X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/40989e46b86777dd211faeb3e5d2366cdcc6d8cd..87f0b1323b7ac77f02133b836c8dfee63b0fd387:/src/common/colourcmn.cpp diff --git a/src/common/colourcmn.cpp b/src/common/colourcmn.cpp index 5770961fb0..70e4a1d9ca 100644 --- a/src/common/colourcmn.cpp +++ b/src/common/colourcmn.cpp @@ -19,35 +19,156 @@ #include "wx/colour.h" +#ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/utils.h" + #include "wx/gdicmn.h" + #include "wx/wxcrtvararg.h" +#endif + +#if wxUSE_VARIANT +IMPLEMENT_VARIANT_OBJECT_EXPORTED(wxColour,WXDLLEXPORT) +#endif + + +// ---------------------------------------------------------------------------- +// XTI +// ---------------------------------------------------------------------------- + +#if wxUSE_EXTENDED_RTTI + +#include + +template<> void wxStringReadValue(const wxString &s, wxColour &data ) +{ + if ( !data.Set(s) ) + { + wxLogError(_("String To Colour : Incorrect colour specification : %s"), + s.c_str() ); + data = wxNullColour; + } +} + +template<> void wxStringWriteValue(wxString &s, const wxColour &data ) +{ + s = data.GetAsString(wxC2S_HTML_SYNTAX); +} + +wxTO_STRING_IMP( wxColour ) +wxFROM_STRING_IMP( wxColour ) + +wxIMPLEMENT_DYNAMIC_CLASS_WITH_COPY_AND_STREAMERS_XTI( wxColour, wxObject, \ + "wx/colour.h", &wxTO_STRING( wxColour ), &wxFROM_STRING( wxColour )) +//WX_IMPLEMENT_ANY_VALUE_TYPE(wxAnyValueTypeImpl) +wxBEGIN_PROPERTIES_TABLE(wxColour) +wxREADONLY_PROPERTY( Red, unsigned char, Red, wxEMPTY_PARAMETER_VALUE, \ + 0 /*flags*/, wxT("Helpstring"), wxT("group")) +wxREADONLY_PROPERTY( Green, unsigned char, Green, wxEMPTY_PARAMETER_VALUE, \ + 0 /*flags*/, wxT("Helpstring"), wxT("group")) +wxREADONLY_PROPERTY( Blue, unsigned char, Blue, wxEMPTY_PARAMETER_VALUE, \ + 0 /*flags*/, wxT("Helpstring"), wxT("group")) +wxEND_PROPERTIES_TABLE() +wxDIRECT_CONSTRUCTOR_3( wxColour, unsigned char, Red, \ + unsigned char, Green, unsigned char, Blue ) + +wxEMPTY_HANDLERS_TABLE(wxColour) +#else + +#if wxCOLOUR_IS_GDIOBJECT +wxIMPLEMENT_DYNAMIC_CLASS(wxColour, wxGDIObject) +#else +wxIMPLEMENT_DYNAMIC_CLASS(wxColour, wxObject) +#endif + +#endif // ============================================================================ // wxString <-> wxColour conversions // ============================================================================ -bool wxColourBase::FromString(const wxChar *str) +bool wxColourBase::FromString(const wxString& str) { - if ( str == NULL || str[0] == wxT('\0')) + if ( str.empty() ) return false; // invalid or empty string - if ( wxStrncmp(str, wxT("RGB"), 3) == 0 || - wxStrncmp(str, wxT("rgb"), 3) == 0 ) + if ( wxStrnicmp(str, wxT("RGB"), 3) == 0 ) { - // RGB specification CSS-like - int red, green, blue; - if (wxSscanf(&str[3], wxT("(%d, %d, %d)"), &red, &green, &blue) != 3) - return false; + // CSS-like RGB specification + // according to http://www.w3.org/TR/css3-color/#colorunits + // values outside 0-255 range are allowed but should be clipped + int red, green, blue, + alpha = wxALPHA_OPAQUE; + if ( str.length() > 3 && (str[3] == wxT('a') || str[3] == wxT('A')) ) + { + // We can't use sscanf() for the alpha value as sscanf() uses the + // current locale while the floating point numbers in CSS always + // use point as decimal separator, regardless of locale. So parse + // the tail of the string manually by putting it in a buffer and + // using wxString::ToCDouble() below. Notice that we can't use "%s" + // for this as it stops at white space and we need "%c" to avoid + // this and really get all the rest of the string into the buffer. + + const unsigned len = str.length(); // always big enough + wxCharBuffer alphaBuf(len); + char * const alphaPtr = alphaBuf.data(); + + for ( unsigned n = 0; n < len; n++ ) + alphaPtr[n] = '\0'; + + // Construct the format string which ensures that the last argument + // receives all the rest of the string. + wxString formatStr; + formatStr << wxS("( %d , %d , %d , %") << len << 'c'; + + // Notice that we use sscanf() here because if the string is not + // ASCII it can't represent a valid RGB colour specification anyhow + // and like this we can be sure that %c corresponds to "char *" + // while with wxSscanf() it depends on the type of the string + // passed as first argument: if it is a wide string, then %c + // expects "wchar_t *" matching parameter under MSW for example. + if ( sscanf(str.c_str() + 4, + formatStr.mb_str(), + &red, &green, &blue, alphaPtr) != 4 ) + return false; + + // Notice that we must explicitly specify the length to get rid of + // trailing NULs. + wxString alphaStr(alphaPtr, wxStrlen(alphaPtr)); + if ( alphaStr.empty() || alphaStr.Last() != ')' ) + return false; - Set((unsigned char)red, (unsigned char)green, (unsigned char)blue); + alphaStr.RemoveLast(); + alphaStr.Trim(); + + double a; + if ( !alphaStr.ToCDouble(&a) ) + return false; + + alpha = wxRound(a * 255); + } + else // no 'a' following "rgb" + { + if ( wxSscanf(str.wx_str() + 3, wxT("( %d , %d , %d )"), + &red, &green, &blue) != 3 ) + return false; + } + + Set((unsigned char)wxClip(red, 0, 255), + (unsigned char)wxClip(green, 0, 255), + (unsigned char)wxClip(blue, 0, 255), + (unsigned char)wxClip(alpha, 0, 255)); } else if ( str[0] == wxT('#') && wxStrlen(str) == 7 ) { // hexadecimal prefixed with # (HTML syntax) unsigned long tmp; - if (wxSscanf(&str[1], wxT("%lX"), &tmp) != 1) + if (wxSscanf(str.wx_str() + 1, wxT("%lx"), &tmp) != 1) return false; - Set(tmp); // set from packed long + Set((unsigned char)(tmp >> 16), + (unsigned char)(tmp >> 8), + (unsigned char)tmp); } else if (wxTheColourDatabase) // a colour name ? { @@ -56,10 +177,13 @@ bool wxColourBase::FromString(const wxChar *str) // because this place can be called from constructor // and 'this' could not be available yet wxColour clr = wxTheColourDatabase->Find(str); - Set((unsigned char)clr.Red(), (unsigned char)clr.Green(), (unsigned char)clr.Blue()); + if (clr.IsOk()) + Set((unsigned char)clr.Red(), + (unsigned char)clr.Green(), + (unsigned char)clr.Blue()); } - if (Ok()) + if (IsOk()) return true; wxLogDebug(wxT("wxColour::Set - couldn't set to colour string '%s'"), str); @@ -70,30 +194,186 @@ wxString wxColourBase::GetAsString(long flags) const { wxString colName; - if (flags & wxC2S_NAME) - colName = wxTheColourDatabase->FindName((const wxColour &)(*this)).MakeLower(); + const bool isOpaque = Alpha() == wxALPHA_OPAQUE; - if ( colName.empty() && (flags & wxC2S_CSS_SYNTAX) ) + // we can't use the name format if the colour is not opaque as the alpha + // information would be lost + if ( (flags & wxC2S_NAME) && isOpaque ) { - // no name for this colour; return it in CSS syntax - colName.Printf(wxT("rgb(%d, %d, %d)"), - Red(), Green(), Blue()); + colName = wxTheColourDatabase->FindName( + static_cast(*this)).MakeLower(); } - else if ( colName.empty() && (flags & wxC2S_HTML_SYNTAX) ) + + if ( colName.empty() ) { - // no name for this colour; return it in HTML syntax - colName.Printf(wxT("#%02X%02X%02X"), - Red(), Green(), Blue()); + const int red = Red(), + blue = Blue(), + green = Green(); + + if ( flags & wxC2S_CSS_SYNTAX ) + { + // no name for this colour; return it in CSS syntax + if ( isOpaque ) + { + colName.Printf(wxT("rgb(%d, %d, %d)"), red, green, blue); + } + else // use rgba() form + { + colName.Printf(wxT("rgba(%d, %d, %d, %s)"), + red, green, blue, + wxString::FromCDouble(Alpha() / 255., 3)); + } + } + else if ( flags & wxC2S_HTML_SYNTAX ) + { + wxASSERT_MSG( isOpaque, "alpha is lost in HTML syntax" ); + + // no name for this colour; return it in HTML syntax + colName.Printf(wxT("#%02X%02X%02X"), red, green, blue); + } } - // this function always returns a non-empty string + // this function should alway returns a non-empty string wxASSERT_MSG(!colName.empty(), wxT("Invalid wxColour -> wxString conversion flags")); return colName; } +// static +void wxColourBase::MakeMono(unsigned char* r, unsigned char* g, unsigned char* b, + bool on) +{ + *r = *g = *b = on ? 255 : 0; +} + +// static +void wxColourBase::MakeGrey(unsigned char* r, unsigned char* g, unsigned char* b + /*, unsigned char brightness */ + ) +{ + *r = *g = *b = (wxByte)(((*b)*117UL + (*g)*601UL + (*r)*306UL) >> 10); +} + +// static +void wxColourBase::MakeGrey(unsigned char* r, unsigned char* g, unsigned char* b, + double weight_r, double weight_g, double weight_b) +{ + double luma = (*r) * weight_r + (*g) * weight_g + (*b) * weight_b; + *r = *g = *b = (wxByte)wxRound(luma); +} + +// static +void wxColourBase::MakeDisabled(unsigned char* r, unsigned char* g, unsigned char* b, + unsigned char brightness) +{ + //MakeGrey(r, g, b, brightness); // grey no-blend version + *r = AlphaBlend(*r, brightness, 0.4); + *g = AlphaBlend(*g, brightness, 0.4); + *b = AlphaBlend(*b, brightness, 0.4); +} + +wxColour& wxColourBase::MakeDisabled(unsigned char brightness) +{ + unsigned char r = Red(), + g = Green(), + b = Blue(); + MakeDisabled(&r, &g, &b, brightness); + Set(r, g, b, Alpha()); + return static_cast(*this); +} + +// AlphaBlend is used by ChangeLightness and MakeDisabled + +// static +unsigned char wxColourBase::AlphaBlend(unsigned char fg, unsigned char bg, + double alpha) +{ + double result = bg + (alpha * (fg - bg)); + result = wxMax(result, 0.0); + result = wxMin(result, 255.0); + return (unsigned char)result; +} + +// ChangeLightness() is a utility function that simply darkens +// or lightens a color, based on the specified percentage +// ialpha of 0 would be completely black, 100 completely white +// an ialpha of 100 returns the same colour + +// static +void wxColourBase::ChangeLightness(unsigned char* r, unsigned char* g, unsigned char* b, + int ialpha) +{ + if (ialpha == 100) return; + + // ialpha is 0..200 where 0 is completely black + // and 200 is completely white and 100 is the same + // convert that to normal alpha 0.0 - 1.0 + ialpha = wxMax(ialpha, 0); + ialpha = wxMin(ialpha, 200); + double alpha = ((double)(ialpha - 100.0))/100.0; + + unsigned char bg; + if (ialpha > 100) + { + // blend with white + bg = 255; + alpha = 1.0 - alpha; // 0 = transparent fg; 1 = opaque fg + } + else + { + // blend with black + bg = 0; + alpha = 1.0 + alpha; // 0 = transparent fg; 1 = opaque fg + } + + *r = AlphaBlend(*r, bg, alpha); + *g = AlphaBlend(*g, bg, alpha); + *b = AlphaBlend(*b, bg, alpha); +} + +wxColour wxColourBase::ChangeLightness(int ialpha) const +{ + wxByte r = Red(); + wxByte g = Green(); + wxByte b = Blue(); + ChangeLightness(&r, &g, &b, ialpha); + return wxColour(r,g,b); +} + +#if WXWIN_COMPATIBILITY_2_6 + +// static wxColour wxColourBase::CreateByName(const wxString& name) { return wxColour(name); } + +void wxColourBase::InitFromName(const wxString& col) +{ + Set(col); +} + +#endif // WXWIN_COMPATIBILITY_2_6 + +// wxColour <-> wxString utilities, used by wxConfig +wxString wxToString(const wxColourBase& col) +{ + return col.IsOk() ? col.GetAsString(wxC2S_CSS_SYNTAX) + : wxString(); +} + +bool wxFromString(const wxString& str, wxColourBase *col) +{ + wxCHECK_MSG( col, false, wxT("NULL output parameter") ); + + if ( str.empty() ) + { + *col = wxNullColour; + return true; + } + + return col->Set(str); +} + +