fuzz/FuzzDrawFunctions.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2016 Mozilla Foundation
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "Fuzz.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkImage.h"
 #include "SkLayerRasterizer.h"
 #include "SkPath.h"
 #include "SkSurface.h"
 #include "SkTypeface.h"
 #include "SkClipOpPriv.h"

 static const int kBmpSize = 24;
 static const int kMaxX = 250;
 static const int kMaxY = 250;
 static const int kPtsLen = 10;
 static const int kTxtLen = 5;

 static void init_string(Fuzz* fuzz, char* str, size_t bufSize) {
     for (size_t i = 0; i < bufSize-1; ++i) {
         fuzz->nextRange(&str[i], 0x20, 0x7E); // printable ASCII
     }
     str[bufSize-1] = '\0';
 }

 // make_paint mostly borrowed from FilterFuzz.cpp
 static void init_paint(Fuzz* fuzz, SkPaint* p) {
     bool b;
     fuzz->next(&b);
     p->setAntiAlias(b);

     uint8_t tmp_u8;
     fuzz->nextRange(&tmp_u8, 0, (int)SkBlendMode::kLastMode);
     p->setBlendMode(static_cast<SkBlendMode>(tmp_u8));

     SkColor co;
     fuzz->next(&co);
     p->setColor(co);

     fuzz->next(&b);
     p->setDither(b);

     fuzz->nextRange(&tmp_u8, 0, (int)kHigh_SkFilterQuality);
     p->setFilterQuality(static_cast<SkFilterQuality>(tmp_u8));

     fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kFull_Hinting);
     p->setHinting(static_cast<SkPaint::Hinting>(tmp_u8));

     fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kLast_Cap);
     p->setStrokeCap(static_cast<SkPaint::Cap>(tmp_u8));

     fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kLast_Join);
     p->setStrokeJoin(static_cast<SkPaint::Join>(tmp_u8));

     SkScalar sc;
     fuzz->next(&sc);
     p->setStrokeMiter(sc);

     fuzz->next(&sc);
     p->setStrokeWidth(sc);

     fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kStrokeAndFill_Style);
     p->setStyle(static_cast<SkPaint::Style>(tmp_u8));
 }

 static void init_bitmap(Fuzz* fuzz, SkBitmap* bmp) {
     uint8_t colorType;
     fuzz->nextRange(&colorType, 0, (int)kLastEnum_SkColorType);
     // ColorType needs to match what the system configuration is.
     if (colorType == kRGBA_8888_SkColorType || colorType == kBGRA_8888_SkColorType) {
         colorType = kN32_SkColorType;
     }
     bool b;
     fuzz->next(&b);
     SkImageInfo info = SkImageInfo::Make(kBmpSize,
                                          kBmpSize,
                                          (SkColorType)colorType,
                                          b ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
     if (!bmp->tryAllocPixels(info)) {
         SkDebugf("Bitmap not allocated\n");
     }
     SkColor c;
     fuzz->next(&c);
     bmp->eraseColor(c);

     fuzz->next(&b);
     SkPaint p;
     if (b) {
         init_paint(fuzz, &p);
     }
     else {
         fuzz->next(&c);
         p.setColor(c);
     }
 }

 static void init_surface(Fuzz* fuzz, sk_sp<SkSurface>* s) {
     uint8_t x, y;
     fuzz->nextRange(&x, 1, kMaxX);
     fuzz->nextRange(&y, 1, kMaxY);
     *s = SkSurface::MakeRasterN32Premul(x, y);
 }


 static void fuzz_drawText(Fuzz* fuzz, sk_sp<SkTypeface> font) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     char text[kTxtLen];
     init_string(fuzz, text, kTxtLen);

     SkScalar x, y;
     fuzz->next(&x, &y);
     // populate pts array
     SkPoint pts[kPtsLen];
     for (uint8_t i = 0; i < kPtsLen; ++i) {
         pts[i].set(x, y);
         x += p.getTextSize();
     }

     p.setTypeface(font);
     // set text related attributes
     bool b;
     fuzz->next(&b);
     p.setAutohinted(b);
     fuzz->next(&b);
     p.setDevKernText(b);
     fuzz->next(&b);
     p.setEmbeddedBitmapText(b);
     fuzz->next(&b);
     p.setFakeBoldText(b);
     fuzz->next(&b);
     p.setLCDRenderText(b);
     fuzz->next(&b);
     p.setLinearText(b);
     fuzz->next(&b);
     p.setSubpixelText(b);
     fuzz->next(&x);
     p.setTextScaleX(x);
     fuzz->next(&x);
     p.setTextSkewX(x);
     fuzz->next(&x);
     p.setTextSize(x);
     fuzz->next(&b);
     p.setVerticalText(b);

     SkCanvas* cnv = surface->getCanvas();
     cnv->drawPosText(text, (kTxtLen-1), pts, p);

     fuzz->next(&x);
     fuzz->next(&y);
     cnv->drawText(text, (kTxtLen-1), x, y, p);
 }

 static void fuzz_drawCircle(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     SkScalar a, b, c;
     fuzz->next(&a, &b, &c);
     surface->getCanvas()->drawCircle(a, b, c, p);
 }

 static void fuzz_drawLine(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     SkScalar a, b, c, d;
     fuzz->next(&a, &b, &c, &d);
     surface->getCanvas()->drawLine(a, b, c, d, p);
 }

 static void fuzz_drawRect(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     SkScalar a, b, c, d;
     fuzz->next(&a, &b, &c, &d);
     SkRect r;
     r = SkRect::MakeXYWH(a, b, c, d);

     SkCanvas* cnv = surface->getCanvas();
     cnv->drawRect(r, p);

     bool bl;
     fuzz->next(&bl);
     fuzz->next(&a, &b, &c, &d);
     r = SkRect::MakeXYWH(a, b, c, d);
     cnv->clipRect(r, kIntersect_SkClipOp, bl);
 }

 static void fuzz_drawPath(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     // TODO(kjlubick): put the ability to fuzz a path in shared file, with
     // other common things (e.g. rects, lines)
     uint8_t i, j;
     fuzz->nextRange(&i, 0, 10); // set i to number of operations to perform
     SkPath path;
     SkScalar a, b, c, d, e, f;
     for (int k = 0; k < i; ++k) {
         fuzz->nextRange(&j, 0, 5); // set j to choose operation to perform
         switch (j) {
             case 0:
                 fuzz->next(&a, &b);
                 path.moveTo(a, b);
                 break;
             case 1:
                 fuzz->next(&a, &b);
                 path.lineTo(a, b);
                 break;
             case 2:
                 fuzz->next(&a, &b, &c, &d);
                 path.quadTo(a, b, c, d);
                 break;
             case 3:
                 fuzz->next(&a, &b, &c, &d, &e);
                 path.conicTo(a, b, c, d, e);
                 break;
             case 4:
                 fuzz->next(&a, &b, &c, &d, &e, &f);
                 path.cubicTo(a, b, c, d, e, f);
                 break;
             case 5:
                 fuzz->next(&a, &b, &c, &d, &e);
                 path.arcTo(a, b, c, d, e);
                 break;
         }
     }
     path.close();

     SkCanvas* cnv = surface->getCanvas();
     cnv->drawPath(path, p);

     bool bl;
     fuzz->next(&bl);
     cnv->clipPath(path, kIntersect_SkClipOp, bl);
 }

 static void fuzz_drawBitmap(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);
     SkBitmap bmp;
     init_bitmap(fuzz, &bmp);

     SkScalar a, b;
     fuzz->next(&a, &b);
     surface->getCanvas()->drawBitmap(bmp, a, b, &p);
 }

 static void fuzz_drawImage(Fuzz* fuzz) {
     SkPaint p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);
     SkBitmap bmp;
     init_bitmap(fuzz, &bmp);

     sk_sp<SkImage> image(SkImage::MakeFromBitmap(bmp));

     bool bl;
     fuzz->next(&bl);
     SkScalar a, b;
     fuzz->next(&a, &b);
     if (bl) {
         surface->getCanvas()->drawImage(image, a, b, &p);
     }
     else {
         SkRect dst = SkRect::MakeWH(a, b);
         fuzz->next(&a, &b);
         SkRect src = SkRect::MakeWH(a, b);
         uint8_t x;
         fuzz->nextRange(&x, 0, 1);
         SkCanvas::SrcRectConstraint cst = (SkCanvas::SrcRectConstraint)x;
         surface->getCanvas()->drawImageRect(image, src, dst, &p, cst);
     }
 }

 static void fuzz_drawPaint(Fuzz* fuzz) {
     SkPaint l, p;
     init_paint(fuzz, &p);
     sk_sp<SkSurface> surface;
     init_surface(fuzz, &surface);

     // add layers
     uint8_t x;
     fuzz->nextRange(&x, 1, 3); // max 3 layers
     SkLayerRasterizer::Builder builder;
     for (int i = 0; i < x; i++) {
         init_paint(fuzz, &l);
         builder.addLayer(l);
     }

     sk_sp<SkLayerRasterizer> raster(builder.detach());
     p.setRasterizer(raster);

     surface->getCanvas()->drawPaint(p);
 }

 DEF_FUZZ(DrawFunctions, fuzz) {
     uint8_t i;
     fuzz->next(&i);

     switch(i) {
         case 0: {
             sk_sp<SkTypeface> f = SkTypeface::MakeDefault();
             if (f == nullptr) {
               SkDebugf("Could not initialize font.\n");
               fuzz->signalBug();
             }
             SkDebugf("Fuzz DrawText\n");
             fuzz_drawText(fuzz, f);
             return;
         }
         case 1:
             SkDebugf("Fuzz DrawRect\n");
             fuzz_drawRect(fuzz);
             return;
         case 2:
             SkDebugf("Fuzz DrawCircle\n");
             fuzz_drawCircle(fuzz);
             return;
         case 3:
             SkDebugf("Fuzz DrawLine\n");
             fuzz_drawLine(fuzz);
             return;
         case 4:
             SkDebugf("Fuzz DrawPath\n");
             fuzz_drawPath(fuzz);
             return;
         case 5:
             SkDebugf("Fuzz DrawImage/DrawImageRect\n");
             fuzz_drawImage(fuzz);
             return;
         case 6:
             SkDebugf("Fuzz DrawBitmap\n");
             fuzz_drawBitmap(fuzz);
             return;
         case 7:
             SkDebugf("Fuzz DrawPaint\n");
             fuzz_drawPaint(fuzz);
             return;
     }
 }
	/*
	* Copyright 2016 Mozilla Foundation
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "Fuzz.h"
	#include "SkBitmap.h"
	#include "SkCanvas.h"
	#include "SkImage.h"
	#include "SkLayerRasterizer.h"
	#include "SkPath.h"
	#include "SkSurface.h"
	#include "SkTypeface.h"
	#include "SkClipOpPriv.h"

	static const int kBmpSize = 24;
	static const int kMaxX = 250;
	static const int kMaxY = 250;
	static const int kPtsLen = 10;
	static const int kTxtLen = 5;

	static void init_string(Fuzz* fuzz, char* str, size_t bufSize) {
	for (size_t i = 0; i < bufSize-1; ++i) {
	fuzz->nextRange(&str[i], 0x20, 0x7E); // printable ASCII
	}
	str[bufSize-1] = '\0';
	}

	// make_paint mostly borrowed from FilterFuzz.cpp
	static void init_paint(Fuzz* fuzz, SkPaint* p) {
	bool b;
	fuzz->next(&b);
	p->setAntiAlias(b);

	uint8_t tmp_u8;
	fuzz->nextRange(&tmp_u8, 0, (int)SkBlendMode::kLastMode);
	p->setBlendMode(static_cast<SkBlendMode>(tmp_u8));

	SkColor co;
	fuzz->next(&co);
	p->setColor(co);

	fuzz->next(&b);
	p->setDither(b);

	fuzz->nextRange(&tmp_u8, 0, (int)kHigh_SkFilterQuality);
	p->setFilterQuality(static_cast<SkFilterQuality>(tmp_u8));

	fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kFull_Hinting);
	p->setHinting(static_cast<SkPaint::Hinting>(tmp_u8));

	fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kLast_Cap);
	p->setStrokeCap(static_cast<SkPaint::Cap>(tmp_u8));

	fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kLast_Join);
	p->setStrokeJoin(static_cast<SkPaint::Join>(tmp_u8));

	SkScalar sc;
	fuzz->next(&sc);
	p->setStrokeMiter(sc);

	fuzz->next(&sc);
	p->setStrokeWidth(sc);

	fuzz->nextRange(&tmp_u8, 0, (int)SkPaint::kStrokeAndFill_Style);
	p->setStyle(static_cast<SkPaint::Style>(tmp_u8));
	}

	static void init_bitmap(Fuzz* fuzz, SkBitmap* bmp) {
	uint8_t colorType;
	fuzz->nextRange(&colorType, 0, (int)kLastEnum_SkColorType);
	// ColorType needs to match what the system configuration is.
	if (colorType == kRGBA_8888_SkColorType \|\| colorType == kBGRA_8888_SkColorType) {
	colorType = kN32_SkColorType;
	}
	bool b;
	fuzz->next(&b);
	SkImageInfo info = SkImageInfo::Make(kBmpSize,
	kBmpSize,
	(SkColorType)colorType,
	b ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
	if (!bmp->tryAllocPixels(info)) {
	SkDebugf("Bitmap not allocated\n");
	}
	SkColor c;
	fuzz->next(&c);
	bmp->eraseColor(c);

	fuzz->next(&b);
	SkPaint p;
	if (b) {
	init_paint(fuzz, &p);
	}
	else {
	fuzz->next(&c);
	p.setColor(c);
	}
	}

	static void init_surface(Fuzz* fuzz, sk_sp<SkSurface>* s) {
	uint8_t x, y;
	fuzz->nextRange(&x, 1, kMaxX);
	fuzz->nextRange(&y, 1, kMaxY);
	*s = SkSurface::MakeRasterN32Premul(x, y);
	}


	static void fuzz_drawText(Fuzz* fuzz, sk_sp<SkTypeface> font) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	char text[kTxtLen];
	init_string(fuzz, text, kTxtLen);

	SkScalar x, y;
	fuzz->next(&x, &y);
	// populate pts array
	SkPoint pts[kPtsLen];
	for (uint8_t i = 0; i < kPtsLen; ++i) {
	pts[i].set(x, y);
	x += p.getTextSize();
	}

	p.setTypeface(font);
	// set text related attributes
	bool b;
	fuzz->next(&b);
	p.setAutohinted(b);
	fuzz->next(&b);
	p.setDevKernText(b);
	fuzz->next(&b);
	p.setEmbeddedBitmapText(b);
	fuzz->next(&b);
	p.setFakeBoldText(b);
	fuzz->next(&b);
	p.setLCDRenderText(b);
	fuzz->next(&b);
	p.setLinearText(b);
	fuzz->next(&b);
	p.setSubpixelText(b);
	fuzz->next(&x);
	p.setTextScaleX(x);
	fuzz->next(&x);
	p.setTextSkewX(x);
	fuzz->next(&x);
	p.setTextSize(x);
	fuzz->next(&b);
	p.setVerticalText(b);

	SkCanvas* cnv = surface->getCanvas();
	cnv->drawPosText(text, (kTxtLen-1), pts, p);

	fuzz->next(&x);
	fuzz->next(&y);
	cnv->drawText(text, (kTxtLen-1), x, y, p);
	}

	static void fuzz_drawCircle(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	SkScalar a, b, c;
	fuzz->next(&a, &b, &c);
	surface->getCanvas()->drawCircle(a, b, c, p);
	}

	static void fuzz_drawLine(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	SkScalar a, b, c, d;
	fuzz->next(&a, &b, &c, &d);
	surface->getCanvas()->drawLine(a, b, c, d, p);
	}

	static void fuzz_drawRect(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	SkScalar a, b, c, d;
	fuzz->next(&a, &b, &c, &d);
	SkRect r;
	r = SkRect::MakeXYWH(a, b, c, d);

	SkCanvas* cnv = surface->getCanvas();
	cnv->drawRect(r, p);

	bool bl;
	fuzz->next(&bl);
	fuzz->next(&a, &b, &c, &d);
	r = SkRect::MakeXYWH(a, b, c, d);
	cnv->clipRect(r, kIntersect_SkClipOp, bl);
	}

	static void fuzz_drawPath(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	// TODO(kjlubick): put the ability to fuzz a path in shared file, with
	// other common things (e.g. rects, lines)
	uint8_t i, j;
	fuzz->nextRange(&i, 0, 10); // set i to number of operations to perform
	SkPath path;
	SkScalar a, b, c, d, e, f;
	for (int k = 0; k < i; ++k) {
	fuzz->nextRange(&j, 0, 5); // set j to choose operation to perform
	switch (j) {
	case 0:
	fuzz->next(&a, &b);
	path.moveTo(a, b);
	break;
	case 1:
	fuzz->next(&a, &b);
	path.lineTo(a, b);
	break;
	case 2:
	fuzz->next(&a, &b, &c, &d);
	path.quadTo(a, b, c, d);
	break;
	case 3:
	fuzz->next(&a, &b, &c, &d, &e);
	path.conicTo(a, b, c, d, e);
	break;
	case 4:
	fuzz->next(&a, &b, &c, &d, &e, &f);
	path.cubicTo(a, b, c, d, e, f);
	break;
	case 5:
	fuzz->next(&a, &b, &c, &d, &e);
	path.arcTo(a, b, c, d, e);
	break;
	}
	}
	path.close();

	SkCanvas* cnv = surface->getCanvas();
	cnv->drawPath(path, p);

	bool bl;
	fuzz->next(&bl);
	cnv->clipPath(path, kIntersect_SkClipOp, bl);
	}

	static void fuzz_drawBitmap(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);
	SkBitmap bmp;
	init_bitmap(fuzz, &bmp);

	SkScalar a, b;
	fuzz->next(&a, &b);
	surface->getCanvas()->drawBitmap(bmp, a, b, &p);
	}

	static void fuzz_drawImage(Fuzz* fuzz) {
	SkPaint p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);
	SkBitmap bmp;
	init_bitmap(fuzz, &bmp);

	sk_sp<SkImage> image(SkImage::MakeFromBitmap(bmp));

	bool bl;
	fuzz->next(&bl);
	SkScalar a, b;
	fuzz->next(&a, &b);
	if (bl) {
	surface->getCanvas()->drawImage(image, a, b, &p);
	}
	else {
	SkRect dst = SkRect::MakeWH(a, b);
	fuzz->next(&a, &b);
	SkRect src = SkRect::MakeWH(a, b);
	uint8_t x;
	fuzz->nextRange(&x, 0, 1);
	SkCanvas::SrcRectConstraint cst = (SkCanvas::SrcRectConstraint)x;
	surface->getCanvas()->drawImageRect(image, src, dst, &p, cst);
	}
	}

	static void fuzz_drawPaint(Fuzz* fuzz) {
	SkPaint l, p;
	init_paint(fuzz, &p);
	sk_sp<SkSurface> surface;
	init_surface(fuzz, &surface);

	// add layers
	uint8_t x;
	fuzz->nextRange(&x, 1, 3); // max 3 layers
	SkLayerRasterizer::Builder builder;
	for (int i = 0; i < x; i++) {
	init_paint(fuzz, &l);
	builder.addLayer(l);
	}

	sk_sp<SkLayerRasterizer> raster(builder.detach());
	p.setRasterizer(raster);

	surface->getCanvas()->drawPaint(p);
	}

	DEF_FUZZ(DrawFunctions, fuzz) {
	uint8_t i;
	fuzz->next(&i);

	switch(i) {
	case 0: {
	sk_sp<SkTypeface> f = SkTypeface::MakeDefault();
	if (f == nullptr) {
	SkDebugf("Could not initialize font.\n");
	fuzz->signalBug();
	}
	SkDebugf("Fuzz DrawText\n");
	fuzz_drawText(fuzz, f);
	return;
	}
	case 1:
	SkDebugf("Fuzz DrawRect\n");
	fuzz_drawRect(fuzz);
	return;
	case 2:
	SkDebugf("Fuzz DrawCircle\n");
	fuzz_drawCircle(fuzz);
	return;
	case 3:
	SkDebugf("Fuzz DrawLine\n");
	fuzz_drawLine(fuzz);
	return;
	case 4:
	SkDebugf("Fuzz DrawPath\n");
	fuzz_drawPath(fuzz);
	return;
	case 5:
	SkDebugf("Fuzz DrawImage/DrawImageRect\n");
	fuzz_drawImage(fuzz);
	return;
	case 6:
	SkDebugf("Fuzz DrawBitmap\n");
	fuzz_drawBitmap(fuzz);
	return;
	case 7:
	SkDebugf("Fuzz DrawPaint\n");
	fuzz_drawPaint(fuzz);
	return;
	}
	}