skia2/docs/examples/Matrix_mapXY.cpp
Herb Derby 5623d9e36f Replace SK_ARRAY_COUNT with std::size() for skia/docs
Change-Id: I9569ba4760546be6302c24658e64cb58c7db86e5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/550697
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2022-06-16 20:09:58 +00:00

21 lines
763 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 "tools/fiddle/examples.h"
// HASH=9e50185d502dc6903783679a84106089
REG_FIDDLE(Matrix_mapXY, 256, 256, false, 0) {
void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
SkMatrix matrix;
matrix.setRotate(60, 128, 128);
SkPoint lines[] = {{50, 50}, {150, 50}, {150, 150}};
for (size_t i = 0; i < std::size(lines); ++i) {
SkPoint pt;
matrix.mapXY(lines[i].fX, lines[i].fY, &pt);
canvas->drawCircle(pt.fX, pt.fY, 3, paint);
}
canvas->concat(matrix);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, std::size(lines), lines, paint);
}
} // END FIDDLE