Resolves: #i120957# Added Reginas corrections for gradient colors for...
linear gradients in VCL renderers
Patch by: Regina
Review by: alg
(cherry picked from commit 94205034afa2abe9ab73b2f5d0c76f295a7889c9)
Conflicts:
vcl/source/gdi/outdev4.cxx
Change-Id: I8b66bb1b9155253e138c7ebb4fc3e0686bae7913
diff --git a/vcl/source/gdi/gradient.cxx b/vcl/source/gdi/gradient.cxx
index b4099b5..c1058b2 100644
--- a/vcl/source/gdi/gradient.cxx
+++ b/vcl/source/gdi/gradient.cxx
@@ -194,20 +194,15 @@ void Gradient::GetBoundRect( const Rectangle& rRect, Rectangle& rBoundRect, Poin
if( GetStyle() == GradientStyle_LINEAR || GetStyle() == GradientStyle_AXIAL )
{
aRect.Left()--;
aRect.Top()--;
aRect.Right()++;
aRect.Bottom()++;
const double fAngle = nAngle * F_PI1800;
const double fWidth = aRect.GetWidth();
const double fHeight = aRect.GetHeight();
double fDX = fWidth * fabs( cos( fAngle ) ) + fHeight * fabs( sin( fAngle ) );
double fDY = fHeight * fabs( cos( fAngle ) ) + fWidth * fabs( sin( fAngle ) );
fDX = ( fDX - fWidth ) * 0.5 + 0.5;
fDY = ( fDY - fHeight ) * 0.5 + 0.5;
double fDX = fWidth * fabs( cos( fAngle ) ) +
fHeight * fabs( sin( fAngle ) );
double fDY = fHeight * fabs( cos( fAngle ) ) +
fWidth * fabs( sin( fAngle ) );
fDX = (fDX - fWidth) * 0.5 + 0.5;
fDY = (fDY - fHeight) * 0.5 + 0.5;
aRect.Left() -= (long) fDX;
aRect.Right() += (long) fDX;
aRect.Top() -= (long) fDY;
diff --git a/vcl/source/gdi/outdev4.cxx b/vcl/source/gdi/outdev4.cxx
index 4dd70e6..1be80e9 100644
--- a/vcl/source/gdi/outdev4.cxx
+++ b/vcl/source/gdi/outdev4.cxx
@@ -146,236 +146,210 @@ void OutputDevice::ImplDrawLinearGradient( const Rectangle& rRect,
const Gradient& rGradient,
sal_Bool bMtf, const PolyPolygon* pClipPolyPoly )
{
// rotiertes BoundRect ausrechnen
// get BoundRect of rotated rectangle
Rectangle aRect;
Point aCenter;
sal_uInt16 nAngle = rGradient.GetAngle() % 3600;
rGradient.GetBoundRect( rRect, aRect, aCenter );
// Rand berechnen und Rechteck neu setzen
Rectangle aFullRect = aRect;
long nBorder = (long)rGradient.GetBorder() * aRect.GetHeight() / 100;
// Rand berechnen und Rechteck neu setzen fuer linearen Farbverlauf
bool bLinear = (rGradient.GetStyle() == GradientStyle_LINEAR);
if ( bLinear )
{
aRect.Top() += nBorder;
}
// Rand berechnen und Rechteck neu setzen fuer axiale Farbverlauf
else
{
nBorder >>= 1;
aRect.Top() += nBorder;
aRect.Bottom() -= nBorder;
}
// Top darf nicht groesser als Bottom sein
aRect.Top() = std::min( aRect.Top(), (long)(aRect.Bottom() - 1) );
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
double fBorder = rGradient.GetBorder() * aRect.GetHeight() / 100.0;
if ( !bLinear )
{
nRedSteps <<= 1;
nGreenSteps <<= 1;
nBlueSteps <<= 1;
fBorder /= 2.0;
}
Rectangle aMirrorRect = aRect; // used in style axial
aMirrorRect.Top() = ( aRect.Top() + aRect.Bottom() ) / 2;
if ( !bLinear )
{
aRect.Bottom() = aMirrorRect.Top();
}
// Anzahl der Schritte berechnen, falls nichts uebergeben wurde
// 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;
// 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;
}
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();
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;
}
nStepCount = nMinRect / nInc;
}
// minimal drei Schritte und maximal die Anzahl der Farbunterschiede
long nSteps = std::max( nStepCount, 2L );
long nCalcSteps = std::abs( nRedSteps );
long nTempSteps = std::abs( nGreenSteps );
if ( nTempSteps > nCalcSteps )
nCalcSteps = nTempSteps;
nTempSteps = std::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 )
// minimal three steps and maximal as max color steps
long nAbsRedSteps = std::abs( nEndRed - nStartRed );
long nAbsGreenSteps = std::abs( nEndGreen - nStartGreen );
long nAbsBlueSteps = std::abs( nEndBlue - nStartBlue );
long nMaxColorSteps = std::max( nAbsRedSteps , nAbsGreenSteps );
nMaxColorSteps = std::max( nMaxColorSteps, nAbsBlueSteps );
long nSteps = std::min( nStepCount, nMaxColorSteps );
if ( nSteps < 3)
{
// 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;
nSteps = 3;
}
if ( bMtf )
mpMetaFile->AddAction( new MetaFillColorAction( Color( nRed, nGreen, nBlue ), sal_True ) );
else
mpGraphics->SetFillColor( MAKE_SALCOLOR( nRed, nGreen, nBlue ) );
double fScanInc = ((double)aRect.GetHeight()) / (double) nSteps;
double fGradientLine = (double)aRect.Top();
double fMirrorGradientLine = (double) aMirrorRect.Bottom();
// Startpolygon erzeugen (== Borderpolygon)
Polygon aPoly( 4 );
Polygon aTempPoly( 2 );
Polygon aTempPoly2( 2 );
/* n#710061 Use overlapping fills to avoid color
* leak via gaps in some pdf viewers
*/
Point aOverLap( 0, fScanInc*.1 );
aPoly[0] = aFullRect.TopLeft();
aPoly[1] = aFullRect.TopRight();
aPoly[2] = aRect.TopRight();
aPoly[3] = aRect.TopLeft();
aPoly.Rotate( aCenter, nAngle );
aTempPoly[0] = aPoly[3];
aTempPoly[1] = aPoly[2];
// Schleife, um rotierten Verlauf zu fuellen
for ( long i = 0; i < nSteps2; i++ )
double fAlpha = 0.0;
const double fStepsMinus1 = ((double)nSteps) - 1.0;
double fTempColor;
if ( !bLinear)
{
// berechnetesPolygon ausgeben
if ( bMtf )
mpMetaFile->AddAction( new MetaPolygonAction( aPoly ) );
else
ImplDrawPolygon( aPoly, pClipPolyPoly );
// neues Polygon berechnen
aRect.Top() = (long)(fScanLine += fScanInc);
aPoly[0] = aTempPoly[0];
aPoly[1] = aTempPoly[1];
// unteren Rand komplett fuellen
if ( i == nSteps )
{
aTempPoly[0] = aFullRect.BottomLeft();
aTempPoly[1] = aFullRect.BottomRight();
aTempPoly2 = aTempPoly;
}
else
{
aTempPoly[0] = aRect.TopLeft();
aTempPoly[1] = aRect.TopRight();
aTempPoly2[0]= aTempPoly[0] + aOverLap;
aTempPoly2[1]= aTempPoly[1] + aOverLap;
}
aTempPoly2.Rotate( aCenter, nAngle );
aTempPoly.Rotate( aCenter, nAngle );
aPoly[2] = aTempPoly2[1];
aPoly[3] = aTempPoly2[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) );
}
}
}
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 ) );
// Polygon for this color step
aRect.Top() = (long)( fGradientLine + ((double) i) * fScanInc );
aRect.Bottom() = (long)( fGradientLine + ( ((double) i) + 1.0 ) * fScanInc + fScanInc*.1 );
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 ) );
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 );
}
}
@@ -406,7 +380,7 @@ void OutputDevice::ImplDrawComplexGradient( const Rectangle& rRect,
long nGreenSteps = nEndGreen - nStartGreen;
long nBlueSteps = nEndBlue - nStartBlue;
long nStepCount = rGradient.GetSteps();
sal_uInt16 nAngle = rGradient.GetAngle() % 3600;
sal_uInt16 nAngle = rGradient.GetAngle() % 3600;
rGradient.GetBoundRect( rRect, aRect, aCenter );
@@ -455,8 +429,8 @@ void OutputDevice::ImplDrawComplexGradient( const Rectangle& rRect,
double fScanTop = aRect.Top();
double fScanRight = aRect.Right();
double fScanBottom = aRect.Bottom();
double fScanIncX = (double) aRect.GetWidth() / (double) nSteps * 0.5;
double fScanIncY = (double) aRect.GetHeight() / (double) nSteps * 0.5;
double fScanIncX = (double) aRect.GetWidth() / (double) nSteps * 0.5;
double fScanIncY = (double) aRect.GetHeight() / (double) nSteps * 0.5;
// all gradients are rendered as nested rectangles which shrink
// equally in each dimension - except for 'square' gradients
@@ -466,7 +440,6 @@ void OutputDevice::ImplDrawComplexGradient( const Rectangle& rRect,
fScanIncY = std::min( fScanIncY, fScanIncX );
fScanIncX = fScanIncY;
}
sal_uInt8 nRed = (sal_uInt8) nStartRed, nGreen = (sal_uInt8) nStartGreen, nBlue = (sal_uInt8) nStartBlue;
bool bPaintLastPolygon( false ); // #107349# Paint last polygon only if loop has generated any output
