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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "Test.h"
      9 #include "SkPath.h"
     10 #include "SkPaint.h"
     11 #include "SkLayerDrawLooper.h"
     12 #include "SkBlurMaskFilter.h"
     13 
     14 static void test_copy(skiatest::Reporter* reporter) {
     15     SkPaint paint;
     16     // set a few member variables
     17     paint.setStyle(SkPaint::kStrokeAndFill_Style);
     18     paint.setTextAlign(SkPaint::kLeft_Align);
     19     paint.setStrokeWidth(SkIntToScalar(2));
     20     // set a few pointers
     21     SkLayerDrawLooper* looper = new SkLayerDrawLooper();
     22     paint.setLooper(looper)->unref();
     23     SkMaskFilter* mask = SkBlurMaskFilter::Create(1, SkBlurMaskFilter::kNormal_BlurStyle);
     24     paint.setMaskFilter(mask)->unref();
     25 
     26     // copy the paint using the copy constructor and check they are the same
     27     SkPaint copiedPaint = paint;
     28     REPORTER_ASSERT(reporter, paint == copiedPaint);
     29 
     30 #ifdef SK_BUILD_FOR_ANDROID
     31     // the copy constructor should preserve the Generation ID
     32     int32_t paintGenID = paint.getGenerationID();
     33     int32_t copiedPaintGenID = copiedPaint.getGenerationID();
     34     REPORTER_ASSERT(reporter, paintGenID == copiedPaintGenID);
     35     REPORTER_ASSERT(reporter, !memcmp(&paint, &copiedPaint, sizeof(paint)));
     36 #endif
     37 
     38     // copy the paint using the equal operator and check they are the same
     39     copiedPaint = paint;
     40     REPORTER_ASSERT(reporter, paint == copiedPaint);
     41 
     42 #ifdef SK_BUILD_FOR_ANDROID
     43     // the equals operator should increment the Generation ID
     44     REPORTER_ASSERT(reporter, paint.getGenerationID() == paintGenID);
     45     REPORTER_ASSERT(reporter, copiedPaint.getGenerationID() != copiedPaintGenID);
     46     copiedPaintGenID = copiedPaint.getGenerationID(); // reset to the new value
     47     REPORTER_ASSERT(reporter, memcmp(&paint, &copiedPaint, sizeof(paint)));
     48 #endif
     49 
     50     // clean the paint and check they are back to their initial states
     51     SkPaint cleanPaint;
     52     paint.reset();
     53     copiedPaint.reset();
     54     REPORTER_ASSERT(reporter, cleanPaint == paint);
     55     REPORTER_ASSERT(reporter, cleanPaint == copiedPaint);
     56 
     57 #ifdef SK_BUILD_FOR_ANDROID
     58     // the reset function should increment the Generation ID
     59     REPORTER_ASSERT(reporter, paint.getGenerationID() != paintGenID);
     60     REPORTER_ASSERT(reporter, copiedPaint.getGenerationID() != copiedPaintGenID);
     61     REPORTER_ASSERT(reporter, memcmp(&cleanPaint, &paint, sizeof(cleanPaint)));
     62     REPORTER_ASSERT(reporter, memcmp(&cleanPaint, &copiedPaint, sizeof(cleanPaint)));
     63 #endif
     64 }
     65 
     66 // found and fixed for webkit: mishandling when we hit recursion limit on
     67 // mostly degenerate cubic flatness test
     68 static void regression_cubic(skiatest::Reporter* reporter) {
     69     SkPath path, stroke;
     70     SkPaint paint;
     71 
     72     path.moveTo(SkFloatToScalar(460.2881309415525f),
     73                 SkFloatToScalar(303.250847066498f));
     74     path.cubicTo(SkFloatToScalar(463.36378422175284f),
     75                  SkFloatToScalar(302.1169735073363f),
     76                  SkFloatToScalar(456.32239330810046f),
     77                  SkFloatToScalar(304.720354932878f),
     78                  SkFloatToScalar(453.15255460013304f),
     79                  SkFloatToScalar(305.788586869862f));
     80 
     81     SkRect fillR, strokeR;
     82     fillR = path.getBounds();
     83 
     84     paint.setStyle(SkPaint::kStroke_Style);
     85     paint.setStrokeWidth(SkIntToScalar(2));
     86     paint.getFillPath(path, &stroke);
     87     strokeR = stroke.getBounds();
     88 
     89     SkRect maxR = fillR;
     90     SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
     91     SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
     92                             SkScalarMul(paint.getStrokeWidth(), miter) :
     93                             paint.getStrokeWidth();
     94     maxR.inset(-inset, -inset);
     95 
     96     // test that our stroke didn't explode
     97     REPORTER_ASSERT(reporter, maxR.contains(strokeR));
     98 }
     99 
    100 static void TestPaint(skiatest::Reporter* reporter) {
    101     // TODO add general paint tests
    102     test_copy(reporter);
    103 
    104     // regression tests
    105     regression_cubic(reporter);
    106 }
    107 
    108 #include "TestClassDef.h"
    109 DEFINE_TESTCLASS("Paint", TestPaintClass, TestPaint)
    110