xref: /aosp_15_r20/external/skia/docs/examples/Bitmap_pixmap.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
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(Bitmap_pixmap, 256, 256, true, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkBitmap bitmap;
7     bitmap.allocPixels(SkImageInfo::MakeN32Premul(10, 11));
8     SkCanvas offscreen(bitmap);
9     offscreen.clear(SK_ColorWHITE);
10     SkPaint paint;
11     SkFont font = SkFont(fontMgr->matchFamilyStyle(nullptr, {}));
12     font.setEdging(SkFont::Edging::kAlias);
13     offscreen.drawString("&", 0, 10, font, paint);
14     const SkPixmap& pixmap = bitmap.pixmap();
15     if (pixmap.addr()) {
16         SkPMColor pmWhite = *pixmap.addr32(0, 0);
17         for (int y = 0; y < pixmap.height(); ++y) {
18             for (int x = 0; x < pixmap.width(); ++x) {
19                 SkDebugf("%c", *pixmap.addr32(x, y) == pmWhite ? '-' : 'x');
20             }
21             SkDebugf("\n");
22         }
23     }
24 }
25 }  // END FIDDLE
26