35 lines
1.2 KiB
C++
35 lines
1.2 KiB
C++
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/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Test.h"
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#include "SkBitmap.h"
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#include "SkImage.h"
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// https://bug.skia.org/5096
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// Test that when we make an image from a subset of a bitmap, that it
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// has a diff (ID, dimensions) from an image made from the entire
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// bitmap or a different subset of the image.
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DEF_TEST(ImageBitmapIdentity, r) {
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SkBitmap bm, a, b;
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bm.allocN32Pixels(32, 64);
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bm.eraseColor(SK_ColorBLACK);
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bm.setImmutable();
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(void)bm.extractSubset(&a, SkIRect::MakeXYWH(0, 0, 32, 32));
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(void)bm.extractSubset(&b, SkIRect::MakeXYWH(0, 32, 32, 32));
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REPORTER_ASSERT(r, a.getGenerationID() == b.getGenerationID());
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auto img = SkImage::MakeFromBitmap(bm);
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auto imgA = SkImage::MakeFromBitmap(a);
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auto imgB = SkImage::MakeFromBitmap(b);
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REPORTER_ASSERT(r, img->uniqueID() == bm.getGenerationID());
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REPORTER_ASSERT(r, img->uniqueID() != imgA->uniqueID());
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REPORTER_ASSERT(r, img->uniqueID() != imgB->uniqueID());
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REPORTER_ASSERT(r, imgA->uniqueID() != imgB->uniqueID());
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REPORTER_ASSERT(r, imgA->uniqueID() != a.getGenerationID());
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REPORTER_ASSERT(r, imgB->uniqueID() != b.getGenerationID());
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}
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