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added DrawGeometry.h

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HuYingzhuo(hugo/hyzboy) 2023-07-11 18:16:23 +08:00
parent 20cae9a462
commit ca74184d39
1 changed files with 409 additions and 0 deletions
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inc/hgl/2d/DrawGeometry.h Normal file
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#pragma once
#include<hgl/2d/Bitmap.h>
#include<hgl/math/FastTriangle.h>
namespace hgl
{
template<typename T> class DrawGeometry
{
public:
using FormatBitmap=Bitmap<T>;
protected:
FormatBitmap *bitmap;
T draw_color;
public:
DrawGeometry(FormatBitmap *fb)
{
bitmap=fb;
}
virtual ~DrawGeometry()=default;
virtual void SetDrawColor(const T &color)
{
draw_color=color;
}
bool GetPixel(int x,int y,T &color)
{
if(!data)return(false);
T *p=GetData(x,y);
if(!p)return(false);
color=*p;
return(true);
}
bool PutPixel(int x,int y)
{
if(!bitmap)return(false);
T *p=bitmap->GetData(x,y);
if(!p)return(false);
*p=draw_color;
return(true);
}
bool DrawHLine(int x,int y,int length)
{
if(!bitmap)return(false);
const int width=bitmap->GetWidth();
const int height=bitmap->GetHeight();
if(y<0||y>=height)return(false);
if(x>=width)return(false);
if(x<0){length+=x;x=0;}
if(x+length>width)length=width-x;
if(length<=0)return(false);
FillPixels<T>(bitmap->GetData(x,y),draw_color,length);
return(true);
}
bool DrawBar(int l,int t,int w,int h)
{
if(!bitmap)return(false);
const int width=bitmap->GetWidth();
const int height=bitmap->GetHeight();
if(l>=width||t>=height)return(false);
if(l<0){w+=l;l=0;}
if(t<0){h+=t;t=0;}
if(l+w>width)w=width-l;
if(t+h>height)h=height-t;
if(w<=0||h<=0)return(false);
for(int y=t;y<t+h;y++)
FillPixels<T>(bitmap->GetData(l,y),draw_color,w);
return(true);
}
bool DrawVLine(int x,int y,int length)
{
if(!bitmap)return(false);
const int width=bitmap->GetWidth();
const int height=bitmap->GetHeight();
if(x<0||x>=width)return(false);
if(y>=height)return(false);
if(y<0){length+=y;y=0;}
if(y+length>height)length=height-y;
if(length<=0)return(false);
const uint line_bytes=bitmap->GetLineBytes();
T *p=bitmap->GetData(x,y);
for(int i=0;i<length;i++)
{
*p=draw_color;
p+=line_bytes;
}
return(true);
}
bool DrawWireCircle(int x0,int y0,int radius)
{
if(!bitmap)return(false);
if(radius<=0)return(false);
int tn;
int x,y;
int xmax;
y=radius;
x=0;
xmax=int(radius*HGL_SIN_45);
tn=(1-radius*2);
while(x<=xmax)
{
if(tn>=0)
{
tn+=(6+((x-y)<<2));
y--;
}
else
tn+=((x<<2)+2);
PutPixel(x0+y,y0+x);
PutPixel(x0+x,y0+y);
PutPixel(x0-x,y0+y);
PutPixel(x0-y,y0+x);
PutPixel(x0-y,y0-x);
PutPixel(x0-x,y0-y);
PutPixel(x0+x,y0-y);
PutPixel(x0+y,y0-x);
x++;
}
PutPixel(x0+y,y0+x);
PutPixel(x0+x,y0+y);
PutPixel(x0-x,y0+y);
PutPixel(x0-y,y0+x);
PutPixel(x0-y,y0-x);
PutPixel(x0-x,y0-y);
PutPixel(x0+x,y0-y);
PutPixel(x0+y,y0-x);
return(true);
}
bool DrawSolidCircle(int x,int y,int radius)
{
if(!bitmap)return(false);
if(radius<=0)return(false);
int x0=x-radius;
int y0=y-radius;
int x1=x+radius;
int y1=y+radius;
const int width=bitmap->GetWidth();
const int height=bitmap->GetHeight();
if(x0<0)x0=0;
if(y0<0)y0=0;
if(x1>=width)x1=width-1;
if(y1>=height)y1=height-1;
if(x0>x1||y0>y1)return(false);
int r2=radius*radius;
for(int cy=y0;cy<=y1;cy++)
{
int dy=cy-y;
int dy2=dy*dy;
for(int cx=x0;cx<=x1;cx++)
{
int dx=cx-x;
int dx2=dx*dx;
if(dx2+dy2<=r2)
PutPixel(cx,cy);
}
}
return(true);
}
void DrawLine(int x1, int y1, int x2, int y2)
{
int p, n, x, y, tn;
if(y1==y2)
{
if(x1>x2)
{
x=x2;x2=x1;x1=x;
}
DrawHLine(x1, y1, x2-x1+1);
return;
}
if(x1==x2)
{
if(y1>y2)
{
y=y2;y2=y1;y1=y;
}
DrawVLine(x1, y1, y2-y1+1);
return;
}
if(abs(y2-y1)<=abs(x2-x1))
{
if((y2<y1&&x2<x1)||(y1<=y2&&x1>x2))
{
x=x2;y=y2;x2=x1;y2=y1;x1=x;y1=y;
}
if(y2>=y1&&x2>=x1)
{
x=x2-x1;y=y2-y1;
p=2*y;n=2*x-2*y;tn=x;
while(x1<=x2)
{
if(tn>=0)tn-=p;
else { tn+=n;y1++; }
PutPixel(x1++, y1);
}
}
else
{
x=x2-x1;y=y2-y1;
p=-2*y;n=2*x+2*y;tn=x;
while(x1<=x2)
{
if(tn>=0)tn-=p;
else { tn+=n;y1--; }
PutPixel(x1++, y1);
}
}
}
else
{
x=x1;x1=y2;y2=x;y=y1;y1=x2;x2=y;
if((y2<y1&&x2<x1)||(y1<=y2&&x1>x2))
{
x=x2;y=y2;x2=x1;y2=y1;x1=x;y1=y;
}
if(y2>=y1&&x2>=x1)
{
x=x2-x1;y=y2-y1;p=2*y;n=2*x-2*y;tn=x;
while(x1<=x2)
{
if(tn>=0)tn-=p;
else { tn+=n;y1++; }
PutPixel(y1, x1++);
}
}
else
{
x=x2-x1;y=y2-y1;p=-2*y;n=2*x+2*y;tn=x;
while(x1<=x2)
{
if(tn>=0)tn-=p;
else { tn+=n;y1--; }
PutPixel(y1, x1++);
}
}
}
}
void DrawSector(int x0, int y0, uint r, uint stangle, uint endangle)
{
int i, j;
int *xy;
int bx, ex, bxd, exd, bxf, exf, ben;
int tn, x, y;
int xmax;
y=r; x=0;
xmax=(int)(r*HGL_SIN_45);
tn=(1-r*2);
xy=(int *)calloc(20, sizeof(int));
xy[0]=x0+r;xy[1]=y0;
xy[2]=x0; xy[3]=y0-r;
xy[4]=x0; xy[5]=y0-r;
xy[6]=x0-r;xy[7]=y0;
xy[8]=x0-r;xy[9]=y0;
xy[10]=x0; xy[11]=y0+r;
xy[12]=x0; xy[13]=y0+r;
xy[14]=x0+r;xy[15]=y0;
bx=stangle/45;
ex=endangle/45;
ben=ex-bx-1;
xy[16]=(int)(r*Lcos(stangle));
xy[17]=(int)(r*Lsin(stangle));
xy[18]=(int)(r*Lcos(endangle));
xy[19]=(int)(r*Lsin(endangle));
DrawLine(x0+xy[16], y0-xy[17], x0, y0);
DrawLine(x0+xy[18], y0-xy[19], x0, y0);
if(bx==1||bx==2||bx==5||bx==6)bxd=abs(xy[16]);else bxd=abs(xy[17]);
if(ex==1||ex==2||ex==5||ex==6)exd=abs(xy[18]);else exd=abs(xy[19]);
if(bx==0||bx==2||bx==4||bx==6)bxf=0; else bxf=1;
if(ex==0||ex==2||ex==4||ex==6)exf=1; else exf=0;
while(x<=xmax)
{
if(tn>=0)
{
tn+=(6+((x-y)*4));
y--;
xy[0]--;
xy[3]++;
xy[5]++;
xy[6]++;
xy[8]++;
xy[11]--;
xy[13]--;
xy[14]--;
}
else tn+=((x*4)+2);
if(stangle<endangle)
{
j=(bx+1)*2;
for(i=0;i<ben;i++)
{
PutPixel(xy[j], xy[j+1]);
j+=2;
}
}
else if(stangle>endangle)
{
j=(bx+1)*2;
for(i=bx+1;i<8;i++)
{
PutPixel(xy[j], xy[j+1]);
j+=2;
}
j=0;
for(i=0;i<ex;i++)
{
PutPixel(xy[j], xy[j+1]);
j+=2;
}
}
i=bx*2;
if((x>bxd)^bxf)PutPixel(xy[i], xy[i+1]);i=ex*2;
if((x>exd)^exf)PutPixel(xy[i], xy[i+1]);x++;
xy[1]--;
xy[2]++;
xy[4]--;
xy[7]--;
xy[9]++;
xy[10]--;
xy[12]++;
xy[15]++;
}
free(xy);
}
};//template<typename T,uint CHANNELS> class DrawGeometry
}//namespace hgl