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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 "Test.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkMath.h"
#include "SkPaint.h"
#include "SkRandom.h"
///////////////////////////////////////////////////////////////////////////////
#define ILLEGAL_MODE ((SkXfermode::Mode)-1)
static const int outset = 100;
static const SkColor bgColor = SK_ColorWHITE;
static const int strokeWidth = 4;
static void create(SkBitmap* bm, SkIRect bound, SkBitmap::Config config) {
bm->setConfig(config, bound.width(), bound.height());
bm->allocPixels();
}
static void drawBG(SkCanvas* canvas) {
canvas->drawColor(bgColor);
}
struct BlurTest {
void (*addPath)(SkPath*);
int viewLen;
SkIRect views[9];
};
//Path Draw Procs
//Beware that paths themselves my draw differently depending on the clip.
static void draw50x50Rect(SkPath* path) {
path->addRect(0, 0, SkIntToScalar(50), SkIntToScalar(50));
}
//Tests
static BlurTest tests[] = {
{ draw50x50Rect, 3, {
//inner half of blur
{ 0, 0, 50, 50 },
//blur, but no path.
{ 50 + strokeWidth/2, 50 + strokeWidth/2, 100, 100 },
//just an edge
{ 40, strokeWidth, 60, 50 - strokeWidth },
}},
};
/** Assumes that the ref draw was completely inside ref canvas --
implies that everything outside is "bgColor".
Checks that all overlap is the same and that all non-overlap on the
ref is "bgColor".
*/
static bool compare(const SkBitmap& ref, const SkIRect& iref,
const SkBitmap& test, const SkIRect& itest)
{
const int xOff = itest.fLeft - iref.fLeft;
const int yOff = itest.fTop - iref.fTop;
SkAutoLockPixels alpRef(ref);
SkAutoLockPixels alpTest(test);
for (int y = 0; y < test.height(); ++y) {
for (int x = 0; x < test.width(); ++x) {
SkColor testColor = test.getColor(x, y);
int refX = x + xOff;
int refY = y + yOff;
SkColor refColor;
if (refX >= 0 && refX < ref.width() &&
refY >= 0 && refY < ref.height())
{
refColor = ref.getColor(refX, refY);
} else {
refColor = bgColor;
}
if (refColor != testColor) {
return false;
}
}
}
return true;
}
static void test_blur(skiatest::Reporter* reporter) {
SkPaint paint;
paint.setColor(SK_ColorGRAY);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(strokeWidth));
SkScalar radius = SkIntToScalar(5);
for (int style = 0; style < SkBlurMaskFilter::kBlurStyleCount; ++style) {
SkBlurMaskFilter::BlurStyle blurStyle =
static_cast<SkBlurMaskFilter::BlurStyle>(style);
const uint32_t flagPermutations = SkBlurMaskFilter::kAll_BlurFlag;
for (uint32_t flags = 0; flags < flagPermutations; ++flags) {
SkMaskFilter* filter;
filter = SkBlurMaskFilter::Create(radius, blurStyle, flags);
SkMaskFilter::BlurInfo info;
sk_bzero(&info, sizeof(info));
SkMaskFilter::BlurType type = filter->asABlur(&info);
REPORTER_ASSERT(reporter, type ==
static_cast<SkMaskFilter::BlurType>(style + 1));
REPORTER_ASSERT(reporter, info.fRadius == radius);
REPORTER_ASSERT(reporter, info.fIgnoreTransform ==
SkToBool(flags & SkBlurMaskFilter::kIgnoreTransform_BlurFlag));
REPORTER_ASSERT(reporter, info.fHighQuality ==
SkToBool(flags & SkBlurMaskFilter::kHighQuality_BlurFlag));
paint.setMaskFilter(filter);
filter->unref();
for (size_t test = 0; test < SK_ARRAY_COUNT(tests); ++test) {
SkPath path;
tests[test].addPath(&path);
SkPath strokedPath;
paint.getFillPath(path, &strokedPath);
SkRect refBound = strokedPath.getBounds();
SkIRect iref;
refBound.roundOut(&iref);
iref.inset(-outset, -outset);
SkBitmap refBitmap;
create(&refBitmap, iref, SkBitmap::kARGB_8888_Config);
SkCanvas refCanvas(refBitmap);
refCanvas.translate(SkIntToScalar(-iref.fLeft),
SkIntToScalar(-iref.fTop));
drawBG(&refCanvas);
refCanvas.drawPath(path, paint);
for (int view = 0; view < tests[test].viewLen; ++view) {
SkIRect itest = tests[test].views[view];
SkBitmap testBitmap;
create(&testBitmap, itest, SkBitmap::kARGB_8888_Config);
SkCanvas testCanvas(testBitmap);
testCanvas.translate(SkIntToScalar(-itest.fLeft),
SkIntToScalar(-itest.fTop));
drawBG(&testCanvas);
testCanvas.drawPath(path, paint);
REPORTER_ASSERT(reporter,
compare(refBitmap, iref, testBitmap, itest));
}
}
}
}
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("BlurMaskFilter", BlurTestClass, test_blur)
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