| /* |
| * 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 "Sample.h" |
| #include "SkBlurMask.h" |
| #include "SkBlurMaskFilter.h" |
| #include "SkCanvas.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkGradientShader.h" |
| #include "SkPaint.h" |
| #include "SkVertices.h" |
| |
| #include "sk_tool_utils.h" |
| |
| #define BG_COLOR 0xFFDDDDDD |
| |
| typedef void (*SlideProc)(SkCanvas*); |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "Sk1DPathEffect.h" |
| #include "Sk2DPathEffect.h" |
| #include "SkCornerPathEffect.h" |
| #include "SkDashPathEffect.h" |
| #include "SkDiscretePathEffect.h" |
| |
| static void compose_pe(SkPaint* paint) { |
| SkPathEffect* pe = paint->getPathEffect(); |
| sk_sp<SkPathEffect> corner = SkCornerPathEffect::Make(25); |
| sk_sp<SkPathEffect> compose; |
| if (pe) { |
| compose = SkPathEffect::MakeCompose(sk_ref_sp(pe), corner); |
| } else { |
| compose = corner; |
| } |
| paint->setPathEffect(compose); |
| } |
| |
| static void hair_pe(SkPaint* paint) { |
| paint->setStrokeWidth(0); |
| } |
| |
| static void hair2_pe(SkPaint* paint) { |
| paint->setStrokeWidth(0); |
| compose_pe(paint); |
| } |
| |
| static void stroke_pe(SkPaint* paint) { |
| paint->setStrokeWidth(12); |
| compose_pe(paint); |
| } |
| |
| static void dash_pe(SkPaint* paint) { |
| SkScalar inter[] = { 20, 10, 10, 10 }; |
| paint->setStrokeWidth(12); |
| paint->setPathEffect(SkDashPathEffect::Make(inter, SK_ARRAY_COUNT(inter), 0)); |
| compose_pe(paint); |
| } |
| |
| static const int gXY[] = { |
| 4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4 |
| }; |
| |
| static void scale(SkPath* path, SkScalar scale) { |
| SkMatrix m; |
| m.setScale(scale, scale); |
| path->transform(m); |
| } |
| |
| static void one_d_pe(SkPaint* paint) { |
| SkPath path; |
| path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1])); |
| for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2) |
| path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1])); |
| path.close(); |
| path.offset(SkIntToScalar(-6), 0); |
| scale(&path, 1.5f); |
| |
| paint->setPathEffect(SkPath1DPathEffect::Make(path, SkIntToScalar(21), 0, |
| SkPath1DPathEffect::kRotate_Style)); |
| compose_pe(paint); |
| } |
| |
| typedef void (*PE_Proc)(SkPaint*); |
| static const PE_Proc gPE[] = { hair_pe, hair2_pe, stroke_pe, dash_pe, one_d_pe }; |
| |
| static void fill_pe(SkPaint* paint) { |
| paint->setStyle(SkPaint::kFill_Style); |
| paint->setPathEffect(nullptr); |
| } |
| |
| static void discrete_pe(SkPaint* paint) { |
| paint->setPathEffect(SkDiscretePathEffect::Make(10, 4)); |
| } |
| |
| static sk_sp<SkPathEffect> MakeTileEffect() { |
| SkMatrix m; |
| m.setScale(SkIntToScalar(12), SkIntToScalar(12)); |
| |
| SkPath path; |
| path.addCircle(0, 0, SkIntToScalar(5)); |
| |
| return SkPath2DPathEffect::Make(m, path); |
| } |
| |
| static void tile_pe(SkPaint* paint) { |
| paint->setPathEffect(MakeTileEffect()); |
| } |
| |
| static const PE_Proc gPE2[] = { fill_pe, discrete_pe, tile_pe }; |
| |
| static void patheffect_slide(SkCanvas* canvas) { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| SkPath path; |
| path.moveTo(20, 20); |
| path.lineTo(70, 120); |
| path.lineTo(120, 30); |
| path.lineTo(170, 80); |
| path.lineTo(240, 50); |
| |
| size_t i; |
| canvas->save(); |
| for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) { |
| gPE[i](&paint); |
| canvas->drawPath(path, paint); |
| canvas->translate(0, 75); |
| } |
| canvas->restore(); |
| |
| path.reset(); |
| SkRect r = { 0, 0, 250, 120 }; |
| path.addOval(r, SkPath::kCW_Direction); |
| r.inset(50, 50); |
| path.addRect(r, SkPath::kCCW_Direction); |
| |
| canvas->translate(320, 20); |
| for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) { |
| gPE2[i](&paint); |
| canvas->drawPath(path, paint); |
| canvas->translate(0, 160); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkGradientShader.h" |
| |
| struct GradData { |
| int fCount; |
| const SkColor* fColors; |
| const SkScalar* fPos; |
| }; |
| |
| static const SkColor gColors[] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK |
| }; |
| static const SkScalar gPos0[] = { 0, SK_Scalar1 }; |
| static const SkScalar gPos1[] = { SK_Scalar1/4, SK_Scalar1*3/4 }; |
| static const SkScalar gPos2[] = { |
| 0, SK_Scalar1/8, SK_Scalar1/2, SK_Scalar1*7/8, SK_Scalar1 |
| }; |
| |
| static const GradData gGradData[] = { |
| { 2, gColors, nullptr }, |
| { 2, gColors, gPos0 }, |
| { 2, gColors, gPos1 }, |
| { 5, gColors, nullptr }, |
| { 5, gColors, gPos2 } |
| }; |
| |
| static sk_sp<SkShader> MakeLinear(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
| return SkGradientShader::MakeLinear(pts, data.fColors, data.fPos, data.fCount, tm); |
| } |
| |
| static sk_sp<SkShader> MakeRadial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
| SkPoint center; |
| center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| SkScalarAve(pts[0].fY, pts[1].fY)); |
| return SkGradientShader::MakeRadial(center, center.fX, data.fColors, |
| data.fPos, data.fCount, tm); |
| } |
| |
| static sk_sp<SkShader> MakeSweep(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
| SkPoint center; |
| center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| SkScalarAve(pts[0].fY, pts[1].fY)); |
| return SkGradientShader::MakeSweep(center.fX, center.fY, data.fColors, data.fPos, data.fCount); |
| } |
| |
| static sk_sp<SkShader> Make2Conical(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
| SkPoint center0, center1; |
| center0.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| SkScalarAve(pts[0].fY, pts[1].fY)); |
| center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5), |
| SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4)); |
| return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7, |
| center0, (pts[1].fX - pts[0].fX) / 2, |
| data.fColors, data.fPos, data.fCount, tm); |
| } |
| |
| typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData&, SkShader::TileMode); |
| static const GradMaker gGradMakers[] = { |
| MakeLinear, MakeRadial, MakeSweep, Make2Conical |
| }; |
| |
| static void gradient_slide(SkCanvas* canvas) { |
| SkPoint pts[2] = { |
| { 0, 0 }, |
| { SkIntToScalar(100), SkIntToScalar(100) } |
| }; |
| SkShader::TileMode tm = SkShader::kClamp_TileMode; |
| SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setDither(true); |
| |
| canvas->translate(SkIntToScalar(20), SkIntToScalar(10)); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) { |
| canvas->save(); |
| for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) { |
| paint.setShader(gGradMakers[j](pts, gGradData[i], tm)); |
| canvas->drawRect(r, paint); |
| canvas->translate(0, SkIntToScalar(120)); |
| } |
| canvas->restore(); |
| canvas->translate(SkIntToScalar(120), 0); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "DecodeFile.h" |
| #include "SkOSFile.h" |
| #include "SkRandom.h" |
| #include "SkStream.h" |
| |
| static sk_sp<SkShader> make_shader0(SkIPoint* size) { |
| SkBitmap bm; |
| |
| decode_file("/skimages/logo.gif", &bm); |
| size->set(bm.width(), bm.height()); |
| return SkShader::MakeBitmapShader(bm, SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode); |
| } |
| |
| static sk_sp<SkShader> make_shader1(const SkIPoint& size) { |
| SkPoint pts[] = { { 0, 0 }, |
| { SkIntToScalar(size.fX), SkIntToScalar(size.fY) } }; |
| SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorRED }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, |
| SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode); |
| } |
| |
| class Rec { |
| public: |
| SkVertices::VertexMode fMode; |
| int fCount; |
| SkPoint* fVerts; |
| SkPoint* fTexs; |
| |
| Rec() : fCount(0), fVerts(nullptr), fTexs(nullptr) {} |
| ~Rec() { delete[] fVerts; delete[] fTexs; } |
| }; |
| |
| static void make_tris(Rec* rec) { |
| int n = 10; |
| SkRandom rand; |
| |
| rec->fMode = SkVertices::kTriangles_VertexMode; |
| rec->fCount = n * 3; |
| rec->fVerts = new SkPoint[rec->fCount]; |
| |
| for (int i = 0; i < n; i++) { |
| SkPoint* v = &rec->fVerts[i*3]; |
| for (int j = 0; j < 3; j++) { |
| v[j].set(rand.nextUScalar1() * 250, rand.nextUScalar1() * 250); |
| } |
| } |
| } |
| |
| static void make_fan(Rec* rec, int texWidth, int texHeight) { |
| const SkScalar tx = SkIntToScalar(texWidth); |
| const SkScalar ty = SkIntToScalar(texHeight); |
| const int n = 24; |
| |
| rec->fMode = SkVertices::kTriangleFan_VertexMode; |
| rec->fCount = n + 2; |
| rec->fVerts = new SkPoint[rec->fCount]; |
| rec->fTexs = new SkPoint[rec->fCount]; |
| |
| SkPoint* v = rec->fVerts; |
| SkPoint* t = rec->fTexs; |
| |
| v[0].set(0, 0); |
| t[0].set(0, 0); |
| for (int i = 0; i < n; i++) { |
| SkScalar cos; |
| SkScalar sin = SkScalarSinCos(SK_ScalarPI * 2 * i / n, &cos); |
| v[i+1].set(cos, sin); |
| t[i+1].set(i*tx/n, ty); |
| } |
| v[n+1] = v[1]; |
| t[n+1].set(tx, ty); |
| |
| SkMatrix m; |
| m.setScale(SkIntToScalar(100), SkIntToScalar(100)); |
| m.postTranslate(SkIntToScalar(110), SkIntToScalar(110)); |
| m.mapPoints(v, rec->fCount); |
| } |
| |
| static void make_strip(Rec* rec, int texWidth, int texHeight) { |
| const SkScalar tx = SkIntToScalar(texWidth); |
| const SkScalar ty = SkIntToScalar(texHeight); |
| const int n = 24; |
| |
| rec->fMode = SkVertices::kTriangleStrip_VertexMode; |
| rec->fCount = 2 * (n + 1); |
| rec->fVerts = new SkPoint[rec->fCount]; |
| rec->fTexs = new SkPoint[rec->fCount]; |
| |
| SkPoint* v = rec->fVerts; |
| SkPoint* t = rec->fTexs; |
| |
| for (int i = 0; i < n; i++) { |
| SkScalar cos; |
| SkScalar sin = SkScalarSinCos(SK_ScalarPI * 2 * i / n, &cos); |
| v[i*2 + 0].set(cos/2, sin/2); |
| v[i*2 + 1].set(cos, sin); |
| |
| t[i*2 + 0].set(tx * i / n, ty); |
| t[i*2 + 1].set(tx * i / n, 0); |
| } |
| v[2*n + 0] = v[0]; |
| v[2*n + 1] = v[1]; |
| |
| t[2*n + 0].set(tx, ty); |
| t[2*n + 1].set(tx, 0); |
| |
| SkMatrix m; |
| m.setScale(SkIntToScalar(100), SkIntToScalar(100)); |
| m.postTranslate(SkIntToScalar(110), SkIntToScalar(110)); |
| m.mapPoints(v, rec->fCount); |
| } |
| |
| static void mesh_slide(SkCanvas* canvas) { |
| Rec fRecs[3]; |
| SkIPoint size; |
| |
| auto fShader0 = make_shader0(&size); |
| auto fShader1 = make_shader1(size); |
| |
| make_strip(&fRecs[0], size.fX, size.fY); |
| make_fan(&fRecs[1], size.fX, size.fY); |
| make_tris(&fRecs[2]); |
| |
| SkPaint paint; |
| paint.setDither(true); |
| paint.setFilterQuality(kLow_SkFilterQuality); |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(fRecs); i++) { |
| auto verts = SkVertices::MakeCopy(fRecs[i].fMode, fRecs[i].fCount, |
| fRecs[i].fVerts, fRecs[i].fTexs, nullptr); |
| canvas->save(); |
| |
| paint.setShader(nullptr); |
| canvas->drawVertices(verts, SkBlendMode::kModulate, paint); |
| |
| canvas->translate(SkIntToScalar(210), 0); |
| |
| paint.setShader(fShader0); |
| canvas->drawVertices(verts, SkBlendMode::kModulate, paint); |
| |
| canvas->translate(SkIntToScalar(210), 0); |
| |
| paint.setShader(fShader1); |
| canvas->drawVertices(verts, SkBlendMode::kModulate, paint); |
| canvas->restore(); |
| |
| canvas->translate(0, SkIntToScalar(250)); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkTypeface.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkImageEncoder.h" |
| |
| static const SlideProc gProc[] = { |
| patheffect_slide, |
| gradient_slide, |
| mesh_slide, |
| }; |
| |
| class SlideView : public Sample { |
| int fIndex; |
| bool fOnce; |
| public: |
| SlideView() { |
| fOnce = false; |
| } |
| |
| void init() { |
| if (fOnce) { |
| return; |
| } |
| fOnce = true; |
| |
| fIndex = 0; |
| |
| SkBitmap bm; |
| bm.allocN32Pixels(1024, 768); |
| SkCanvas canvas(bm); |
| SkScalar s = SkIntToScalar(1024) / 640; |
| canvas.scale(s, s); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); i++) { |
| canvas.save(); |
| canvas.drawColor(BG_COLOR); |
| gProc[i](&canvas); |
| canvas.restore(); |
| SkString str; |
| str.printf("/skimages/slide_" SK_SIZE_T_SPECIFIER ".png", i); |
| sk_tool_utils::EncodeImageToFile(str.c_str(), bm, SkEncodedImageFormat::kPNG, 100); |
| } |
| this->setBGColor(BG_COLOR); |
| } |
| |
| protected: |
| bool onQuery(Sample::Event* evt) override { |
| if (Sample::TitleQ(*evt)) { |
| Sample::TitleR(evt, "Slides"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| this->init(); |
| gProc[fIndex](canvas); |
| } |
| |
| Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override { |
| this->init(); |
| fIndex = (fIndex + 1) % SK_ARRAY_COUNT(gProc); |
| return nullptr; |
| } |
| |
| private: |
| typedef Sample INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new SlideView(); ) |