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 REG_FIDDLE(Pixmap_writable_addrF16, 256, 64, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 SkImageInfo info = SkImageInfo::Make(1, 2, kRGBA_F16_SkColorType, kPremul_SkAlphaType);
7 uint16_t storage[2][4];
8 SkPixmap pixmap(info, storage[0], sizeof(uint64_t));
9 SkIRect topPixelBounds = {0, 0, 1, 1};
10 pixmap.erase({ 0.65f, 0.45f, 0.25f, 1 }, &topPixelBounds);
11 SkIRect bottomPixelBounds = {0, 1, 1, 2};
12 pixmap.erase({ 0.25f, 0.65f, 0.45f, 1 }, &bottomPixelBounds);
13 SkBitmap bitmap;
14 canvas->scale(20, 20);
15 bitmap.installPixels(pixmap);
16 canvas->drawImage(bitmap.asImage(), 0, 0);
17 uint16_t* pixel2 = pixmap.writable_addrF16(0, 1);
18 for (int i = 0; i < 4; ++i) {
19 pixel2[i] = storage[0][i];
20 }
21 bitmap.installPixels(pixmap);
22 canvas->drawImage(bitmap.asImage(), 4, 0);
23 }
24 } // END FIDDLE
25