krita
kis_u16_base_colorspace.cc00001
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00018 #include "kdebug.h"
00019
00020 #include "kis_global.h"
00021 #include "kis_abstract_colorspace.h"
00022 #include "kis_integer_maths.h"
00023 #include "kis_u16_base_colorspace.h"
00024
00025
00026 Q_UINT8 KisU16BaseColorSpace::getAlpha(const Q_UINT8 * U8_pixel) const
00027 {
00028 if (m_alphaPos < 0) return OPACITY_OPAQUE;
00029
00030 U8_pixel+= m_alphaPos;
00031
00032 const Q_UINT16 *pixel = reinterpret_cast<const Q_UINT16 *>(U8_pixel);
00033 return UINT16_TO_UINT8(*pixel);
00034 }
00035
00036
00037 void KisU16BaseColorSpace::setAlpha(Q_UINT8 *U8_pixel, Q_UINT8 alpha, Q_INT32 nPixels) const
00038 {
00039 if (m_alphaPos < 0) return;
00040 Q_INT32 psize = pixelSize();
00041
00042
00043 while (nPixels > 0) {
00044
00045 Q_UINT16 *pixel = reinterpret_cast<Q_UINT16 *>(U8_pixel + m_alphaPos);
00046 pixel[0] = UINT8_TO_UINT16(alpha);
00047
00048 --nPixels;
00049 U8_pixel += psize;
00050 }
00051 }
00052
00053 void KisU16BaseColorSpace::multiplyAlpha(Q_UINT8 *U8_pixel, Q_UINT8 U8_alpha, Q_INT32 nPixels)
00054 {
00055 if (m_alphaPos < 0) return;
00056
00057 Q_INT32 psize = pixelSize();
00058 Q_UINT16 alpha = UINT8_TO_UINT16(U8_alpha);
00059
00060 while (nPixels > 0) {
00061
00062 Q_UINT16 *pixelAlpha = reinterpret_cast<Q_UINT16 *>(U8_pixel + m_alphaPos);
00063 *pixelAlpha = UINT16_MULT(*pixelAlpha, alpha);
00064
00065 --nPixels;
00066 U8_pixel += psize;
00067 }
00068 }
00069
00070 void KisU16BaseColorSpace::applyAlphaU8Mask(Q_UINT8 * U8_pixel, Q_UINT8 * alpha8, Q_INT32 nPixels)
00071 {
00072 if (m_alphaPos < 0) return;
00073
00074 Q_INT32 psize = pixelSize();
00075
00076 while (nPixels--) {
00077
00078
00079
00080
00081 Q_UINT16 *pixelAlpha = reinterpret_cast<Q_UINT16 *>(U8_pixel + m_alphaPos);
00082 *pixelAlpha = UINT8_MULT(*pixelAlpha, *alpha8);
00083
00084 ++alpha8;
00085 U8_pixel += psize;
00086
00087 }
00088 }
00089
00090 void KisU16BaseColorSpace::applyInverseAlphaU8Mask(Q_UINT8 * U8_pixels, Q_UINT8 * alpha8, Q_INT32 nPixels)
00091 {
00092
00093 if (m_alphaPos < 0) return;
00094
00095 Q_INT32 psize = pixelSize();
00096
00097
00098 while(nPixels--) {
00099
00100 Q_UINT16 s_alpha8;
00101 Q_UINT32 p_alpha, s_alpha16;
00102
00103 Q_UINT16 *alpha = reinterpret_cast<Q_UINT16 *>(U8_pixels + m_alphaPos);
00104
00105 p_alpha = *(alpha);
00106 s_alpha8 = MAX_SELECTED - *alpha8;
00107 s_alpha16 = UINT8_TO_UINT16(s_alpha8);
00108
00109
00110
00111
00112 alpha[0] = UINT16_MULT(p_alpha, s_alpha16);
00113
00114 U8_pixels += psize;
00115 ++alpha8;
00116 }
00117 }
00118
00119 QString KisU16BaseColorSpace::channelValueText(const Q_UINT8 *U8_pixel, Q_UINT32 channelIndex) const
00120 {
00121 Q_ASSERT(channelIndex < (Q_UINT32)nChannels());
00122 const Q_UINT16 *pixel = reinterpret_cast<const Q_UINT16 *>(U8_pixel);
00123 Q_UINT32 channelPosition = channels()[channelIndex]->pos() / sizeof(Q_UINT16);
00124
00125 return QString().setNum(pixel[channelPosition]);
00126 }
00127
00128 QString KisU16BaseColorSpace::normalisedChannelValueText(const Q_UINT8 *U8_pixel, Q_UINT32 channelIndex) const
00129 {
00130 Q_ASSERT(channelIndex < (Q_UINT32)nChannels());
00131 const Q_UINT16 *pixel = reinterpret_cast<const Q_UINT16 *>(U8_pixel);
00132 Q_UINT32 channelPosition = m_channels[channelIndex]->pos() / sizeof(Q_UINT16);
00133
00134 return QString().setNum(100.0 * static_cast<float>(pixel[channelPosition]) / UINT16_MAX);
00135 }
00136
00137 Q_UINT8 KisU16BaseColorSpace::scaleToU8(const Q_UINT8 * U8_pixel, Q_INT32 channelPos)
00138 {
00139 const Q_UINT16 *pixel = reinterpret_cast<const Q_UINT16 *>(U8_pixel);
00140 return UINT16_TO_UINT8(pixel[channelPos]);
00141 }
00142
00143 Q_UINT16 KisU16BaseColorSpace::scaleToU16(const Q_UINT8 * U8_pixel, Q_INT32 channelPos)
00144 {
00145 const Q_UINT16 *pixel = reinterpret_cast<const Q_UINT16 *>(U8_pixel);
00146 return pixel[channelPos];
00147 }
00148
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