| // 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 |
| SkPMColor* pixels = new SkPMColor[size]; // allocate storage for pixels |
| // 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 |
| SkPMColor pmWhite = pixels[0]; // the Premultiplied format may vary |
| SkPaint paint; // by default, draws black |
| canvas->drawPoint(1, 1, paint); // draw in the center |
| for (int y = 0; y < info.height(); ++y) { |
| for (int x = 0; x < info.width(); ++x) { |
| SkDebugf("%c", *pixels++ == pmWhite ? '-' : 'x'); |
| } |
| SkDebugf("\n"); |
| } |
| delete[] pixels; |
| } |
| } // END FIDDLE |