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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapProcState.h"
#include "SkBitmap.h"
#include "SkColor.h"
#include "SkColorPriv.h"
#include "SkUnPreMultiply.h"
#include "SkShader.h"
#include "SkBitmapFilter_opts_SSE2.h"
#include <emmintrin.h>
#if 0
static inline void print128i(__m128i value) {
int *v = (int*) &value;
printf("% .11d % .11d % .11d % .11d\n", v[0], v[1], v[2], v[3]);
}
static inline void print128i_16(__m128i value) {
short *v = (short*) &value;
printf("% .5d % .5d % .5d % .5d % .5d % .5d % .5d % .5d\n", v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]);
}
static inline void print128i_8(__m128i value) {
unsigned char *v = (unsigned char*) &value;
printf("%.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u %.3u\n",
v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7],
v[8], v[9], v[10], v[11], v[12], v[13], v[14], v[15]
);
}
static inline void print128f(__m128 value) {
float *f = (float*) &value;
printf("%3.4f %3.4f %3.4f %3.4f\n", f[0], f[1], f[2], f[3]);
}
#endif
// because the border is handled specially, this is guaranteed to have all 16 pixels
// available to it without running off the bitmap's edge.
int debug_x = 20;
int debug_y = 255;
void highQualityFilter_SSE2(const SkBitmapProcState& s, int x, int y,
SkPMColor* SK_RESTRICT colors, int count) {
const int maxX = s.fBitmap->width() - 1;
const int maxY = s.fBitmap->height() - 1;
while (count-- > 0) {
SkPoint srcPt;
s.fInvProc(s.fInvMatrix, SkIntToScalar(x),
SkIntToScalar(y), &srcPt);
srcPt.fX -= SK_ScalarHalf;
srcPt.fY -= SK_ScalarHalf;
int sx = SkScalarFloorToInt(srcPt.fX);
int sy = SkScalarFloorToInt(srcPt.fY);
__m128 weight = _mm_setzero_ps();
__m128 accum = _mm_setzero_ps();
int y0 = SkTMax(0, int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)));
int y1 = SkTMin(maxY, int(floor(sy+s.getBitmapFilter()->width() + 0.5f)));
int x0 = SkTMax(0, int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)));
int x1 = SkTMin(maxX, int(floor(sx+s.getBitmapFilter()->width() + 0.5f)));
for (int src_y = y0; src_y <= y1; src_y++) {
float yweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fY - src_y));
for (int src_x = x0; src_x <= x1 ; src_x++) {
float xweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fX - src_x));
float combined_weight = xweight * yweight;
SkPMColor color = *s.fBitmap->getAddr32(src_x, src_y);
__m128i c = _mm_cvtsi32_si128( color );
c = _mm_unpacklo_epi8(c, _mm_setzero_si128());
c = _mm_unpacklo_epi16(c, _mm_setzero_si128());
__m128 cfloat = _mm_cvtepi32_ps( c );
__m128 weightVector = _mm_set1_ps(combined_weight);
accum = _mm_add_ps(accum, _mm_mul_ps(cfloat, weightVector));
weight = _mm_add_ps( weight, weightVector );
}
}
accum = _mm_div_ps(accum, weight);
accum = _mm_add_ps(accum, _mm_set1_ps(0.5f));
__m128i accumInt = _mm_cvtps_epi32( accum );
int localResult[4];
_mm_storeu_si128((__m128i *) (localResult), accumInt);
int a = SkClampMax(localResult[0], 255);
int r = SkClampMax(localResult[1], a);
int g = SkClampMax(localResult[2], a);
int b = SkClampMax(localResult[3], a);
*colors++ = SkPackARGB32(a, r, g, b);
x++;
}
}
void highQualityFilter_ScaleOnly_SSE2(const SkBitmapProcState &s, int x, int y,
SkPMColor *SK_RESTRICT colors, int count) {
const int maxX = s.fBitmap->width() - 1;
const int maxY = s.fBitmap->height() - 1;
SkPoint srcPt;
s.fInvProc(s.fInvMatrix, SkIntToScalar(x),
SkIntToScalar(y), &srcPt);
srcPt.fY -= SK_ScalarHalf;
int sy = SkScalarFloorToInt(srcPt.fY);
int y0 = SkTMax(0, int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)));
int y1 = SkTMin(maxY, int(floor(sy+s.getBitmapFilter()->width() + 0.5f)));
while (count-- > 0) {
srcPt.fX -= SK_ScalarHalf;
srcPt.fY -= SK_ScalarHalf;
int sx = SkScalarFloorToInt(srcPt.fX);
float weight = 0;
__m128 accum = _mm_setzero_ps();
int x0 = SkTMax(0, int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)));
int x1 = SkTMin(maxX, int(floor(sx+s.getBitmapFilter()->width() + 0.5f)));
for (int src_y = y0; src_y <= y1; src_y++) {
float yweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fY - src_y));
for (int src_x = x0; src_x <= x1 ; src_x++) {
float xweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fX - src_x));
float combined_weight = xweight * yweight;
SkPMColor color = *s.fBitmap->getAddr32(src_x, src_y);
__m128 c = _mm_set_ps((float)SkGetPackedB32(color),
(float)SkGetPackedG32(color),
(float)SkGetPackedR32(color),
(float)SkGetPackedA32(color));
__m128 weightVector = _mm_set1_ps(combined_weight);
accum = _mm_add_ps(accum, _mm_mul_ps(c, weightVector));
weight += combined_weight;
}
}
__m128 totalWeightVector = _mm_set1_ps(weight);
accum = _mm_div_ps(accum, totalWeightVector);
accum = _mm_add_ps(accum, _mm_set1_ps(0.5f));
float localResult[4];
_mm_storeu_ps(localResult, accum);
int a = SkClampMax(int(localResult[0]), 255);
int r = SkClampMax(int(localResult[1]), a);
int g = SkClampMax(int(localResult[2]), a);
int b = SkClampMax(int(localResult[3]), a);
*colors++ = SkPackARGB32(a, r, g, b);
x++;
s.fInvProc(s.fInvMatrix, SkIntToScalar(x),
SkIntToScalar(y), &srcPt);
}
}
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