
    int visible; 
}; 
 
extern int ClipUV(vertexclip *** final, vertexclip * vbp); 
 
 
 
/* 
 * 
 *      Declarations for drawing functions 
 * 
 */ 
 
struct vertexuvfloat 
{ 
    float x,y; 
    float u,v; 
    int visible; 
}; 
 
extern void DrawFlatTriangle(vertexuvfloat * vtx, int color); 
extern void DrawGouraudTriangle(vertexuvfloat * vtx); 
extern void DrawTextureTriangle(vertexuvfloat * vtx, char * bitmap); 
extern void DrawTiledTextureTriangle(vertexuvfloat * vtx, char * bitmap); 
extern void DrawArbitraryTextureTriangle(vertexuvfloat * vtx, char * bitmap, 
                                         int bitmapwidth); 
 
 
#endif