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Diffstat (limited to 'src/gui/painting/qcolortrclut_p.h')
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diff --git a/src/gui/painting/qcolortrclut_p.h b/src/gui/painting/qcolortrclut_p.h new file mode 100644 index 0000000000..76a6a60803 --- /dev/null +++ b/src/gui/painting/qcolortrclut_p.h @@ -0,0 +1,287 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QCOLORTRCLUT_P_H +#define QCOLORTRCLUT_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtGui/private/qtguiglobal_p.h> +#include <QtCore/qsharedpointer.h> +#include <QtGui/qrgb.h> +#include <QtGui/qrgba64.h> + +#include <cmath> + +#if defined(__SSE2__) +#include <emmintrin.h> +#elif defined(__ARM_NEON__) || defined(__ARM_NEON) +#include <arm_neon.h> +#endif + +QT_BEGIN_NAMESPACE + +class QColorTransferFunction; +class QColorTransferTable; + +class Q_GUI_EXPORT QColorTrcLut : public QEnableSharedFromThis<QColorTrcLut> +{ +public: + static QColorTrcLut *fromGamma(qreal gamma); + static QColorTrcLut *fromTransferFunction(const QColorTransferFunction &transfn); + static QColorTrcLut *fromTransferTable(const QColorTransferTable &transTable); + + // The following methods all convert opaque or unpremultiplied colors: + + QRgba64 toLinear64(QRgb rgb32) const + { +#if defined(__SSE2__) + __m128i v = _mm_cvtsi32_si128(rgb32); + v = _mm_unpacklo_epi8(v, _mm_setzero_si128()); + const __m128i vidx = _mm_slli_epi16(v, 4); + const int ridx = _mm_extract_epi16(vidx, 2); + const int gidx = _mm_extract_epi16(vidx, 1); + const int bidx = _mm_extract_epi16(vidx, 0); + v = _mm_slli_epi16(v, 8); // a * 256 + v = _mm_insert_epi16(v, m_toLinear[ridx], 0); + v = _mm_insert_epi16(v, m_toLinear[gidx], 1); + v = _mm_insert_epi16(v, m_toLinear[bidx], 2); + v = _mm_add_epi16(v, _mm_srli_epi16(v, 8)); + QRgba64 rgba64; + _mm_storel_epi64(reinterpret_cast<__m128i *>(&rgba64), v); + return rgba64; +#elif (defined(__ARM_NEON__) || defined(__ARM_NEON)) && Q_BYTE_ORDER == Q_LITTLE_ENDIAN + uint8x8_t v8 = vreinterpret_u8_u32(vmov_n_u32(rgb32)); + uint16x4_t v16 = vget_low_u16(vmovl_u8(v8)); + const uint16x4_t vidx = vshl_n_u16(v16, 4); + const int ridx = vget_lane_u16(vidx, 2); + const int gidx = vget_lane_u16(vidx, 1); + const int bidx = vget_lane_u16(vidx, 0); + v16 = vshl_n_u16(v16, 8); // a * 256 + v16 = vset_lane_u16(m_toLinear[ridx], v16, 0); + v16 = vset_lane_u16(m_toLinear[gidx], v16, 1); + v16 = vset_lane_u16(m_toLinear[bidx], v16, 2); + v16 = vadd_u16(v16, vshr_n_u16(v16, 8)); + return QRgba64::fromRgba64(vget_lane_u64(vreinterpret_u64_u16(v16), 0)); +#else + uint r = m_toLinear[qRed(rgb32) << 4]; + uint g = m_toLinear[qGreen(rgb32) << 4]; + uint b = m_toLinear[qBlue(rgb32) << 4]; + r = r + (r >> 8); + g = g + (g >> 8); + b = b + (b >> 8); + return QRgba64::fromRgba64(r, g, b, qAlpha(rgb32) * 257); +#endif + } + + QRgb toLinear(QRgb rgb32) const + { + return convertWithTable(rgb32, m_toLinear); + } + + QRgba64 toLinear(QRgba64 rgb64) const + { + return convertWithTable(rgb64, m_toLinear); + } + + float u8ToLinearF32(int c) const + { + ushort v = m_toLinear[c << 4]; + return v * (1.0f / (255*256)); + } + + float u16ToLinearF32(int c) const + { + c -= (c >> 8); + ushort v = m_toLinear[c >> 4]; + return v * (1.0f / (255*256)); + } + + float toLinear(float f) const + { + ushort v = m_toLinear[(int)(f * (255 * 16) + 0.5f)]; + return v * (1.0f / (255*256)); + } + + QRgb fromLinear64(QRgba64 rgb64) const + { +#if defined(__SSE2__) + __m128i v = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(&rgb64)); + v = _mm_sub_epi16(v, _mm_srli_epi16(v, 8)); + const __m128i vidx = _mm_srli_epi16(v, 4); + const int ridx = _mm_extract_epi16(vidx, 0); + const int gidx = _mm_extract_epi16(vidx, 1); + const int bidx = _mm_extract_epi16(vidx, 2); + v = _mm_insert_epi16(v, m_fromLinear[ridx], 2); + v = _mm_insert_epi16(v, m_fromLinear[gidx], 1); + v = _mm_insert_epi16(v, m_fromLinear[bidx], 0); + v = _mm_add_epi16(v, _mm_set1_epi16(0x80)); + v = _mm_srli_epi16(v, 8); + v = _mm_packus_epi16(v, v); + return _mm_cvtsi128_si32(v); +#elif (defined(__ARM_NEON__) || defined(__ARM_NEON)) && Q_BYTE_ORDER == Q_LITTLE_ENDIAN + uint16x4_t v = vreinterpret_u16_u64(vmov_n_u64(rgb64)); + v = vsub_u16(v, vshr_n_u16(v, 8)); + const uint16x4_t vidx = vshr_n_u16(v, 4); + const int ridx = vget_lane_u16(vidx, 0); + const int gidx = vget_lane_u16(vidx, 1); + const int bidx = vget_lane_u16(vidx, 2); + v = vset_lane_u16(m_fromLinear[ridx], v, 2); + v = vset_lane_u16(m_fromLinear[gidx], v, 1); + v = vset_lane_u16(m_fromLinear[bidx], v, 0); + uint8x8_t v8 = vrshrn_n_u16(vcombine_u16(v, v), 8); + return vget_lane_u32(vreinterpret_u32_u8(v8), 0); +#else + uint a = rgb64.alpha(); + uint r = rgb64.red(); + uint g = rgb64.green(); + uint b = rgb64.blue(); + a = a - (a >> 8); + r = r - (r >> 8); + g = g - (g >> 8); + b = b - (b >> 8); + a = (a + 0x80) >> 8; + r = (m_fromLinear[r >> 4] + 0x80) >> 8; + g = (m_fromLinear[g >> 4] + 0x80) >> 8; + b = (m_fromLinear[b >> 4] + 0x80) >> 8; + return (a << 24) | (r << 16) | (g << 8) | b; +#endif + } + + QRgb fromLinear(QRgb rgb32) const + { + return convertWithTable(rgb32, m_fromLinear); + } + + QRgba64 fromLinear(QRgba64 rgb64) const + { + return convertWithTable(rgb64, m_fromLinear); + } + + int u8FromLinearF32(float f) const + { + ushort v = m_fromLinear[(int)(f * (255 * 16) + 0.5f)]; + return (v + 0x80) >> 8; + } + int u16FromLinearF32(float f) const + { + ushort v = m_fromLinear[(int)(f * (255 * 16) + 0.5f)]; + return v + (v >> 8); + } + float fromLinear(float f) const + { + ushort v = m_fromLinear[(int)(f * (255 * 16) + 0.5f)]; + return v * (1.0f / (255*256)); + } + + // We translate to 0-65280 (255*256) instead to 0-65535 to make simple + // shifting an accurate conversion. + // We translate from 0-4080 (255*16) for the same speed up, and to keep + // the tables small enough to fit in most inner caches. + ushort m_toLinear[(255 * 16) + 1]; // [0-4080] -> [0-65280] + ushort m_fromLinear[(255 * 16) + 1]; // [0-4080] -> [0-65280] + +private: + QColorTrcLut() { } + + Q_ALWAYS_INLINE static QRgb convertWithTable(QRgb rgb32, const ushort *table) + { + const int r = (table[qRed(rgb32) << 4] + 0x80) >> 8; + const int g = (table[qGreen(rgb32) << 4] + 0x80) >> 8; + const int b = (table[qBlue(rgb32) << 4] + 0x80) >> 8; + return (rgb32 & 0xff000000) | (r << 16) | (g << 8) | b; + } + Q_ALWAYS_INLINE static QRgba64 convertWithTable(QRgba64 rgb64, const ushort *table) + { +#if defined(__SSE2__) + __m128i v = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(&rgb64)); + v = _mm_sub_epi16(v, _mm_srli_epi16(v, 8)); + const __m128i vidx = _mm_srli_epi16(v, 4); + const int ridx = _mm_extract_epi16(vidx, 2); + const int gidx = _mm_extract_epi16(vidx, 1); + const int bidx = _mm_extract_epi16(vidx, 0); + v = _mm_insert_epi16(v, table[ridx], 2); + v = _mm_insert_epi16(v, table[gidx], 1); + v = _mm_insert_epi16(v, table[bidx], 0); + v = _mm_add_epi16(v, _mm_srli_epi16(v, 8)); + QRgba64 rgba64; + _mm_storel_epi64(reinterpret_cast<__m128i *>(&rgba64), v); + return rgba64; +#elif (defined(__ARM_NEON__) || defined(__ARM_NEON)) && Q_BYTE_ORDER == Q_LITTLE_ENDIAN + uint16x4_t v = vreinterpret_u16_u64(vmov_n_u64(rgb64)); + v = vsub_u16(v, vshr_n_u16(v, 8)); + const uint16x4_t vidx = vshr_n_u16(v, 4); + const int ridx = vget_lane_u16(vidx, 2); + const int gidx = vget_lane_u16(vidx, 1); + const int bidx = vget_lane_u16(vidx, 0); + v = vset_lane_u16(table[ridx], v, 2); + v = vset_lane_u16(table[gidx], v, 1); + v = vset_lane_u16(table[bidx], v, 0); + v = vadd_u16(v, vshr_n_u16(v, 8)); + return QRgba64::fromRgba64(vget_lane_u64(vreinterpret_u64_u16(v), 0)); +#else + ushort r = rgb64.red(); + ushort g = rgb64.green(); + ushort b = rgb64.blue(); + r = r - (r >> 8); + g = g - (g >> 8); + b = b - (b >> 8); + r = table[r >> 4]; + g = table[g >> 4]; + b = table[b >> 4]; + r = r + (r >> 8); + g = g + (g >> 8); + b = b + (b >> 8); + return QRgba64::fromRgba64(r, g, b, rgb64.alpha()); +#endif + } +}; + +QT_END_NAMESPACE + +#endif // QCOLORTRCLUT_P_H |