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skia2/tests/CanvasTest.cpp
Mike Reed 46784be70c hide getClipStack 
BUG=skia:6122

Change-Id: I0aca03b349541174ced019f4f2116e0015c980c4
Reviewed-on: https://skia-review.googlesource.com/7097
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
2017-01-17 16:10:57 +00:00

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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Description:
* This test defines a series of elementatry test steps that perform
* a single or a small group of canvas API calls. Each test step is
* used in several test cases that verify that different types of SkCanvas
* flavors and derivatives pass it and yield consistent behavior. The
* test cases analyse results that are queryable through the API. They do
* not look at rendering results.
*
* Adding test stepss:
* The general pattern for creating a new test step is to write a test
* function of the form:
*
* static void MyTestStepFunction(SkCanvas* canvas,
* const TestData& d,
* skiatest::Reporter* reporter,
* CanvasTestStep* testStep)
* {
* canvas->someCanvasAPImethod();
* (...)
* REPORTER_ASSERT_MESSAGE(reporter, (...), \
* testStep->assertMessage());
* }
*
* The definition of the test step function should be followed by an
* invocation of the TEST_STEP macro, which generates a class and
* instance for the test step:
*
* TEST_STEP(MyTestStep, MyTestStepFunction)
*
* There are also short hand macros for defining simple test steps
* in a single line of code. A simple test step is a one that is made
* of a single canvas API call.
*
* SIMPLE_TEST_STEP(MytestStep, someCanvasAPIMethod());
*
* There is another macro called SIMPLE_TEST_STEP_WITH_ASSERT that
* works the same way as SIMPLE_TEST_STEP, and additionally verifies
* that the invoked method returns a non-zero value.
*/
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkClipStack.h"
#include "SkDocument.h"
#include "SkMatrix.h"
#include "SkNWayCanvas.h"
#include "SkPaint.h"
#include "SkPaintFilterCanvas.h"
#include "SkPath.h"
#include "SkPicture.h"
#include "SkPictureRecord.h"
#include "SkPictureRecorder.h"
#include "SkRasterClip.h"
#include "SkRect.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "SkTemplates.h"
#include "SkTDArray.h"
#include "Test.h"
static const int kWidth = 2, kHeight = 2;
static void createBitmap(SkBitmap* bm, SkColor color) {
bm->allocN32Pixels(kWidth, kHeight);
bm->eraseColor(color);
}
///////////////////////////////////////////////////////////////////////////////
// Constants used by test steps
const SkPoint kTestPoints[] = {
{SkIntToScalar(0), SkIntToScalar(0)},
{SkIntToScalar(2), SkIntToScalar(1)},
{SkIntToScalar(0), SkIntToScalar(2)}
};
const SkPoint kTestPoints2[] = {
{ SkIntToScalar(0), SkIntToScalar(1) },
{ SkIntToScalar(1), SkIntToScalar(1) },
{ SkIntToScalar(2), SkIntToScalar(1) },
{ SkIntToScalar(3), SkIntToScalar(1) },
{ SkIntToScalar(4), SkIntToScalar(1) },
{ SkIntToScalar(5), SkIntToScalar(1) },
{ SkIntToScalar(6), SkIntToScalar(1) },
{ SkIntToScalar(7), SkIntToScalar(1) },
{ SkIntToScalar(8), SkIntToScalar(1) },
{ SkIntToScalar(9), SkIntToScalar(1) },
{ SkIntToScalar(10), SkIntToScalar(1) }
};
struct TestData {
public:
TestData()
: fRect(SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(2), SkIntToScalar(1)))
, fMatrix(TestMatrix())
, fPath(TestPath())
, fNearlyZeroLengthPath(TestNearlyZeroLengthPath())
, fIRect(SkIRect::MakeXYWH(0, 0, 2, 1))
, fRegion(TestRegion())
, fColor(0x01020304)
, fPoints(kTestPoints)
, fPointCount(3)
, fWidth(2)
, fHeight(2)
, fText("Hello World")
, fPoints2(kTestPoints2)
, fBitmap(TestBitmap())
{ }
SkRect fRect;
SkMatrix fMatrix;
SkPath fPath;
SkPath fNearlyZeroLengthPath;
SkIRect fIRect;
SkRegion fRegion;
SkColor fColor;
SkPaint fPaint;
const SkPoint* fPoints;
size_t fPointCount;
int fWidth;
int fHeight;
SkString fText;
const SkPoint* fPoints2;
SkBitmap fBitmap;
private:
static SkMatrix TestMatrix() {
SkMatrix matrix;
matrix.reset();
matrix.setScale(SkIntToScalar(2), SkIntToScalar(3));
return matrix;
}
static SkPath TestPath() {
SkPath path;
path.addRect(SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(2), SkIntToScalar(1)));
return path;
}
static SkPath TestNearlyZeroLengthPath() {
SkPath path;
SkPoint pt1 = { 0, 0 };
SkPoint pt2 = { 0, SK_ScalarNearlyZero };
SkPoint pt3 = { SkIntToScalar(1), 0 };
SkPoint pt4 = { SkIntToScalar(1), SK_ScalarNearlyZero/2 };
path.moveTo(pt1);
path.lineTo(pt2);
path.lineTo(pt3);
path.lineTo(pt4);
return path;
}
static SkRegion TestRegion() {
SkRegion region;
SkIRect rect = SkIRect::MakeXYWH(0, 0, 2, 1);
region.setRect(rect);
return region;
}
static SkBitmap TestBitmap() {
SkBitmap bitmap;
createBitmap(&bitmap, 0x05060708);
return bitmap;
}
};
class Canvas2CanvasClipVisitor : public SkCanvas::ClipVisitor {
public:
Canvas2CanvasClipVisitor(SkCanvas* target) : fTarget(target) {}
void clipRect(const SkRect& r, SkClipOp op, bool aa) override {
fTarget->clipRect(r, op, aa);
}
void clipRRect(const SkRRect& r, SkClipOp op, bool aa) override {
fTarget->clipRRect(r, op, aa);
}
void clipPath(const SkPath& p, SkClipOp op, bool aa) override {
fTarget->clipPath(p, op, aa);
}
private:
SkCanvas* fTarget;
};
static void test_clipstack(skiatest::Reporter* reporter) {
#ifdef SK_SUPPORT_LEGACY_CANVAS_GETCLIPSTACK
// The clipstack is refcounted, and needs to be able to out-live the canvas if a client has
// ref'd it.
const SkClipStack* cs = nullptr;
{
SkCanvas canvas(10, 10);
cs = SkRef(canvas.getClipStack());
}
REPORTER_ASSERT(reporter, cs->unique());
cs->unref();
#endif
}
// Format strings that describe the test context. The %s token is where
// the name of the test step is inserted. The context is required for
// disambiguating the error in the case of failures that are reported in
// functions that are called multiple times in different contexts (test
// cases and test steps).
static const char* const kDefaultAssertMessageFormat = "%s";
static const char* const kCanvasDrawAssertMessageFormat =
"Drawing test step %s with SkCanvas";
static const char* const kPdfAssertMessageFormat =
"PDF sanity check failed %s";
class CanvasTestStep;
static SkTDArray<CanvasTestStep*>& testStepArray() {
static SkTDArray<CanvasTestStep*> theTests;
return theTests;
}
class CanvasTestStep {
public:
CanvasTestStep(bool fEnablePdfTesting = true) {
*testStepArray().append() = this;
fAssertMessageFormat = kDefaultAssertMessageFormat;
this->fEnablePdfTesting = fEnablePdfTesting;
}
virtual ~CanvasTestStep() { }
virtual void draw(SkCanvas*, const TestData&, skiatest::Reporter*) = 0;
virtual const char* name() const = 0;
const char* assertMessage() {
fAssertMessage.printf(fAssertMessageFormat, name());
return fAssertMessage.c_str();
}
void setAssertMessageFormat(const char* format) {
fAssertMessageFormat = format;
}
bool enablePdfTesting() { return fEnablePdfTesting; }
private:
SkString fAssertMessage;
const char* fAssertMessageFormat;
bool fEnablePdfTesting;
};
///////////////////////////////////////////////////////////////////////////////
// Macros for defining test steps
#define TEST_STEP(NAME, FUNCTION) \
class NAME##_TestStep : public CanvasTestStep{ \
public: \
virtual void draw(SkCanvas* canvas, const TestData& d, \
skiatest::Reporter* reporter) { \
FUNCTION (canvas, d, reporter, this); \
} \
virtual const char* name() const {return #NAME ;} \
}; \
static NAME##_TestStep NAME##_TestStepInstance;
#define TEST_STEP_NO_PDF(NAME, FUNCTION) \
class NAME##_TestStep : public CanvasTestStep{ \
public: \
NAME##_TestStep() : CanvasTestStep(false) {} \
virtual void draw(SkCanvas* canvas, const TestData& d, \
skiatest::Reporter* reporter) { \
FUNCTION (canvas, d, reporter, this); \
} \
virtual const char* name() const {return #NAME ;} \
}; \
static NAME##_TestStep NAME##_TestStepInstance;
#define SIMPLE_TEST_STEP(NAME, CALL) \
static void NAME##TestStep(SkCanvas* canvas, const TestData& d, \
skiatest::Reporter*, CanvasTestStep*) { \
canvas-> CALL ; \
} \
TEST_STEP(NAME, NAME##TestStep )
#define SIMPLE_TEST_STEP_WITH_ASSERT(NAME, CALL) \
static void NAME##TestStep(SkCanvas* canvas, const TestData& d, \
skiatest::Reporter*, CanvasTestStep* testStep) { \
REPORTER_ASSERT_MESSAGE(reporter, canvas-> CALL , \
testStep->assertMessage()); \
} \
TEST_STEP(NAME, NAME##TestStep )
///////////////////////////////////////////////////////////////////////////////
// Basic test steps for most virtual methods in SkCanvas that draw or affect
// the state of the canvas.
SIMPLE_TEST_STEP(Translate, translate(SkIntToScalar(1), SkIntToScalar(2)));
SIMPLE_TEST_STEP(Scale, scale(SkIntToScalar(1), SkIntToScalar(2)));
SIMPLE_TEST_STEP(Rotate, rotate(SkIntToScalar(1)));
SIMPLE_TEST_STEP(Skew, skew(SkIntToScalar(1), SkIntToScalar(2)));
SIMPLE_TEST_STEP(Concat, concat(d.fMatrix));
SIMPLE_TEST_STEP(SetMatrix, setMatrix(d.fMatrix));
SIMPLE_TEST_STEP(ClipRect, clipRect(d.fRect));
SIMPLE_TEST_STEP(ClipPath, clipPath(d.fPath));
SIMPLE_TEST_STEP(ClipRegion, clipRegion(d.fRegion, kReplace_SkClipOp));
SIMPLE_TEST_STEP(Clear, clear(d.fColor));
///////////////////////////////////////////////////////////////////////////////
// Complex test steps
static void SaveMatrixClipStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter* reporter, CanvasTestStep* testStep) {
int saveCount = canvas->getSaveCount();
canvas->save();
canvas->translate(SkIntToScalar(1), SkIntToScalar(2));
canvas->clipRegion(d.fRegion);
canvas->restore();
REPORTER_ASSERT_MESSAGE(reporter, canvas->getSaveCount() == saveCount,
testStep->assertMessage());
REPORTER_ASSERT_MESSAGE(reporter, canvas->getTotalMatrix().isIdentity(),
testStep->assertMessage());
// REPORTER_ASSERT_MESSAGE(reporter, canvas->getTotalClip() != kTestRegion, testStep->assertMessage());
}
TEST_STEP(SaveMatrixClip, SaveMatrixClipStep);
static void SaveLayerStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter* reporter, CanvasTestStep* testStep) {
int saveCount = canvas->getSaveCount();
canvas->saveLayer(nullptr, nullptr);
canvas->restore();
REPORTER_ASSERT_MESSAGE(reporter, canvas->getSaveCount() == saveCount,
testStep->assertMessage());
}
TEST_STEP(SaveLayer, SaveLayerStep);
static void BoundedSaveLayerStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter* reporter, CanvasTestStep* testStep) {
int saveCount = canvas->getSaveCount();
canvas->saveLayer(&d.fRect, nullptr);
canvas->restore();
REPORTER_ASSERT_MESSAGE(reporter, canvas->getSaveCount() == saveCount,
testStep->assertMessage());
}
TEST_STEP(BoundedSaveLayer, BoundedSaveLayerStep);
static void PaintSaveLayerStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter* reporter, CanvasTestStep* testStep) {
int saveCount = canvas->getSaveCount();
canvas->saveLayer(nullptr, &d.fPaint);
canvas->restore();
REPORTER_ASSERT_MESSAGE(reporter, canvas->getSaveCount() == saveCount,
testStep->assertMessage());
}
TEST_STEP(PaintSaveLayer, PaintSaveLayerStep);
static void TwoClipOpsStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
// This test exercises a functionality in SkPicture that leads to the
// recording of restore offset placeholders. This test will trigger an
// assertion at playback time if the placeholders are not properly
// filled when the recording ends.
canvas->clipRect(d.fRect);
canvas->clipRegion(d.fRegion);
}
TEST_STEP(TwoClipOps, TwoClipOpsStep);
// exercise fix for http://code.google.com/p/skia/issues/detail?id=560
// ('SkPathStroker::lineTo() fails for line with length SK_ScalarNearlyZero')
static void DrawNearlyZeroLengthPathTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
SkPaint paint;
paint.setStrokeWidth(SkIntToScalar(1));
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(d.fNearlyZeroLengthPath, paint);
}
TEST_STEP(DrawNearlyZeroLengthPath, DrawNearlyZeroLengthPathTestStep);
static void DrawVerticesShaderTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
SkPoint pts[4];
pts[0].set(0, 0);
pts[1].set(SkIntToScalar(d.fWidth), 0);
pts[2].set(SkIntToScalar(d.fWidth), SkIntToScalar(d.fHeight));
pts[3].set(0, SkIntToScalar(d.fHeight));
SkPaint paint;
paint.setShader(SkShader::MakeBitmapShader(d.fBitmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode));
canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode, 4, pts, pts,
nullptr, SkBlendMode::kModulate, nullptr, 0, paint);
}
// NYI: issue 240.
TEST_STEP_NO_PDF(DrawVerticesShader, DrawVerticesShaderTestStep);
static void DrawPictureTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
SkPictureRecorder recorder;
SkCanvas* testCanvas = recorder.beginRecording(SkIntToScalar(d.fWidth), SkIntToScalar(d.fHeight),
nullptr, 0);
testCanvas->scale(SkIntToScalar(2), SkIntToScalar(1));
testCanvas->clipRect(d.fRect);
testCanvas->drawRect(d.fRect, d.fPaint);
canvas->drawPicture(recorder.finishRecordingAsPicture());
}
TEST_STEP(DrawPicture, DrawPictureTestStep);
static void SaveRestoreTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter* reporter, CanvasTestStep* testStep) {
int baseSaveCount = canvas->getSaveCount();
int n = canvas->save();
REPORTER_ASSERT_MESSAGE(reporter, baseSaveCount == n, testStep->assertMessage());
REPORTER_ASSERT_MESSAGE(reporter, baseSaveCount + 1 == canvas->getSaveCount(),
testStep->assertMessage());
canvas->save();
canvas->save();
REPORTER_ASSERT_MESSAGE(reporter, baseSaveCount + 3 == canvas->getSaveCount(),
testStep->assertMessage());
canvas->restoreToCount(baseSaveCount + 1);
REPORTER_ASSERT_MESSAGE(reporter, baseSaveCount + 1 == canvas->getSaveCount(),
testStep->assertMessage());
// should this pin to 1, or be a no-op, or crash?
canvas->restoreToCount(0);
REPORTER_ASSERT_MESSAGE(reporter, 1 == canvas->getSaveCount(),
testStep->assertMessage());
}
TEST_STEP(SaveRestore, SaveRestoreTestStep);
static void NestedSaveRestoreWithSolidPaintTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
// This test step challenges the TestDeferredCanvasStateConsistency
// test cases because the opaque paint can trigger an optimization
// that discards previously recorded commands. The challenge is to maintain
// correct clip and matrix stack state.
canvas->resetMatrix();
canvas->rotate(SkIntToScalar(30));
canvas->save();
canvas->translate(SkIntToScalar(2), SkIntToScalar(1));
canvas->save();
canvas->scale(SkIntToScalar(3), SkIntToScalar(3));
SkPaint paint;
paint.setColor(0xFFFFFFFF);
canvas->drawPaint(paint);
canvas->restore();
canvas->restore();
}
TEST_STEP(NestedSaveRestoreWithSolidPaint, \
NestedSaveRestoreWithSolidPaintTestStep);
static void NestedSaveRestoreWithFlushTestStep(SkCanvas* canvas, const TestData& d,
skiatest::Reporter*, CanvasTestStep*) {
// This test step challenges the TestDeferredCanvasStateConsistency
// test case because the canvas flush on a deferred canvas will
// reset the recording session. The challenge is to maintain correct
// clip and matrix stack state on the playback canvas.
canvas->resetMatrix();
canvas->rotate(SkIntToScalar(30));
canvas->save();
canvas->translate(SkIntToScalar(2), SkIntToScalar(1));
canvas->save();
canvas->scale(SkIntToScalar(3), SkIntToScalar(3));
canvas->drawRect(d.fRect,d.fPaint);
canvas->flush();
canvas->restore();
canvas->restore();
}
TEST_STEP(NestedSaveRestoreWithFlush, NestedSaveRestoreWithFlushTestStep);
static void DescribeTopLayerTestStep(SkCanvas* canvas,
const TestData& d,
skiatest::Reporter* reporter,
CanvasTestStep* testStep) {
SkMatrix m;
SkIRect r;
// NOTE: adjustToTopLayer() does *not* reduce the clip size, even if the canvas
// is smaller than 10x10!
canvas->temporary_internal_describeTopLayer(&m, &r);
REPORTER_ASSERT_MESSAGE(reporter, m.isIdentity(), testStep->assertMessage());
REPORTER_ASSERT_MESSAGE(reporter, r == SkIRect::MakeXYWH(0, 0, 2, 2),
testStep->assertMessage());
// Putting a full-canvas layer on it should make no change to the results.
SkRect layerBounds = SkRect::MakeXYWH(0.f, 0.f, 10.f, 10.f);
canvas->saveLayer(layerBounds, nullptr);
canvas->temporary_internal_describeTopLayer(&m, &r);
REPORTER_ASSERT_MESSAGE(reporter, m.isIdentity(), testStep->assertMessage());
REPORTER_ASSERT_MESSAGE(reporter, r == SkIRect::MakeXYWH(0, 0, 2, 2),
testStep->assertMessage());
canvas->restore();
// Adding a translated layer translates the results.
// Default canvas is only 2x2, so can't offset our layer by very much at all;
// saveLayer() aborts if the bounds don't intersect.
layerBounds = SkRect::MakeXYWH(1.f, 1.f, 6.f, 6.f);
canvas->saveLayer(layerBounds, nullptr);
canvas->temporary_internal_describeTopLayer(&m, &r);
REPORTER_ASSERT_MESSAGE(reporter, m == SkMatrix::MakeTrans(-1.f, -1.f),
testStep->assertMessage());
REPORTER_ASSERT_MESSAGE(reporter, r == SkIRect::MakeXYWH(0, 0, 1, 1),
testStep->assertMessage());
canvas->restore();
}
TEST_STEP(DescribeTopLayer, DescribeTopLayerTestStep);
static void TestPdfDevice(skiatest::Reporter* reporter, const TestData& d, CanvasTestStep* step) {
SkDynamicMemoryWStream outStream;
sk_sp<SkDocument> doc(SkDocument::MakePDF(&outStream));
REPORTER_ASSERT(reporter, doc);
if (!doc) {
return;
}
SkCanvas* canvas = doc->beginPage(SkIntToScalar(d.fWidth),
SkIntToScalar(d.fHeight));
REPORTER_ASSERT(reporter, canvas);
step->setAssertMessageFormat(kPdfAssertMessageFormat);
step->draw(canvas, d, reporter);
}
/*
* This sub-test verifies that the test step passes when executed
* with SkCanvas and with classes derrived from SkCanvas. It also verifies
* that the all canvas derivatives report the same state as an SkCanvas
* after having executed the test step.
*/
static void TestOverrideStateConsistency(skiatest::Reporter* reporter, const TestData& d,
CanvasTestStep* testStep) {
SkBitmap referenceStore;
createBitmap(&referenceStore, 0xFFFFFFFF);
SkCanvas referenceCanvas(referenceStore);
testStep->setAssertMessageFormat(kCanvasDrawAssertMessageFormat);
testStep->draw(&referenceCanvas, d, reporter);
test_clipstack(reporter);
}
static void test_newraster(skiatest::Reporter* reporter) {
SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
const size_t minRowBytes = info.minRowBytes();
const size_t size = info.getSafeSize(minRowBytes);
SkAutoTMalloc<SkPMColor> storage(size);
SkPMColor* baseAddr = storage.get();
sk_bzero(baseAddr, size);
std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
REPORTER_ASSERT(reporter, canvas);
SkPixmap pmap;
const SkPMColor* addr = canvas->peekPixels(&pmap) ? pmap.addr32() : nullptr;
REPORTER_ASSERT(reporter, addr);
REPORTER_ASSERT(reporter, info == pmap.info());
REPORTER_ASSERT(reporter, minRowBytes == pmap.rowBytes());
for (int y = 0; y < info.height(); ++y) {
for (int x = 0; x < info.width(); ++x) {
REPORTER_ASSERT(reporter, 0 == addr[x]);
}
addr = (const SkPMColor*)((const char*)addr + pmap.rowBytes());
}
// now try a deliberately bad info
info = info.makeWH(-1, info.height());
REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
// too big
info = info.makeWH(1 << 30, 1 << 30);
REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
// not a valid pixel type
info = SkImageInfo::Make(10, 10, kUnknown_SkColorType, info.alphaType());
REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
// We should succeed with a zero-sized valid info
info = SkImageInfo::MakeN32Premul(0, 0);
canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
REPORTER_ASSERT(reporter, canvas);
}
DEF_TEST(Canvas, reporter) {
TestData d;
for (int testStep = 0; testStep < testStepArray().count(); testStep++) {
TestOverrideStateConsistency(reporter, d, testStepArray()[testStep]);
if (testStepArray()[testStep]->enablePdfTesting()) {
TestPdfDevice(reporter, d, testStepArray()[testStep]);
}
}
test_newraster(reporter);
}
DEF_TEST(Canvas_SaveState, reporter) {
SkCanvas canvas(10, 10);
REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
int n = canvas.save();
REPORTER_ASSERT(reporter, 1 == n);
REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
n = canvas.saveLayer(nullptr, nullptr);
REPORTER_ASSERT(reporter, 2 == n);
REPORTER_ASSERT(reporter, 3 == canvas.getSaveCount());
canvas.restore();
REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
canvas.restore();
REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
}
DEF_TEST(Canvas_ClipEmptyPath, reporter) {
SkCanvas canvas(10, 10);
canvas.save();
SkPath path;
canvas.clipPath(path);
canvas.restore();
canvas.save();
path.moveTo(5, 5);
canvas.clipPath(path);
canvas.restore();
canvas.save();
path.moveTo(7, 7);
canvas.clipPath(path); // should not assert here
canvas.restore();
}
#define SHADOW_TEST_CANVAS_CONST 10
#ifdef SK_EXPERIMENTAL_SHADOWING
class SkShadowTestCanvas : public SkPaintFilterCanvas {
public:
SkShadowTestCanvas(int x, int y, skiatest::Reporter* reporter)
: INHERITED(x,y)
, fReporter(reporter) {}
bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type type) const {
REPORTER_ASSERT(this->fReporter, this->getZ() == SHADOW_TEST_CANVAS_CONST);
return true;
}
void testUpdateDepth(skiatest::Reporter *reporter) {
// set some depths (with picture enabled), then check them as they get set
REPORTER_ASSERT(reporter, this->getZ() == 0);
this->translateZ(-10);
REPORTER_ASSERT(reporter, this->getZ() == -10);
this->save();
this->translateZ(20);
REPORTER_ASSERT(reporter, this->getZ() == 10);
this->restore();
REPORTER_ASSERT(reporter, this->getZ() == -10);
this->translateZ(13.14f);
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(this->getZ(), 3.14f));
}
private:
skiatest::Reporter* fReporter;
typedef SkPaintFilterCanvas INHERITED;
};
#endif
namespace {
class MockFilterCanvas : public SkPaintFilterCanvas {
public:
MockFilterCanvas(SkCanvas* canvas) : INHERITED(canvas) { }
protected:
bool onFilter(SkTCopyOnFirstWrite<SkPaint>*, Type) const override { return true; }
private:
typedef SkPaintFilterCanvas INHERITED;
};
} // anonymous namespace
// SkPaintFilterCanvas should inherit the initial target canvas state.
DEF_TEST(PaintFilterCanvas_ConsistentState, reporter) {
SkCanvas canvas(100, 100);
canvas.clipRect(SkRect::MakeXYWH(12.7f, 12.7f, 75, 75));
canvas.scale(0.5f, 0.75f);
SkRect clip1, clip2;
MockFilterCanvas filterCanvas(&canvas);
REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
REPORTER_ASSERT(reporter, canvas.getClipBounds(&clip1) == filterCanvas.getClipBounds(&clip2));
REPORTER_ASSERT(reporter, clip1 == clip2);
filterCanvas.clipRect(SkRect::MakeXYWH(30.5f, 30.7f, 100, 100));
filterCanvas.scale(0.75f, 0.5f);
REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
REPORTER_ASSERT(reporter, canvas.getClipBounds(&clip1) == filterCanvas.getClipBounds(&clip2));
REPORTER_ASSERT(reporter, clip2.contains(clip1));
#ifdef SK_EXPERIMENTAL_SHADOWING
SkShadowTestCanvas* tCanvas = new SkShadowTestCanvas(100,100, reporter);
tCanvas->testUpdateDepth(reporter);
delete(tCanvas);
SkPictureRecorder recorder;
SkShadowTestCanvas *tSCanvas = new SkShadowTestCanvas(100, 100, reporter);
SkCanvas *tPCanvas = recorder.beginRecording(SkRect::MakeIWH(100, 100));
tPCanvas->translateZ(SHADOW_TEST_CANVAS_CONST);
sk_sp<SkPicture> pic = recorder.finishRecordingAsPicture();
tSCanvas->drawPicture(pic);
delete(tSCanvas);
#endif
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkDeferredCanvas.h"
#include "SkDumpCanvas.h"
DEF_TEST(DeferredCanvas, r) {
SkDebugfDumper dumper;
SkDumpCanvas dumpC(&dumper);
SkDeferredCanvas canvas(&dumpC);
SkPaint paint;
// paint.setShader(SkShader::MakeColorShader(SK_ColorRED));
canvas.save();
canvas.clipRect(SkRect::MakeWH(55, 55));
canvas.translate(10, 20);
canvas.drawRect(SkRect::MakeWH(50, 50), paint);
canvas.restore();
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkCanvasStack.h"
#include "SkNWayCanvas.h"
// Subclass that takes a bool*, which it updates in its construct (true) and destructor (false)
// to allow the caller to know how long the object is alive.
class LifeLineCanvas : public SkCanvas {
bool* fLifeLine;
public:
LifeLineCanvas(int w, int h, bool* lifeline) : SkCanvas(w, h), fLifeLine(lifeline) {
*fLifeLine = true;
}
~LifeLineCanvas() {
*fLifeLine = false;
}
};
// Check that NWayCanvas does NOT try to manage the lifetime of its sub-canvases
DEF_TEST(NWayCanvas, r) {
const int w = 10;
const int h = 10;
bool life[2];
{
LifeLineCanvas c0(w, h, &life[0]);
REPORTER_ASSERT(r, life[0]);
}
REPORTER_ASSERT(r, !life[0]);
std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
REPORTER_ASSERT(r, life[0]);
REPORTER_ASSERT(r, life[1]);
{
SkNWayCanvas nway(w, h);
nway.addCanvas(c0.get());
nway.addCanvas(c1.get());
REPORTER_ASSERT(r, life[0]);
REPORTER_ASSERT(r, life[1]);
}
// Now assert that the death of the nway has NOT also killed the sub-canvases
REPORTER_ASSERT(r, life[0]);
REPORTER_ASSERT(r, life[1]);
}
// Check that CanvasStack DOES manage the lifetime of its sub-canvases
DEF_TEST(CanvasStack, r) {
const int w = 10;
const int h = 10;
bool life[2];
std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
REPORTER_ASSERT(r, life[0]);
REPORTER_ASSERT(r, life[1]);
{
SkCanvasStack stack(w, h);
stack.pushCanvas(std::move(c0), {0,0});
stack.pushCanvas(std::move(c1), {0,0});
REPORTER_ASSERT(r, life[0]);
REPORTER_ASSERT(r, life[1]);
}
// Now assert that the death of the canvasstack has also killed the sub-canvases
REPORTER_ASSERT(r, !life[0]);
REPORTER_ASSERT(r, !life[1]);
}
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