skia2/tests/PathOpsDRectTest.cpp

/*
 * Copyright 2012 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SkPathOpsCubic.h"
#include "SkPathOpsLine.h"
#include "SkPathOpsQuad.h"
#include "SkPathOpsRect.h"
#include "Test.h"

static const SkDLine lineTests[] = {
    {{{2, 1}, {2, 1}}},
    {{{2, 1}, {1, 1}}},
    {{{2, 1}, {2, 2}}},
    {{{1, 1}, {2, 2}}},
    {{{3, 0}, {2, 1}}},
    {{{3, 2}, {1, 1}}},
};

static const SkDQuad quadTests[] = {
    {{{1, 1}, {2, 1}, {0, 2}}},
    {{{0, 0}, {1, 1}, {3, 1}}},
    {{{2, 0}, {1, 1}, {2, 2}}},
    {{{4, 0}, {0, 1}, {4, 2}}},
    {{{0, 0}, {0, 1}, {1, 1}}},
};

static const SkDCubic cubicTests[] = {
    {{{2, 0}, {3, 1}, {2, 2}, {1, 1}}},
    {{{3, 1}, {2, 2}, {1, 1}, {2, 0}}},
    {{{3, 0}, {2, 1}, {3, 2}, {1, 1}}},
};

static const size_t lineTests_count = sizeof(lineTests) / sizeof(lineTests[0]);
static const size_t quadTests_count = sizeof(quadTests) / sizeof(quadTests[0]);
static const size_t cubicTests_count = sizeof(cubicTests) / sizeof(cubicTests[0]);

static void DRectTest(skiatest::Reporter* reporter) {
    size_t index;
    SkDRect rect, rect2;
    for (index = 0; index < lineTests_count; ++index) {
        const SkDLine& line = lineTests[index];
        rect.setBounds(line);
        REPORTER_ASSERT(reporter, rect.fLeft == SkTMin<double>(line[0].fX, line[1].fX));
        REPORTER_ASSERT(reporter, rect.fTop == SkTMin<double>(line[0].fY, line[1].fY));
        REPORTER_ASSERT(reporter, rect.fRight == SkTMax<double>(line[0].fX, line[1].fX));
        REPORTER_ASSERT(reporter, rect.fBottom == SkTMax<double>(line[0].fY, line[1].fY));
        rect2.set(line[0]);
        rect2.add(line[1]);
        REPORTER_ASSERT(reporter, rect2.fLeft == SkTMin<double>(line[0].fX, line[1].fX));
        REPORTER_ASSERT(reporter, rect2.fTop == SkTMin<double>(line[0].fY, line[1].fY));
        REPORTER_ASSERT(reporter, rect2.fRight == SkTMax<double>(line[0].fX, line[1].fX));
        REPORTER_ASSERT(reporter, rect2.fBottom == SkTMax<double>(line[0].fY, line[1].fY));
        REPORTER_ASSERT(reporter, rect.contains(line[0]));
        REPORTER_ASSERT(reporter, rect.intersects(&rect2));
    }
    for (index = 0; index < quadTests_count; ++index) {
        const SkDQuad& quad = quadTests[index];
        rect.setRawBounds(quad);
        REPORTER_ASSERT(reporter, rect.fLeft == SkTMin<double>(quad[0].fX,
                SkTMin<double>(quad[1].fX, quad[2].fX)));
        REPORTER_ASSERT(reporter, rect.fTop == SkTMin<double>(quad[0].fY,
                SkTMin<double>(quad[1].fY, quad[2].fY)));
        REPORTER_ASSERT(reporter, rect.fRight == SkTMax<double>(quad[0].fX,
                SkTMax<double>(quad[1].fX, quad[2].fX)));
        REPORTER_ASSERT(reporter, rect.fBottom == SkTMax<double>(quad[0].fY,
                SkTMax<double>(quad[1].fY, quad[2].fY)));
        rect2.setBounds(quad);
        REPORTER_ASSERT(reporter, rect.intersects(&rect2));
        // FIXME: add a recursive box subdivision method to verify that tight bounds is correct
        SkDPoint leftTop = {rect2.fLeft, rect2.fTop};
        REPORTER_ASSERT(reporter, rect.contains(leftTop));
        SkDPoint rightBottom = {rect2.fRight, rect2.fBottom};
        REPORTER_ASSERT(reporter, rect.contains(rightBottom));
    }
    for (index = 0; index < cubicTests_count; ++index) {
        const SkDCubic& cubic = cubicTests[index];
        rect.setRawBounds(cubic);
        REPORTER_ASSERT(reporter, rect.fLeft == SkTMin<double>(cubic[0].fX,
                SkTMin<double>(cubic[1].fX, SkTMin<double>(cubic[2].fX, cubic[3].fX))));
        REPORTER_ASSERT(reporter, rect.fTop == SkTMin<double>(cubic[0].fY,
                SkTMin<double>(cubic[1].fY, SkTMin<double>(cubic[2].fY, cubic[3].fY))));
        REPORTER_ASSERT(reporter, rect.fRight == SkTMax<double>(cubic[0].fX,
                SkTMax<double>(cubic[1].fX, SkTMax<double>(cubic[2].fX, cubic[3].fX))));
        REPORTER_ASSERT(reporter, rect.fBottom == SkTMax<double>(cubic[0].fY,
                SkTMax<double>(cubic[1].fY, SkTMax<double>(cubic[2].fY, cubic[3].fY))));
        rect2.setBounds(cubic);
        REPORTER_ASSERT(reporter, rect.intersects(&rect2));
        // FIXME: add a recursive box subdivision method to verify that tight bounds is correct
        SkDPoint leftTop = {rect2.fLeft, rect2.fTop};
        REPORTER_ASSERT(reporter, rect.contains(leftTop));
        SkDPoint rightBottom = {rect2.fRight, rect2.fBottom};
        REPORTER_ASSERT(reporter, rect.contains(rightBottom));
    }
}

#include "TestClassDef.h"
DEFINE_TESTCLASS("PathOpsDRect", PathOpsDRectClass, DRectTest)