[reqyz]

В общем суть вопроса: есть битмап, хранящийся в памяти по указателю Pointer, есть хэндл нужного окна, вопрос, как отрисовать картинку в окне, используя только АПИ функции
п.с. пытался выдрать ReadDIB, но ни к чему хорошему это не привело.

Код:

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procedure ReadDIB(Stream: Pointer; ImageSize: LongWord; bmf: PBitmapFileHeader); var   ReadPos:cardinal;     procedure Read(var Buf;Count:integer);   begin     Move(Pointer(Cardinal(Stream)+ReadPos)^,Buf,Count);     inc(ReadPos,Count);   end;     function GetDInColors(BitCount: Word): Integer;   begin     case BitCount of       1, 4, 8: Result := 1 shl BitCount;     else       Result := 0;     end;   end;     procedure RGBTripleToQuad(var ColorTable);   type     PRGBTripleArray = ^TRGBTripleArray;     TRGBTripleArray = array [Byte] of TRGBTriple;     PRGBQuadArray = ^TRGBQuadArray;     TRGBQuadArray = array [Byte] of TRGBQuad;   var     I: Integer;     P3: PRGBTripleArray;     P4: PRGBQuadArray;   begin     P3 := PRGBTripleArray(@ColorTable);     P4 := Pointer(P3);     for I := 255 downto 1 do  // don't move zeroth item       with P4^[i], P3^[i] do       begin                     // order is significant for last item moved         rgbRed := rgbtRed;         rgbGreen := rgbtGreen;         rgbBlue := rgbtBlue;         rgbReserved := 0;       end;     P4^[0].rgbReserved := 0;   end;   function SystemPaletteOverride(var Pal: TMaxLogPalette): Boolean; var   DC: HDC;   SysPalSize: Integer; begin   Result := False;   if SystemPalette16 <> 0 then   begin     DC := GetDC(0);     try       SysPalSize := GetDeviceCaps(DC, SIZEPALETTE);       if SysPalSize >= 16 then       begin         { Ignore the disk image of the palette for 16 color bitmaps.           Replace with the first and last 8 colors of the system palette }         GetPaletteEntries(SystemPalette16, 0, 8, Pal.palPalEntry);         GetPaletteEntries(SystemPalette16, 8, 8, Pal.palPalEntry[Pal.palNumEntries - 8]);         Result := True;       end     finally       ReleaseDC(0,DC);     end;   end; end;   procedure ByteSwapColors(var Colors; Count: Integer); var   // convert RGB to BGR and vice-versa.  TRGBQuad <-> TPaletteEntry   SysInfo: TSystemInfo; begin   GetSystemInfo(SysInfo);   asm         MOV   EDX, Colors         MOV   ECX, Count         DEC   ECX         JS    @@END         LEA   EAX, SysInfo         CMP   [EAX].TSystemInfo.wProcessorLevel, 3         JE    @@386   @@1:  MOV   EAX, [EDX+ECX*4]         BSWAP EAX         SHR   EAX,8         MOV   [EDX+ECX*4],EAX         DEC   ECX         JNS   @@1         JMP   @@END   @@386:         PUSH  EBX   @@2:  XOR   EBX,EBX         MOV   EAX, [EDX+ECX*4]         MOV   BH, AL         MOV   BL, AH         SHR   EAX,16         SHL   EBX,8         MOV   BL, AL         MOV   [EDX+ECX*4],EBX         DEC   ECX         JNS   @@2         POP   EBX     @@END:   end; end;   function PaletteFromDIBColorTable(DIBHandle: THandle; ColorTable: Pointer;   ColorCount: Integer): HPalette; var   DC: HDC;   Save: THandle;   Pal: TMaxLogPalette; begin   Result := 0;   Pal.palVersion := $300;   if DIBHandle <> 0 then   begin     DC := CreateCompatibleDC(0);     Save := SelectObject(DC, DIBHandle);     Pal.palNumEntries := GetDIBColorTable(DC, 0, 256, Pal.palPalEntry);     SelectObject(DC, Save);     DeleteDC(DC);   end   else   begin     Pal.palNumEntries := ColorCount;     Move(ColorTable^, Pal.palPalEntry, ColorCount * 4);   end;   if Pal.palNumEntries = 0 then Exit;   if (Pal.palNumEntries <> 16) or not SystemPaletteOverride(Pal) then     ByteSwapColors(Pal.palPalEntry, Pal.palNumEntries);   Result := CreatePalette(PLogPalette(@Pal)^); end;   const   DIBPalSizes: array [Boolean] of Byte = (sizeof(TRGBQuad), sizeof(TRGBTriple)); var   DC, MemDC: HDC;   BitsMem: Pointer;   OS2Header: TBitmapCoreHeader;   BitmapInfo: PBitmapInfo;   ColorTable: Pointer;   HeaderSize: Integer;   OS2Format: Boolean;   BMHandle, OldBMP: HBITMAP;   DIB: TDIBSection;   Pal, OldPal: HPalette; //  RLEStream: TStream;   vbmf: TBitmapFileHeader; {$IFDEF LINUX}   I: Integer; {$ENDIF} begin   Pal := 0;   BMHandle := 0; //  RLEStream := nil;     ReadPos:=0;     Read(HeaderSize, sizeof(HeaderSize));   OS2Format := HeaderSize = sizeof(OS2Header);   if OS2Format then HeaderSize := sizeof(TBitmapInfoHeader);   GetMem(BitmapInfo, HeaderSize + 12 + 256 * sizeof(TRGBQuad));   with BitmapInfo^ do   try     try       if OS2Format then  // convert OS2 DIB to Win DIB       begin         Read(Pointer(Longint(@OS2Header) + sizeof(HeaderSize))^,           sizeof(OS2Header) - sizeof(HeaderSize));         FillChar(bmiHeader, sizeof(bmiHeader), 0);         with bmiHeader, OS2Header do         begin           biWidth := bcWidth;           biHeight := bcHeight;           biPlanes := bcPlanes;           biBitCount := bcBitCount;         end;         Dec(ImageSize, sizeof(OS2Header));       end       else       begin // support bitmap headers larger than TBitmapInfoHeader         Read(Pointer(Longint(BitmapInfo) + sizeof(HeaderSize))^,           HeaderSize - sizeof(HeaderSize));         Dec(ImageSize, HeaderSize);           if (bmiHeader.biCompression <> BI_BITFIELDS) and           (bmiHeader.biCompression <> BI_RGB) then         begin // Preserve funky non-DIB data (like RLE) until modified           // source stream could be unidirectional.  don't reverse seek           if bmf = nil then           begin             FillChar(vbmf, sizeof(vbmf), 0);             vbmf.bfType := $4D42;             vbmf.bfSize := ImageSize + Cardinal(HeaderSize);             bmf := @vbmf;           end;         end;       end;         with bmiHeader do       begin         biSize := HeaderSize;         ColorTable := Pointer(Longint(BitmapInfo) + HeaderSize);           { check number of planes. DIBs must be 1 color plane (packed pixels) }         if biPlanes <> 1 then exit;//InvalidBitmap;           // 3 DWORD color element bit masks (ie 888 or 565) can precede colors         // TBitmapInfoHeader sucessors include these masks in the headersize         if (HeaderSize = sizeof(TBitmapInfoHeader)) and           ((biBitCount = 16) or (biBitCount = 32)) and           (biCompression = BI_BITFIELDS) then         begin           Read(ColorTable^, 3 * sizeof(DWORD));           Inc(Longint(ColorTable), 3 * sizeof(DWORD));           Dec(ImageSize, 3 * sizeof(DWORD));         end;           // Read the color palette         if biClrUsed = 0 then           biClrUsed := GetDInColors(biBitCount);         Read(ColorTable^, biClrUsed * DIBPalSizes[OS2Format]);         Dec(ImageSize, biClrUsed * DIBPalSizes[OS2Format]);           // biSizeImage can be zero. If zero, compute the size.         if biSizeImage = 0 then            // top-down DIBs have negative height           biSizeImage := BytesPerScanLine(biWidth, biBitCount, 32) * Abs(biHeight);           if biSizeImage < ImageSize then ImageSize := biSizeImage;       end;         { convert OS2 color table to DIB color table }       if OS2Format then RGBTripleToQuad(ColorTable^);         DC := GetDC(0);       try         if ((bmiHeader.biCompression <> BI_RGB) and           (bmiHeader.biCompression <> BI_BITFIELDS)) or DDBsOnly then         begin           MemDC := 0;           GetMem(BitsMem, ImageSize);           try             Read(BitsMem^, ImageSize);             MemDC := CreateCompatibleDC(DC);             OldBMP := SelectObject(MemDC, CreateCompatibleBitmap(DC, 1, 1));             OldPal := 0;             if bmiHeader.biClrUsed > 0 then             begin               Pal := PaletteFromDIBColorTable(0, ColorTable, bmiHeader.biClrUsed);               OldPal := SelectPalette(MemDC, Pal, False);               RealizePalette(MemDC);             end;               try               BMHandle := CreateDIBitmap(MemDC, BitmapInfo^.bmiHeader, CBM_INIT, BitsMem,                 BitmapInfo^, DIB_RGB_COLORS);               if (BMHandle = 0) then                 if GetLastError = 0 then exit{InvalidBitmap} else RaiseLastOSError;             finally               if OldPal <> 0 then                 SelectPalette(MemDC, OldPal, True);               DeleteObject(SelectObject(MemDC, OldBMP));             end;           finally             if MemDC <> 0 then DeleteDC(MemDC);             FreeMem(BitsMem);           end;         end         else         begin           BMHandle := CreateDIBSection(DC, BitmapInfo^, DIB_RGB_COLORS, BitsMem, 0, 0);           if (BMHandle = 0) or (BitsMem = nil) then             if GetLastError = 0 then exit{InvalidBitmap} else RaiseLastOSError;             try             Read(BitsMem^, ImageSize);           except             DeleteObject(BMHandle);             raise;           end;         end;       finally         ReleaseDC(0, DC);       end;       // Hi-color DIBs don't preserve color table, so create palette now       if (bmiHeader.biBitCount > 8) and (bmiHeader.biClrUsed > 0) and (Pal = 0)then         Pal := PaletteFromDIBColorTable(0, ColorTable, bmiHeader.biClrUsed);         FillChar(DIB, sizeof(DIB), 0);       GetObject(BMHandle, Sizeof(DIB), @DIB);       // GetObject / CreateDIBSection don't preserve these info values       DIB.dsBmih.biXPelsPerMeter := bmiHeader.biXPelsPerMeter;       DIB.dsBmih.biYPelsPerMeter := bmiHeader.biYPelsPerMeter;       DIB.dsBmih.biClrUsed := bmiHeader.biClrUsed;       DIB.dsBmih.biClrImportant := bmiHeader.biClrImportant;     except       raise;     end;   finally     FreeMem(BitmapInfo);   end; end;

в результате получаю BMHandle, Pal, DIB, OS2Format но дальше ничего апишного на ум не приходит, не знаю как впихнуть их в нужный хендл, хотя может просто туплю, помогите)