221 lines
8.9 KiB
C++
221 lines
8.9 KiB
C++
/*
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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 "SkColorShader.h"
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#include "SkGradientShader.h"
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#include "SkShader.h"
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#include "SkTemplates.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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SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
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SkPaint paint;
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paint.setShader(s)->unref();
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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, 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&) {
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SkAutoTUnref<SkShader> s(SkShader::CreateEmptyShader());
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REPORTER_ASSERT(reporter, SkShader::kNone_GradientType == s->asAGradient(NULL));
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}
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static void color_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
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SkAutoTUnref<SkShader> s(new SkColorShader(rec.fColors[0]));
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REPORTER_ASSERT(reporter, SkShader::kColor_GradientType == s->asAGradient(NULL));
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SkShader::GradientInfo info;
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info.fColors = NULL;
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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& rec) {
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateLinear(rec.fPoint,
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rec.fColors,
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rec.fPos,
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rec.fColorCount,
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rec.fTileMode));
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SkShader::GradientInfo info;
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rec.gradCheck(reporter, s, &info, SkShader::kLinear_GradientType);
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REPORTER_ASSERT(reporter, !memcmp(info.fPoint, rec.fPoint, 2 * sizeof(SkPoint)));
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}
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static void radial_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial(rec.fPoint[0],
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rec.fRadius[0],
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rec.fColors,
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rec.fPos,
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rec.fColorCount,
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rec.fTileMode));
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SkShader::GradientInfo info;
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rec.gradCheck(reporter, s, &info, SkShader::kRadial_GradientType);
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REPORTER_ASSERT(reporter, info.fPoint[0] == rec.fPoint[0]);
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REPORTER_ASSERT(reporter, info.fRadius[0] == rec.fRadius[0]);
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}
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static void radial2_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateTwoPointRadial(rec.fPoint[0],
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rec.fRadius[0],
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rec.fPoint[1],
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rec.fRadius[1],
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rec.fColors,
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rec.fPos,
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rec.fColorCount,
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rec.fTileMode));
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SkShader::GradientInfo info;
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rec.gradCheck(reporter, s, &info, SkShader::kRadial2_GradientType);
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REPORTER_ASSERT(reporter, !memcmp(info.fPoint, rec.fPoint, 2 * sizeof(SkPoint)));
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REPORTER_ASSERT(reporter, !memcmp(info.fRadius, rec.fRadius, 2 * sizeof(SkScalar)));
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}
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static void sweep_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateSweep(rec.fPoint[0].fX,
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rec.fPoint[0].fY,
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rec.fColors,
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rec.fPos,
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rec.fColorCount));
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SkShader::GradientInfo info;
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rec.gradCheck(reporter, s, &info, SkShader::kSweep_GradientType);
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REPORTER_ASSERT(reporter, info.fPoint[0] == rec.fPoint[0]);
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}
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static void conical_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateTwoPointConical(rec.fPoint[0],
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rec.fRadius[0],
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rec.fPoint[1],
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rec.fRadius[1],
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rec.fColors,
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rec.fPos,
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rec.fColorCount,
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rec.fTileMode));
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SkShader::GradientInfo info;
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rec.gradCheck(reporter, s, &info, SkShader::kConical_GradientType);
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REPORTER_ASSERT(reporter, !memcmp(info.fPoint, rec.fPoint, 2 * sizeof(SkPoint)));
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REPORTER_ASSERT(reporter, !memcmp(info.fRadius, rec.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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SkAutoTUnref<SkShader> s(SkGradientShader::CreateLinear(pts,
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colors,
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pos,
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2,
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SkShader::kClamp_TileMode));
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SkBitmap outBitmap;
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outBitmap.allocN32Pixels(10, 1);
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SkPaint paint;
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paint.setShader(s.get());
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SkCanvas canvas(outBitmap);
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canvas.drawPaint(paint);
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SkAutoLockPixels alp(outBitmap);
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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&);
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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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radial2_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);
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}
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}
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DEF_TEST(Gradient, reporter) {
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TestGradientShaders(reporter);
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TestConstantGradient(reporter);
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test_big_grad(reporter);
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}
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