1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkCanvas.h"
9 #include "SkImagePriv.h"
10 #include "Test.h"
11
12 static const int gWidth = 20;
13 static const int gHeight = 20;
14
15 // Tests that SkNewImageFromBitmap obeys pixelref origin.
DEF_TEST(SkImageFromBitmap_extractSubset,reporter)16 DEF_TEST(SkImageFromBitmap_extractSubset, reporter) {
17 sk_sp<SkImage> image;
18 {
19 SkBitmap srcBitmap;
20 srcBitmap.allocN32Pixels(gWidth, gHeight);
21 srcBitmap.eraseColor(SK_ColorRED);
22 SkCanvas canvas(srcBitmap);
23 SkIRect r = SkIRect::MakeXYWH(5, 5, gWidth - 5, gWidth - 5);
24 SkPaint p;
25 p.setColor(SK_ColorGREEN);
26 canvas.drawIRect(r, p);
27 SkBitmap dstBitmap;
28 srcBitmap.extractSubset(&dstBitmap, r);
29 image = SkImage::MakeFromBitmap(dstBitmap);
30 }
31
32 SkBitmap tgt;
33 tgt.allocN32Pixels(gWidth, gHeight);
34 SkCanvas canvas(tgt);
35 canvas.clear(SK_ColorTRANSPARENT);
36 canvas.drawImage(image, 0, 0, nullptr);
37
38 uint32_t pixel = 0;
39 SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
40 tgt.readPixels(info, &pixel, 4, 0, 0);
41 REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
42 tgt.readPixels(info, &pixel, 4, gWidth - 6, gWidth - 6);
43 REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
44
45 tgt.readPixels(info, &pixel, 4, gWidth - 5, gWidth - 5);
46 REPORTER_ASSERT(reporter, pixel == SK_ColorTRANSPARENT);
47 }
48