1 /*
2 * Copyright 2014 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 "SkPicture.h"
10 #include "SkPictureRecorder.h"
11 #include "SkPictureShader.h"
12 #include "SkShader.h"
13 #include "SkSurface.h"
14 #include "Test.h"
15
16 // Test that attempting to create a picture shader with a nullptr picture or
17 // empty picture returns a shader that draws nothing.
DEF_TEST(PictureShader_empty,reporter)18 DEF_TEST(PictureShader_empty, reporter) {
19 SkPaint paint;
20
21 SkBitmap bitmap;
22 bitmap.allocN32Pixels(1,1);
23
24 SkCanvas canvas(bitmap);
25 canvas.clear(SK_ColorGREEN);
26
27 paint.setShader(SkShader::MakePictureShader(
28 nullptr, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, nullptr, nullptr));
29
30 canvas.drawRect(SkRect::MakeWH(1,1), paint);
31 REPORTER_ASSERT(reporter, *bitmap.getAddr32(0,0) == SK_ColorGREEN);
32
33
34 SkPictureRecorder factory;
35 factory.beginRecording(0, 0, nullptr, 0);
36 paint.setShader(SkShader::MakePictureShader(factory.finishRecordingAsPicture(),
37 SkShader::kClamp_TileMode,
38 SkShader::kClamp_TileMode, nullptr, nullptr));
39
40 canvas.drawRect(SkRect::MakeWH(1,1), paint);
41 REPORTER_ASSERT(reporter, *bitmap.getAddr32(0,0) == SK_ColorGREEN);
42 }
43
44 // Test that the SkPictureShader cache is purged on shader deletion.
DEF_TEST(PictureShader_caching,reporter)45 DEF_TEST(PictureShader_caching, reporter) {
46 auto makePicture = [] () {
47 SkPictureRecorder recorder;
48 recorder.beginRecording(100, 100)->drawColor(SK_ColorGREEN);
49 return recorder.finishRecordingAsPicture();
50 };
51
52 sk_sp<SkPicture> picture = makePicture();
53 REPORTER_ASSERT(reporter, picture->unique());
54
55 sk_sp<SkSurface> surface = SkSurface::MakeRasterN32Premul(100, 100);
56
57 {
58 SkPaint paint;
59 paint.setShader(SkPictureShader::Make(picture,
60 SkShader::kRepeat_TileMode,
61 SkShader::kRepeat_TileMode, nullptr, nullptr));
62 surface->getCanvas()->drawPaint(paint);
63
64 // We should have about 3 refs by now: local + shader + shader cache.
65 REPORTER_ASSERT(reporter, !picture->unique());
66 }
67
68 // Draw another picture shader to have a chance to purge.
69 {
70 SkPaint paint;
71 paint.setShader(SkPictureShader::Make(makePicture(),
72 SkShader::kRepeat_TileMode,
73 SkShader::kRepeat_TileMode, nullptr, nullptr));
74 surface->getCanvas()->drawPaint(paint);
75
76 }
77
78 // All but the local ref should be gone now.
79 REPORTER_ASSERT(reporter, picture->unique());
80 }
81