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Enable highQualityFilter_SSE2

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With SSE2, bitmap_BGRA_8888_A_scale_rotate_bicubic gains about 40%
performance improvement on desktop i7-3770.

BUG=skia:
R=mtklein@google.com, humper@google.com

Author: qiankun.miao@intel.com

Review URL: https://codereview.chromium.org/525283002
This commit is contained in:
qiankun.miao 2014-09-03 08:24:12 -07:00 committed by Commit bot
parent b0bd4f64a6
commit b381fa10d8
2 changed files with 28 additions and 30 deletions
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52
src/opts/SkBitmapFilter_opts_SSE2.cpp
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@ -46,45 +46,45 @@ static inline void print128f(__m128 value) {
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;
const int maxX = s.fBitmap->width();
const int maxY = s.fBitmap->height();
SkAutoTMalloc<SkScalar> xWeights(maxX);
while (count-- > 0) {
SkPoint srcPt;
s.fInvProc(s.fInvMatrix, SkIntToScalar(x),
SkIntToScalar(y), &srcPt);
s.fInvProc(s.fInvMatrix, x + 0.5f, y + 0.5f, &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)));
int y0 = SkClampMax(SkScalarCeilToInt(srcPt.fY-s.getBitmapFilter()->width()), maxY);
int y1 = SkClampMax(SkScalarFloorToInt(srcPt.fY+s.getBitmapFilter()->width()+1), maxY);
int x0 = SkClampMax(SkScalarCeilToInt(srcPt.fX-s.getBitmapFilter()->width()), maxX);
int x1 = SkClampMax(SkScalarFloorToInt(srcPt.fX+s.getBitmapFilter()->width())+1, maxX);
for (int src_y = y0; src_y <= y1; src_y++) {
float yweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fY - src_y));
for (int srcX = x0; srcX < x1 ; srcX++) {
// Looking these up once instead of each loop is a ~15% speedup.
xWeights[srcX - x0] = s.getBitmapFilter()->lookupScalar((srcPt.fX - srcX));
}
for (int src_x = x0; src_x <= x1 ; src_x++) {
float xweight = SkScalarToFloat(s.getBitmapFilter()->lookupScalar(srcPt.fX - src_x));
for (int srcY = y0; srcY < y1; srcY++) {
SkScalar yWeight = s.getBitmapFilter()->lookupScalar((srcPt.fY - srcY));
float combined_weight = xweight * yweight;
for (int srcX = x0; srcX < x1 ; srcX++) {
SkScalar xWeight = xWeights[srcX - x0];
SkPMColor color = *s.fBitmap->getAddr32(src_x, src_y);
SkScalar combined_weight = SkScalarMul(xWeight, yWeight);
SkPMColor color = *s.fBitmap->getAddr32(srcX, srcY);
__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 );
}
@ -92,15 +92,13 @@ void highQualityFilter_SSE2(const SkBitmapProcState& s, int x, int y,
accum = _mm_div_ps(accum, weight);
accum = _mm_add_ps(accum, _mm_set1_ps(0.5f));
__m128i accumInt = _mm_cvttps_epi32(accum);
__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);
int* localResult = (int*)(&accumInt);
int a = SkClampMax(localResult[3], 255);
int r = SkClampMax(localResult[2], a);
int g = SkClampMax(localResult[1], a);
int b = SkClampMax(localResult[0], a);
*colors++ = SkPackARGB32(a, r, g, b);

2
src/opts/opts_check_x86.cpp
View File

@ -123,7 +123,7 @@ static inline bool supports_simd(int minLevel) {
////////////////////////////////////////////////////////////////////////////////
SK_CONF_DECLARE( bool, c_hqfilter_sse, "bitmap.filter.highQualitySSE", false, "Use SSE optimized version of high quality image filters");
SK_CONF_DECLARE( bool, c_hqfilter_sse, "bitmap.filter.highQualitySSE", true, "Use SSE optimized version of high quality image filters");
void SkBitmapScaler::PlatformConvolutionProcs(SkConvolutionProcs* procs) {
if (supports_simd(SK_CPU_SSE_LEVEL_SSE2)) {