diff options
Diffstat (limited to 'chromium/third_party/skia/samplecode/SamplePolyToPoly.cpp')
| -rw-r--r-- | chromium/third_party/skia/samplecode/SamplePolyToPoly.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SamplePolyToPoly.cpp b/chromium/third_party/skia/samplecode/SamplePolyToPoly.cpp new file mode 100644 index 00000000000..1283a23bc57 --- /dev/null +++ b/chromium/third_party/skia/samplecode/SamplePolyToPoly.cpp @@ -0,0 +1,168 @@ + +/* + * 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 "SkGraphics.h" +#include "SkPath.h" +#include "SkRandom.h" +#include "SkTime.h" + +extern bool SkSetPoly3To3(SkMatrix* matrix, const SkPoint src[3], const SkPoint dst[3]); + +class PolyToPolyView : public SampleView { +public: + PolyToPolyView() { + // tests + { + SkPoint src[] = { { 0, 0 }, + { SK_Scalar1, 0 }, + { 0, SK_Scalar1 } }; + SkPoint dst[] = { { 0, 0 }, + { 2*SK_Scalar1, 0 }, + { 0, 2*SK_Scalar1 } }; + SkMatrix m1, m2; + + (void) m1.setPolyToPoly(src, dst, 3); + + m2.reset(); + m2.set(SkMatrix::kMScaleX, dst[1].fX - dst[0].fX); + m2.set(SkMatrix::kMSkewX, dst[2].fX - dst[0].fX); + m2.set(SkMatrix::kMTransX, dst[0].fX); + m2.set(SkMatrix::kMSkewY, dst[1].fY - dst[0].fY); + m2.set(SkMatrix::kMScaleY, dst[2].fY - dst[0].fY); + m2.set(SkMatrix::kMTransY, dst[0].fY); + + m1.reset(); + + const SkScalar src1[] = { + 0, 0, 0, 427, 316, 427, 316, 0 + }; + const SkScalar dst1[] = { + 158, 177.5f, 158, 249.5f, + 158, 604.5f, 158, -177.5f + }; + + (void) m2.setPolyToPoly((const SkPoint*)src1, (SkPoint*)dst1, 4); + + { + const SkPoint src[] = { + { SkIntToScalar(1), SkIntToScalar(0) }, + { SkIntToScalar(4), SkIntToScalar(7) }, + { SkIntToScalar(10), SkIntToScalar(2) } + }; + const SkPoint dst[] = { + { SkIntToScalar(4), SkIntToScalar(2) }, + { SkIntToScalar(45), SkIntToScalar(26) }, + { SkIntToScalar(32), SkIntToScalar(17) } + }; + + SkMatrix m0; + m0.setPolyToPoly(src, dst, 3); + // SkMatrix m1; + // SkSetPoly3To3(&m1, src, dst); + // m0.dump(); + // m1.dump(); + } + } + } + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "PolyToPolyView"); + return true; + } + return this->INHERITED::onQuery(evt); + } + + static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[], + const int idst[], int count) { + SkMatrix matrix; + SkPoint src[4], dst[4]; + + for (int i = 0; i < count; i++) { + src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1])); + dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1])); + } + + canvas->save(); + matrix.setPolyToPoly(src, dst, count); + canvas->concat(matrix); + + paint->setColor(SK_ColorGRAY); + paint->setStyle(SkPaint::kStroke_Style); + const SkScalar D = SkIntToScalar(64); + canvas->drawRectCoords(0, 0, D, D, *paint); + canvas->drawLine(0, 0, D, D, *paint); + canvas->drawLine(0, D, D, 0, *paint); + + SkPaint::FontMetrics fm; + paint->getFontMetrics(&fm); + paint->setColor(SK_ColorRED); + paint->setStyle(SkPaint::kFill_Style); + SkScalar x = D/2; + float y = D/2 - (fm.fAscent + fm.fDescent)/2; + SkString str; + str.appendS32(count); + canvas->drawText(str.c_str(), str.size(), + x, y, + *paint); + + canvas->restore(); + } + + virtual void onDrawContent(SkCanvas* canvas) { + SkPaint paint; + paint.setAntiAlias(true); + paint.setStrokeWidth(SkIntToScalar(4)); + paint.setTextSize(SkIntToScalar(40)); + paint.setTextAlign(SkPaint::kCenter_Align); + + canvas->save(); + canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); + // translate (1 point) + const int src1[] = { 0, 0 }; + const int dst1[] = { 5, 5 }; + doDraw(canvas, &paint, src1, dst1, 1); + canvas->restore(); + + canvas->save(); + canvas->translate(SkIntToScalar(160), SkIntToScalar(10)); + // rotate/uniform-scale (2 points) + const int src2[] = { 32, 32, 64, 32 }; + const int dst2[] = { 32, 32, 64, 48 }; + doDraw(canvas, &paint, src2, dst2, 2); + canvas->restore(); + + canvas->save(); + canvas->translate(SkIntToScalar(10), SkIntToScalar(110)); + // rotate/skew (3 points) + const int src3[] = { 0, 0, 64, 0, 0, 64 }; + const int dst3[] = { 0, 0, 96, 0, 24, 64 }; + doDraw(canvas, &paint, src3, dst3, 3); + canvas->restore(); + + canvas->save(); + canvas->translate(SkIntToScalar(160), SkIntToScalar(110)); + // perspective (4 points) + const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 }; + const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 }; + doDraw(canvas, &paint, src4, dst4, 4); + canvas->restore(); + } + +private: + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new PolyToPolyView; } +static SkViewRegister reg(MyFactory); |