1/*
2 * Copyright 2016 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 "SkTypes.h"
9
10#if SK_SUPPORT_GPU
11
12#include "GrContext.h"
13#include "GrTexturePriv.h"
14#include "SkCanvas.h"
15#include "SkImage_Base.h"
16#include "SkSurface.h"
17#include "Test.h"
18
19// Tests that MIP maps are created and invalidated as expected when drawing to and from GrTextures.
20DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrTextureMipMapInvalidationTest, reporter, ctxInfo) {
21    auto isMipped = [] (SkSurface* surf) {
22        const GrTexture* texture = surf->makeImageSnapshot()->getTexture();
23        return GrMipMapped::kYes == texture->texturePriv().mipMapped();
24    };
25
26    auto mipsAreDirty = [] (SkSurface* surf) {
27        return surf->makeImageSnapshot()->getTexture()->texturePriv().mipMapsAreDirty();
28    };
29
30    GrContext* context = ctxInfo.grContext();
31    auto info = SkImageInfo::MakeN32Premul(256, 256);
32    auto surf1 = SkSurface::MakeRenderTarget(context, SkBudgeted::kYes, info);
33    auto surf2 = SkSurface::MakeRenderTarget(context, SkBudgeted::kYes, info);
34    // Draw something just in case we ever had a solid color optimization
35    surf1->getCanvas()->drawCircle(128, 128, 50, SkPaint());
36    surf1->getCanvas()->flush();
37
38    // No mipmaps initially
39    REPORTER_ASSERT(reporter, !isMipped(surf1.get()));
40
41    // Painting with downscale and medium filter quality should result in mipmap creation
42    SkPaint paint;
43    paint.setFilterQuality(kMedium_SkFilterQuality);
44    surf2->getCanvas()->scale(0.2f, 0.2f);
45    surf2->getCanvas()->drawImage(surf1->makeImageSnapshot(), 0, 0, &paint);
46    surf2->getCanvas()->flush();
47    REPORTER_ASSERT(reporter, isMipped(surf1.get()));
48    REPORTER_ASSERT(reporter, !mipsAreDirty(surf1.get()));
49
50    // Changing the contents of the surface should invalidate the mipmap, but not de-allocate
51    surf1->getCanvas()->drawCircle(128, 128, 100, SkPaint());
52    surf1->getCanvas()->flush();
53    REPORTER_ASSERT(reporter, isMipped(surf1.get()));
54    REPORTER_ASSERT(reporter, mipsAreDirty(surf1.get()));
55}
56
57#endif
58