Matrix_preSkew.cpp 659 B

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  1. // Copyright 2019 Google LLC.
  2. // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
  3. #include "tools/fiddle/examples.h"
  4. // HASH=199a18ad61d702664ce6df1d7037aa48
  5. REG_FIDDLE(Matrix_preSkew, 256, 256, false, 3) {
  6. void draw(SkCanvas* canvas) {
  7. SkMatrix matrix;
  8. SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {10, 206}};
  9. SkRect::Make(source.bounds()).toQuad(bitmapBounds);
  10. matrix.setPolyToPoly(bitmapBounds, perspect, 4);
  11. matrix.preSkew(.5f, 0, source.width() / 2, source.height() / 2);
  12. canvas->concat(matrix);
  13. canvas->drawBitmap(source, 0, 0);
  14. }
  15. } // END FIDDLE