skia2/docs/examples/Matrix_preRotate_2.cpp

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// 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=5acd49bd931c79a808dd6c7cc0e92f72
REG_FIDDLE(Matrix_preRotate_2, 256, 256, false, 3) {
void draw(SkCanvas* canvas) {
SkMatrix matrix;
SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {10, 206}};
SkRect::Make(image->bounds()).toQuad(bitmapBounds);
matrix.setPolyToPoly(bitmapBounds, perspect, 4);
matrix.preRotate(45);
canvas->concat(matrix);
canvas->drawImage(image, 0, 0);
}
} // END FIDDLE