| |
| /* |
| * 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 "SkView.h" |
| #include "SkCanvas.h" |
| #include "SkGradientShader.h" |
| #include "SkGraphics.h" |
| #include "SkImageDecoder.h" |
| #include "SkPath.h" |
| #include "SkRandom.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" |
| |
| static sk_sp<SkShader> make_shader0(SkIPoint* size) { |
| SkBitmap bm; |
| size->set(2, 2); |
| SkPMColor color0 = SkPreMultiplyARGB(0x80, 0x80, 0xff, 0x80); |
| SkPMColor color1 = SkPreMultiplyARGB(0x40, 0xff, 0x00, 0xff); |
| bm.allocN32Pixels(size->fX, size->fY); |
| bm.eraseColor(color0); |
| bm.lockPixels(); |
| uint32_t* pixels = (uint32_t*) bm.getPixels(); |
| pixels[0] = pixels[2] = color0; |
| pixels[1] = pixels[3] = color1; |
| bm.unlockPixels(); |
| |
| return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_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 VerticesView : public SampleView { |
| sk_sp<SkShader> fShader0; |
| sk_sp<SkShader> fShader1; |
| |
| public: |
| VerticesView() { |
| SkIPoint size; |
| |
| fShader0 = make_shader0(&size); |
| fShader1 = make_shader1(size); |
| |
| make_strip(&fRecs[0], size.fX, size.fY); |
| make_fan(&fRecs[1], size.fX, size.fY); |
| make_tris(&fRecs[2]); |
| |
| fScale = SK_Scalar1; |
| |
| this->setBGColor(SK_ColorGRAY); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| bool onQuery(SkEvent* evt) override { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "Vertices"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| SkScalar fScale; |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| SkPaint paint; |
| paint.setDither(true); |
| paint.setFilterQuality(kLow_SkFilterQuality); |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(fRecs); i++) { |
| canvas->save(); |
| |
| paint.setShader(nullptr); |
| canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount, |
| fRecs[i].fVerts, fRecs[i].fTexs, |
| nullptr, nullptr, nullptr, 0, paint); |
| |
| canvas->translate(SkIntToScalar(250), 0); |
| |
| paint.setShader(fShader0); |
| canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount, |
| fRecs[i].fVerts, fRecs[i].fTexs, |
| nullptr, nullptr, nullptr, 0, paint); |
| |
| canvas->translate(SkIntToScalar(250), 0); |
| |
| paint.setShader(fShader1); |
| canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount, |
| fRecs[i].fVerts, fRecs[i].fTexs, |
| nullptr, nullptr, nullptr, 0, paint); |
| canvas->restore(); |
| |
| canvas->translate(0, SkIntToScalar(250)); |
| } |
| } |
| |
| SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override { |
| return new Click(this); |
| } |
| |
| bool onClick(Click* click) override { |
| // fCurrX = click->fICurr.fX; |
| // fCurrY = click->fICurr.fY; |
| this->inval(nullptr); |
| return true; |
| } |
| |
| private: |
| struct Rec { |
| SkCanvas::VertexMode fMode; |
| int fCount; |
| SkPoint* fVerts; |
| SkPoint* fTexs; |
| |
| Rec() : fCount(0), fVerts(nullptr), fTexs(nullptr) {} |
| ~Rec() { delete[] fVerts; delete[] fTexs; } |
| }; |
| |
| void make_tris(Rec* rec) { |
| int n = 10; |
| SkRandom rand; |
| |
| rec->fMode = SkCanvas::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); |
| } |
| } |
| } |
| |
| 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 = SkCanvas::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); |
| } |
| |
| 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 = SkCanvas::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); |
| } |
| |
| Rec fRecs[3]; |
| |
| typedef SampleView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new VerticesView; } |
| static SkViewRegister reg(MyFactory); |