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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkRect.h"
#include "SkRectPriv.h"
#include "Test.h"
static bool has_green_pixels(const SkBitmap& bm) {
for (int j = 0; j < bm.height(); ++j) {
for (int i = 0; i < bm.width(); ++i) {
if (SkColorGetG(bm.getColor(i, j))) {
return true;
}
}
}
return false;
}
static void test_stroke_width_clipping(skiatest::Reporter* reporter) {
SkBitmap bm;
bm.allocN32Pixels(100, 10);
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(10);
paint.setColor(0xff00ff00);
// clip out the left half of our canvas
canvas.clipRect(SkRect::MakeXYWH(51, 0, 49, 100));
// no stroke bleed should be visible
canvas.drawRect(SkRect::MakeWH(44, 100), paint);
REPORTER_ASSERT(reporter, !has_green_pixels(bm));
// right stroke edge should bleed into the visible area
canvas.scale(2, 2);
canvas.drawRect(SkRect::MakeWH(22, 50), paint);
REPORTER_ASSERT(reporter, has_green_pixels(bm));
}
static void test_skbug4406(skiatest::Reporter* reporter) {
SkBitmap bm;
bm.allocN32Pixels(10, 10);
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
const SkRect r = { 1.5f, 1, 3.5f, 3 };
// draw filled green rect first
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(0xff00ff00);
paint.setStrokeWidth(1);
paint.setAntiAlias(true);
canvas.drawRect(r, paint);
// paint black with stroke rect (that asserts in bug 4406)
// over the filled rect, it should cover it
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xff000000);
paint.setStrokeWidth(1);
canvas.drawRect(r, paint);
REPORTER_ASSERT(reporter, !has_green_pixels(bm));
// do it again with thinner stroke
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(0xff00ff00);
paint.setStrokeWidth(1);
paint.setAntiAlias(true);
canvas.drawRect(r, paint);
// paint black with stroke rect (that asserts in bug 4406)
// over the filled rect, it doesnt cover it completelly with thinner stroke
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xff000000);
paint.setStrokeWidth(0.99f);
canvas.drawRect(r, paint);
REPORTER_ASSERT(reporter, has_green_pixels(bm));
}
DEF_TEST(Rect, reporter) {
test_stroke_width_clipping(reporter);
test_skbug4406(reporter);
}
DEF_TEST(Rect_grow, reporter) {
test_stroke_width_clipping(reporter);
test_skbug4406(reporter);
}
DEF_TEST(Rect_path_nan, reporter) {
SkRect r = { 0, 0, SK_ScalarNaN, 100 };
SkPath p;
p.addRect(r);
// path normally just jams its bounds to be r, but it must notice that r is non-finite
REPORTER_ASSERT(reporter, !p.isFinite());
}
DEF_TEST(Rect_largest, reporter) {
REPORTER_ASSERT(reporter, !SkRectPriv::MakeILarge().isEmpty());
REPORTER_ASSERT(reporter, SkRectPriv::MakeILargestInverted().isEmpty());
REPORTER_ASSERT(reporter, !SkRectPriv::MakeLargest().isEmpty());
REPORTER_ASSERT(reporter, !SkRectPriv::MakeLargeS32().isEmpty());
REPORTER_ASSERT(reporter, SkRectPriv::MakeLargestInverted().isEmpty());
}
/*
* Test the setBounds always handles non-finite values correctly:
* - setBoundsCheck should return false, and set the rect to all zeros
* - setBoundsNoCheck should ensure that rect.isFinite() is false (definitely NOT all zeros)
*/
DEF_TEST(Rect_setbounds, reporter) {
const SkPoint p0[] = { { SK_ScalarInfinity, 0 }, { 1, 1 }, { 2, 2 }, { 3, 3 } };
const SkPoint p1[] = { { 0, SK_ScalarInfinity }, { 1, 1 }, { 2, 2 }, { 3, 3 } };
const SkPoint p2[] = { { SK_ScalarNaN, 0 }, { 1, 1 }, { 2, 2 }, { 3, 3 } };
const SkPoint p3[] = { { 0, SK_ScalarNaN }, { 1, 1 }, { 2, 2 }, { 3, 3 } };
SkRect r;
const SkRect zeror = { 0, 0, 0, 0 };
for (const SkPoint* pts : { p0, p1, p2, p3 }) {
for (int n = 1; n <= 4; ++n) {
bool isfinite = r.setBoundsCheck(pts, n);
REPORTER_ASSERT(reporter, !isfinite);
REPORTER_ASSERT(reporter, r == zeror);
r.setBoundsNoCheck(pts, n);
if (r.isFinite())
r.setBoundsNoCheck(pts, n);
REPORTER_ASSERT(reporter, !r.isFinite());
}
}
}
static float make_big_value(skiatest::Reporter* reporter) {
// need to make a big value, one that will cause rect.width() to overflow to inf.
// however, the windows compiler wants about this if it can see the big value inlined.
// hence, this stupid trick to try to fool their compiler.
SkASSERT(reporter);
return reporter ? SK_ScalarMax * 0.75f : 0;
}
DEF_TEST(Rect_center, reporter) {
// ensure we can compute center even when the width/height might overflow
const SkScalar big = make_big_value(reporter);
const SkRect r = { -big, -big, big, big };
REPORTER_ASSERT(reporter, r.isFinite());
REPORTER_ASSERT(reporter, SkScalarIsFinite(r.centerX()));
REPORTER_ASSERT(reporter, SkScalarIsFinite(r.centerY()));
REPORTER_ASSERT(reporter, !SkScalarIsFinite(r.width()));
REPORTER_ASSERT(reporter, !SkScalarIsFinite(r.height()));
}
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