D11198: [libbreezecommon] Add box shadow helper

[Rik Mills]

rikmills added a comment.


  Fails to build from source:
  
  https://build.neon.kde.org/job/bionic_unstable_kde_breeze_bin_armhf/44/consoleFull
  
  06:47:17 CMakeFiles/Makefile2:118: recipe for target 'libbreezecommon/CMakeFiles/breezecommon4.dir/all' failed
  06:47:17 /workspace/build/libbreezecommon/breezeboxshadowhelper.cpp: In function ‘void Breeze::BoxShadowHelper::blurAlphaNaive(QImage&, int)’:
  06:47:17 /workspace/build/libbreezecommon/breezeboxshadowhelper.cpp:138:56: error: conversion from ‘QVector<double>’ to non-scalar type ‘const QVector<float>’ requested
  06:47:17      const QVector<qreal> kernel = computeGaussianKernel(radius);
  06:47:17                                    ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
  06:47:17 In file included from /usr/include/qt4/QtGui/qpolygon.h:45:0,
  06:47:17                  from /usr/include/qt4/QtGui/qmatrix.h:45,
  06:47:17                  from /usr/include/qt4/QtGui/qtransform.h:44,
  06:47:17                  from /usr/include/qt4/QtGui/qimage.h:45,
  06:47:17                  from /usr/include/qt4/QtGui/qpixmap.h:50,
  06:47:17                  from /usr/include/qt4/QtGui/qpainter.h:49,
  06:47:17                  from /usr/include/qt4/QtGui/QPainter:1,
  06:47:17                  from /workspace/build/libbreezecommon/breezeboxshadowhelper.h:27,
  06:47:17                  from /workspace/build/libbreezecommon/breezeboxshadowhelper.cpp:21:
  06:47:17 /usr/include/qt4/QtCore/qvector.h: In instantiation of ‘int QVector<T>::sizeOfTypedData() [with T = double]’:
  06:47:17 /usr/include/qt4/QtCore/qvector.h:503:49:   required from ‘void QVector<T>::realloc(int, int) [with T = double]’
  06:47:17 /usr/include/qt4/QtCore/qvector.h:340:32:   required from ‘void QVector<T>::reserve(int) [with T = double]’
  06:47:17 /workspace/build/libbreezecommon/breezeboxshadowhelper.cpp:62:30:   required from here
  06:47:17 /usr/include/qt4/QtCore/qvector.h:323:49: warning: cast from ‘QVector<double>*’ to ‘const Data* {aka const QVectorTypedData<double>*}’ increases required alignment of target type [-Wcast-align]
  06:47:17          return reinterpret_cast<const char *>(&(reinterpret_cast<const Data *>(this))->array[1]) - reinterpret_cast<const char *>(this);
  06:47:17                                                 ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  06:47:17 make[5]: [libbreezecommon/CMakeFiles/breezecommon4.dir/breezeboxshadowhelper.cpp.o] Error 1
  06:47:17 make[4]:  [libbreezecommon/CMakeFiles/breezecommon4.dir/all] Error 2

REPOSITORY
  R31 Breeze

REVISION DETAIL
  https://phabricator.kde.org/D11198

To: zzag, #breeze, #vdg, hpereiradacosta
Cc: rikmills, ngraham, broulik, abetts, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, sebas, apol, mart
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