/* * 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/SkDrawLooper.h" #include "include/core/SkPoint3.h" #include "include/core/SkTypes.h" #include "include/effects/SkLightingImageFilter.h" #include "src/core/SkArenaAlloc.h" #include "tests/Test.h" /* * Subclass of looper that just draws once, with an offset in X. */ class TestLooper : public SkDrawLooper { public: SkDrawLooper::Context* makeContext(SkCanvas*, SkArenaAlloc* alloc) const override { return alloc->make<TestDrawLooperContext>(); } private: SK_FLATTENABLE_HOOKS(TestLooper) class TestDrawLooperContext : public SkDrawLooper::Context { public: TestDrawLooperContext() : fOnce(true) {} ~TestDrawLooperContext() override {} bool next(SkCanvas* canvas, SkPaint*) override { if (fOnce) { fOnce = false; canvas->translate(SkIntToScalar(10), 0); return true; } return false; } private: bool fOnce; }; }; sk_sp<SkFlattenable> TestLooper::CreateProc(SkReadBuffer&) { return sk_make_sp<TestLooper>(); } static void test_drawBitmap(skiatest::Reporter* reporter) { SkBitmap src; src.allocN32Pixels(10, 10); src.eraseColor(SK_ColorWHITE); SkBitmap dst; dst.allocN32Pixels(10, 10); dst.eraseColor(SK_ColorTRANSPARENT); SkCanvas canvas(dst); SkPaint paint; // we are initially transparent REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); // we see the bitmap drawn canvas.drawBitmap(src, 0, 0, &paint); REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); // reverify we are clear again dst.eraseColor(SK_ColorTRANSPARENT); REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); // if the bitmap is clipped out, we don't draw it canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); // now install our looper, which will draw, since it internally translates // to the left. The test is to ensure that canvas' quickReject machinary // allows us through, even though sans-looper we would look like we should // be clipped out. paint.setLooper(sk_make_sp<TestLooper>()); canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); } static void test_layers(skiatest::Reporter* reporter) { SkCanvas canvas(100, 100); SkRect r = SkRect::MakeWH(10, 10); REPORTER_ASSERT(reporter, false == canvas.quickReject(r)); r.offset(300, 300); REPORTER_ASSERT(reporter, true == canvas.quickReject(r)); // Test that saveLayer updates quickReject SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70); canvas.saveLayer(&bounds, nullptr); REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10))); REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60))); } static void test_quick_reject(skiatest::Reporter* reporter) { SkCanvas canvas(100, 100); SkRect r0 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f); SkRect r1 = SkRect::MakeLTRB(-50.0f, 110.0f, 50.0f, 120.0f); SkRect r2 = SkRect::MakeLTRB(110.0f, -50.0f, 120.0f, 50.0f); SkRect r3 = SkRect::MakeLTRB(-120.0f, -50.0f, 120.0f, 50.0f); SkRect r4 = SkRect::MakeLTRB(-50.0f, -120.0f, 50.0f, 120.0f); SkRect r5 = SkRect::MakeLTRB(-120.0f, -120.0f, 120.0f, 120.0f); SkRect r6 = SkRect::MakeLTRB(-120.0f, -120.0f, -110.0f, -110.0f); SkRect r7 = SkRect::MakeLTRB(SK_ScalarNaN, -50.0f, 50.0f, 50.0f); SkRect r8 = SkRect::MakeLTRB(-50.0f, SK_ScalarNaN, 50.0f, 50.0f); SkRect r9 = SkRect::MakeLTRB(-50.0f, -50.0f, SK_ScalarNaN, 50.0f); SkRect r10 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, SK_ScalarNaN); REPORTER_ASSERT(reporter, false == canvas.quickReject(r0)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r1)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r2)); REPORTER_ASSERT(reporter, false == canvas.quickReject(r3)); REPORTER_ASSERT(reporter, false == canvas.quickReject(r4)); REPORTER_ASSERT(reporter, false == canvas.quickReject(r5)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r6)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r7)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r8)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r9)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r10)); SkMatrix m = SkMatrix::MakeScale(2.0f); m.setTranslateX(10.0f); m.setTranslateY(10.0f); canvas.setMatrix(m); SkRect r11 = SkRect::MakeLTRB(5.0f, 5.0f, 100.0f, 100.0f); SkRect r12 = SkRect::MakeLTRB(5.0f, 50.0f, 100.0f, 100.0f); SkRect r13 = SkRect::MakeLTRB(50.0f, 5.0f, 100.0f, 100.0f); REPORTER_ASSERT(reporter, false == canvas.quickReject(r11)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r12)); REPORTER_ASSERT(reporter, true == canvas.quickReject(r13)); } DEF_TEST(QuickReject, reporter) { test_drawBitmap(reporter); test_layers(reporter); test_quick_reject(reporter); } // Regression test to make sure that we keep fIsScaleTranslate up to date on the canvas. // It is possible to set a new matrix on the canvas without calling setMatrix(). This tests // that code path. DEF_TEST(QuickReject_MatrixState, reporter) { SkCanvas canvas(100, 100); SkMatrix matrix; matrix.setRotate(45.0f); canvas.setMatrix(matrix); SkPaint paint; sk_sp<SkImageFilter> filter = SkLightingImageFilter::MakeDistantLitDiffuse( SkPoint3::Make(1.0f, 1.0f, 1.0f), 0xFF0000FF, 2.0f, 0.5f, nullptr); REPORTER_ASSERT(reporter, filter); paint.setImageFilter(filter); SkCanvas::SaveLayerRec rec; rec.fPaint = &paint; canvas.saveLayer(rec); // quickReject() will assert if the matrix is out of sync. canvas.quickReject(SkRect::MakeWH(100.0f, 100.0f)); } #include "include/core/SkSurface.h" #include "include/effects/SkLayerDrawLooper.h" DEF_TEST(looper_nothingtodraw, reporter) { auto surf = SkSurface::MakeRasterN32Premul(20, 20); SkPaint paint; paint.setColor(0); REPORTER_ASSERT(reporter, paint.nothingToDraw()); SkLayerDrawLooper::Builder builder; builder.addLayer(); paint.setDrawLooper(builder.detach()); // the presence of the looper fools this predicate, so we think it might draw REPORTER_ASSERT(reporter, !paint.nothingToDraw()); // Before fixing, this would assert in ~AutoDrawLooper() in SkCanvas.cpp as it checked for // a balance in the save/restore count after handling the looper. Before the fix, this // code would call nothingToDraw() and since it now clears the looper, that predicate will // return true, aborting the sequence prematurely, and not finishing the iterator on the looper // which handles the final "restore". This was a bug -- we *must* call the looper's iterator // until it returns done to keep the canvas balanced. The fix was to remove this early-exit // in the autodrawlooper. Now this call won't assert. // See https://skia-review.googlesource.com/c/skia/+/121220 surf->getCanvas()->drawRect({1, 1, 10, 10}, paint); }