AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

New bitmap filter checkin; this time with less build breakage

Browse Source 
BUG=

Review URL: https://codereview.chromium.org/18942002

git-svn-id: http://skia.googlecode.com/svn/trunk@9944 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
humper@google.com 2013-07-09 21:37:14 +00:00
parent 6e8b7ddefd
commit b088947f27
18 changed files with 1048 additions and 219 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
bench/BitmapBench.cpp
View File

@ -149,7 +149,7 @@ protected:
int count = N;
#ifdef SK_RELEASE
// in DEBUG, N is always 1
if (paint.getFlags() & SkPaint::kBicubicFilterBitmap_Flag) {
if (paint.getFlags() & SkPaint::kHighQualityFilterBitmap_Flag) {
count /= BICUBIC_DUR_SCALE;
}
#endif
@ -170,7 +170,7 @@ protected:
#ifdef SK_DEBUG
return 1;
#else
return (paint.getFlags() & SkPaint::kBicubicFilterBitmap_Flag) ?
return (paint.getFlags() & SkPaint::kHighQualityFilterBitmap_Flag) ?
(float)BICUBIC_DUR_SCALE : 1;
#endif
}
@ -266,12 +266,12 @@ protected:
}
uint32_t orMask = 0;
uint32_t clearMask = SkPaint::kFilterBitmap_Flag | SkPaint::kBicubicFilterBitmap_Flag;
uint32_t clearMask = SkPaint::kFilterBitmap_Flag | SkPaint::kHighQualityFilterBitmap_Flag;
if (fFlags & kBilerp_Flag) {
orMask |= SkPaint::kFilterBitmap_Flag;
}
if (fFlags & kBicubic_Flag) {
orMask |= SkPaint::kBicubicFilterBitmap_Flag;
orMask |= SkPaint::kHighQualityFilterBitmap_Flag;
}
this->setPaintMasks(orMask, clearMask);

135
bench/BitmapScaleBench.cpp Normal file
View File

@ -0,0 +1,135 @@
/*
* 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 "SkBenchmark.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkRandom.h"
#include "SkShader.h"
#include "SkString.h"
#include "SkBlurMask.h"
class BitmapScaleBench: public SkBenchmark {
int fLoopCount;
int fInputSize;
int fOutputSize;
SkString fName;
public:
BitmapScaleBench(void *param, int is, int os) : INHERITED(param) {
fInputSize = is;
fOutputSize = os;
fLoopCount = 100;
}
protected:
SkBitmap fInputBitmap, fOutputBitmap;
SkMatrix fMatrix;
virtual const char* onGetName() {
return fName.c_str();
}
int inputSize() const {
return fInputSize;
}
int outputSize() const {
return fOutputSize;
}
float scale() const {
return float(outputSize())/inputSize();
}
SkIPoint onGetSize() SK_OVERRIDE {
return SkIPoint::Make( fOutputSize, fOutputSize );
}
void setName(const char * name) {
fName.printf( "bitmap_scale_%s_%d_%d", name, fInputSize, fOutputSize );
}
virtual void onPreDraw() {
fInputBitmap.setConfig(SkBitmap::kARGB_8888_Config, fInputSize, fInputSize);
fInputBitmap.allocPixels();
fInputBitmap.eraseColor(SK_ColorWHITE);
fInputBitmap.setIsOpaque(true);
fOutputBitmap.setConfig(SkBitmap::kARGB_8888_Config, fOutputSize, fOutputSize);
fOutputBitmap.allocPixels();
fOutputBitmap.setIsOpaque(true);
fMatrix.setScale( scale(), scale() );
}
virtual void onDraw(SkCanvas*) {
SkPaint paint;
this->setupPaint(&paint);
preBenchSetup();
for (int i = 0; i < SkBENCHLOOP(fLoopCount); i++) {
doScaleImage();
}
}
virtual void doScaleImage() = 0;
virtual void preBenchSetup() {}
private:
typedef SkBenchmark INHERITED;
};
class BitmapFilterScaleBench: public BitmapScaleBench {
public:
BitmapFilterScaleBench(void *param, int is, int os) : INHERITED(param, is, os) {
setName( "filter" );
}
protected:
virtual void doScaleImage() SK_OVERRIDE {
SkCanvas canvas( fOutputBitmap );
SkPaint paint;
paint.setFlags( SkPaint::kHighQualityFilterBitmap_Flag | SkPaint::kFilterBitmap_Flag );
canvas.drawBitmapMatrix( fInputBitmap, fMatrix, &paint );
}
private:
typedef BitmapScaleBench INHERITED;
};
class BitmapDirectScaleBench: public BitmapScaleBench {
public:
BitmapDirectScaleBench(void *param, int is, int os) : INHERITED(param, is, os) {
setName( "direct" );
}
protected:
virtual void doScaleImage() SK_OVERRIDE {
fInputBitmap.scale( &fOutputBitmap );
}
private:
typedef BitmapScaleBench INHERITED;
};
DEF_BENCH(return new BitmapFilterScaleBench(p, 10, 90);)
DEF_BENCH(return new BitmapFilterScaleBench(p, 30, 90);)
DEF_BENCH(return new BitmapFilterScaleBench(p, 80, 90);)
// DEF_BENCH(return new BitmapFilterScaleBench(p, 90, 90);)
// DEF_BENCH(return new BitmapFilterScaleBench(p, 90, 80);)
// DEF_BENCH(return new BitmapFilterScaleBench(p, 90, 30);)
// DEF_BENCH(return new BitmapFilterScaleBench(p, 90, 10);)
DEF_BENCH(return new BitmapDirectScaleBench(p, 10, 90);)
DEF_BENCH(return new BitmapDirectScaleBench(p, 30, 90);)
DEF_BENCH(return new BitmapDirectScaleBench(p, 80, 90);)
// DEF_BENCH(return new BitmapDirectScaleBench(p, 90, 90);)
// DEF_BENCH(return new BitmapDirectScaleBench(p, 90, 80);)
// DEF_BENCH(return new BitmapDirectScaleBench(p, 90, 30);)
// DEF_BENCH(return new BitmapDirectScaleBench(p, 90, 10);)

30
gm/filterbitmap.cpp
View File

@ -35,7 +35,7 @@ static void draw_col(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat,
canvas->translate(dx, 0);
canvas->drawBitmapMatrix(bm, mat, &paint);
paint.setFlags(paint.getFlags() | SkPaint::kBicubicFilterBitmap_Flag);
paint.setFlags(paint.getFlags() | SkPaint::kHighQualityFilterBitmap_Flag);
canvas->translate(dx, 0);
canvas->drawBitmapMatrix(bm, mat, &paint);
}
@ -64,7 +64,7 @@ public:
this->setBGColor(0xFFDDDDDD);
}
void setName( const char name[] ) {
void setName(const char name[]) {
fName.set(name);
}
@ -99,12 +99,12 @@ private:
class FilterBitmapTextGM: public FilterBitmapGM {
public:
FilterBitmapTextGM( float textSize )
: fTextSize( textSize )
FilterBitmapTextGM(float textSize)
: fTextSize(textSize)
{
char name[1024];
sprintf( name, "filterbitmap_text_%.2fpt", fTextSize );
setName( name );
sprintf(name, "filterbitmap_text_%.2fpt", fTextSize);
setName(name);
}
protected:
@ -140,12 +140,12 @@ class FilterBitmapTextGM: public FilterBitmapGM {
class FilterBitmapCheckerboardGM: public FilterBitmapGM {
public:
FilterBitmapCheckerboardGM( int size, int num_checks )
: fSize( size ), fNumChecks( num_checks )
FilterBitmapCheckerboardGM(int size, int num_checks)
: fSize(size), fNumChecks(num_checks)
{
char name[1024];
sprintf( name, "filterbitmap_checkerboard_%d_%d", fSize, fNumChecks );
setName( name );
sprintf(name, "filterbitmap_checkerboard_%d_%d", fSize, fNumChecks);
setName(name);
}
protected:
@ -179,12 +179,12 @@ class FilterBitmapCheckerboardGM: public FilterBitmapGM {
class FilterBitmapImageGM: public FilterBitmapGM {
public:
FilterBitmapImageGM( const char filename[] )
: fFilename( filename )
FilterBitmapImageGM(const char filename[])
: fFilename(filename)
{
char name[1024];
sprintf( name, "filterbitmap_image_%s", filename );
setName( name );
sprintf(name, "filterbitmap_image_%s", filename);
setName(name);
}
protected:
@ -197,7 +197,7 @@ class FilterBitmapImageGM: public FilterBitmapGM {
void make_bitmap() SK_OVERRIDE {
SkString path(skiagm::GM::gResourcePath);
path.append( "/" );
path.append("/");
path.append(fFilename);
SkImageDecoder *codec = NULL;

114
gm/scalebitmap.cpp Normal file
View File

@ -0,0 +1,114 @@
/*
* 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 "gm.h"
#include "SkImageDecoder.h"
#include "SkStream.h"
class ScaleBitmapGM : public skiagm::GM {
public:
ScaleBitmapGM(const char filename[], float scale)
: fFilename(filename), fScale(scale)
{
this->setBGColor(0xFFDDDDDD);
fName.printf("scalebitmap_%s_%f", filename, scale);
SkString path(skiagm::GM::gResourcePath);
path.append("/");
path.append(fFilename);
SkImageDecoder *codec = NULL;
SkFILEStream stream(path.c_str());
if (stream.isValid()) {
codec = SkImageDecoder::Factory(&stream);
}
if (codec) {
stream.rewind();
codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode);
SkDELETE(codec);
} else {
fBM.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
fBM.allocPixels();
*(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
}
fSize = fBM.height();
}
protected:
SkBitmap fBM;
SkString fName;
SkString fFilename;
int fSize;
float fScale;
virtual SkString onShortName() SK_OVERRIDE {
return fName;
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(fBM.width() * fScale, fBM.height() * fScale);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkBitmap dst;
dst.setConfig(SkBitmap::kARGB_8888_Config, fBM.width() * fScale, fBM.height() * fScale);
dst.allocPixels();
fBM.scale(&dst);
canvas->drawBitmap(dst, 0, 0);
}
private:
typedef skiagm::GM INHERITED;
};
class ScaleBitmapMipmapGM: public ScaleBitmapGM {
SkMatrix fMatrix;
public:
ScaleBitmapMipmapGM(const char filename[], float scale)
: INHERITED(filename, scale)
{
fName.printf("scalebitmap_mipmap_%s_%f", filename, scale);
fBM.buildMipMap();
fMatrix.setScale(scale, scale);
}
protected:
virtual void onDraw(SkCanvas *canvas) SK_OVERRIDE {
SkPaint paint;
paint.setFilterBitmap(true);
canvas->drawBitmapMatrix(fBM, fMatrix, &paint);
}
private:
typedef ScaleBitmapGM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ScaleBitmapGM("mandrill_128.png", 2); )
DEF_GM( return new ScaleBitmapGM("mandrill_64.png", 4); )
DEF_GM( return new ScaleBitmapGM("mandrill_32.png", 8); )
DEF_GM( return new ScaleBitmapGM("mandrill_16.png", 16); )
DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.5f); )
DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.25f); )
DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.125f); )
DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.0625f); )
DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.5f); )
DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.25f); )
DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.125f); )
DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.0625f); )

1
gyp/bench.gypi
View File

@ -5,7 +5,6 @@
'../bench/benchmain.cpp',
'../bench/SkBenchmark.h',
'../bench/SkBenchmark.cpp',
'../bench/AAClipBench.cpp',
'../bench/BicubicBench.cpp',
'../bench/BitmapBench.cpp',

3
gyp/core.gypi
View File

@ -21,13 +21,14 @@
'<(skia_src_path)/core/SkBBoxHierarchyRecord.cpp',
'<(skia_src_path)/core/SkBBoxHierarchyRecord.h',
'<(skia_src_path)/core/SkBitmap.cpp',
'<(skia_src_path)/core/SkBitmapFilter.h',
'<(skia_src_path)/core/SkBitmapFilter.cpp',
'<(skia_src_path)/core/SkBitmapHeap.cpp',
'<(skia_src_path)/core/SkBitmapHeap.h',
'<(skia_src_path)/core/SkBitmapProcShader.cpp',
'<(skia_src_path)/core/SkBitmapProcShader.h',
'<(skia_src_path)/core/SkBitmapProcState.cpp',
'<(skia_src_path)/core/SkBitmapProcState.h',
'<(skia_src_path)/core/SkBitmapProcBicubic.cpp',
'<(skia_src_path)/core/SkBitmapProcState_matrix.h',
'<(skia_src_path)/core/SkBitmapProcState_matrixProcs.cpp',
'<(skia_src_path)/core/SkBitmapProcState_sample.h',

1
gyp/gmslides.gypi
View File

@ -90,6 +90,7 @@
'../gm/rrects.cpp',
'../gm/roundrects.cpp',
'../gm/samplerstress.cpp',
# '../gm/scalebitmap.cpp',
'../gm/shaderbounds.cpp',
'../gm/selftest.cpp',
'../gm/shadertext.cpp',

4
gyp/opts.gyp
View File

@ -43,9 +43,13 @@
],
}],
],
'include_dirs': [
'../include/utils',
],
'sources': [
'../src/opts/opts_check_SSE2.cpp',
'../src/opts/SkBitmapProcState_opts_SSE2.cpp',
'../src/opts/SkBitmapFilter_opts_SSE2.cpp',
'../src/opts/SkBlitRow_opts_SSE2.cpp',
'../src/opts/SkBlitRect_opts_SSE2.cpp',
'../src/opts/SkUtils_opts_SSE2.cpp',

14
include/core/SkBitmap.h
View File

@ -538,7 +538,7 @@ public:
by calling copyTo().
*/
bool canCopyTo(Config newConfig) const;
/**
* DEPRECATED -- will be replaced with API on SkPaint
*/
@ -702,6 +702,18 @@ private:
int extractMipLevel(SkBitmap* dst, SkFixed sx, SkFixed sy);
bool hasMipMap() const;
void freeMipMap();
/** Make a scaled copy of this bitmap into the provided destination.
* The caller is responsible for having set the width and height of the
* provided destination bitmap, and also having allocated its pixel
* memory.
*
* This function is temporary and for testing purposes only; it will
* likely move once it has been properly plumbed into the bitmap
* shader infrastructure.
*/
void scale(SkBitmap *dst) const;
friend struct SkBitmapProcState;
};

5
include/core/SkPaint.h
View File

@ -43,11 +43,14 @@ typedef const SkGlyph& (*SkDrawCacheProc)(SkGlyphCache*, const char**,
typedef const SkGlyph& (*SkMeasureCacheProc)(SkGlyphCache*, const char**);
#define kBicubicFilterBitmap_Flag kHighQualityFilterBitmap_Flag
/** \class SkPaint
The SkPaint class holds the style and color information about how to draw
geometries, text and bitmaps.
*/
class SK_API SkPaint {
public:
SkPaint();
@ -108,7 +111,7 @@ public:
kAutoHinting_Flag = 0x800, //!< mask to force Freetype's autohinter
kVerticalText_Flag = 0x1000,
kGenA8FromLCD_Flag = 0x2000, // hack for GDI -- do not use if you can help it
kBicubicFilterBitmap_Flag = 0x4000, // temporary flag
kHighQualityFilterBitmap_Flag = 0x4000, // temporary flag
kHighQualityDownsampleBitmap_Flag = 0x8000, // temporary flag
// when adding extra flags, note that the fFlags member is specified

374
src/core/SkBitmapFilter.cpp Normal file
View File

@ -0,0 +1,374 @@
/*
* 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 "SkRTConf.h"
#include "SkMath.h"
void highQualityFilter(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);
SkFixed weight = 0;
SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
int y0 = SkClampMax(int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)), maxY);
int y1 = SkClampMax(int(floor(sy+s.getBitmapFilter()->width() + 0.5f)), maxY);
int x0 = SkClampMax(int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)), maxX);
int x1 = SkClampMax(int(floor(sx+s.getBitmapFilter()->width() + 0.5f)), maxX);
for (int src_y = y0; src_y <= y1; src_y++) {
SkFixed yweight = s.getBitmapFilter()->lookup((srcPt.fY - src_y));
for (int src_x = x0; src_x <= x1 ; src_x++) {
SkFixed xweight = s.getBitmapFilter()->lookup((srcPt.fX - src_x));
SkFixed combined_weight = SkFixedMul(xweight, yweight);
SkPMColor c = *s.fBitmap->getAddr32(src_x, src_y);
fr += combined_weight * SkGetPackedR32(c);
fg += combined_weight * SkGetPackedG32(c);
fb += combined_weight * SkGetPackedB32(c);
fa += combined_weight * SkGetPackedA32(c);
weight += combined_weight;
}
}
fr = SkFixedDiv(fr, weight);
fg = SkFixedDiv(fg, weight);
fb = SkFixedDiv(fb, weight);
fa = SkFixedDiv(fa, weight);
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
*colors++ = SkPackARGB32(a, r, g, b);
x++;
}
}
void highQualityFilter_ScaleOnly(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 = SkClampMax(int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)), maxY);
int y1 = SkClampMax(int(floor(sy+s.getBitmapFilter()->width() + 0.5f)), maxY);
while (count-- > 0) {
s.fInvProc(*s.fInvMatrix, SkIntToScalar(x),
SkIntToScalar(y), &srcPt);
srcPt.fX -= SK_ScalarHalf;
srcPt.fY -= SK_ScalarHalf;
int sx = SkScalarFloorToInt(srcPt.fX);
SkFixed weight = 0;
SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
int x0 = SkClampMax(int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)), maxX);
int x1 = SkClampMax(int(floor(sx+s.getBitmapFilter()->width() + 0.5f)), maxX);
for (int src_y = y0; src_y <= y1; src_y++) {
SkFixed yweight = s.getBitmapFilter()->lookup((srcPt.fY - src_y));
for (int src_x = x0; src_x <= x1 ; src_x++) {
SkFixed xweight = s.getBitmapFilter()->lookup((srcPt.fX - src_x));
SkFixed combined_weight = SkFixedMul(xweight, yweight);
SkPMColor c = *s.fBitmap->getAddr32(src_x, src_y);
fr += combined_weight * SkGetPackedR32(c);
fg += combined_weight * SkGetPackedG32(c);
fb += combined_weight * SkGetPackedB32(c);
fa += combined_weight * SkGetPackedA32(c);
weight += combined_weight;
}
}
fr = SkFixedDiv(fr, weight);
fg = SkFixedDiv(fg, weight);
fb = SkFixedDiv(fb, weight);
fa = SkFixedDiv(fa, weight);
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
*colors++ = SkPackARGB32(a, r, g, b);
x++;
}
}
SK_CONF_DECLARE(const char *, c_bitmapFilter, "bitmap.filter", "mitchell", "Which bitmap filter to use [mitchell, sinc, gaussian, triangle, box]");
static SkBitmapFilter *allocateBitmapFilter() {
if (!strcmp(c_bitmapFilter, "mitchell")) {
return SkNEW_ARGS(SkMitchellFilter,(1.f/3.f,1.f/3.f));
} else if (!strcmp(c_bitmapFilter, "sinc")) {
return SkNEW_ARGS(SkSincFilter,(3));
} else if (!strcmp(c_bitmapFilter, "gaussian")) {
return SkNEW_ARGS(SkGaussianFilter,(2));
} else if (!strcmp(c_bitmapFilter, "triangle")) {
return SkNEW(SkTriangleFilter);
} else if (!strcmp(c_bitmapFilter, "box")) {
return SkNEW(SkBoxFilter);
} else {
SkASSERT(!!!"Unknown filter type");
}
return NULL;
}
SkBitmapProcState::ShaderProc32
SkBitmapProcState::chooseBitmapFilterProc(const SkPaint& paint) {
// we need to be requested
uint32_t mask = SkPaint::kFilterBitmap_Flag
| SkPaint::kHighQualityFilterBitmap_Flag
;
if ((paint.getFlags() & mask) != mask) {
return NULL;
}
// TODO: consider supporting other configs (e.g. 565, A8)
if (fBitmap->config() != SkBitmap::kARGB_8888_Config) {
return NULL;
}
// TODO: consider supporting repeat and mirror
if (SkShader::kClamp_TileMode != fTileModeX || SkShader::kClamp_TileMode != fTileModeY) {
return NULL;
}
// TODO: support blending inside our procs
if (0xFF != paint.getAlpha()) {
return NULL;
}
if (fInvType & (SkMatrix::kAffine_Mask | SkMatrix::kScale_Mask)) {
fBitmapFilter = allocateBitmapFilter();
}
if (fInvType & SkMatrix::kAffine_Mask) {
return highQualityFilter;
} else if (fInvType & SkMatrix::kScale_Mask) {
return highQualityFilter_ScaleOnly;
} else {
return NULL;
}
}
static void divideByWeights(SkFixed *sums, SkFixed *weights, SkBitmap *dst) {
for (int y = 0 ; y < dst->height() ; y++) {
for (int x = 0 ; x < dst->width() ; x++) {
SkFixed fr = SkFixedDiv(sums[4*(y*dst->width() + x) + 0], weights[y*dst->width() + x]);
SkFixed fg = SkFixedDiv(sums[4*(y*dst->width() + x) + 1], weights[y*dst->width() + x]);
SkFixed fb = SkFixedDiv(sums[4*(y*dst->width() + x) + 2], weights[y*dst->width() + x]);
SkFixed fa = SkFixedDiv(sums[4*(y*dst->width() + x) + 3], weights[y*dst->width() + x]);
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
*dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
}
}
}
static void upScaleHoriz(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
for (int y = 0 ; y < src->height() ; y++) {
for (int x = 0 ; x < dst->width() ; x++) {
float sx = x / scale - 0.5f;
int x0 = SkClampMax(int(ceil(sx-filter->width() + 0.5f)), src->width()-1);
int x1 = SkClampMax(int(floor(sx+filter->width() + 0.5f)), src->width()-1);
SkFixed total_weight = 0;
SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
for (int src_x = x0 ; src_x <= x1 ; src_x++) {
SkFixed weight = filter->lookup(sx - src_x);
SkPMColor c = *src->getAddr32(src_x,y);
fr += weight * SkGetPackedR32(c);
fg += weight * SkGetPackedG32(c);
fb += weight * SkGetPackedB32(c);
fa += weight * SkGetPackedA32(c);
total_weight += weight;
}
fr = SkFixedDiv(fr, total_weight);
fg = SkFixedDiv(fg, total_weight);
fb = SkFixedDiv(fb, total_weight);
fa = SkFixedDiv(fa, total_weight);
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
*dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
}
}
}
static void downScaleHoriz(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
SkFixed *sums = SkNEW_ARRAY(SkFixed, dst->width() * dst->height() * 4);
SkFixed *weights = SkNEW_ARRAY(SkFixed, dst->width() * dst->height());
SkAutoTDeleteArray<SkFixed> ada1(sums);
SkAutoTDeleteArray<SkFixed> ada2(weights);
memset(sums, 0, dst->width() * dst->height() * sizeof(SkFixed) * 4);
memset(weights, 0, dst->width() * dst->height() * sizeof(SkFixed));
for (int y = 0 ; y < src->height() ; y++) {
for (int x = 0 ; x < src->width() ; x++) {
// splat each source pixel into the destination image
float dx = (x + 0.5f) * scale;
int x0 = SkClampMax(int(ceil(dx-filter->width() + 0.5f)), dst->width()-1);
int x1 = SkClampMax(int(floor(dx+filter->width() + 0.5f)), dst->width()-1);
SkPMColor c = *src->getAddr32(x,y);
for (int dst_x = x0 ; dst_x <= x1 ; dst_x++) {
SkFixed weight = filter->lookup(dx - dst_x);
sums[4*(y*dst->width() + dst_x) + 0] += weight*SkGetPackedR32(c);
sums[4*(y*dst->width() + dst_x) + 1] += weight*SkGetPackedG32(c);
sums[4*(y*dst->width() + dst_x) + 2] += weight*SkGetPackedB32(c);
sums[4*(y*dst->width() + dst_x) + 3] += weight*SkGetPackedA32(c);
weights[y*dst->width() + dst_x] += weight;
}
}
}
divideByWeights(sums, weights, dst);
}
static void upScaleVert(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
for (int y = 0 ; y < dst->height() ; y++) {
for (int x = 0 ; x < dst->width() ; x++) {
float sy = y / scale - 0.5f;
int y0 = SkClampMax(int(ceil(sy-filter->width() + 0.5f)), src->height()-1);
int y1 = SkClampMax(int(floor(sy+filter->width() + 0.5f)), src->height()-1);
SkFixed total_weight = 0;
SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
for (int src_y = y0 ; src_y <= y1 ; src_y++) {
SkFixed weight = filter->lookup(sy - src_y);
SkPMColor c = *src->getAddr32(x,src_y);
fr += weight * SkGetPackedR32(c);
fg += weight * SkGetPackedG32(c);
fb += weight * SkGetPackedB32(c);
fa += weight * SkGetPackedA32(c);
total_weight += weight;
}
fr = SkFixedDiv(fr, total_weight);
fg = SkFixedDiv(fg, total_weight);
fb = SkFixedDiv(fb, total_weight);
fa = SkFixedDiv(fa, total_weight);
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
*dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
}
}
}
static void downScaleVert(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
SkFixed *sums = SkNEW_ARRAY(SkFixed, dst->width() * dst->height() * 4);
SkFixed *weights = SkNEW_ARRAY(SkFixed, dst->width() * dst->height());
SkAutoTDeleteArray<SkFixed> ada1(sums);
SkAutoTDeleteArray<SkFixed> ada2(weights);
memset(sums, 0, dst->width() * dst->height() * sizeof(SkFixed) * 4);
memset(weights, 0, dst->width() * dst->height() * sizeof(SkFixed));
for (int y = 0 ; y < src->height() ; y++) {
for (int x = 0 ; x < src->width() ; x++) {
// splat each source pixel into the destination image
float dy = (y + 0.5f) * scale;
int y0 = SkClampMax(int(ceil(dy-filter->width() + 0.5f)), dst->height()-1);
int y1 = SkClampMax(int(floor(dy+filter->width() + 0.5f)), dst->height()-1);
SkPMColor c = *src->getAddr32(x,y);
for (int dst_y = y0 ; dst_y <= y1 ; dst_y++) {
SkFixed weight = filter->lookup(dy - dst_y);
sums[4*(dst_y*dst->width() + x) + 0] += weight*SkGetPackedR32(c);
sums[4*(dst_y*dst->width() + x) + 1] += weight*SkGetPackedG32(c);
sums[4*(dst_y*dst->width() + x) + 2] += weight*SkGetPackedB32(c);
sums[4*(dst_y*dst->width() + x) + 3] += weight*SkGetPackedA32(c);
weights[dst_y*dst->width() + x] += weight;
}
}
}
divideByWeights(sums, weights, dst);
}
void SkBitmap::scale(SkBitmap *dst) const {
SkBitmap horiz_temp;
horiz_temp.setConfig(SkBitmap::kARGB_8888_Config, dst->width(), height());
horiz_temp.allocPixels();
SkBitmapFilter *filter = allocateBitmapFilter();
float horiz_scale = float(dst->width()) / width();
if (horiz_scale == 1) {
this->copyPixelsTo(horiz_temp.getPixels(), getSize());
} else if (horiz_scale > 1) {
upScaleHoriz(this, &horiz_temp, horiz_scale, filter);
} else if (horiz_scale < 1) {
downScaleHoriz(this, &horiz_temp, horiz_scale, filter);
}
float vert_scale = float(dst->height()) / height();
if (vert_scale == 1) {
horiz_temp.copyPixelsTo(dst->getPixels(), dst->getSize());
} else if (vert_scale > 1) {
upScaleVert(&horiz_temp, dst, vert_scale, filter);
} else if (vert_scale < 1) {
downScaleVert(&horiz_temp, dst, vert_scale, filter);
}
SkDELETE(filter);
}

150
src/core/SkBitmapFilter.h Normal file
View File

@ -0,0 +1,150 @@
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapFilter_DEFINED
#define SkBitmapFilter_DEFINED
#include "SkMath.h"
// size of the precomputed bitmap filter tables for high quality filtering.
// Used to precompute the shape of the filter kernel.
// Table size chosen from experiments to see where I could start to see a difference.
#define SKBITMAP_FILTER_TABLE_SIZE 32
class SkBitmapFilter {
public:
SkBitmapFilter(float width)
: fWidth(width), fInvWidth(1.f/width) {
precomputed = false;
}
SkFixed lookup( float x ) const {
if (!precomputed) {
precomputeTable();
}
int filter_idx = int(fabsf(x * invWidth() * SKBITMAP_FILTER_TABLE_SIZE));
return fFilterTable[ SkTMin(filter_idx, SKBITMAP_FILTER_TABLE_SIZE-1) ];
}
float lookupFloat( float x ) const {
if (!precomputed) {
precomputeTable();
}
int filter_idx = int(fabsf(x * invWidth() * SKBITMAP_FILTER_TABLE_SIZE));
return fFilterTableFloat[ SkTMin(filter_idx, SKBITMAP_FILTER_TABLE_SIZE-1) ];
}
float width() const { return fWidth; }
float invWidth() const { return fInvWidth; }
virtual float evaluate(float x) const = 0;
virtual ~SkBitmapFilter() {}
protected:
float fWidth;
float fInvWidth;
mutable bool precomputed;
mutable SkFixed fFilterTable[SKBITMAP_FILTER_TABLE_SIZE];
mutable float fFilterTableFloat[SKBITMAP_FILTER_TABLE_SIZE];
private:
void precomputeTable() const {
precomputed = true;
SkFixed *ftp = fFilterTable;
float *ftp_float = fFilterTableFloat;
for (int x = 0; x < SKBITMAP_FILTER_TABLE_SIZE; ++x) {
float fx = ((float)x + .5f) * this->width() / SKBITMAP_FILTER_TABLE_SIZE;
float filter_value = evaluate(fx);
*ftp_float++ = filter_value;
*ftp++ = SkFloatToFixed(filter_value);
}
}
};
class SkMitchellFilter: public SkBitmapFilter {
public:
SkMitchellFilter(float b, float c, float width=2.0f)
: SkBitmapFilter(width), B(b), C(c) {
}
virtual float evaluate(float x) const SK_OVERRIDE {
x = fabsf(x);
if (x > 2.f) {
return 0;
} else if (x > 1.f) {
return ((-B - 6*C) * x*x*x + (6*B + 30*C) * x*x +
(-12*B - 48*C) * x + (8*B + 24*C)) * (1.f/6.f);
} else {
return ((12 - 9*B - 6*C) * x*x*x +
(-18 + 12*B + 6*C) * x*x +
(6 - 2*B)) * (1.f/6.f);
}
}
protected:
float B, C;
};
class SkGaussianFilter: public SkBitmapFilter {
public:
SkGaussianFilter(float a, float width=2.0f)
: SkBitmapFilter(width), alpha(a), expWidth(expf(-alpha * width * width)) {
}
virtual float evaluate(float x) const SK_OVERRIDE {
return SkTMax(0.f, float(expf(-alpha*x*x) - expWidth));
}
protected:
float alpha, expWidth;
};
class SkTriangleFilter: public SkBitmapFilter {
public:
SkTriangleFilter(float width=1)
: SkBitmapFilter(width) {
}
virtual float evaluate(float x) const SK_OVERRIDE {
return SkTMax(0.f, fWidth - fabsf(x));
}
protected:
};
class SkBoxFilter: public SkBitmapFilter {
public:
SkBoxFilter(float width=0.5f)
: SkBitmapFilter(width) {
}
virtual float evaluate(float x) const SK_OVERRIDE {
return 1;
}
protected:
};
class SkSincFilter: public SkBitmapFilter {
public:
SkSincFilter(float t, float width=3.f)
: SkBitmapFilter(width), tau(t) {
}
virtual float evaluate(float x) const SK_OVERRIDE {
x = sk_float_abs(x * fInvWidth);
if (x < 1e-5f) return 1.f;
if (x > 1.f) return 0.f;
x *= (float) M_PI;
float sinc = sk_float_sin(x) / x;
float lanczos = sk_float_sin(x * tau) / (x * tau);
return sinc * lanczos;
}
protected:
float tau;
};
#endif

187
src/core/SkBitmapProcBicubic.cpp
View File

@ -1,187 +0,0 @@
/*
* 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 "SkRTConf.h"
#include "SkShader.h"
#define DS(x) SkDoubleToScalar(x)
#define MUL(a, b) ((a) * (b))
static inline SkPMColor cubicBlend(const SkFixed cc[4], SkPMColor c0, SkPMColor c1, SkPMColor c2, SkPMColor c3) {
SkFixed fa = MUL(cc[0], SkGetPackedA32(c0)) + MUL(cc[1], SkGetPackedA32(c1)) + MUL(cc[2], SkGetPackedA32(c2)) + MUL(cc[3], SkGetPackedA32(c3));
SkFixed fr = MUL(cc[0], SkGetPackedR32(c0)) + MUL(cc[1], SkGetPackedR32(c1)) + MUL(cc[2], SkGetPackedR32(c2)) + MUL(cc[3], SkGetPackedR32(c3));
SkFixed fg = MUL(cc[0], SkGetPackedG32(c0)) + MUL(cc[1], SkGetPackedG32(c1)) + MUL(cc[2], SkGetPackedG32(c2)) + MUL(cc[3], SkGetPackedG32(c3));
SkFixed fb = MUL(cc[0], SkGetPackedB32(c0)) + MUL(cc[1], SkGetPackedB32(c1)) + MUL(cc[2], SkGetPackedB32(c2)) + MUL(cc[3], SkGetPackedB32(c3));
int a = SkClampMax(SkFixedRoundToInt(fa), 255);
int r = SkClampMax(SkFixedRoundToInt(fr), a);
int g = SkClampMax(SkFixedRoundToInt(fg), a);
int b = SkClampMax(SkFixedRoundToInt(fb), a);
return SkPackARGB32(a, r, g, b);
}
static float poly_eval(const float cc[4], float t) {
return cc[0] + t * (cc[1] + t * (cc[2] + t * cc[3]));
}
static void build_coeff4(SkFixed dst[4], float t) {
static const SkScalar coefficients[16] = {
DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0),
DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0),
DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0),
DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0),
};
dst[0] = SkFloatToFixed(poly_eval(&coefficients[ 0], t));
dst[1] = SkFloatToFixed(poly_eval(&coefficients[ 4], t));
dst[2] = SkFloatToFixed(poly_eval(&coefficients[ 8], t));
dst[3] = SkFloatToFixed(poly_eval(&coefficients[12], t));
}
static SkPMColor doBicubicFilter(const SkBitmap *bm, SkFixed coeffX[4], SkFixed coeffY[4],
int x0, int x1, int x2, int x3,
int y0, int y1, int y2, int y3 )
{
SkPMColor s00 = *bm->getAddr32(x0, y0);
SkPMColor s10 = *bm->getAddr32(x1, y0);
SkPMColor s20 = *bm->getAddr32(x2, y0);
SkPMColor s30 = *bm->getAddr32(x3, y0);
SkPMColor s0 = cubicBlend(coeffX, s00, s10, s20, s30);
SkPMColor s01 = *bm->getAddr32(x0, y1);
SkPMColor s11 = *bm->getAddr32(x1, y1);
SkPMColor s21 = *bm->getAddr32(x2, y1);
SkPMColor s31 = *bm->getAddr32(x3, y1);
SkPMColor s1 = cubicBlend(coeffX, s01, s11, s21, s31);
SkPMColor s02 = *bm->getAddr32(x0, y2);
SkPMColor s12 = *bm->getAddr32(x1, y2);
SkPMColor s22 = *bm->getAddr32(x2, y2);
SkPMColor s32 = *bm->getAddr32(x3, y2);
SkPMColor s2 = cubicBlend(coeffX, s02, s12, s22, s32);
SkPMColor s03 = *bm->getAddr32(x0, y3);
SkPMColor s13 = *bm->getAddr32(x1, y3);
SkPMColor s23 = *bm->getAddr32(x2, y3);
SkPMColor s33 = *bm->getAddr32(x3, y3);
SkPMColor s3 = cubicBlend(coeffX, s03, s13, s23, s33);
return cubicBlend(coeffY, s0, s1, s2, s3);
}
static void bicubicFilter(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;
SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
SkFixed coeffX[4], coeffY[4];
build_coeff4(coeffX, fractx);
build_coeff4(coeffY, fracty);
int sx = SkScalarFloorToInt(srcPt.fX);
int sy = SkScalarFloorToInt(srcPt.fY);
// Here is where we can support other tile modes (e.g. repeat or mirror)
int x0 = SkClampMax(sx - 1, maxX);
int x1 = SkClampMax(sx , maxX);
int x2 = SkClampMax(sx + 1, maxX);
int x3 = SkClampMax(sx + 2, maxX);
int y0 = SkClampMax(sy - 1, maxY);
int y1 = SkClampMax(sy , maxY);
int y2 = SkClampMax(sy + 1, maxY);
int y3 = SkClampMax(sy + 2, maxY);
*colors++ = doBicubicFilter( s.fBitmap, coeffX, coeffY, x0, x1, x2, x3, y0, y1, y2, y3 );
x++;
}
}
static void bicubicFilter_ScaleOnly(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;
SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
SkFixed coeffX[4], coeffY[4];
build_coeff4(coeffY, fracty);
int sy = SkScalarFloorToInt(srcPt.fY);
int y0 = SkClampMax(sy - 1, maxY);
int y1 = SkClampMax(sy , maxY);
int y2 = SkClampMax(sy + 1, maxY);
int y3 = SkClampMax(sy + 2, maxY);
while (count-- > 0) {
s.fInvProc(*s.fInvMatrix, SkIntToScalar(x), SkIntToScalar(y), &srcPt);
srcPt.fX -= SK_ScalarHalf;
SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
build_coeff4(coeffX, fractx);
int sx = SkScalarFloorToInt(srcPt.fX);
// Here is where we can support other tile modes (e.g. repeat or mirror)
int x0 = SkClampMax(sx - 1, maxX);
int x1 = SkClampMax(sx , maxX);
int x2 = SkClampMax(sx + 1, maxX);
int x3 = SkClampMax(sx + 2, maxX);
*colors++ = doBicubicFilter( s.fBitmap, coeffX, coeffY, x0, x1, x2, x3, y0, y1, y2, y3 );
x++;
}
}
SkBitmapProcState::ShaderProc32
SkBitmapProcState::chooseBicubicFilterProc(const SkPaint& paint) {
// we need to be requested
uint32_t mask = SkPaint::kFilterBitmap_Flag
| SkPaint::kBicubicFilterBitmap_Flag
;
if ((paint.getFlags() & mask) != mask) {
return NULL;
}
// TODO: consider supporting other configs (e.g. 565, A8)
if (fBitmap->config() != SkBitmap::kARGB_8888_Config) {
return NULL;
}
// TODO: consider supporting repeat and mirror
if (SkShader::kClamp_TileMode != fTileModeX || SkShader::kClamp_TileMode != fTileModeY) {
return NULL;
}
// TODO: support blending inside our procs
if (0xFF != paint.getAlpha()) {
return NULL;
}
if (fInvType & SkMatrix::kAffine_Mask) {
return bicubicFilter;
} else if (fInvType & SkMatrix::kScale_Mask) {
return bicubicFilter_ScaleOnly;
} else {
return NULL;
}
}

8
src/core/SkBitmapProcState.cpp
View File

@ -302,13 +302,13 @@ bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
fShaderProc32 = this->chooseShaderProc32();
}
if (NULL == fShaderProc32) {
fShaderProc32 = this->chooseBitmapFilterProc(paint);
}
// see if our platform has any accelerated overrides
this->platformProcs();
if (NULL == fShaderProc32) {
fShaderProc32 = this->chooseBicubicFilterProc(paint);
}
return true;
}

18
src/core/SkBitmapProcState.h
View File

@ -11,6 +11,7 @@
#define SkBitmapProcState_DEFINED
#include "SkBitmap.h"
#include "SkBitmapFilter.h"
#include "SkMatrix.h"
#define FractionalInt_IS_64BIT
@ -113,6 +114,8 @@ struct SkBitmapProcState {
// are ignored
ShaderProc32 getShaderProc32() const { return fShaderProc32; }
ShaderProc16 getShaderProc16() const { return fShaderProc16; }
SkBitmapFilter* getBitmapFilter() const { return fBitmapFilter; }
#ifdef SK_DEBUG
MatrixProc getMatrixProc() const;
@ -139,12 +142,11 @@ private:
MatrixProc chooseMatrixProc(bool trivial_matrix);
bool chooseProcs(const SkMatrix& inv, const SkPaint&);
ShaderProc32 chooseShaderProc32();
void buildFilterCoefficients(SkFixed dst[4], float t) const;
SkBitmapFilter *fBitmapFilter;
/** test method for choosing a bicubic shading filter
*/
ShaderProc32 chooseBicubicFilterProc(const SkPaint &paint);
ShaderProc32 chooseBitmapFilterProc(const SkPaint &paint);
// Return false if we failed to setup for fast translate (e.g. overflow)
bool setupForTranslate();
@ -200,4 +202,10 @@ void ClampX_ClampY_nofilter_affine(const SkBitmapProcState& s,
void S32_D16_filter_DX(const SkBitmapProcState& s,
const uint32_t* xy, int count, uint16_t* colors);
void highQualityFilter_ScaleOnly(const SkBitmapProcState &s, int x, int y,
SkPMColor *SK_RESTRICT colors, int count);
void highQualityFilter(const SkBitmapProcState &s, int x, int y,
SkPMColor *SK_RESTRICT colors, int count);
#endif

182
src/opts/SkBitmapFilter_opts_SSE2.cpp Normal file
View File

@ -0,0 +1,182 @@
/*
* 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 = s.getBitmapFilter()->lookupFloat( (srcPt.fY - src_y) );
for (int src_x = x0; src_x <= x1 ; src_x++) {
float xweight = s.getBitmapFilter()->lookupFloat( (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 = s.getBitmapFilter()->lookupFloat( (srcPt.fY - src_y) );
for (int src_x = x0; src_x <= x1 ; src_x++) {
float xweight = s.getBitmapFilter()->lookupFloat( (srcPt.fX - src_x) );
float combined_weight = xweight * yweight;
SkPMColor color = *s.fBitmap->getAddr32(src_x, src_y);
__m128 c = _mm_set_ps(SkGetPackedB32(color),
SkGetPackedG32(color),
SkGetPackedR32(color),
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);
}
}

20
src/opts/SkBitmapFilter_opts_SSE2.h Normal file
View File

@ -0,0 +1,20 @@
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapFilter_opts_sse2_DEFINED
#define SkBitmapFilter_opts_sse2_DEFINED
#include "SkBitmapProcState.h"
void highQualityFilter_ScaleOnly_SSE2(const SkBitmapProcState &s, int x, int y,
SkPMColor *SK_RESTRICT colors, int count);
void highQualityFilter_SSE2(const SkBitmapProcState &s, int x, int y,
SkPMColor *SK_RESTRICT colors, int count);
#endif

13
src/opts/opts_check_SSE2.cpp
View File

@ -7,6 +7,7 @@
#include "SkBitmapProcState_opts_SSE2.h"
#include "SkBitmapProcState_opts_SSSE3.h"
#include "SkBitmapFilter_opts_SSE2.h"
#include "SkBlitMask.h"
#include "SkBlitRow.h"
#include "SkBlitRect_opts_SSE2.h"
@ -14,6 +15,8 @@
#include "SkUtils_opts_SSE2.h"
#include "SkUtils.h"
#include "SkRTConf.h"
#if defined(_MSC_VER) && defined(_WIN64)
#include <intrin.h>
#endif
@ -102,6 +105,8 @@ static bool cachedHasSSSE3() {
return gHasSSSE3;
}
SK_CONF_DECLARE( bool, c_hqfilter_sse, "bitmap.filter.highQualitySSE", false, "Use SSE optimized version of high quality image filters");
void SkBitmapProcState::platformProcs() {
if (cachedHasSSSE3()) {
#if !defined(SK_BUILD_FOR_ANDROID)
@ -142,6 +147,14 @@ void SkBitmapProcState::platformProcs() {
} else if (fMatrixProc == ClampX_ClampY_nofilter_affine) {
fMatrixProc = ClampX_ClampY_nofilter_affine_SSE2;
}
if (c_hqfilter_sse) {
if (fShaderProc32 == highQualityFilter) {
fShaderProc32 = highQualityFilter_SSE2;
}
if (fShaderProc32 == highQualityFilter_ScaleOnly) {
fShaderProc32 = highQualityFilter_ScaleOnly_SSE2;
}
}
}
}