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skia2/samplecode/SampleFilterFuzz.cpp
skia.committer@gmail.com f91e3d4f54 Sanitizing source files in Housekeeper-Nightly 
git-svn-id: http://skia.googlecode.com/svn/trunk@11411 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-09-20 07:01:33 +00:00

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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 "SampleCode.h"
#include "SkBicubicImageFilter.h"
#include "SkBitmapSource.h"
#include "SkBlurImageFilter.h"
#include "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkComposeImageFilter.h"
#include "SkBitmapDevice.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkFlattenableSerialization.h"
#include "SkLightingImageFilter.h"
#include "SkMagnifierImageFilter.h"
#include "SkMergeImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPerlinNoiseShader.h"
#include "SkRandom.h"
#include "SkRectShaderImageFilter.h"
#include "SkView.h"
#include "SkXfermodeImageFilter.h"
static const uint32_t kSeed = 1;
static SkRandom gRand(kSeed);
static bool return_large = false;
static bool return_undef = false;
static const int kBitmapSize = 24;
static int R(float x) {
return (int)floor(SkScalarToFloat(gRand.nextUScalar1()) * x);
}
#if defined _WIN32
#pragma warning ( push )
// we are intentionally causing an overflow here
// (warning C4756: overflow in constant arithmetic)
#pragma warning ( disable : 4756 )
#endif
static float huge() {
double d = 1e100;
float f = (float)d;
return f;
}
#if defined _WIN32
#pragma warning ( pop )
#endif
static float make_number(bool positiveOnly) {
float f = positiveOnly ? 1.0f : 0.0f;
float v = f;
int sel;
if (return_large) sel = R(6); else sel = R(4);
if (!return_undef && sel == 0) sel = 1;
if (R(2) == 1) v = (float)(R(100)+f); else
switch (sel) {
case 0: break;
case 1: v = f; break;
case 2: v = 0.000001f; break;
case 3: v = 10000.0f; break;
case 4: v = 2000000000.0f; break;
case 5: v = huge(); break;
}
if (!positiveOnly && (R(4) == 1)) v = -v;
return v;
}
static SkScalar make_scalar(bool positiveOnly = false) {
return SkFloatToScalar(make_number(positiveOnly));
}
static SkRect make_rect(int offset = 1) {
return SkRect::MakeWH(SkIntToScalar(R(static_cast<float>(kBitmapSize))+offset),
SkIntToScalar(R(static_cast<float>(kBitmapSize))+offset));
}
static SkXfermode::Mode make_xfermode() {
return static_cast<SkXfermode::Mode>(R(SkXfermode::kLastMode+1));
}
static SkColor make_color() {
return (R(2) == 1) ? 0xFFC0F0A0 : 0xFF000090;
}
static SkPoint3 make_point() {
return SkPoint3(make_scalar(), make_scalar(), make_scalar(true));
}
static SkDisplacementMapEffect::ChannelSelectorType make_channel_selector_type() {
return static_cast<SkDisplacementMapEffect::ChannelSelectorType>(R(4)+1);
}
static void make_g_bitmap(SkBitmap& bitmap) {
bitmap.setConfig(SkBitmap::kARGB_8888_Config, kBitmapSize, kBitmapSize);
bitmap.allocPixels();
SkBitmapDevice device(bitmap);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xFF884422);
paint.setTextSize(SkIntToScalar(kBitmapSize/2));
const char* str = "g";
canvas.drawText(str, strlen(str), SkIntToScalar(kBitmapSize/8),
SkIntToScalar(kBitmapSize/4), paint);
}
static void make_checkerboard_bitmap(SkBitmap& bitmap) {
bitmap.setConfig(SkBitmap::kARGB_8888_Config, kBitmapSize, kBitmapSize);
bitmap.allocPixels();
SkBitmapDevice device(bitmap);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint darkPaint;
darkPaint.setColor(0xFF804020);
SkPaint lightPaint;
lightPaint.setColor(0xFF244484);
const int i = kBitmapSize / 8;
const SkScalar f = SkIntToScalar(i);
for (int y = 0; y < kBitmapSize; y += i) {
for (int x = 0; x < kBitmapSize; x += i) {
canvas.save();
canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
canvas.drawRect(SkRect::MakeXYWH(0, 0, f, f), darkPaint);
canvas.drawRect(SkRect::MakeXYWH(f, 0, f, f), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(0, f, f, f), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(f, f, f, f), darkPaint);
canvas.restore();
}
}
}
static const SkBitmap& make_bitmap() {
static SkBitmap bitmap[2];
static bool initialized = false;
if (!initialized) {
make_g_bitmap(bitmap[0]);
make_checkerboard_bitmap(bitmap[1]);
initialized = true;
}
return bitmap[R(2)];
}
static SkImageFilter* make_image_filter(bool canBeNull = true) {
SkImageFilter* filter = 0;
// Add a 1 in 3 chance to get a NULL input
if (canBeNull && (R(3) == 1)) { return filter; }
enum { BICUBIC, MERGE, COLOR, BLUR, MAGNIFIER, XFERMODE, OFFSET, COMPOSE,
DISTANT_LIGHT, POINT_LIGHT, SPOT_LIGHT, NOISE, DROP_SHADOW,
MORPHOLOGY, BITMAP, DISPLACE, NUM_FILTERS };
switch (R(NUM_FILTERS)) {
case BICUBIC:
// Scale is set to 1 here so that it can fit in the DAG without resizing the output
filter = SkBicubicImageFilter::CreateMitchell(SkSize::Make(1, 1), make_image_filter());
break;
case MERGE:
filter = new SkMergeImageFilter(make_image_filter(), make_image_filter(), make_xfermode());
break;
case COLOR:
{
SkAutoTUnref<SkColorFilter> cf((R(2) == 1) ?
SkColorFilter::CreateModeFilter(make_color(), make_xfermode()) :
SkColorFilter::CreateLightingFilter(make_color(), make_color()));
filter = cf.get() ? SkColorFilterImageFilter::Create(cf, make_image_filter()) : 0;
}
break;
case BLUR:
filter = new SkBlurImageFilter(make_scalar(true), make_scalar(true), make_image_filter());
break;
case MAGNIFIER:
filter = new SkMagnifierImageFilter(make_rect(0), make_scalar(true));
break;
case XFERMODE:
{
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(make_xfermode()));
filter = new SkXfermodeImageFilter(mode, make_image_filter(), make_image_filter());
}
break;
case OFFSET:
filter = new SkOffsetImageFilter(make_scalar(), make_scalar(), make_image_filter());
break;
case COMPOSE:
filter = new SkComposeImageFilter(make_image_filter(), make_image_filter());
break;
case DISTANT_LIGHT:
filter = (R(2) == 1) ?
SkLightingImageFilter::CreateDistantLitDiffuse(make_point(),
make_color(), make_scalar(), make_scalar(), make_image_filter()) :
SkLightingImageFilter::CreateDistantLitSpecular(make_point(),
make_color(), make_scalar(), make_scalar(), SkIntToScalar(R(10)),
make_image_filter());
break;
case POINT_LIGHT:
filter = (R(2) == 1) ?
SkLightingImageFilter::CreatePointLitDiffuse(make_point(),
make_color(), make_scalar(), make_scalar(), make_image_filter()) :
SkLightingImageFilter::CreatePointLitSpecular(make_point(),
make_color(), make_scalar(), make_scalar(), SkIntToScalar(R(10)),
make_image_filter());
break;
case SPOT_LIGHT:
filter = (R(2) == 1) ?
SkLightingImageFilter::CreateSpotLitDiffuse(SkPoint3(0, 0, 0),
make_point(), make_scalar(), make_scalar(), make_color(),
make_scalar(), make_scalar(), make_image_filter()) :
SkLightingImageFilter::CreateSpotLitSpecular(SkPoint3(0, 0, 0),
make_point(), make_scalar(), make_scalar(), make_color(),
make_scalar(), make_scalar(), SkIntToScalar(R(10)), make_image_filter());
break;
case NOISE:
{
SkAutoTUnref<SkShader> shader((R(2) == 1) ?
SkPerlinNoiseShader::CreateFractalNoise(
make_scalar(true), make_scalar(true), R(10.0f), make_scalar()) :
SkPerlinNoiseShader::CreateTubulence(
make_scalar(true), make_scalar(true), R(10.0f), make_scalar()));
filter = SkRectShaderImageFilter::Create(shader,
SkRect::MakeWH(SkIntToScalar(kBitmapSize),
SkIntToScalar(kBitmapSize)));
}
break;
case DROP_SHADOW:
filter = new SkDropShadowImageFilter(make_scalar(), make_scalar(),
make_scalar(true), make_color(), make_image_filter());
break;
case MORPHOLOGY:
if (R(2) == 1)
filter = new SkDilateImageFilter(R(static_cast<float>(kBitmapSize)),
R(static_cast<float>(kBitmapSize)), make_image_filter());
else
filter = new SkErodeImageFilter(R(static_cast<float>(kBitmapSize)),
R(static_cast<float>(kBitmapSize)), make_image_filter());
break;
case BITMAP:
filter = new SkBitmapSource(make_bitmap());
break;
case DISPLACE:
filter = new SkDisplacementMapEffect(make_channel_selector_type(),
make_channel_selector_type(), make_scalar(),
make_image_filter(false), make_image_filter());
break;
default:
break;
}
return (filter || canBeNull) ? filter : make_image_filter(canBeNull);
}
static void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
canvas->save();
canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
SkIntToScalar(kBitmapSize), SkIntToScalar(kBitmapSize)));
canvas->drawBitmap(make_bitmap(), SkIntToScalar(x), SkIntToScalar(y), &paint);
canvas->restore();
}
static void do_fuzz(SkCanvas* canvas) {
SkPaint paint;
paint.setImageFilter(make_image_filter());
drawClippedBitmap(canvas, 0, 0, paint);
}
//////////////////////////////////////////////////////////////////////////////
class ImageFilterFuzzView : public SampleView {
public:
ImageFilterFuzzView() {
this->setBGColor(0xFFDDDDDD);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "ImageFilterFuzzer");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
}
virtual void onDrawContent(SkCanvas* canvas) {
do_fuzz(canvas);
this->inval(0);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new ImageFilterFuzzView; }
static SkViewRegister reg(MyFactory);
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