gm/drawbitmaprect.cpp - skia - Git at Google

 /*
  * 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 "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
 #include "SkShader.h"
 #include "SkImage.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;
         }
     }
     bm.unlockPixels();
     return bm;
 }

 static SkImage* image_from_bitmap(const SkBitmap& bm) {
     SkBitmap b(bm);
     b.lockPixels();
     return SkImage::NewRasterCopy(b.info(), b.getPixels(), b.rowBytes());
 }

 static SkImage* makebm(SkBitmap* bm, int w, int h) {
     bm->allocN32Pixels(w, h);
     bm->eraseColor(SK_ColorTRANSPARENT);

     SkCanvas    canvas(*bm);

     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::CreateRadial(
                         pt, radius,
                         colors, pos,
                         SK_ARRAY_COUNT(colors),
                         SkShader::kRepeat_TileMode,
                         0, &mat))->unref();
         canvas.drawRect(rect, paint);
         rect.inset(wScalar / 8, hScalar / 8);
         mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
     }
     // Let backends know we won't change this, so they don't have to deep copy it defensively.
     bm->setImmutable();

     return image_from_bitmap(*bm);
 }

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

 static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect* srcIR,
                       const SkRect& dstR) {
     SkRect storage, *srcR = NULL;
     if (srcIR) {
         storage.set(*srcIR);
         srcR = &storage;
     }
     canvas->drawImageRect(image, srcR, dstR);
 }

 static void imagescaleproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect* srcIR,
                            const SkRect& dstR) {
     const int newW = SkScalarRoundToInt(dstR.width());
     const int newH = SkScalarRoundToInt(dstR.height());
     SkAutoTUnref<SkImage> newImage(image->newImage(newW, newH, srcIR));

 #ifdef SK_DEBUG
     const SkIRect baseR = SkIRect::MakeWH(image->width(), image->height());
     const bool containsSubset = !srcIR || baseR.contains(*srcIR);
 #endif

     if (newImage) {
         SkASSERT(containsSubset);
         canvas->drawImage(newImage, dstR.x(), dstR.y());
     } else {
         // newImage() does not support subsets that are not contained by the original
         // but drawImageRect does, so we just draw an X in its place to indicate that we are
         // deliberately not drawing here.
         SkASSERT(!containsSubset);
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(4);
         canvas->drawLine(4, 4, newW - 4.0f, newH - 4.0f, paint);
         canvas->drawLine(4, newH - 4.0f, newW - 4.0f, 4, paint);
     }
 }

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

 static const int gSize = 1024;
 static const 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;
     SkAutoTUnref<SkImage> fImage;
     SkString              fName;

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

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

     void onOnceBeforeDraw() override {
         fImage.reset(makebm(&fLargeBitmap, gBmpSize, gBmpSize));
     }

     void onDraw(SkCanvas* canvas) override {
         SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
         static const int kMaxSrcRectSize = 1 << (SkNextLog2(gBmpSize) + 2);

         static const int kPadX = 30;
         static const int kPadY = 40;
         SkPaint paint;
         paint.setAlpha(0x20);
         canvas->drawBitmapRect(fLargeBitmap, NULL,
                                SkRect::MakeWH(gSize * SK_Scalar1,
                                               gSize * SK_Scalar1),
                                &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, fLargeBitmap, &srcRect, dstRect);

                 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);
             SkMaskFilter* mf = SkBlurMaskFilter::Create(
                 kNormal_SkBlurStyle,
                 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
                 SkBlurMaskFilter::kHighQuality_BlurFlag |
                 SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
             paint.setMaskFilter(mf)->unref();
             canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint);
         }
     }

 private:
     typedef skiagm::GM INHERITED;
 };

 DEF_GM( return new DrawBitmapRectGM(canvasproc, NULL); )
 DEF_GM( return new DrawBitmapRectGM(imageproc, "-imagerect"); )
 DEF_GM( return new DrawBitmapRectGM(imagescaleproc, "-imagescale"); )
	/*
	* 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 "SkBlurMask.h"
	#include "SkBlurMaskFilter.h"
	#include "SkColorPriv.h"
	#include "SkGradientShader.h"
	#include "SkShader.h"
	#include "SkImage.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;
	}
	}
	bm.unlockPixels();
	return bm;
	}

	static SkImage* image_from_bitmap(const SkBitmap& bm) {
	SkBitmap b(bm);
	b.lockPixels();
	return SkImage::NewRasterCopy(b.info(), b.getPixels(), b.rowBytes());
	}

	static SkImage* makebm(SkBitmap* bm, int w, int h) {
	bm->allocN32Pixels(w, h);
	bm->eraseColor(SK_ColorTRANSPARENT);

	SkCanvas canvas(*bm);

	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::CreateRadial(
	pt, radius,
	colors, pos,
	SK_ARRAY_COUNT(colors),
	SkShader::kRepeat_TileMode,
	0, &mat))->unref();
	canvas.drawRect(rect, paint);
	rect.inset(wScalar / 8, hScalar / 8);
	mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
	}
	// Let backends know we won't change this, so they don't have to deep copy it defensively.
	bm->setImmutable();

	return image_from_bitmap(*bm);
	}

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

	static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect* srcIR,
	const SkRect& dstR) {
	SkRect storage, *srcR = NULL;
	if (srcIR) {
	storage.set(*srcIR);
	srcR = &storage;
	}
	canvas->drawImageRect(image, srcR, dstR);
	}

	static void imagescaleproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect* srcIR,
	const SkRect& dstR) {
	const int newW = SkScalarRoundToInt(dstR.width());
	const int newH = SkScalarRoundToInt(dstR.height());
	SkAutoTUnref<SkImage> newImage(image->newImage(newW, newH, srcIR));

	#ifdef SK_DEBUG
	const SkIRect baseR = SkIRect::MakeWH(image->width(), image->height());
	const bool containsSubset = !srcIR \|\| baseR.contains(*srcIR);
	#endif

	if (newImage) {
	SkASSERT(containsSubset);
	canvas->drawImage(newImage, dstR.x(), dstR.y());
	} else {
	// newImage() does not support subsets that are not contained by the original
	// but drawImageRect does, so we just draw an X in its place to indicate that we are
	// deliberately not drawing here.
	SkASSERT(!containsSubset);
	SkPaint paint;
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setStrokeWidth(4);
	canvas->drawLine(4, 4, newW - 4.0f, newH - 4.0f, paint);
	canvas->drawLine(4, newH - 4.0f, newW - 4.0f, 4, paint);
	}
	}

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

	static const int gSize = 1024;
	static const 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;
	SkAutoTUnref<SkImage> fImage;
	SkString fName;

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

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

	void onOnceBeforeDraw() override {
	fImage.reset(makebm(&fLargeBitmap, gBmpSize, gBmpSize));
	}

	void onDraw(SkCanvas* canvas) override {
	SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
	static const int kMaxSrcRectSize = 1 << (SkNextLog2(gBmpSize) + 2);

	static const int kPadX = 30;
	static const int kPadY = 40;
	SkPaint paint;
	paint.setAlpha(0x20);
	canvas->drawBitmapRect(fLargeBitmap, NULL,
	SkRect::MakeWH(gSize * SK_Scalar1,
	gSize * SK_Scalar1),
	&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, fLargeBitmap, &srcRect, dstRect);

	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);
	SkMaskFilter* mf = SkBlurMaskFilter::Create(
	kNormal_SkBlurStyle,
	SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
	SkBlurMaskFilter::kHighQuality_BlurFlag \|
	SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
	paint.setMaskFilter(mf)->unref();
	canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint);
	}
	}

	private:
	typedef skiagm::GM INHERITED;
	};

	DEF_GM( return new DrawBitmapRectGM(canvasproc, NULL); )
	DEF_GM( return new DrawBitmapRectGM(imageproc, "-imagerect"); )
	DEF_GM( return new DrawBitmapRectGM(imagescaleproc, "-imagescale"); )