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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "CanvasState.h"
#include "Matrix.h"
#include "Rect.h"
#include "hwui/Canvas.h"
#include "utils/LinearAllocator.h"
#include <SkClipOp.h>
#include <SkPath.h>
#include <gtest/gtest.h>
namespace android {
namespace uirenderer {
class NullClient : public CanvasStateClient {
void onViewportInitialized() override {}
void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) {}
GLuint getTargetFbo() const override { return 0; }
};
static NullClient sNullClient;
static bool approxEqual(const Matrix4& a, const Matrix4& b) {
for (int i = 0; i < 16; i++) {
if (!MathUtils::areEqual(a[i], b[i])) {
return false;
}
}
return true;
}
TEST(CanvasState, gettersAndSetters) {
CanvasState state(sNullClient);
state.initializeSaveStack(200, 200, 0, 0, 200, 200, Vector3());
ASSERT_EQ(state.getWidth(), 200);
ASSERT_EQ(state.getHeight(), 200);
Matrix4 simpleTranslate;
simpleTranslate.loadTranslate(10, 20, 0);
state.setMatrix(simpleTranslate);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(200, 200));
ASSERT_EQ(state.getLocalClipBounds(), Rect(-10, -20, 190, 180));
EXPECT_TRUE(approxEqual(*state.currentTransform(), simpleTranslate));
EXPECT_TRUE(state.clipIsSimple());
}
TEST(CanvasState, simpleClipping) {
CanvasState state(sNullClient);
state.initializeSaveStack(200, 200, 0, 0, 200, 200, Vector3());
state.clipRect(0, 0, 100, 100, SkClipOp::kIntersect);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(100, 100));
state.clipRect(10, 10, 200, 200, SkClipOp::kIntersect);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(10, 10, 100, 100));
state.clipRect(50, 50, 150, 150, SkClipOp::kReplace_deprecated);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(50, 50, 150, 150));
}
TEST(CanvasState, complexClipping) {
CanvasState state(sNullClient);
state.initializeSaveStack(200, 200, 0, 0, 200, 200, Vector3());
state.save(SaveFlags::MatrixClip);
{
// rotated clip causes complex clip
state.rotate(10);
EXPECT_TRUE(state.clipIsSimple());
state.clipRect(0, 0, 200, 200, SkClipOp::kIntersect);
EXPECT_FALSE(state.clipIsSimple());
}
state.restore();
state.save(SaveFlags::MatrixClip);
{
// subtracted clip causes complex clip
EXPECT_TRUE(state.clipIsSimple());
state.clipRect(50, 50, 150, 150, SkClipOp::kDifference);
EXPECT_FALSE(state.clipIsSimple());
}
state.restore();
state.save(SaveFlags::MatrixClip);
{
// complex path causes complex clip
SkPath path;
path.addOval(SkRect::MakeWH(200, 200));
EXPECT_TRUE(state.clipIsSimple());
state.clipPath(&path, SkClipOp::kDifference);
EXPECT_FALSE(state.clipIsSimple());
}
state.restore();
}
TEST(CanvasState, saveAndRestore) {
CanvasState state(sNullClient);
state.initializeSaveStack(200, 200, 0, 0, 200, 200, Vector3());
state.save(SaveFlags::Clip);
{
state.clipRect(0, 0, 10, 10, SkClipOp::kIntersect);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(10, 10));
}
state.restore();
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(200, 200)); // verify restore
Matrix4 simpleTranslate;
simpleTranslate.loadTranslate(10, 10, 0);
state.save(SaveFlags::Matrix);
{
state.translate(10, 10, 0);
EXPECT_TRUE(approxEqual(*state.currentTransform(), simpleTranslate));
}
state.restore();
EXPECT_FALSE(approxEqual(*state.currentTransform(), simpleTranslate));
}
TEST(CanvasState, saveAndRestoreButNotTooMuch) {
CanvasState state(sNullClient);
state.initializeSaveStack(200, 200, 0, 0, 200, 200, Vector3());
state.save(SaveFlags::Matrix); // NOTE: clip not saved
{
state.clipRect(0, 0, 10, 10, SkClipOp::kIntersect);
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(10, 10));
}
state.restore();
ASSERT_EQ(state.getRenderTargetClipBounds(), Rect(10, 10)); // verify not restored
Matrix4 simpleTranslate;
simpleTranslate.loadTranslate(10, 10, 0);
state.save(SaveFlags::Clip); // NOTE: matrix not saved
{
state.translate(10, 10, 0);
EXPECT_TRUE(approxEqual(*state.currentTransform(), simpleTranslate));
}
state.restore();
EXPECT_TRUE(approxEqual(*state.currentTransform(), simpleTranslate)); // verify not restored
}
}
}
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