void CGraphView::Blit(const Canvas& src,int x,int y,bool trans)
{
if (trans)
{
AlphaBlit(src,x,y);
return;
}
const int bpp=4;
int nDestwidth=pDib->Width();
int nDestheight=pDib->Height();
int xstart=0;
int ystart=0;
int xlen=src.Width();
int ylen=src.Height();
int ox=x;
int oy=y;
DoClipping(x,y,xstart,xlen,ystart,ylen);
if (xlen<1 || ylen<1) return; // offscreen
u32* pDest=(u32*)(pDib->GetPixels())+(y*nDestwidth+x);
u32* pSrc =(u32*)src.GetPixels() +(ystart*src.Width()+xstart);
while (ylen)
{
int x=xlen;
while (x)
{
// convert from ARGB to ABGR
/*
u32 c=*pSrc++;
u8 r=(u8)((c>>16)&255);
u8 b=(u8)(c&255);
c&=0xFF00FF00; // the alpha and green channels don't move, keep them intact
*pDest++=c|(b<<16)|r;
/*/
// Did I need to convert this to ASM? Doubt it. ;D
__asm
{
mov ebx,[pSrc]
mov eax,[ebx]
mov ebx,[pDest]
mov [ebx],eax
mov al,[ebx]
mov ah,[ebx+2]
mov [ebx],ah // have to switch from BGRA to RGBA
mov [ebx+2],al
}
++pSrc; ++pDest;
//*/
x--;
}
pDest+=nDestwidth-xlen;
pSrc+=src.Width()-xlen;
--ylen;
}
}
void CGraphView::AlphaBlit(const Canvas& src,int x,int y)
{
const int bpp=4;
int nDestwidth=pDib->Width();
int nDestheight=pDib->Height();
int xstart=0;
int ystart=0;
int xlen=src.Width();
int ylen=src.Height();
int ox=x;
int oy=y;
DoClipping(x,y,xstart,xlen,ystart,ylen);
if (xlen<1 || ylen<1) return; // offscreen
u32* pDest=(u32*)(pDib->GetPixels())+(y*nDestwidth+x);
u32* pSrc =(u32*)src.GetPixels() +(ystart*src.Width()+xstart);
while (ylen)
{
int x=xlen;
while (x)
{
// convert from ARGB to ABGR
/*
u32 c=*pSrc++;
u8 r=(u8)((c>>16)&255);
u8 b=(u8)(c&255);
c&=0xFF00FF00; // the alpha and green channels don't move, keep them intact
*pDest++=c|(b<<16)|r;
/*/
// Did I need to convert this to ASM? Doubt it. ;D
__asm
{
mov ebx,[pSrc]
mov eax,[ebx]
test eax,0xFF000000
jz nodraw
mov ebx,[pDest]
mov [ebx],eax
mov al,[ebx]
mov ah,[ebx+2]
mov [ebx],ah // have to switch from BGRA to RGBA
mov [ebx+2],al
nodraw:
}
++pSrc; ++pDest;
//*/
x--;
}
pDest+=nDestwidth-xlen;
pSrc+=src.Width()-xlen;
--ylen;
}
}
void CGraphView::HLine(int x1,int x2,int y,u32 colour)
{
if (x1>x2)
std::swap<int>(x1,x2);
if (y<0 || y>=nDIBsize) return;
if (x1<0) x1=0;
if (x2<0) return;
if (x1>=nDIBsize) return;
if (x2>=nDIBsize) x2=nDIBsize-1;
u32* p=(u32*)pDib->GetPixels()+(y*pDib->Width())+x1;
int xlen=x2-x1+1;
while (xlen--)
*p++=colour;
}
void CGraphView::VLine(int x,int y1,int y2,u32 colour)
{
if (y1>y2)
std::swap<int>(y1,y2);
if (x<0 || x>=nDIBsize) return;
if (y1<0) y1=0;
if (y2<0) return;
if (y1>=nDIBsize) return;
if (y2>=nDIBsize) y2=nDIBsize-1;
u32* p=(u32*)pDib->GetPixels()+(y1*pDib->Width())+x;
int ylen=y2-y1+1;
while (ylen--)
{
*p=colour;
p+=pDib->Width();
}
}
void CGraphView::DrawRect(int x1,int y1,int x2,int y2,u32 colour)
{
HLine(x1,x2,y1,colour);
HLine(x1,x2,y2,colour);
VLine(x1,y1,y2,colour);
VLine(x2,y1,y2,colour);
}