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(Canvas_copy_const_SkBitmap, 256, 256, true, 0) {
draw(SkCanvas *)5 void draw(SkCanvas* ) {
6 SkBitmap bitmap;
7 // create a bitmap 5 wide and 11 high
8 bitmap.allocPixels(SkImageInfo::MakeN32Premul(5, 11));
9 SkCanvas canvas(bitmap);
10 canvas.clear(SK_ColorWHITE); // white is Unpremultiplied, in ARGB order
11 SkPixmap pixmap; // provides guaranteed access to the drawn pixels
12 if (!canvas.peekPixels(&pixmap)) {
13 SkDebugf("peekPixels should never fail.\n");
14 }
15 const SkPMColor* pixels = pixmap.addr32(); // points to top-left of bitmap
16 SkPMColor pmWhite = pixels[0]; // the Premultiplied format may vary
17 SkPaint paint; // by default, draws black, 12 point text
18 SkFont font = SkFont(fontMgr->matchFamilyStyle(nullptr, {}));
19 canvas.drawString("!", 1, 10, font, paint); // 1 char at baseline (1, 10)
20 for (int y = 0; y < bitmap.height(); ++y) {
21 for (int x = 0; x < bitmap.width(); ++x) {
22 SkDebugf("%c", *pixels++ == pmWhite ? '-' : 'x');
23 }
24 SkDebugf("\n");
25 }
26 }
27 } // END FIDDLE
28