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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 "SkBlitter.h"
#include "SkMask.h"
#include "Test.h"
#include <string.h>
class TestBlitter : public SkBlitter {
public:
TestBlitter(SkIRect bounds, skiatest::Reporter* reporter)
: fBounds(bounds)
, fReporter(reporter) { }
void blitH(int x, int y, int width) override {
REPORTER_ASSERT(fReporter, x >= fBounds.fLeft && x < fBounds.fRight);
REPORTER_ASSERT(fReporter, y >= fBounds.fTop && y < fBounds.fBottom);
int right = x + width;
REPORTER_ASSERT(fReporter, right > fBounds.fLeft && right <= fBounds.fRight);
}
private:
SkIRect fBounds;
skiatest::Reporter* fReporter;
};
// Exercise all clips compared with different widths of bitMask. Make sure that no buffer
// overruns happen.
DEF_TEST(BlitAndClip, reporter) {
const int originX = 100;
const int originY = 100;
for (int width = 1; width <= 32; width++) {
const int height = 2;
int rowBytes = (width + 7) >> 3;
uint8_t* bits = new uint8_t[rowBytes * height];
memset(bits, 0xAA, rowBytes * height);
SkIRect b = {originX, originY, originX + width, originY + height};
SkMask mask;
mask.fFormat = SkMask::kBW_Format;
mask.fBounds = b;
mask.fImage = (uint8_t*)bits;
mask.fRowBytes = rowBytes;
TestBlitter tb(mask.fBounds, reporter);
for (int top = b.fTop; top < b.fBottom; top++) {
for (int bottom = top + 1; bottom <= b.fBottom; bottom++) {
for (int left = b.fLeft; left < b.fRight; left++) {
for (int right = left + 1; right <= b.fRight; right++) {
SkIRect clipRect = {left, top, right, bottom};
tb.blitMask(mask, clipRect);
}
}
}
}
delete [] bits;
}
}
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