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  1. #include "std.h"
  2.  
  3. #include "emul.h"
  4. #include "vars.h"
  5. #include "dx.h"
  6. #include "dxovr.h"
  7. #include "dxerr.h"
  8. #include "init.h"
  9.  
  10. static DWORD colorkey=-1U;
  11.  
  12. void update_overlay()
  13. {
  14.  
  15.    RECT rc_src, rc_dst;
  16.  
  17.    GetClientRect(wnd, &rc_dst);
  18.    ClientToScreen(wnd, (POINT*)&rc_dst.left);
  19.    ClientToScreen(wnd, (POINT*)&rc_dst.right);
  20.  
  21.    if (rc_dst.left == rc_dst.right || rc_dst.top == rc_dst.bottom) return;
  22.  
  23.    rc_src.left = rc_src.top = 0;
  24.    rc_src.right = LONG(temp.ox);
  25.    rc_src.bottom = LONG(temp.oy);
  26.  
  27.    if (wnd == GetForegroundWindow() && rc_dst.left >= 0 && rc_dst.top >= 0)
  28.    {
  29.       DDSURFACEDESC desc; desc.dwSize = sizeof desc;
  30.       if (sprim->IsLost() == DDERR_SURFACELOST)
  31.           sprim->Restore();
  32.       HRESULT r = sprim->Lock(nullptr, &desc, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT | DDLOCK_READONLY, nullptr);
  33.       if (r != DD_OK) { printrdd("IDirectDrawSurface2::Lock() [test]", r); exit(); }
  34.       char *ptr = (char*)desc.lpSurface + rc_dst.top*desc.lPitch + rc_dst.left*LONG(desc.ddpfPixelFormat.dwRGBBitCount)/8;
  35.       colorkey = *(unsigned*)ptr;
  36.       sprim->Unlock(nullptr);
  37.       if (desc.ddpfPixelFormat.dwRGBBitCount < 32)
  38.          colorkey &= (1<<desc.ddpfPixelFormat.dwRGBBitCount)-1;
  39.    }
  40.  
  41.    // use min and max stretch
  42.    DDCAPS caps;
  43.    caps.dwSize = sizeof caps;
  44.    dd->GetCaps(&caps,nullptr);
  45.    if ((rc_dst.right - rc_dst.left)*1000/int(temp.ox) > (int)caps.dwMaxOverlayStretch)
  46.       rc_dst.right = rc_dst.left + LONG(temp.ox*caps.dwMaxOverlayStretch/1000);
  47.    if ((rc_dst.bottom - rc_dst.top)*1000/int(temp.oy) > (int)caps.dwMaxOverlayStretch)
  48.       rc_dst.bottom = rc_dst.top + LONG(temp.oy*caps.dwMaxOverlayStretch/1000);
  49.    if ((rc_dst.right - rc_dst.left)*1000/int(temp.ox) < (int)caps.dwMinOverlayStretch)
  50.       rc_dst.right = rc_dst.left + LONG(temp.ox*caps.dwMinOverlayStretch/1000);
  51.    if ((rc_dst.bottom - rc_dst.top)*1000/int(temp.oy) < (int)caps.dwMinOverlayStretch)
  52.       rc_dst.bottom = rc_dst.top + LONG(temp.oy*caps.dwMinOverlayStretch/1000);
  53.  
  54.    // setup boundaries for non-clipping overlay
  55.    int mx = GetSystemMetrics(SM_CXSCREEN), my = GetSystemMetrics(SM_CYSCREEN);
  56.    if(rc_dst.left < 0)
  57.    {
  58.        rc_src.left = -rc_dst.left * (rc_src.right - rc_src.left) / (rc_dst.right - rc_dst.left);
  59.        rc_dst.left = 0;
  60.    }
  61.    if(rc_dst.top < 0)
  62.    {
  63.        rc_src.top = -rc_dst.top * (rc_src.bottom - rc_src.top) / (rc_dst.bottom - rc_dst.top);
  64.        rc_dst.top = 0;
  65.    }
  66.    if(rc_dst.right > mx)
  67.    {
  68.        rc_src.right = rc_src.left + (mx - rc_dst.left) * (rc_src.right - rc_src.left) / (rc_dst.right - rc_dst.left);
  69.        rc_dst.right = mx;
  70.    }
  71.    if(rc_dst.bottom > my)
  72.    {
  73.        rc_src.bottom = (my - rc_dst.top) * (rc_src.bottom - rc_src.top) / (rc_dst.bottom - rc_dst.top);
  74.        rc_dst.bottom = my;
  75.    }
  76.  
  77.    if (colorkey==-1U) return;
  78.    if (rc_dst.left >= rc_dst.right || rc_dst.top >= rc_dst.bottom) return;
  79.    if (rc_src.left >= rc_src.right || rc_src.top >= rc_src.bottom) return;
  80.  
  81.    DDOVERLAYFX fx = { sizeof fx };
  82.    fx.dckDestColorkey.dwColorSpaceLowValue = fx.dckDestColorkey.dwColorSpaceHighValue = colorkey;
  83.  
  84.    for (;;) {
  85.       HRESULT r = surf0->UpdateOverlay(&rc_src, sprim, &rc_dst, DDOVER_SHOW | DDOVER_DDFX | DDOVER_KEYDESTOVERRIDE, &fx);
  86.       if (r == DD_OK) break;
  87.       if (r == DDERR_SURFACELOST) {
  88.          if (surf0->Restore() != DD_OK) set_vidmode(); // recreate overlay
  89.          break; // another update_overlay in set_vidmode() -> UpdateWindow()
  90.       }
  91.       printrdd("IDirectDrawSurface2::UpdateOverlay()", r); exit();
  92.    }
  93. }
  94.