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Try to find closest color in dxf palette
This commit is contained in:
Marco Hugentobler
parent
f98ecf753f
commit
eee9a4976d
@ -19,13 +19,274 @@
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#include "qgsvectordataprovider.h"
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#include "qgspoint.h"
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#include "qgsrendererv2.h"
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#include "qgssymbollayerv2.h"
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#include "qgsvectorlayer.h"
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#include <QIODevice>
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#include <QTextStream>
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//dxf color palette
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double QgsDxfExport::mDxfColors[][3] =
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{
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{0, 0, 0}, // unused
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{1, 0, 0}, // 1
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{1, 1, 0},
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{0, 1, 0},
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{0, 1, 1},
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{0, 0, 1},
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{1, 0, 1},
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{1, 1, 1}, // black or white
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{0.5, 0.5, 0.5},
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{0.75, 0.75, 0.75},
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{1, 0, 0}, // 10
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{1, 0.5, 0.5},
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{0.65, 0, 0},
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{0.65, 0.325, 0.325},
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{0.5, 0, 0},
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{0.5, 0.25, 0.25},
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{0.3, 0, 0},
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{0.3, 0.15, 0.15},
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{0.15, 0, 0},
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{0.15, 0.075, 0.075},
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{1, 0.25, 0}, // 20
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{1, 0.625, 0.5},
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{0.65, 0.1625, 0},
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{0.65, 0.4063, 0.325},
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{0.5, 0.125, 0},
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{0.5, 0.3125, 0.25},
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{0.3, 0.075, 0},
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{0.3, 0.1875, 0.15},
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{0.15, 0.0375, 0},
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{0.15, 0.0938, 0.075},
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{1, 0.5, 0}, // 30
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{1, 0.75, 0.5},
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{0.65, 0.325, 0},
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{0.65, 0.4875, 0.325},
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{0.5, 0.25, 0},
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{0.5, 0.375, 0.25},
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{0.3, 0.15, 0},
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{0.3, 0.225, 0.15},
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{0.15, 0.075, 0},
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{0.15, 0.1125, 0.075},
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{1, 0.75, 0}, // 40
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{1, 0.875, 0.5},
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{0.65, 0.4875, 0},
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{0.65, 0.5688, 0.325},
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{0.5, 0.375, 0},
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{0.5, 0.4375, 0.25},
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{0.3, 0.225, 0},
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{0.3, 0.2625, 0.15},
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{0.15, 0.1125, 0},
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{0.15, 0.1313, 0.075},
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{1, 1, 0}, // 50
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{1, 1, 0.5},
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{0.65, 0.65, 0},
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{0.65, 0.65, 0.325},
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{0.5, 0.5, 0},
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{0.5, 0.5, 0.25},
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{0.3, 0.3, 0},
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{0.3, 0.3, 0.15},
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{0.15, 0.15, 0},
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{0.15, 0.15, 0.075},
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{0.75, 1, 0}, // 60
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{0.875, 1, 0.5},
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{0.4875, 0.65, 0},
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{0.5688, 0.65, 0.325},
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{0.375, 0.5, 0},
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{0.4375, 0.5, 0.25},
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{0.225, 0.3, 0},
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{0.2625, 0.3, 0.15},
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{0.1125, 0.15, 0},
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{0.1313, 0.15, 0.075},
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{0.5, 1, 0}, // 70
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{0.75, 1, 0.5},
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{0.325, 0.65, 0},
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{0.4875, 0.65, 0.325},
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{0.25, 0.5, 0},
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{0.375, 0.5, 0.25},
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{0.15, 0.3, 0},
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{0.225, 0.3, 0.15},
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{0.075, 0.15, 0},
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{0.1125, 0.15, 0.075},
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{0.25, 1, 0}, // 80
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{0.625, 1, 0.5},
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{0.1625, 0.65, 0},
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{0.4063, 0.65, 0.325},
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{0.125, 0.5, 0},
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{0.3125, 0.5, 0.25},
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{0.075, 0.3, 0},
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{0.1875, 0.3, 0.15},
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{0.0375, 0.15, 0},
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{0.0938, 0.15, 0.075},
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{0, 1, 0}, // 90
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{0.5, 1, 0.5},
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{0, 0.65, 0},
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{0.325, 0.65, 0.325},
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{0, 0.5, 0},
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{0.25, 0.5, 0.25},
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{0, 0.3, 0},
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{0.15, 0.3, 0.15},
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{0, 0.15, 0},
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{0.075, 0.15, 0.075},
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{0, 1, 0.25}, // 100
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{0.5, 1, 0.625},
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{0, 0.65, 0.1625},
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{0.325, 0.65, 0.4063},
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{0, 0.5, 0.125},
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{0.25, 0.5, 0.3125},
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{0, 0.3, 0.075},
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{0.15, 0.3, 0.1875},
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{0, 0.15, 0.0375},
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{0.075, 0.15, 0.0938},
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{0, 1, 0.5}, // 110
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{0.5, 1, 0.75},
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{0, 0.65, 0.325},
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{0.325, 0.65, 0.4875},
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{0, 0.5, 0.25},
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{0.25, 0.5, 0.375},
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{0, 0.3, 0.15},
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{0.15, 0.3, 0.225},
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{0, 0.15, 0.075},
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{0.075, 0.15, 0.1125},
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{0, 1, 0.75}, // 120
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{0.5, 1, 0.875},
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{0, 0.65, 0.4875},
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{0.325, 0.65, 0.5688},
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{0, 0.5, 0.375},
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{0.25, 0.5, 0.4375},
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{0, 0.3, 0.225},
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{0.15, 0.3, 0.2625},
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{0, 0.15, 0.1125},
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{0.075, 0.15, 0.1313},
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{0, 1, 1}, // 130
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{0.5, 1, 1},
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{0, 0.65, 0.65},
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{0.325, 0.65, 0.65},
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{0, 0.5, 0.5},
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{0.25, 0.5, 0.5},
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{0, 0.3, 0.3},
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{0.15, 0.3, 0.3},
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{0, 0.15, 0.15},
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{0.075, 0.15, 0.15},
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{0, 0.75, 1}, // 140
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{0.5, 0.875, 1},
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{0, 0.4875, 0.65},
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{0.325, 0.5688, 0.65},
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{0, 0.375, 0.5},
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{0.25, 0.4375, 0.5},
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{0, 0.225, 0.3},
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{0.15, 0.2625, 0.3},
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{0, 0.1125, 0.15},
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{0.075, 0.1313, 0.15},
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{0, 0.5, 1}, // 150
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{0.5, 0.75, 1},
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{0, 0.325, 0.65},
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{0.325, 0.4875, 0.65},
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{0, 0.25, 0.5},
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{0.25, 0.375, 0.5},
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{0, 0.15, 0.3},
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{0.15, 0.225, 0.3},
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{0, 0.075, 0.15},
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{0.075, 0.1125, 0.15},
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{0, 0.25, 1}, // 160
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{0.5, 0.625, 1},
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{0, 0.1625, 0.65},
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{0.325, 0.4063, 0.65},
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{0, 0.125, 0.5},
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{0.25, 0.3125, 0.5},
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{0, 0.075, 0.3},
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{0.15, 0.1875, 0.3},
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{0, 0.0375, 0.15},
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{0.075, 0.0938, 0.15},
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{0, 0, 1}, // 170
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{0.5, 0.5, 1},
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{0, 0, 0.65},
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{0.325, 0.325, 0.65},
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{0, 0, 0.5},
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{0.25, 0.25, 0.5},
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{0, 0, 0.3},
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{0.15, 0.15, 0.3},
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{0, 0, 0.15},
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{0.075, 0.075, 0.15},
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{0.25, 0, 1}, // 180
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{0.625, 0.5, 1},
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{0.1625, 0, 0.65},
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{0.4063, 0.325, 0.65},
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{0.125, 0, 0.5},
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{0.3125, 0.25, 0.5},
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{0.075, 0, 0.3},
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{0.1875, 0.15, 0.3},
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{0.0375, 0, 0.15},
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{0.0938, 0.075, 0.15},
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{0.5, 0, 1}, // 190
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{0.75, 0.5, 1},
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{0.325, 0, 0.65},
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{0.4875, 0.325, 0.65},
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{0.25, 0, 0.5},
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{0.375, 0.25, 0.5},
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{0.15, 0, 0.3},
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{0.225, 0.15, 0.3},
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{0.075, 0, 0.15},
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{0.1125, 0.075, 0.15},
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{0.75, 0, 1}, // 200
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{0.875, 0.5, 1},
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{0.4875, 0, 0.65},
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{0.5688, 0.325, 0.65},
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{0.375, 0, 0.5},
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{0.4375, 0.25, 0.5},
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{0.225, 0, 0.3},
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{0.2625, 0.15, 0.3},
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{0.1125, 0, 0.15},
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{0.1313, 0.075, 0.15},
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{1, 0, 1}, // 210
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{1, 0.5, 1},
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{0.65, 0, 0.65},
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{0.65, 0.325, 0.65},
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{0.5, 0, 0.5},
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{0.5, 0.25, 0.5},
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{0.3, 0, 0.3},
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{0.3, 0.15, 0.3},
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{0.15, 0, 0.15},
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{0.15, 0.075, 0.15},
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{1, 0, 0.75}, // 220
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{1, 0.5, 0.875},
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{0.65, 0, 0.4875},
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{0.65, 0.325, 0.5688},
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{0.5, 0, 0.375},
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{0.5, 0.25, 0.4375},
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{0.3, 0, 0.225},
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{0.3, 0.15, 0.2625},
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{0.15, 0, 0.1125},
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{0.15, 0.075, 0.1313},
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{1, 0, 0.5}, // 230
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{1, 0.5, 0.75},
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{0.65, 0, 0.325},
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{0.65, 0.325, 0.4875},
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{0.5, 0, 0.25},
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{0.5, 0.25, 0.375},
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{0.3, 0, 0.15},
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{0.3, 0.15, 0.225},
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{0.15, 0, 0.075},
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{0.15, 0.075, 0.1125},
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{1, 0, 0.25}, // 240
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{1, 0.5, 0.625},
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{0.65, 0, 0.1625},
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{0.65, 0.325, 0.4063},
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{0.5, 0, 0.125},
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{0.5, 0.25, 0.3125},
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{0.3, 0, 0.075},
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{0.3, 0.15, 0.1875},
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{0.15, 0, 0.0375},
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{0.15, 0.075, 0.0938},
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{0.33, 0.33, 0.33}, // 250
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{0.464, 0.464, 0.464},
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{0.598, 0.598, 0.598},
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{0.732, 0.732, 0.732},
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{0.866, 0.866, 0.866},
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{1, 1, 1} // 255
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};
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QgsDxfExport::QgsDxfExport(): mSymbologyScaleDenominator( 1.0 ), mSymbologyExport( NoSymbology )
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{
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initColorPalette();
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}
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QgsDxfExport::~QgsDxfExport()
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@ -366,8 +627,8 @@ int QgsDxfExport::colorFromSymbolLayer( const QgsSymbolLayerV2* symbolLayer )
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return 0;
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}
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return 1; //todo...
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QColor c = symbolLayer->color();
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return closestColorMatch( c.rgba() );
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}
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double QgsDxfExport::widthFromSymbolLayer( const QgsSymbolLayerV2* symbolLayer )
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@ -375,13 +636,13 @@ double QgsDxfExport::widthFromSymbolLayer( const QgsSymbolLayerV2* symbolLayer )
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return 50; //todo...
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}
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int QgsDxfExport::closestMatch( QRgb pixel, const QVector<QRgb>& palette )
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int QgsDxfExport::closestColorMatch( QRgb pixel )
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{
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int idx = 0;
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int current_distance = INT_MAX;
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for ( int i = 0; i < palette.size(); ++i )
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for ( int i = 1; i < 256; ++i )
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{
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int dist = pixel_distance( pixel, palette.at( i ) );
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int dist = color_distance( pixel, i );
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if ( dist < current_distance )
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{
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current_distance = dist;
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@ -391,31 +652,20 @@ int QgsDxfExport::closestMatch( QRgb pixel, const QVector<QRgb>& palette )
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return idx;
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}
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int QgsDxfExport::pixel_distance( QRgb p1, QRgb p2 )
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int QgsDxfExport::color_distance( QRgb p1, int index )
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{
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int r1 = qRed( p1 );
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int g1 = qGreen( p1 );
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int b1 = qBlue( p1 );
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int a1 = qAlpha( p1 );
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if ( index > 255 || index < 0 )
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{
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return 0;
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}
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int r2 = qRed( p2 );
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int g2 = qGreen( p2 );
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int b2 = qBlue( p2 );
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int a2 = qAlpha( p2 );
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return abs( r1 - r2 ) + abs( g1 - g2 ) + abs( b1 - b2 ) + abs( a1 - a2 );
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double redDiff = qRed( p1 ) - mDxfColors[index][0] * 255;
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double greenDiff = qGreen( p1 ) - mDxfColors[index][1] * 255;
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double blueDiff = qBlue( p1 ) - mDxfColors[index][2] * 255;
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return ( redDiff * redDiff + greenDiff * greenDiff + blueDiff * blueDiff );
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}
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void QgsDxfExport::initColorPalette()
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QRgb QgsDxfExport::createRgbEntry( qreal r, qreal g, qreal b )
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{
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mDxfColorPalette.resize( 256 );
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mDxfColorPalette[1] = qRgb( 255, 0, 0 );
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mDxfColorPalette[2] = qRgb( 255, 255, 0 );
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mDxfColorPalette[3] = qRgb( 0, 255, 0 );
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mDxfColorPalette[4] = qRgb( 0, 255, 255 );
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mDxfColorPalette[5] = qRgb( 0, 0, 255 );
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mDxfColorPalette[6] = qRgb( 255, 0, 255 );
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mDxfColorPalette[7] = qRgb( 255, 255, 255 );
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mDxfColorPalette[8] = qRgb( 255, 255, 255 );
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mDxfColorPalette[9] = qRgb( 255, 255, 255 );
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return QColor::fromRgbF( r, g, b ).rgb();
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}
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@ -83,9 +83,11 @@ class QgsDxfExport
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double widthFromSymbolLayer( const QgsSymbolLayerV2* symbolLayer );
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//functions for dxf palette
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void initColorPalette();
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static int closestMatch( QRgb pixel, const QVector<QRgb>& palette );
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static int pixel_distance( QRgb p1, QRgb p2 );
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static int closestColorMatch( QRgb pixel );
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static int color_distance( QRgb p1, int index );
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static QRgb createRgbEntry( qreal r, qreal g, qreal b );
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static double mDxfColors[][3];
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};
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