Differential D19164 Diff 53087 imagelib/effects/kpEffectBalance.cpp

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imagelib/effects/kpEffectBalance.cpp

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33#include <cmath> 33​#include <cmath>
34#include <QImage> 34​#include <QImage>
35#include "kpLogCategories.h" 35​#include "kpLogCategories.h"
36#include "pixmapfx/kpPixmapFX.h" 36​#include "pixmapfx/kpPixmapFX.h"
37#include <qdatetime.h> 37​#include <qdatetime.h>
38 38​
39static inline int between0And255 (int val) 39​static inline int between0And255 (int val)
40{ 40​{
41 if (val < 0) 41​ if (val < 0) {
42 return 0; 42​ return 0;
43 else if (val > 255) 43​ }
44​
45​ if (val > 255) {
44 return 255; 46​ return 255;
45 else 47​ }
48​
46 return val; 49​ return val;
47} 50​}
48 51​
49 52​
50static inline int brightness (int base, int strength) 53​static inline int brightness (int base, int strength)
51{ 54​{
52 return between0And255 (base + strength * 255 / 50); 55​ return between0And255 (base + strength * 255 / 50);
53} 56​}
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76static inline QRgb brightnessContrastGammaForRGB (QRgb rgb, 79​static inline QRgb brightnessContrastGammaForRGB (QRgb rgb,
77 int channels, 80​ int channels,
78 int brightness, int contrast, int gamma) 81​ int brightness, int contrast, int gamma)
79{ 82​{
80 int red = qRed (rgb); 83​ int red = qRed (rgb);
81 int green = qGreen (rgb); 84​ int green = qGreen (rgb);
82 int blue = qBlue (rgb); 85​ int blue = qBlue (rgb);
83 86​
84 if (channels & kpEffectBalance::Red) 87​ if (channels & kpEffectBalance::Red) {
85 red = brightnessContrastGamma (red, brightness, contrast, gamma); 88​ red = brightnessContrastGamma (red, brightness, contrast, gamma);
86 if (channels & kpEffectBalance::Green) 89​ }
90​ if (channels & kpEffectBalance::Green) {
87 green = brightnessContrastGamma (green, brightness, contrast, gamma); 91​ green = brightnessContrastGamma (green, brightness, contrast, gamma);
88 if (channels & kpEffectBalance::Blue) 92​ }
93​ if (channels & kpEffectBalance::Blue) {
89 blue = brightnessContrastGamma (blue, brightness, contrast, gamma); 94​ blue = brightnessContrastGamma (blue, brightness, contrast, gamma);
95​ }
90 96​
91 return qRgba (red, green, blue, qAlpha (rgb)); 97​ return qRgba (red, green, blue, qAlpha (rgb));
92} 98​}
93 99​
94 100​
95// public static 101​// public static
96kpImage kpEffectBalance::applyEffect (const kpImage &image, 102​kpImage kpEffectBalance::applyEffect (const kpImage &image,
97 int channels, 103​ int channels,
98 int brightness, int contrast, int gamma) 104​ int brightness, int contrast, int gamma)
99{ 105​{
100 qCDebug(kpLogImagelib) << "kpEffectBalance::applyEffect(" 106​ qCDebug(kpLogImagelib) << "kpEffectBalance::applyEffect("
101 << "channels=" << channels 107​ << "channels=" << channels
102 << ",brightness=" << brightness 108​ << ",brightness=" << brightness
103 << ",contrast=" << contrast 109​ << ",contrast=" << contrast
104 << ",gamma=" << gamma 110​ << ",gamma=" << gamma
105 << ")" << endl; 111​ << ")";
106 QTime timer; timer.start (); 112​ QTime timer; timer.start ();
107 113​
108 QImage qimage = image; 114​ QImage qimage = image;
109 qCDebug(kpLogImagelib) << "\tconvertToImage=" << timer.restart (); 115​ qCDebug(kpLogImagelib) << "\tconvertToImage=" << timer.restart ();
110 116​
111 quint8 transformRed [256], 117​ quint8 transformRed [256],
112 transformGreen [256], 118​ transformGreen [256],
113 transformBlue [256]; 119​ transformBlue [256];
114 120​
115 for (int i = 0; i < 256; i++) 121​ for (int i = 0; i < 256; i++)
116 { 122​ {
117 quint8 applied = static_cast<quint8> (brightnessContrastGamma (i, brightness, contrast, gamma)); 123​ auto applied = static_cast<quint8> (brightnessContrastGamma (i, brightness, contrast, gamma));
118 124​
119 if (channels & kpEffectBalance::Red) 125​ if (channels & kpEffectBalance::Red) {
120 transformRed [i] = applied; 126​ transformRed [i] = applied;
121 else 127​ }
128​ else {
122 transformRed [i] = static_cast<quint8> (i); 129​ transformRed [i] = static_cast<quint8> (i);
130​ }
123 131​
124 if (channels & kpEffectBalance::Green) 132​ if (channels & kpEffectBalance::Green) {
125 transformGreen [i] = applied; 133​ transformGreen [i] = applied;
126 else 134​ }
135​ else {
127 transformGreen [i] = static_cast<quint8> (i); 136​ transformGreen [i] = static_cast<quint8> (i);
137​ }
128 138​
129 if (channels & kpEffectBalance::Blue) 139​ if (channels & kpEffectBalance::Blue) {
130 transformBlue [i] = applied; 140​ transformBlue [i] = applied;
131 else 141​ }
142​ else {
132 transformBlue [i] = static_cast<quint8> (i); 143​ transformBlue [i] = static_cast<quint8> (i);
133 } 144​ }
145​ }
134 146​
135 qCDebug(kpLogImagelib) << "\tbuild lookup=" << timer.restart (); 147​ qCDebug(kpLogImagelib) << "\tbuild lookup=" << timer.restart ();
136 148​
137 if (qimage.depth () > 8) 149​ if (qimage.depth () > 8)
138 { 150​ {
139 for (int y = 0; y < qimage.height (); y++) 151​ for (int y = 0; y < qimage.height (); y++)
140 { 152​ {
141 for (int x = 0; x < qimage.width (); x++) 153​ for (int x = 0; x < qimage.width (); x++)
142 { 154​ {
143 const QRgb rgb = qimage.pixel (x, y); 155​ const QRgb rgb = qimage.pixel (x, y);
144 156​
145 const quint8 red = static_cast<quint8> (qRed (rgb)); 157​ const auto red = static_cast<quint8> (qRed (rgb));
146 const quint8 green = static_cast<quint8> (qGreen (rgb)); 158​ const auto green = static_cast<quint8> (qGreen (rgb));
147 const quint8 blue = static_cast<quint8> (qBlue (rgb)); 159​ const auto blue = static_cast<quint8> (qBlue (rgb));
148 const quint8 alpha = static_cast<quint8> (qAlpha (rgb)); 160​ const auto alpha = static_cast<quint8> (qAlpha (rgb));
149 161​
150 qimage.setPixel (x, y, 162​ qimage.setPixel (x, y,
151 qRgba (transformRed [red], 163​ qRgba (transformRed [red],
152 transformGreen [green], 164​ transformGreen [green],
153 transformBlue [blue], 165​ transformBlue [blue],
154 alpha)); 166​ alpha));
155 } 167​ }
156 } 168​ }
157 } 169​ }
158 else 170​ else
159 { 171​ {
160 for (int i = 0; i < qimage.colorCount (); i++) 172​ for (int i = 0; i < qimage.colorCount (); i++)
161 { 173​ {
162 const QRgb rgb = qimage.color (i); 174​ const QRgb rgb = qimage.color (i);
163 175​
164 const quint8 red = static_cast<quint8> (qRed (rgb)); 176​ const auto red = static_cast<quint8> (qRed (rgb));
165 const quint8 green = static_cast<quint8> (qGreen (rgb)); 177​ const auto green = static_cast<quint8> (qGreen (rgb));
166 const quint8 blue = static_cast<quint8> (qBlue (rgb)); 178​ const auto blue = static_cast<quint8> (qBlue (rgb));
167 const quint8 alpha = static_cast<quint8> (qAlpha (rgb)); 179​ const auto alpha = static_cast<quint8> (qAlpha (rgb));
168 180​
169 qimage.setColor (i, 181​ qimage.setColor (i,
170 qRgba (transformRed [red], 182​ qRgba (transformRed [red],
171 transformGreen [green], 183​ transformGreen [green],
172 transformBlue [blue], 184​ transformBlue [blue],
173 alpha)); 185​ alpha));
174 } 186​ }
175 187​
176 } 188​ }
177 189​
178 return qimage; 190​ return qimage;
179} 191​}
180 192​