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HRESULT WINAPI DXColorFromBSTR( BSTR Color, DWORD *pdwColor );
typedef struct _COLORVALUE_PAIR{ const CHAR *szName; DWORD dwValue;} COLORVALUE_PAIR;
const COLORVALUE_PAIRrgColorNames[] ={ { ("aliceblue"), 0xfff0f8ff }, { ("antiquewhite"), 0xfffaebd7 }, { ("aqua"), 0xff00ffff }, { ("aquamarine"), 0xff7fffd4 }, { ("azure"), 0xfff0ffff }, { ("beige"), 0xfff5f5dc }, { ("bisque"), 0xffffe4c4 }, { ("black"), 0xff000000 }, { ("blanchedalmond"), 0xffffebcd }, { ("blue"), 0xff0000ff }, { ("blueviolet"), 0xff8a2be2 }, { ("brown"), 0xffa52a2a }, { ("burlywood"), 0xffdeb887 }, { ("cadetblue"), 0xff5f9ea0 }, { ("chartreuse"), 0xff7fff00 }, { ("chocolate"), 0xffd2691e }, { ("coral"), 0xffff7f50 }, { ("cornflowerblue"), 0xff6495ed }, { ("cornsilk"), 0xfffff8dc }, { ("crimson"), 0xffdc143c }, { ("cyan"), 0xff00ffff }, { ("darkblue"), 0xff00008b }, { ("darkcyan"), 0xff008b8b }, { ("darkgoldenrod"), 0xffb8860b }, { ("darkgray"), 0xffa9a9a9 }, { ("darkgreen"), 0xff006400 }, { ("darkkhaki"), 0xffbdb76b }, { ("darkmagenta"), 0xff8b008b }, { ("darkolivegreen"), 0xff556b2f }, { ("darkorange"), 0xffff8c00 }, { ("darkorchid"), 0xff9932cc }, { ("darkred"), 0xff8b0000 }, { ("darksalmon"), 0xffe9967a }, { ("darkseagreen"), 0xff8fbc8f }, { ("darkslateblue"), 0xff483d8b }, { ("darkslategray"), 0xff2f4f4f }, { ("darkturquoise"), 0xff00ced1 }, { ("darkviolet"), 0xff9400d3 }, { ("deeppink"), 0xffff1493 }, { ("deepskyblue"), 0xff00bfff }, { ("dimgray"), 0xff696969 }, { ("dodgerblue"), 0xff1e90ff }, { ("firebrick"), 0xffb22222 }, { ("floralwhite"), 0xfffffaf0 }, { ("forestgreen"), 0xff228b22 }, { ("fuchsia"), 0xffff00ff }, { ("gainsboro"), 0xffdcdcdc }, { ("ghostwhite"), 0xfff8f8ff }, { ("gold"), 0xffffd700 }, { ("goldenrod"), 0xffdaa520 }, { ("gray"), 0xff808080 }, { ("green"), 0xff008000 }, { ("greenyellow"), 0xffadff2f }, { ("honeydew"), 0xfff0fff0 }, { ("hotpink"), 0xffff69b4 }, { ("indianred"), 0xffcd5c5c }, { ("indigo"), 0xff4b0082 }, { ("ivory"), 0xfffffff0 }, { ("khaki"), 0xfff0e68c }, { ("lavender"), 0xffe6e6fa }, { ("lavenderblush"), 0xfffff0f5 }, { ("lawngreen"), 0xff7cfc00 }, { ("lemonchiffon"), 0xfffffacd }, { ("lightblue"), 0xffadd8e6 }, { ("lightcoral"), 0xfff08080 }, { ("lightcyan"), 0xffe0ffff }, { ("lightgoldenrodyellow"), 0xfffafad2 }, { ("lightgreen"), 0xff90ee90 }, { ("lightgrey"), 0xffd3d3d3 }, { ("lightpink"), 0xffffb6c1 }, { ("lightsalmon"), 0xffffa07a }, { ("lightseagreen"), 0xff20b2aa }, { ("lightskyblue"), 0xff87cefa }, { ("lightslategray"), 0xff778899 }, { ("lightsteelblue"), 0xffb0c4de }, { ("lightyellow"), 0xffffffe0 }, { ("lime"), 0xff00ff00 }, { ("limegreen"), 0xff32cd32 }, { ("linen"), 0xfffaf0e6 }, { ("magenta"), 0xffff00ff }, { ("maroon"), 0xff800000 }, { ("mediumaquamarine"), 0xff66cdaa }, { ("mediumblue"), 0xff0000cd }, { ("mediumorchid"), 0xffba55d3 }, { ("mediumpurple"), 0xff9370db }, { ("mediumseagreen"), 0xff3cb371 }, { ("mediumslateblue"), 0xff7b68ee }, { ("mediumspringgreen"), 0xff00fa9a }, { ("mediumturquoise"), 0xff48d1cc }, { ("mediumvioletred"), 0xffc71585 }, { ("midnightblue"), 0xff191970 }, { ("mintcream"), 0xfff5fffa }, { ("mistyrose"), 0xffffe4e1 }, { ("moccasin"), 0xffffe4b5 }, { ("navajowhite"), 0xffffdead }, { ("navy"), 0xff000080 }, { ("oldlace"), 0xfffdf5e6 }, { ("olive"), 0xff808000 }, { ("olivedrab"), 0xff6b8e23 }, { ("orange"), 0xffffa500 }, { ("orangered"), 0xffff4500 }, { ("orchid"), 0xffda70d6 }, { ("palegoldenrod"), 0xffeee8aa }, { ("palegreen"), 0xff98fb98 }, { ("paleturquoise"), 0xffafeeee }, { ("palevioletred"), 0xffdb7093 }, { ("papayawhip"), 0xffffefd5 }, { ("peachpuff"), 0xffffdab9 }, { ("peru"), 0xffcd853f }, { ("pink"), 0xffffc0cb }, { ("plum"), 0xffdda0dd }, { ("powderblue"), 0xffb0e0e6 }, { ("purple"), 0xff800080 }, { ("red"), 0xffff0000 }, { ("rosybrown"), 0xffbc8f8f }, { ("royalblue"), 0xff4169e1 }, { ("saddlebrown"), 0xff8b4513 }, { ("salmon"), 0xfffa8072 }, { ("sandybrown"), 0xfff4a460 }, { ("seagreen"), 0xff2e8b57 }, { ("seashell"), 0xfffff5ee }, { ("sienna"), 0xffa0522d }, { ("silver"), 0xffc0c0c0 }, { ("skyblue"), 0xff87ceeb }, { ("slateblue"), 0xff6a5acd }, { ("slategray"), 0xff708090 }, { ("snow"), 0xfffffafa }, { ("springgreen"), 0xff00ff7f }, { ("steelblue"), 0xff4682b4 }, { ("tan"), 0xffd2b48c }, { ("teal"), 0xff008080 }, { ("thistle"), 0xffd8bfd8 }, { ("tomato"), 0xffff6347 }, { ("turquoise"), 0xff40e0d0 }, { ("violet"), 0xffee82ee }, { ("wheat"), 0xfff5deb3 }, { ("white"), 0xffffffff }, { ("whitesmoke"), 0xfff5f5f5 }, { ("yellow"), 0xffffff00 }, { ("yellowgreen"), 0xff9acd32 }
}; // rgColorNames[]
#define SIZE_OF_COLOR_TABLE (sizeof(rgColorNames) / sizeof(COLORVALUE_PAIR))
const COLORVALUE_PAIR rgSystemColorNames[] ={ { ("activeborder"), COLOR_ACTIVEBORDER}, // Active window border.
{ ("activecaption"), COLOR_ACTIVECAPTION}, // Active window caption.
{ ("appworkspace"), COLOR_APPWORKSPACE}, // Background color of multiple document interface (MDI) applications.
{ ("background"), COLOR_BACKGROUND}, // Desktop background.
{ ("buttonface"), COLOR_BTNFACE}, // Face color for three-dimensional display elements.
{ ("buttonhighlight"), COLOR_BTNHIGHLIGHT}, // Dark shadow for three-dimensional display elements.
{ ("buttonshadow"), COLOR_BTNSHADOW}, // Shadow color for three-dimensional display elements (for edges facing away from the light source).
{ ("buttontext"), COLOR_BTNTEXT}, // Text on push buttons.
{ ("captiontext"), COLOR_CAPTIONTEXT}, // Text in caption, size box, and scroll bar arrow box.
{ ("graytext"), COLOR_GRAYTEXT}, // Grayed (disabled) text. This color is set to 0 if the current display driver does not support a solid gray color.
{ ("highlight"), COLOR_HIGHLIGHT}, // Item(s) selected in a control.
{ ("highlighttext"), COLOR_HIGHLIGHTTEXT}, // Text of item(s) selected in a control.
{ ("inactiveborder"), COLOR_INACTIVEBORDER}, // Inactive window border.
{ ("inactivecaption"), COLOR_INACTIVECAPTION}, // Inactive window caption.
{ ("inactivecaptiontext"),COLOR_INACTIVECAPTIONTEXT}, // Color of text in an inactive caption.
{ ("infobackground"), COLOR_INFOBK}, // Background color for tooltip controls.
{ ("infotext"), COLOR_INFOTEXT}, // Text color for tooltip controls.
{ ("menu"), COLOR_MENU}, // Menu background.
{ ("menutext"), COLOR_MENUTEXT}, // Text in menus.
{ ("scrollbar"), COLOR_SCROLLBAR}, // Scroll bar gray area.
{ ("threeddarkshadow"), COLOR_3DDKSHADOW }, // Dark shadow for three-dimensional display elements.
{ ("threedface"), COLOR_3DFACE}, { ("threedhighlight"), COLOR_3DHIGHLIGHT}, // Highlight color for three-dimensional display elements (for edges facing the light source.)
{ ("threedlightshadow"), COLOR_3DLIGHT}, // Light color for three-dimensional display elements (for edges facing the light source.)
{ ("threedshadow"), COLOR_3DSHADOW}, // Dark shadow for three-dimensional display elements.
{ ("window"), COLOR_WINDOW}, // Window background.
{ ("windowframe"), COLOR_WINDOWFRAME}, // Window frame.
{ ("windowtext"), COLOR_WINDOWTEXT}, // Text in windows.
}; // rgSystemColorNames[]
#define SIZE_OF_SYSTEM_COLOR_TABLE (sizeof(rgSystemColorNames) / sizeof(COLORVALUE_PAIR))
//
// Used by DXColorFromBSTR to parse the hex string.
//
inline HRESULT _HexStrToDWORD( char * pch, DWORD * pdwColor ){
HRESULT hr = S_OK; short hexVals[8]; int numVals; int i; DWORD dwmult;
if( !pch || !pdwColor ) { hr = E_FAIL; } else { //--- parse input string
numVals = 0; while( *pch && numVals < 8 ) { if( *pch >= '0' && *pch <= '9' ) { hexVals[numVals++] = *pch++ - '0'; } else if( *pch >= 'a' && *pch <= 'f' ) { hexVals[numVals++] = *pch++ - 'a' + 10; } else if( *pch >= 'A' && *pch <= 'F' ) { hexVals[numVals++] = *pch++ - 'A' + 10; } else { break; } }
if( numVals < 6 ) { hr = E_FAIL; } else { //--- if we were passed 7 hex digits, only use the first 6
if( numVals == 7 ) { numVals = 6; }
//--- initialize multiplier
dwmult = 1; *pdwColor = 0;
//--- multiply hexVals by 16^i
for( i = 0; i < numVals; i++ ) { *pdwColor += (hexVals[numVals-(i+1)]*dwmult); dwmult <<= 4; } } } return hr;}
//
// Used by DXColorFromBSTR to convert a string to lower case
//
inline void StringToLowerCase( CHAR * pstrKey ){ if( pstrKey ) { while( *pstrKey ) { if( *pstrKey >= 'A' && *pstrKey <= 'Z' ) { *pstrKey = 'a' + *pstrKey - 'A'; } pstrKey++; } }}
inline HRESULT WINAPI DXColorFromBSTR( BSTR Color, DWORD *pdwColor ){ HRESULT hr = S_OK; // validate arguments
int strLen = wcslen(Color); if( strLen < 3 || DXIsBadReadPtr( Color, strLen ) || DXIsBadWritePtr( pdwColor, sizeof(*pdwColor) ) ) { hr = E_INVALIDARG; } else { //--- first check for #AARRGGBB and #RRGGBB strings
if( Color[0] == L'#' ) { CHAR ch[11] = "0xffffffff"; if( strLen > 9 ) strLen = 9; if( strLen >= 7 ) { WideCharToMultiByte( CP_ACP, NULL, &Color[1], strLen-1, &ch[11-strLen], strLen, NULL, NULL ); hr = _HexStrToDWORD( &ch[2], pdwColor); } else { hr = E_FAIL; } } else { //--- convert the string to lower case
LPSTR pstrKey = (LPSTR) alloca((strLen + 1) * sizeof(CHAR)); WideCharToMultiByte( CP_ACP, NULL, Color, strLen+1, pstrKey, strLen+1, NULL, NULL ); StringToLowerCase( pstrKey );
//--- search the string table using a binary search
int nFirst = 0; int nLast = SIZE_OF_COLOR_TABLE - 1; int nCur, nCmp; bool bFound = false; while( (nFirst <= nLast) && !bFound ) { nCur = (nFirst + nLast) / 2; nCmp = strcmp( rgColorNames[nCur].szName, pstrKey ); if( nCmp < 0 ) { nFirst = nCur + 1; } else if( nCmp > 0 ) { nLast = nCur - 1; } else { bFound = true; *pdwColor = rgColorNames[nCur].dwValue; } }
// String not in regular color table, try the system color table.
if (!bFound) { nFirst = 0; nLast = SIZE_OF_SYSTEM_COLOR_TABLE - 1;
while ((nFirst <= nLast) && !bFound) { nCur = (nFirst + nLast) / 2; nCmp = strcmp(rgSystemColorNames[nCur].szName, pstrKey);
if (nCmp < 0) { nFirst = nCur + 1; } else if (nCmp > 0) { nLast = nCur - 1; } else { bFound = true; *pdwColor = ::GetSysColor((int)rgSystemColorNames[nCur].dwValue); *pdwColor |= 0xFF000000; } }
// String not found in regular or system color table.
if (!bFound) { hr = E_FAIL; } } }
} return hr;}
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