skia2/docs/examples/draw_a8_bitmap.cpp
Hal Canary 6c8422c671 add more docs/examples from named fiddles.
ignore offscreen, srgb, and animated fiddles for now.

Change-Id: I923131b684865698e6cda138b004930e11f504d5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263713
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2020-01-14 19:22:26 +00:00

19 lines
644 B
C++

// Copyright 2020 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"
REG_FIDDLE(draw_a8_bitmap, 256, 256, false, 3) {
void draw(SkCanvas* canvas) {
SkBitmap bitmap;
bitmap.allocPixels(SkImageInfo::MakeA8(256, 256));
for (int y = 0; y < bitmap.height(); ++y) {
for (int x = 0; x < bitmap.width(); ++x) {
*bitmap.getAddr8(x, y) = (2 * x + 2 * y) & 0xFF;
}
}
SkPaint paint;
paint.setColor(0xFF00FF00);
canvas->clear(0xFF000000);
canvas->drawBitmap(bitmap, 0, 0, &paint);
}
} // END FIDDLE