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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkImagePriv.h"
#include "Test.h"
static const int gWidth = 20;
static const int gHeight = 20;
// Tests that SkNewImageFromBitmap obeys pixelref origin.
DEF_TEST(SkImageFromBitmap_extractSubset, reporter) {
sk_sp<SkImage> image;
{
SkBitmap srcBitmap;
srcBitmap.allocN32Pixels(gWidth, gHeight);
srcBitmap.eraseColor(SK_ColorRED);
SkCanvas canvas(srcBitmap);
SkIRect r = SkIRect::MakeXYWH(5, 5, gWidth - 5, gWidth - 5);
SkPaint p;
p.setColor(SK_ColorGREEN);
canvas.drawIRect(r, p);
SkBitmap dstBitmap;
srcBitmap.extractSubset(&dstBitmap, r);
image = SkImage::MakeFromBitmap(dstBitmap);
}
SkBitmap tgt;
tgt.allocN32Pixels(gWidth, gHeight);
SkCanvas canvas(tgt);
canvas.clear(SK_ColorTRANSPARENT);
canvas.drawImage(image, 0, 0, nullptr);
uint32_t pixel = 0;
SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
canvas.readPixels(info, &pixel, 4, 0, 0);
REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
canvas.readPixels(info, &pixel, 4, gWidth - 6, gWidth - 6);
REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
canvas.readPixels(info, &pixel, 4, gWidth - 5, gWidth - 5);
REPORTER_ASSERT(reporter, pixel == SK_ColorTRANSPARENT);
}
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