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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/354829279): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "ui/gfx/geometry/axis_transform2d.h"
#include "base/strings/stringprintf.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/decomposed_transform.h"
#include "ui/gfx/geometry/test/geometry_util.h"
#include "ui/gfx/geometry/transform.h"
namespace gfx {
namespace {
TEST(AxisTransform2dTest, Mapping) {
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
PointF p(150.f, 100.f);
EXPECT_EQ(PointF(191.25f, 180.f), t.MapPoint(p));
EXPECT_POINTF_EQ(PointF(117.f, 36.f), t.InverseMapPoint(p));
RectF r(150.f, 100.f, 22.5f, 37.5f);
EXPECT_EQ(RectF(191.25f, 180.f, 28.125f, 46.875f), t.MapRect(r));
EXPECT_RECTF_EQ(RectF(117.f, 36.f, 18.f, 30.f), t.InverseMapRect(r));
}
TEST(AxisTransform2dTest, Scaling) {
{
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(3.75f, 55.f)),
PreScaleAxisTransform2d(t, 1.25));
t.PreScale(Vector2dF(1.25f, 1.25f));
EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(3.75f, 55.f)), t);
}
{
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(4.6875f, 68.75f)),
PostScaleAxisTransform2d(t, 1.25));
t.PostScale(Vector2dF(1.25f, 1.25f));
EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(4.6875f, 68.75f)), t);
}
}
TEST(AxisTransform2dTest, Translating) {
Vector2dF tr(3.f, -5.f);
{
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(7.5f, 48.75f)),
PreTranslateAxisTransform2d(t, tr));
t.PreTranslate(tr);
EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(7.5f, 48.75f)), t);
}
{
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(6.75f, 50.f)),
PostTranslateAxisTransform2d(t, tr));
t.PostTranslate(tr);
EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(6.75f, 50.f)), t);
}
}
TEST(AxisTransform2dTest, Concat) {
AxisTransform2d pre(1.25f, Vector2dF(3.75f, 55.f));
AxisTransform2d post(0.5f, Vector2dF(10.f, 5.f));
AxisTransform2d expectation(0.625f, Vector2dF(11.875f, 32.5f));
EXPECT_EQ(expectation, ConcatAxisTransform2d(post, pre));
AxisTransform2d post_concat = pre;
post_concat.PostConcat(post);
EXPECT_EQ(expectation, post_concat);
AxisTransform2d pre_concat = post;
pre_concat.PreConcat(pre);
EXPECT_EQ(expectation, pre_concat);
}
TEST(AxisTransform2dTest, Inverse) {
AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
AxisTransform2d inv_inplace = t;
inv_inplace.Invert();
AxisTransform2d inv_out_of_place = InvertAxisTransform2d(t);
EXPECT_AXIS_TRANSFORM2D_EQ(inv_inplace, inv_out_of_place);
EXPECT_AXIS_TRANSFORM2D_EQ(AxisTransform2d(),
ConcatAxisTransform2d(t, inv_inplace));
EXPECT_AXIS_TRANSFORM2D_EQ(AxisTransform2d(),
ConcatAxisTransform2d(inv_inplace, t));
}
TEST(AxisTransform2dTest, ClampOutput) {
double entries[][2] = {
// The first entry is used to initialize the transform.
// The second entry is used to initialize the object to be mapped.
{std::numeric_limits<float>::max(),
std::numeric_limits<float>::infinity()},
{1, std::numeric_limits<float>::infinity()},
{-1, std::numeric_limits<float>::infinity()},
{1, -std::numeric_limits<float>::infinity()},
{
std::numeric_limits<float>::max(),
std::numeric_limits<float>::max(),
},
{
std::numeric_limits<float>::lowest(),
-std::numeric_limits<float>::infinity(),
},
};
for (double* entry : entries) {
const float mv = entry[0];
const float factor = entry[1];
auto is_valid_point = [&](const PointF& p) -> bool {
return std::isfinite(p.x()) && std::isfinite(p.y());
};
auto is_valid_rect = [&](const RectF& r) -> bool {
return is_valid_point(r.origin()) && std::isfinite(r.width()) &&
std::isfinite(r.height());
};
auto test = [&](const AxisTransform2d& m) {
SCOPED_TRACE(base::StringPrintf("m: %s factor: %lg", m.ToString().c_str(),
factor));
auto p = m.MapPoint(PointF(factor, factor));
EXPECT_TRUE(is_valid_point(p)) << p.ToString();
// AxisTransform2d::MapRect() requires non-negative scales.
if (m.scale().x() >= 0 && m.scale().y() >= 0) {
auto r = m.MapRect(RectF(factor, factor, factor, factor));
EXPECT_TRUE(is_valid_rect(r)) << r.ToString();
}
};
test(AxisTransform2d::FromScaleAndTranslation(Vector2dF(mv, mv),
Vector2dF(mv, mv)));
test(AxisTransform2d::FromScaleAndTranslation(Vector2dF(mv, mv),
Vector2dF(0, 0)));
test(AxisTransform2d::FromScaleAndTranslation(Vector2dF(1, 1),
Vector2dF(mv, mv)));
}
}
TEST(AxisTransform2dTest, Decompose) {
{
auto transform = AxisTransform2d::FromScaleAndTranslation(
Vector2dF(2.5, -3.75), Vector2dF(4.25, -5.5));
DecomposedTransform decomp = transform.Decompose();
EXPECT_DECOMPOSED_TRANSFORM_EQ((DecomposedTransform{{4.25, -5.5, 0},
{2.5, -3.75, 1},
{0, 0, 0},
{0, 0, 0, 1},
{0, 0, 0, 1}}),
decomp);
EXPECT_EQ(Transform(transform), Transform::Compose(decomp));
}
{
auto transform = AxisTransform2d::FromScaleAndTranslation(
Vector2dF(-2.5, -3.75), Vector2dF(4.25, -5.5));
DecomposedTransform decomp = transform.Decompose();
EXPECT_DECOMPOSED_TRANSFORM_EQ((DecomposedTransform{{4.25, -5.5, 0},
{2.5, 3.75, 1},
{0, 0, 0},
{0, 0, 0, 1},
{0, 0, 1, 0}}),
decomp);
EXPECT_EQ(Transform(transform), Transform::Compose(decomp));
}
{
auto transform =
AxisTransform2d::FromScaleAndTranslation(Vector2dF(), Vector2dF());
DecomposedTransform decomp = transform.Decompose();
EXPECT_DECOMPOSED_TRANSFORM_EQ(
(DecomposedTransform{
{0, 0, 0}, {0, 0, 1}, {0, 0, 0}, {0, 0, 0, 1}, {0, 0, 0, 1}}),
decomp);
EXPECT_EQ(Transform(transform), Transform::Compose(decomp));
}
}
} // namespace
} // namespace gfx
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