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199 lines
7.3 KiB
199 lines
7.3 KiB
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkArenaAlloc.h"
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkColorSpaceXformer.h"
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#include "SkDrawLooper.h"
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#include "SkLightingImageFilter.h"
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#include "SkPoint3.h"
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#include "SkTypes.h"
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#include "Test.h"
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/*
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* Subclass of looper that just draws once, with an offset in X.
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*/
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class TestLooper : public SkDrawLooper {
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public:
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SkDrawLooper::Context* makeContext(SkCanvas*, SkArenaAlloc* alloc) const override {
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return alloc->make<TestDrawLooperContext>();
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}
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sk_sp<SkDrawLooper> onMakeColorSpace(SkColorSpaceXformer*) const override {
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return nullptr;
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}
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private:
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SK_FLATTENABLE_HOOKS(TestLooper)
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class TestDrawLooperContext : public SkDrawLooper::Context {
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public:
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TestDrawLooperContext() : fOnce(true) {}
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~TestDrawLooperContext() override {}
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bool next(SkCanvas* canvas, SkPaint*) override {
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if (fOnce) {
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fOnce = false;
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canvas->translate(SkIntToScalar(10), 0);
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return true;
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}
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return false;
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}
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private:
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bool fOnce;
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};
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};
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sk_sp<SkFlattenable> TestLooper::CreateProc(SkReadBuffer&) { return sk_make_sp<TestLooper>(); }
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static void test_drawBitmap(skiatest::Reporter* reporter) {
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SkBitmap src;
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src.allocN32Pixels(10, 10);
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src.eraseColor(SK_ColorWHITE);
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SkBitmap dst;
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dst.allocN32Pixels(10, 10);
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dst.eraseColor(SK_ColorTRANSPARENT);
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SkCanvas canvas(dst);
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SkPaint paint;
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// we are initially transparent
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REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
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// we see the bitmap drawn
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canvas.drawBitmap(src, 0, 0, &paint);
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REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
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// reverify we are clear again
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dst.eraseColor(SK_ColorTRANSPARENT);
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REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
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// if the bitmap is clipped out, we don't draw it
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canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
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REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
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// now install our looper, which will draw, since it internally translates
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// to the left. The test is to ensure that canvas' quickReject machinary
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// allows us through, even though sans-looper we would look like we should
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// be clipped out.
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paint.setLooper(sk_make_sp<TestLooper>());
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canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
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REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
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}
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static void test_layers(skiatest::Reporter* reporter) {
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SkCanvas canvas(100, 100);
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SkRect r = SkRect::MakeWH(10, 10);
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r));
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r.offset(300, 300);
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r));
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// Test that saveLayer updates quickReject
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SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70);
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canvas.saveLayer(&bounds, nullptr);
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REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10)));
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REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60)));
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}
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static void test_quick_reject(skiatest::Reporter* reporter) {
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SkCanvas canvas(100, 100);
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SkRect r0 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
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SkRect r1 = SkRect::MakeLTRB(-50.0f, 110.0f, 50.0f, 120.0f);
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SkRect r2 = SkRect::MakeLTRB(110.0f, -50.0f, 120.0f, 50.0f);
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SkRect r3 = SkRect::MakeLTRB(-120.0f, -50.0f, 120.0f, 50.0f);
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SkRect r4 = SkRect::MakeLTRB(-50.0f, -120.0f, 50.0f, 120.0f);
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SkRect r5 = SkRect::MakeLTRB(-120.0f, -120.0f, 120.0f, 120.0f);
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SkRect r6 = SkRect::MakeLTRB(-120.0f, -120.0f, -110.0f, -110.0f);
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SkRect r7 = SkRect::MakeLTRB(SK_ScalarNaN, -50.0f, 50.0f, 50.0f);
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SkRect r8 = SkRect::MakeLTRB(-50.0f, SK_ScalarNaN, 50.0f, 50.0f);
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SkRect r9 = SkRect::MakeLTRB(-50.0f, -50.0f, SK_ScalarNaN, 50.0f);
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SkRect r10 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, SK_ScalarNaN);
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r0));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r1));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r2));
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r3));
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r4));
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r5));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r6));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r7));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r8));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r9));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r10));
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SkMatrix m = SkMatrix::MakeScale(2.0f);
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m.setTranslateX(10.0f);
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m.setTranslateY(10.0f);
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canvas.setMatrix(m);
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SkRect r11 = SkRect::MakeLTRB(5.0f, 5.0f, 100.0f, 100.0f);
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SkRect r12 = SkRect::MakeLTRB(5.0f, 50.0f, 100.0f, 100.0f);
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SkRect r13 = SkRect::MakeLTRB(50.0f, 5.0f, 100.0f, 100.0f);
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REPORTER_ASSERT(reporter, false == canvas.quickReject(r11));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r12));
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REPORTER_ASSERT(reporter, true == canvas.quickReject(r13));
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}
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DEF_TEST(QuickReject, reporter) {
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test_drawBitmap(reporter);
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test_layers(reporter);
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test_quick_reject(reporter);
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}
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// Regression test to make sure that we keep fIsScaleTranslate up to date on the canvas.
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// It is possible to set a new matrix on the canvas without calling setMatrix(). This tests
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// that code path.
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DEF_TEST(QuickReject_MatrixState, reporter) {
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SkCanvas canvas(100, 100);
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SkMatrix matrix;
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matrix.setRotate(45.0f);
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canvas.setMatrix(matrix);
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SkPaint paint;
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sk_sp<SkImageFilter> filter = SkLightingImageFilter::MakeDistantLitDiffuse(
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SkPoint3::Make(1.0f, 1.0f, 1.0f), 0xFF0000FF, 2.0f, 0.5f, nullptr);
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REPORTER_ASSERT(reporter, filter);
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paint.setImageFilter(filter);
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SkCanvas::SaveLayerRec rec;
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rec.fPaint = &paint;
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canvas.saveLayer(rec);
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// quickReject() will assert if the matrix is out of sync.
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canvas.quickReject(SkRect::MakeWH(100.0f, 100.0f));
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}
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#include "SkLayerDrawLooper.h"
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#include "SkSurface.h"
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DEF_TEST(looper_nothingtodraw, reporter) {
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auto surf = SkSurface::MakeRasterN32Premul(20, 20);
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SkPaint paint;
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paint.setColor(0);
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REPORTER_ASSERT(reporter, paint.nothingToDraw());
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SkLayerDrawLooper::Builder builder;
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builder.addLayer();
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paint.setDrawLooper(builder.detach());
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// the presence of the looper fools this predicate, so we think it might draw
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REPORTER_ASSERT(reporter, !paint.nothingToDraw());
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// Before fixing, this would assert in ~AutoDrawLooper() in SkCanvas.cpp as it checked for
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// a balance in the save/restore count after handling the looper. Before the fix, this
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// code would call nothingToDraw() and since it now clears the looper, that predicate will
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// return true, aborting the sequence prematurely, and not finishing the iterator on the looper
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// which handles the final "restore". This was a bug -- we *must* call the looper's iterator
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// until it returns done to keep the canvas balanced. The fix was to remove this early-exit
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// in the autodrawlooper. Now this call won't assert.
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// See https://skia-review.googlesource.com/c/skia/+/121220
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surf->getCanvas()->drawRect({1, 1, 10, 10}, paint);
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}
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