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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/qdrawhelper_p.h>
#ifdef QT_HAVE_NEON
#include <private/qdrawhelper_neon_p.h>
#include <arm_neon.h>
QT_BEGIN_NAMESPACE
static inline int16x8_t qvdiv_255_s16(int16x8_t x, int16x8_t half)
{
// result = (x + (x >> 8) + 0x80) >> 8
const int16x8_t temp = vshrq_n_s16(x, 8); // x >> 8
const int16x8_t sum_part = vaddq_s16(x, half); // x + 0x80
const int16x8_t sum = vaddq_s16(temp, sum_part);
return vreinterpretq_s16_u16(vshrq_n_u16(vreinterpretq_u16_s16(sum), 8));
}
static inline int16x8_t qvbyte_mul_s16(int16x8_t x, int16x8_t alpha, int16x8_t half)
{
// t = qRound(x * alpha / 255.0)
const int16x8_t t = vmulq_s16(x, alpha); // t
return qvdiv_255_s16(t, half);
}
static inline int16x8_t qvinterpolate_pixel_255(int16x8_t x, int16x8_t a, int16x8_t y, int16x8_t b, int16x8_t half)
{
// t = x * a + y * b
const int16x8_t ta = vmulq_s16(x, a);
const int16x8_t tb = vmulq_s16(y, b);
return qvdiv_255_s16(vaddq_s16(ta, tb), half);
}
static inline int16x8_t qvsource_over_s16(int16x8_t src16, int16x8_t dst16, int16x8_t half, int16x8_t full)
{
const int16x4_t alpha16_high = vdup_lane_s16(vget_high_s16(src16), 3);
const int16x4_t alpha16_low = vdup_lane_s16(vget_low_s16(src16), 3);
const int16x8_t alpha16 = vsubq_s16(full, vcombine_s16(alpha16_low, alpha16_high));
return vaddq_s16(src16, qvbyte_mul_s16(dst16, alpha16, half));
}
void qt_blend_argb32_on_argb32_neon(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
const uint *src = (const uint *) srcPixels;
uint *dst = (uint *) destPixels;
int16x8_t half = vdupq_n_s16(0x80);
int16x8_t full = vdupq_n_s16(0xff);
if (const_alpha == 256) {
for (int y = 0; y < h; ++y) {
int x = 0;
for (; x < w-3; x += 4) {
int32x4_t src32 = vld1q_s32((int32_t *)&src[x]);
if ((src[x] & src[x+1] & src[x+2] & src[x+3]) >= 0xff000000) {
// all opaque
vst1q_s32((int32_t *)&dst[x], src32);
} else if (src[x] | src[x+1] | src[x+2] | src[x+3]) {
int32x4_t dst32 = vld1q_s32((int32_t *)&dst[x]);
const uint8x16_t src8 = vreinterpretq_u8_s32(src32);
const uint8x16_t dst8 = vreinterpretq_u8_s32(dst32);
const uint8x8_t src8_low = vget_low_u8(src8);
const uint8x8_t dst8_low = vget_low_u8(dst8);
const uint8x8_t src8_high = vget_high_u8(src8);
const uint8x8_t dst8_high = vget_high_u8(dst8);
const int16x8_t src16_low = vreinterpretq_s16_u16(vmovl_u8(src8_low));
const int16x8_t dst16_low = vreinterpretq_s16_u16(vmovl_u8(dst8_low));
const int16x8_t src16_high = vreinterpretq_s16_u16(vmovl_u8(src8_high));
const int16x8_t dst16_high = vreinterpretq_s16_u16(vmovl_u8(dst8_high));
const int16x8_t result16_low = qvsource_over_s16(src16_low, dst16_low, half, full);
const int16x8_t result16_high = qvsource_over_s16(src16_high, dst16_high, half, full);
const int32x2_t result32_low = vreinterpret_s32_s8(vmovn_s16(result16_low));
const int32x2_t result32_high = vreinterpret_s32_s8(vmovn_s16(result16_high));
vst1q_s32((int32_t *)&dst[x], vcombine_s32(result32_low, result32_high));
}
}
for (; x<w; ++x) {
uint s = src[x];
if (s >= 0xff000000)
dst[x] = s;
else if (s != 0)
dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));
}
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
} else if (const_alpha != 0) {
const_alpha = (const_alpha * 255) >> 8;
int16x8_t const_alpha16 = vdupq_n_s16(const_alpha);
for (int y = 0; y < h; ++y) {
int x = 0;
for (; x < w-3; x += 4) {
if (src[x] | src[x+1] | src[x+2] | src[x+3]) {
int32x4_t src32 = vld1q_s32((int32_t *)&src[x]);
int32x4_t dst32 = vld1q_s32((int32_t *)&dst[x]);
const uint8x16_t src8 = vreinterpretq_u8_s32(src32);
const uint8x16_t dst8 = vreinterpretq_u8_s32(dst32);
const uint8x8_t src8_low = vget_low_u8(src8);
const uint8x8_t dst8_low = vget_low_u8(dst8);
const uint8x8_t src8_high = vget_high_u8(src8);
const uint8x8_t dst8_high = vget_high_u8(dst8);
const int16x8_t src16_low = vreinterpretq_s16_u16(vmovl_u8(src8_low));
const int16x8_t dst16_low = vreinterpretq_s16_u16(vmovl_u8(dst8_low));
const int16x8_t src16_high = vreinterpretq_s16_u16(vmovl_u8(src8_high));
const int16x8_t dst16_high = vreinterpretq_s16_u16(vmovl_u8(dst8_high));
const int16x8_t srcalpha16_low = qvbyte_mul_s16(src16_low, const_alpha16, half);
const int16x8_t srcalpha16_high = qvbyte_mul_s16(src16_high, const_alpha16, half);
const int16x8_t result16_low = qvsource_over_s16(srcalpha16_low, dst16_low, half, full);
const int16x8_t result16_high = qvsource_over_s16(srcalpha16_high, dst16_high, half, full);
const int32x2_t result32_low = vreinterpret_s32_s8(vmovn_s16(result16_low));
const int32x2_t result32_high = vreinterpret_s32_s8(vmovn_s16(result16_high));
vst1q_s32((int32_t *)&dst[x], vcombine_s32(result32_low, result32_high));
}
}
for (; x<w; ++x) {
uint s = src[x];
if (s != 0) {
s = BYTE_MUL(s, const_alpha);
dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));
}
}
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
}
}
// qblendfunctions.cpp
void qt_blend_rgb32_on_rgb32(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha);
void qt_blend_rgb32_on_rgb32_neon(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
if (const_alpha != 256) {
if (const_alpha != 0) {
const uint *src = (const uint *) srcPixels;
uint *dst = (uint *) destPixels;
int16x8_t half = vdupq_n_s16(0x80);
const_alpha = (const_alpha * 255) >> 8;
int one_minus_const_alpha = 255 - const_alpha;
int16x8_t const_alpha16 = vdupq_n_s16(const_alpha);
int16x8_t one_minus_const_alpha16 = vdupq_n_s16(255 - const_alpha);
for (int y = 0; y < h; ++y) {
int x = 0;
for (; x < w-3; x += 4) {
int32x4_t src32 = vld1q_s32((int32_t *)&src[x]);
int32x4_t dst32 = vld1q_s32((int32_t *)&dst[x]);
const uint8x16_t src8 = vreinterpretq_u8_s32(src32);
const uint8x16_t dst8 = vreinterpretq_u8_s32(dst32);
const uint8x8_t src8_low = vget_low_u8(src8);
const uint8x8_t dst8_low = vget_low_u8(dst8);
const uint8x8_t src8_high = vget_high_u8(src8);
const uint8x8_t dst8_high = vget_high_u8(dst8);
const int16x8_t src16_low = vreinterpretq_s16_u16(vmovl_u8(src8_low));
const int16x8_t dst16_low = vreinterpretq_s16_u16(vmovl_u8(dst8_low));
const int16x8_t src16_high = vreinterpretq_s16_u16(vmovl_u8(src8_high));
const int16x8_t dst16_high = vreinterpretq_s16_u16(vmovl_u8(dst8_high));
const int16x8_t result16_low = qvinterpolate_pixel_255(src16_low, const_alpha16, dst16_low, one_minus_const_alpha16, half);
const int16x8_t result16_high = qvinterpolate_pixel_255(src16_high, const_alpha16, dst16_high, one_minus_const_alpha16, half);
const int32x2_t result32_low = vreinterpret_s32_s8(vmovn_s16(result16_low));
const int32x2_t result32_high = vreinterpret_s32_s8(vmovn_s16(result16_high));
vst1q_s32((int32_t *)&dst[x], vcombine_s32(result32_low, result32_high));
}
for (; x<w; ++x) {
uint s = src[x];
s = BYTE_MUL(s, const_alpha);
dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], one_minus_const_alpha);
}
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
}
} else {
qt_blend_rgb32_on_rgb32(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha);
}
}
QT_END_NAMESPACE
#endif // QT_HAVE_NEON
|
