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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 "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkRRect.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRegion.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkTypes.h"
- #include "include/private/SkMalloc.h"
- #include "include/utils/SkRandom.h"
- #include "src/core/SkAAClip.h"
- #include "src/core/SkMask.h"
- #include "src/core/SkRasterClip.h"
- #include "tests/Test.h"
- #include <string.h>
- static bool operator==(const SkMask& a, const SkMask& b) {
- if (a.fFormat != b.fFormat || a.fBounds != b.fBounds) {
- return false;
- }
- if (!a.fImage && !b.fImage) {
- return true;
- }
- if (!a.fImage || !b.fImage) {
- return false;
- }
- size_t wbytes = a.fBounds.width();
- switch (a.fFormat) {
- case SkMask::kBW_Format:
- wbytes = (wbytes + 7) >> 3;
- break;
- case SkMask::kA8_Format:
- case SkMask::k3D_Format:
- break;
- case SkMask::kLCD16_Format:
- wbytes <<= 1;
- break;
- case SkMask::kARGB32_Format:
- wbytes <<= 2;
- break;
- default:
- SkDEBUGFAIL("unknown mask format");
- return false;
- }
- const int h = a.fBounds.height();
- const char* aptr = (const char*)a.fImage;
- const char* bptr = (const char*)b.fImage;
- for (int y = 0; y < h; ++y) {
- if (memcmp(aptr, bptr, wbytes)) {
- return false;
- }
- aptr += wbytes;
- bptr += wbytes;
- }
- return true;
- }
- static void copyToMask(const SkRegion& rgn, SkMask* mask) {
- mask->fFormat = SkMask::kA8_Format;
- if (rgn.isEmpty()) {
- mask->fBounds.setEmpty();
- mask->fRowBytes = 0;
- mask->fImage = nullptr;
- return;
- }
- mask->fBounds = rgn.getBounds();
- mask->fRowBytes = mask->fBounds.width();
- mask->fImage = SkMask::AllocImage(mask->computeImageSize());
- sk_bzero(mask->fImage, mask->computeImageSize());
- SkImageInfo info = SkImageInfo::Make(mask->fBounds.width(),
- mask->fBounds.height(),
- kAlpha_8_SkColorType,
- kPremul_SkAlphaType);
- SkBitmap bitmap;
- bitmap.installPixels(info, mask->fImage, mask->fRowBytes);
- // canvas expects its coordinate system to always be 0,0 in the top/left
- // so we translate the rgn to match that before drawing into the mask.
- //
- SkRegion tmpRgn(rgn);
- tmpRgn.translate(-rgn.getBounds().fLeft, -rgn.getBounds().fTop);
- SkCanvas canvas(bitmap);
- canvas.clipRegion(tmpRgn);
- canvas.drawColor(SK_ColorBLACK);
- }
- static SkIRect rand_rect(SkRandom& rand, int n) {
- int x = rand.nextS() % n;
- int y = rand.nextS() % n;
- int w = rand.nextU() % n;
- int h = rand.nextU() % n;
- return SkIRect::MakeXYWH(x, y, w, h);
- }
- static void make_rand_rgn(SkRegion* rgn, SkRandom& rand) {
- int count = rand.nextU() % 20;
- for (int i = 0; i < count; ++i) {
- rgn->op(rand_rect(rand, 100), SkRegion::kXOR_Op);
- }
- }
- static bool operator==(const SkRegion& rgn, const SkAAClip& aaclip) {
- SkMask mask0, mask1;
- copyToMask(rgn, &mask0);
- aaclip.copyToMask(&mask1);
- bool eq = (mask0 == mask1);
- SkMask::FreeImage(mask0.fImage);
- SkMask::FreeImage(mask1.fImage);
- return eq;
- }
- static bool equalsAAClip(const SkRegion& rgn) {
- SkAAClip aaclip;
- aaclip.setRegion(rgn);
- return rgn == aaclip;
- }
- static void setRgnToPath(SkRegion* rgn, const SkPath& path) {
- SkIRect ir;
- path.getBounds().round(&ir);
- rgn->setPath(path, SkRegion(ir));
- }
- // aaclip.setRegion should create idential masks to the region
- static void test_rgn(skiatest::Reporter* reporter) {
- SkRandom rand;
- for (int i = 0; i < 1000; i++) {
- SkRegion rgn;
- make_rand_rgn(&rgn, rand);
- REPORTER_ASSERT(reporter, equalsAAClip(rgn));
- }
- {
- SkRegion rgn;
- SkPath path;
- path.addCircle(0, 0, SkIntToScalar(30));
- setRgnToPath(&rgn, path);
- REPORTER_ASSERT(reporter, equalsAAClip(rgn));
- path.reset();
- path.moveTo(0, 0);
- path.lineTo(SkIntToScalar(100), 0);
- path.lineTo(SkIntToScalar(100 - 20), SkIntToScalar(20));
- path.lineTo(SkIntToScalar(20), SkIntToScalar(20));
- setRgnToPath(&rgn, path);
- REPORTER_ASSERT(reporter, equalsAAClip(rgn));
- }
- }
- 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, nullptr, 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, nullptr, 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;
- clip0.copyToMask(&mask);
- REPORTER_ASSERT(reporter, nullptr == 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()) {
- ERRORF(reporter, "%s %s "
- "[%d %d %d %d] %s [%d %d %d %d] = BW:[%d %d %d %d] AA:[%d %d %d %d]\n",
- nonEmptyAA == nonEmptyBW ? "true" : "false",
- clip2.getBounds() == rgn2.getBounds() ? "true" : "false",
- 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());
- }
- SkMask maskBW, maskAA;
- copyToMask(rgn2, &maskBW);
- clip2.copyToMask(&maskAA);
- SkAutoMaskFreeImage freeBW(maskBW.fImage);
- SkAutoMaskFreeImage freeAA(maskAA.fImage);
- REPORTER_ASSERT(reporter, maskBW == maskAA);
- }
- }
- }
- static void test_path_with_hole(skiatest::Reporter* reporter) {
- static const uint8_t gExpectedImage[] = {
- 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF,
- };
- SkMask expected;
- expected.fBounds.set(0, 0, 4, 6);
- expected.fRowBytes = 4;
- expected.fFormat = SkMask::kA8_Format;
- expected.fImage = (uint8_t*)gExpectedImage;
- SkPath path;
- path.addRect(SkRect::MakeXYWH(0, 0,
- SkIntToScalar(4), SkIntToScalar(2)));
- path.addRect(SkRect::MakeXYWH(0, SkIntToScalar(4),
- SkIntToScalar(4), SkIntToScalar(2)));
- for (int i = 0; i < 2; ++i) {
- SkAAClip clip;
- clip.setPath(path, nullptr, 1 == i);
- SkMask mask;
- clip.copyToMask(&mask);
- SkAutoMaskFreeImage freeM(mask.fImage);
- REPORTER_ASSERT(reporter, expected == mask);
- }
- }
- static void test_really_a_rect(skiatest::Reporter* reporter) {
- SkRRect rrect;
- rrect.setRectXY(SkRect::MakeWH(100, 100), 5, 5);
- SkPath path;
- path.addRRect(rrect);
- SkAAClip clip;
- clip.setPath(path);
- REPORTER_ASSERT(reporter, clip.getBounds() == SkIRect::MakeWH(100, 100));
- REPORTER_ASSERT(reporter, !clip.isRect());
- // This rect should intersect the clip, but slice-out all of the "soft" parts,
- // leaving just a rect.
- const SkIRect ir = SkIRect::MakeLTRB(10, -10, 50, 90);
- clip.op(ir, SkRegion::kIntersect_Op);
- REPORTER_ASSERT(reporter, clip.getBounds() == SkIRect::MakeLTRB(10, 0, 50, 90));
- // the clip recognized that that it is just a rect!
- REPORTER_ASSERT(reporter, clip.isRect());
- }
- static void did_dx_affect(skiatest::Reporter* reporter, const SkScalar dx[],
- size_t count, bool changed) {
- const SkIRect baseBounds = SkIRect::MakeXYWH(0, 0, 10, 10);
- SkIRect ir = { 0, 0, 10, 10 };
- for (size_t i = 0; i < count; ++i) {
- SkRect r;
- r.set(ir);
- SkRasterClip rc0(ir);
- SkRasterClip rc1(ir);
- SkRasterClip rc2(ir);
- rc0.op(r, SkMatrix::I(), baseBounds, SkRegion::kIntersect_Op, false);
- r.offset(dx[i], 0);
- rc1.op(r, SkMatrix::I(), baseBounds, SkRegion::kIntersect_Op, true);
- r.offset(-2*dx[i], 0);
- rc2.op(r, SkMatrix::I(), baseBounds, SkRegion::kIntersect_Op, true);
- REPORTER_ASSERT(reporter, changed != (rc0 == rc1));
- REPORTER_ASSERT(reporter, changed != (rc0 == rc2));
- }
- }
- static void test_nearly_integral(skiatest::Reporter* reporter) {
- // All of these should generate equivalent rasterclips
- static const SkScalar gSafeX[] = {
- 0, SK_Scalar1/1000, SK_Scalar1/100, SK_Scalar1/10,
- };
- did_dx_affect(reporter, gSafeX, SK_ARRAY_COUNT(gSafeX), false);
- static const SkScalar gUnsafeX[] = {
- SK_Scalar1/4, SK_Scalar1/3,
- };
- did_dx_affect(reporter, gUnsafeX, SK_ARRAY_COUNT(gUnsafeX), true);
- }
- static void test_regressions() {
- // these should not assert in the debug build
- // bug was introduced in rev. 3209
- {
- SkAAClip clip;
- SkRect r;
- r.fLeft = 129.892181f;
- r.fTop = 10.3999996f;
- r.fRight = 130.892181f;
- r.fBottom = 20.3999996f;
- clip.setRect(r, true);
- }
- }
- // Building aaclip meant aa-scan-convert a path into a huge clip.
- // the old algorithm sized the supersampler to the size of the clip, which overflowed
- // its internal 16bit coordinates. The fix was to intersect the clip+path_bounds before
- // sizing the supersampler.
- //
- // Before the fix, the following code would assert in debug builds.
- //
- static void test_crbug_422693(skiatest::Reporter* reporter) {
- SkRasterClip rc(SkIRect::MakeLTRB(-25000, -25000, 25000, 25000));
- SkPath path;
- path.addCircle(50, 50, 50);
- rc.op(path, SkMatrix::I(), rc.getBounds(), SkRegion::kIntersect_Op, true);
- }
- static void test_huge(skiatest::Reporter* reporter) {
- SkAAClip clip;
- int big = 0x70000000;
- SkIRect r = { -big, -big, big, big };
- SkASSERT(r.width() < 0 && r.height() < 0);
- clip.setRect(r);
- }
- DEF_TEST(AAClip, reporter) {
- test_empty(reporter);
- test_path_bounds(reporter);
- test_irect(reporter);
- test_rgn(reporter);
- test_path_with_hole(reporter);
- test_regressions();
- test_nearly_integral(reporter);
- test_really_a_rect(reporter);
- test_crbug_422693(reporter);
- test_huge(reporter);
- }
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