gm/drawbitmaprect.cpp - platform/external/skia - Gitiles

 /*
  * 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 "gm.h"
 #include "sk_tool_utils.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
 #include "SkImage.h"
 #include "SkImage_Base.h"
 #include "SkMathPriv.h"
 #include "SkShader.h"
 #include "SkSurface.h"


 static SkBitmap make_chessbm(int w, int h) {
     SkBitmap bm;
     bm.allocN32Pixels(w, h);

     for (int y = 0; y < bm.height(); y++) {
         uint32_t* p = bm.getAddr32(0, y);
         for (int x = 0; x < bm.width(); x++) {
             p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
         }
     }
     return bm;
 }

 // Creates a bitmap and a matching image.
 static sk_sp<SkImage> makebm(SkCanvas* origCanvas, SkBitmap* resultBM, int w, int h) {
     SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);

     auto surface(origCanvas->makeSurface(info));
     if (nullptr == surface) {
         // picture canvas will return null, so fall-back to raster
         surface = SkSurface::MakeRaster(info);
     }

     SkCanvas* canvas = surface->getCanvas();

     canvas->clear(SK_ColorTRANSPARENT);

     SkScalar wScalar = SkIntToScalar(w);
     SkScalar hScalar = SkIntToScalar(h);

     SkPoint     pt = { wScalar / 2, hScalar / 2 };

     SkScalar    radius = 4 * SkMaxScalar(wScalar, hScalar);

     SkColor     colors[] = { SK_ColorRED, SK_ColorYELLOW,
                              SK_ColorGREEN, SK_ColorMAGENTA,
                              SK_ColorBLUE, SK_ColorCYAN,
                              SK_ColorRED};

     SkScalar    pos[] = {0,
                          SK_Scalar1 / 6,
                          2 * SK_Scalar1 / 6,
                          3 * SK_Scalar1 / 6,
                          4 * SK_Scalar1 / 6,
                          5 * SK_Scalar1 / 6,
                          SK_Scalar1};

     SkPaint     paint;
     SkRect rect = SkRect::MakeWH(wScalar, hScalar);
     SkMatrix mat = SkMatrix::I();
     for (int i = 0; i < 4; ++i) {
         paint.setShader(SkGradientShader::MakeRadial(
                         pt, radius,
                         colors, pos,
                         SK_ARRAY_COUNT(colors),
                         SkShader::kRepeat_TileMode,
                         0, &mat));
         canvas->drawRect(rect, paint);
         rect.inset(wScalar / 8, hScalar / 8);
         mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
     }

     auto image = surface->makeImageSnapshot();

     SkBitmap tempBM;

     image->asLegacyBitmap(&tempBM, SkImage::kRO_LegacyBitmapMode);

     // Let backends know we won't change this, so they don't have to deep copy it defensively.
     tempBM.setImmutable();
     *resultBM = tempBM;

     return image;
 }

 static void bitmapproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
                        const SkRect& dstR, const SkPaint* paint) {
     canvas->drawBitmapRect(bm, srcR, dstR, paint);
 }

 static void bitmapsubsetproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
                              const SkRect& dstR, const SkPaint* paint) {
     if (!bm.bounds().contains(srcR)) {
         bitmapproc(canvas, nullptr, bm, srcR, dstR, paint);
         return;
     }

     SkBitmap subset;
     if (bm.extractSubset(&subset, srcR)) {
         canvas->drawBitmapRect(subset, dstR, paint);
     }
 }

 static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcR,
                       const SkRect& dstR, const SkPaint* paint) {
     canvas->drawImageRect(image, srcR, dstR, paint);
 }

 static void imagesubsetproc(SkCanvas* canvas, SkImage* image, const SkBitmap& bm,
                             const SkIRect& srcR, const SkRect& dstR, const SkPaint* paint) {
     if (!image->bounds().contains(srcR)) {
         imageproc(canvas, image, bm, srcR, dstR, paint);
         return;
     }

     if (sk_sp<SkImage> subset = image->makeSubset(srcR)) {
         canvas->drawImageRect(subset, dstR, paint);
     }
 }

 typedef void DrawRectRectProc(SkCanvas*, SkImage*, const SkBitmap&, const SkIRect&, const SkRect&,
                               const SkPaint*);

 constexpr int gSize = 1024;
 constexpr int gBmpSize = 2048;

 class DrawBitmapRectGM : public skiagm::GM {
 public:
     DrawBitmapRectGM(DrawRectRectProc proc, const char suffix[]) : fProc(proc) {
         fName.set("drawbitmaprect");
         if (suffix) {
             fName.append(suffix);
         }
     }

     DrawRectRectProc*   fProc;
     SkBitmap            fLargeBitmap;
     sk_sp<SkImage>      fImage;
     SkString            fName;

 protected:
     SkString onShortName() override { return fName; }

     SkISize onISize() override { return SkISize::Make(gSize, gSize); }

     void setupImage(SkCanvas* canvas) {
         fImage = makebm(canvas, &fLargeBitmap, gBmpSize, gBmpSize);
     }

     void onDraw(SkCanvas* canvas) override {
         if (!fImage) {
             this->setupImage(canvas);
         }

         SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
         const int kMaxSrcRectSize = 1 << (SkNextLog2(gBmpSize) + 2);

         const int kPadX = 30;
         const int kPadY = 40;
         SkPaint paint;
         paint.setAlpha(0x20);
         canvas->drawImageRect(fImage, SkRect::MakeIWH(gSize, gSize), &paint);
         canvas->translate(SK_Scalar1 * kPadX / 2,
                           SK_Scalar1 * kPadY / 2);
         SkPaint blackPaint;
         SkScalar titleHeight = SK_Scalar1 * 24;
         blackPaint.setColor(SK_ColorBLACK);
         blackPaint.setTextSize(titleHeight);
         blackPaint.setAntiAlias(true);
         sk_tool_utils::set_portable_typeface(&blackPaint);
         SkString title;
         title.printf("Bitmap size: %d x %d", gBmpSize, gBmpSize);
         canvas->drawText(title.c_str(), title.size(), 0,
                          titleHeight, blackPaint);

         canvas->translate(0, SK_Scalar1 * kPadY / 2  + titleHeight);
         int rowCount = 0;
         canvas->save();
         for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
             for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {

                 SkIRect srcRect = SkIRect::MakeXYWH((gBmpSize - w) / 2, (gBmpSize - h) / 2, w, h);
                 fProc(canvas, fImage.get(), fLargeBitmap, srcRect, dstRect, nullptr);

                 SkString label;
                 label.appendf("%d x %d", w, h);
                 blackPaint.setAntiAlias(true);
                 blackPaint.setStyle(SkPaint::kFill_Style);
                 blackPaint.setTextSize(SK_Scalar1 * 10);
                 SkScalar baseline = dstRect.height() +
                                     blackPaint.getTextSize() + SK_Scalar1 * 3;
                 canvas->drawText(label.c_str(), label.size(),
                                     0, baseline,
                                     blackPaint);
                 blackPaint.setStyle(SkPaint::kStroke_Style);
                 blackPaint.setStrokeWidth(SK_Scalar1);
                 blackPaint.setAntiAlias(false);
                 canvas->drawRect(dstRect, blackPaint);

                 canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
                 ++rowCount;
                 if ((dstRect.width() + kPadX) * rowCount > gSize) {
                     canvas->restore();
                     canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
                     canvas->save();
                     rowCount = 0;
                 }
             }
         }

         {
             // test the following code path:
             // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
             SkIRect srcRect;
             SkPaint paint;
             SkBitmap bm;

             bm = make_chessbm(5, 5);
             paint.setFilterQuality(kLow_SkFilterQuality);

             srcRect.setXYWH(1, 1, 3, 3);
             paint.setMaskFilter(SkBlurMaskFilter::Make(
                 kNormal_SkBlurStyle,
                 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
                 SkBlurMaskFilter::kHighQuality_BlurFlag));

             sk_sp<SkImage> image(SkImage::MakeFromBitmap(bm));
             fProc(canvas, image.get(), bm, srcRect, dstRect, &paint);
         }
     }

 private:
     typedef skiagm::GM INHERITED;
 };

 DEF_GM( return new DrawBitmapRectGM(bitmapproc      , nullptr); )
 DEF_GM( return new DrawBitmapRectGM(bitmapsubsetproc, "-subset"); )
 DEF_GM( return new DrawBitmapRectGM(imageproc       , "-imagerect"); )
 DEF_GM( return new DrawBitmapRectGM(imagesubsetproc , "-imagerect-subset"); )
	/*
	* 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 "gm.h"
	#include "sk_tool_utils.h"
	#include "SkBlurMask.h"
	#include "SkBlurMaskFilter.h"
	#include "SkColorPriv.h"
	#include "SkGradientShader.h"
	#include "SkImage.h"
	#include "SkImage_Base.h"
	#include "SkMathPriv.h"
	#include "SkShader.h"
	#include "SkSurface.h"


	static SkBitmap make_chessbm(int w, int h) {
	SkBitmap bm;
	bm.allocN32Pixels(w, h);

	for (int y = 0; y < bm.height(); y++) {
	uint32_t* p = bm.getAddr32(0, y);
	for (int x = 0; x < bm.width(); x++) {
	p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
	}
	}
	return bm;
	}

	// Creates a bitmap and a matching image.
	static sk_sp<SkImage> makebm(SkCanvas* origCanvas, SkBitmap* resultBM, int w, int h) {
	SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);

	auto surface(origCanvas->makeSurface(info));
	if (nullptr == surface) {
	// picture canvas will return null, so fall-back to raster
	surface = SkSurface::MakeRaster(info);
	}

	SkCanvas* canvas = surface->getCanvas();

	canvas->clear(SK_ColorTRANSPARENT);

	SkScalar wScalar = SkIntToScalar(w);
	SkScalar hScalar = SkIntToScalar(h);

	SkPoint pt = { wScalar / 2, hScalar / 2 };

	SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar);

	SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
	SK_ColorGREEN, SK_ColorMAGENTA,
	SK_ColorBLUE, SK_ColorCYAN,
	SK_ColorRED};

	SkScalar pos[] = {0,
	SK_Scalar1 / 6,
	2 * SK_Scalar1 / 6,
	3 * SK_Scalar1 / 6,
	4 * SK_Scalar1 / 6,
	5 * SK_Scalar1 / 6,
	SK_Scalar1};

	SkPaint paint;
	SkRect rect = SkRect::MakeWH(wScalar, hScalar);
	SkMatrix mat = SkMatrix::I();
	for (int i = 0; i < 4; ++i) {
	paint.setShader(SkGradientShader::MakeRadial(
	pt, radius,
	colors, pos,
	SK_ARRAY_COUNT(colors),
	SkShader::kRepeat_TileMode,
	0, &mat));
	canvas->drawRect(rect, paint);
	rect.inset(wScalar / 8, hScalar / 8);
	mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
	}

	auto image = surface->makeImageSnapshot();

	SkBitmap tempBM;

	image->asLegacyBitmap(&tempBM, SkImage::kRO_LegacyBitmapMode);

	// Let backends know we won't change this, so they don't have to deep copy it defensively.
	tempBM.setImmutable();
	*resultBM = tempBM;

	return image;
	}

	static void bitmapproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
	const SkRect& dstR, const SkPaint* paint) {
	canvas->drawBitmapRect(bm, srcR, dstR, paint);
	}

	static void bitmapsubsetproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
	const SkRect& dstR, const SkPaint* paint) {
	if (!bm.bounds().contains(srcR)) {
	bitmapproc(canvas, nullptr, bm, srcR, dstR, paint);
	return;
	}

	SkBitmap subset;
	if (bm.extractSubset(&subset, srcR)) {
	canvas->drawBitmapRect(subset, dstR, paint);
	}
	}

	static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcR,
	const SkRect& dstR, const SkPaint* paint) {
	canvas->drawImageRect(image, srcR, dstR, paint);
	}

	static void imagesubsetproc(SkCanvas* canvas, SkImage* image, const SkBitmap& bm,
	const SkIRect& srcR, const SkRect& dstR, const SkPaint* paint) {
	if (!image->bounds().contains(srcR)) {
	imageproc(canvas, image, bm, srcR, dstR, paint);
	return;
	}

	if (sk_sp<SkImage> subset = image->makeSubset(srcR)) {
	canvas->drawImageRect(subset, dstR, paint);
	}
	}

	typedef void DrawRectRectProc(SkCanvas, SkImage, const SkBitmap&, const SkIRect&, const SkRect&,
	const SkPaint*);

	constexpr int gSize = 1024;
	constexpr int gBmpSize = 2048;

	class DrawBitmapRectGM : public skiagm::GM {
	public:
	DrawBitmapRectGM(DrawRectRectProc proc, const char suffix[]) : fProc(proc) {
	fName.set("drawbitmaprect");
	if (suffix) {
	fName.append(suffix);
	}
	}

	DrawRectRectProc* fProc;
	SkBitmap fLargeBitmap;
	sk_sp<SkImage> fImage;
	SkString fName;

	protected:
	SkString onShortName() override { return fName; }

	SkISize onISize() override { return SkISize::Make(gSize, gSize); }

	void setupImage(SkCanvas* canvas) {
	fImage = makebm(canvas, &fLargeBitmap, gBmpSize, gBmpSize);
	}

	void onDraw(SkCanvas* canvas) override {
	if (!fImage) {
	this->setupImage(canvas);
	}

	SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
	const int kMaxSrcRectSize = 1 << (SkNextLog2(gBmpSize) + 2);

	const int kPadX = 30;
	const int kPadY = 40;
	SkPaint paint;
	paint.setAlpha(0x20);
	canvas->drawImageRect(fImage, SkRect::MakeIWH(gSize, gSize), &paint);
	canvas->translate(SK_Scalar1 * kPadX / 2,
	SK_Scalar1 * kPadY / 2);
	SkPaint blackPaint;
	SkScalar titleHeight = SK_Scalar1 * 24;
	blackPaint.setColor(SK_ColorBLACK);
	blackPaint.setTextSize(titleHeight);
	blackPaint.setAntiAlias(true);
	sk_tool_utils::set_portable_typeface(&blackPaint);
	SkString title;
	title.printf("Bitmap size: %d x %d", gBmpSize, gBmpSize);
	canvas->drawText(title.c_str(), title.size(), 0,
	titleHeight, blackPaint);

	canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight);
	int rowCount = 0;
	canvas->save();
	for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
	for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {

	SkIRect srcRect = SkIRect::MakeXYWH((gBmpSize - w) / 2, (gBmpSize - h) / 2, w, h);
	fProc(canvas, fImage.get(), fLargeBitmap, srcRect, dstRect, nullptr);

	SkString label;
	label.appendf("%d x %d", w, h);
	blackPaint.setAntiAlias(true);
	blackPaint.setStyle(SkPaint::kFill_Style);
	blackPaint.setTextSize(SK_Scalar1 * 10);
	SkScalar baseline = dstRect.height() +
	blackPaint.getTextSize() + SK_Scalar1 * 3;
	canvas->drawText(label.c_str(), label.size(),
	0, baseline,
	blackPaint);
	blackPaint.setStyle(SkPaint::kStroke_Style);
	blackPaint.setStrokeWidth(SK_Scalar1);
	blackPaint.setAntiAlias(false);
	canvas->drawRect(dstRect, blackPaint);

	canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
	++rowCount;
	if ((dstRect.width() + kPadX) * rowCount > gSize) {
	canvas->restore();
	canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
	canvas->save();
	rowCount = 0;
	}
	}
	}

	{
	// test the following code path:
	// SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
	SkIRect srcRect;
	SkPaint paint;
	SkBitmap bm;

	bm = make_chessbm(5, 5);
	paint.setFilterQuality(kLow_SkFilterQuality);

	srcRect.setXYWH(1, 1, 3, 3);
	paint.setMaskFilter(SkBlurMaskFilter::Make(
	kNormal_SkBlurStyle,
	SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
	SkBlurMaskFilter::kHighQuality_BlurFlag));

	sk_sp<SkImage> image(SkImage::MakeFromBitmap(bm));
	fProc(canvas, image.get(), bm, srcRect, dstRect, &paint);
	}
	}

	private:
	typedef skiagm::GM INHERITED;
	};

	DEF_GM( return new DrawBitmapRectGM(bitmapproc , nullptr); )
	DEF_GM( return new DrawBitmapRectGM(bitmapsubsetproc, "-subset"); )
	DEF_GM( return new DrawBitmapRectGM(imageproc , "-imagerect"); )
	DEF_GM( return new DrawBitmapRectGM(imagesubsetproc , "-imagerect-subset"); )