Paint.cpp revision e21e2a2d1d85d422230c1115abba824338763a88 
1/* libs/android_runtime/android/graphics/Paint.cpp
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "Paint"
19
20#include <utils/Log.h>
21
22#include "jni.h"
23#include "GraphicsJNI.h"
24#include <android_runtime/AndroidRuntime.h>
25#include <ScopedUtfChars.h>
26
27#include "SkBlurDrawLooper.h"
28#include "SkColorFilter.h"
29#include "SkMaskFilter.h"
30#include "SkRasterizer.h"
31#include "SkShader.h"
32#include "SkTypeface.h"
33#include "SkXfermode.h"
34#include "unicode/uloc.h"
35#include "unicode/ushape.h"
36#include "utils/Blur.h"
37
38#include <minikin/GraphemeBreak.h>
39#include "MinikinSkia.h"
40#include "MinikinUtils.h"
41#include "Paint.h"
42#include "TypefaceImpl.h"
43
44// temporary for debugging
45#include <Caches.h>
46#include <utils/Log.h>
47
48namespace android {
49
50struct JMetricsID {
51    jfieldID    top;
52    jfieldID    ascent;
53    jfieldID    descent;
54    jfieldID    bottom;
55    jfieldID    leading;
56};
57
58static jclass   gFontMetrics_class;
59static JMetricsID gFontMetrics_fieldID;
60
61static jclass   gFontMetricsInt_class;
62static JMetricsID gFontMetricsInt_fieldID;
63
64static void defaultSettingsForAndroid(Paint* paint) {
65    // GlyphID encoding is required because we are using Harfbuzz shaping
66    paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
67
68    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
69    paintOpts.setUseFontFallbacks(true);
70    paint->setPaintOptionsAndroid(paintOpts);
71}
72
73class PaintGlue {
74public:
75    enum MoveOpt {
76        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
77    };
78
79    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
80        Paint* obj = reinterpret_cast<Paint*>(objHandle);
81        delete obj;
82    }
83
84    static jlong init(JNIEnv* env, jobject clazz) {
85        Paint* obj = new Paint();
86        defaultSettingsForAndroid(obj);
87        return reinterpret_cast<jlong>(obj);
88    }
89
90    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
91        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
92        Paint* obj = new Paint(*paint);
93        return reinterpret_cast<jlong>(obj);
94    }
95
96    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
97        Paint* obj = reinterpret_cast<Paint*>(objHandle);
98        obj->reset();
99        defaultSettingsForAndroid(obj);
100    }
101
102    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
103        Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle);
104        const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle);
105        *dst = *src;
106    }
107
108    // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
109    static const uint32_t sFilterBitmapFlag = 0x02;
110
111    static jint getFlags(JNIEnv* env, jobject paint) {
112        NPE_CHECK_RETURN_ZERO(env, paint);
113        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
114        uint32_t result = nativePaint->getFlags();
115        result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away.
116        if (nativePaint->getFilterLevel() != Paint::kNone_FilterLevel) {
117            result |= sFilterBitmapFlag;
118        }
119        return static_cast<jint>(result);
120    }
121
122    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
123        NPE_CHECK_RETURN_VOID(env, paint);
124        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
125        // Instead of modifying 0x02, change the filter level.
126        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
127                ? Paint::kLow_FilterLevel
128                : Paint::kNone_FilterLevel);
129        // Don't pass through filter flag, which is no longer stored in paint's flags.
130        flags &= ~sFilterBitmapFlag;
131        // Use the existing value for 0x02.
132        const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag;
133        flags |= existing0x02Flag;
134        nativePaint->setFlags(flags);
135    }
136
137    static jint getHinting(JNIEnv* env, jobject paint) {
138        NPE_CHECK_RETURN_ZERO(env, paint);
139        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
140                == Paint::kNo_Hinting ? 0 : 1;
141    }
142
143    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
144        NPE_CHECK_RETURN_VOID(env, paint);
145        GraphicsJNI::getNativePaint(env, paint)->setHinting(
146                mode == 0 ? Paint::kNo_Hinting : Paint::kNormal_Hinting);
147    }
148
149    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
150        NPE_CHECK_RETURN_VOID(env, paint);
151        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
152    }
153
154    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
155        NPE_CHECK_RETURN_VOID(env, paint);
156        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
157    }
158
159    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
160        NPE_CHECK_RETURN_VOID(env, paint);
161        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
162    }
163
164    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
165        NPE_CHECK_RETURN_VOID(env, paint);
166        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
167    }
168
169    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
170        NPE_CHECK_RETURN_VOID(env, paint);
171        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
172    }
173
174    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
175        NPE_CHECK_RETURN_VOID(env, paint);
176        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
177    }
178
179    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
180        NPE_CHECK_RETURN_VOID(env, paint);
181        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
182                filterBitmap ? Paint::kLow_FilterLevel : Paint::kNone_FilterLevel);
183    }
184
185    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
186        NPE_CHECK_RETURN_VOID(env, paint);
187        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
188    }
189
190    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
191        Paint* obj = reinterpret_cast<Paint*>(objHandle);
192        return static_cast<jint>(obj->getStyle());
193    }
194
195    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
196        Paint* obj = reinterpret_cast<Paint*>(objHandle);
197        Paint::Style style = static_cast<Paint::Style>(styleHandle);
198        obj->setStyle(style);
199    }
200
201    static jint getColor(JNIEnv* env, jobject paint) {
202        NPE_CHECK_RETURN_ZERO(env, paint);
203        int color;
204        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
205        return static_cast<jint>(color);
206    }
207
208    static jint getAlpha(JNIEnv* env, jobject paint) {
209        NPE_CHECK_RETURN_ZERO(env, paint);
210        int alpha;
211        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
212        return static_cast<jint>(alpha);
213    }
214
215    static void setColor(JNIEnv* env, jobject paint, jint color) {
216        NPE_CHECK_RETURN_VOID(env, paint);
217        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
218    }
219
220    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
221        NPE_CHECK_RETURN_VOID(env, paint);
222        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
223    }
224
225    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
226        NPE_CHECK_RETURN_ZERO(env, paint);
227        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
228    }
229
230    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
231        NPE_CHECK_RETURN_VOID(env, paint);
232        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
233    }
234
235    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
236        NPE_CHECK_RETURN_ZERO(env, paint);
237        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
238    }
239
240    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
241        NPE_CHECK_RETURN_VOID(env, paint);
242        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
243    }
244
245    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
246        Paint* obj = reinterpret_cast<Paint*>(objHandle);
247        return static_cast<jint>(obj->getStrokeCap());
248    }
249
250    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
251        Paint* obj = reinterpret_cast<Paint*>(objHandle);
252        Paint::Cap cap = static_cast<Paint::Cap>(capHandle);
253        obj->setStrokeCap(cap);
254    }
255
256    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
257        Paint* obj = reinterpret_cast<Paint*>(objHandle);
258        return static_cast<jint>(obj->getStrokeJoin());
259    }
260
261    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
262        Paint* obj = reinterpret_cast<Paint*>(objHandle);
263        Paint::Join join = (Paint::Join) joinHandle;
264        obj->setStrokeJoin(join);
265    }
266
267    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
268        Paint* obj = reinterpret_cast<Paint*>(objHandle);
269        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
270        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
271        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
272    }
273
274    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
275        Paint* obj = reinterpret_cast<Paint*>(objHandle);
276        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
277        return reinterpret_cast<jlong>(obj->setShader(shader));
278    }
279
280    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
281        Paint* obj = reinterpret_cast<Paint *>(objHandle);
282        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
283        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
284    }
285
286    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
287        Paint* obj = reinterpret_cast<Paint*>(objHandle);
288        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
289        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
290    }
291
292    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
293        Paint* obj = reinterpret_cast<Paint*>(objHandle);
294        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
295        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
296    }
297
298    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
299        Paint* obj = reinterpret_cast<Paint*>(objHandle);
300        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
301        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
302    }
303
304    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
305        // TODO: in Paint refactoring, set typeface on android Paint, not Paint
306        return NULL;
307    }
308
309    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
310        Paint* obj = reinterpret_cast<Paint*>(objHandle);
311        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
312        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
313    }
314
315    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
316        Paint* obj = reinterpret_cast<Paint*>(objHandle);
317        return static_cast<jint>(obj->getTextAlign());
318    }
319
320    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
321        Paint* obj = reinterpret_cast<Paint*>(objHandle);
322        Paint::Align align = static_cast<Paint::Align>(alignHandle);
323        obj->setTextAlign(align);
324    }
325
326    // generate bcp47 identifier for the supplied locale
327    static void toLanguageTag(char* output, size_t outSize,
328            const char* locale) {
329        if (output == NULL || outSize <= 0) {
330            return;
331        }
332        if (locale == NULL) {
333            output[0] = '\0';
334            return;
335        }
336        char canonicalChars[ULOC_FULLNAME_CAPACITY];
337        UErrorCode uErr = U_ZERO_ERROR;
338        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
339                &uErr);
340        if (U_SUCCESS(uErr)) {
341            char likelyChars[ULOC_FULLNAME_CAPACITY];
342            uErr = U_ZERO_ERROR;
343            uloc_addLikelySubtags(canonicalChars, likelyChars,
344                    ULOC_FULLNAME_CAPACITY, &uErr);
345            if (U_SUCCESS(uErr)) {
346                uErr = U_ZERO_ERROR;
347                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
348                if (U_SUCCESS(uErr)) {
349                    return;
350                } else {
351                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
352                            u_errorName(uErr));
353                }
354            } else {
355                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
356                        canonicalChars, u_errorName(uErr));
357            }
358        } else {
359            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
360                    u_errorName(uErr));
361        }
362        // unable to build a proper language identifier
363        output[0] = '\0';
364    }
365
366    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
367        Paint* obj = reinterpret_cast<Paint*>(objHandle);
368        ScopedUtfChars localeChars(env, locale);
369        char langTag[ULOC_FULLNAME_CAPACITY];
370        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
371
372        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
373        paintOpts.setLanguage(langTag);
374        obj->setPaintOptionsAndroid(paintOpts);
375    }
376
377    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
378        NPE_CHECK_RETURN_ZERO(env, paint);
379        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
380        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
381        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
382    }
383
384    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
385        NPE_CHECK_RETURN_VOID(env, paint);
386        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
387        SkPaintOptionsAndroid::FontVariant variant =
388            aa ? SkPaintOptionsAndroid::kElegant_Variant :
389            SkPaintOptionsAndroid::kDefault_Variant;
390        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
391        paintOpts.setFontVariant(variant);
392        obj->setPaintOptionsAndroid(paintOpts);
393    }
394
395    static jfloat getTextSize(JNIEnv* env, jobject paint) {
396        NPE_CHECK_RETURN_ZERO(env, paint);
397        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
398    }
399
400    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
401        NPE_CHECK_RETURN_VOID(env, paint);
402        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
403    }
404
405    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
406        NPE_CHECK_RETURN_ZERO(env, paint);
407        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
408    }
409
410    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
411        NPE_CHECK_RETURN_VOID(env, paint);
412        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
413    }
414
415    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
416        NPE_CHECK_RETURN_ZERO(env, paint);
417        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
418    }
419
420    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
421        NPE_CHECK_RETURN_VOID(env, paint);
422        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
423    }
424
425    static jfloat getLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle) {
426        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
427        return paint->getLetterSpacing();
428    }
429
430    static void setLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat letterSpacing) {
431        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
432        paint->setLetterSpacing(letterSpacing);
433    }
434
435    static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, Paint::FontMetrics *metrics) {
436        const int kElegantTop = 2500;
437        const int kElegantBottom = -1000;
438        const int kElegantAscent = 1900;
439        const int kElegantDescent = -500;
440        const int kElegantLeading = 0;
441        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
442        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
443        typeface = TypefaceImpl_resolveDefault(typeface);
444        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
445        float saveSkewX = paint->getTextSkewX();
446        bool savefakeBold = paint->isFakeBoldText();
447        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
448        SkScalar spacing = paint->getFontMetrics(metrics);
449        // The populateSkPaint call may have changed fake bold / text skew
450        // because we want to measure with those effects applied, so now
451        // restore the original settings.
452        paint->setTextSkewX(saveSkewX);
453        paint->setFakeBoldText(savefakeBold);
454        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
455        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
456            SkScalar size = paint->getTextSize();
457            metrics->fTop = -size * kElegantTop / 2048;
458            metrics->fBottom = -size * kElegantBottom / 2048;
459            metrics->fAscent = -size * kElegantAscent / 2048;
460            metrics->fDescent = -size * kElegantDescent / 2048;
461            metrics->fLeading = size * kElegantLeading / 2048;
462            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
463        }
464        return spacing;
465    }
466
467    static jfloat ascent(JNIEnv* env, jobject paint) {
468        NPE_CHECK_RETURN_ZERO(env, paint);
469        Paint::FontMetrics metrics;
470        getMetricsInternal(env, paint, &metrics);
471        return SkScalarToFloat(metrics.fAscent);
472    }
473
474    static jfloat descent(JNIEnv* env, jobject paint) {
475        NPE_CHECK_RETURN_ZERO(env, paint);
476        Paint::FontMetrics metrics;
477        getMetricsInternal(env, paint, &metrics);
478        return SkScalarToFloat(metrics.fDescent);
479    }
480
481    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
482        NPE_CHECK_RETURN_ZERO(env, paint);
483        Paint::FontMetrics metrics;
484        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
485
486        if (metricsObj) {
487            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
488            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
489            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
490            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
491            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
492            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
493        }
494        return SkScalarToFloat(spacing);
495    }
496
497    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
498        NPE_CHECK_RETURN_ZERO(env, paint);
499        Paint::FontMetrics metrics;
500
501        getMetricsInternal(env, paint, &metrics);
502        int ascent = SkScalarRoundToInt(metrics.fAscent);
503        int descent = SkScalarRoundToInt(metrics.fDescent);
504        int leading = SkScalarRoundToInt(metrics.fLeading);
505
506        if (metricsObj) {
507            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
508            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
509            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
510            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
511            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
512            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
513        }
514        return descent - ascent + leading;
515    }
516
517    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
518            jint bidiFlags) {
519        NPE_CHECK_RETURN_ZERO(env, jpaint);
520        NPE_CHECK_RETURN_ZERO(env, text);
521
522        size_t textLength = env->GetArrayLength(text);
523        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
524            doThrowAIOOBE(env);
525            return 0;
526        }
527        if (count == 0) {
528            return 0;
529        }
530
531        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
532        const jchar* textArray = env->GetCharArrayElements(text, NULL);
533        jfloat result = 0;
534
535        Layout layout;
536        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
537        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, index, count, textLength);
538        result = layout.getAdvance();
539        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
540        return result;
541    }
542
543    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
544            jint bidiFlags) {
545        NPE_CHECK_RETURN_ZERO(env, jpaint);
546        NPE_CHECK_RETURN_ZERO(env, text);
547
548        size_t textLength = env->GetStringLength(text);
549        int count = end - start;
550        if ((start | count) < 0 || (size_t)end > textLength) {
551            doThrowAIOOBE(env);
552            return 0;
553        }
554        if (count == 0) {
555            return 0;
556        }
557
558        const jchar* textArray = env->GetStringChars(text, NULL);
559        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
560        jfloat width = 0;
561
562        Layout layout;
563        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
564        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, start, count, textLength);
565        width = layout.getAdvance();
566
567        env->ReleaseStringChars(text, textArray);
568        return width;
569    }
570
571    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
572        NPE_CHECK_RETURN_ZERO(env, jpaint);
573        NPE_CHECK_RETURN_ZERO(env, text);
574
575        size_t textLength = env->GetStringLength(text);
576        if (textLength == 0) {
577            return 0;
578        }
579
580        const jchar* textArray = env->GetStringChars(text, NULL);
581        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
582        jfloat width = 0;
583
584        Layout layout;
585        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
586        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, 0, textLength, textLength);
587        width = layout.getAdvance();
588
589        env->ReleaseStringChars(text, textArray);
590        return width;
591    }
592
593    static int dotextwidths(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar text[], int count,
594            jfloatArray widths, jint bidiFlags) {
595        NPE_CHECK_RETURN_ZERO(env, paint);
596        NPE_CHECK_RETURN_ZERO(env, text);
597
598        if (count < 0 || !widths) {
599            doThrowAIOOBE(env);
600            return 0;
601        }
602        if (count == 0) {
603            return 0;
604        }
605        size_t widthsLength = env->GetArrayLength(widths);
606        if ((size_t)count > widthsLength) {
607            doThrowAIOOBE(env);
608            return 0;
609        }
610
611        AutoJavaFloatArray autoWidths(env, widths, count);
612        jfloat* widthsArray = autoWidths.ptr();
613
614        Layout layout;
615        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
616        layout.getAdvances(widthsArray);
617
618        return count;
619    }
620
621    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
622            jint index, jint count, jint bidiFlags, jfloatArray widths) {
623        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
624        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
625        const jchar* textArray = env->GetCharArrayElements(text, NULL);
626        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
627        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
628                                      JNI_ABORT);
629        return count;
630    }
631
632    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
633            jint start, jint end, jint bidiFlags, jfloatArray widths) {
634        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
635        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
636        const jchar* textArray = env->GetStringChars(text, NULL);
637        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
638        env->ReleaseStringChars(text, textArray);
639        return count;
640    }
641
642    static jfloat doTextRunAdvances(JNIEnv *env, Paint *paint, TypefaceImpl* typeface, const jchar *text,
643                                    jint start, jint count, jint contextCount, jboolean isRtl,
644                                    jfloatArray advances, jint advancesIndex) {
645        NPE_CHECK_RETURN_ZERO(env, paint);
646        NPE_CHECK_RETURN_ZERO(env, text);
647
648        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
649            doThrowAIOOBE(env);
650            return 0;
651        }
652        if (count == 0) {
653            return 0;
654        }
655        if (advances) {
656            size_t advancesLength = env->GetArrayLength(advances);
657            if ((size_t)count > advancesLength) {
658                doThrowAIOOBE(env);
659                return 0;
660            }
661        }
662        jfloat* advancesArray = new jfloat[count];
663        jfloat totalAdvance = 0;
664
665        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
666
667        Layout layout;
668        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, start, count, contextCount);
669        layout.getAdvances(advancesArray);
670        totalAdvance = layout.getAdvance();
671
672        if (advances != NULL) {
673            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
674        }
675        delete [] advancesArray;
676        return totalAdvance;
677    }
678
679    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
680            jlong typefaceHandle,
681            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
682            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
683        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
684        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
685        jchar* textArray = env->GetCharArrayElements(text, NULL);
686        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
687                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
688        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
689        return result;
690    }
691
692    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
693            jlong typefaceHandle,
694            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
695            jfloatArray advances, jint advancesIndex) {
696        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
697        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
698        const jchar* textArray = env->GetStringChars(text, NULL);
699        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
700                start - contextStart, end - start, contextEnd - contextStart, isRtl,
701                advances, advancesIndex);
702        env->ReleaseStringChars(text, textArray);
703        return result;
704    }
705
706    static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start,
707            jint count, jint flags, jint offset, jint opt) {
708        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
709        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
710        return static_cast<jint>(result);
711    }
712
713    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
714            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
715        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
716        jchar* textArray = env->GetCharArrayElements(text, NULL);
717        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
718                offset, cursorOpt);
719        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
720        return result;
721    }
722
723    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
724            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
725        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
726        const jchar* textArray = env->GetStringChars(text, NULL);
727        jint result = doTextRunCursor(env, paint, textArray, contextStart,
728                contextEnd - contextStart, dir, offset, cursorOpt);
729        env->ReleaseStringChars(text, textArray);
730        return result;
731    }
732
733    class GetTextFunctor {
734    public:
735        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint,
736                    uint16_t* glyphs, SkPoint* pos)
737                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
738        }
739
740        void operator()(size_t start, size_t end) {
741            for (size_t i = start; i < end; i++) {
742                glyphs[i] = layout.getGlyphId(i);
743                pos[i].fX = x + layout.getX(i);
744                pos[i].fY = y + layout.getY(i);
745            }
746            if (start == 0) {
747                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
748            } else {
749                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
750                path->addPath(tmpPath);
751            }
752        }
753    private:
754        const Layout& layout;
755        SkPath* path;
756        jfloat x;
757        jfloat y;
758        Paint* paint;
759        uint16_t* glyphs;
760        SkPoint* pos;
761        SkPath tmpPath;
762    };
763
764    static void getTextPath(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar* text,
765            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
766        Layout layout;
767        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
768        size_t nGlyphs = layout.nGlyphs();
769        uint16_t* glyphs = new uint16_t[nGlyphs];
770        SkPoint* pos = new SkPoint[nGlyphs];
771
772        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
773        Paint::Align align = paint->getTextAlign();
774        paint->setTextAlign(Paint::kLeft_Align);
775        paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
776        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
777        MinikinUtils::forFontRun(layout, paint, f);
778        paint->setTextAlign(align);
779        delete[] glyphs;
780        delete[] pos;
781    }
782
783    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
784            jlong typefaceHandle, jint bidiFlags,
785            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
786        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
787        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
788        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
789        const jchar* textArray = env->GetCharArrayElements(text, NULL);
790        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
791        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
792    }
793
794    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
795            jlong typefaceHandle, jint bidiFlags,
796            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
797        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
798        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
799        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
800        const jchar* textArray = env->GetStringChars(text, NULL);
801        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
802        env->ReleaseStringChars(text, textArray);
803    }
804
805    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
806                               jfloat dx, jfloat dy, jint color) {
807        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
808        if (radius <= 0) {
809            paint->setLooper(NULL);
810        }
811        else {
812            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
813            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
814        }
815    }
816
817    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
818        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
819        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
820    }
821
822    static int breakText(JNIEnv* env, const Paint& paint, TypefaceImpl* typeface, const jchar text[],
823                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
824                         Paint::TextBufferDirection textBufferDirection) {
825        size_t measuredCount = 0;
826        float measured = 0;
827
828        Layout layout;
829        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
830        float* advances = new float[count];
831        layout.getAdvances(advances);
832        const bool forwardScan = (textBufferDirection == Paint::kForward_TextBufferDirection);
833        for (int i = 0; i < count; i++) {
834            // traverse in the given direction
835            int index = forwardScan ? i : (count - i - 1);
836            float width = advances[index];
837            if (measured + width > maxWidth) {
838                break;
839            }
840            // properly handle clusters when scanning backwards
841            if (forwardScan || width != 0.0f) {
842                measuredCount = i + 1;
843            }
844            measured += width;
845        }
846        delete[] advances;
847
848        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
849            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
850            jfloat* array = autoMeasured.ptr();
851            array[0] = measured;
852        }
853        return measuredCount;
854    }
855
856    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
857            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
858        NPE_CHECK_RETURN_ZERO(env, jtext);
859
860        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
861        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
862
863        Paint::TextBufferDirection tbd;
864        if (count < 0) {
865            tbd = Paint::kBackward_TextBufferDirection;
866            count = -count;
867        }
868        else {
869            tbd = Paint::kForward_TextBufferDirection;
870        }
871
872        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
873            doThrowAIOOBE(env);
874            return 0;
875        }
876
877        const jchar* text = env->GetCharArrayElements(jtext, NULL);
878        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
879                          bidiFlags, jmeasuredWidth, tbd);
880        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
881                                      JNI_ABORT);
882        return count;
883    }
884
885    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
886                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
887        NPE_CHECK_RETURN_ZERO(env, jtext);
888
889        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
890        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
891
892        Paint::TextBufferDirection tbd = forwards ?
893                                        Paint::kForward_TextBufferDirection :
894                                        Paint::kBackward_TextBufferDirection;
895
896        int count = env->GetStringLength(jtext);
897        const jchar* text = env->GetStringChars(jtext, NULL);
898        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
899        env->ReleaseStringChars(jtext, text);
900        return count;
901    }
902
903    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
904            const Paint& paint, TypefaceImpl* typeface, jint bidiFlags) {
905        SkRect  r;
906        SkIRect ir;
907
908        Layout layout;
909        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
910        MinikinRect rect;
911        layout.getBounds(&rect);
912        r.fLeft = rect.mLeft;
913        r.fTop = rect.mTop;
914        r.fRight = rect.mRight;
915        r.fBottom = rect.mBottom;
916        r.roundOut(&ir);
917        GraphicsJNI::irect_to_jrect(ir, env, bounds);
918    }
919
920    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
921                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
922        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);;
923        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
924        const jchar* textArray = env->GetStringChars(text, NULL);
925        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
926        env->ReleaseStringChars(text, textArray);
927    }
928
929    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
930                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
931        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
932        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
933        const jchar* textArray = env->GetCharArrayElements(text, NULL);
934        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
935        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
936                                      JNI_ABORT);
937    }
938
939};
940
941static JNINativeMethod methods[] = {
942    {"finalizer", "(J)V", (void*) PaintGlue::finalizer},
943    {"native_init","()J", (void*) PaintGlue::init},
944    {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint},
945    {"native_reset","(J)V", (void*) PaintGlue::reset},
946    {"native_set","(JJ)V", (void*) PaintGlue::assign},
947    {"getFlags","()I", (void*) PaintGlue::getFlags},
948    {"setFlags","(I)V", (void*) PaintGlue::setFlags},
949    {"getHinting","()I", (void*) PaintGlue::getHinting},
950    {"setHinting","(I)V", (void*) PaintGlue::setHinting},
951    {"setAntiAlias","(Z)V", (void*) PaintGlue::setAntiAlias},
952    {"setSubpixelText","(Z)V", (void*) PaintGlue::setSubpixelText},
953    {"setLinearText","(Z)V", (void*) PaintGlue::setLinearText},
954    {"setUnderlineText","(Z)V", (void*) PaintGlue::setUnderlineText},
955    {"setStrikeThruText","(Z)V", (void*) PaintGlue::setStrikeThruText},
956    {"setFakeBoldText","(Z)V", (void*) PaintGlue::setFakeBoldText},
957    {"setFilterBitmap","(Z)V", (void*) PaintGlue::setFilterBitmap},
958    {"setDither","(Z)V", (void*) PaintGlue::setDither},
959    {"native_getStyle","(J)I", (void*) PaintGlue::getStyle},
960    {"native_setStyle","(JI)V", (void*) PaintGlue::setStyle},
961    {"getColor","()I", (void*) PaintGlue::getColor},
962    {"setColor","(I)V", (void*) PaintGlue::setColor},
963    {"getAlpha","()I", (void*) PaintGlue::getAlpha},
964    {"setAlpha","(I)V", (void*) PaintGlue::setAlpha},
965    {"getStrokeWidth","()F", (void*) PaintGlue::getStrokeWidth},
966    {"setStrokeWidth","(F)V", (void*) PaintGlue::setStrokeWidth},
967    {"getStrokeMiter","()F", (void*) PaintGlue::getStrokeMiter},
968    {"setStrokeMiter","(F)V", (void*) PaintGlue::setStrokeMiter},
969    {"native_getStrokeCap","(J)I", (void*) PaintGlue::getStrokeCap},
970    {"native_setStrokeCap","(JI)V", (void*) PaintGlue::setStrokeCap},
971    {"native_getStrokeJoin","(J)I", (void*) PaintGlue::getStrokeJoin},
972    {"native_setStrokeJoin","(JI)V", (void*) PaintGlue::setStrokeJoin},
973    {"native_getFillPath","(JJJ)Z", (void*) PaintGlue::getFillPath},
974    {"native_setShader","(JJ)J", (void*) PaintGlue::setShader},
975    {"native_setColorFilter","(JJ)J", (void*) PaintGlue::setColorFilter},
976    {"native_setXfermode","(JJ)J", (void*) PaintGlue::setXfermode},
977    {"native_setPathEffect","(JJ)J", (void*) PaintGlue::setPathEffect},
978    {"native_setMaskFilter","(JJ)J", (void*) PaintGlue::setMaskFilter},
979    {"native_setTypeface","(JJ)J", (void*) PaintGlue::setTypeface},
980    {"native_setRasterizer","(JJ)J", (void*) PaintGlue::setRasterizer},
981    {"native_getTextAlign","(J)I", (void*) PaintGlue::getTextAlign},
982    {"native_setTextAlign","(JI)V", (void*) PaintGlue::setTextAlign},
983    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) PaintGlue::setTextLocale},
984    {"isElegantTextHeight","()Z", (void*) PaintGlue::isElegantTextHeight},
985    {"setElegantTextHeight","(Z)V", (void*) PaintGlue::setElegantTextHeight},
986    {"getTextSize","()F", (void*) PaintGlue::getTextSize},
987    {"setTextSize","(F)V", (void*) PaintGlue::setTextSize},
988    {"getTextScaleX","()F", (void*) PaintGlue::getTextScaleX},
989    {"setTextScaleX","(F)V", (void*) PaintGlue::setTextScaleX},
990    {"getTextSkewX","()F", (void*) PaintGlue::getTextSkewX},
991    {"setTextSkewX","(F)V", (void*) PaintGlue::setTextSkewX},
992    {"native_getLetterSpacing","(J)F", (void*) PaintGlue::getLetterSpacing},
993    {"native_setLetterSpacing","(JF)V", (void*) PaintGlue::setLetterSpacing},
994    {"ascent","()F", (void*) PaintGlue::ascent},
995    {"descent","()F", (void*) PaintGlue::descent},
996    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)PaintGlue::getFontMetrics},
997    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)PaintGlue::getFontMetricsInt},
998    {"native_measureText","([CIII)F", (void*) PaintGlue::measureText_CIII},
999    {"native_measureText","(Ljava/lang/String;I)F", (void*) PaintGlue::measureText_StringI},
1000    {"native_measureText","(Ljava/lang/String;III)F", (void*) PaintGlue::measureText_StringIII},
1001    {"native_breakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC},
1002    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS},
1003    {"native_getTextWidths","(JJ[CIII[F)I", (void*) PaintGlue::getTextWidths___CIII_F},
1004    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) PaintGlue::getTextWidths__StringIII_F},
1005    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1006        (void*) PaintGlue::getTextRunAdvances___CIIIIZ_FI},
1007    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1008        (void*) PaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1009
1010    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C},
1011    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1012        (void*) PaintGlue::getTextRunCursor__String},
1013    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C},
1014    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String},
1015    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1016                                        (void*) PaintGlue::getStringBounds },
1017    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1018                                    (void*) PaintGlue::getCharArrayBounds },
1019    {"native_setShadowLayer", "(JFFFI)V", (void*)PaintGlue::setShadowLayer},
1020    {"native_hasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer}
1021};
1022
1023static jfieldID req_fieldID(jfieldID id) {
1024    SkASSERT(id);
1025    return id;
1026}
1027
1028int register_android_graphics_Paint(JNIEnv* env) {
1029    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1030    SkASSERT(gFontMetrics_class);
1031    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1032
1033    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1034    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1035    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1036    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1037    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1038
1039    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1040    SkASSERT(gFontMetricsInt_class);
1041    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1042
1043    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1044    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1045    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1046    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1047    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1048
1049    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1050        sizeof(methods) / sizeof(methods[0]));
1051    return result;
1052}
1053
1054}
1055