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555 lines
21 KiB
555 lines
21 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 "SkCanvas.h"
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#include "SkColorPriv.h"
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#include "SkColorShader.h"
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#include "SkGradientShader.h"
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#include "SkShader.h"
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#include "SkSurface.h"
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#include "SkTemplates.h"
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#include "SkTLazy.h"
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#include "Test.h"
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// https://code.google.com/p/chromium/issues/detail?id=448299
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// Giant (inverse) matrix causes overflow when converting/computing using 32.32
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// Before the fix, we would assert (and then crash).
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static void test_big_grad(skiatest::Reporter* reporter) {
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const SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
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const SkPoint pts[] = {{ 15, 14.7112684f }, { 0.709064007f, 12.6108112f }};
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
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SkShader::kClamp_TileMode));
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SkBitmap bm;
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bm.allocN32Pixels(2000, 1);
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SkCanvas c(bm);
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const SkScalar affine[] = {
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1.06608627e-06f, 4.26434525e-07f, 6.2855f, 2.6611f, 273.4393f, 244.0046f
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};
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SkMatrix matrix;
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matrix.setAffine(affine);
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c.concat(matrix);
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c.drawPaint(paint);
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}
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struct GradRec {
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int fColorCount;
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const SkColor* fColors;
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const SkScalar* fPos;
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const SkPoint* fPoint; // 2
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const SkScalar* fRadius; // 2
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SkShader::TileMode fTileMode;
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void gradCheck(skiatest::Reporter* reporter, const sk_sp<SkShader>& shader,
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SkShader::GradientInfo* info,
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SkShader::GradientType gt) const {
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SkAutoTMalloc<SkColor> colorStorage(fColorCount);
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SkAutoTMalloc<SkScalar> posStorage(fColorCount);
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info->fColorCount = fColorCount;
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info->fColors = colorStorage;
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info->fColorOffsets = posStorage.get();
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REPORTER_ASSERT(reporter, shader->asAGradient(info) == gt);
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REPORTER_ASSERT(reporter, info->fColorCount == fColorCount);
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REPORTER_ASSERT(reporter,
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!memcmp(info->fColors, fColors, fColorCount * sizeof(SkColor)));
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REPORTER_ASSERT(reporter,
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!memcmp(info->fColorOffsets, fPos, fColorCount * sizeof(SkScalar)));
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REPORTER_ASSERT(reporter, fTileMode == info->fTileMode);
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}
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};
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static void none_gradproc(skiatest::Reporter* reporter, const GradRec&, const GradRec&) {
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sk_sp<SkShader> s(SkShader::MakeEmptyShader());
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REPORTER_ASSERT(reporter, SkShader::kNone_GradientType == s->asAGradient(nullptr));
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}
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static void color_gradproc(skiatest::Reporter* reporter, const GradRec& rec, const GradRec&) {
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sk_sp<SkShader> s(new SkColorShader(rec.fColors[0]));
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REPORTER_ASSERT(reporter, SkShader::kColor_GradientType == s->asAGradient(nullptr));
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SkShader::GradientInfo info;
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info.fColors = nullptr;
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info.fColorCount = 0;
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s->asAGradient(&info);
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REPORTER_ASSERT(reporter, 1 == info.fColorCount);
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}
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static void linear_gradproc(skiatest::Reporter* reporter, const GradRec& buildRec,
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const GradRec& checkRec) {
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sk_sp<SkShader> s(SkGradientShader::MakeLinear(buildRec.fPoint, buildRec.fColors, buildRec.fPos,
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buildRec.fColorCount, buildRec.fTileMode));
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SkShader::GradientInfo info;
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checkRec.gradCheck(reporter, s, &info, SkShader::kLinear_GradientType);
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REPORTER_ASSERT(reporter, !memcmp(info.fPoint, checkRec.fPoint, 2 * sizeof(SkPoint)));
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}
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static void radial_gradproc(skiatest::Reporter* reporter, const GradRec& buildRec,
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const GradRec& checkRec) {
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sk_sp<SkShader> s(SkGradientShader::MakeRadial(buildRec.fPoint[0], buildRec.fRadius[0],
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buildRec.fColors, buildRec.fPos,
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buildRec.fColorCount, buildRec.fTileMode));
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SkShader::GradientInfo info;
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checkRec.gradCheck(reporter, s, &info, SkShader::kRadial_GradientType);
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REPORTER_ASSERT(reporter, info.fPoint[0] == checkRec.fPoint[0]);
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REPORTER_ASSERT(reporter, info.fRadius[0] == checkRec.fRadius[0]);
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}
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static void sweep_gradproc(skiatest::Reporter* reporter, const GradRec& buildRec,
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const GradRec& checkRec) {
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sk_sp<SkShader> s(SkGradientShader::MakeSweep(buildRec.fPoint[0].fX, buildRec.fPoint[0].fY,
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buildRec.fColors, buildRec.fPos,
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buildRec.fColorCount));
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SkShader::GradientInfo info;
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checkRec.gradCheck(reporter, s, &info, SkShader::kSweep_GradientType);
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REPORTER_ASSERT(reporter, info.fPoint[0] == checkRec.fPoint[0]);
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}
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static void conical_gradproc(skiatest::Reporter* reporter, const GradRec& buildRec,
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const GradRec& checkRec) {
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sk_sp<SkShader> s(SkGradientShader::MakeTwoPointConical(buildRec.fPoint[0],
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buildRec.fRadius[0],
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buildRec.fPoint[1],
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buildRec.fRadius[1],
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buildRec.fColors,
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buildRec.fPos,
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buildRec.fColorCount,
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buildRec.fTileMode));
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SkShader::GradientInfo info;
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checkRec.gradCheck(reporter, s, &info, SkShader::kConical_GradientType);
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REPORTER_ASSERT(reporter, !memcmp(info.fPoint, checkRec.fPoint, 2 * sizeof(SkPoint)));
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REPORTER_ASSERT(reporter, !memcmp(info.fRadius, checkRec.fRadius, 2 * sizeof(SkScalar)));
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}
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// Ensure that repeated color gradients behave like drawing a single color
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static void TestConstantGradient(skiatest::Reporter*) {
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const SkPoint pts[] = {
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{ 0, 0 },
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{ SkIntToScalar(10), 0 }
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};
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SkColor colors[] = { SK_ColorBLUE, SK_ColorBLUE };
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const SkScalar pos[] = { 0, SK_Scalar1 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, 2, SkShader::kClamp_TileMode));
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SkBitmap outBitmap;
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outBitmap.allocN32Pixels(10, 1);
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SkCanvas canvas(outBitmap);
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canvas.drawPaint(paint);
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for (int i = 0; i < 10; i++) {
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// The following is commented out because it currently fails
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// Related bug: https://code.google.com/p/skia/issues/detail?id=1098
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// REPORTER_ASSERT(reporter, SK_ColorBLUE == outBitmap.getColor(i, 0));
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}
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}
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typedef void (*GradProc)(skiatest::Reporter* reporter, const GradRec&, const GradRec&);
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static void TestGradientShaders(skiatest::Reporter* reporter) {
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static const SkColor gColors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
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static const SkScalar gPos[] = { 0, SK_ScalarHalf, SK_Scalar1 };
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static const SkPoint gPts[] = {
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{ 0, 0 },
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{ SkIntToScalar(10), SkIntToScalar(20) }
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};
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static const SkScalar gRad[] = { SkIntToScalar(1), SkIntToScalar(2) };
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GradRec rec;
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rec.fColorCount = SK_ARRAY_COUNT(gColors);
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rec.fColors = gColors;
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rec.fPos = gPos;
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rec.fPoint = gPts;
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rec.fRadius = gRad;
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rec.fTileMode = SkShader::kClamp_TileMode;
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static const GradProc gProcs[] = {
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none_gradproc,
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color_gradproc,
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linear_gradproc,
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radial_gradproc,
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sweep_gradproc,
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conical_gradproc,
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
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gProcs[i](reporter, rec, rec);
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}
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}
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static void TestGradientOptimization(skiatest::Reporter* reporter) {
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static const struct {
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GradProc fProc;
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bool fIsClampRestricted;
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} gProcInfo[] = {
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{ linear_gradproc , false },
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{ radial_gradproc , false },
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{ sweep_gradproc , true }, // sweep is funky in that it always pretends to be kClamp.
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{ conical_gradproc, false },
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};
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static const SkColor gC_00[] = { 0xff000000, 0xff000000 };
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static const SkColor gC_01[] = { 0xff000000, 0xffffffff };
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static const SkColor gC_11[] = { 0xffffffff, 0xffffffff };
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static const SkColor gC_001[] = { 0xff000000, 0xff000000, 0xffffffff };
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static const SkColor gC_011[] = { 0xff000000, 0xffffffff, 0xffffffff };
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static const SkColor gC_0011[] = { 0xff000000, 0xff000000, 0xffffffff, 0xffffffff };
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static const SkScalar gP_01[] = { 0, 1 };
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static const SkScalar gP_001[] = { 0, 0, 1 };
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static const SkScalar gP_011[] = { 0, 1, 1 };
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static const SkScalar gP_0x1[] = { 0, .5f, 1 };
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static const SkScalar gP_0011[] = { 0, 0, 1, 1 };
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static const SkPoint gPts[] = { {0, 0}, {1, 1} };
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static const SkScalar gRadii[] = { 1, 2 };
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static const struct {
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const SkColor* fCol;
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const SkScalar* fPos;
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int fCount;
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const SkColor* fExpectedCol;
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const SkScalar* fExpectedPos;
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int fExpectedCount;
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bool fRequiresNonClamp;
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} gTests[] = {
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{ gC_001, gP_001, 3, gC_01, gP_01, 2, false },
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{ gC_001, gP_011, 3, gC_00, gP_01, 2, true },
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{ gC_001, gP_0x1, 3, gC_001, gP_0x1, 3, false },
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{ gC_001, nullptr, 3, gC_001, gP_0x1, 3, false },
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{ gC_011, gP_001, 3, gC_11, gP_01, 2, true },
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{ gC_011, gP_011, 3, gC_01, gP_01, 2, false },
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{ gC_011, gP_0x1, 3, gC_011, gP_0x1, 3, false },
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{ gC_011, nullptr, 3, gC_011, gP_0x1, 3, false },
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{ gC_0011, gP_0011, 4, gC_0011, gP_0011, 4, false },
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};
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const SkShader::TileMode modes[] = {
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SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode,
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// TODO: add kDecal_TileMode when it is implemented
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gProcInfo); ++i) {
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for (auto mode : modes) {
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if (gProcInfo[i].fIsClampRestricted && mode != SkShader::kClamp_TileMode) {
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continue;
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}
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for (size_t t = 0; t < SK_ARRAY_COUNT(gTests); ++t) {
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GradRec rec;
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rec.fColorCount = gTests[t].fCount;
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rec.fColors = gTests[t].fCol;
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rec.fPos = gTests[t].fPos;
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rec.fTileMode = static_cast<SkShader::TileMode>(mode);
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rec.fPoint = gPts;
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rec.fRadius = gRadii;
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GradRec expected = rec;
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if (!gTests[t].fRequiresNonClamp || mode != SkShader::kClamp_TileMode) {
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expected.fColorCount = gTests[t].fExpectedCount;
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expected.fColors = gTests[t].fExpectedCol;
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expected.fPos = gTests[t].fExpectedPos;
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}
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gProcInfo[i].fProc(reporter, rec, expected);
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}
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}
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}
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}
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static void test_nearly_vertical(skiatest::Reporter* reporter) {
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auto surface(SkSurface::MakeRasterN32Premul(200, 200));
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const SkPoint pts[] = {{ 100, 50 }, { 100.0001f, 50000 }};
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const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
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const SkScalar pos[] = { 0, 1 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, 2, SkShader::kClamp_TileMode));
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surface->getCanvas()->drawPaint(paint);
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}
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static void test_vertical(skiatest::Reporter* reporter) {
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auto surface(SkSurface::MakeRasterN32Premul(200, 200));
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const SkPoint pts[] = {{ 100, 50 }, { 100, 50 }};
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const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
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const SkScalar pos[] = { 0, 1 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, 2, SkShader::kClamp_TileMode));
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surface->getCanvas()->drawPaint(paint);
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}
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// A linear gradient interval can, due to numerical imprecision (likely in the divide)
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// finish an interval with the final fx not landing outside of [p0...p1].
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// The old code had an assert which this test triggered.
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// We now explicitly clamp the resulting fx value.
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static void test_linear_fuzz(skiatest::Reporter* reporter) {
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auto surface(SkSurface::MakeRasterN32Premul(1300, 630));
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const SkPoint pts[] = {{ 179.5f, -179.5f }, { 1074.5f, 715.5f }};
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const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE };
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const SkScalar pos[] = {0, 0.200000003f, 0.800000012f, 1 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, 4, SkShader::kClamp_TileMode));
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SkRect r = {0, 83, 1254, 620};
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surface->getCanvas()->drawRect(r, paint);
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}
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// https://bugs.chromium.org/p/skia/issues/detail?id=5023
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// We should still shade pixels for which the radius is exactly 0.
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static void test_two_point_conical_zero_radius(skiatest::Reporter* reporter) {
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auto surface(SkSurface::MakeRasterN32Premul(5, 5));
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surface->getCanvas()->clear(SK_ColorRED);
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const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE };
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SkPaint p;
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p.setShader(SkGradientShader::MakeTwoPointConical(
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SkPoint::Make(2.5f, 2.5f), 0,
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SkPoint::Make(3.0f, 3.0f), 10,
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colors, nullptr, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
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surface->getCanvas()->drawPaint(p);
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// r == 0 for the center pixel.
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// verify that we draw it (no red bleed)
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SkPMColor centerPMColor;
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surface->readPixels(SkImageInfo::MakeN32Premul(1, 1), ¢erPMColor, sizeof(SkPMColor), 2, 2);
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REPORTER_ASSERT(reporter, SkGetPackedR32(centerPMColor) == 0);
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}
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// http://crbug.com/599458
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static void test_clamping_overflow(skiatest::Reporter*) {
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SkPaint p;
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const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN };
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const SkPoint pts1[] = { SkPoint::Make(1001, 1000001), SkPoint::Make(1000.99f, 1000000) };
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p.setShader(SkGradientShader::MakeLinear(pts1, colors, nullptr, 2, SkShader::kClamp_TileMode));
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sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(50, 50));
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surface->getCanvas()->scale(100, 100);
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surface->getCanvas()->drawPaint(p);
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const SkPoint pts2[] = { SkPoint::Make(10000.99f, 1000000), SkPoint::Make(10001, 1000001) };
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p.setShader(SkGradientShader::MakeLinear(pts2, colors, nullptr, 2, SkShader::kClamp_TileMode));
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surface->getCanvas()->drawPaint(p);
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// Passes if we don't trigger asserts.
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}
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// http://crbug.com/636194
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static void test_degenerate_linear(skiatest::Reporter*) {
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SkPaint p;
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const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN };
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const SkPoint pts[] = {
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SkPoint::Make(-46058024627067344430605278824628224.0f, 0),
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SkPoint::Make(SK_ScalarMax, 0)
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};
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p.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode));
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sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(50, 50));
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surface->getCanvas()->drawPaint(p);
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// Passes if we don't trigger asserts.
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}
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// "Interesting" fuzzer values.
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static void test_linear_fuzzer(skiatest::Reporter*) {
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static const SkColor gColors0[] = { 0x30303030, 0x30303030 };
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static const SkColor gColors1[] = { 0x30303030, 0x30303030, 0x30303030 };
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static const SkScalar gPos1[] = { 0, 0, 1 };
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static const SkScalar gMatrix0[9] = {
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6.40969056e-10f, 0 , 6.40969056e-10f,
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0 , 4.42539023e-39f, 6.40969056e-10f,
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0 , 0 , 1
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};
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static const SkScalar gMatrix1[9] = {
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-2.75294113f , 6.40969056e-10f, 6.40969056e-10f,
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6.40969056e-10f, 6.40969056e-10f, -3.32810161e+24f,
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6.40969056e-10f, 6.40969056e-10f, 0
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};
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static const SkScalar gMatrix2[9] = {
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7.93481258e+17f, 6.40969056e-10f, 6.40969056e-10f,
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6.40969056e-10f, 6.40969056e-10f, 6.40969056e-10f,
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6.40969056e-10f, 6.40969056e-10f, 0.688235283f
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};
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static const SkScalar gMatrix3[9] = {
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1.89180674e+11f, 6.40969056e-10f, 6.40969056e-10f,
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6.40969056e-10f, 6.40969056e-10f, 6.40969056e-10f,
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6.40969056e-10f, 11276.0469f , 8.12524808e+20f
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};
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static const struct {
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SkPoint fPts[2];
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const SkColor* fColors;
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const SkScalar* fPos;
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int fCount;
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SkShader::TileMode fTileMode;
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uint32_t fFlags;
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const SkScalar* fLocalMatrix;
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const SkScalar* fGlobalMatrix;
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} gConfigs[] = {
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{
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{{0, -2.752941f}, {0, 0}},
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gColors0,
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nullptr,
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SK_ARRAY_COUNT(gColors0),
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SkShader::kClamp_TileMode,
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0,
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gMatrix0,
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nullptr
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},
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{
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{{4.42539023e-39f, -4.42539023e-39f}, {9.78041162e-15f, 4.42539023e-39f}},
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gColors1,
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gPos1,
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SK_ARRAY_COUNT(gColors1),
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SkShader::kClamp_TileMode,
|
|
0,
|
|
nullptr,
|
|
gMatrix1
|
|
},
|
|
{
|
|
{{4.42539023e-39f, 6.40969056e-10f}, {6.40969056e-10f, 1.49237238e-19f}},
|
|
gColors1,
|
|
gPos1,
|
|
SK_ARRAY_COUNT(gColors1),
|
|
SkShader::kClamp_TileMode,
|
|
0,
|
|
nullptr,
|
|
gMatrix2
|
|
},
|
|
{
|
|
{{6.40969056e-10f, 6.40969056e-10f}, {6.40969056e-10f, -0.688235283f}},
|
|
gColors0,
|
|
nullptr,
|
|
SK_ARRAY_COUNT(gColors0),
|
|
SkShader::kClamp_TileMode,
|
|
0,
|
|
gMatrix3,
|
|
nullptr
|
|
},
|
|
};
|
|
|
|
sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
|
|
SkColorSpace* colorSpaces[] = {
|
|
nullptr, // hits the legacy gradient impl
|
|
srgb.get(), // triggers 4f/raster-pipeline
|
|
};
|
|
|
|
SkPaint paint;
|
|
|
|
for (auto colorSpace : colorSpaces) {
|
|
|
|
sk_sp<SkSurface> surface = SkSurface::MakeRaster(SkImageInfo::Make(100, 100,
|
|
kN32_SkColorType,
|
|
kPremul_SkAlphaType,
|
|
sk_ref_sp(colorSpace)));
|
|
SkCanvas* canvas = surface->getCanvas();
|
|
|
|
for (const auto& config : gConfigs) {
|
|
SkAutoCanvasRestore acr(canvas, false);
|
|
SkTLazy<SkMatrix> localMatrix;
|
|
if (config.fLocalMatrix) {
|
|
localMatrix.init();
|
|
localMatrix.get()->set9(config.fLocalMatrix);
|
|
}
|
|
|
|
paint.setShader(SkGradientShader::MakeLinear(config.fPts,
|
|
config.fColors,
|
|
config.fPos,
|
|
config.fCount,
|
|
config.fTileMode,
|
|
config.fFlags,
|
|
localMatrix.getMaybeNull()));
|
|
if (config.fGlobalMatrix) {
|
|
SkMatrix m;
|
|
m.set9(config.fGlobalMatrix);
|
|
canvas->save();
|
|
canvas->concat(m);
|
|
}
|
|
|
|
canvas->drawPaint(paint);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void test_sweep_fuzzer(skiatest::Reporter*) {
|
|
static const SkColor gColors0[] = { 0x30303030, 0x30303030, 0x30303030 };
|
|
static const SkScalar gPos0[] = { -47919293023455565225163489280.0f, 0, 1 };
|
|
static const SkScalar gMatrix0[9] = {
|
|
1.12116716e-13f, 0 , 8.50489682e+16f,
|
|
4.1917041e-41f , 3.51369881e-23f, -2.54344271e-26f,
|
|
9.61111907e+17f, -3.35263808e-29f, -1.35659403e+14f
|
|
};
|
|
static const struct {
|
|
SkPoint fCenter;
|
|
const SkColor* fColors;
|
|
const SkScalar* fPos;
|
|
int fCount;
|
|
const SkScalar* fGlobalMatrix;
|
|
} gConfigs[] = {
|
|
{
|
|
{ 0, 0 },
|
|
gColors0,
|
|
gPos0,
|
|
SK_ARRAY_COUNT(gColors0),
|
|
gMatrix0
|
|
},
|
|
};
|
|
|
|
sk_sp<SkSurface> surface = SkSurface::MakeRasterN32Premul(100, 100);
|
|
SkCanvas* canvas = surface->getCanvas();
|
|
SkPaint paint;
|
|
|
|
for (const auto& config : gConfigs) {
|
|
paint.setShader(SkGradientShader::MakeSweep(config.fCenter.x(),
|
|
config.fCenter.y(),
|
|
config.fColors,
|
|
config.fPos,
|
|
config.fCount));
|
|
|
|
SkAutoCanvasRestore acr(canvas, false);
|
|
if (config.fGlobalMatrix) {
|
|
SkMatrix m;
|
|
m.set9(config.fGlobalMatrix);
|
|
canvas->save();
|
|
canvas->concat(m);
|
|
}
|
|
canvas->drawPaint(paint);
|
|
}
|
|
}
|
|
|
|
DEF_TEST(Gradient, reporter) {
|
|
TestGradientShaders(reporter);
|
|
TestGradientOptimization(reporter);
|
|
TestConstantGradient(reporter);
|
|
test_big_grad(reporter);
|
|
test_nearly_vertical(reporter);
|
|
test_vertical(reporter);
|
|
test_linear_fuzz(reporter);
|
|
test_two_point_conical_zero_radius(reporter);
|
|
test_clamping_overflow(reporter);
|
|
test_degenerate_linear(reporter);
|
|
test_linear_fuzzer(reporter);
|
|
test_sweep_fuzzer(reporter);
|
|
}
|