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 "include/core/SkAlphaType.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkColorType.h"
13 #include "include/core/SkImage.h"
14 #include "include/core/SkImageInfo.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkRefCnt.h"
18 #include "tests/Test.h"
19 #include <cstdint>
20
21 static const int gWidth = 20;
22 static const int gHeight = 20;
23
24 // Tests that SkNewImageFromBitmap obeys pixelref origin.
DEF_TEST(SkImageFromBitmap_extractSubset,reporter)25 DEF_TEST(SkImageFromBitmap_extractSubset, reporter) {
26 sk_sp<SkImage> image;
27 {
28 SkBitmap srcBitmap;
29 srcBitmap.allocN32Pixels(gWidth, gHeight);
30 srcBitmap.eraseColor(SK_ColorRED);
31 SkCanvas canvas(srcBitmap);
32 SkIRect r = SkIRect::MakeXYWH(5, 5, gWidth - 5, gWidth - 5);
33 SkPaint p;
34 p.setColor(SK_ColorGREEN);
35 canvas.drawIRect(r, p);
36 SkBitmap dstBitmap;
37 srcBitmap.extractSubset(&dstBitmap, r);
38 image = dstBitmap.asImage();
39 }
40
41 SkBitmap tgt;
42 tgt.allocN32Pixels(gWidth, gHeight);
43 SkCanvas canvas(tgt);
44 canvas.clear(SK_ColorTRANSPARENT);
45 canvas.drawImage(image, 0, 0);
46
47 uint32_t pixel = 0;
48 SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
49 tgt.readPixels(info, &pixel, 4, 0, 0);
50 REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
51 tgt.readPixels(info, &pixel, 4, gWidth - 6, gWidth - 6);
52 REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
53
54 tgt.readPixels(info, &pixel, 4, gWidth - 5, gWidth - 5);
55 REPORTER_ASSERT(reporter, pixel == SK_ColorTRANSPARENT);
56 }
57