我正在尝试读取HDC给定区域上的所有像素,以查找是否存在颜色,目前我想出了:
IDirect3DSurface9* pSurface = 0;
p1->CreateOffscreenPlainSurface(1280, 1024,D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &pSurface, NULL);
p1->GetFrontBufferData(0, pSurface);
//assert( pSurface );
if( pSurface && GetTickCount() > dwGAKS_Fix )
{
HDC dc;
pSurface->GetDC( &dc );
COLORREF dpurp = D3DCOLOR_ARGB (255,102,0 ,153);
for( DWORD h = 610; h <= 670; h++ )
{
for( DWORD w = 480; w<=530; w++ )
{
COLORREF dwPixel = GetPixel( dc, h, w );
// CString strPixel; strPixel.Format( "Pixel col: %u at: %u X %u", dwPixel, d, i );
//if( dx_Font )
if( dwPixel == dpurp )
{
dx_Font->DrawTextA(NULL, "Shoot", strlen("Shoot"), &pos, DT_NOCLIP, D3DCOLOR_XRGB(0, 255, 0));
}
else
dx_Font->DrawTextA(NULL, "NoShoot", strlen("NoShoot"), &pos, DT_NOCLIP, D3DCOLOR_XRGB(0, 255, 0));
}
}
dwGAKS_Fix = GetTickCount() + 15;
pSurface->ReleaseDC( dc );
pSurface->Release();
但是这个解决方案很慢,很慢,我需要的东西更多......专业人士
D3DLOCKED_RECT d3dlocked;
if( D3D_OK == pSurface->LockRect( &d3dlocked, 0, 0 ) )
{
UINT *pixels=(UINT *)locked.pBits;
if(pixels[52+15*1024]&0xFFFFFF00==dpurp)
{
}
pSurface->UnlockRect();
}
答案 0 :(得分:2)
GetPixel
总是很慢。您可以使用IDirect3DSurface9::LockRect
直接访问屏幕外表面中的位,然后自己扫描位图,这应该更快。
(编辑)任何给定的像素(x,y)是在以下位置找到的32位值:
*(DWORD*)(((BYTE*)d3dlocked.pBits) + y * d3dlocked.Pitch + x * sizeof(DWORD));
您应该使用0x00ffffff和值来忽略Alpha通道。