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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=525285073aae7e53eb8f454a398f880c
- REG_FIDDLE(Canvas_MakeRasterDirect, 256, 256, true, 0) {
- void draw(SkCanvas* ) {
- SkImageInfo info = SkImageInfo::MakeN32Premul(3, 3); // device aligned, 32 bpp, Premultiplied
- const size_t minRowBytes = info.minRowBytes(); // bytes used by one bitmap row
- const size_t size = info.computeMinByteSize(); // bytes used by all rows
- SkAutoTMalloc<SkPMColor> storage(size); // allocate storage for pixels
- SkPMColor* pixels = storage.get(); // get pointer to allocated storage
- // create a SkCanvas backed by a raster device, and delete it when the
- // function goes out of scope.
- std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirect(info, pixels, minRowBytes);
- canvas->clear(SK_ColorWHITE); // white is Unpremultiplied, in ARGB order
- canvas->flush(); // ensure that pixels are cleared
- SkPMColor pmWhite = pixels[0]; // the Premultiplied format may vary
- SkPaint paint; // by default, draws black
- canvas->drawPoint(1, 1, paint); // draw in the center
- canvas->flush(); // ensure that point was drawn
- for (int y = 0; y < info.height(); ++y) {
- for (int x = 0; x < info.width(); ++x) {
- SkDebugf("%c", *pixels++ == pmWhite ? '-' : 'x');
- }
- SkDebugf("\n");
- }
- }
- } // END FIDDLE
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