48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
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* Copyright 2015 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 "SkCanvas.h"
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#include "SkImagePriv.h"
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#include "Test.h"
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static const int gWidth = 20;
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static const int gHeight = 20;
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// Tests that SkNewImageFromBitmap obeys pixelref origin.
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DEF_TEST(SkImageFromBitmap_extractSubset, reporter) {
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SkAutoTUnref<SkImage> image;
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{
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SkBitmap srcBitmap;
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srcBitmap.allocN32Pixels(gWidth, gHeight);
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srcBitmap.eraseColor(SK_ColorRED);
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SkCanvas canvas(srcBitmap);
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SkIRect r = SkIRect::MakeXYWH(5, 5, gWidth - 5, gWidth - 5);
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SkPaint p;
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p.setColor(SK_ColorGREEN);
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canvas.drawIRect(r, p);
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SkBitmap dstBitmap;
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srcBitmap.extractSubset(&dstBitmap, r);
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image.reset(SkNewImageFromRasterBitmap(dstBitmap, true, NULL));
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}
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SkBitmap tgt;
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tgt.allocN32Pixels(gWidth, gHeight);
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SkCanvas canvas(tgt);
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canvas.clear(SK_ColorTRANSPARENT);
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canvas.drawImage(image, 0, 0, NULL);
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uint32_t pixel = 0;
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SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
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canvas.readPixels(info, &pixel, 4, 0, 0);
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REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
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canvas.readPixels(info, &pixel, 4, gWidth - 6, gWidth - 6);
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REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
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canvas.readPixels(info, &pixel, 4, gWidth - 5, gWidth - 5);
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REPORTER_ASSERT(reporter, pixel == SK_ColorTRANSPARENT);
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}
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