Camelot: wxOil/osrndrgn.cpp File Reference

To determine the number of grad fill steps that will be necessary to render the given graduation to a reasonable quality.

04849 {
04850     // Get RGB values of start and end colours...
04851     INT32 StartRed, StartGreen, StartBlue;
04852     Start.GetRGBValue(&StartRed, &StartGreen, &StartBlue);
04853 
04854     INT32 EndRed, EndGreen, EndBlue;
04855     End.GetRGBValue(&EndRed, &EndGreen, &EndBlue);
04856 
04857     // Find maximum difference between colours
04858     INT32 Diff = Abs(StartRed-EndRed);
04859     INT32 Tmp = StartGreen - EndGreen;
04860     Diff = max(Abs(Tmp), Diff);
04861     Tmp = StartBlue - EndBlue;
04862     Diff = max(Abs(Tmp), Diff);
04863 
04864     // Spot colours in a fill coerce the fill to a simple RGB mix
04865     if (Start.GetSpotParent() != NULL || End.GetSpotParent() != NULL)
04866         EffectType = EFFECT_RGB;
04867 
04868     // See if HSV route requires larger number of steps...
04869     if (EffectType == EFFECT_HSV_SHORT || EffectType == EFFECT_HSV_LONG)
04870     {
04871         // Get an HSV context (quite fast - simple array lookup)
04872         ColourContext *pContext = ColourContext::GetGlobalDefault(COLOURMODEL_HSVT);
04873         ERROR3IF(pContext == NULL, "No HSV context?!");
04874 
04875         ColourHSVT StartDef;
04876         pContext->ConvertColour(&Start, (ColourGeneric *) &StartDef);
04877 
04878         ColourHSVT EndDef;
04879         pContext->ConvertColour(&End, (ColourGeneric *) &EndDef);
04880 
04881         // HSV blend! We can go 2 ways, as HSV can 'wrap' from 1.0 back to 0.0
04882         BOOL BlendNormally = TRUE;
04883 
04884         // Calc. the "simple" (non-wrapping) distance between the hues
04885         const double StartHue   = StartDef.Hue.MakeDouble();
04886         const double EndHue     = EndDef.Hue.MakeDouble();
04887 
04888         double SimpleDist = StartHue - EndHue;
04889         if (SimpleDist < 0.0)
04890             SimpleDist = -SimpleDist;
04891 
04892         // Determine whether we do a simple blend, or we have to "wrap"
04893         if (SimpleDist <= 0.5)
04894             BlendNormally = !(EffectType == EFFECT_HSV_LONG);
04895         else
04896             BlendNormally = (EffectType == EFFECT_HSV_LONG);
04897 
04898         // Convert to 9 bit value
04899         INT32 HSVDiff = (INT32) (360.0 * SimpleDist);
04900         if (!BlendNormally)         // Go the long way around
04901             HSVDiff = 360 - HSVDiff;
04902 
04903         if (HSVDiff > Diff)         // Use this if it's larger.
04904             Diff = HSVDiff;
04905     }
04906 
04907     return((Depth >= 24) ? Diff : Diff / 3);    // Decide how many steps to do based on colour depth.
04908 }


Defines
#define	new CAM_DEBUG_NEW
#define	MAX_POLYGONS 256
#define	TEST_MANUAL_LINES 0
#define	LONGEST_SEGMENT 8192
Enumerations
enum	GradFillMethodType { GF_USE_GDICLIPPING, GF_USE_GDIEOR, GF_USE_GAVINCLIPPING }
Functions
	DECLARE_SOURCE ("$Revision: 1571 $")
static INT32	GetDiagonal (const WinRect &Rectangle)
	Like PolyDraw but works on Chicago. Does not work on Win32s. Scope: Protected.
static INT32	ColDifference (DocColour &Start, DocColour &End, INT32 Depth, EFFECTTYPE EffectType)
	To determine the number of grad fill steps that will be necessary to render the given graduation to a reasonable quality.
Variables
static BOOL	WantGDIPalette = TRUE
	Allows the user to determine whether a special palette is used when rendering with GDI. Ingored except on modes that support palettes (e.g. 256 colours). Defaults to 1.
static BOOL	WantBetterLines
	Allows the user to determine whether we let GDI do lines (2) or we do them (1). When we do them we do end caps, mitres etc properly. 0 means let GDI32 do them, but we do them on GDI16. Defaults to 0.
static BOOL	PrintRotatedTextAsPaths = FALSE
	Allows the user to force printing on non-Postscript printers to output all rotated characters as paths instead of using GDI text rendering. Note that "Rotated" means rotated on the physical paper. Defaults to FALSE (0).
BOOL	BodgeRectangles = FALSE
	Set to 1 for video drivers that cannot plot rectangles with line borders correctly e.g. Avance 1.5F in 256 colours. Defaults to 0.
static INT32	GradFillQuality = 1
static DocCoord	ConvPoints [8192]
static PathVerb	ConvVerbs [8192]
const INT32	MAX_FILL_STEPS = 128
const BOOL	USE_GDI_CLIPPING = FALSE

osrndrgn.cpp File Reference

(r1785/r1571)

Defines

Enumerations

Functions

Variables

Define Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation