/* * 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 "SampleCode.h" #include "SkAnimTimer.h" #include "SkView.h" #include "SkCanvas.h" #include "SkGradientShader.h" #include "SkGraphics.h" #include "SkImageDecoder.h" #include "SkPath.h" #include "SkRegion.h" #include "SkShader.h" #include "SkUtils.h" #include "SkXfermode.h" #include "SkColorPriv.h" #include "SkColorFilter.h" #include "SkTime.h" #include "SkTypeface.h" #include "SkOSFile.h" #include "SkStream.h" #define INT_SIZE 64 #define SCALAR_SIZE SkIntToScalar(INT_SIZE) static void make_bitmap(SkBitmap* bitmap) { bitmap->allocN32Pixels(INT_SIZE, INT_SIZE); SkCanvas canvas(*bitmap); canvas.drawColor(SK_ColorRED); SkPaint paint; paint.setAntiAlias(true); const SkPoint pts[] = { { 0, 0 }, { SCALAR_SIZE, SCALAR_SIZE } }; const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE }; paint.setShader(SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode))->unref(); canvas.drawCircle(SCALAR_SIZE/2, SCALAR_SIZE/2, SCALAR_SIZE/2, paint); } static SkPoint unit_vec(int degrees) { SkScalar rad = SkDegreesToRadians(SkIntToScalar(degrees)); SkScalar s, c; s = SkScalarSinCos(rad, &c); return SkPoint::Make(c, s); } static void bounce(SkScalar* value, SkScalar* delta, SkScalar min, SkScalar max) { *value += *delta; if (*value < min) { *value = min; *delta = - *delta; } else if (*value > max) { *value = max; *delta = - *delta; } } static void bounce_pt(SkPoint* pt, SkVector* vec, const SkRect& limit) { bounce(&pt->fX, &vec->fX, limit.fLeft, limit.fRight); bounce(&pt->fY, &vec->fY, limit.fTop, limit.fBottom); } class BitmapRectView : public SampleView { SkPoint fSrcPts[2]; SkPoint fSrcVec[2]; SkRect fSrcLimit; SkRect fDstR[2]; void bounce() { bounce_pt(&fSrcPts[0], &fSrcVec[0], fSrcLimit); bounce_pt(&fSrcPts[1], &fSrcVec[1], fSrcLimit); } void resetBounce() { fSrcPts[0].set(0, 0); fSrcPts[1].set(SCALAR_SIZE, SCALAR_SIZE); fSrcVec[0] = unit_vec(30); fSrcVec[1] = unit_vec(107); } public: BitmapRectView() { this->setBGColor(SK_ColorGRAY); this->resetBounce(); fSrcLimit.set(-SCALAR_SIZE/4, -SCALAR_SIZE/4, SCALAR_SIZE*5/4, SCALAR_SIZE*5/4); fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(100), SkIntToScalar(250), SkIntToScalar(300)); fDstR[1] = fDstR[0]; fDstR[1].offset(fDstR[0].width() * 5/4, 0); fSrcPts[0].set(32, 32); fSrcPts[1].set(90, 90); } protected: bool onQuery(SkEvent* evt) SK_OVERRIDE { if (SampleCode::TitleQ(*evt)) { SampleCode::TitleR(evt, "BitmapRect"); return true; } return this->INHERITED::onQuery(evt); } void onDrawContent(SkCanvas* canvas) SK_OVERRIDE { SkRect srcR; srcR.set(fSrcPts[0], fSrcPts[1]); srcR = SkRect::MakeXYWH(fSrcPts[0].fX, fSrcPts[0].fY, 32, 32); srcR.offset(-srcR.width()/2, -srcR.height()/2); SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setColor(SK_ColorYELLOW); SkBitmap bitmap; make_bitmap(&bitmap); canvas->translate(20, 20); canvas->drawBitmap(bitmap, 0, 0, &paint); canvas->drawRect(srcR, paint); for (int i = 0; i < 2; ++i) { paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel); canvas->drawBitmapRectToRect(bitmap, &srcR, fDstR[i], &paint); canvas->drawRect(fDstR[i], paint); } } bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE { if (timer.isStopped()) { this->resetBounce(); } else if (timer.isRunning()) { this->bounce(); } return true; } private: typedef SampleView INHERITED; }; ////////////////////////////////////////////////////////////////////////////// static void make_big_bitmap(SkBitmap* bm) { static const char gText[] = "We the people, in order to form a more perfect union, establish justice," " ensure domestic tranquility, provide for the common defense, promote the" " general welfare and ensure the blessings of liberty to ourselves and our" " posterity, do ordain and establish this constitution for the United" " States of America."; const int BIG_H = 120; SkPaint paint; paint.setAntiAlias(true); paint.setTextSize(SkIntToScalar(BIG_H)); const int BIG_W = SkScalarRoundToInt(paint.measureText(gText, strlen(gText))); bm->allocN32Pixels(BIG_W, BIG_H); bm->eraseColor(SK_ColorWHITE); SkCanvas canvas(*bm); canvas.drawText(gText, strlen(gText), 0, paint.getTextSize()*4/5, paint); } class BitmapRectView2 : public SampleView { SkBitmap fBitmap; SkRect fSrcR; SkRect fLimitR; SkScalar fDX; SkRect fDstR[2]; void bounceMe() { SkScalar width = fSrcR.width(); bounce(&fSrcR.fLeft, &fDX, fLimitR.fLeft, fLimitR.fRight - width); fSrcR.fRight = fSrcR.fLeft + width; } void resetBounce() { fSrcR.iset(0, 0, fBitmap.height() * 3, fBitmap.height()); fDX = SK_Scalar1; } public: BitmapRectView2() { make_big_bitmap(&fBitmap); this->setBGColor(SK_ColorGRAY); this->resetBounce(); fLimitR.iset(0, 0, fBitmap.width(), fBitmap.height()); fDstR[0] = SkRect::MakeXYWH(20, 20, 600, 200); fDstR[1] = fDstR[0]; fDstR[1].offset(0, fDstR[0].height() * 5/4); } protected: bool onQuery(SkEvent* evt) SK_OVERRIDE { if (SampleCode::TitleQ(*evt)) { SampleCode::TitleR(evt, "BigBitmapRect"); return true; } return this->INHERITED::onQuery(evt); } void onDrawContent(SkCanvas* canvas) SK_OVERRIDE { SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setColor(SK_ColorYELLOW); for (int i = 0; i < 2; ++i) { paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel); canvas->drawBitmapRectToRect(fBitmap, &fSrcR, fDstR[i], &paint); canvas->drawRect(fDstR[i], paint); } } bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE { if (timer.isStopped()) { this->resetBounce(); } else if (timer.isRunning()) { this->bounceMe(); } return true; } private: typedef SampleView INHERITED; }; ////////////////////////////////////////////////////////////////////////////// static SkView* F0() { return new BitmapRectView; } static SkView* F1() { return new BitmapRectView2; } static SkViewRegister gR0(F0); static SkViewRegister gR1(F1);