Differential D19164 Diff 53087 imagelib/effects/kpEffectHSV.cpp

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imagelib/effects/kpEffectHSV.cpp

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39#include "pixmapfx/kpPixmapFX.h" 39​#include "pixmapfx/kpPixmapFX.h"
40 40​
41 41​
42static void ColorToHSV(unsigned int c, float* pHue, float* pSaturation, float* pValue) 42​static void ColorToHSV(unsigned int c, float* pHue, float* pSaturation, float* pValue)
43{ 43​{
44 int r = qRed(c); 44​ int r = qRed(c);
45 int g = qGreen(c); 45​ int g = qGreen(c);
46 int b = qBlue(c); 46​ int b = qBlue(c);
47 int min; 47​ int min{};
48 if(b >= g && b >= r) 48​ if(b >= g && b >= r)
49 { 49​ {
50 // Blue 50​ // Blue
51 min = qMin(r, g); 51​ min = qMin(r, g);
52 if(b != min) 52​ if(b != min)
53 { 53​ {
54 *pHue = static_cast<float> (r - g) / ((b - min) * 6) + static_cast<float> (2) / 3; 54​ *pHue = static_cast<float> (r - g) / ((b - min) * 6) + static_cast<float> (2) / 3;
55 *pSaturation = 1.0f - static_cast<float> (min) / static_cast<float> (b); 55​ *pSaturation = 1.0f - static_cast<float> (min) / static_cast<float> (b);
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79 } 79​ }
80 else 80​ else
81 { 81​ {
82 // Red 82​ // Red
83 min = qMin(g, b); 83​ min = qMin(g, b);
84 if(r != min) 84​ if(r != min)
85 { 85​ {
86 *pHue = static_cast<float> (g - b) / ((r - min) * 6); 86​ *pHue = static_cast<float> (g - b) / ((r - min) * 6);
87 if(*pHue < 0) 87​ if(*pHue < 0) {
88 (*pHue) += 1.0f; 88​ (*pHue) += 1.0f;
89​ }
89 *pSaturation = 1.0f - static_cast<float> (min) / static_cast<float> (r); 90​ *pSaturation = 1.0f - static_cast<float> (min) / static_cast<float> (r);
90 } 91​ }
91 else 92​ else
92 { 93​ {
93 *pHue = 0; 94​ *pHue = 0;
94 *pSaturation = 0; 95​ *pSaturation = 0;
95 } 96​ }
96 *pValue = static_cast<float> (r) / 255; 97​ *pValue = static_cast<float> (r) / 255;
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