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 // HASH=818e4e1191e39d2a642902cbf253b399
5 REG_FIDDLE(ImageInfo_computeOffset, 256, 128, false, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 uint8_t pixels[][12] = { { 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00},
8 { 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00},
9 { 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00},
10 { 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0xFF},
11 { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
12 { 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00},
13 { 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00},
14 { 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00} };
15 SkImageInfo imageInfo = SkImageInfo::MakeA8(8, 8);
16 SkBitmap bitmap;
17 bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
18 SkPaint paint;
19 paint.setColor(SK_ColorRED);
20 canvas->drawBitmapRect(bitmap, SkRect::MakeWH(8, 8), SkRect::MakeWH(32, 32), &paint);
21 size_t offset = imageInfo.computeOffset(2, 3, sizeof(pixels[0]));
22 pixels[0][offset] = 0x7F;
23 offset = imageInfo.computeOffset(5, 3, sizeof(pixels[0]));
24 pixels[0][offset] = 0x7F;
25 bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
26 canvas->drawBitmapRect(bitmap, SkRect::MakeWH(8, 8), SkRect::MakeWH(128, 128), &paint);
27 }
28 } // END FIDDLE
29