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#include "Test.h"
8#include "SkGraphics.h"
9#include "SkCanvas.h"
10
11static const int kCanvasSize = 1;
12static const int kBitmapSize = 16;
13static const int kScale = 8;
14
15static size_t test_scaled_image_cache_useage() {
16    SkAutoTUnref<SkCanvas> canvas(
17            SkCanvas::NewRasterN32(kCanvasSize, kCanvasSize));
18    SkBitmap bitmap;
19    SkAssertResult(bitmap.allocN32Pixels(kBitmapSize, kBitmapSize));
20    SkScalar scaledSize = SkIntToScalar(kScale * kBitmapSize);
21    canvas->clipRect(SkRect::MakeLTRB(0, 0, scaledSize, scaledSize));
22    SkPaint paint;
23    paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
24    size_t bytesUsed = SkGraphics::GetImageCacheBytesUsed();
25    canvas->drawBitmapRect(bitmap,
26                           SkRect::MakeLTRB(0, 0, scaledSize, scaledSize),
27                           &paint);
28    return SkGraphics::GetImageCacheBytesUsed() - bytesUsed;
29}
30
31// http://crbug.com/389439
32DEF_TEST(ScaledImageCache_SingleAllocationByteLimit, reporter) {
33    size_t originalByteLimit = SkGraphics::GetImageCacheByteLimit();
34    size_t originalAllocationLimit =
35        SkGraphics::GetImageCacheSingleAllocationByteLimit();
36
37    size_t size = kBitmapSize * kScale * kBitmapSize * kScale
38        * SkColorTypeBytesPerPixel(kN32_SkColorType);
39
40    SkGraphics::SetImageCacheByteLimit(0); // clear cache
41    SkGraphics::SetImageCacheByteLimit(2 * size);
42    SkGraphics::SetImageCacheSingleAllocationByteLimit(0);
43
44    REPORTER_ASSERT(reporter, size == test_scaled_image_cache_useage());
45
46    SkGraphics::SetImageCacheByteLimit(0); // clear cache
47    SkGraphics::SetImageCacheByteLimit(2 * size);
48    SkGraphics::SetImageCacheSingleAllocationByteLimit(size * 2);
49
50    REPORTER_ASSERT(reporter, size == test_scaled_image_cache_useage());
51
52    SkGraphics::SetImageCacheByteLimit(0); // clear cache
53    SkGraphics::SetImageCacheByteLimit(2 * size);
54    SkGraphics::SetImageCacheSingleAllocationByteLimit(size / 2);
55
56    REPORTER_ASSERT(reporter, 0 == test_scaled_image_cache_useage());
57
58    SkGraphics::SetImageCacheSingleAllocationByteLimit(originalAllocationLimit);
59    SkGraphics::SetImageCacheByteLimit(originalByteLimit);
60}
61