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moz-skia
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(SSE2) acceleration for rectangular opaque erases. 

15% speedup for rectangles < 31 px wide, 5% for larger.

http://codereview.appspot.com/5843050/



git-svn-id: http://skia.googlecode.com/svn/trunk@3423 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
tomhudson@google.com 2012-03-19 13:49:50 +00:00
Родитель 26936d071f
Коммит 8dd90a926a
8 изменённых файлов: 219 добавлений и 11 удалений
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1
gyp/opts.gyp
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@ -40,6 +40,7 @@
'../src/opts/opts_check_SSE2.cpp',
'../src/opts/SkBitmapProcState_opts_SSE2.cpp',
'../src/opts/SkBlitRow_opts_SSE2.cpp',
'../src/opts/SkBlitRect_opts_SSE2.cpp',
'../src/opts/SkUtils_opts_SSE2.cpp',
],
'dependencies': [

25
include/core/SkBlitRow.h
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@ -36,13 +36,6 @@ public:
const SkPMColor* src,
int count, U8CPU alpha, int x, int y);
/** Function pointer that blends a single color with a row of 32-bit colors
onto a 32-bit destination
*/
typedef void (*ColorProc)(SkPMColor* dst, const SkPMColor* src, int count,
SkPMColor color);
//! Public entry-point to return a blit function ptr
static Proc Factory(unsigned flags, SkBitmap::Config);
///////////// D32 version
@ -64,6 +57,12 @@ public:
static Proc32 Factory32(unsigned flags32);
/** Function pointer that blends a single color with a row of 32-bit colors
onto a 32-bit destination
*/
typedef void (*ColorProc)(SkPMColor* dst, const SkPMColor* src, int count,
SkPMColor color);
/** Blend a single color onto a row of S32 pixels, writing the result
into a row of D32 pixels. src and dst may be the same memory, but
if they are not, they may not overlap.
@ -71,8 +70,20 @@ public:
static void Color32(SkPMColor dst[], const SkPMColor src[],
int count, SkPMColor color);
//! Public entry-point to return a blit function ptr
static ColorProc ColorProcFactory();
/** Function pointer that blends a single color onto a 32-bit rectangle. */
typedef void (*ColorRectProc)(SkPMColor* dst, int width, int height,
size_t rowBytes, SkPMColor color);
/** Blend a single color into a rectangle of D32 pixels. */
static void ColorRect32(SkPMColor* dst, int width, int height,
size_t rowBytes, SkPMColor color);
//! Public entry-point to return a blit function ptr
static ColorRectProc ColorRectProcFactory();
/** These static functions are called by the Factory and Factory32
functions, and should return either NULL, or a
platform-specific function-ptr to be used in place of the

20
src/core/SkBlitRow_D32.cpp
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@ -12,6 +12,8 @@
#define UNROLL
SkBlitRow::ColorRectProc PlatformColorRectProcFactory();
static void S32_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
@ -178,3 +180,21 @@ void SkBlitRow::Color32(SkPMColor* SK_RESTRICT dst,
}
}
void SkBlitRow::ColorRect32(SkPMColor* dst, int width, int height,
size_t rowBytes, SkPMColor color) {
SkBlitRow::ColorProc proc = SkBlitRow::ColorProcFactory();
while (--height >= 0) {
(*proc)(dst, dst, width, color);
dst = (SkPMColor*) ((char*)dst + rowBytes);
}
}
SkBlitRow::ColorRectProc SkBlitRow::ColorRectProcFactory() {
SkBlitRow::ColorRectProc proc = PlatformColorRectProcFactory();
if (NULL == proc) {
proc = ColorRect32;
}
SkASSERT(proc);
return proc;
}

13
src/core/SkBlitter_ARGB32.cpp
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@ -53,6 +53,7 @@ SkARGB32_Blitter::SkARGB32_Blitter(const SkBitmap& device, const SkPaint& paint)
fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB);
fColor32Proc = SkBlitRow::ColorProcFactory();
fColorRect32Proc = SkBlitRow::ColorRectProcFactory();
}
const SkBitmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) {
@ -213,10 +214,14 @@ void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) {
uint32_t color = fPMColor;
size_t rowBytes = fDevice.rowBytes();
while (--height >= 0) {
fColor32Proc(device, device, width, color);
device = (uint32_t*)((char*)device + rowBytes);
}
//if (255 == SkGetPackedA32(color)) {
fColorRect32Proc(device, width, height, rowBytes, color);
//} else {
//while (--height >= 0) {
//fColor32Proc(device, device, width, color);
//device = (uint32_t*)((char*)device + rowBytes);
//}
//}
}
#if defined _WIN32 && _MSC_VER >= 1300

1
src/core/SkCoreBlitters.h
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@ -94,6 +94,7 @@ protected:
SkColor fColor;
SkPMColor fPMColor;
SkBlitRow::ColorProc fColor32Proc;
SkBlitRow::ColorRectProc fColorRect32Proc;
private:
unsigned fSrcA, fSrcR, fSrcG, fSrcB;

133
src/opts/SkBlitRect_opts_SSE2.cpp Normal file
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@ -0,0 +1,133 @@
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBlitRect_opts_SSE2.h"
#include "SkBlitRow.h"
#include "SkColorPriv.h"
#include <emmintrin.h>
/** Simple blitting of opaque rectangles less than 31 pixels wide:
inlines and merges sections of Color32_SSE2 and sk_memset32_SSE2.
*/
void BlitRect32_OpaqueNarrow_SSE2(SkPMColor* SK_RESTRICT destination,
int width, int height,
size_t rowBytes, uint32_t color) {
SkASSERT(255 == SkGetPackedA32(color));
SkASSERT(width > 0);
SkASSERT(width < 31);
while (--height >= 0) {
SkPMColor* dst = destination;
int count = width;
while (count > 4) {
*dst++ = color;
*dst++ = color;
*dst++ = color;
*dst++ = color;
count -= 4;
}
while (count > 0) {
*dst++ = color;
--count;
}
destination = (uint32_t*)((char*)destination + rowBytes);
}
}
/**
Fast blitting of opaque rectangles at least 31 pixels wide:
inlines and merges sections of Color32_SSE2 and sk_memset32_SSE2.
A 31 pixel rectangle is guaranteed to have at least one
16-pixel aligned span that can take advantage of mm_store.
*/
void BlitRect32_OpaqueWide_SSE2(SkPMColor* SK_RESTRICT destination,
int width, int height,
size_t rowBytes, uint32_t color) {
SkASSERT(255 == SkGetPackedA32(color));
SkASSERT(width >= 31);
__m128i color_wide = _mm_set1_epi32(color);
while (--height >= 0) {
// Prefetching one row ahead to L1 cache can equal hardware
// performance for large/tall rects, but never *beats*
// hardware performance.
SkPMColor* dst = destination;
int count = width;
while (((size_t)dst) & 0x0F) {
*dst++ = color;
--count;
}
__m128i *d = reinterpret_cast<__m128i*>(dst);
// Googling suggests _mm_stream is only going to beat _mm_store
// for things that wouldn't fit in L2 cache anyway, typically
// >500kB, and precisely fill cache lines. For us, with
// arrays > 100k elements _mm_stream is still 100%+ slower than
// mm_store.
// Unrolling to count >= 64 is a break-even for most
// input patterns; we seem to be saturating the bus and having
// low enough overhead at 32.
while (count >= 32) {
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
count -= 32;
}
if (count >= 16) {
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
_mm_store_si128(d++, color_wide);
count -= 16;
}
dst = reinterpret_cast<uint32_t*>(d);
// Unrolling the loop in the Narrow code is a significant performance
// gain, but unrolling this loop appears to make no difference in
// benchmarks with either mm_store_si128 or individual sets.
while (count > 0) {
*dst++ = color;
--count;
}
destination = (uint32_t*)((char*)destination + rowBytes);
}
}
void ColorRect32_SSE2(SkPMColor* destination,
int width, int height,
size_t rowBytes, uint32_t color) {
if (0 == height || 0 == width || 0 == color) {
return;
}
unsigned colorA = SkGetPackedA32(color);
//if (255 == colorA) {
//if (width < 31) {
//BlitRect32_OpaqueNarrow_SSE2(destination, width, height,
//rowBytes, color);
//} else {
//BlitRect32_OpaqueWide_SSE2(destination, width, height,
//rowBytes, color);
//}
//} else {
SkBlitRow::ColorRect32(destination, width, height, rowBytes, color);
//}
}

24
src/opts/SkBlitRect_opts_SSE2.h Normal file
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@ -0,0 +1,24 @@
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBlitRect_opts_SSE2_DEFINED
#define SkBlitRect_opts_SSE2_DEFINED
/*
These functions' implementations copy sections of both
SkBlitRow_opts_SSE2 and SkUtils_opts_SSE2.
*/
#include "SkColor.h"
void ColorRect32_SSE2(SkPMColor* SK_RESTRICT dst,
int width, int height,
size_t rowBytes, uint32_t color);
#endif

13
src/opts/opts_check_SSE2.cpp
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@ -8,6 +8,9 @@
#include "SkBitmapProcState_opts_SSE2.h"
#include "SkBitmapProcState_opts_SSSE3.h"
#include "SkBlitMask.h"
#include "SkBlitRect.h"
#include "SkBlitRow.h"
#include "SkBlitRect_opts_SSE2.h"
#include "SkBlitRow_opts_SSE2.h"
#include "SkUtils_opts_SSE2.h"
#include "SkUtils.h"
@ -209,3 +212,13 @@ SkMemset32Proc SkMemset32GetPlatformProc() {
return NULL;
}
}
SkBlitRow::ColorRectProc PlatformColorRectProcFactory() {
if (cachedHasSSE2()) {
return ColorRect32_SSE2;
} else {
return NULL;
}
}