1fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 2fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Copyright 2011 Google Inc. 3fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * 4fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Use of this source code is governed by a BSD-style license that can be 5fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * found in the LICENSE file. 6fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 7fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SampleCode.h" 8fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkView.h" 9fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkCanvas.h" 10fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkGradientShader.h" 11fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkPath.h" 12fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkRegion.h" 13fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkShader.h" 14fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkUtils.h" 15fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "Sk1DPathEffect.h" 16fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkCornerPathEffect.h" 17fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkPathMeasure.h" 18fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkRandom.h" 19fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorPriv.h" 20fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorFilter.h" 21fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkDither.h" 22fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "sk_tool_utils.h" 23fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 24fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic void draw_sweep(SkCanvas* c, int width, int height, SkScalar angle) { 25fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkRect r; 26fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkPaint p; 27fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 28fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot p.setAntiAlias(true); 29fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot// p.setDither(true); 30fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot p.setStrokeWidth(SkIntToScalar(width/10)); 31fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot p.setStyle(SkPaint::kStroke_Style); 32fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 33fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r.set(0, 0, SkIntToScalar(width), SkIntToScalar(height)); 34fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 35fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // SkColor colors[] = { SK_ColorRED, SK_ColorBLUE, SK_ColorGREEN, SK_ColorCYAN }; 36fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkColor colors[] = { 0x4c737373, 0x4c737373, 0xffffd300 }; 37fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot p.setShader(SkGradientShader::MakeSweep(r.centerX(), r.centerY(), 38fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot colors, nullptr, SK_ARRAY_COUNT(colors))); 39fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 40fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkAutoCanvasRestore acr(c, true); 41fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot c->rotate(angle, r.centerX(), r.centerY()); 42fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 43fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkRect bounds = r; 44fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r.inset(p.getStrokeWidth(), p.getStrokeWidth()); 45fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkRect innerBounds = r; 46fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 47fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (true) { 48fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot c->drawOval(r, p); 49fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } else { 50fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar x = r.centerX(); 51fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar y = r.centerY(); 52fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar radius = r.width() / 2; 53fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar thickness = p.getStrokeWidth(); 54fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar sweep = 360.0f; 55fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkPath path; 56fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 57fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot path.moveTo(x + radius, y); 58fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // outer top 59fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot path.lineTo(x + radius + thickness, y); 60fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // outer arc 61fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot path.arcTo(bounds, 0, sweep, false); 62fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // inner arc 63fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot path.arcTo(innerBounds, sweep, -sweep, false); 64fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot path.close(); 65fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 66fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 67fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 68fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic void make_bm(SkBitmap* bm) { 69fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bm->allocN32Pixels(100, 100); 70fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bm->eraseColor(SK_ColorTRANSPARENT); 71fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 72fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkCanvas c(*bm); 73fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot draw_sweep(&c, bm->width(), bm->height(), 0); 74fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 75fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 76fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic void pre_dither(const SkBitmap& bm) { 77fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot for (int y = 0; y < bm.height(); y++) { 78fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot DITHER_4444_SCAN(y); 79fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 80fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkPMColor* p = bm.getAddr32(0, y); 81fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot for (int x = 0; x < bm.width(); x++) { 82fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkPMColor c = *p; 83fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 84fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot unsigned a = SkGetPackedA32(c); 85fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot unsigned r = SkGetPackedR32(c); 86fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot unsigned g = SkGetPackedG32(c); 87fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot unsigned b = SkGetPackedB32(c); 88fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 89fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot unsigned d = DITHER_VALUE(x); 90fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 91fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot a = SkDITHER_A32To4444(a, d); 92fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r = SkDITHER_R32To4444(r, d); 93fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot g = SkDITHER_G32To4444(g, d); 94fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot b = SkDITHER_B32To4444(b, d); 95fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 96fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot a = SkA4444ToA32(a); 97fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r = SkR4444ToR32(r); 98fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot g = SkG4444ToG32(g); 99fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot b = SkB4444ToB32(b); 100fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 101fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot *p++ = SkPackARGB32(a, r, g, b); 102fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 103fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 104fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 105fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 106fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotclass DitherView : public SampleView { 107fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotpublic: 108fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkBitmap fBM, fBMPreDither, fBM16; 109fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar fAngle; 110fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 111fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot DitherView() { 112fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot make_bm(&fBM); 113fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot make_bm(&fBMPreDither); 114fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot pre_dither(fBMPreDither); 115fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot sk_tool_utils::copy_to(&fBM16, kARGB_4444_SkColorType, fBM); 116fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 117fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot fAngle = 0; 118fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 119fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot this->setBGColor(0xFF181818); 120fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 121fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 122fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotprotected: 123fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // overrides from SkEventSink 124fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot virtual bool onQuery(SkEvent* evt) { 125fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (SampleCode::TitleQ(*evt)) { 126fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SampleCode::TitleR(evt, "Dither"); 127fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return true; 128fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 129fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return this->INHERITED::onQuery(evt); 130fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 131fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 132fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot virtual void onDrawContent(SkCanvas* canvas) { 133fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkPaint paint; 134fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar x = SkIntToScalar(10); 135fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkScalar y = SkIntToScalar(10); 136fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot const SkScalar DX = SkIntToScalar(fBM.width() + 10); 137fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 138fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot paint.setAntiAlias(true); 139fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 140fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (true) { 141fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->drawBitmap(fBM, x, y, &paint); 142fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot x += DX; 143fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot paint.setDither(true); 144fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->drawBitmap(fBM, x, y, &paint); 145fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 146fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot x += DX; 147fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot paint.setDither(false); 148fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->drawBitmap(fBMPreDither, x, y, &paint); 149fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 150fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot x += DX; 151fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->drawBitmap(fBM16, x, y, &paint); 152fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 153fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 154fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->translate(DX, DX*2); 155fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot draw_sweep(canvas, fBM.width(), fBM.height(), fAngle); 156fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->translate(DX, 0); 157fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot draw_sweep(canvas, fBM.width()>>1, fBM.height()>>1, fAngle); 158fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot canvas->translate(DX, 0); 159fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot draw_sweep(canvas, fBM.width()>>2, fBM.height()>>2, fAngle); 160fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 161fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot fAngle += SK_Scalar1/2; 162fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 163fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 164fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotprivate: 165fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot typedef SampleView INHERITED; 166fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot}; 167fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 168fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot////////////////////////////////////////////////////////////////////////////// 169fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 170fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic SkView* MyFactory() { return new DitherView; } 171fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic SkViewRegister reg(MyFactory); 172