25 lines
1.0 KiB
C++
25 lines
1.0 KiB
C++
// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "tools/fiddle/examples.h"
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// HASH=0e03cd9f154603ed4b21ca56d69dae44
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REG_FIDDLE(Matrix_invert, 256, 128, false, 0) {
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void draw(SkCanvas* canvas) {
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const SkPoint src[] = { { 10, 120}, {120, 120}, {120, 10}, { 10, 10} };
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const SkPoint dst[] = { {150, 120}, {200, 100}, {240, 30}, { 130, 40} };
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SkPaint paint;
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paint.setAntiAlias(true);
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SkMatrix matrix;
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matrix.setPolyToPoly(src, dst, 4);
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canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, src, paint);
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canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, dst, paint);
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paint.setColor(SK_ColorBLUE);
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paint.setStrokeWidth(3);
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paint.setStrokeCap(SkPaint::kRound_Cap);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
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if (matrix.invert(&matrix)) {
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canvas->concat(matrix);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
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}
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}
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} // END FIDDLE
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