Paint.cpp revision 805f6ebf17e2791624bb1a30834b4c1cc65583bf 
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
69class PaintGlue {
70public:
71    enum MoveOpt {
72        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
73    };
74
75    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
76        Paint* obj = reinterpret_cast<Paint*>(objHandle);
77        delete obj;
78    }
79
80    static jlong init(JNIEnv* env, jobject clazz) {
81        Paint* obj = new Paint();
82        defaultSettingsForAndroid(obj);
83        return reinterpret_cast<jlong>(obj);
84    }
85
86    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
87        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
88        Paint* obj = new Paint(*paint);
89        return reinterpret_cast<jlong>(obj);
90    }
91
92    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
93        Paint* obj = reinterpret_cast<Paint*>(objHandle);
94        obj->reset();
95        defaultSettingsForAndroid(obj);
96    }
97
98    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
99        Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle);
100        const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle);
101        *dst = *src;
102    }
103
104    // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
105    static const uint32_t sFilterBitmapFlag = 0x02;
106
107    static jint getFlags(JNIEnv* env, jobject paint) {
108        NPE_CHECK_RETURN_ZERO(env, paint);
109        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
110        uint32_t result = nativePaint->getFlags();
111        result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away.
112        if (nativePaint->getFilterLevel() != Paint::kNone_FilterLevel) {
113            result |= sFilterBitmapFlag;
114        }
115        return static_cast<jint>(result);
116    }
117
118    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
119        NPE_CHECK_RETURN_VOID(env, paint);
120        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
121        // Instead of modifying 0x02, change the filter level.
122        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
123                ? Paint::kLow_FilterLevel
124                : Paint::kNone_FilterLevel);
125        // Don't pass through filter flag, which is no longer stored in paint's flags.
126        flags &= ~sFilterBitmapFlag;
127        // Use the existing value for 0x02.
128        const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag;
129        flags |= existing0x02Flag;
130        nativePaint->setFlags(flags);
131    }
132
133    static jint getHinting(JNIEnv* env, jobject paint) {
134        NPE_CHECK_RETURN_ZERO(env, paint);
135        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
136                == Paint::kNo_Hinting ? 0 : 1;
137    }
138
139    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
140        NPE_CHECK_RETURN_VOID(env, paint);
141        GraphicsJNI::getNativePaint(env, paint)->setHinting(
142                mode == 0 ? Paint::kNo_Hinting : Paint::kNormal_Hinting);
143    }
144
145    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
146        NPE_CHECK_RETURN_VOID(env, paint);
147        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
148    }
149
150    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
151        NPE_CHECK_RETURN_VOID(env, paint);
152        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
153    }
154
155    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
156        NPE_CHECK_RETURN_VOID(env, paint);
157        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
158    }
159
160    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
161        NPE_CHECK_RETURN_VOID(env, paint);
162        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
163    }
164
165    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
166        NPE_CHECK_RETURN_VOID(env, paint);
167        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
168    }
169
170    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
171        NPE_CHECK_RETURN_VOID(env, paint);
172        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
173    }
174
175    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
176        NPE_CHECK_RETURN_VOID(env, paint);
177        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
178                filterBitmap ? Paint::kLow_FilterLevel : Paint::kNone_FilterLevel);
179    }
180
181    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
182        NPE_CHECK_RETURN_VOID(env, paint);
183        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
184    }
185
186    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
187        Paint* obj = reinterpret_cast<Paint*>(objHandle);
188        return static_cast<jint>(obj->getStyle());
189    }
190
191    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
192        Paint* obj = reinterpret_cast<Paint*>(objHandle);
193        Paint::Style style = static_cast<Paint::Style>(styleHandle);
194        obj->setStyle(style);
195    }
196
197    static jint getColor(JNIEnv* env, jobject paint) {
198        NPE_CHECK_RETURN_ZERO(env, paint);
199        int color;
200        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
201        return static_cast<jint>(color);
202    }
203
204    static jint getAlpha(JNIEnv* env, jobject paint) {
205        NPE_CHECK_RETURN_ZERO(env, paint);
206        int alpha;
207        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
208        return static_cast<jint>(alpha);
209    }
210
211    static void setColor(JNIEnv* env, jobject paint, jint color) {
212        NPE_CHECK_RETURN_VOID(env, paint);
213        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
214    }
215
216    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
217        NPE_CHECK_RETURN_VOID(env, paint);
218        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
219    }
220
221    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
222        NPE_CHECK_RETURN_ZERO(env, paint);
223        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
224    }
225
226    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
227        NPE_CHECK_RETURN_VOID(env, paint);
228        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
229    }
230
231    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
232        NPE_CHECK_RETURN_ZERO(env, paint);
233        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
234    }
235
236    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
237        NPE_CHECK_RETURN_VOID(env, paint);
238        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
239    }
240
241    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
242        Paint* obj = reinterpret_cast<Paint*>(objHandle);
243        return static_cast<jint>(obj->getStrokeCap());
244    }
245
246    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
247        Paint* obj = reinterpret_cast<Paint*>(objHandle);
248        Paint::Cap cap = static_cast<Paint::Cap>(capHandle);
249        obj->setStrokeCap(cap);
250    }
251
252    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
253        Paint* obj = reinterpret_cast<Paint*>(objHandle);
254        return static_cast<jint>(obj->getStrokeJoin());
255    }
256
257    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
258        Paint* obj = reinterpret_cast<Paint*>(objHandle);
259        Paint::Join join = (Paint::Join) joinHandle;
260        obj->setStrokeJoin(join);
261    }
262
263    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
264        Paint* obj = reinterpret_cast<Paint*>(objHandle);
265        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
266        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
267        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
268    }
269
270    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
271        Paint* obj = reinterpret_cast<Paint*>(objHandle);
272        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
273        return reinterpret_cast<jlong>(obj->setShader(shader));
274    }
275
276    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
277        Paint* obj = reinterpret_cast<Paint *>(objHandle);
278        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
279        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
280    }
281
282    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
283        Paint* obj = reinterpret_cast<Paint*>(objHandle);
284        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
285        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
286    }
287
288    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
289        Paint* obj = reinterpret_cast<Paint*>(objHandle);
290        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
291        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
292    }
293
294    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
295        Paint* obj = reinterpret_cast<Paint*>(objHandle);
296        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
297        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
298    }
299
300    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
301        // TODO: in Paint refactoring, set typeface on android Paint, not Paint
302        return NULL;
303    }
304
305    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
306        Paint* obj = reinterpret_cast<Paint*>(objHandle);
307        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
308        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
309    }
310
311    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
312        Paint* obj = reinterpret_cast<Paint*>(objHandle);
313        return static_cast<jint>(obj->getTextAlign());
314    }
315
316    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
317        Paint* obj = reinterpret_cast<Paint*>(objHandle);
318        Paint::Align align = static_cast<Paint::Align>(alignHandle);
319        obj->setTextAlign(align);
320    }
321
322    // generate bcp47 identifier for the supplied locale
323    static void toLanguageTag(char* output, size_t outSize,
324            const char* locale) {
325        if (output == NULL || outSize <= 0) {
326            return;
327        }
328        if (locale == NULL) {
329            output[0] = '\0';
330            return;
331        }
332        char canonicalChars[ULOC_FULLNAME_CAPACITY];
333        UErrorCode uErr = U_ZERO_ERROR;
334        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
335                &uErr);
336        if (U_SUCCESS(uErr)) {
337            char likelyChars[ULOC_FULLNAME_CAPACITY];
338            uErr = U_ZERO_ERROR;
339            uloc_addLikelySubtags(canonicalChars, likelyChars,
340                    ULOC_FULLNAME_CAPACITY, &uErr);
341            if (U_SUCCESS(uErr)) {
342                uErr = U_ZERO_ERROR;
343                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
344                if (U_SUCCESS(uErr)) {
345                    return;
346                } else {
347                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
348                            u_errorName(uErr));
349                }
350            } else {
351                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
352                        canonicalChars, u_errorName(uErr));
353            }
354        } else {
355            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
356                    u_errorName(uErr));
357        }
358        // unable to build a proper language identifier
359        output[0] = '\0';
360    }
361
362    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
363        Paint* obj = reinterpret_cast<Paint*>(objHandle);
364        ScopedUtfChars localeChars(env, locale);
365        char langTag[ULOC_FULLNAME_CAPACITY];
366        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
367
368        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
369        paintOpts.setLanguage(langTag);
370        obj->setPaintOptionsAndroid(paintOpts);
371    }
372
373    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
374        NPE_CHECK_RETURN_ZERO(env, paint);
375        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
376        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
377        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
378    }
379
380    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
381        NPE_CHECK_RETURN_VOID(env, paint);
382        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
383        SkPaintOptionsAndroid::FontVariant variant =
384            aa ? SkPaintOptionsAndroid::kElegant_Variant :
385            SkPaintOptionsAndroid::kDefault_Variant;
386        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
387        paintOpts.setFontVariant(variant);
388        obj->setPaintOptionsAndroid(paintOpts);
389    }
390
391    static jfloat getTextSize(JNIEnv* env, jobject paint) {
392        NPE_CHECK_RETURN_ZERO(env, paint);
393        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
394    }
395
396    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
397        NPE_CHECK_RETURN_VOID(env, paint);
398        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
399    }
400
401    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
402        NPE_CHECK_RETURN_ZERO(env, paint);
403        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
404    }
405
406    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
407        NPE_CHECK_RETURN_VOID(env, paint);
408        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
409    }
410
411    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
412        NPE_CHECK_RETURN_ZERO(env, paint);
413        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
414    }
415
416    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
417        NPE_CHECK_RETURN_VOID(env, paint);
418        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
419    }
420
421    static jfloat getLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle) {
422        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
423        return paint->getLetterSpacing();
424    }
425
426    static void setLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat letterSpacing) {
427        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
428        paint->setLetterSpacing(letterSpacing);
429    }
430
431    static void setFontFeatureSettings(JNIEnv* env, jobject clazz, jlong paintHandle, jstring settings) {
432        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
433        if (!settings)
434            paint->setFontFeatureSettings(std::string());
435        else {
436            ScopedUtfChars settingsChars(env, settings);
437            paint->setFontFeatureSettings(std::string(settingsChars.c_str(), settingsChars.size()));
438        }
439    }
440
441    static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, Paint::FontMetrics *metrics) {
442        const int kElegantTop = 2500;
443        const int kElegantBottom = -1000;
444        const int kElegantAscent = 1900;
445        const int kElegantDescent = -500;
446        const int kElegantLeading = 0;
447        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
448        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
449        typeface = TypefaceImpl_resolveDefault(typeface);
450        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
451        float saveSkewX = paint->getTextSkewX();
452        bool savefakeBold = paint->isFakeBoldText();
453        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
454        SkScalar spacing = paint->getFontMetrics(metrics);
455        // The populateSkPaint call may have changed fake bold / text skew
456        // because we want to measure with those effects applied, so now
457        // restore the original settings.
458        paint->setTextSkewX(saveSkewX);
459        paint->setFakeBoldText(savefakeBold);
460        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
461        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
462            SkScalar size = paint->getTextSize();
463            metrics->fTop = -size * kElegantTop / 2048;
464            metrics->fBottom = -size * kElegantBottom / 2048;
465            metrics->fAscent = -size * kElegantAscent / 2048;
466            metrics->fDescent = -size * kElegantDescent / 2048;
467            metrics->fLeading = size * kElegantLeading / 2048;
468            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
469        }
470        return spacing;
471    }
472
473    static jfloat ascent(JNIEnv* env, jobject paint) {
474        NPE_CHECK_RETURN_ZERO(env, paint);
475        Paint::FontMetrics metrics;
476        getMetricsInternal(env, paint, &metrics);
477        return SkScalarToFloat(metrics.fAscent);
478    }
479
480    static jfloat descent(JNIEnv* env, jobject paint) {
481        NPE_CHECK_RETURN_ZERO(env, paint);
482        Paint::FontMetrics metrics;
483        getMetricsInternal(env, paint, &metrics);
484        return SkScalarToFloat(metrics.fDescent);
485    }
486
487    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
488        NPE_CHECK_RETURN_ZERO(env, paint);
489        Paint::FontMetrics metrics;
490        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
491
492        if (metricsObj) {
493            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
494            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
495            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
496            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
497            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
498            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
499        }
500        return SkScalarToFloat(spacing);
501    }
502
503    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
504        NPE_CHECK_RETURN_ZERO(env, paint);
505        Paint::FontMetrics metrics;
506
507        getMetricsInternal(env, paint, &metrics);
508        int ascent = SkScalarRoundToInt(metrics.fAscent);
509        int descent = SkScalarRoundToInt(metrics.fDescent);
510        int leading = SkScalarRoundToInt(metrics.fLeading);
511
512        if (metricsObj) {
513            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
514            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
515            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
516            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
517            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
518            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
519        }
520        return descent - ascent + leading;
521    }
522
523    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
524            jint bidiFlags) {
525        NPE_CHECK_RETURN_ZERO(env, jpaint);
526        NPE_CHECK_RETURN_ZERO(env, text);
527
528        size_t textLength = env->GetArrayLength(text);
529        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
530            doThrowAIOOBE(env);
531            return 0;
532        }
533        if (count == 0) {
534            return 0;
535        }
536
537        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
538        const jchar* textArray = env->GetCharArrayElements(text, NULL);
539        jfloat result = 0;
540
541        Layout layout;
542        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
543        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, index, count, textLength);
544        result = layout.getAdvance();
545        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
546        return result;
547    }
548
549    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
550            jint bidiFlags) {
551        NPE_CHECK_RETURN_ZERO(env, jpaint);
552        NPE_CHECK_RETURN_ZERO(env, text);
553
554        size_t textLength = env->GetStringLength(text);
555        int count = end - start;
556        if ((start | count) < 0 || (size_t)end > textLength) {
557            doThrowAIOOBE(env);
558            return 0;
559        }
560        if (count == 0) {
561            return 0;
562        }
563
564        const jchar* textArray = env->GetStringChars(text, NULL);
565        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
566        jfloat width = 0;
567
568        Layout layout;
569        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
570        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, start, count, textLength);
571        width = layout.getAdvance();
572
573        env->ReleaseStringChars(text, textArray);
574        return width;
575    }
576
577    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
578        NPE_CHECK_RETURN_ZERO(env, jpaint);
579        NPE_CHECK_RETURN_ZERO(env, text);
580
581        size_t textLength = env->GetStringLength(text);
582        if (textLength == 0) {
583            return 0;
584        }
585
586        const jchar* textArray = env->GetStringChars(text, NULL);
587        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
588        jfloat width = 0;
589
590        Layout layout;
591        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
592        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, 0, textLength, textLength);
593        width = layout.getAdvance();
594
595        env->ReleaseStringChars(text, textArray);
596        return width;
597    }
598
599    static int dotextwidths(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar text[], int count,
600            jfloatArray widths, jint bidiFlags) {
601        NPE_CHECK_RETURN_ZERO(env, paint);
602        NPE_CHECK_RETURN_ZERO(env, text);
603
604        if (count < 0 || !widths) {
605            doThrowAIOOBE(env);
606            return 0;
607        }
608        if (count == 0) {
609            return 0;
610        }
611        size_t widthsLength = env->GetArrayLength(widths);
612        if ((size_t)count > widthsLength) {
613            doThrowAIOOBE(env);
614            return 0;
615        }
616
617        AutoJavaFloatArray autoWidths(env, widths, count);
618        jfloat* widthsArray = autoWidths.ptr();
619
620        Layout layout;
621        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
622        layout.getAdvances(widthsArray);
623
624        return count;
625    }
626
627    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
628            jint index, jint count, jint bidiFlags, jfloatArray widths) {
629        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
630        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
631        const jchar* textArray = env->GetCharArrayElements(text, NULL);
632        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
633        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
634                                      JNI_ABORT);
635        return count;
636    }
637
638    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
639            jint start, jint end, jint bidiFlags, jfloatArray widths) {
640        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
641        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
642        const jchar* textArray = env->GetStringChars(text, NULL);
643        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
644        env->ReleaseStringChars(text, textArray);
645        return count;
646    }
647
648    static jfloat doTextRunAdvances(JNIEnv *env, Paint *paint, TypefaceImpl* typeface, const jchar *text,
649                                    jint start, jint count, jint contextCount, jboolean isRtl,
650                                    jfloatArray advances, jint advancesIndex) {
651        NPE_CHECK_RETURN_ZERO(env, paint);
652        NPE_CHECK_RETURN_ZERO(env, text);
653
654        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
655            doThrowAIOOBE(env);
656            return 0;
657        }
658        if (count == 0) {
659            return 0;
660        }
661        if (advances) {
662            size_t advancesLength = env->GetArrayLength(advances);
663            if ((size_t)count > advancesLength) {
664                doThrowAIOOBE(env);
665                return 0;
666            }
667        }
668        jfloat* advancesArray = new jfloat[count];
669        jfloat totalAdvance = 0;
670
671        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
672
673        Layout layout;
674        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, start, count, contextCount);
675        layout.getAdvances(advancesArray);
676        totalAdvance = layout.getAdvance();
677
678        if (advances != NULL) {
679            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
680        }
681        delete [] advancesArray;
682        return totalAdvance;
683    }
684
685    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
686            jlong typefaceHandle,
687            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
688            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
689        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
690        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
691        jchar* textArray = env->GetCharArrayElements(text, NULL);
692        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
693                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
694        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
695        return result;
696    }
697
698    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
699            jlong typefaceHandle,
700            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
701            jfloatArray advances, jint advancesIndex) {
702        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
703        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
704        const jchar* textArray = env->GetStringChars(text, NULL);
705        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
706                start - contextStart, end - start, contextEnd - contextStart, isRtl,
707                advances, advancesIndex);
708        env->ReleaseStringChars(text, textArray);
709        return result;
710    }
711
712    static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start,
713            jint count, jint flags, jint offset, jint opt) {
714        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
715        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
716        return static_cast<jint>(result);
717    }
718
719    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
720            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
721        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
722        jchar* textArray = env->GetCharArrayElements(text, NULL);
723        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
724                offset, cursorOpt);
725        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
726        return result;
727    }
728
729    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
730            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
731        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
732        const jchar* textArray = env->GetStringChars(text, NULL);
733        jint result = doTextRunCursor(env, paint, textArray, contextStart,
734                contextEnd - contextStart, dir, offset, cursorOpt);
735        env->ReleaseStringChars(text, textArray);
736        return result;
737    }
738
739    class GetTextFunctor {
740    public:
741        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint,
742                    uint16_t* glyphs, SkPoint* pos)
743                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
744        }
745
746        void operator()(size_t start, size_t end) {
747            for (size_t i = start; i < end; i++) {
748                glyphs[i] = layout.getGlyphId(i);
749                pos[i].fX = x + layout.getX(i);
750                pos[i].fY = y + layout.getY(i);
751            }
752            if (start == 0) {
753                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
754            } else {
755                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
756                path->addPath(tmpPath);
757            }
758        }
759    private:
760        const Layout& layout;
761        SkPath* path;
762        jfloat x;
763        jfloat y;
764        Paint* paint;
765        uint16_t* glyphs;
766        SkPoint* pos;
767        SkPath tmpPath;
768    };
769
770    static void getTextPath(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar* text,
771            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
772        Layout layout;
773        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
774        size_t nGlyphs = layout.nGlyphs();
775        uint16_t* glyphs = new uint16_t[nGlyphs];
776        SkPoint* pos = new SkPoint[nGlyphs];
777
778        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
779        Paint::Align align = paint->getTextAlign();
780        paint->setTextAlign(Paint::kLeft_Align);
781        paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
782        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
783        MinikinUtils::forFontRun(layout, paint, f);
784        paint->setTextAlign(align);
785        delete[] glyphs;
786        delete[] pos;
787    }
788
789    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
790            jlong typefaceHandle, jint bidiFlags,
791            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
792        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
793        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
794        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
795        const jchar* textArray = env->GetCharArrayElements(text, NULL);
796        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
797        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
798    }
799
800    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
801            jlong typefaceHandle, jint bidiFlags,
802            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
803        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
804        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
805        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
806        const jchar* textArray = env->GetStringChars(text, NULL);
807        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
808        env->ReleaseStringChars(text, textArray);
809    }
810
811    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
812                               jfloat dx, jfloat dy, jint color) {
813        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
814        if (radius <= 0) {
815            paint->setLooper(NULL);
816        }
817        else {
818            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
819            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
820        }
821    }
822
823    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
824        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
825        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
826    }
827
828    static int breakText(JNIEnv* env, const Paint& paint, TypefaceImpl* typeface, const jchar text[],
829                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
830                         Paint::TextBufferDirection textBufferDirection) {
831        size_t measuredCount = 0;
832        float measured = 0;
833
834        Layout layout;
835        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
836        float* advances = new float[count];
837        layout.getAdvances(advances);
838        const bool forwardScan = (textBufferDirection == Paint::kForward_TextBufferDirection);
839        for (int i = 0; i < count; i++) {
840            // traverse in the given direction
841            int index = forwardScan ? i : (count - i - 1);
842            float width = advances[index];
843            if (measured + width > maxWidth) {
844                break;
845            }
846            // properly handle clusters when scanning backwards
847            if (forwardScan || width != 0.0f) {
848                measuredCount = i + 1;
849            }
850            measured += width;
851        }
852        delete[] advances;
853
854        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
855            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
856            jfloat* array = autoMeasured.ptr();
857            array[0] = measured;
858        }
859        return measuredCount;
860    }
861
862    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
863            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
864        NPE_CHECK_RETURN_ZERO(env, jtext);
865
866        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
867        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
868
869        Paint::TextBufferDirection tbd;
870        if (count < 0) {
871            tbd = Paint::kBackward_TextBufferDirection;
872            count = -count;
873        }
874        else {
875            tbd = Paint::kForward_TextBufferDirection;
876        }
877
878        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
879            doThrowAIOOBE(env);
880            return 0;
881        }
882
883        const jchar* text = env->GetCharArrayElements(jtext, NULL);
884        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
885                          bidiFlags, jmeasuredWidth, tbd);
886        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
887                                      JNI_ABORT);
888        return count;
889    }
890
891    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
892                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
893        NPE_CHECK_RETURN_ZERO(env, jtext);
894
895        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
896        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
897
898        Paint::TextBufferDirection tbd = forwards ?
899                                        Paint::kForward_TextBufferDirection :
900                                        Paint::kBackward_TextBufferDirection;
901
902        int count = env->GetStringLength(jtext);
903        const jchar* text = env->GetStringChars(jtext, NULL);
904        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
905        env->ReleaseStringChars(jtext, text);
906        return count;
907    }
908
909    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
910            const Paint& paint, TypefaceImpl* typeface, jint bidiFlags) {
911        SkRect  r;
912        SkIRect ir;
913
914        Layout layout;
915        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
916        MinikinRect rect;
917        layout.getBounds(&rect);
918        r.fLeft = rect.mLeft;
919        r.fTop = rect.mTop;
920        r.fRight = rect.mRight;
921        r.fBottom = rect.mBottom;
922        r.roundOut(&ir);
923        GraphicsJNI::irect_to_jrect(ir, env, bounds);
924    }
925
926    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
927                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
928        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);;
929        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
930        const jchar* textArray = env->GetStringChars(text, NULL);
931        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
932        env->ReleaseStringChars(text, textArray);
933    }
934
935    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
936                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
937        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
938        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
939        const jchar* textArray = env->GetCharArrayElements(text, NULL);
940        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
941        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
942                                      JNI_ABORT);
943    }
944
945};
946
947static JNINativeMethod methods[] = {
948    {"finalizer", "(J)V", (void*) PaintGlue::finalizer},
949    {"native_init","()J", (void*) PaintGlue::init},
950    {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint},
951    {"native_reset","(J)V", (void*) PaintGlue::reset},
952    {"native_set","(JJ)V", (void*) PaintGlue::assign},
953    {"getFlags","()I", (void*) PaintGlue::getFlags},
954    {"setFlags","(I)V", (void*) PaintGlue::setFlags},
955    {"getHinting","()I", (void*) PaintGlue::getHinting},
956    {"setHinting","(I)V", (void*) PaintGlue::setHinting},
957    {"setAntiAlias","(Z)V", (void*) PaintGlue::setAntiAlias},
958    {"setSubpixelText","(Z)V", (void*) PaintGlue::setSubpixelText},
959    {"setLinearText","(Z)V", (void*) PaintGlue::setLinearText},
960    {"setUnderlineText","(Z)V", (void*) PaintGlue::setUnderlineText},
961    {"setStrikeThruText","(Z)V", (void*) PaintGlue::setStrikeThruText},
962    {"setFakeBoldText","(Z)V", (void*) PaintGlue::setFakeBoldText},
963    {"setFilterBitmap","(Z)V", (void*) PaintGlue::setFilterBitmap},
964    {"setDither","(Z)V", (void*) PaintGlue::setDither},
965    {"native_getStyle","(J)I", (void*) PaintGlue::getStyle},
966    {"native_setStyle","(JI)V", (void*) PaintGlue::setStyle},
967    {"getColor","()I", (void*) PaintGlue::getColor},
968    {"setColor","(I)V", (void*) PaintGlue::setColor},
969    {"getAlpha","()I", (void*) PaintGlue::getAlpha},
970    {"setAlpha","(I)V", (void*) PaintGlue::setAlpha},
971    {"getStrokeWidth","()F", (void*) PaintGlue::getStrokeWidth},
972    {"setStrokeWidth","(F)V", (void*) PaintGlue::setStrokeWidth},
973    {"getStrokeMiter","()F", (void*) PaintGlue::getStrokeMiter},
974    {"setStrokeMiter","(F)V", (void*) PaintGlue::setStrokeMiter},
975    {"native_getStrokeCap","(J)I", (void*) PaintGlue::getStrokeCap},
976    {"native_setStrokeCap","(JI)V", (void*) PaintGlue::setStrokeCap},
977    {"native_getStrokeJoin","(J)I", (void*) PaintGlue::getStrokeJoin},
978    {"native_setStrokeJoin","(JI)V", (void*) PaintGlue::setStrokeJoin},
979    {"native_getFillPath","(JJJ)Z", (void*) PaintGlue::getFillPath},
980    {"native_setShader","(JJ)J", (void*) PaintGlue::setShader},
981    {"native_setColorFilter","(JJ)J", (void*) PaintGlue::setColorFilter},
982    {"native_setXfermode","(JJ)J", (void*) PaintGlue::setXfermode},
983    {"native_setPathEffect","(JJ)J", (void*) PaintGlue::setPathEffect},
984    {"native_setMaskFilter","(JJ)J", (void*) PaintGlue::setMaskFilter},
985    {"native_setTypeface","(JJ)J", (void*) PaintGlue::setTypeface},
986    {"native_setRasterizer","(JJ)J", (void*) PaintGlue::setRasterizer},
987    {"native_getTextAlign","(J)I", (void*) PaintGlue::getTextAlign},
988    {"native_setTextAlign","(JI)V", (void*) PaintGlue::setTextAlign},
989    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) PaintGlue::setTextLocale},
990    {"isElegantTextHeight","()Z", (void*) PaintGlue::isElegantTextHeight},
991    {"setElegantTextHeight","(Z)V", (void*) PaintGlue::setElegantTextHeight},
992    {"getTextSize","()F", (void*) PaintGlue::getTextSize},
993    {"setTextSize","(F)V", (void*) PaintGlue::setTextSize},
994    {"getTextScaleX","()F", (void*) PaintGlue::getTextScaleX},
995    {"setTextScaleX","(F)V", (void*) PaintGlue::setTextScaleX},
996    {"getTextSkewX","()F", (void*) PaintGlue::getTextSkewX},
997    {"setTextSkewX","(F)V", (void*) PaintGlue::setTextSkewX},
998    {"native_getLetterSpacing","(J)F", (void*) PaintGlue::getLetterSpacing},
999    {"native_setLetterSpacing","(JF)V", (void*) PaintGlue::setLetterSpacing},
1000    {"native_setFontFeatureSettings","(JLjava/lang/String;)V", (void*) PaintGlue::setFontFeatureSettings},
1001    {"ascent","()F", (void*) PaintGlue::ascent},
1002    {"descent","()F", (void*) PaintGlue::descent},
1003    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)PaintGlue::getFontMetrics},
1004    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)PaintGlue::getFontMetricsInt},
1005    {"native_measureText","([CIII)F", (void*) PaintGlue::measureText_CIII},
1006    {"native_measureText","(Ljava/lang/String;I)F", (void*) PaintGlue::measureText_StringI},
1007    {"native_measureText","(Ljava/lang/String;III)F", (void*) PaintGlue::measureText_StringIII},
1008    {"native_breakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC},
1009    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS},
1010    {"native_getTextWidths","(JJ[CIII[F)I", (void*) PaintGlue::getTextWidths___CIII_F},
1011    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) PaintGlue::getTextWidths__StringIII_F},
1012    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1013        (void*) PaintGlue::getTextRunAdvances___CIIIIZ_FI},
1014    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1015        (void*) PaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1016
1017    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C},
1018    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1019        (void*) PaintGlue::getTextRunCursor__String},
1020    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C},
1021    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String},
1022    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1023                                        (void*) PaintGlue::getStringBounds },
1024    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1025                                    (void*) PaintGlue::getCharArrayBounds },
1026    {"native_setShadowLayer", "(JFFFI)V", (void*)PaintGlue::setShadowLayer},
1027    {"native_hasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer}
1028};
1029
1030static jfieldID req_fieldID(jfieldID id) {
1031    SkASSERT(id);
1032    return id;
1033}
1034
1035int register_android_graphics_Paint(JNIEnv* env) {
1036    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1037    SkASSERT(gFontMetrics_class);
1038    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1039
1040    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1041    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1042    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1043    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1044    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1045
1046    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1047    SkASSERT(gFontMetricsInt_class);
1048    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1049
1050    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1051    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1052    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1053    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1054    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1055
1056    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1057        sizeof(methods) / sizeof(methods[0]));
1058    return result;
1059}
1060
1061}
1062