d88c2e8e09
Change-Id: I9a6b2780cfdd91cdd16d5a08eb9ba1214492cb7e Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201982 Commit-Queue: Hal Canary <halcanary@google.com> Reviewed-by: Hal Canary <halcanary@google.com>
25 lines
1019 B
C++
25 lines
1019 B
C++
// Copyright 2019 Google LLC.
|
|
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
|
|
#include "fiddle/examples.h"
|
|
// HASH=0e03cd9f154603ed4b21ca56d69dae44
|
|
REG_FIDDLE(Matrix_invert, 256, 128, false, 0) {
|
|
void draw(SkCanvas* canvas) {
|
|
const SkPoint src[] = { { 10, 120}, {120, 120}, {120, 10}, { 10, 10} };
|
|
const SkPoint dst[] = { {150, 120}, {200, 100}, {240, 30}, { 130, 40} };
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
SkMatrix matrix;
|
|
matrix.setPolyToPoly(src, dst, 4);
|
|
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, src, paint);
|
|
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, dst, paint);
|
|
paint.setColor(SK_ColorBLUE);
|
|
paint.setStrokeWidth(3);
|
|
paint.setStrokeCap(SkPaint::kRound_Cap);
|
|
canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
|
|
if (matrix.invert(&matrix)) {
|
|
canvas->concat(matrix);
|
|
canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
|
|
}
|
|
}
|
|
} // END FIDDLE
|