📄 our_draw16.c
字号:
xs+=ks; //next line xs
xe+=ke; //next line xe
}
return;
}
for(;yinc<y2;yinc++) //scan lines
{
k_r_inc=rs;
k_g_inc=gs;
k_b_inc=bs;
//------------------------------------------------------
xinc=xs>>(DRAW_P_SHFT_X);
if(xinc<0)
{
k_r_inc-=xinc*kre;
k_g_inc-=xinc*kge;
k_b_inc-=xinc*kbe;
xinc=0;
}
y1=(xe>>(DRAW_P_SHFT_X));
if(y1>=OUR_D_screem_w)
{
y1=OUR_D_screem_w-1;
}
else if(y1>0)
{
dest[xinc++] =((k_r_inc>>(SHIFR_L-8))&OUR_RGB_MASK500)+\
((k_g_inc>>(SHIFR_L-3))&OUR_RGB_MASK060)+((k_b_inc>>(SHIFR_L+3))&OUR_RGB_MASK005);
}
for(;xinc<=y1;)
{
FILE_GOURAUD;
}
rs+=krs;
gs+=kgs;
bs+=kbs;
dest+=mempitch; //point to next line
xs+=ks; //next line xs
xe+=ke; //next line xe
}
P3_G:
if(y2<y3) //the butt part
{
y1=(1<<(DRAW_P_SHFT_X))/(y2-y3);
x1=((x2-x3))*y1;
y1>>=(DRAW_P_SHFT_X-SHIFR_L);
if(x1>ke)
{
ks=x1;
krs=(((color2&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*y1;
kgs=(((color2&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*y1;
kbs=(((color2&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*y1;
}
else
{
ke=x1;
}
if(y2<0)
{
rs-=y2*krs;
gs-=y2*kgs;
bs-=y2*kbs;
dest-=y2*mempitch; //point to next line
xs-=y2*ks; //next line xs
xe-=y2*ke; //next line xe
}/**/
if(y3>OUR_D_screem_h-1)
{
y3=OUR_D_screem_h-1;
}
for(;yinc<=y3;yinc++)
{
k_r_inc=rs;
k_g_inc=gs;
k_b_inc=bs;
//------------------------------------------------------
xinc=xs>>(DRAW_P_SHFT_X);
if(xinc<0)
{
k_r_inc-=xinc*kre;
k_g_inc-=xinc*kge;
k_b_inc-=xinc*kbe;
xinc=0;
}
y1=(xe>>(DRAW_P_SHFT_X));
if(y1>=OUR_D_screem_w)
{
y1=OUR_D_screem_w-1;
}
else if(y1>0)
{
dest[xinc++] =((k_r_inc>>(SHIFR_L-8))&OUR_RGB_MASK500)+\
((k_g_inc>>(SHIFR_L-3))&OUR_RGB_MASK060)+((k_b_inc>>(SHIFR_L+3))&OUR_RGB_MASK005);
}
for(;xinc<=y1;)
{
FILE_GOURAUD;
}
rs+=krs;
gs+=kgs;
bs+=kbs;
dest+=mempitch; //point to next line
xs+=ks; //next line xs
xe+=ke; //next line xe
}
}
return;
}
#else
#endif
//---------------------------------------------------------------------
else if(y2<y3)//the butt part
{
xs=((1<<SHIFR_L))/(y1-y3); //y1=y2
ks=((x1-x3))*xs; //slope 1 --> 2
ke=((x2-x3))*xs; //slope 1 --> 3
if(ks>ke) //start slope must be smaller than the end one
{
xe=((1<<SHIFR_L))/(x2-x1);
krs=(((color1&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*xs;
kre=(((color2&OUR_RGB_MASK0500)-(color1&OUR_RGB_MASK0500))>>16)*xe;
kgs=(((color1&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*xs;
kge=(((color2&OUR_RGB_MASK0060)-(color1&OUR_RGB_MASK0060))>>8)*xe;
kbs=(((color1&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*xs;
kbe=(((color2&OUR_RGB_MASK0005)-(color1&OUR_RGB_MASK0005)))*xe;
rs=(color1&OUR_RGB_MASK0500)<<(SHIFR_L-16);
gs=(color1&OUR_RGB_MASK0060)<<(SHIFR_L-8);
bs=(color1&OUR_RGB_MASK0005)<<SHIFR_L;
xs=x1<<SHIFR_L;
xe=x2<<SHIFR_L;
}
else if(ks<ke)
{
xe=((1<<SHIFR_L))/(x1-x2);
krs=(((color2&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*xs;
kre=(((color1&OUR_RGB_MASK0500)-(color2&OUR_RGB_MASK0500))>>16)*xe;
kgs=(((color2&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*xs;
kge=(((color1&OUR_RGB_MASK0060)-(color2&OUR_RGB_MASK0060))>>8)*xe;
kbs=(((color2&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*xs;
kbe=(((color1&OUR_RGB_MASK0005)-(color2&OUR_RGB_MASK0005)))*xe;
OUR_SWAP(ks,ke,xs);
rs=(color2&OUR_RGB_MASK0500)<<(SHIFR_L-16);
gs=(color2&OUR_RGB_MASK0060)<<(SHIFR_L-8);
bs=(color2&OUR_RGB_MASK0005)<<SHIFR_L;
xe=x1<<SHIFR_L;
xs=x2<<SHIFR_L;
}
else
{
return;
}
//clip
if(y1<0)
{
rs-=y1*krs;
gs-=y1*kgs;
bs-=y1*kbs;
dest-=y1*mempitch; //point to next line
xs-=y1*ks; //next line xs
xe-=y1*ke; //next line xe
y1=0;
}
if(y3>=OUR_D_screem_h)
{
y3=OUR_D_screem_h;
}
for(yinc=y1;yinc<y3;yinc++) //scan lines
{
k_r_inc=rs;
k_g_inc=gs;
k_b_inc=bs;
//------------------------------------------------------
xinc=xs>>(DRAW_P_SHFT_X);
if(xinc<0)
{
k_r_inc-=xinc*kre;
k_g_inc-=xinc*kge;
k_b_inc-=xinc*kbe;
xinc=0;
}
y1=(xe>>(DRAW_P_SHFT_X));
if(y1>=OUR_D_screem_w)
{
y1=OUR_D_screem_w-1;
}
else if(y1>0)
{
dest[xinc++] =((k_r_inc>>(SHIFR_L-8))&OUR_RGB_MASK500)+\
((k_g_inc>>(SHIFR_L-3))&OUR_RGB_MASK060)+((k_b_inc>>(SHIFR_L+3))&OUR_RGB_MASK005);
}
for(;xinc<=y1;)
{
FILE_GOURAUD;
}
rs+=krs;
gs+=kgs;
bs+=kbs;
dest+=mempitch; //point to next line
xs+=ks; //next line xs
xe+=ke;
}
return;
}
}
//------------------------------------------------------
#if 0
void OUR_Draw_Gouraud_2D16( int x1,int y1,
int x2,int y2,
int x3,int y3,
CLR color1,
CLR color2,
CLR color3,
UCHAR *dest_buffer, int mempitch)
{
int xs,xe,ks,ke,xinc;
int yinc;
CLR rs,re,gs,ge,bs,be;
int krs,kre,kgs,kge,kbs,kbe;
int k_r_inc;
int k_g_inc;
int k_b_inc;
CLR16 *dest;
/*
x1=200;
y1=0;
x2=1;
y2=200;
x3=350;
y3=350;
color1 = 0x000000;
color2 = 0xff0000;
color3 = 0x000000;
*/
//make sure y1<y2<y3
if(y1>y2)
{
OUR_SWAP(y1,y2,xs);
OUR_SWAP(x1,x2,xs);
OUR_SWAP(color1,color2,rs);
}
if(y1>y3)
{
OUR_SWAP(y1,y3,xs);
OUR_SWAP(x1,x3,xs);
OUR_SWAP(color1,color3,rs);
}
if(y2>y3)
{
OUR_SWAP(y2,y3,xs);
OUR_SWAP(x2,x3,xs);
OUR_SWAP(color2,color3,rs);
} //18t
//mempitch>>=2; //(sizeof(dest)/2);
dest = (CLR16*)dest_buffer +y1*mempitch; //point to the line of y1
#if 1
if(y1<y2 ) //the top part
{
xs=(1<<(DRAW_P_SHFT_X))/(y1-y2);
xe=(1<<(DRAW_P_SHFT_X))/(y1-y3);
ks=((x1-x2))*xs; //slope 1 --> 2
ke=((x1-x3))*xe; //slope 1 --> 3
xs>>=(DRAW_P_SHFT_X-SHIFR_L);
xe>>=(DRAW_P_SHFT_X-SHIFR_L);
if(ks>ke) //start slope must be smaller than the end one
{
kre=(((color1&OUR_RGB_MASK0500)-(color2&OUR_RGB_MASK0500))>>16)*xs;
krs=(((color1&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*xe;
kge=(((color1&OUR_RGB_MASK0060)-(color2&OUR_RGB_MASK0060))>>8)*xs;
kgs=(((color1&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*xe;
kbe=(((color1&OUR_RGB_MASK0005)-(color2&OUR_RGB_MASK0005)))*xs;
kbs=(((color1&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*xe;
OUR_SWAP(ks,ke,xs);
}
else if(ks<ke)
{
krs=(((color1&OUR_RGB_MASK0500)-(color2&OUR_RGB_MASK0500))>>16)*xs;
kre=(((color1&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*xe;
kgs=(((color1&OUR_RGB_MASK0060)-(color2&OUR_RGB_MASK0060))>>8)*xs;
kge=(((color1&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*xe;
kbs=(((color1&OUR_RGB_MASK0005)-(color2&OUR_RGB_MASK0005)))*xs;
kbe=(((color1&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*xe;
}
else
{
return;
}
#define GND_KKKK 0
if((ke-ks)<(1<<DRAW_P_SHFT_X))
{
xs=((1<<(SHIFT-4)))/((ke-ks));
kre=(((kre-krs)>>5)*xs)>>(SHIFT-SHIFR_L-5-4);
kge=(((kge-kgs)>>5)*xs)>>(SHIFT-SHIFR_L-5-4);
kbe=(((kbe-kbs)>>5)*xs)>>(SHIFT-SHIFR_L-5-4);
}
else
{
xs=((1<<(SHIFT)))/((ke-ks)>>GND_KKKK);
kre=(((kre-krs)>>5)*xs)>>(SHIFT-SHIFR_L-5+GND_KKKK);
kge=(((kge-kgs)>>5)*xs)>>(SHIFT-SHIFR_L-5+GND_KKKK);
kbe=(((kbe-kbs)>>5)*xs)>>(SHIFT-SHIFR_L-5+GND_KKKK);
}/**/
xs=(x1<<(DRAW_P_SHFT_X));
xe=(x1<<(DRAW_P_SHFT_X));
rs=(color1&OUR_RGB_MASK0500)<<(SHIFR_L-16);
gs=(color1&OUR_RGB_MASK0060)<<(SHIFR_L-8);
bs=(color1&OUR_RGB_MASK0005)<<SHIFR_L;
for(yinc=y1;yinc<y2;yinc++) //scan lines
{
k_r_inc=rs;
k_g_inc=gs;
k_b_inc=bs;
//------------------------------------------------------
xinc=xs>>(DRAW_P_SHFT_X);
y1=(xe>>(DRAW_P_SHFT_X));
//dest[xinc++] =((k_r_inc>>(SHIFR_L-16))&OUR_RGB_MASK0800)+\
// ((k_g_inc>>(SHIFR_L-8))&OUR_RGB_MASK0080)+((k_b_inc>>SHIFR_L)&OUR_RGB_MASK0008);
dest[xinc++] =((k_r_inc>>(SHIFR_L-8))&OUR_RGB_MASK500)+\
((k_g_inc>>(SHIFR_L-3))&OUR_RGB_MASK060)+((k_b_inc>>(SHIFR_L+3))&OUR_RGB_MASK005);
#if OUR_FAST_2D
for(;xinc<=y1-8;)
{
FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;
FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;
}
if(xinc<=y1-4)
{
FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;FILE_GOURAUD;
}
for(;xinc<=y1;)
{
FILE_GOURAUD;
}
#else
for(;xinc<=y1;)
{
FILE_GOURAUD;
}
#endif
rs+=krs;
gs+=kgs;
bs+=kbs;
dest+=mempitch; //point to next line
xs+=ks; //next line xs
xe+=ke; //next line xe
}
if(y2<y3) //the butt part
{
y1=(1<<(DRAW_P_SHFT_X))/(y2-y3);
x1=((x2-x3))*y1;
y1>>=(DRAW_P_SHFT_X-SHIFR_L);
if(x1>ke)
{
ks=x1;
krs=(((color2&OUR_RGB_MASK0500)-(color3&OUR_RGB_MASK0500))>>16)*y1;
kgs=(((color2&OUR_RGB_MASK0060)-(color3&OUR_RGB_MASK0060))>>8)*y1;
kbs=(((color2&OUR_RGB_MASK0005)-(color3&OUR_RGB_MASK0005)))*y1;
}
else
{
ke=x1;
}
for(;yinc<=y3;yinc++)
{
k_r_inc=rs;
k_g_inc=gs;
k_b_inc=bs;
//------------------------------------------------------
xinc=xs>>(DRAW_P_SHFT_X);
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -