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.
DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrTextureMipMapInvalidationTest,reporter,ctxInfo)20 DEF_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