wil.pas

MirGame完整组件 开发传奇不可缺少的组件之一

end;

function  TWMImages.FGetImageBitmap (index: integer): TBitmap;
begin
   if LibType <> ltLoadBmp then exit;
   Result := GetCachedBitmap (index);
   {if index in [0..BmpList.Count-1] then begin
      Result := TBitmap (BmpList[index]);
   end else
      Result := nil;}
end;

procedure TWMImages.FSetDxDraw (fdd: TDxDraw);
begin
   FDxDraw := fdd;
end;

// *** DirectDrawSurface Functions

procedure TWMImages.LoadDxImage (position: integer; pdximg: PTDxImage);
var
   imginfo: TWMImageInfo;
   ddsd: DDSURFACEDESC;
   SBits, PSrc, DBits: PByte;
   n, slen, dlen: integer;
begin
   Stream.Seek (position, 0);
   Stream.Read (imginfo, sizeof(TWMImageInfo)-4);
   if UseDIBSurface then begin //DIB荤侩 滚弊 乐澜
      try
        lsDib.Clear;
        lsDib.Width := imginfo.Width;
        lsDib.Height := imginfo.Height;
      except
      end;
      lsDib.ColorTable := MainPalette;
      lsDib.UpdatePalette;
      DBits := lsDib.PBits;
      Stream.Read (DBits^, imginfo.Width * imgInfo.Height);

      pdximg.px := imginfo.px;
      pdximg.py := imginfo.py;
      pdximg.surface := TDirectDrawSurface.Create (FDDraw);
      pdximg.surface.SystemMemory := TRUE;
      pdximg.surface.SetSize (imginfo.Width, imginfo.Height);
      pdximg.surface.Canvas.Draw (0, 0, lsDib);
      pdximg.surface.Canvas.Release;

      pdximg.surface.TransparentColor := 0;

   end else begin //钱 胶农赴俊辑父 荤侩

      slen  := WidthBytes(imginfo.Width);
      GetMem (PSrc, slen * imgInfo.Height);
      SBits := PSrc;
      Stream.Read (PSrc^, slen * imgInfo.Height);
      try
         pdximg.surface := TDirectDrawSurface.Create (FDDraw);
         pdximg.surface.SystemMemory := TRUE;
         pdximg.surface.SetSize (slen, imginfo.Height);
         //pdximg.surface.Palette := MainSurfacePalette;

         pdximg.px := imginfo.px;
         pdximg.py := imginfo.py;

         ddsd.dwSize := SizeOf(ddsd);
         pdximg.surface.Lock (TRect(nil^), ddsd);
         DBits := ddsd.lpSurface;
         for n:=imginfo.Height-1 downto 0 do begin
            SBits := PByte (Integer(PSrc) + slen * n);
            Move(SBits^, DBits^, slen);
            Inc (integer(DBits), ddsd.lPitch);
         end;
         pdximg.surface.TransparentColor := 0;
      finally
         pdximg.surface.UnLock ();
         FreeMem (PSrc);
      end;
   end;
end;

procedure TWMImages.LoadBmpImage (position: integer; pbmpimg: PTBmpImage);
var
   imginfo: TWMImageInfo;
   ddsd: DDSURFACEDESC;
   DBits: PByte;
   n, slen, dlen: integer;
begin
   Stream.Seek (position, 0);
   Stream.Read (imginfo, sizeof(TWMImageInfo)-4);

   lsDib.Width := imginfo.Width;
   lsDib.Height := imginfo.Height;
   lsDib.ColorTable := MainPalette;
   lsDib.UpdatePalette;
   DBits := lsDib.PBits;
   Stream.Read (DBits^, imginfo.Width * imgInfo.Height);

   pbmpimg.bmp := TBitmap.Create;
   pbmpimg.bmp.Width := lsDib.Width;
   pbmpimg.bmp.Height := lsDib.Height;
   pbmpimg.bmp.Canvas.Draw (0, 0, lsDib);
   lsDib.Clear;
end;

procedure TWMImages.ClearCache;
var
   i: integer;
begin
   for i:=0 to ImageCount-1 do begin
      if ImgArr[i].Surface <> nil then begin
         ImgArr[i].Surface.Free;
         ImgArr[i].Surface := nil;
      end;
   end;
end;

function  TWMImages.GetImage (index: integer; var px, py: integer): TDirectDrawSurface;
begin
   if (index >= 0) and (index < ImageCount) then begin
      px := ImgArr[index].px;
      py := ImgArr[index].py;
      Result := ImgArr[index].surface;
   end else
      Result := nil;
end;

{--------------- BMP functions ----------------}

//释放5秒后还未使用的图片
procedure TWMImages.FreeOldBmps;
var
   i, n, ntime, curtime, limit: integer;
begin
   n := -1;
   ntime := 0;
   for i:=0 to ImageCount-1 do begin
      curtime := GetTickCount;
      if BmpArr[i].Bmp <> nil then begin
         if curtime - BmpArr[i].LatestTime > 5 * 1000 then begin
            BmpArr[i].Bmp.Free;
            BmpArr[i].Bmp := nil;
         end else begin
            if curtime - BmpArr[i].LatestTime > ntime then begin
               ntime := curtime - BmpArr[i].LatestTime;
               n := i;
            end;
         end;
      end;
   end;
end;

//释放指定索引的图片
procedure TWMImages.FreeBitmap (index: integer);
begin
   if (index >= 0) and (index < ImageCount) then begin
      if BmpArr[index].Bmp <> nil then begin
         BmpArr[index].Bmp.FreeImage;
         BmpArr[index].Bmp.Free;
         BmpArr[index].Bmp := nil;
      end;
   end;
end;


//释放1分钟后未使用的图片
procedure TWMImages.FreeOldMemorys;
var
   i, n, ntime, curtime, limit: integer;
begin
   n := -1;
   ntime := 0;
   curtime := GetTickCount;
   for i:=0 to ImageCount-1 do begin
      if ImgArr[i].Surface <> nil then begin
         if curtime - ImgArr[i].LatestTime > 5 * 60 * 1000 then begin
            ImgArr[i].Surface.Free;
            ImgArr[i].Surface := nil;
         end;
      end;
   end;
end;

//返回指定图片号的图面
function  TWMImages.GetCachedSurface (index: integer): TDirectDrawSurface;
var
   position: integer;
begin
   Result := nil;  
   try
   if (index < 0) or (index >= ImageCount) then exit;
   if GetTickCount - memchecktime > 10000 then  begin
      memchecktime := GetTickCount;
      FreeOldMemorys;
   end;
   if ImgArr[index].Surface = nil then begin //若指定图片已经释放，则重新装载.
      if index < IndexList.Count then begin
         position := Integer(IndexList[index]);
         LoadDxImage (position, @ImgArr[index]);
         ImgArr[index].LatestTime := GetTickCount;
         Result := ImgArr[index].Surface;
      end;
   end else begin
      ImgArr[index].LatestTime := GetTickCount;
      Result := ImgArr[index].Surface;
   end;
   except
   end;
end;

function  TWMImages.GetCachedImage (index: integer; var px, py: integer): TDirectDrawSurface;
var
   position: integer;
begin
   Result := nil;  
   try
   if (index < 0) or (index >= ImageCount) then exit;
   if GetTickCount - memchecktime > 10000 then  begin
      memchecktime := GetTickCount;
      FreeOldMemorys;
   end;
   if ImgArr[index].Surface = nil then begin //重新装载
      if index < IndexList.Count then begin
         position := Integer(IndexList[index]);
         LoadDxImage (position, @ImgArr[index]);
         ImgArr[index].LatestTime := GetTickCount;
         px := ImgArr[index].px;
         py := ImgArr[index].py;
         Result := ImgArr[index].Surface;
      end;
   end else begin
      ImgArr[index].LatestTime := GetTickCount;
      px := ImgArr[index].px;
      py := ImgArr[index].py;
      Result := ImgArr[index].Surface;
   end;
   except

   end;
end;

function  TWMImages.GetCachedBitmap (index: integer): TBitmap;
var
   position: integer;
begin
   Result := nil;
   if (index < 0) or (index >= ImageCount) then exit;
   if BmpArr[index].Bmp = nil then begin
      if index < IndexList.Count then begin
         position := Integer(IndexList[index]);
         LoadBmpImage (position, @BmpArr[index]);
         BmpArr[index].LatestTime := GetTickCount;
         Result := BmpArr[index].Bmp;
         FreeOldBmps;
      end;
   end else begin
      BmpArr[index].LatestTime := GetTickCount;
      Result := BmpArr[index].Bmp;
   end;
end;

//按缩放比率画出执行序号的图片
procedure TWMImages.DrawZoom (paper: TCanvas; x, y, index: integer; zoom: Real);
var
   rc: TRect;
   bmp: TBitmap;
begin
   if LibType <> ltLoadBmp then exit;
   bmp := Bitmaps[index];
   if bmp <> nil then begin
      rc.Left := x;
      rc.Top  := y;
      rc.Right := x + Round (bmp.Width * zoom);
      rc.Bottom := y + Round (bmp.Height * zoom);
      if (rc.Right > rc.Left) and (rc.Bottom > rc.Top) then begin
         paper.StretchDraw (rc, Bmp);
         FreeBitmap (index);
      end;
   end;
end;

//
procedure TWMImages.DrawZoomEx (paper: TCanvas; x, y, index: integer; zoom: Real; leftzero: Boolean);
var
   rc: TRect;
   bmp, bmp2: TBitmap;
begin
   if LibType <> ltLoadBmp then exit;
   bmp := Bitmaps[index];
   if bmp <> nil then begin
      Bmp2 := TBitmap.Create;
      Bmp2.Width := Round (Bmp.Width * zoom);
      Bmp2.Height := Round (Bmp.Height * zoom);
      rc.Left := x;
      rc.Top  := y;
      rc.Right := x + Round (bmp.Width * zoom);
      rc.Bottom := y + Round (bmp.Height * zoom);
      if (rc.Right > rc.Left) and (rc.Bottom > rc.Top) then begin
         Bmp2.Canvas.StretchDraw (Rect(0, 0, Bmp2.Width, Bmp2.Height), Bmp);
         if leftzero then begin
            SpliteBitmap (paper.Handle, X, Y, Bmp2, $0)
         end else begin
            SpliteBitmap (paper.Handle, X, Y-Bmp2.Height, Bmp2, $0);
         end;
      end;
      FreeBitmap (index);
      bmp2.Free;
   end;
end;
end.