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Diffstat (limited to 'samplecode/SamplePolyToPoly.cpp')
| -rw-r--r-- | samplecode/SamplePolyToPoly.cpp | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/samplecode/SamplePolyToPoly.cpp b/samplecode/SamplePolyToPoly.cpp new file mode 100644 index 0000000..98e4484 --- /dev/null +++ b/samplecode/SamplePolyToPoly.cpp @@ -0,0 +1,165 @@ +#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 SkView { +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; + bool success; + + success = m1.setPolyToPoly(src, dst, 3); + SkDebugf("--- setPolyToPoly1 %d\n", success); + + 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, SkFloatToScalar(427), SkFloatToScalar(316), SkFloatToScalar(427), SkFloatToScalar(316), 0 + }; + const SkScalar dst1[] = { + SkFloatToScalar(158), SkFloatToScalar(177.5f), SkFloatToScalar(158), SkFloatToScalar(249.5f), + SkFloatToScalar(158), SkFloatToScalar(604.5f), SkFloatToScalar(158), SkFloatToScalar(-177.5f) + }; + + success = m2.setPolyToPoly((const SkPoint*)src1, (SkPoint*)dst1, 4); + SkDebugf("--- setPolyToPoly2 %d\n", success); + + { + 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, m1; + m0.setPolyToPoly(src, dst, 3); + SkSetPoly3To3(&m1, src, dst); + m0.dump(); + m1.dump(); + } + } + } + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SkString str("PolyToPolyView"); + SampleCode::TitleR(evt, str.c_str()); + return true; + } + return this->INHERITED::onQuery(evt); + } + + void drawBG(SkCanvas* canvas) { + canvas->drawColor(SK_ColorWHITE); + } + + 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 onDraw(SkCanvas* canvas) { + this->drawBG(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 SkView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new PolyToPolyView; } +static SkViewRegister reg(MyFactory); + |