Paint.cpp revision 3660789f06c5fbcb81e6c7c79612048bff8f0f66 
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
43// temporary for debugging
44#include <Caches.h>
45#include <utils/Log.h>
46
47namespace android {
48
49struct JMetricsID {
50    jfieldID    top;
51    jfieldID    ascent;
52    jfieldID    descent;
53    jfieldID    bottom;
54    jfieldID    leading;
55};
56
57static jclass   gFontMetrics_class;
58static JMetricsID gFontMetrics_fieldID;
59
60static jclass   gFontMetricsInt_class;
61static JMetricsID gFontMetricsInt_fieldID;
62
63static void defaultSettingsForAndroid(SkPaint* paint) {
64    // GlyphID encoding is required because we are using Harfbuzz shaping
65    paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
66
67    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
68    paintOpts.setUseFontFallbacks(true);
69    paint->setPaintOptionsAndroid(paintOpts);
70}
71
72class SkPaintGlue {
73public:
74    enum MoveOpt {
75        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
76    };
77
78    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
79        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
80        delete obj;
81    }
82
83    static jlong init(JNIEnv* env, jobject clazz) {
84        SkPaint* obj = new SkPaint();
85        defaultSettingsForAndroid(obj);
86        return reinterpret_cast<jlong>(obj);
87    }
88
89    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
90        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
91        SkPaint* obj = new SkPaint(*paint);
92        return reinterpret_cast<jlong>(obj);
93    }
94
95    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
96        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
97        obj->reset();
98        defaultSettingsForAndroid(obj);
99    }
100
101    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
102        SkPaint* dst = reinterpret_cast<SkPaint*>(dstPaintHandle);
103        const SkPaint* src = reinterpret_cast<SkPaint*>(srcPaintHandle);
104        *dst = *src;
105    }
106
107    // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
108    static const uint32_t sFilterBitmapFlag = 0x02;
109
110    static jint getFlags(JNIEnv* env, jobject paint) {
111        NPE_CHECK_RETURN_ZERO(env, paint);
112        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
113        uint32_t result = nativePaint->getFlags();
114        result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away.
115        if (nativePaint->getFilterLevel() != SkPaint::kNone_FilterLevel) {
116            result |= sFilterBitmapFlag;
117        }
118        return static_cast<jint>(result);
119    }
120
121    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
122        NPE_CHECK_RETURN_VOID(env, paint);
123        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
124        // Instead of modifying 0x02, change the filter level.
125        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
126                ? SkPaint::kLow_FilterLevel
127                : SkPaint::kNone_FilterLevel);
128        // Don't pass through filter flag, which is no longer stored in paint's flags.
129        flags &= ~sFilterBitmapFlag;
130        // Use the existing value for 0x02.
131        const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag;
132        flags |= existing0x02Flag;
133        nativePaint->setFlags(flags);
134    }
135
136    static jint getHinting(JNIEnv* env, jobject paint) {
137        NPE_CHECK_RETURN_ZERO(env, paint);
138        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
139                == SkPaint::kNo_Hinting ? 0 : 1;
140    }
141
142    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
143        NPE_CHECK_RETURN_VOID(env, paint);
144        GraphicsJNI::getNativePaint(env, paint)->setHinting(
145                mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting);
146    }
147
148    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
149        NPE_CHECK_RETURN_VOID(env, paint);
150        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
151    }
152
153    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
154        NPE_CHECK_RETURN_VOID(env, paint);
155        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
156    }
157
158    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
159        NPE_CHECK_RETURN_VOID(env, paint);
160        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
161    }
162
163    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
164        NPE_CHECK_RETURN_VOID(env, paint);
165        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
166    }
167
168    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
169        NPE_CHECK_RETURN_VOID(env, paint);
170        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
171    }
172
173    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
174        NPE_CHECK_RETURN_VOID(env, paint);
175        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
176    }
177
178    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
179        NPE_CHECK_RETURN_VOID(env, paint);
180        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
181                filterBitmap ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
182    }
183
184    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
185        NPE_CHECK_RETURN_VOID(env, paint);
186        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
187    }
188
189    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
190        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
191        return static_cast<jint>(obj->getStyle());
192    }
193
194    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
195        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
196        SkPaint::Style style = static_cast<SkPaint::Style>(styleHandle);
197        obj->setStyle(style);
198    }
199
200    static jint getColor(JNIEnv* env, jobject paint) {
201        NPE_CHECK_RETURN_ZERO(env, paint);
202        int color;
203        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
204        return static_cast<jint>(color);
205    }
206
207    static jint getAlpha(JNIEnv* env, jobject paint) {
208        NPE_CHECK_RETURN_ZERO(env, paint);
209        int alpha;
210        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
211        return static_cast<jint>(alpha);
212    }
213
214    static void setColor(JNIEnv* env, jobject paint, jint color) {
215        NPE_CHECK_RETURN_VOID(env, paint);
216        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
217    }
218
219    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
220        NPE_CHECK_RETURN_VOID(env, paint);
221        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
222    }
223
224    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
225        NPE_CHECK_RETURN_ZERO(env, paint);
226        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
227    }
228
229    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
230        NPE_CHECK_RETURN_VOID(env, paint);
231        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
232    }
233
234    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
235        NPE_CHECK_RETURN_ZERO(env, paint);
236        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
237    }
238
239    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
240        NPE_CHECK_RETURN_VOID(env, paint);
241        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
242    }
243
244    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
245        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
246        return static_cast<jint>(obj->getStrokeCap());
247    }
248
249    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
250        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
251        SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle);
252        obj->setStrokeCap(cap);
253    }
254
255    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
256        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
257        return static_cast<jint>(obj->getStrokeJoin());
258    }
259
260    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
261        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
262        SkPaint::Join join = (SkPaint::Join) joinHandle;
263        obj->setStrokeJoin(join);
264    }
265
266    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
267        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
268        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
269        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
270        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
271    }
272
273    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
274        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
275        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
276        return reinterpret_cast<jlong>(obj->setShader(shader));
277    }
278
279    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
280        SkPaint* obj = reinterpret_cast<SkPaint *>(objHandle);
281        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
282        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
283    }
284
285    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
286        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
287        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
288        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
289    }
290
291    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
292        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
293        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
294        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
295    }
296
297    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
298        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
299        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
300        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
301    }
302
303    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
304        // TODO: in Paint refactoring, set typeface on android Paint, not SkPaint
305        return NULL;
306    }
307
308    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
309        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
310        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
311        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
312    }
313
314    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
315        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
316        return static_cast<jint>(obj->getTextAlign());
317    }
318
319    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
320        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
321        SkPaint::Align align = static_cast<SkPaint::Align>(alignHandle);
322        obj->setTextAlign(align);
323    }
324
325    // generate bcp47 identifier for the supplied locale
326    static void toLanguageTag(char* output, size_t outSize,
327            const char* locale) {
328        if (output == NULL || outSize <= 0) {
329            return;
330        }
331        if (locale == NULL) {
332            output[0] = '\0';
333            return;
334        }
335        char canonicalChars[ULOC_FULLNAME_CAPACITY];
336        UErrorCode uErr = U_ZERO_ERROR;
337        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
338                &uErr);
339        if (U_SUCCESS(uErr)) {
340            char likelyChars[ULOC_FULLNAME_CAPACITY];
341            uErr = U_ZERO_ERROR;
342            uloc_addLikelySubtags(canonicalChars, likelyChars,
343                    ULOC_FULLNAME_CAPACITY, &uErr);
344            if (U_SUCCESS(uErr)) {
345                uErr = U_ZERO_ERROR;
346                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
347                if (U_SUCCESS(uErr)) {
348                    return;
349                } else {
350                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
351                            u_errorName(uErr));
352                }
353            } else {
354                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
355                        canonicalChars, u_errorName(uErr));
356            }
357        } else {
358            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
359                    u_errorName(uErr));
360        }
361        // unable to build a proper language identifier
362        output[0] = '\0';
363    }
364
365    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
366        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
367        ScopedUtfChars localeChars(env, locale);
368        char langTag[ULOC_FULLNAME_CAPACITY];
369        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
370
371        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
372        paintOpts.setLanguage(langTag);
373        obj->setPaintOptionsAndroid(paintOpts);
374    }
375
376    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
377        NPE_CHECK_RETURN_ZERO(env, paint);
378        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
379        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
380        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
381    }
382
383    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
384        NPE_CHECK_RETURN_VOID(env, paint);
385        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
386        SkPaintOptionsAndroid::FontVariant variant =
387            aa ? SkPaintOptionsAndroid::kElegant_Variant :
388            SkPaintOptionsAndroid::kDefault_Variant;
389        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
390        paintOpts.setFontVariant(variant);
391        obj->setPaintOptionsAndroid(paintOpts);
392    }
393
394    static jfloat getTextSize(JNIEnv* env, jobject paint) {
395        NPE_CHECK_RETURN_ZERO(env, paint);
396        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
397    }
398
399    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
400        NPE_CHECK_RETURN_VOID(env, paint);
401        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
402    }
403
404    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
405        NPE_CHECK_RETURN_ZERO(env, paint);
406        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
407    }
408
409    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
410        NPE_CHECK_RETURN_VOID(env, paint);
411        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
412    }
413
414    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
415        NPE_CHECK_RETURN_ZERO(env, paint);
416        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
417    }
418
419    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
420        NPE_CHECK_RETURN_VOID(env, paint);
421        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
422    }
423
424    static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, SkPaint::FontMetrics *metrics) {
425        const int kElegantTop = 2500;
426        const int kElegantBottom = -1000;
427        const int kElegantAscent = 1900;
428        const int kElegantDescent = -500;
429        const int kElegantLeading = 0;
430        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
431        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
432        typeface = TypefaceImpl_resolveDefault(typeface);
433        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
434        float saveSkewX = paint->getTextSkewX();
435        bool savefakeBold = paint->isFakeBoldText();
436        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
437        SkScalar spacing = paint->getFontMetrics(metrics);
438        // The populateSkPaint call may have changed fake bold / text skew
439        // because we want to measure with those effects applied, so now
440        // restore the original settings.
441        paint->setTextSkewX(saveSkewX);
442        paint->setFakeBoldText(savefakeBold);
443        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
444        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
445            SkScalar size = paint->getTextSize();
446            metrics->fTop = -size * kElegantTop / 2048;
447            metrics->fBottom = -size * kElegantBottom / 2048;
448            metrics->fAscent = -size * kElegantAscent / 2048;
449            metrics->fDescent = -size * kElegantDescent / 2048;
450            metrics->fLeading = size * kElegantLeading / 2048;
451            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
452        }
453        return spacing;
454    }
455
456    static jfloat ascent(JNIEnv* env, jobject paint) {
457        NPE_CHECK_RETURN_ZERO(env, paint);
458        SkPaint::FontMetrics metrics;
459        getMetricsInternal(env, paint, &metrics);
460        return SkScalarToFloat(metrics.fAscent);
461    }
462
463    static jfloat descent(JNIEnv* env, jobject paint) {
464        NPE_CHECK_RETURN_ZERO(env, paint);
465        SkPaint::FontMetrics metrics;
466        getMetricsInternal(env, paint, &metrics);
467        return SkScalarToFloat(metrics.fDescent);
468    }
469
470    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
471        NPE_CHECK_RETURN_ZERO(env, paint);
472        SkPaint::FontMetrics metrics;
473        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
474
475        if (metricsObj) {
476            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
477            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
478            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
479            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
480            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
481            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
482        }
483        return SkScalarToFloat(spacing);
484    }
485
486    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
487        NPE_CHECK_RETURN_ZERO(env, paint);
488        SkPaint::FontMetrics metrics;
489
490        getMetricsInternal(env, paint, &metrics);
491        int ascent = SkScalarRoundToInt(metrics.fAscent);
492        int descent = SkScalarRoundToInt(metrics.fDescent);
493        int leading = SkScalarRoundToInt(metrics.fLeading);
494
495        if (metricsObj) {
496            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
497            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
498            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
499            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
500            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
501            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
502        }
503        return descent - ascent + leading;
504    }
505
506    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
507            jint bidiFlags) {
508        NPE_CHECK_RETURN_ZERO(env, jpaint);
509        NPE_CHECK_RETURN_ZERO(env, text);
510
511        size_t textLength = env->GetArrayLength(text);
512        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
513            doThrowAIOOBE(env);
514            return 0;
515        }
516        if (count == 0) {
517            return 0;
518        }
519
520        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
521        const jchar* textArray = env->GetCharArrayElements(text, NULL);
522        jfloat result = 0;
523
524        Layout layout;
525        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
526        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
527        layout.doLayout(textArray, index, count, textLength, css);
528        result = layout.getAdvance();
529        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
530        return result;
531    }
532
533    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
534            jint bidiFlags) {
535        NPE_CHECK_RETURN_ZERO(env, jpaint);
536        NPE_CHECK_RETURN_ZERO(env, text);
537
538        size_t textLength = env->GetStringLength(text);
539        int count = end - start;
540        if ((start | count) < 0 || (size_t)end > textLength) {
541            doThrowAIOOBE(env);
542            return 0;
543        }
544        if (count == 0) {
545            return 0;
546        }
547
548        const jchar* textArray = env->GetStringChars(text, NULL);
549        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
550        jfloat width = 0;
551
552        Layout layout;
553        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
554        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
555        layout.doLayout(textArray, start, count, textLength, css);
556        width = layout.getAdvance();
557
558        env->ReleaseStringChars(text, textArray);
559        return width;
560    }
561
562    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
563        NPE_CHECK_RETURN_ZERO(env, jpaint);
564        NPE_CHECK_RETURN_ZERO(env, text);
565
566        size_t textLength = env->GetStringLength(text);
567        if (textLength == 0) {
568            return 0;
569        }
570
571        const jchar* textArray = env->GetStringChars(text, NULL);
572        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
573        jfloat width = 0;
574
575        Layout layout;
576        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
577        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
578        layout.doLayout(textArray, 0, textLength, textLength, css);
579        width = layout.getAdvance();
580
581        env->ReleaseStringChars(text, textArray);
582        return width;
583    }
584
585    static int dotextwidths(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar text[], int count,
586            jfloatArray widths, jint bidiFlags) {
587        NPE_CHECK_RETURN_ZERO(env, paint);
588        NPE_CHECK_RETURN_ZERO(env, text);
589
590        if (count < 0 || !widths) {
591            doThrowAIOOBE(env);
592            return 0;
593        }
594        if (count == 0) {
595            return 0;
596        }
597        size_t widthsLength = env->GetArrayLength(widths);
598        if ((size_t)count > widthsLength) {
599            doThrowAIOOBE(env);
600            return 0;
601        }
602
603        AutoJavaFloatArray autoWidths(env, widths, count);
604        jfloat* widthsArray = autoWidths.ptr();
605
606        Layout layout;
607        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
608        layout.doLayout(text, 0, count, count, css);
609        layout.getAdvances(widthsArray);
610
611        return count;
612    }
613
614    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
615            jint index, jint count, jint bidiFlags, jfloatArray widths) {
616        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
617        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
618        const jchar* textArray = env->GetCharArrayElements(text, NULL);
619        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
620        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
621                                      JNI_ABORT);
622        return count;
623    }
624
625    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
626            jint start, jint end, jint bidiFlags, jfloatArray widths) {
627        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
628        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
629        const jchar* textArray = env->GetStringChars(text, NULL);
630        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
631        env->ReleaseStringChars(text, textArray);
632        return count;
633    }
634
635    static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, TypefaceImpl* typeface, const jchar *text,
636                                    jint start, jint count, jint contextCount, jboolean isRtl,
637                                    jfloatArray advances, jint advancesIndex) {
638        NPE_CHECK_RETURN_ZERO(env, paint);
639        NPE_CHECK_RETURN_ZERO(env, text);
640
641        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
642            doThrowAIOOBE(env);
643            return 0;
644        }
645        if (count == 0) {
646            return 0;
647        }
648        if (advances) {
649            size_t advancesLength = env->GetArrayLength(advances);
650            if ((size_t)count > advancesLength) {
651                doThrowAIOOBE(env);
652                return 0;
653            }
654        }
655        jfloat* advancesArray = new jfloat[count];
656        jfloat totalAdvance = 0;
657
658        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
659
660        Layout layout;
661        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
662        layout.doLayout(text, start, count, contextCount, css);
663        layout.getAdvances(advancesArray);
664        totalAdvance = layout.getAdvance();
665
666        if (advances != NULL) {
667            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
668        }
669        delete [] advancesArray;
670        return totalAdvance;
671    }
672
673    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
674            jlong typefaceHandle,
675            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
676            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
677        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
678        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
679        jchar* textArray = env->GetCharArrayElements(text, NULL);
680        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
681                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
682        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
683        return result;
684    }
685
686    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
687            jlong typefaceHandle,
688            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
689            jfloatArray advances, jint advancesIndex) {
690        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
691        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
692        const jchar* textArray = env->GetStringChars(text, NULL);
693        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
694                start - contextStart, end - start, contextEnd - contextStart, isRtl,
695                advances, advancesIndex);
696        env->ReleaseStringChars(text, textArray);
697        return result;
698    }
699
700    static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start,
701            jint count, jint flags, jint offset, jint opt) {
702        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
703        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
704        return static_cast<jint>(result);
705    }
706
707    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
708            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
709        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
710        jchar* textArray = env->GetCharArrayElements(text, NULL);
711        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
712                offset, cursorOpt);
713        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
714        return result;
715    }
716
717    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
718            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
719        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
720        const jchar* textArray = env->GetStringChars(text, NULL);
721        jint result = doTextRunCursor(env, paint, textArray, contextStart,
722                contextEnd - contextStart, dir, offset, cursorOpt);
723        env->ReleaseStringChars(text, textArray);
724        return result;
725    }
726
727    class GetTextFunctor {
728    public:
729        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, SkPaint* paint,
730                    uint16_t* glyphs, SkPoint* pos)
731                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
732        }
733
734        void operator()(size_t start, size_t end) {
735            for (size_t i = start; i < end; i++) {
736                glyphs[i] = layout.getGlyphId(i);
737                pos[i].fX = x + layout.getX(i);
738                pos[i].fY = y + layout.getY(i);
739            }
740            if (start == 0) {
741                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
742            } else {
743                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
744                path->addPath(tmpPath);
745            }
746        }
747    private:
748        const Layout& layout;
749        SkPath* path;
750        jfloat x;
751        jfloat y;
752        SkPaint* paint;
753        uint16_t* glyphs;
754        SkPoint* pos;
755        SkPath tmpPath;
756    };
757
758    static void getTextPath(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar* text,
759            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
760        Layout layout;
761        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
762        layout.doLayout(text, 0, count, count, css);
763        size_t nGlyphs = layout.nGlyphs();
764        uint16_t* glyphs = new uint16_t[nGlyphs];
765        SkPoint* pos = new SkPoint[nGlyphs];
766
767        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
768        SkPaint::Align align = paint->getTextAlign();
769        paint->setTextAlign(SkPaint::kLeft_Align);
770        paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
771        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
772        MinikinUtils::forFontRun(layout, paint, f);
773        paint->setTextAlign(align);
774        delete[] glyphs;
775        delete[] pos;
776    }
777
778    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
779            jlong typefaceHandle, jint bidiFlags,
780            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
781        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
782        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
783        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
784        const jchar* textArray = env->GetCharArrayElements(text, NULL);
785        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
786        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
787    }
788
789    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
790            jlong typefaceHandle, jint bidiFlags,
791            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
792        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
793        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
794        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
795        const jchar* textArray = env->GetStringChars(text, NULL);
796        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
797        env->ReleaseStringChars(text, textArray);
798    }
799
800    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
801                               jfloat dx, jfloat dy, jint color) {
802        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
803        if (radius <= 0) {
804            paint->setLooper(NULL);
805        }
806        else {
807            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
808            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
809        }
810    }
811
812    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
813        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
814        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
815    }
816
817    static int breakText(JNIEnv* env, const SkPaint& paint, TypefaceImpl* typeface, const jchar text[],
818                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
819                         SkPaint::TextBufferDirection textBufferDirection) {
820        size_t measuredCount = 0;
821        float measured = 0;
822
823        Layout layout;
824        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
825        layout.doLayout(text, 0, count, count, css);
826        float* advances = new float[count];
827        layout.getAdvances(advances);
828        const bool forwardScan = (textBufferDirection == SkPaint::kForward_TextBufferDirection);
829        for (int i = 0; i < count; i++) {
830            // traverse in the given direction
831            int index = forwardScan ? i : (count - i - 1);
832            float width = advances[index];
833            if (measured + width > maxWidth) {
834                break;
835            }
836            // properly handle clusters when scanning backwards
837            if (forwardScan || width != 0.0f) {
838                measuredCount = i + 1;
839            }
840            measured += width;
841        }
842        delete[] advances;
843
844        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
845            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
846            jfloat* array = autoMeasured.ptr();
847            array[0] = measured;
848        }
849        return measuredCount;
850    }
851
852    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
853            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
854        NPE_CHECK_RETURN_ZERO(env, jtext);
855
856        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
857        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
858
859        SkPaint::TextBufferDirection tbd;
860        if (count < 0) {
861            tbd = SkPaint::kBackward_TextBufferDirection;
862            count = -count;
863        }
864        else {
865            tbd = SkPaint::kForward_TextBufferDirection;
866        }
867
868        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
869            doThrowAIOOBE(env);
870            return 0;
871        }
872
873        const jchar* text = env->GetCharArrayElements(jtext, NULL);
874        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
875                          bidiFlags, jmeasuredWidth, tbd);
876        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
877                                      JNI_ABORT);
878        return count;
879    }
880
881    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
882                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
883        NPE_CHECK_RETURN_ZERO(env, jtext);
884
885        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
886        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
887
888        SkPaint::TextBufferDirection tbd = forwards ?
889                                        SkPaint::kForward_TextBufferDirection :
890                                        SkPaint::kBackward_TextBufferDirection;
891
892        int count = env->GetStringLength(jtext);
893        const jchar* text = env->GetStringChars(jtext, NULL);
894        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
895        env->ReleaseStringChars(jtext, text);
896        return count;
897    }
898
899    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
900            const SkPaint& paint, TypefaceImpl* typeface, jint bidiFlags) {
901        SkRect  r;
902        SkIRect ir;
903
904        Layout layout;
905        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
906        layout.doLayout(text, 0, count, count, css);
907        MinikinRect rect;
908        layout.getBounds(&rect);
909        r.fLeft = rect.mLeft;
910        r.fTop = rect.mTop;
911        r.fRight = rect.mRight;
912        r.fBottom = rect.mBottom;
913        r.roundOut(&ir);
914        GraphicsJNI::irect_to_jrect(ir, env, bounds);
915    }
916
917    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
918                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
919        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);;
920        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
921        const jchar* textArray = env->GetStringChars(text, NULL);
922        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
923        env->ReleaseStringChars(text, textArray);
924    }
925
926    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
927                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
928        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
929        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
930        const jchar* textArray = env->GetCharArrayElements(text, NULL);
931        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
932        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
933                                      JNI_ABORT);
934    }
935
936};
937
938static JNINativeMethod methods[] = {
939    {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer},
940    {"native_init","()J", (void*) SkPaintGlue::init},
941    {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint},
942    {"native_reset","(J)V", (void*) SkPaintGlue::reset},
943    {"native_set","(JJ)V", (void*) SkPaintGlue::assign},
944    {"getFlags","()I", (void*) SkPaintGlue::getFlags},
945    {"setFlags","(I)V", (void*) SkPaintGlue::setFlags},
946    {"getHinting","()I", (void*) SkPaintGlue::getHinting},
947    {"setHinting","(I)V", (void*) SkPaintGlue::setHinting},
948    {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias},
949    {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText},
950    {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText},
951    {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText},
952    {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText},
953    {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText},
954    {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap},
955    {"setDither","(Z)V", (void*) SkPaintGlue::setDither},
956    {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle},
957    {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle},
958    {"getColor","()I", (void*) SkPaintGlue::getColor},
959    {"setColor","(I)V", (void*) SkPaintGlue::setColor},
960    {"getAlpha","()I", (void*) SkPaintGlue::getAlpha},
961    {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha},
962    {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth},
963    {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth},
964    {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter},
965    {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter},
966    {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap},
967    {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap},
968    {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin},
969    {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin},
970    {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath},
971    {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader},
972    {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter},
973    {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode},
974    {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect},
975    {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter},
976    {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface},
977    {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer},
978    {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign},
979    {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign},
980    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale},
981    {"isElegantTextHeight","()Z", (void*) SkPaintGlue::isElegantTextHeight},
982    {"setElegantTextHeight","(Z)V", (void*) SkPaintGlue::setElegantTextHeight},
983    {"getTextSize","()F", (void*) SkPaintGlue::getTextSize},
984    {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize},
985    {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX},
986    {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX},
987    {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX},
988    {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX},
989    {"ascent","()F", (void*) SkPaintGlue::ascent},
990    {"descent","()F", (void*) SkPaintGlue::descent},
991    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics},
992    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt},
993    {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII},
994    {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI},
995    {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII},
996    {"native_breakText","(JJ[CIIFI[F)I", (void*) SkPaintGlue::breakTextC},
997    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS},
998    {"native_getTextWidths","(JJ[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F},
999    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F},
1000    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1001        (void*) SkPaintGlue::getTextRunAdvances___CIIIIZ_FI},
1002    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1003        (void*) SkPaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1004
1005    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C},
1006    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1007        (void*) SkPaintGlue::getTextRunCursor__String},
1008    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C},
1009    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String},
1010    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1011                                        (void*) SkPaintGlue::getStringBounds },
1012    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1013                                    (void*) SkPaintGlue::getCharArrayBounds },
1014    {"native_setShadowLayer", "(JFFFI)V", (void*)SkPaintGlue::setShadowLayer},
1015    {"native_hasShadowLayer", "(J)Z", (void*)SkPaintGlue::hasShadowLayer}
1016};
1017
1018static jfieldID req_fieldID(jfieldID id) {
1019    SkASSERT(id);
1020    return id;
1021}
1022
1023int register_android_graphics_Paint(JNIEnv* env) {
1024    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1025    SkASSERT(gFontMetrics_class);
1026    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1027
1028    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1029    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1030    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1031    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1032    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1033
1034    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1035    SkASSERT(gFontMetricsInt_class);
1036    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1037
1038    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1039    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1040    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1041    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1042    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1043
1044    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1045        sizeof(methods) / sizeof(methods[0]));
1046    return result;
1047}
1048
1049}
1050