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| procedure BitmapPrn(DCimp:HDC;Bmp:HBITMAP;X,Y,Zx,ZY:word;rop:longint);
var
dc: HDC;
isDcPalDevice : BOOL;
MemDc,memdc2 :hdc;
MemBitmap : hBitmap;
OldMemBitmap,oldbmp : hBitmap;
hDibHeader : Thandle;
pDibHeader : pointer;
hBits : Thandle;
pBits : pointer;
ScaleX : Double;
ScaleY : Double;
ppal : PLOGPALETTE;
pal : hPalette;
Oldpal : hPalette;
i : integer;
B:TBITMAP;
begin
{Get the screen dc}
dc := GetDc(0);
GetObject(BMP,Sizeof(B), @B);
{Create a compatible dc}
MemDc := CreateCompatibleDc(dc);
MemDc2 := CreateCompatibleDc(dc);
{create a bitmap}
MemBitmap := CreateCompatibleBitmap(Dc,B.bmwidth,B.bmheight);
{select the bitmap into the dc}
OldMemBitmap := SelectObject(MemDc, MemBitmap);
Oldbmp:=SelectObject(MemDc2, bmp);
{Lets prepare to try a fixup for broken video drivers}
isDcPalDevice := false;
if GetDeviceCaps(dc, RASTERCAPS) and RC_PALETTE = RC_PALETTE then
begin
GetMem(pPal, sizeof(TLOGPALETTE) + (255 * sizeof(TPALETTEENTRY)));
FillChar(pPal^, sizeof(TLOGPALETTE) + (255 * sizeof(TPALETTEENTRY)), #0);
pPal^.palVersion := $300;
pPal^.palNumEntries :=
GetSystemPaletteEntries(dc,0,256,pPal^.palPalEntry);
if pPal^.PalNumEntries <>0 then
begin
pal := CreatePalette(pPal^);
oldPal := SelectPalette(MemDc, Pal, false);
isDcPalDevice := true
end
else
FreeMem(pPal, sizeof(TLOGPALETTE) +(255 * sizeof(TPALETTEENTRY)));
end;
{copy from the screen to the memdc/bitmap}
BitBlt(MemDc,0, 0,b.bmwidth,b.bmheight,MemDc2,0,0,SrcCopy);
if isDcPalDevice = true then
begin
SelectPalette(MemDc, OldPal, false);
DeleteObject(Pal);
end;
{unselect the bitmap}
SelectObject(MemDc, OldMemBitmap);
{delete the memory dc}
DeleteDc(MemDc);
{Allocate memory for a DIB structure}
hDibHeader := GlobalAlloc(GHND, sizeof(TBITMAPINFO) +(sizeof(TRGBQUAD) * 256));
{get a pointer to the alloced memory}
pDibHeader := GlobalLock(hDibHeader);
{fill in the dib structure with info on the way we want the DIB}
FillChar(pDibHeader^,sizeof(TBITMAPINFO) + (sizeof(TRGBQUAD) * 256),#0);
PBITMAPINFOHEADER(pDibHeader)^.biSize :=sizeof(TBITMAPINFOHEADER);
PBITMAPINFOHEADER(pDibHeader)^.biPlanes := 1;
PBITMAPINFOHEADER(pDibHeader)^.biBitCount := 8;
PBITMAPINFOHEADER(pDibHeader)^.biWidth := b.bmwidth;
PBITMAPINFOHEADER(pDibHeader)^.biHeight := B.bmheight;
PBITMAPINFOHEADER(pDibHeader)^.biCompression := BI_RGB;
{find out how much memory for the bits}
GetDIBits(Memdc2,MemBitmap,0,B.Bmheight,nil,TBitmapInfo(pDibHeader^),DIB_RGB_COLORS);
{Alloc memory for the bits}
hBits := GlobalAlloc(GHND,PBitmapInfoHeader(pDibHeader)^.BiSizeImage);
{Get a pointer to the bits}
pBits := GlobalLock(hBits);
{Call fn again, but this time give us the bits!}
GetDIBits(Memdc2,MemBitmap,0,b.Bmheight,pBits,PBitmapInfo(pDibHeader)^,DIB_RGB_COLORS);
{Lets try a fixup for broken video drivers}
if isDcPalDevice = true then
begin
for i := 0 to (pPal^.PalNumEntries - 1) do
begin
PBitmapInfo(pDibHeader)^.bmiColors[i].rgbRed := pPal^.palPalEntry[i].peRed;
PBitmapInfo(pDibHeader)^.bmiColors[i].rgbGreen :=
pPal^.palPalEntry[i].peGreen;
PBitmapInfo(pDibHeader)^.bmiColors[i].rgbBlue :=
pPal^.palPalEntry[i].peBlue;
end;
FreeMem(pPal, sizeof(TLOGPALETTE) +(255 * sizeof(TPALETTEENTRY)));
end;
{Release the screen dc}
ReleaseDc(0, dc);
{Delete the bitmap}
DeleteObject(MemBitmap);
{Start print job}
(* Printer.BeginDoc;
{Scale print size}
if Printer.PageWidth < Printer.PageHeight then
begin
ScaleX := Printer.PageWidth;
ScaleY := self.Height * (Printer.PageWidth / self.Width);
end
else
begin
ScaleX := self.Width * (Printer.PageHeight / self.Height);
ScaleY := Printer.PageHeight;
end;
*)
{Just incase the printer drver is a palette device}
isDcPalDevice := false;
if GetDeviceCaps(Dcimp, RASTERCAPS) and RC_PALETTE = RC_PALETTE
then
begin
{Create palette from dib}
GetMem(pPal, sizeof(TLOGPALETTE) + (255 * sizeof(TPALETTEENTRY)));
FillChar(pPal^, sizeof(TLOGPALETTE) + (255 * sizeof(TPALETTEENTRY)), #0);
pPal^.palVersion := $300;
pPal^.palNumEntries := 256;
for i := 0 to (pPal^.PalNumEntries - 1) do
begin
pPal^.palPalEntry[i].peRed := PBitmapInfo(pDibHeader)^.bmiColors[i].rgbRed;
pPal^.palPalEntry[i].peGreen :=
PBitmapInfo(pDibHeader)^.bmiColors[i].rgbGreen;
pPal^.palPalEntry[i].peBlue := PBitmapInfo(pDibHeader)^.bmiColors[i].rgbBlue;
end;
pal := CreatePalette(pPal^);
FreeMem(pPal, sizeof(TLOGPALETTE) + (255 * sizeof(TPALETTEENTRY)));
oldPal := SelectPalette(Dcimp, Pal, false);
isDcPalDevice := true
end;
{send the bits to the printer}
StretchDiBits(Dcimp,impx(x),impy(y),impx(zx), ImpY(zy),0,
0,b.bmWidth, B.bmHeight,pBits,
PBitmapInfo(pDibHeader)^,DIB_RGB_COLORS,ROP);
{Just incase you printer drver is a palette device}
if isDcPalDevice = true then
begin
SelectPalette(DCimp, oldPal, false);
DeleteObject(Pal);
end;
{Clean up allocated memory}
GlobalUnlock(hBits);
GlobalFree(hBits);
GlobalUnlock(hDibHeader);
GlobalFree(hDibHeader);
{End the print job}
deletedc(memdc2);
end; |
