Paint.cpp revision 3d528c403c8945cc326bb656ff0c2e11373401da 
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 <minikin/Layout.h>
40#include "MinikinSkia.h"
41#include "MinikinUtils.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(SkPaint* paint) {
65    // GlyphID encoding is required because we are using Harfbuzz shaping
66    paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
67
68    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
69    paintOpts.setUseFontFallbacks(true);
70    paint->setPaintOptionsAndroid(paintOpts);
71}
72
73class SkPaintGlue {
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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
81        delete obj;
82    }
83
84    static jlong init(JNIEnv* env, jobject clazz) {
85        SkPaint* obj = new SkPaint();
86        defaultSettingsForAndroid(obj);
87        return reinterpret_cast<jlong>(obj);
88    }
89
90    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
91        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
92        SkPaint* obj = new SkPaint(*paint);
93        return reinterpret_cast<jlong>(obj);
94    }
95
96    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
97        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
98        obj->reset();
99        defaultSettingsForAndroid(obj);
100    }
101
102    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
103        SkPaint* dst = reinterpret_cast<SkPaint*>(dstPaintHandle);
104        const SkPaint* src = reinterpret_cast<SkPaint*>(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        SkPaint* 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() != SkPaint::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        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
125        // Instead of modifying 0x02, change the filter level.
126        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
127                ? SkPaint::kLow_FilterLevel
128                : SkPaint::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                == SkPaint::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 ? SkPaint::kNo_Hinting : SkPaint::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 ? SkPaint::kLow_FilterLevel : SkPaint::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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
192        return static_cast<jint>(obj->getStyle());
193    }
194
195    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
196        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
197        SkPaint::Style style = static_cast<SkPaint::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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
247        return static_cast<jint>(obj->getStrokeCap());
248    }
249
250    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
251        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
252        SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle);
253        obj->setStrokeCap(cap);
254    }
255
256    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
257        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
258        return static_cast<jint>(obj->getStrokeJoin());
259    }
260
261    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
262        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
263        SkPaint::Join join = (SkPaint::Join) joinHandle;
264        obj->setStrokeJoin(join);
265    }
266
267    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
268        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint *>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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 SkPaint
306        return NULL;
307    }
308
309    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
310        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
317        return static_cast<jint>(obj->getTextAlign());
318    }
319
320    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
321        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
322        SkPaint::Align align = static_cast<SkPaint::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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* 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        SkPaint* 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 SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, SkPaint::FontMetrics *metrics) {
426        const int kElegantTop = 2500;
427        const int kElegantBottom = -1000;
428        const int kElegantAscent = 1900;
429        const int kElegantDescent = -500;
430        const int kElegantLeading = 0;
431        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
432        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
433        typeface = TypefaceImpl_resolveDefault(typeface);
434        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
435        float saveSkewX = paint->getTextSkewX();
436        bool savefakeBold = paint->isFakeBoldText();
437        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
438        SkScalar spacing = paint->getFontMetrics(metrics);
439        // The populateSkPaint call may have changed fake bold / text skew
440        // because we want to measure with those effects applied, so now
441        // restore the original settings.
442        paint->setTextSkewX(saveSkewX);
443        paint->setFakeBoldText(savefakeBold);
444        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
445        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
446            SkScalar size = paint->getTextSize();
447            metrics->fTop = -size * kElegantTop / 2048;
448            metrics->fBottom = -size * kElegantBottom / 2048;
449            metrics->fAscent = -size * kElegantAscent / 2048;
450            metrics->fDescent = -size * kElegantDescent / 2048;
451            metrics->fLeading = size * kElegantLeading / 2048;
452            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
453        }
454        return spacing;
455    }
456
457    static jfloat ascent(JNIEnv* env, jobject paint) {
458        NPE_CHECK_RETURN_ZERO(env, paint);
459        SkPaint::FontMetrics metrics;
460        getMetricsInternal(env, paint, &metrics);
461        return SkScalarToFloat(metrics.fAscent);
462    }
463
464    static jfloat descent(JNIEnv* env, jobject paint) {
465        NPE_CHECK_RETURN_ZERO(env, paint);
466        SkPaint::FontMetrics metrics;
467        getMetricsInternal(env, paint, &metrics);
468        return SkScalarToFloat(metrics.fDescent);
469    }
470
471    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
472        NPE_CHECK_RETURN_ZERO(env, paint);
473        SkPaint::FontMetrics metrics;
474        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
475
476        if (metricsObj) {
477            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
478            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
479            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
480            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
481            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
482            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
483        }
484        return SkScalarToFloat(spacing);
485    }
486
487    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
488        NPE_CHECK_RETURN_ZERO(env, paint);
489        SkPaint::FontMetrics metrics;
490
491        getMetricsInternal(env, paint, &metrics);
492        int ascent = SkScalarRoundToInt(metrics.fAscent);
493        int descent = SkScalarRoundToInt(metrics.fDescent);
494        int leading = SkScalarRoundToInt(metrics.fLeading);
495
496        if (metricsObj) {
497            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
498            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
499            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
500            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
501            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
502            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
503        }
504        return descent - ascent + leading;
505    }
506
507    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
508            jint bidiFlags) {
509        NPE_CHECK_RETURN_ZERO(env, jpaint);
510        NPE_CHECK_RETURN_ZERO(env, text);
511
512        size_t textLength = env->GetArrayLength(text);
513        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
514            doThrowAIOOBE(env);
515            return 0;
516        }
517        if (count == 0) {
518            return 0;
519        }
520
521        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
522        const jchar* textArray = env->GetCharArrayElements(text, NULL);
523        jfloat result = 0;
524
525        Layout layout;
526        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
527        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
528        layout.doLayout(textArray, index, count, textLength, css);
529        result = layout.getAdvance();
530        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
531        return result;
532    }
533
534    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
535            jint bidiFlags) {
536        NPE_CHECK_RETURN_ZERO(env, jpaint);
537        NPE_CHECK_RETURN_ZERO(env, text);
538
539        size_t textLength = env->GetStringLength(text);
540        int count = end - start;
541        if ((start | count) < 0 || (size_t)end > textLength) {
542            doThrowAIOOBE(env);
543            return 0;
544        }
545        if (count == 0) {
546            return 0;
547        }
548
549        const jchar* textArray = env->GetStringChars(text, NULL);
550        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
551        jfloat width = 0;
552
553        Layout layout;
554        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
555        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
556        layout.doLayout(textArray, start, count, textLength, css);
557        width = layout.getAdvance();
558
559        env->ReleaseStringChars(text, textArray);
560        return width;
561    }
562
563    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
564        NPE_CHECK_RETURN_ZERO(env, jpaint);
565        NPE_CHECK_RETURN_ZERO(env, text);
566
567        size_t textLength = env->GetStringLength(text);
568        if (textLength == 0) {
569            return 0;
570        }
571
572        const jchar* textArray = env->GetStringChars(text, NULL);
573        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
574        jfloat width = 0;
575
576        Layout layout;
577        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
578        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
579        layout.doLayout(textArray, 0, textLength, textLength, css);
580        width = layout.getAdvance();
581
582        env->ReleaseStringChars(text, textArray);
583        return width;
584    }
585
586    static int dotextwidths(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar text[], int count,
587            jfloatArray widths, jint bidiFlags) {
588        NPE_CHECK_RETURN_ZERO(env, paint);
589        NPE_CHECK_RETURN_ZERO(env, text);
590
591        if (count < 0 || !widths) {
592            doThrowAIOOBE(env);
593            return 0;
594        }
595        if (count == 0) {
596            return 0;
597        }
598        size_t widthsLength = env->GetArrayLength(widths);
599        if ((size_t)count > widthsLength) {
600            doThrowAIOOBE(env);
601            return 0;
602        }
603
604        AutoJavaFloatArray autoWidths(env, widths, count);
605        jfloat* widthsArray = autoWidths.ptr();
606
607        Layout layout;
608        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
609        layout.doLayout(text, 0, count, count, css);
610        layout.getAdvances(widthsArray);
611
612        return count;
613    }
614
615    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
616            jint index, jint count, jint bidiFlags, jfloatArray widths) {
617        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
618        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
619        const jchar* textArray = env->GetCharArrayElements(text, NULL);
620        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
621        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
622                                      JNI_ABORT);
623        return count;
624    }
625
626    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
627            jint start, jint end, jint bidiFlags, jfloatArray widths) {
628        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
629        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
630        const jchar* textArray = env->GetStringChars(text, NULL);
631        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
632        env->ReleaseStringChars(text, textArray);
633        return count;
634    }
635
636    static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, TypefaceImpl* typeface, const jchar *text,
637                                    jint start, jint count, jint contextCount, jboolean isRtl,
638                                    jfloatArray advances, jint advancesIndex) {
639        NPE_CHECK_RETURN_ZERO(env, paint);
640        NPE_CHECK_RETURN_ZERO(env, text);
641
642        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
643            doThrowAIOOBE(env);
644            return 0;
645        }
646        if (count == 0) {
647            return 0;
648        }
649        if (advances) {
650            size_t advancesLength = env->GetArrayLength(advances);
651            if ((size_t)count > advancesLength) {
652                doThrowAIOOBE(env);
653                return 0;
654            }
655        }
656        jfloat* advancesArray = new jfloat[count];
657        jfloat totalAdvance = 0;
658
659        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
660
661        Layout layout;
662        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
663        layout.doLayout(text, start, count, contextCount, css);
664        layout.getAdvances(advancesArray);
665        totalAdvance = layout.getAdvance();
666
667        if (advances != NULL) {
668            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
669        }
670        delete [] advancesArray;
671        return totalAdvance;
672    }
673
674    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
675            jlong typefaceHandle,
676            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
677            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
678        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
679        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
680        jchar* textArray = env->GetCharArrayElements(text, NULL);
681        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
682                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
683        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
684        return result;
685    }
686
687    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
688            jlong typefaceHandle,
689            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
690            jfloatArray advances, jint advancesIndex) {
691        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
692        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
693        const jchar* textArray = env->GetStringChars(text, NULL);
694        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
695                start - contextStart, end - start, contextEnd - contextStart, isRtl,
696                advances, advancesIndex);
697        env->ReleaseStringChars(text, textArray);
698        return result;
699    }
700
701    static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start,
702            jint count, jint flags, jint offset, jint opt) {
703        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
704        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
705        return static_cast<jint>(result);
706    }
707
708    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
709            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
710        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
711        jchar* textArray = env->GetCharArrayElements(text, NULL);
712        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
713                offset, cursorOpt);
714        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
715        return result;
716    }
717
718    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
719            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
720        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
721        const jchar* textArray = env->GetStringChars(text, NULL);
722        jint result = doTextRunCursor(env, paint, textArray, contextStart,
723                contextEnd - contextStart, dir, offset, cursorOpt);
724        env->ReleaseStringChars(text, textArray);
725        return result;
726    }
727
728    class GetTextFunctor {
729    public:
730        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, SkPaint* paint,
731                    uint16_t* glyphs, SkPoint* pos)
732                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
733        }
734
735        void operator()(size_t start, size_t end) {
736            for (size_t i = start; i < end; i++) {
737                glyphs[i] = layout.getGlyphId(i);
738                pos[i].fX = x + layout.getX(i);
739                pos[i].fY = y + layout.getY(i);
740            }
741            if (start == 0) {
742                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
743            } else {
744                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
745                path->addPath(tmpPath);
746            }
747        }
748    private:
749        const Layout& layout;
750        SkPath* path;
751        jfloat x;
752        jfloat y;
753        SkPaint* paint;
754        uint16_t* glyphs;
755        SkPoint* pos;
756        SkPath tmpPath;
757    };
758
759    static void getTextPath(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar* text,
760            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
761        Layout layout;
762        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
763        layout.doLayout(text, 0, count, count, css);
764        size_t nGlyphs = layout.nGlyphs();
765        uint16_t* glyphs = new uint16_t[nGlyphs];
766        SkPoint* pos = new SkPoint[nGlyphs];
767
768        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
769        SkPaint::Align align = paint->getTextAlign();
770        paint->setTextAlign(SkPaint::kLeft_Align);
771        paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
772        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
773        MinikinUtils::forFontRun(layout, paint, f);
774        paint->setTextAlign(align);
775        delete[] glyphs;
776        delete[] pos;
777    }
778
779    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
780            jlong typefaceHandle, jint bidiFlags,
781            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
782        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
783        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
784        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
785        const jchar* textArray = env->GetCharArrayElements(text, NULL);
786        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
787        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
788    }
789
790    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
791            jlong typefaceHandle, jint bidiFlags,
792            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
793        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
794        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
795        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
796        const jchar* textArray = env->GetStringChars(text, NULL);
797        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
798        env->ReleaseStringChars(text, textArray);
799    }
800
801    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
802                               jfloat dx, jfloat dy, jint color) {
803        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
804        if (radius <= 0) {
805            paint->setLooper(NULL);
806        }
807        else {
808            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
809            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
810        }
811    }
812
813    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
814        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
815        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
816    }
817
818    static int breakText(JNIEnv* env, const SkPaint& paint, TypefaceImpl* typeface, const jchar text[],
819                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
820                         SkPaint::TextBufferDirection textBufferDirection) {
821        size_t measuredCount = 0;
822        float measured = 0;
823
824        Layout layout;
825        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
826        layout.doLayout(text, 0, count, count, css);
827        float* advances = new float[count];
828        layout.getAdvances(advances);
829        const bool forwardScan = (textBufferDirection == SkPaint::kForward_TextBufferDirection);
830        for (int i = 0; i < count; i++) {
831            // traverse in the given direction
832            int index = forwardScan ? i : (count - i - 1);
833            float width = advances[index];
834            if (measured + width > maxWidth) {
835                break;
836            }
837            // properly handle clusters when scanning backwards
838            if (forwardScan || width != 0.0f) {
839                measuredCount = i + 1;
840            }
841            measured += width;
842        }
843        delete[] advances;
844
845        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
846            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
847            jfloat* array = autoMeasured.ptr();
848            array[0] = measured;
849        }
850        return measuredCount;
851    }
852
853    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
854            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
855        NPE_CHECK_RETURN_ZERO(env, jtext);
856
857        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
858        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
859
860        SkPaint::TextBufferDirection tbd;
861        if (count < 0) {
862            tbd = SkPaint::kBackward_TextBufferDirection;
863            count = -count;
864        }
865        else {
866            tbd = SkPaint::kForward_TextBufferDirection;
867        }
868
869        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
870            doThrowAIOOBE(env);
871            return 0;
872        }
873
874        const jchar* text = env->GetCharArrayElements(jtext, NULL);
875        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
876                          bidiFlags, jmeasuredWidth, tbd);
877        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
878                                      JNI_ABORT);
879        return count;
880    }
881
882    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
883                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
884        NPE_CHECK_RETURN_ZERO(env, jtext);
885
886        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
887        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
888
889        SkPaint::TextBufferDirection tbd = forwards ?
890                                        SkPaint::kForward_TextBufferDirection :
891                                        SkPaint::kBackward_TextBufferDirection;
892
893        int count = env->GetStringLength(jtext);
894        const jchar* text = env->GetStringChars(jtext, NULL);
895        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
896        env->ReleaseStringChars(jtext, text);
897        return count;
898    }
899
900    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
901            const SkPaint& paint, TypefaceImpl* typeface, jint bidiFlags) {
902        SkRect  r;
903        SkIRect ir;
904
905        Layout layout;
906        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
907        layout.doLayout(text, 0, count, count, css);
908        MinikinRect rect;
909        layout.getBounds(&rect);
910        r.fLeft = rect.mLeft;
911        r.fTop = rect.mTop;
912        r.fRight = rect.mRight;
913        r.fBottom = rect.mBottom;
914        r.roundOut(&ir);
915        GraphicsJNI::irect_to_jrect(ir, env, bounds);
916    }
917
918    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
919                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
920        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);;
921        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
922        const jchar* textArray = env->GetStringChars(text, NULL);
923        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
924        env->ReleaseStringChars(text, textArray);
925    }
926
927    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
928                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
929        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
930        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
931        const jchar* textArray = env->GetCharArrayElements(text, NULL);
932        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
933        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
934                                      JNI_ABORT);
935    }
936
937};
938
939static JNINativeMethod methods[] = {
940    {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer},
941    {"native_init","()J", (void*) SkPaintGlue::init},
942    {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint},
943    {"native_reset","(J)V", (void*) SkPaintGlue::reset},
944    {"native_set","(JJ)V", (void*) SkPaintGlue::assign},
945    {"getFlags","()I", (void*) SkPaintGlue::getFlags},
946    {"setFlags","(I)V", (void*) SkPaintGlue::setFlags},
947    {"getHinting","()I", (void*) SkPaintGlue::getHinting},
948    {"setHinting","(I)V", (void*) SkPaintGlue::setHinting},
949    {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias},
950    {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText},
951    {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText},
952    {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText},
953    {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText},
954    {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText},
955    {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap},
956    {"setDither","(Z)V", (void*) SkPaintGlue::setDither},
957    {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle},
958    {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle},
959    {"getColor","()I", (void*) SkPaintGlue::getColor},
960    {"setColor","(I)V", (void*) SkPaintGlue::setColor},
961    {"getAlpha","()I", (void*) SkPaintGlue::getAlpha},
962    {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha},
963    {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth},
964    {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth},
965    {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter},
966    {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter},
967    {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap},
968    {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap},
969    {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin},
970    {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin},
971    {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath},
972    {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader},
973    {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter},
974    {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode},
975    {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect},
976    {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter},
977    {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface},
978    {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer},
979    {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign},
980    {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign},
981    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale},
982    {"isElegantTextHeight","()Z", (void*) SkPaintGlue::isElegantTextHeight},
983    {"setElegantTextHeight","(Z)V", (void*) SkPaintGlue::setElegantTextHeight},
984    {"getTextSize","()F", (void*) SkPaintGlue::getTextSize},
985    {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize},
986    {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX},
987    {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX},
988    {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX},
989    {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX},
990    {"ascent","()F", (void*) SkPaintGlue::ascent},
991    {"descent","()F", (void*) SkPaintGlue::descent},
992    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics},
993    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt},
994    {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII},
995    {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI},
996    {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII},
997    {"native_breakText","(JJ[CIIFI[F)I", (void*) SkPaintGlue::breakTextC},
998    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS},
999    {"native_getTextWidths","(JJ[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F},
1000    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F},
1001    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1002        (void*) SkPaintGlue::getTextRunAdvances___CIIIIZ_FI},
1003    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1004        (void*) SkPaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1005
1006    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C},
1007    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1008        (void*) SkPaintGlue::getTextRunCursor__String},
1009    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C},
1010    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String},
1011    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1012                                        (void*) SkPaintGlue::getStringBounds },
1013    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1014                                    (void*) SkPaintGlue::getCharArrayBounds },
1015    {"native_setShadowLayer", "(JFFFI)V", (void*)SkPaintGlue::setShadowLayer},
1016    {"native_hasShadowLayer", "(J)Z", (void*)SkPaintGlue::hasShadowLayer}
1017};
1018
1019static jfieldID req_fieldID(jfieldID id) {
1020    SkASSERT(id);
1021    return id;
1022}
1023
1024int register_android_graphics_Paint(JNIEnv* env) {
1025    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1026    SkASSERT(gFontMetrics_class);
1027    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1028
1029    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1030    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1031    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1032    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1033    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1034
1035    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1036    SkASSERT(gFontMetricsInt_class);
1037    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1038
1039    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1040    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1041    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1042    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1043    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1044
1045    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1046        sizeof(methods) / sizeof(methods[0]));
1047    return result;
1048}
1049
1050}
1051