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- //-----------------------------------------------------------------------------
- // File: DDutil.cpp
- //
- // Desc: Routines for loading bitmap and palettes from resources
- //
- // Copyright (C) 1995-2001 Microsoft Corporation. All Rights Reserved.
- //-----------------------------------------------------------------------------
- #undef WIN32_LEAN_AND_MEAN
- #define WIN32_LEAN_AND_MEAN
- #include <ddraw.h>
- #include "ddutil.h"
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DDUtil_CopyBitmap()
- // Desc: Draw a bitmap into a DirectDrawSurface
- //-----------------------------------------------------------------------------
- HRESULT DDUtil_CopyBitmap( LPDIRECTDRAWSURFACE pdds, HBITMAP hbm, int x, int y,
- int dx, int dy )
- {
- HDC hdcImage;
- HDC hdc;
- BITMAP bm;
- DDSURFACEDESC ddsd;
- HRESULT hr;
-
- if( hbm == NULL || pdds == NULL )
- return E_FAIL;
-
- // Make sure this surface is restored.
- pdds->Restore();
-
- // Select bitmap into a memoryDC so we can use it.
- hdcImage = CreateCompatibleDC(NULL);
- if( !hdcImage )
- {
- OutputDebugString( TEXT("CreateCompatibleDC() failed\n") );
- return E_FAIL;
- }
- SelectObject( hdcImage, hbm );
-
- // Get size of the bitmap
- GetObject( hbm, sizeof(bm), &bm ); // get size of bitmap
- dx = dx == 0 ? bm.bmWidth : dx; // use the passed size, unless zero
- dy = dy == 0 ? bm.bmHeight : dy;
-
- // Gt size of surface.
- ddsd.dwSize = sizeof(ddsd);
- ddsd.dwFlags = DDSD_HEIGHT | DDSD_WIDTH;
- pdds->GetSurfaceDesc(&ddsd);
-
- if( SUCCEEDED( hr = pdds->GetDC(&hdc) ) )
- {
- StretchBlt( hdc, 0, 0, ddsd.dwWidth, ddsd.dwHeight, hdcImage,
- x, y, dx, dy, SRCCOPY);
- pdds->ReleaseDC( hdc );
- }
-
- DeleteDC( hdcImage );
-
- return hr;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DDUtil_LoadPalette()
- // Desc: Create a DirectDraw palette object from a bitmap resoure
- // If the resource does not exist or NULL is passed create a
- // default 332 palette.
- //-----------------------------------------------------------------------------
- LPDIRECTDRAWPALETTE DDUtil_LoadPalette( LPDIRECTDRAW pDD, TCHAR* strBitmap )
- {
- LPDIRECTDRAWPALETTE pddPalette;
- int i;
- int n;
- HANDLE fh;
- HRSRC h;
- LPBITMAPINFOHEADER lpbi;
- PALETTEENTRY ape[256];
- RGBQUAD* prgb;
- DWORD dwRead;
-
- // Build a 332 palette as the default.
- for( i=0; i<256; i++ )
- {
- ape[i].peRed = (BYTE)(((i >> 5) & 0x07) * 255 / 7);
- ape[i].peGreen = (BYTE)(((i >> 2) & 0x07) * 255 / 7);
- ape[i].peBlue = (BYTE)(((i >> 0) & 0x03) * 255 / 3);
- ape[i].peFlags = (BYTE)0;
- }
-
- // Gt a pointer to the bitmap resource.
- if( strBitmap && ( h = FindResource( NULL, strBitmap, RT_BITMAP ) ) )
- {
- lpbi = (LPBITMAPINFOHEADER)LockResource( LoadResource( NULL, h ) );
- if( NULL == lpbi )
- OutputDebugString(TEXT("lock resource failed\n"));
- prgb = (RGBQUAD*)((BYTE*)lpbi + lpbi->biSize);
-
- if (lpbi == NULL || lpbi->biSize < sizeof(BITMAPINFOHEADER))
- n = 0;
- else if (lpbi->biBitCount > 8)
- n = 0;
- else if (lpbi->biClrUsed == 0)
- n = 1 << lpbi->biBitCount;
- else
- n = lpbi->biClrUsed;
-
- // A DIB color table has its colors stored BGR not RGB, so flip them
- for(i=0; i<n; i++ )
- {
- ape[i].peRed = prgb[i].rgbRed;
- ape[i].peGreen = prgb[i].rgbGreen;
- ape[i].peBlue = prgb[i].rgbBlue;
- ape[i].peFlags = 0;
- }
- }
- else if( strBitmap && ( fh = CreateFile( strBitmap, GENERIC_READ,
- FILE_SHARE_READ, NULL, OPEN_EXISTING,
- FILE_ATTRIBUTE_NORMAL, NULL ) ) != INVALID_HANDLE_VALUE )
- {
- BITMAPFILEHEADER bf;
- BITMAPINFOHEADER bi;
-
- ReadFile( fh, &bf, sizeof(bf), &dwRead, NULL );
- ReadFile( fh, &bi, sizeof(bi), &dwRead, NULL );
- ReadFile( fh, ape, sizeof(ape), &dwRead, NULL );
- CloseHandle( fh );
-
- if( bi.biSize != sizeof(BITMAPINFOHEADER) )
- n = 0;
- else if( bi.biBitCount > 8 )
- n = 0;
- else if( bi.biClrUsed == 0 )
- n = 1 << bi.biBitCount;
- else
- n = bi.biClrUsed;
-
- // A DIB color table has its colors stored BGR not RGB so flip them
- for(i=0; i<n; i++ )
- {
- BYTE r = ape[i].peRed;
- ape[i].peRed = ape[i].peBlue;
- ape[i].peBlue = r;
- }
- }
-
- pDD->CreatePalette( DDPCAPS_8BIT, ape, &pddPalette, NULL );
-
- return pddPalette;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DDUtil_ColorMatch()
- // Desc: Convert a RGB color to a pysical color. We do this by leting GDI
- // SetPixel() do the color matching.
- //-----------------------------------------------------------------------------
- DWORD DDUtil_ColorMatch( LPDIRECTDRAWSURFACE pdds, COLORREF rgb )
- {
- DDSURFACEDESC ddsd;
- COLORREF rgbT;
- HDC hdc;
- DWORD dw = CLR_INVALID;
- HRESULT hr;
-
- // Wse GDI SetPixel to color match for us
- if( rgb != CLR_INVALID && SUCCEEDED( pdds->GetDC(&hdc) ) )
- {
- rgbT = GetPixel( hdc, 0, 0 ); // Save current pixel value
- SetPixel( hdc, 0, 0, rgb ); // Set our value
- pdds->ReleaseDC( hdc );
- }
-
- // Now lock the surface so we can read back the converted color
- ddsd.dwSize = sizeof(ddsd);
- while( ( hr = pdds->Lock( NULL, &ddsd, 0, NULL ) ) == DDERR_WASSTILLDRAWING )
- {}
-
- if( SUCCEEDED(hr) )
- {
- dw = *(DWORD *)ddsd.lpSurface; // get DWORD
- dw &= (1 << ddsd.ddpfPixelFormat.dwRGBBitCount)-1; // mask it to bpp
- pdds->Unlock(NULL);
- }
-
- // Now put the color that was there back.
- if( rgb != CLR_INVALID && SUCCEEDED( pdds->GetDC(&hdc) ) )
- {
- SetPixel( hdc, 0, 0, rgbT );
- pdds->ReleaseDC( hdc );
- }
-
- return dw;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DDUtil_SetColorKey()
- // Desc: Set a color key for a surface, given a RGB. If you pass CLR_INVALID as
- // the color key, the pixel in the upper-left corner will be used.
- //-----------------------------------------------------------------------------
- HRESULT DDUtil_SetColorKey( LPDIRECTDRAWSURFACE pdds, COLORREF rgb )
- {
- DDCOLORKEY ddck;
- ddck.dwColorSpaceLowValue = DDUtil_ColorMatch( pdds, rgb );
- ddck.dwColorSpaceHighValue = ddck.dwColorSpaceLowValue;
-
- return pdds->SetColorKey( DDCKEY_SRCBLT, &ddck );
- }
-
-
-
-