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- /*
- * 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 "include/core/SkCanvas.h"
- #include "include/core/SkFontMetrics.h"
- #include "include/core/SkGraphics.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTime.h"
- #include "include/utils/SkRandom.h"
- #include "include/utils/SkTextUtils.h"
- #include "samplecode/Sample.h"
- class PolyToPolyView : public Sample {
- 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);
- }
- }
- }
- protected:
- virtual SkString name() { return SkString("PolyToPolyView"); }
- static void doDraw(SkCanvas* canvas, SkPaint* paint, const SkFont& font, 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->drawRect(SkRect::MakeWH(D, D), *paint);
- canvas->drawLine(0, 0, D, D, *paint);
- canvas->drawLine(0, D, D, 0, *paint);
- SkFontMetrics fm;
- font.getMetrics(&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);
- SkTextUtils::DrawString(canvas, str.c_str(), x, y, font, *paint, SkTextUtils::kCenter_Align);
- canvas->restore();
- }
- virtual void onDrawContent(SkCanvas* canvas) {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStrokeWidth(SkIntToScalar(4));
- SkFont font;
- font.setSize(40);
- canvas->save();
- canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
- // translate (1 point)
- const int src1[] = { 0, 0 };
- const int dst1[] = { 5, 5 };
- doDraw(canvas, &paint, font, 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, font, 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, font, 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, font, src4, dst4, 4);
- canvas->restore();
- }
- private:
- typedef Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new PolyToPolyView(); )
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