gm/bitmaprect.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 "SkCanvas.h"
 #include "SkGradientShader.h"
 #include "SkGraphics.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkShader.h"

 static void make_bitmap(SkBitmap* bitmap) {
     bitmap->allocN32Pixels(64, 64);

     SkCanvas canvas(*bitmap);

     canvas.drawColor(SK_ColorRED);
     SkPaint paint;
     paint.setAntiAlias(true);
     const SkPoint pts[] = { { 0, 0 }, { 64, 64 } };
     const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
     paint.setShader(SkGradientShader::CreateLinear(pts, colors, NULL, 2,
                                                    SkShader::kClamp_TileMode))->unref();
     canvas.drawCircle(32, 32, 32, paint);
 }

 class DrawBitmapRect2 : public skiagm::GM {
     bool fUseIRect;
 public:
     DrawBitmapRect2(bool useIRect) : fUseIRect(useIRect) {
     }

 protected:
     SkString onShortName() override {
         SkString str;
         str.printf("bitmaprect_%s", fUseIRect ? "i" : "s");
         return str;
     }

     SkISize onISize() override {
         return SkISize::Make(640, 480);
     }

     void onDraw(SkCanvas* canvas) override {
         canvas->drawColor(0xFFCCCCCC);

         const SkIRect src[] = {
             { 0, 0, 32, 32 },
             { 0, 0, 80, 80 },
             { 32, 32, 96, 96 },
             { -32, -32, 32, 32, }
         };

         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);

         SkBitmap bitmap;
         make_bitmap(&bitmap);

         SkRect dstR = { 0, 200, 128, 380 };

         canvas->translate(16, 40);
         for (size_t i = 0; i < SK_ARRAY_COUNT(src); i++) {
             SkRect srcR;
             srcR.set(src[i]);

             canvas->drawBitmap(bitmap, 0, 0, &paint);
             if (!fUseIRect) {
                 canvas->drawBitmapRect(bitmap, &srcR, dstR, &paint,
                                        SkCanvas::kStrict_SrcRectConstraint);
             } else {
                 canvas->drawBitmapRect(bitmap, src[i], dstR, &paint);
             }

             canvas->drawRect(dstR, paint);
             canvas->drawRect(srcR, paint);

             canvas->translate(160, 0);
         }
     }

 private:
     typedef skiagm::GM INHERITED;
 };

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

 static void make_3x3_bitmap(SkBitmap* bitmap) {
     const int xSize = 3;
     const int ySize = 3;

     const SkColor textureData[xSize][ySize] = {
         { SK_ColorRED,    SK_ColorWHITE, SK_ColorBLUE },
         { SK_ColorGREEN,  SK_ColorBLACK, SK_ColorCYAN },
         { SK_ColorYELLOW, SK_ColorGRAY,  SK_ColorMAGENTA }
     };

     bitmap->allocN32Pixels(xSize, ySize, true);
     SkCanvas canvas(*bitmap);
     SkPaint paint;

     for (int y = 0; y < ySize; y++) {
         for (int x = 0; x < xSize; x++) {
             paint.setColor(textureData[x][y]);
             canvas.drawIRect(SkIRect::MakeXYWH(x, y, 1, 1), paint);
         }
     }
 }

 // This GM attempts to make visible any issues drawBitmapRect may have
 // with partial source rects. In this case the eight pixels on the border
 // should be half the width/height of the central pixel, i.e.:
 //                         __|____|__
 //                           |    |
 //                         __|____|__
 //                           |    |
 class DrawBitmapRect3 : public skiagm::GM {
 public:
     DrawBitmapRect3() {
         this->setBGColor(SK_ColorBLACK);
     }

 protected:
     SkString onShortName() override {
         SkString str;
         str.printf("3x3bitmaprect");
         return str;
     }

     SkISize onISize() override {
         return SkISize::Make(640, 480);
     }

     void onDraw(SkCanvas* canvas) override {

         SkBitmap bitmap;
         make_3x3_bitmap(&bitmap);

         SkRect srcR = { 0.5f, 0.5f, 2.5f, 2.5f };
         SkRect dstR = { 100, 100, 300, 200 };

         canvas->drawBitmapRect(bitmap, &srcR, dstR, NULL, SkCanvas::kStrict_SrcRectConstraint);
     }

 private:
     typedef skiagm::GM INHERITED;
 };

 //////////////////////////////////////////////////////////////////////////////
 static void make_big_bitmap(SkBitmap* bitmap) {

     static const int gXSize = 4096;
     static const int gYSize = 4096;
     static const int gBorderWidth = 10;

     bitmap->allocN32Pixels(gXSize, gYSize);
     for (int y = 0; y < gYSize; ++y) {
         for (int x = 0; x < gXSize; ++x) {
             if (x <= gBorderWidth || x >= gXSize-gBorderWidth ||
                 y <= gBorderWidth || y >= gYSize-gBorderWidth) {
                 *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FFFFFF);
             } else {
                 *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FF0000);
             }
         }
     }
 }

 // This GM attempts to reveal any issues we may have when the GPU has to
 // break up a large texture in order to draw it. The XOR transfer mode will
 // create stripes in the image if there is imprecision in the destination
 // tile placement.
 class DrawBitmapRect4 : public skiagm::GM {
     bool fUseIRect;
     SkBitmap fBigBitmap;

 public:
     DrawBitmapRect4(bool useIRect) : fUseIRect(useIRect) {
         this->setBGColor(0x88444444);
     }

 protected:
     SkString onShortName() override {
         SkString str;
         str.printf("bigbitmaprect_%s", fUseIRect ? "i" : "s");
         return str;
     }

     SkISize onISize() override {
         return SkISize::Make(640, 480);
     }

     void onOnceBeforeDraw() override {
         make_big_bitmap(&fBigBitmap);
     }

     void onDraw(SkCanvas* canvas) override {

         SkXfermode* mode = SkXfermode::Create(SkXfermode::kXor_Mode);

         SkPaint paint;
         paint.setAlpha(128);
         paint.setXfermode(mode)->unref();

         SkRect srcR1 = { 0.0f, 0.0f, 4096.0f, 2040.0f };
         SkRect dstR1 = { 10.1f, 10.1f, 629.9f, 400.9f };

         SkRect srcR2 = { 4085.0f, 10.0f, 4087.0f, 12.0f };
         SkRect dstR2 = { 10, 410, 30, 430 };

         if (!fUseIRect) {
             canvas->drawBitmapRect(fBigBitmap, &srcR1, dstR1, &paint,
                                    SkCanvas::kStrict_SrcRectConstraint);
             canvas->drawBitmapRect(fBigBitmap, &srcR2, dstR2, &paint,
                                    SkCanvas::kStrict_SrcRectConstraint);
         } else {
             canvas->drawBitmapRect(fBigBitmap, srcR1.roundOut(), dstR1, &paint);
             canvas->drawBitmapRect(fBigBitmap, srcR2.roundOut(), dstR2, &paint);
         }
     }

 private:
     typedef skiagm::GM INHERITED;
 };

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

 public:
     BitmapRectRounding() {}

 protected:
     SkString onShortName() override {
         SkString str;
         str.printf("bitmaprect_rounding");
         return str;
     }

     SkISize onISize() override {
         return SkISize::Make(640, 480);
     }

     void onOnceBeforeDraw() override {
         fBM.allocN32Pixels(10, 10);
         fBM.eraseColor(SK_ColorBLUE);
     }

     // This choice of coordinates and matrix land the bottom edge of the clip (and bitmap dst)
     // at exactly 1/2 pixel boundary. However, drawBitmapRect may lose precision along the way.
     // If it does, we may see a red-line at the bottom, instead of the bitmap exactly matching
     // the clip (in which case we should see all blue).
     // The correct image should be all blue.
     void onDraw(SkCanvas* canvas) override {
         SkPaint paint;
         paint.setColor(SK_ColorRED);

         const SkRect r = SkRect::MakeXYWH(1, 1, 110, 114);
         canvas->scale(0.9f, 0.9f);

         // the drawRect shows the same problem as clipRect(r) followed by drawcolor(red)
         canvas->drawRect(r, paint);
         canvas->drawBitmapRect(fBM, NULL, r, NULL);
     }

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

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

 static skiagm::GM* MyFactory0(void*) { return new DrawBitmapRect2(false); }
 static skiagm::GM* MyFactory1(void*) { return new DrawBitmapRect2(true); }

 static skiagm::GM* MyFactory2(void*) { return new DrawBitmapRect3(); }

 #ifndef SK_BUILD_FOR_ANDROID
 static skiagm::GM* MyFactory3(void*) { return new DrawBitmapRect4(false); }
 static skiagm::GM* MyFactory4(void*) { return new DrawBitmapRect4(true); }
 #endif

 static skiagm::GMRegistry reg0(MyFactory0);
 static skiagm::GMRegistry reg1(MyFactory1);

 static skiagm::GMRegistry reg2(MyFactory2);

 #ifndef SK_BUILD_FOR_ANDROID
 static skiagm::GMRegistry reg3(MyFactory3);
 static skiagm::GMRegistry reg4(MyFactory4);
 #endif

	/*
	* 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 "SkCanvas.h"
	#include "SkGradientShader.h"
	#include "SkGraphics.h"
	#include "SkPath.h"
	#include "SkRegion.h"
	#include "SkShader.h"

	static void make_bitmap(SkBitmap* bitmap) {
	bitmap->allocN32Pixels(64, 64);

	SkCanvas canvas(*bitmap);

	canvas.drawColor(SK_ColorRED);
	SkPaint paint;
	paint.setAntiAlias(true);
	const SkPoint pts[] = { { 0, 0 }, { 64, 64 } };
	const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
	paint.setShader(SkGradientShader::CreateLinear(pts, colors, NULL, 2,
	SkShader::kClamp_TileMode))->unref();
	canvas.drawCircle(32, 32, 32, paint);
	}

	class DrawBitmapRect2 : public skiagm::GM {
	bool fUseIRect;
	public:
	DrawBitmapRect2(bool useIRect) : fUseIRect(useIRect) {
	}

	protected:
	SkString onShortName() override {
	SkString str;
	str.printf("bitmaprect_%s", fUseIRect ? "i" : "s");
	return str;
	}

	SkISize onISize() override {
	return SkISize::Make(640, 480);
	}

	void onDraw(SkCanvas* canvas) override {
	canvas->drawColor(0xFFCCCCCC);

	const SkIRect src[] = {
	{ 0, 0, 32, 32 },
	{ 0, 0, 80, 80 },
	{ 32, 32, 96, 96 },
	{ -32, -32, 32, 32, }
	};

	SkPaint paint;
	paint.setStyle(SkPaint::kStroke_Style);

	SkBitmap bitmap;
	make_bitmap(&bitmap);

	SkRect dstR = { 0, 200, 128, 380 };

	canvas->translate(16, 40);
	for (size_t i = 0; i < SK_ARRAY_COUNT(src); i++) {
	SkRect srcR;
	srcR.set(src[i]);

	canvas->drawBitmap(bitmap, 0, 0, &paint);
	if (!fUseIRect) {
	canvas->drawBitmapRect(bitmap, &srcR, dstR, &paint,
	SkCanvas::kStrict_SrcRectConstraint);
	} else {
	canvas->drawBitmapRect(bitmap, src[i], dstR, &paint);
	}

	canvas->drawRect(dstR, paint);
	canvas->drawRect(srcR, paint);

	canvas->translate(160, 0);
	}
	}

	private:
	typedef skiagm::GM INHERITED;
	};

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

	static void make_3x3_bitmap(SkBitmap* bitmap) {
	const int xSize = 3;
	const int ySize = 3;

	const SkColor textureData[xSize][ySize] = {
	{ SK_ColorRED, SK_ColorWHITE, SK_ColorBLUE },
	{ SK_ColorGREEN, SK_ColorBLACK, SK_ColorCYAN },
	{ SK_ColorYELLOW, SK_ColorGRAY, SK_ColorMAGENTA }
	};

	bitmap->allocN32Pixels(xSize, ySize, true);
	SkCanvas canvas(*bitmap);
	SkPaint paint;

	for (int y = 0; y < ySize; y++) {
	for (int x = 0; x < xSize; x++) {
	paint.setColor(textureData[x][y]);
	canvas.drawIRect(SkIRect::MakeXYWH(x, y, 1, 1), paint);
	}
	}
	}

	// This GM attempts to make visible any issues drawBitmapRect may have
	// with partial source rects. In this case the eight pixels on the border
	// should be half the width/height of the central pixel, i.e.:
	// __\|____\|__
	// \| \|
	// __\|____\|__
	// \| \|
	class DrawBitmapRect3 : public skiagm::GM {
	public:
	DrawBitmapRect3() {
	this->setBGColor(SK_ColorBLACK);
	}

	protected:
	SkString onShortName() override {
	SkString str;
	str.printf("3x3bitmaprect");
	return str;
	}

	SkISize onISize() override {
	return SkISize::Make(640, 480);
	}

	void onDraw(SkCanvas* canvas) override {

	SkBitmap bitmap;
	make_3x3_bitmap(&bitmap);

	SkRect srcR = { 0.5f, 0.5f, 2.5f, 2.5f };
	SkRect dstR = { 100, 100, 300, 200 };

	canvas->drawBitmapRect(bitmap, &srcR, dstR, NULL, SkCanvas::kStrict_SrcRectConstraint);
	}

	private:
	typedef skiagm::GM INHERITED;
	};

	//////////////////////////////////////////////////////////////////////////////
	static void make_big_bitmap(SkBitmap* bitmap) {

	static const int gXSize = 4096;
	static const int gYSize = 4096;
	static const int gBorderWidth = 10;

	bitmap->allocN32Pixels(gXSize, gYSize);
	for (int y = 0; y < gYSize; ++y) {
	for (int x = 0; x < gXSize; ++x) {
	if (x <= gBorderWidth \|\| x >= gXSize-gBorderWidth \|\|
	y <= gBorderWidth \|\| y >= gYSize-gBorderWidth) {
	*bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FFFFFF);
	} else {
	*bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FF0000);
	}
	}
	}
	}

	// This GM attempts to reveal any issues we may have when the GPU has to
	// break up a large texture in order to draw it. The XOR transfer mode will
	// create stripes in the image if there is imprecision in the destination
	// tile placement.
	class DrawBitmapRect4 : public skiagm::GM {
	bool fUseIRect;
	SkBitmap fBigBitmap;

	public:
	DrawBitmapRect4(bool useIRect) : fUseIRect(useIRect) {
	this->setBGColor(0x88444444);
	}

	protected:
	SkString onShortName() override {
	SkString str;
	str.printf("bigbitmaprect_%s", fUseIRect ? "i" : "s");
	return str;
	}

	SkISize onISize() override {
	return SkISize::Make(640, 480);
	}

	void onOnceBeforeDraw() override {
	make_big_bitmap(&fBigBitmap);
	}

	void onDraw(SkCanvas* canvas) override {

	SkXfermode* mode = SkXfermode::Create(SkXfermode::kXor_Mode);

	SkPaint paint;
	paint.setAlpha(128);
	paint.setXfermode(mode)->unref();

	SkRect srcR1 = { 0.0f, 0.0f, 4096.0f, 2040.0f };
	SkRect dstR1 = { 10.1f, 10.1f, 629.9f, 400.9f };

	SkRect srcR2 = { 4085.0f, 10.0f, 4087.0f, 12.0f };
	SkRect dstR2 = { 10, 410, 30, 430 };

	if (!fUseIRect) {
	canvas->drawBitmapRect(fBigBitmap, &srcR1, dstR1, &paint,
	SkCanvas::kStrict_SrcRectConstraint);
	canvas->drawBitmapRect(fBigBitmap, &srcR2, dstR2, &paint,
	SkCanvas::kStrict_SrcRectConstraint);
	} else {
	canvas->drawBitmapRect(fBigBitmap, srcR1.roundOut(), dstR1, &paint);
	canvas->drawBitmapRect(fBigBitmap, srcR2.roundOut(), dstR2, &paint);
	}
	}

	private:
	typedef skiagm::GM INHERITED;
	};

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

	public:
	BitmapRectRounding() {}

	protected:
	SkString onShortName() override {
	SkString str;
	str.printf("bitmaprect_rounding");
	return str;
	}

	SkISize onISize() override {
	return SkISize::Make(640, 480);
	}

	void onOnceBeforeDraw() override {
	fBM.allocN32Pixels(10, 10);
	fBM.eraseColor(SK_ColorBLUE);
	}

	// This choice of coordinates and matrix land the bottom edge of the clip (and bitmap dst)
	// at exactly 1/2 pixel boundary. However, drawBitmapRect may lose precision along the way.
	// If it does, we may see a red-line at the bottom, instead of the bitmap exactly matching
	// the clip (in which case we should see all blue).
	// The correct image should be all blue.
	void onDraw(SkCanvas* canvas) override {
	SkPaint paint;
	paint.setColor(SK_ColorRED);

	const SkRect r = SkRect::MakeXYWH(1, 1, 110, 114);
	canvas->scale(0.9f, 0.9f);

	// the drawRect shows the same problem as clipRect(r) followed by drawcolor(red)
	canvas->drawRect(r, paint);
	canvas->drawBitmapRect(fBM, NULL, r, NULL);
	}

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

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

	static skiagm::GM* MyFactory0(void*) { return new DrawBitmapRect2(false); }
	static skiagm::GM* MyFactory1(void*) { return new DrawBitmapRect2(true); }

	static skiagm::GM* MyFactory2(void*) { return new DrawBitmapRect3(); }

	#ifndef SK_BUILD_FOR_ANDROID
	static skiagm::GM* MyFactory3(void*) { return new DrawBitmapRect4(false); }
	static skiagm::GM* MyFactory4(void*) { return new DrawBitmapRect4(true); }
	#endif

	static skiagm::GMRegistry reg0(MyFactory0);
	static skiagm::GMRegistry reg1(MyFactory1);

	static skiagm::GMRegistry reg2(MyFactory2);

	#ifndef SK_BUILD_FOR_ANDROID
	static skiagm::GMRegistry reg3(MyFactory3);
	static skiagm::GMRegistry reg4(MyFactory4);
	#endif