Fix bitmap resizing issue when using ScaleRotateCrop with BitmapEx.

Change-Id: I1fd08d94c506580ed7557066448ccb10adb9b16d

3 files changed, 22 insertions, 186 deletions

diff --git a/vcl/inc/vcl/bitmapex.hxx b/vcl/inc/vcl/bitmapex.hxx
index a29c27177679..437c70a794a8 100644
--- a/vcl/inc/vcl/bitmapex.hxx
+++ b/vcl/inc/vcl/bitmapex.hxx
@@ -60,7 +60,7 @@ private:
     Size                aBitmapSize;
     Color               aTransparentColor;
     TransparentType     eTransparent;
-    sal_Bool                bAlpha;
+    sal_Bool            bAlpha;
 
 public:
 
diff --git a/vcl/source/gdi/bitmap3.cxx b/vcl/source/gdi/bitmap3.cxx
index b1a028cfe67c..edae9e1c715a 100644
--- a/vcl/source/gdi/bitmap3.cxx
+++ b/vcl/source/gdi/bitmap3.cxx
@@ -2383,7 +2383,7 @@ sal_Bool Bitmap::ScaleCropRotate(
 {
     bool bRet;
 
-    if ( rScaleY < 0.6 && rScaleX < 0.6 )
+    if ( rScaleX < 0.6 || rScaleY < 0.6 )
     {
         bRet = ImplTransformAveraging( rScaleX, rScaleY, rRectPixel, nAngle10, rFillColor);
     }
@@ -2508,24 +2508,22 @@ bool Bitmap::ImplTransformAveraging( const double& rScaleX, const double& rScale
 // Filtering shows bad results at shrinking for a factor less than 0.5 because of limited sampling.
 bool Bitmap::ImplTransformBilinearFiltering( const double& rScaleX, const double& rScaleY, const Rectangle& rRotatedRectangle, const long nAngle10, const Color& rFillColor )
 {
-    const Size  aSizePix( GetSizePixel() );
-
-    const int nOriginWidth  = aSizePix.Width();
-    const int nOriginHeight = aSizePix.Height();
-
-    const int nScaledWidth  = FRound( aSizePix.Width() * rScaleX );
-    const int nScaledHeight = FRound( aSizePix.Height() * rScaleY );
+    const int nOriginWidth  = GetSizePixel().Width();
+    const int nOriginHeight = GetSizePixel().Height();
 
-    const int nStartX = rRotatedRectangle.Left();
-    const int nStartY = rRotatedRectangle.Top();
-    const int nEndX   = rRotatedRectangle.Right();
-    const int nEndY   = rRotatedRectangle.Bottom();
+    const int nScaledWidth  = FRound( nOriginWidth  * rScaleX );
+    const int nScaledHeight = FRound( nOriginHeight * rScaleY );
 
     const int nTargetWidth  = rRotatedRectangle.GetWidth();
     const int nTargetHeight = rRotatedRectangle.GetHeight();
 
-    const double fCosAngle = cos( nAngle10 * F_PI1800 );
-    const double fSinAngle = sin( nAngle10 * F_PI1800 );
+    const int nStartX       = rRotatedRectangle.Left();
+    const int nEndX         = rRotatedRectangle.Right();
+    const int nStartY       = rRotatedRectangle.Top();
+    const int nEndY         = rRotatedRectangle.Bottom();
+
+    const double fCosAngle  = cos( nAngle10 * F_PI1800 );
+    const double fSinAngle  = sin( nAngle10 * F_PI1800 );
 
     Bitmap aOutBmp( Size( nTargetWidth, nTargetHeight ), 24 );
 
@@ -2612,169 +2610,4 @@ bool Bitmap::ImplTransformBilinearFiltering( const double& rScaleX, const double
     return true;
 }
 
-/*bool Bitmap::ImplScaleSuperFast( const double& rScaleX, const double& rScaleY, const Rectangle& rRectPixel )
-{
-    const Size  aSizePix( GetSizePixel() );
-
-    const int nOriginWidth  = aSizePix.Width();
-    const int nOriginHeight = aSizePix.Height();
-
-    const int nStartX = rRectPixel.Left();
-    const int nStartY = rRectPixel.Top();
-    const int nEndX   = rRectPixel.Right();
-    const int nEndY   = rRectPixel.Bottom();
-
-    const int nTargetWidth = rRectPixel.GetWidth();
-    const int nTargetHeight = rRectPixel.GetHeight();
-
-    BitmapColor aColor00, aColor01, aColor10, aColor11, aResultColor;
-
-    Bitmap aOutBmp( Size( nTargetWidth, nTargetHeight ), 24 );
-
-    BitmapReadAccess*   pReadAccess = AcquireReadAccess();
-    BitmapWriteAccess*  pWriteAccess = aOutBmp.AcquireWriteAccess();
-
-    if( !pReadAccess || !pWriteAccess )
-        return false;
-
-    double aReverseScaleX = 1.0 / rScaleX;
-    double aReverseScaleY = 1.0 / rScaleY;
-
-    int x, y, xOut, yOut;
-
-    for( y = nStartY, yOut = 0; y <= nEndY; y++, yOut++ )
-    {
-        double sy0 = ((y + 0.5) * aReverseScaleY) - 0.5;
-
-        int y0 = MinMax( floor( sy0 ), 0, nOriginHeight - 1);
-        int y1 = MinMax(       y0 + 1, 0, nOriginHeight - 1);
-
-       for( x = nStartX, xOut = 0; x <= nEndX; x++, xOut++ )
-        {
-            double sx0 = ((x + 0.5) * aReverseScaleX) - 0.5;
-            int x0 = MinMax( floor( sx0 ), 0, nOriginWidth - 1);
-            int x1 = MinMax(       x0 + 1, 0, nOriginWidth - 1);
-
-            aColor00 = pReadAccess->GetPixel( y0, x0 );
-            aColor01 = pReadAccess->GetPixel( y1, x0 );
-            aColor10 = pReadAccess->GetPixel( y0, x1 );
-            aColor11 = pReadAccess->GetPixel( y1, x1 );
-
-            if( pReadAccess->HasPalette() )
-            {
-                aColor00 = pReadAccess->GetPaletteColor( aColor00 );
-                aColor01 = pReadAccess->GetPaletteColor( aColor01 );
-                aColor10 = pReadAccess->GetPaletteColor( aColor10 );
-                aColor11 = pReadAccess->GetPaletteColor( aColor11 );
-            }
-
-            double fx0 = sx0 - x0;
-            double fy0 = sy0 - y0;
-            double fx1 = 1.0 - fx0;
-            double fy1 = 1.0 - fy0;
-
-            double w00 = fx1 * fy1;
-            double w01 = fx1 * fy0;
-            double w10 = fx0 * fy1;
-            double w11 = fx0 * fy0;
-
-            double red   = aColor00.GetRed()   * w00 + aColor10.GetRed()   * w10 + aColor01.GetRed()   * w01 + aColor11.GetRed()   * w11;
-            double green = aColor00.GetGreen() * w00 + aColor10.GetGreen() * w10 + aColor01.GetGreen() * w01 + aColor11.GetGreen() * w11;
-            double blue  = aColor00.GetBlue()  * w00 + aColor10.GetBlue()  * w10 + aColor01.GetBlue()  * w01 + aColor11.GetBlue()  * w11;
-
-            aResultColor.SetRed(   MinMax(red,   0, 255) );
-            aResultColor.SetGreen( MinMax(green, 0, 255) );
-            aResultColor.SetBlue(  MinMax(blue,  0, 255) );
-
-            pWriteAccess->SetPixel( yOut, xOut, aResultColor );
-        }
-    }
-
-    ReleaseAccess( pReadAccess );
-    aOutBmp.ReleaseAccess( pWriteAccess );
-    ImplAssignWithSize( aOutBmp );
-
-    return true;
-}
-bool Bitmap::ImplScaleSuper( const double& rScaleX, const double& rScaleY, const Rectangle& rRectPixel, const long nAngle10, const Color& rFillColor )
-{
-    Rectangle aRect( rRectPixel );
-
-    const int nStartX = aRect.Left();
-    const int nStartY = aRect.Top();
-    const int nEndX   = aRect.Right();
-    const int nEndY   = aRect.Bottom();
-
-    const int nTargetWidth   = aRect.GetWidth();
-    const int nTargetHeight = aRect.GetHeight();
-
-    const int nOriginWidth  = GetSizePixel().Width();
-    const int nOriginHeight = GetSizePixel().Height();
-
-    const double aReverseScaleX = 1.0 / rScaleX;
-    const double aReverseScaleY = 1.0 / rScaleY;
-
-    if( nTargetWidth <= 1L  || nTargetHeight <= 1L )
-        return false;
-
-    BitmapColor aColor, aResultColor;
-
-    Bitmap aOutBmp( Size( nTargetWidth, nTargetHeight ), 24 );
-
-    BitmapReadAccess*   pReadAccess = AcquireReadAccess();
-    BitmapWriteAccess*  pWriteAccess = aOutBmp.AcquireWriteAccess();
-
-    if( !pReadAccess || !pWriteAccess )
-        return false;
-
-    int x, y, xOut, yOut;
-    int aCount;
-    double aSumRed, aSumGreen, aSumBlue;
-
-    for( y = nStartY, yOut = 0; y <= nEndY; y++, yOut++ )
-    {
-        int yStart = MinMax( floor( y     * aReverseScaleY ), 0, nOriginHeight - 1);
-        int yEnd   = MinMax( floor( (y+1) * aReverseScaleY ), 0, nOriginHeight - 1);
-
-        for( x = nStartX, xOut = 0; x <= nEndX; x++, xOut++ )
-        {
-            int xStart = MinMax( floor( x     * aReverseScaleX ), 0, nOriginWidth - 1);
-            int xEnd   = MinMax( floor( (x+1) * aReverseScaleX ), 0, nOriginWidth - 1);
-
-            aSumRed = aSumGreen = aSumBlue = 0.0;
-            aCount = 0;
-
-            for (int yIn = yStart; yIn < yEnd; yIn++)
-            {
-                for (int xIn = xStart; xIn < xEnd; xIn++)
-                {
-                    aColor = pReadAccess->GetPixel( yIn, xIn );
-
-                    if( pReadAccess->HasPalette() )
-                        aColor = pReadAccess->GetPaletteColor( aColor );
-
-                    aSumRed   += aColor.GetRed();
-                    aSumGreen += aColor.GetGreen();
-                    aSumBlue  += aColor.GetBlue();
-
-                    aCount++;
-                }
-            }
-
-            aResultColor.SetRed(   MinMax(aSumRed   / aCount, 0, 255) );
-            aResultColor.SetGreen( MinMax(aSumGreen / aCount, 0, 255) );
-            aResultColor.SetBlue(  MinMax(aSumBlue  / aCount, 0, 255) );
-
-            pWriteAccess->SetPixel( yOut, xOut, aResultColor );
-        }
-    }
-
-    ReleaseAccess( pReadAccess );
-    aOutBmp.ReleaseAccess( pWriteAccess );
-    ImplAssignWithSize( aOutBmp );
-
-    return true;
-}
-*/
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/gdi/bitmapex.cxx b/vcl/source/gdi/bitmapex.cxx
index e9a3ab4b390a..beba5d50a6a7 100644
--- a/vcl/source/gdi/bitmapex.cxx
+++ b/vcl/source/gdi/bitmapex.cxx
@@ -444,16 +444,16 @@ sal_Bool BitmapEx::Scale( const Size& rNewSize, sal_uLong nScaleFlag )
 }
 
 sal_Bool BitmapEx::ScaleCropRotate(
-        const double& rScaleX, const double& rScaleY, const Rectangle& rRectPixel, long nAngle10,
-        const Color& rFillColor, sal_uLong nScaleFlag )
+        const double& rScaleX, const double& rScaleY, const Rectangle& rRectPixel,
+        long nAngle10, const Color& rFillColor, sal_uLong nScaleFlag )
 {
-    sal_Bool bRet = sal_False;
+    bool bRet = false;
+
+    const bool bTransparentRotate = ( Color( COL_TRANSPARENT ) == rFillColor );
 
     if( !!aBitmap )
     {
-        const sal_Bool bTransRotate = ( Color( COL_TRANSPARENT ) == rFillColor );
-
-        if( bTransRotate )
+        if( bTransparentRotate )
         {
             if( eTransparent == TRANSPARENT_COLOR )
             {
@@ -482,6 +482,9 @@ sal_Bool BitmapEx::ScaleCropRotate(
         }
     }
 
+    if (bRet)
+        aBitmapSize = aBitmap.GetSizePixel();
+
     return bRet;
 }