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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkAAClip.h"
#include "SkPath.h"
#include "SkRandom.h"
static const SkRegion::Op gRgnOps[] = {
SkRegion::kDifference_Op,
SkRegion::kIntersect_Op,
SkRegion::kUnion_Op,
SkRegion::kXOR_Op,
SkRegion::kReverseDifference_Op,
SkRegion::kReplace_Op
};
static const char* gRgnOpNames[] = {
"DIFF", "INTERSECT", "UNION", "XOR", "REVERSE_DIFF", "REPLACE"
};
static void imoveTo(SkPath& path, int x, int y) {
path.moveTo(SkIntToScalar(x), SkIntToScalar(y));
}
static void icubicTo(SkPath& path, int x0, int y0, int x1, int y1, int x2, int y2) {
path.cubicTo(SkIntToScalar(x0), SkIntToScalar(y0),
SkIntToScalar(x1), SkIntToScalar(y1),
SkIntToScalar(x2), SkIntToScalar(y2));
}
static void test_path_bounds(skiatest::Reporter* reporter) {
SkPath path;
SkAAClip clip;
const int height = 40;
const SkScalar sheight = SkIntToScalar(height);
path.addOval(SkRect::MakeWH(sheight, sheight));
REPORTER_ASSERT(reporter, sheight == path.getBounds().height());
clip.setPath(path, NULL, true);
REPORTER_ASSERT(reporter, height == clip.getBounds().height());
// this is the trimmed height of this cubic (with aa). The critical thing
// for this test is that it is less than height, which represents just
// the bounds of the path's control-points.
//
// This used to fail until we tracked the MinY in the BuilderBlitter.
//
const int teardrop_height = 12;
path.reset();
imoveTo(path, 0, 20);
icubicTo(path, 40, 40, 40, 0, 0, 20);
REPORTER_ASSERT(reporter, sheight == path.getBounds().height());
clip.setPath(path, NULL, true);
REPORTER_ASSERT(reporter, teardrop_height == clip.getBounds().height());
}
static void test_empty(skiatest::Reporter* reporter) {
SkAAClip clip0, clip1;
REPORTER_ASSERT(reporter, clip0.isEmpty());
REPORTER_ASSERT(reporter, clip0.getBounds().isEmpty());
REPORTER_ASSERT(reporter, clip1 == clip0);
clip0.translate(10, 10); // should have no effect on empty
REPORTER_ASSERT(reporter, clip0.isEmpty());
REPORTER_ASSERT(reporter, clip0.getBounds().isEmpty());
REPORTER_ASSERT(reporter, clip1 == clip0);
SkIRect r = { 10, 10, 40, 50 };
clip0.setRect(r);
REPORTER_ASSERT(reporter, !clip0.isEmpty());
REPORTER_ASSERT(reporter, !clip0.getBounds().isEmpty());
REPORTER_ASSERT(reporter, clip0 != clip1);
REPORTER_ASSERT(reporter, clip0.getBounds() == r);
clip0.setEmpty();
REPORTER_ASSERT(reporter, clip0.isEmpty());
REPORTER_ASSERT(reporter, clip0.getBounds().isEmpty());
REPORTER_ASSERT(reporter, clip1 == clip0);
SkMask mask;
mask.fImage = NULL;
clip0.copyToMask(&mask);
REPORTER_ASSERT(reporter, NULL == mask.fImage);
REPORTER_ASSERT(reporter, mask.fBounds.isEmpty());
}
static void rand_irect(SkIRect* r, int N, SkRandom& rand) {
r->setXYWH(0, 0, rand.nextU() % N, rand.nextU() % N);
int dx = rand.nextU() % (2*N);
int dy = rand.nextU() % (2*N);
// use int dx,dy to make the subtract be signed
r->offset(N - dx, N - dy);
}
static void test_irect(skiatest::Reporter* reporter) {
SkRandom rand;
for (int i = 0; i < 10000; i++) {
SkAAClip clip0, clip1;
SkRegion rgn0, rgn1;
SkIRect r0, r1;
rand_irect(&r0, 10, rand);
rand_irect(&r1, 10, rand);
clip0.setRect(r0);
clip1.setRect(r1);
rgn0.setRect(r0);
rgn1.setRect(r1);
for (size_t j = 0; j < SK_ARRAY_COUNT(gRgnOps); ++j) {
SkRegion::Op op = gRgnOps[j];
SkAAClip clip2;
SkRegion rgn2;
bool nonEmptyAA = clip2.op(clip0, clip1, op);
bool nonEmptyBW = rgn2.op(rgn0, rgn1, op);
if (nonEmptyAA != nonEmptyBW || clip2.getBounds() != rgn2.getBounds()) {
SkDebugf("[%d %d %d %d] %s [%d %d %d %d] = BW:[%d %d %d %d] AA:[%d %d %d %d]\n",
r0.fLeft, r0.fTop, r0.right(), r0.bottom(),
gRgnOpNames[j],
r1.fLeft, r1.fTop, r1.right(), r1.bottom(),
rgn2.getBounds().fLeft, rgn2.getBounds().fTop,
rgn2.getBounds().right(), rgn2.getBounds().bottom(),
clip2.getBounds().fLeft, clip2.getBounds().fTop,
clip2.getBounds().right(), clip2.getBounds().bottom());
}
REPORTER_ASSERT(reporter, nonEmptyAA == nonEmptyBW);
REPORTER_ASSERT(reporter, clip2.getBounds() == rgn2.getBounds());
}
}
}
static void TestAAClip(skiatest::Reporter* reporter) {
test_empty(reporter);
test_path_bounds(reporter);
test_irect(reporter);
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("AAClip", AAClipTestClass, TestAAClip)
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