submodule/skia/docs/examples/draw_pixel_array_nocopy.cpp

   1 // Copyright 2020 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 REG_FIDDLE(draw_pixel_array_nocopy, 256, 256, false, 5) {
   5 constexpr int kWidth = 4;
   6 constexpr int kHeight = 4;
   7 static const uint32_t kPixels[kHeight * kWidth] = {
   8         0xFF000000, 0xFF005500, 0xFF00AA00, 0xFF00FF00,
   9         0xFF000055, 0xFF005555, 0xFF00AA55, 0xFF00FF55,
  10         0xFF0000AA, 0xFF0055AA, 0xFF00AAAA, 0xFF00FFAA,
  11         0xFF0000FF, 0xFF0055FF, 0xFF00AAFF, 0xFF00FFFF,
  12 };
  13
  14 void draw(SkCanvas* canvas) {
  15     SkPixmap pixmap(SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType),
  16                     kPixels, sizeof(uint32_t) * kWidth);
  17     sk_sp<SkImage> img = SkImage::MakeFromRaster(pixmap, nullptr, nullptr);
  18
  19     canvas->scale(16, 16);
  20     canvas->drawImage(img, 6, 6);
  21 }
  22 }  // END FIDDLE