Author: alg
Date: Tue Oct 2 09:21:47 2012
New Revision: 1392804
URL: http://svn.apache.org/viewvc?rev=1392804&view=rev
Log:
#120957# Added Reginas corrections for gradient colors for linear gradients in
VCL renderers
Patch by: Regina
Review by: alg
Modified:
incubator/ooo/trunk/main/vcl/source/gdi/outdev4.cxx
Modified: incubator/ooo/trunk/main/vcl/source/gdi/outdev4.cxx
URL:
http://svn.apache.org/viewvc/incubator/ooo/trunk/main/vcl/source/gdi/outdev4.cxx?rev=1392804&r1=1392803&r2=1392804&view=diff
==============================================================================
--- incubator/ooo/trunk/main/vcl/source/gdi/outdev4.cxx (original)
+++ incubator/ooo/trunk/main/vcl/source/gdi/outdev4.cxx Tue Oct 2 09:21:47 2012
@@ -170,12 +170,8 @@ void OutputDevice::ImplDrawLinearGradien
const Gradient& rGradient,
sal_Bool bMtf, const PolyPolygon* pClipPolyPoly )
{
- // rotiertes BoundRect ausrechnen
+ // get BoundRect of rotated rectangle
Rectangle aRect = rRect;
- aRect.Left()--;
- aRect.Top()--;
- aRect.Right()++;
- aRect.Bottom()++;
sal_uInt16 nAngle = rGradient.GetAngle() % 3600;
double fAngle = nAngle * F_PI1800;
double fWidth = aRect.GetWidth();
@@ -191,224 +187,205 @@ void OutputDevice::ImplDrawLinearGradien
aRect.Top() -= (long)fDY;
aRect.Bottom() += (long)fDY;
- // Rand berechnen und Rechteck neu setzen
+ sal_Bool bLinear = ( rGradient.GetStyle() == GRADIENT_LINEAR );
+ double fBorder = rGradient.GetBorder() * aRect.GetHeight() /
100.0;
Point aCenter = rRect.Center();
- Rectangle aFullRect = aRect;
- long nBorder = (long)rGradient.GetBorder() *
aRect.GetHeight() / 100;
- sal_Bool bLinear;
+ if ( !bLinear )
+ {
+ fBorder /= 2.0;
+ }
+ Rectangle aMirrorRect = aRect; // used in style axial
+ aMirrorRect.Top() = ( aRect.Top() + aRect.Bottom() ) / 2;
+ if ( !bLinear )
+ {
+ aRect.Bottom() = aMirrorRect.Top();
+ }
- // Rand berechnen und Rechteck neu setzen fuer linearen Farbverlauf
- if ( rGradient.GetStyle() == GRADIENT_LINEAR )
- {
- bLinear = sal_True;
- aRect.Top() += nBorder;
- }
- // Rand berechnen und Rechteck neu setzen fuer axiale Farbverlauf
- else
- {
- bLinear = sal_False;
- nBorder >>= 1;
+ // Intensitaeten von Start- und Endfarbe ggf. aendern
+ long nFactor;
+ Color aStartCol = rGradient.GetStartColor();
+ Color aEndCol = rGradient.GetEndColor();
+ long nStartRed = aStartCol.GetRed();
+ long nStartGreen = aStartCol.GetGreen();
+ long nStartBlue = aStartCol.GetBlue();
+ long nEndRed = aEndCol.GetRed();
+ long nEndGreen = aEndCol.GetGreen();
+ long nEndBlue = aEndCol.GetBlue();
+ nFactor = rGradient.GetStartIntensity();
+ nStartRed = (nStartRed * nFactor) / 100;
+ nStartGreen = (nStartGreen * nFactor) / 100;
+ nStartBlue = (nStartBlue * nFactor) / 100;
+ nFactor = rGradient.GetEndIntensity();
+ nEndRed = (nEndRed * nFactor) / 100;
+ nEndGreen = (nEndGreen * nFactor) / 100;
+ nEndBlue = (nEndBlue * nFactor) / 100;
- aRect.Top() += nBorder;
- aRect.Bottom() -= nBorder;
- }
+ // gradient style axial has exchanged start and end colors
+ if ( !bLinear)
+ {
+ long nTempColor = nStartRed;
+ nStartRed = nEndRed;
+ nEndRed = nTempColor;
+ nTempColor = nStartGreen;
+ nStartGreen = nEndGreen;
+ nEndGreen = nTempColor;
+ nTempColor = nStartBlue;
+ nStartBlue = nEndBlue;
+ nEndBlue = nTempColor;
+ }
- // Top darf nicht groesser als Bottom sein
- aRect.Top() = Min( aRect.Top(), (long)(aRect.Bottom() - 1) );
+ sal_uInt8 nRed;
+ sal_uInt8 nGreen;
+ sal_uInt8 nBlue;
+
+ // Create border
+ Rectangle aBorderRect = aRect;
+ Polygon aPoly( 4 );
+ if (fBorder > 0.0)
+ {
+ nRed = (sal_uInt8)nStartRed;
+ nGreen = (sal_uInt8)nStartGreen;
+ nBlue = (sal_uInt8)nStartBlue;
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaFillColorAction( Color( nRed,
nGreen, nBlue ), sal_True ) );
+ else
+ mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen, nBlue ) );
+ aBorderRect.Bottom() = (long)( aBorderRect.Top() + fBorder );
+ aRect.Top() = aBorderRect.Bottom();
+ aPoly[0] = aBorderRect.TopLeft();
+ aPoly[1] = aBorderRect.TopRight();
+ aPoly[2] = aBorderRect.BottomRight();
+ aPoly[3] = aBorderRect.BottomLeft();
+ aPoly.Rotate( aCenter, nAngle );
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
+ else
+ ImplDrawPolygon( aPoly, pClipPolyPoly );
+ if ( !bLinear)
+ {
+ aBorderRect = aMirrorRect;
+ aBorderRect.Top() = (long) ( aBorderRect.Bottom() - fBorder );
+ aMirrorRect.Bottom() = aBorderRect.Top();
+ aPoly[0] = aBorderRect.TopLeft();
+ aPoly[1] = aBorderRect.TopRight();
+ aPoly[2] = aBorderRect.BottomRight();
+ aPoly[3] = aBorderRect.BottomLeft();
+ aPoly.Rotate( aCenter, nAngle );
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
+ else
+ ImplDrawPolygon( aPoly, pClipPolyPoly );
+ }
+ }
+
+ // calculate step count
+ long nStepCount = rGradient.GetSteps();
+ // generate nStepCount, if not passed
long nMinRect = aRect.GetHeight();
-
- // Intensitaeten von Start- und Endfarbe ggf. aendern und
- // Farbschrittweiten berechnen
- long nFactor;
- Color aStartCol = rGradient.GetStartColor();
- Color aEndCol = rGradient.GetEndColor();
- long nStartRed = aStartCol.GetRed();
- long nStartGreen = aStartCol.GetGreen();
- long nStartBlue = aStartCol.GetBlue();
- long nEndRed = aEndCol.GetRed();
- long nEndGreen = aEndCol.GetGreen();
- long nEndBlue = aEndCol.GetBlue();
- nFactor =
rGradient.GetStartIntensity();
- nStartRed = (nStartRed *
nFactor) / 100;
- nStartGreen = (nStartGreen * nFactor) /
100;
- nStartBlue = (nStartBlue *
nFactor) / 100;
- nFactor =
rGradient.GetEndIntensity();
- nEndRed = (nEndRed *
nFactor) / 100;
- nEndGreen = (nEndGreen * nFactor)
/ 100;
- nEndBlue = (nEndBlue * nFactor)
/ 100;
- long nRedSteps = nEndRed - nStartRed;
- long nGreenSteps = nEndGreen - nStartGreen;
- long nBlueSteps = nEndBlue - nStartBlue;
- long nStepCount = rGradient.GetSteps();
-
- // Bei nicht linearen Farbverlaeufen haben wir nur die halben Steps
- // pro Farbe
- if ( !bLinear )
- {
- nRedSteps <<= 1;
- nGreenSteps <<= 1;
- nBlueSteps <<= 1;
- }
-
- // Anzahl der Schritte berechnen, falls nichts uebergeben wurde
if ( !nStepCount )
{
- long nInc;
-
+ long nInc = 1;
if ( meOutDevType != OUTDEV_PRINTER && !bMtf )
{
nInc = (nMinRect < 50) ? 2 : 4;
}
else
{
- // #105998# Use display-equivalent step size calculation
+ // Use display-equivalent step size calculation
nInc = (nMinRect < 800) ? 10 : 20;
}
-
- if ( !nInc )
- nInc = 1;
-
nStepCount = nMinRect / nInc;
}
- // minimal drei Schritte und maximal die Anzahl der Farbunterschiede
- long nSteps = Max( nStepCount, 2L );
- long nCalcSteps = Abs( nRedSteps );
- long nTempSteps = Abs( nGreenSteps );
- if ( nTempSteps > nCalcSteps )
- nCalcSteps = nTempSteps;
- nTempSteps = Abs( nBlueSteps );
- if ( nTempSteps > nCalcSteps )
- nCalcSteps = nTempSteps;
- if ( nCalcSteps < nSteps )
- nSteps = nCalcSteps;
- if ( !nSteps )
- nSteps = 1;
- // Falls axialer Farbverlauf, muss die Schrittanzahl ungerade sein
- if ( !bLinear && !(nSteps & 1) )
- nSteps++;
-
- // Berechnung ueber Double-Addition wegen Genauigkeit
- double fScanLine = aRect.Top();
- double fScanInc = (double)aRect.GetHeight() / (double)nSteps;
-
- // Startfarbe berechnen und setzen
- sal_uInt8 nRed;
- sal_uInt8 nGreen;
- sal_uInt8 nBlue;
- long nSteps2;
- long nStepsHalf = 0;
- if ( bLinear )
- {
- // Um 1 erhoeht, um die Border innerhalb der Schleife
- // zeichnen zu koennen
- nSteps2 = nSteps + 1;
- nRed = (sal_uInt8)nStartRed;
- nGreen = (sal_uInt8)nStartGreen;
- nBlue = (sal_uInt8)nStartBlue;
- }
- else
- {
- // Um 2 erhoeht, um die Border innerhalb der Schleife
- // zeichnen zu koennen
- nSteps2 = nSteps + 2;
- nRed = (sal_uInt8)nEndRed;
- nGreen = (sal_uInt8)nEndGreen;
- nBlue = (sal_uInt8)nEndBlue;
- nStepsHalf = nSteps >> 1;
- }
-
- if ( bMtf )
- mpMetaFile->AddAction( new MetaFillColorAction( Color( nRed,
nGreen, nBlue ), sal_True ) );
- else
- mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen, nBlue )
);
-
- // Startpolygon erzeugen (== Borderpolygon)
- Polygon aPoly( 4 );
- Polygon aTempPoly( 2 );
- aPoly[0] = aFullRect.TopLeft();
- aPoly[1] = aFullRect.TopRight();
- aPoly[2] = aRect.TopRight();
- aPoly[3] = aRect.TopLeft();
- aPoly.Rotate( aCenter, nAngle );
-
- // Schleife, um rotierten Verlauf zu fuellen
- for ( long i = 0; i < nSteps2; i++ )
- {
- // berechnetesPolygon ausgeben
- if ( bMtf )
- mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
- else
- ImplDrawPolygon( aPoly, pClipPolyPoly );
-
- // neues Polygon berechnen
- aRect.Top() = (long)(fScanLine += fScanInc);
+ // minimal three steps and maximal as max color steps
+ long nAbsRedSteps = Abs( nEndRed - nStartRed );
+ long nAbsGreenSteps = Abs( nEndGreen - nStartGreen );
+ long nAbsBlueSteps = Abs( nEndBlue - nStartBlue );
+ long nMaxColorSteps = Max( nAbsRedSteps , nAbsGreenSteps );
+ nMaxColorSteps = Max( nMaxColorSteps, nAbsBlueSteps );
+ long nSteps = Min( nStepCount, nMaxColorSteps );
+ if ( nSteps < 3)
+ {
+ nSteps = 3;
+ }
- // unteren Rand komplett fuellen
- if ( i == nSteps )
- {
- aTempPoly[0] = aFullRect.BottomLeft();
- aTempPoly[1] = aFullRect.BottomRight();
- }
- else
- {
- aTempPoly[0] = aRect.TopLeft();
- aTempPoly[1] = aRect.TopRight();
- }
- aTempPoly.Rotate( aCenter, nAngle );
+ double fScanInc = ((double)aRect.GetHeight()) / (double) nSteps;
+ double fGradientLine = (double)aRect.Top();
+ double fMirrorGradientLine = (double) aMirrorRect.Bottom();
+
+ double fAlpha = 0.0;
+ const double fStepsMinus1 = ((double)nSteps) - 1.0;
+ double fTempColor;
+ if ( !bLinear)
+ {
+ nSteps -= 1; // draw middle polygons as one polygon after loop to
avoid gap
+ }
+ for ( long i = 0; i < nSteps; i++ )
+ {
+ // linear interpolation of color
+ fAlpha = ((double)i) / fStepsMinus1;
+ fTempColor = ((double)nStartRed) * (1.0-fAlpha) + ((double)nEndRed) *
fAlpha;
+ nRed = ImplGetGradientColorValue((long)fTempColor);
+ fTempColor = ((double)nStartGreen) * (1.0-fAlpha) +
((double)nEndGreen) * fAlpha;
+ nGreen = ImplGetGradientColorValue((long)fTempColor);
+ fTempColor = ((double)nStartBlue) * (1.0-fAlpha) + ((double)nEndBlue)
* fAlpha;
+ nBlue = ImplGetGradientColorValue((long)fTempColor);
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaFillColorAction( Color( nRed,
nGreen, nBlue ), sal_True ) );
+ else
+ mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen, nBlue ) );
- aPoly[0] = aPoly[3];
- aPoly[1] = aPoly[2];
- aPoly[2] = aTempPoly[1];
- aPoly[3] = aTempPoly[0];
-
- // Farbintensitaeten aendern...
- // fuer lineare FV
- if ( bLinear )
- {
- nRed = ImplGetGradientColorValue(
nStartRed+((nRedSteps*i)/nSteps2) );
- nGreen = ImplGetGradientColorValue(
nStartGreen+((nGreenSteps*i)/nSteps2) );
- nBlue = ImplGetGradientColorValue(
nStartBlue+((nBlueSteps*i)/nSteps2) );
- }
- // fuer radiale FV
- else
- {
- // fuer axiale FV muss die letzte Farbe der ersten
- // Farbe entsprechen
- // #107350# Setting end color one step earlier, as the
- // last time we get here, we drop out of the loop later
- // on.
- if ( i >= nSteps )
- {
- nRed = (sal_uInt8)nEndRed;
- nGreen = (sal_uInt8)nEndGreen;
- nBlue = (sal_uInt8)nEndBlue;
- }
- else
- {
- if ( i <= nStepsHalf )
- {
- nRed = ImplGetGradientColorValue(
nEndRed-((nRedSteps*i)/nSteps2) );
- nGreen = ImplGetGradientColorValue(
nEndGreen-((nGreenSteps*i)/nSteps2) );
- nBlue = ImplGetGradientColorValue(
nEndBlue-((nBlueSteps*i)/nSteps2) );
- }
- // genau die Mitte und hoeher
- else
- {
- long i2 = i - nStepsHalf;
- nRed = ImplGetGradientColorValue(
nStartRed+((nRedSteps*i2)/nSteps2) );
- nGreen = ImplGetGradientColorValue(
nStartGreen+((nGreenSteps*i2)/nSteps2) );
- nBlue = ImplGetGradientColorValue(
nStartBlue+((nBlueSteps*i2)/nSteps2) );
- }
- }
- }
+ // Polygon for this color step
+ aRect.Top() = (long)( fGradientLine + ((double) i) * fScanInc );
+ aRect.Bottom() = (long)( fGradientLine + ( ((double) i) + 1.0 ) *
fScanInc );
+ aPoly[0] = aRect.TopLeft();
+ aPoly[1] = aRect.TopRight();
+ aPoly[2] = aRect.BottomRight();
+ aPoly[3] = aRect.BottomLeft();
+ aPoly.Rotate( aCenter, nAngle );
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
+ else
+ ImplDrawPolygon( aPoly, pClipPolyPoly );
+ if ( !bLinear )
+ {
+ aMirrorRect.Bottom() = (long)( fMirrorGradientLine - ((double) i)
* fScanInc );
+ aMirrorRect.Top() = (long)( fMirrorGradientLine - (((double) i) +
1.0)* fScanInc );
+ aPoly[0] = aMirrorRect.TopLeft();
+ aPoly[1] = aMirrorRect.TopRight();
+ aPoly[2] = aMirrorRect.BottomRight();
+ aPoly[3] = aMirrorRect.BottomLeft();
+ aPoly.Rotate( aCenter, nAngle );
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
+ else
+ ImplDrawPolygon( aPoly, pClipPolyPoly );
+ }
+ }
+ if ( !bLinear)
+ {
+ // draw middle polygon with end color
+ nRed = ImplGetGradientColorValue(nEndRed);
+ nGreen = ImplGetGradientColorValue(nEndGreen);
+ nBlue = ImplGetGradientColorValue(nEndBlue);
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaFillColorAction( Color( nRed,
nGreen, nBlue ), sal_True ) );
+ else
+ mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen, nBlue ) );
- if ( bMtf )
- mpMetaFile->AddAction( new MetaFillColorAction( Color(
nRed, nGreen, nBlue ), sal_True ) );
- else
- mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen,
nBlue ) );
- }
+ aRect.Top() = (long)( fGradientLine + ((double)nSteps) * fScanInc );
+ aRect.Bottom() = (long)( fMirrorGradientLine - ((double) nSteps) *
fScanInc );
+ aPoly[0] = aRect.TopLeft();
+ aPoly[1] = aRect.TopRight();
+ aPoly[2] = aRect.BottomRight();
+ aPoly[3] = aRect.BottomLeft();
+ aPoly.Rotate( aCenter, nAngle );
+ if ( bMtf )
+ mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
+ else
+ ImplDrawPolygon( aPoly, pClipPolyPoly );
+ }
}
// -----------------------------------------------------------------------
