gm/downsamplebitmap.cpp - platform/external/skqp - Gitiles

 /*
  * 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 "Resources.h"
 #include "SkGradientShader.h"
 #include "SkTypeface.h"
 #include "SkImageDecoder.h"
 #include "SkStream.h"
 #include "SkPaint.h"

 static void make_checker(SkBitmap* bm, int size, int numChecks) {
     bm->allocN32Pixels(size, size);
     for (int y = 0; y < size; ++y) {
         for (int x = 0; x < size; ++x) {
             SkPMColor* s = bm->getAddr32(x, y);
             int cx = (x * numChecks) / size;
             int cy = (y * numChecks) / size;
             if ((cx+cy)%2) {
                 *s = 0xFFFFFFFF;
             } else {
                 *s = 0xFF000000;
             }
         }
     }
 }

 static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
     sk_tool_utils::set_portable_typeface(paint, name, style);
 }

 class DownsampleBitmapGM : public skiagm::GM {
 public:
     SkBitmap    fBM;
     SkString    fName;
     bool        fBitmapMade;
     SkPaint::FilterLevel fFilterLevel;

     DownsampleBitmapGM(SkPaint::FilterLevel filterLevel)
         : fFilterLevel(filterLevel)
     {
         this->setBGColor(0xFFDDDDDD);
         fBitmapMade = false;
     }

     const char* filterLevelToString() {
         static const char *filterLevelNames[] = {
             "none", "low", "medium", "high"
         };
         return filterLevelNames[fFilterLevel];
     }

 protected:

     SkString onShortName() SK_OVERRIDE {
         return fName;
     }

     SkISize onISize() SK_OVERRIDE {
         make_bitmap_wrapper();
         return SkISize::Make(fBM.width(), 4 * fBM.height());
     }

     void make_bitmap_wrapper() {
         if (!fBitmapMade) {
             fBitmapMade = true;
             make_bitmap();
         }
     }

     virtual void make_bitmap() = 0;

     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         make_bitmap_wrapper();

         int curY = 0;
         int curHeight;
         float curScale = 1;
         do {

             SkMatrix matrix;
             matrix.setScale( curScale, curScale );

             SkPaint paint;
             paint.setFilterLevel(fFilterLevel);

             canvas->save();
             canvas->translate(0, (SkScalar)curY);
             canvas->concat(matrix);
             canvas->drawBitmap(fBM, 0, 0, &paint);
             canvas->restore();

             curHeight = (int) (fBM.height() * curScale + 2);
             curY += curHeight;
             curScale *= 0.75f;
         } while (curHeight >= 2 && curY < 4*fBM.height());
     }

 private:
     typedef skiagm::GM INHERITED;
 };

 class DownsampleBitmapTextGM: public DownsampleBitmapGM {
   public:
       DownsampleBitmapTextGM(float textSize, SkPaint::FilterLevel filterLevel)
       : INHERITED(filterLevel), fTextSize(textSize)
         {
             fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterLevelToString(), fTextSize);
         }

   protected:
       float fTextSize;

       void make_bitmap() SK_OVERRIDE {
           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
           SkCanvas canvas(fBM);
           canvas.drawColor(SK_ColorWHITE);

           SkPaint paint;
           paint.setAntiAlias(true);
           paint.setSubpixelText(true);
           paint.setTextSize(fTextSize);

           setTypeface(&paint, "Times", SkTypeface::kNormal);
           canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
           setTypeface(&paint, "Times", SkTypeface::kBold);
           canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
           setTypeface(&paint, "Times", SkTypeface::kItalic);
           canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
           setTypeface(&paint, "Times", SkTypeface::kBoldItalic);
           canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
       }
   private:
       typedef DownsampleBitmapGM INHERITED;
 };

 class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
   public:
       DownsampleBitmapCheckerboardGM(int size, int numChecks, SkPaint::FilterLevel filterLevel)
       : INHERITED(filterLevel), fSize(size), fNumChecks(numChecks)
         {
             fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterLevelToString(), fSize, fNumChecks);
         }

   protected:
       int fSize;
       int fNumChecks;

       void make_bitmap() SK_OVERRIDE {
           make_checker(&fBM, fSize, fNumChecks);
       }
   private:
       typedef DownsampleBitmapGM INHERITED;
 };

 class DownsampleBitmapImageGM: public DownsampleBitmapGM {
   public:
       DownsampleBitmapImageGM(const char filename[], SkPaint::FilterLevel filterLevel)
       : INHERITED(filterLevel), fFilename(filename)
         {
             fName.printf("downsamplebitmap_image_%s_%s", this->filterLevelToString(), filename);
         }

   protected:
       SkString fFilename;
       int fSize;

       void make_bitmap() SK_OVERRIDE {
           SkImageDecoder* codec = NULL;
           SkString resourcePath = GetResourcePath(fFilename.c_str());
           SkFILEStream stream(resourcePath.c_str());
           if (stream.isValid()) {
               codec = SkImageDecoder::Factory(&stream);
           }
           if (codec) {
               stream.rewind();
               codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
               SkDELETE(codec);
           } else {
               fBM.allocN32Pixels(1, 1);
               *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
           }
           fSize = fBM.height();
       }
   private:
       typedef DownsampleBitmapGM INHERITED;
 };

 #include "SkMipMap.h"

 static void release_mipmap(void*, void* context) {
     ((SkMipMap*)context)->unref();
 }

 class ShowMipLevels : public skiagm::GM {
 public:
     SkBitmap    fBM;

     ShowMipLevels() {
         this->setBGColor(0xFFDDDDDD);
         make_checker(&fBM, 512, 256);
     }

 protected:

     SkString onShortName() SK_OVERRIDE {
         return SkString("showmiplevels");
     }

     SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(fBM.width() + 8, 2 * fBM.height() + 80);
     }

     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkScalar x = 4;
         SkScalar y = 4;
         canvas->drawBitmap(fBM, x, y, NULL);
         y += fBM.height() + 4;

         SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(fBM, NULL));

         SkMipMap::Level level;
         SkScalar scale = 0.5f;
         while (mm->extractLevel(scale, &level)) {
             SkImageInfo info = SkImageInfo::MakeN32Premul(level.fWidth, level.fHeight);
             SkBitmap bm;
             bm.installPixels(info, level.fPixels, level.fRowBytes, NULL,
                              &release_mipmap, (void*)(SkRef(mm.get())));
             bm.setImmutable();
             canvas->drawBitmap(bm, x, y, NULL);
             y += bm.height() + 4;
             scale /= 2;
             if (info.width() == 1 || info.height() == 1) {
                 break;
             }
         }
     }

 private:
     typedef skiagm::GM INHERITED;
 };
 DEF_GM( return new ShowMipLevels; )

 //////////////////////////////////////////////////////////////////////////////

 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kHigh_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kHigh_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
                                             SkPaint::kHigh_FilterLevel); )

 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kMedium_FilterLevel); )
 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kMedium_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kMedium_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
                                            SkPaint::kMedium_FilterLevel); )

 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kLow_FilterLevel); )
 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kLow_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kLow_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
                                            SkPaint::kLow_FilterLevel); )

 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kNone_FilterLevel); )
 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
                                            SkPaint::kNone_FilterLevel); )
	/*
	* 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 "Resources.h"
	#include "SkGradientShader.h"
	#include "SkTypeface.h"
	#include "SkImageDecoder.h"
	#include "SkStream.h"
	#include "SkPaint.h"

	static void make_checker(SkBitmap* bm, int size, int numChecks) {
	bm->allocN32Pixels(size, size);
	for (int y = 0; y < size; ++y) {
	for (int x = 0; x < size; ++x) {
	SkPMColor* s = bm->getAddr32(x, y);
	int cx = (x * numChecks) / size;
	int cy = (y * numChecks) / size;
	if ((cx+cy)%2) {
	*s = 0xFFFFFFFF;
	} else {
	*s = 0xFF000000;
	}
	}
	}
	}

	static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
	sk_tool_utils::set_portable_typeface(paint, name, style);
	}

	class DownsampleBitmapGM : public skiagm::GM {
	public:
	SkBitmap fBM;
	SkString fName;
	bool fBitmapMade;
	SkPaint::FilterLevel fFilterLevel;

	DownsampleBitmapGM(SkPaint::FilterLevel filterLevel)
	: fFilterLevel(filterLevel)
	{
	this->setBGColor(0xFFDDDDDD);
	fBitmapMade = false;
	}

	const char* filterLevelToString() {
	static const char *filterLevelNames[] = {
	"none", "low", "medium", "high"
	};
	return filterLevelNames[fFilterLevel];
	}

	protected:

	SkString onShortName() SK_OVERRIDE {
	return fName;
	}

	SkISize onISize() SK_OVERRIDE {
	make_bitmap_wrapper();
	return SkISize::Make(fBM.width(), 4 * fBM.height());
	}

	void make_bitmap_wrapper() {
	if (!fBitmapMade) {
	fBitmapMade = true;
	make_bitmap();
	}
	}

	virtual void make_bitmap() = 0;

	void onDraw(SkCanvas* canvas) SK_OVERRIDE {
	make_bitmap_wrapper();

	int curY = 0;
	int curHeight;
	float curScale = 1;
	do {

	SkMatrix matrix;
	matrix.setScale( curScale, curScale );

	SkPaint paint;
	paint.setFilterLevel(fFilterLevel);

	canvas->save();
	canvas->translate(0, (SkScalar)curY);
	canvas->concat(matrix);
	canvas->drawBitmap(fBM, 0, 0, &paint);
	canvas->restore();

	curHeight = (int) (fBM.height() * curScale + 2);
	curY += curHeight;
	curScale *= 0.75f;
	} while (curHeight >= 2 && curY < 4*fBM.height());
	}

	private:
	typedef skiagm::GM INHERITED;
	};

	class DownsampleBitmapTextGM: public DownsampleBitmapGM {
	public:
	DownsampleBitmapTextGM(float textSize, SkPaint::FilterLevel filterLevel)
	: INHERITED(filterLevel), fTextSize(textSize)
	{
	fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterLevelToString(), fTextSize);
	}

	protected:
	float fTextSize;

	void make_bitmap() SK_OVERRIDE {
	fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
	SkCanvas canvas(fBM);
	canvas.drawColor(SK_ColorWHITE);

	SkPaint paint;
	paint.setAntiAlias(true);
	paint.setSubpixelText(true);
	paint.setTextSize(fTextSize);

	setTypeface(&paint, "Times", SkTypeface::kNormal);
	canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
	setTypeface(&paint, "Times", SkTypeface::kBold);
	canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
	setTypeface(&paint, "Times", SkTypeface::kItalic);
	canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
	setTypeface(&paint, "Times", SkTypeface::kBoldItalic);
	canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
	}
	private:
	typedef DownsampleBitmapGM INHERITED;
	};

	class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
	public:
	DownsampleBitmapCheckerboardGM(int size, int numChecks, SkPaint::FilterLevel filterLevel)
	: INHERITED(filterLevel), fSize(size), fNumChecks(numChecks)
	{
	fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterLevelToString(), fSize, fNumChecks);
	}

	protected:
	int fSize;
	int fNumChecks;

	void make_bitmap() SK_OVERRIDE {
	make_checker(&fBM, fSize, fNumChecks);
	}
	private:
	typedef DownsampleBitmapGM INHERITED;
	};

	class DownsampleBitmapImageGM: public DownsampleBitmapGM {
	public:
	DownsampleBitmapImageGM(const char filename[], SkPaint::FilterLevel filterLevel)
	: INHERITED(filterLevel), fFilename(filename)
	{
	fName.printf("downsamplebitmap_image_%s_%s", this->filterLevelToString(), filename);
	}

	protected:
	SkString fFilename;
	int fSize;

	void make_bitmap() SK_OVERRIDE {
	SkImageDecoder* codec = NULL;
	SkString resourcePath = GetResourcePath(fFilename.c_str());
	SkFILEStream stream(resourcePath.c_str());
	if (stream.isValid()) {
	codec = SkImageDecoder::Factory(&stream);
	}
	if (codec) {
	stream.rewind();
	codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
	SkDELETE(codec);
	} else {
	fBM.allocN32Pixels(1, 1);
	*(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
	}
	fSize = fBM.height();
	}
	private:
	typedef DownsampleBitmapGM INHERITED;
	};

	#include "SkMipMap.h"

	static void release_mipmap(void, void context) {
	((SkMipMap*)context)->unref();
	}

	class ShowMipLevels : public skiagm::GM {
	public:
	SkBitmap fBM;

	ShowMipLevels() {
	this->setBGColor(0xFFDDDDDD);
	make_checker(&fBM, 512, 256);
	}

	protected:

	SkString onShortName() SK_OVERRIDE {
	return SkString("showmiplevels");
	}

	SkISize onISize() SK_OVERRIDE {
	return SkISize::Make(fBM.width() + 8, 2 * fBM.height() + 80);
	}

	void onDraw(SkCanvas* canvas) SK_OVERRIDE {
	SkScalar x = 4;
	SkScalar y = 4;
	canvas->drawBitmap(fBM, x, y, NULL);
	y += fBM.height() + 4;

	SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(fBM, NULL));

	SkMipMap::Level level;
	SkScalar scale = 0.5f;
	while (mm->extractLevel(scale, &level)) {
	SkImageInfo info = SkImageInfo::MakeN32Premul(level.fWidth, level.fHeight);
	SkBitmap bm;
	bm.installPixels(info, level.fPixels, level.fRowBytes, NULL,
	&release_mipmap, (void*)(SkRef(mm.get())));
	bm.setImmutable();
	canvas->drawBitmap(bm, x, y, NULL);
	y += bm.height() + 4;
	scale /= 2;
	if (info.width() == 1 \|\| info.height() == 1) {
	break;
	}
	}
	}

	private:
	typedef skiagm::GM INHERITED;
	};
	DEF_GM( return new ShowMipLevels; )

	//////////////////////////////////////////////////////////////////////////////

	DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
	DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kHigh_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kHigh_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
	SkPaint::kHigh_FilterLevel); )

	DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kMedium_FilterLevel); )
	DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kMedium_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kMedium_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
	SkPaint::kMedium_FilterLevel); )

	DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kLow_FilterLevel); )
	DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kLow_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kLow_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
	SkPaint::kLow_FilterLevel); )

	DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kNone_FilterLevel); )
	DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
	DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
	SkPaint::kNone_FilterLevel); )