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skia2/tests/PaintTest.cpp

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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 "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkLayerDrawLooper.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkReadBuffer.h"
#include "SkTypeface.h"
#include "SkUtils.h"
#include "SkWriteBuffer.h"
#include "SkXfermode.h"
#include "Test.h"
static size_t uni_to_utf8(const SkUnichar src[], void* dst, int count) {
char* u8 = (char*)dst;
for (int i = 0; i < count; ++i) {
int n = SkToInt(SkUTF8_FromUnichar(src[i], u8));
u8 += n;
}
return u8 - (char*)dst;
}
static size_t uni_to_utf16(const SkUnichar src[], void* dst, int count) {
uint16_t* u16 = (uint16_t*)dst;
for (int i = 0; i < count; ++i) {
int n = SkToInt(SkUTF16_FromUnichar(src[i], u16));
u16 += n;
}
return (char*)u16 - (char*)dst;
}
static size_t uni_to_utf32(const SkUnichar src[], void* dst, int count) {
SkUnichar* u32 = (SkUnichar*)dst;
if (src != u32) {
memcpy(u32, src, count * sizeof(SkUnichar));
}
return count * sizeof(SkUnichar);
}
static SkTypeface::Encoding paint2encoding(const SkPaint& paint) {
SkPaint::TextEncoding enc = paint.getTextEncoding();
SkASSERT(SkPaint::kGlyphID_TextEncoding != enc);
return (SkTypeface::Encoding)enc;
}
static int find_first_zero(const uint16_t glyphs[], int count) {
for (int i = 0; i < count; ++i) {
if (0 == glyphs[i]) {
return i;
}
}
return count;
}
DEF_TEST(Paint_cmap, reporter) {
// need to implement charsToGlyphs on other backends (e.g. linux, win)
// before we can run this tests everywhere
return;
static const int NGLYPHS = 64;
SkUnichar src[NGLYPHS];
SkUnichar dst[NGLYPHS]; // used for utf8, utf16, utf32 storage
static const struct {
size_t (*fSeedTextProc)(const SkUnichar[], void* dst, int count);
SkPaint::TextEncoding fEncoding;
} gRec[] = {
{ uni_to_utf8, SkPaint::kUTF8_TextEncoding },
{ uni_to_utf16, SkPaint::kUTF16_TextEncoding },
{ uni_to_utf32, SkPaint::kUTF32_TextEncoding },
};
SkRandom rand;
SkPaint paint;
paint.setTypeface(SkTypeface::RefDefault())->unref();
SkTypeface* face = paint.getTypeface();
for (int i = 0; i < 1000; ++i) {
// generate some random text
for (int j = 0; j < NGLYPHS; ++j) {
src[j] = ' ' + j;
}
// inject some random chars, to sometimes abort early
src[rand.nextU() & 63] = rand.nextU() & 0xFFF;
for (size_t k = 0; k < SK_ARRAY_COUNT(gRec); ++k) {
paint.setTextEncoding(gRec[k].fEncoding);
size_t len = gRec[k].fSeedTextProc(src, dst, NGLYPHS);
uint16_t glyphs0[NGLYPHS], glyphs1[NGLYPHS];
bool contains = paint.containsText(dst, len);
int nglyphs = paint.textToGlyphs(dst, len, glyphs0);
int first = face->charsToGlyphs(dst, paint2encoding(paint), glyphs1, NGLYPHS);
int index = find_first_zero(glyphs1, NGLYPHS);
REPORTER_ASSERT(reporter, NGLYPHS == nglyphs);
REPORTER_ASSERT(reporter, index == first);
REPORTER_ASSERT(reporter, 0 == memcmp(glyphs0, glyphs1, NGLYPHS * sizeof(uint16_t)));
if (contains) {
REPORTER_ASSERT(reporter, NGLYPHS == first);
} else {
REPORTER_ASSERT(reporter, NGLYPHS > first);
}
}
}
}
// temparary api for bicubic, just be sure we can set/clear it
DEF_TEST(Paint_filterQuality, reporter) {
SkPaint p0, p1;
REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
static const SkFilterQuality gQualitys[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
p0.setFilterQuality(gQualitys[i]);
REPORTER_ASSERT(reporter, gQualitys[i] == p0.getFilterQuality());
p1 = p0;
REPORTER_ASSERT(reporter, gQualitys[i] == p1.getFilterQuality());
p0.reset();
REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
}
}
DEF_TEST(Paint_copy, reporter) {
SkPaint paint;
// set a few member variables
paint.setStyle(SkPaint::kStrokeAndFill_Style);
paint.setTextAlign(SkPaint::kLeft_Align);
paint.setStrokeWidth(SkIntToScalar(2));
// set a few pointers
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper* looper = looperBuilder.detachLooper();
paint.setLooper(looper)->unref();
SkMaskFilter* mask = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)));
paint.setMaskFilter(mask)->unref();
// copy the paint using the copy constructor and check they are the same
SkPaint copiedPaint = paint;
REPORTER_ASSERT(reporter, paint == copiedPaint);
// copy the paint using the equal operator and check they are the same
copiedPaint = paint;
REPORTER_ASSERT(reporter, paint == copiedPaint);
// clean the paint and check they are back to their initial states
SkPaint cleanPaint;
paint.reset();
copiedPaint.reset();
REPORTER_ASSERT(reporter, cleanPaint == paint);
REPORTER_ASSERT(reporter, cleanPaint == copiedPaint);
}
// found and fixed for webkit: mishandling when we hit recursion limit on
// mostly degenerate cubic flatness test
DEF_TEST(Paint_regression_cubic, reporter) {
SkPath path, stroke;
SkPaint paint;
path.moveTo(460.2881309415525f,
303.250847066498f);
path.cubicTo(463.36378422175284f,
302.1169735073363f,
456.32239330810046f,
304.720354932878f,
453.15255460013304f,
305.788586869862f);
SkRect fillR, strokeR;
fillR = path.getBounds();
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(2));
paint.getFillPath(path, &stroke);
strokeR = stroke.getBounds();
SkRect maxR = fillR;
SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
SkScalarMul(paint.getStrokeWidth(), miter) :
paint.getStrokeWidth();
maxR.inset(-inset, -inset);
// test that our stroke didn't explode
REPORTER_ASSERT(reporter, maxR.contains(strokeR));
}
DEF_TEST(Paint_flattening, reporter) {
const SkFilterQuality levels[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality,
};
const SkPaint::Hinting hinting[] = {
SkPaint::kNo_Hinting,
SkPaint::kSlight_Hinting,
SkPaint::kNormal_Hinting,
SkPaint::kFull_Hinting,
};
const SkPaint::Align align[] = {
SkPaint::kLeft_Align,
SkPaint::kCenter_Align,
SkPaint::kRight_Align
};
const SkPaint::Cap caps[] = {
SkPaint::kButt_Cap,
SkPaint::kRound_Cap,
SkPaint::kSquare_Cap,
};
const SkPaint::Join joins[] = {
SkPaint::kMiter_Join,
SkPaint::kRound_Join,
SkPaint::kBevel_Join,
};
const SkPaint::TextEncoding encodings[] = {
SkPaint::kUTF8_TextEncoding,
SkPaint::kUTF16_TextEncoding,
SkPaint::kUTF32_TextEncoding,
SkPaint::kGlyphID_TextEncoding,
};
const SkPaint::Style styles[] = {
SkPaint::kFill_Style,
SkPaint::kStroke_Style,
SkPaint::kStrokeAndFill_Style,
};
#define FOR_SETUP(index, array, setter) \
for (size_t index = 0; index < SK_ARRAY_COUNT(array); ++index) { \
paint.setter(array[index]); \
SkPaint paint;
paint.setFlags(0x1234);
FOR_SETUP(i, levels, setFilterQuality)
FOR_SETUP(j, hinting, setHinting)
FOR_SETUP(k, align, setTextAlign)
FOR_SETUP(l, caps, setStrokeCap)
FOR_SETUP(m, joins, setStrokeJoin)
FOR_SETUP(n, encodings, setTextEncoding)
FOR_SETUP(p, styles, setStyle)
SkWriteBuffer writer;
paint.flatten(writer);
const uint32_t* written = writer.getWriter32()->contiguousArray();
SkReadBuffer reader(written, writer.bytesWritten());
SkPaint paint2;
paint2.unflatten(reader);
REPORTER_ASSERT(reporter, paint2 == paint);
}}}}}}}
#undef FOR_SETUP
}
// found and fixed for android: not initializing rect for string's of length 0
DEF_TEST(Paint_regression_measureText, reporter) {
SkPaint paint;
paint.setTextSize(12.0f);
SkRect r;
r.setLTRB(SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN);
// test that the rect was reset
paint.measureText("", 0, &r);
REPORTER_ASSERT(reporter, r.isEmpty());
}
#define ASSERT(expr) REPORTER_ASSERT(r, expr)
DEF_TEST(Paint_MoreFlattening, r) {
SkPaint paint;
paint.setColor(0x00AABBCC);
paint.setTextScaleX(1.0f); // Default value, ignored.
paint.setTextSize(19);
paint.setXfermode(SkXfermode::Create(SkXfermode::kModulate_Mode))->unref();
paint.setLooper(NULL); // Default value, ignored.
SkWriteBuffer writer;
paint.flatten(writer);
SkReadBuffer reader(writer.getWriter32()->contiguousArray(), writer.bytesWritten());
SkPaint other;
other.unflatten(reader);
ASSERT(reader.offset() == writer.bytesWritten());
// No matter the encoding, these must always hold.
ASSERT(other.getColor() == paint.getColor());
ASSERT(other.getTextScaleX() == paint.getTextScaleX());
ASSERT(other.getTextSize() == paint.getTextSize());
ASSERT(other.getLooper() == paint.getLooper());
// We have to be a little looser and compare just the modes. Pointers might not be the same.
SkXfermode::Mode otherMode, paintMode;
ASSERT(other.getXfermode()->asMode(&otherMode));
ASSERT(paint.getXfermode()->asMode(&paintMode));
ASSERT(otherMode == paintMode);
}
DEF_TEST(Paint_getHash, r) {
// Try not to inspect the actual hash values in here.
// We might want to change the hash function.
SkPaint paint;
const uint32_t defaultHash = paint.getHash();
// Check that some arbitrary field affects the hash.
paint.setColor(0xFF00FF00);
REPORTER_ASSERT(r, paint.getHash() != defaultHash);
paint.setColor(SK_ColorBLACK); // Reset to default value.
REPORTER_ASSERT(r, paint.getHash() == defaultHash);
// SkTypeface is the first field we hash, so test it specially.
paint.setTypeface(SkTypeface::RefDefault())->unref();
REPORTER_ASSERT(r, paint.getHash() != defaultHash);
paint.setTypeface(NULL);
REPORTER_ASSERT(r, paint.getHash() == defaultHash);
// This is part of fBitfields, the last field we hash.
paint.setHinting(SkPaint::kSlight_Hinting);
REPORTER_ASSERT(r, paint.getHash() != defaultHash);
paint.setHinting(SkPaint::kNormal_Hinting);
REPORTER_ASSERT(r, paint.getHash() == defaultHash);
}
#include "SkColorMatrixFilter.h"
DEF_TEST(Paint_nothingToDraw, r) {
SkPaint paint;
REPORTER_ASSERT(r, !paint.nothingToDraw());
paint.setAlpha(0);
REPORTER_ASSERT(r, paint.nothingToDraw());
paint.setAlpha(0xFF);
paint.setXfermodeMode(SkXfermode::kDst_Mode);
REPORTER_ASSERT(r, paint.nothingToDraw());
paint.setAlpha(0);
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
SkColorMatrix cm;
cm.setIdentity(); // does not change alpha
paint.setColorFilter(SkColorMatrixFilter::Create(cm))->unref();
REPORTER_ASSERT(r, paint.nothingToDraw());
cm.postTranslate(0, 0, 0, 1); // wacks alpha
paint.setColorFilter(SkColorMatrixFilter::Create(cm))->unref();
REPORTER_ASSERT(r, !paint.nothingToDraw());
}
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