2011-07-28 14:26:00 +00:00
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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2008-12-17 15:59:43 +00:00
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#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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#include "SkTime.h"
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extern bool SkSetPoly3To3(SkMatrix* matrix, const SkPoint src[3], const SkPoint dst[3]);
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2011-05-11 05:58:58 +00:00
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class PolyToPolyView : public SampleView {
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2011-02-17 14:21:01 +00:00
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public:
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2008-12-17 15:59:43 +00:00
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PolyToPolyView() {
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// tests
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{
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2011-05-19 19:58:58 +00:00
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SkPoint src[] = { { 0, 0 },
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{ SK_Scalar1, 0 },
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{ 0, SK_Scalar1 } };
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SkPoint dst[] = { { 0, 0 },
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{ 2*SK_Scalar1, 0 },
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{ 0, 2*SK_Scalar1 } };
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2008-12-17 15:59:43 +00:00
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SkMatrix m1, m2;
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bool success;
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2008-12-17 15:59:43 +00:00
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success = m1.setPolyToPoly(src, dst, 3);
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2011-02-17 14:21:01 +00:00
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m2.reset();
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2008-12-17 15:59:43 +00:00
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m2.set(SkMatrix::kMScaleX, dst[1].fX - dst[0].fX);
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m2.set(SkMatrix::kMSkewX, dst[2].fX - dst[0].fX);
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m2.set(SkMatrix::kMTransX, dst[0].fX);
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m2.set(SkMatrix::kMSkewY, dst[1].fY - dst[0].fY);
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m2.set(SkMatrix::kMScaleY, dst[2].fY - dst[0].fY);
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m2.set(SkMatrix::kMTransY, dst[0].fY);
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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m1.reset();
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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const SkScalar src1[] = {
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0, 0, 0, SkFloatToScalar(427), SkFloatToScalar(316), SkFloatToScalar(427), SkFloatToScalar(316), 0
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};
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const SkScalar dst1[] = {
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SkFloatToScalar(158), SkFloatToScalar(177.5f), SkFloatToScalar(158), SkFloatToScalar(249.5f),
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SkFloatToScalar(158), SkFloatToScalar(604.5f), SkFloatToScalar(158), SkFloatToScalar(-177.5f)
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};
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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success = m2.setPolyToPoly((const SkPoint*)src1, (SkPoint*)dst1, 4);
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2008-12-17 15:59:43 +00:00
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{
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const SkPoint src[] = {
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{ SkIntToScalar(1), SkIntToScalar(0) },
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{ SkIntToScalar(4), SkIntToScalar(7) },
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{ SkIntToScalar(10), SkIntToScalar(2) }
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};
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const SkPoint dst[] = {
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{ SkIntToScalar(4), SkIntToScalar(2) },
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{ SkIntToScalar(45), SkIntToScalar(26) },
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{ SkIntToScalar(32), SkIntToScalar(17) }
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};
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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SkMatrix m0, m1;
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m0.setPolyToPoly(src, dst, 3);
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2011-02-17 14:21:01 +00:00
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// SkSetPoly3To3(&m1, src, dst);
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2011-05-02 17:33:45 +00:00
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// m0.dump();
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// m1.dump();
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}
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}
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}
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SkString str("PolyToPolyView");
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SampleCode::TitleR(evt, str.c_str());
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
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const int idst[], int count) {
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SkMatrix matrix;
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SkPoint src[4], dst[4];
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2008-12-17 15:59:43 +00:00
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for (int i = 0; i < count; i++) {
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src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
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dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
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}
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2008-12-17 15:59:43 +00:00
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canvas->save();
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matrix.setPolyToPoly(src, dst, count);
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canvas->concat(matrix);
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paint->setColor(SK_ColorGRAY);
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paint->setStyle(SkPaint::kStroke_Style);
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const SkScalar D = SkIntToScalar(64);
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canvas->drawRectCoords(0, 0, D, D, *paint);
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canvas->drawLine(0, 0, D, D, *paint);
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canvas->drawLine(0, D, D, 0, *paint);
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SkPaint::FontMetrics fm;
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paint->getFontMetrics(&fm);
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paint->setColor(SK_ColorRED);
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paint->setStyle(SkPaint::kFill_Style);
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SkScalar x = D/2;
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float y = D/2 - (fm.fAscent + fm.fDescent)/2;
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SkString str;
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str.appendS32(count);
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canvas->drawText(str.c_str(), str.size(), x, y, *paint);
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2008-12-17 15:59:43 +00:00
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canvas->restore();
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}
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2011-02-17 14:21:01 +00:00
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2011-05-11 05:58:58 +00:00
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virtual void onDrawContent(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStrokeWidth(SkIntToScalar(4));
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paint.setTextSize(SkIntToScalar(40));
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paint.setTextAlign(SkPaint::kCenter_Align);
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canvas->save();
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canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
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// translate (1 point)
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const int src1[] = { 0, 0 };
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const int dst1[] = { 5, 5 };
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doDraw(canvas, &paint, src1, dst1, 1);
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canvas->restore();
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2008-12-17 15:59:43 +00:00
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canvas->save();
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canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
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// rotate/uniform-scale (2 points)
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const int src2[] = { 32, 32, 64, 32 };
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const int dst2[] = { 32, 32, 64, 48 };
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doDraw(canvas, &paint, src2, dst2, 2);
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canvas->restore();
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canvas->save();
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canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
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// rotate/skew (3 points)
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const int src3[] = { 0, 0, 64, 0, 0, 64 };
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const int dst3[] = { 0, 0, 96, 0, 24, 64 };
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doDraw(canvas, &paint, src3, dst3, 3);
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canvas->restore();
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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canvas->save();
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canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
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// perspective (4 points)
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const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
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const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
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doDraw(canvas, &paint, src4, dst4, 4);
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canvas->restore();
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}
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2011-02-17 14:21:01 +00:00
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2008-12-17 15:59:43 +00:00
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private:
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2011-05-11 05:58:58 +00:00
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new PolyToPolyView; }
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static SkViewRegister reg(MyFactory);
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