1 /*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "Test.h"
9 #include "TestClassDef.h"
10 #include "SkBlurMask.h"
11 #include "SkBlurMaskFilter.h"
12 #include "SkLayerDrawLooper.h"
13 #include "SkPath.h"
14 #include "SkPaint.h"
15 #include "SkRandom.h"
16 #include "SkTypeface.h"
17 #include "SkUtils.h"
18
uni_to_utf8(const SkUnichar src[],void * dst,int count)19 static size_t uni_to_utf8(const SkUnichar src[], void* dst, int count) {
20 char* u8 = (char*)dst;
21 for (int i = 0; i < count; ++i) {
22 int n = SkUTF8_FromUnichar(src[i], u8);
23 u8 += n;
24 }
25 return u8 - (char*)dst;
26 }
27
uni_to_utf16(const SkUnichar src[],void * dst,int count)28 static size_t uni_to_utf16(const SkUnichar src[], void* dst, int count) {
29 uint16_t* u16 = (uint16_t*)dst;
30 for (int i = 0; i < count; ++i) {
31 int n = SkUTF16_FromUnichar(src[i], u16);
32 u16 += n;
33 }
34 return (char*)u16 - (char*)dst;
35 }
36
uni_to_utf32(const SkUnichar src[],void * dst,int count)37 static size_t uni_to_utf32(const SkUnichar src[], void* dst, int count) {
38 SkUnichar* u32 = (SkUnichar*)dst;
39 if (src != u32) {
40 memcpy(u32, src, count * sizeof(SkUnichar));
41 }
42 return count * sizeof(SkUnichar);
43 }
44
paint2encoding(const SkPaint & paint)45 static SkTypeface::Encoding paint2encoding(const SkPaint& paint) {
46 SkPaint::TextEncoding enc = paint.getTextEncoding();
47 SkASSERT(SkPaint::kGlyphID_TextEncoding != enc);
48 return (SkTypeface::Encoding)enc;
49 }
50
find_first_zero(const uint16_t glyphs[],int count)51 static int find_first_zero(const uint16_t glyphs[], int count) {
52 for (int i = 0; i < count; ++i) {
53 if (0 == glyphs[i]) {
54 return i;
55 }
56 }
57 return count;
58 }
59
test_cmap(skiatest::Reporter * reporter)60 static void test_cmap(skiatest::Reporter* reporter) {
61 static const int NGLYPHS = 64;
62
63 SkUnichar src[NGLYPHS];
64 SkUnichar dst[NGLYPHS]; // used for utf8, utf16, utf32 storage
65
66 static const struct {
67 size_t (*fSeedTextProc)(const SkUnichar[], void* dst, int count);
68 SkPaint::TextEncoding fEncoding;
69 } gRec[] = {
70 { uni_to_utf8, SkPaint::kUTF8_TextEncoding },
71 { uni_to_utf16, SkPaint::kUTF16_TextEncoding },
72 { uni_to_utf32, SkPaint::kUTF32_TextEncoding },
73 };
74
75 SkRandom rand;
76 SkPaint paint;
77 paint.setTypeface(SkTypeface::RefDefault())->unref();
78 SkTypeface* face = paint.getTypeface();
79
80 for (int i = 0; i < 1000; ++i) {
81 // generate some random text
82 for (int j = 0; j < NGLYPHS; ++j) {
83 src[j] = ' ' + j;
84 }
85 // inject some random chars, to sometimes abort early
86 src[rand.nextU() & 63] = rand.nextU() & 0xFFF;
87
88 for (size_t k = 0; k < SK_ARRAY_COUNT(gRec); ++k) {
89 paint.setTextEncoding(gRec[k].fEncoding);
90
91 size_t len = gRec[k].fSeedTextProc(src, dst, NGLYPHS);
92
93 uint16_t glyphs0[NGLYPHS], glyphs1[NGLYPHS];
94
95 bool contains = paint.containsText(dst, len);
96 int nglyphs = paint.textToGlyphs(dst, len, glyphs0);
97 int first = face->charsToGlyphs(dst, paint2encoding(paint), glyphs1, NGLYPHS);
98 int index = find_first_zero(glyphs1, NGLYPHS);
99
100 REPORTER_ASSERT(reporter, NGLYPHS == nglyphs);
101 REPORTER_ASSERT(reporter, index == first);
102 REPORTER_ASSERT(reporter,
103 !memcmp(glyphs0, glyphs1, NGLYPHS * sizeof(uint16_t)));
104 if (contains) {
105 REPORTER_ASSERT(reporter, NGLYPHS == first);
106 } else {
107 REPORTER_ASSERT(reporter, NGLYPHS > first);
108 }
109 }
110 }
111 }
112
113 // temparary api for bicubic, just be sure we can set/clear it
test_filterlevel(skiatest::Reporter * reporter)114 static void test_filterlevel(skiatest::Reporter* reporter) {
115 SkPaint p0, p1;
116
117 REPORTER_ASSERT(reporter,
118 SkPaint::kNone_FilterLevel == p0.getFilterLevel());
119
120 static const SkPaint::FilterLevel gLevels[] = {
121 SkPaint::kNone_FilterLevel,
122 SkPaint::kLow_FilterLevel,
123 SkPaint::kMedium_FilterLevel,
124 SkPaint::kHigh_FilterLevel
125 };
126 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevels); ++i) {
127 p0.setFilterLevel(gLevels[i]);
128 REPORTER_ASSERT(reporter, gLevels[i] == p0.getFilterLevel());
129 p1 = p0;
130 REPORTER_ASSERT(reporter, gLevels[i] == p1.getFilterLevel());
131
132 p0.reset();
133 REPORTER_ASSERT(reporter,
134 SkPaint::kNone_FilterLevel == p0.getFilterLevel());
135 }
136 }
137
test_copy(skiatest::Reporter * reporter)138 static void test_copy(skiatest::Reporter* reporter) {
139 SkPaint paint;
140 // set a few member variables
141 paint.setStyle(SkPaint::kStrokeAndFill_Style);
142 paint.setTextAlign(SkPaint::kLeft_Align);
143 paint.setStrokeWidth(SkIntToScalar(2));
144 // set a few pointers
145 SkLayerDrawLooper* looper = new SkLayerDrawLooper();
146 paint.setLooper(looper)->unref();
147 SkMaskFilter* mask = SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
148 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)));
149 paint.setMaskFilter(mask)->unref();
150
151 // copy the paint using the copy constructor and check they are the same
152 SkPaint copiedPaint = paint;
153 REPORTER_ASSERT(reporter, paint == copiedPaint);
154
155 #ifdef SK_BUILD_FOR_ANDROID
156 // the copy constructor should preserve the Generation ID
157 uint32_t paintGenID = paint.getGenerationID();
158 uint32_t copiedPaintGenID = copiedPaint.getGenerationID();
159 REPORTER_ASSERT(reporter, paintGenID == copiedPaintGenID);
160 REPORTER_ASSERT(reporter, !memcmp(&paint, &copiedPaint, sizeof(paint)));
161 #endif
162
163 // copy the paint using the equal operator and check they are the same
164 copiedPaint = paint;
165 REPORTER_ASSERT(reporter, paint == copiedPaint);
166
167 #ifdef SK_BUILD_FOR_ANDROID
168 // the equals operator should increment the Generation ID
169 REPORTER_ASSERT(reporter, paint.getGenerationID() == paintGenID);
170 REPORTER_ASSERT(reporter, copiedPaint.getGenerationID() != copiedPaintGenID);
171 copiedPaintGenID = copiedPaint.getGenerationID(); // reset to the new value
172 REPORTER_ASSERT(reporter, memcmp(&paint, &copiedPaint, sizeof(paint)));
173 #endif
174
175 // clean the paint and check they are back to their initial states
176 SkPaint cleanPaint;
177 paint.reset();
178 copiedPaint.reset();
179 REPORTER_ASSERT(reporter, cleanPaint == paint);
180 REPORTER_ASSERT(reporter, cleanPaint == copiedPaint);
181
182 #ifdef SK_BUILD_FOR_ANDROID
183 // the reset function should increment the Generation ID
184 REPORTER_ASSERT(reporter, paint.getGenerationID() != paintGenID);
185 REPORTER_ASSERT(reporter, copiedPaint.getGenerationID() != copiedPaintGenID);
186 REPORTER_ASSERT(reporter, memcmp(&cleanPaint, &paint, sizeof(cleanPaint)));
187 REPORTER_ASSERT(reporter, memcmp(&cleanPaint, &copiedPaint, sizeof(cleanPaint)));
188 #endif
189 }
190
191 // found and fixed for webkit: mishandling when we hit recursion limit on
192 // mostly degenerate cubic flatness test
regression_cubic(skiatest::Reporter * reporter)193 static void regression_cubic(skiatest::Reporter* reporter) {
194 SkPath path, stroke;
195 SkPaint paint;
196
197 path.moveTo(460.2881309415525f,
198 303.250847066498f);
199 path.cubicTo(463.36378422175284f,
200 302.1169735073363f,
201 456.32239330810046f,
202 304.720354932878f,
203 453.15255460013304f,
204 305.788586869862f);
205
206 SkRect fillR, strokeR;
207 fillR = path.getBounds();
208
209 paint.setStyle(SkPaint::kStroke_Style);
210 paint.setStrokeWidth(SkIntToScalar(2));
211 paint.getFillPath(path, &stroke);
212 strokeR = stroke.getBounds();
213
214 SkRect maxR = fillR;
215 SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
216 SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
217 SkScalarMul(paint.getStrokeWidth(), miter) :
218 paint.getStrokeWidth();
219 maxR.inset(-inset, -inset);
220
221 // test that our stroke didn't explode
222 REPORTER_ASSERT(reporter, maxR.contains(strokeR));
223 }
224
225 // found and fixed for android: not initializing rect for string's of length 0
regression_measureText(skiatest::Reporter * reporter)226 static void regression_measureText(skiatest::Reporter* reporter) {
227
228 SkPaint paint;
229 paint.setTextSize(12.0f);
230
231 SkRect r;
232 r.setLTRB(SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN);
233
234 // test that the rect was reset
235 paint.measureText("", 0, &r, 1.0f);
236 REPORTER_ASSERT(reporter, r.isEmpty());
237 }
238
DEF_TEST(Paint,reporter)239 DEF_TEST(Paint, reporter) {
240 // TODO add general paint tests
241 test_copy(reporter);
242
243 // regression tests
244 regression_cubic(reporter);
245 regression_measureText(reporter);
246
247 test_filterlevel(reporter);
248
249 // need to implement charsToGlyphs on other backends (e.g. linux, win)
250 // before we can run this tests everywhere
251 if (false) {
252 test_cmap(reporter);
253 }
254 }
255