Paint.cpp revision d194262f53799ef7cd660729a8f1027263f73e27 
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#include "TextLayout.h"
38
39#ifdef USE_MINIKIN
40#include <minikin/GraphemeBreak.h>
41#include <minikin/Layout.h>
42#include "MinikinSkia.h"
43#include "MinikinUtils.h"
44#endif
45
46// temporary for debugging
47#include <Caches.h>
48#include <utils/Log.h>
49
50namespace android {
51
52struct JMetricsID {
53    jfieldID    top;
54    jfieldID    ascent;
55    jfieldID    descent;
56    jfieldID    bottom;
57    jfieldID    leading;
58};
59
60static jclass   gFontMetrics_class;
61static JMetricsID gFontMetrics_fieldID;
62
63static jclass   gFontMetricsInt_class;
64static JMetricsID gFontMetricsInt_fieldID;
65
66static void defaultSettingsForAndroid(SkPaint* paint) {
67    // GlyphID encoding is required because we are using Harfbuzz shaping
68    paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
69
70    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
71    paintOpts.setUseFontFallbacks(true);
72    paint->setPaintOptionsAndroid(paintOpts);
73}
74
75class SkPaintGlue {
76public:
77    enum MoveOpt {
78        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
79    };
80
81    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
82        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
83        delete obj;
84    }
85
86    static jlong init(JNIEnv* env, jobject clazz) {
87        SkPaint* obj = new SkPaint();
88        defaultSettingsForAndroid(obj);
89        return reinterpret_cast<jlong>(obj);
90    }
91
92    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
93        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
94        SkPaint* obj = new SkPaint(*paint);
95        return reinterpret_cast<jlong>(obj);
96    }
97
98    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
99        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
100        obj->reset();
101        defaultSettingsForAndroid(obj);
102    }
103
104    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
105        SkPaint* dst = reinterpret_cast<SkPaint*>(dstPaintHandle);
106        const SkPaint* src = reinterpret_cast<SkPaint*>(srcPaintHandle);
107        *dst = *src;
108    }
109
110    // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
111    static const uint32_t sFilterBitmapFlag = 0x02;
112
113    static jint getFlags(JNIEnv* env, jobject paint) {
114        NPE_CHECK_RETURN_ZERO(env, paint);
115        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
116        uint32_t result = nativePaint->getFlags();
117        result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away.
118        if (nativePaint->getFilterLevel() != SkPaint::kNone_FilterLevel) {
119            result |= sFilterBitmapFlag;
120        }
121        return static_cast<jint>(result);
122    }
123
124    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
125        NPE_CHECK_RETURN_VOID(env, paint);
126        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
127        // Instead of modifying 0x02, change the filter level.
128        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
129                ? SkPaint::kLow_FilterLevel
130                : SkPaint::kNone_FilterLevel);
131        // Don't pass through filter flag, which is no longer stored in paint's flags.
132        flags &= ~sFilterBitmapFlag;
133        // Use the existing value for 0x02.
134        const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag;
135        flags |= existing0x02Flag;
136        nativePaint->setFlags(flags);
137    }
138
139    static jint getHinting(JNIEnv* env, jobject paint) {
140        NPE_CHECK_RETURN_ZERO(env, paint);
141        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
142                == SkPaint::kNo_Hinting ? 0 : 1;
143    }
144
145    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
146        NPE_CHECK_RETURN_VOID(env, paint);
147        GraphicsJNI::getNativePaint(env, paint)->setHinting(
148                mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting);
149    }
150
151    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
152        NPE_CHECK_RETURN_VOID(env, paint);
153        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
154    }
155
156    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
157        NPE_CHECK_RETURN_VOID(env, paint);
158        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
159    }
160
161    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
162        NPE_CHECK_RETURN_VOID(env, paint);
163        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
164    }
165
166    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
167        NPE_CHECK_RETURN_VOID(env, paint);
168        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
169    }
170
171    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
172        NPE_CHECK_RETURN_VOID(env, paint);
173        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
174    }
175
176    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
177        NPE_CHECK_RETURN_VOID(env, paint);
178        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
179    }
180
181    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
182        NPE_CHECK_RETURN_VOID(env, paint);
183        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
184                filterBitmap ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
185    }
186
187    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
188        NPE_CHECK_RETURN_VOID(env, paint);
189        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
190    }
191
192    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
193        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
194        return static_cast<jint>(obj->getStyle());
195    }
196
197    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
198        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
199        SkPaint::Style style = static_cast<SkPaint::Style>(styleHandle);
200        obj->setStyle(style);
201    }
202
203    static jint getColor(JNIEnv* env, jobject paint) {
204        NPE_CHECK_RETURN_ZERO(env, paint);
205        int color;
206        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
207        return static_cast<jint>(color);
208    }
209
210    static jint getAlpha(JNIEnv* env, jobject paint) {
211        NPE_CHECK_RETURN_ZERO(env, paint);
212        int alpha;
213        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
214        return static_cast<jint>(alpha);
215    }
216
217    static void setColor(JNIEnv* env, jobject paint, jint color) {
218        NPE_CHECK_RETURN_VOID(env, paint);
219        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
220    }
221
222    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
223        NPE_CHECK_RETURN_VOID(env, paint);
224        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
225    }
226
227    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
228        NPE_CHECK_RETURN_ZERO(env, paint);
229        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
230    }
231
232    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
233        NPE_CHECK_RETURN_VOID(env, paint);
234        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
235    }
236
237    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
238        NPE_CHECK_RETURN_ZERO(env, paint);
239        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
240    }
241
242    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
243        NPE_CHECK_RETURN_VOID(env, paint);
244        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
245    }
246
247    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
248        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
249        return static_cast<jint>(obj->getStrokeCap());
250    }
251
252    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
253        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
254        SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle);
255        obj->setStrokeCap(cap);
256    }
257
258    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
259        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
260        return static_cast<jint>(obj->getStrokeJoin());
261    }
262
263    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
264        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
265        SkPaint::Join join = (SkPaint::Join) joinHandle;
266        obj->setStrokeJoin(join);
267    }
268
269    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
270        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
271        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
272        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
273        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
274    }
275
276    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
277        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
278        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
279        return reinterpret_cast<jlong>(obj->setShader(shader));
280    }
281
282    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
283        SkPaint* obj = reinterpret_cast<SkPaint *>(objHandle);
284        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
285        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
286    }
287
288    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
289        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
290        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
291        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
292    }
293
294    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
295        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
296        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
297        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
298    }
299
300    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
301        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
302        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
303        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
304    }
305
306    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
307#ifndef USE_MINIKIN
308        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
309        SkTypeface* typeface = reinterpret_cast<SkTypeface*>(typefaceHandle);
310        return reinterpret_cast<jlong>(obj->setTypeface(typeface));
311#else
312        // TODO(raph): not yet implemented
313        return NULL;
314#endif
315    }
316
317    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
318        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
319        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
320        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
321    }
322
323    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
324        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
325        return static_cast<jint>(obj->getTextAlign());
326    }
327
328    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
329        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
330        SkPaint::Align align = static_cast<SkPaint::Align>(alignHandle);
331        obj->setTextAlign(align);
332    }
333
334    // generate bcp47 identifier for the supplied locale
335    static void toLanguageTag(char* output, size_t outSize,
336            const char* locale) {
337        if (output == NULL || outSize <= 0) {
338            return;
339        }
340        if (locale == NULL) {
341            output[0] = '\0';
342            return;
343        }
344        char canonicalChars[ULOC_FULLNAME_CAPACITY];
345        UErrorCode uErr = U_ZERO_ERROR;
346        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
347                &uErr);
348        if (U_SUCCESS(uErr)) {
349            char likelyChars[ULOC_FULLNAME_CAPACITY];
350            uErr = U_ZERO_ERROR;
351            uloc_addLikelySubtags(canonicalChars, likelyChars,
352                    ULOC_FULLNAME_CAPACITY, &uErr);
353            if (U_SUCCESS(uErr)) {
354                uErr = U_ZERO_ERROR;
355                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
356                if (U_SUCCESS(uErr)) {
357                    return;
358                } else {
359                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
360                            u_errorName(uErr));
361                }
362            } else {
363                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
364                        canonicalChars, u_errorName(uErr));
365            }
366        } else {
367            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
368                    u_errorName(uErr));
369        }
370        // unable to build a proper language identifier
371        output[0] = '\0';
372    }
373
374    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
375        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
376        ScopedUtfChars localeChars(env, locale);
377        char langTag[ULOC_FULLNAME_CAPACITY];
378        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
379
380        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
381        paintOpts.setLanguage(langTag);
382        obj->setPaintOptionsAndroid(paintOpts);
383    }
384
385    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
386        NPE_CHECK_RETURN_ZERO(env, paint);
387        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
388        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
389        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
390    }
391
392    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
393        NPE_CHECK_RETURN_VOID(env, paint);
394        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
395        SkPaintOptionsAndroid::FontVariant variant =
396            aa ? SkPaintOptionsAndroid::kElegant_Variant :
397            SkPaintOptionsAndroid::kDefault_Variant;
398        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
399        paintOpts.setFontVariant(variant);
400        obj->setPaintOptionsAndroid(paintOpts);
401    }
402
403    static jfloat getTextSize(JNIEnv* env, jobject paint) {
404        NPE_CHECK_RETURN_ZERO(env, paint);
405        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
406    }
407
408    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
409        NPE_CHECK_RETURN_VOID(env, paint);
410        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
411    }
412
413    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
414        NPE_CHECK_RETURN_ZERO(env, paint);
415        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
416    }
417
418    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
419        NPE_CHECK_RETURN_VOID(env, paint);
420        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
421    }
422
423    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
424        NPE_CHECK_RETURN_ZERO(env, paint);
425        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
426    }
427
428    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
429        NPE_CHECK_RETURN_VOID(env, paint);
430        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
431    }
432
433    static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, SkPaint::FontMetrics *metrics) {
434        const int kElegantTop = 2500;
435        const int kElegantBottom = -1000;
436        const int kElegantAscent = 1900;
437        const int kElegantDescent = -500;
438        const int kElegantLeading = 0;
439        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
440#ifdef USE_MINIKIN
441        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
442        typeface = TypefaceImpl_resolveDefault(typeface);
443        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
444        float saveSkewX = paint->getTextSkewX();
445        bool savefakeBold = paint->isFakeBoldText();
446        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
447#endif
448        SkScalar spacing = paint->getFontMetrics(metrics);
449#ifdef USE_MINIKIN
450        // The populateSkPaint call may have changed fake bold / text skew
451        // because we want to measure with those effects applied, so now
452        // restore the original settings.
453        paint->setTextSkewX(saveSkewX);
454        paint->setFakeBoldText(savefakeBold);
455#endif
456        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
457        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
458            SkScalar size = paint->getTextSize();
459            metrics->fTop = -size * kElegantTop / 2048;
460            metrics->fBottom = -size * kElegantBottom / 2048;
461            metrics->fAscent = -size * kElegantAscent / 2048;
462            metrics->fDescent = -size * kElegantDescent / 2048;
463            metrics->fLeading = size * kElegantLeading / 2048;
464            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
465        }
466        return spacing;
467    }
468
469    static jfloat ascent(JNIEnv* env, jobject paint) {
470        NPE_CHECK_RETURN_ZERO(env, paint);
471        SkPaint::FontMetrics metrics;
472        getMetricsInternal(env, paint, &metrics);
473        return SkScalarToFloat(metrics.fAscent);
474    }
475
476    static jfloat descent(JNIEnv* env, jobject paint) {
477        NPE_CHECK_RETURN_ZERO(env, paint);
478        SkPaint::FontMetrics metrics;
479        getMetricsInternal(env, paint, &metrics);
480        return SkScalarToFloat(metrics.fDescent);
481    }
482
483    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
484        NPE_CHECK_RETURN_ZERO(env, paint);
485        SkPaint::FontMetrics metrics;
486        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
487
488        if (metricsObj) {
489            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
490            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
491            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
492            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
493            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
494            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
495        }
496        return SkScalarToFloat(spacing);
497    }
498
499    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
500        NPE_CHECK_RETURN_ZERO(env, paint);
501        SkPaint::FontMetrics metrics;
502
503        getMetricsInternal(env, paint, &metrics);
504        int ascent = SkScalarRoundToInt(metrics.fAscent);
505        int descent = SkScalarRoundToInt(metrics.fDescent);
506        int leading = SkScalarRoundToInt(metrics.fLeading);
507
508        if (metricsObj) {
509            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
510            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
511            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
512            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
513            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
514            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
515        }
516        return descent - ascent + leading;
517    }
518
519    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
520            jint bidiFlags) {
521        NPE_CHECK_RETURN_ZERO(env, jpaint);
522        NPE_CHECK_RETURN_ZERO(env, text);
523
524        size_t textLength = env->GetArrayLength(text);
525        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
526            doThrowAIOOBE(env);
527            return 0;
528        }
529        if (count == 0) {
530            return 0;
531        }
532
533        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
534        const jchar* textArray = env->GetCharArrayElements(text, NULL);
535        jfloat result = 0;
536
537#ifdef USE_MINIKIN
538        Layout layout;
539        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
540        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
541        layout.doLayout(textArray, index, count, textLength, css);
542        result = layout.getAdvance();
543#else
544        TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength,
545                bidiFlags, NULL /* dont need all advances */, &result);
546#endif
547
548        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
549        return result;
550    }
551
552    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
553            jint bidiFlags) {
554        NPE_CHECK_RETURN_ZERO(env, jpaint);
555        NPE_CHECK_RETURN_ZERO(env, text);
556
557        size_t textLength = env->GetStringLength(text);
558        int count = end - start;
559        if ((start | count) < 0 || (size_t)end > textLength) {
560            doThrowAIOOBE(env);
561            return 0;
562        }
563        if (count == 0) {
564            return 0;
565        }
566
567        const jchar* textArray = env->GetStringChars(text, NULL);
568        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
569        jfloat width = 0;
570
571#ifdef USE_MINIKIN
572        Layout layout;
573        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
574        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
575        layout.doLayout(textArray, start, count, textLength, css);
576        width = layout.getAdvance();
577#else
578        TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength,
579                bidiFlags, NULL /* dont need all advances */, &width);
580#endif
581
582        env->ReleaseStringChars(text, textArray);
583        return width;
584    }
585
586    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
587        NPE_CHECK_RETURN_ZERO(env, jpaint);
588        NPE_CHECK_RETURN_ZERO(env, text);
589
590        size_t textLength = env->GetStringLength(text);
591        if (textLength == 0) {
592            return 0;
593        }
594
595        const jchar* textArray = env->GetStringChars(text, NULL);
596        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
597        jfloat width = 0;
598
599#ifdef USE_MINIKIN
600        Layout layout;
601        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
602        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
603        layout.doLayout(textArray, 0, textLength, textLength, css);
604        width = layout.getAdvance();
605#else
606        TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength,
607                bidiFlags, NULL /* dont need all advances */, &width);
608#endif
609
610        env->ReleaseStringChars(text, textArray);
611        return width;
612    }
613
614    static int dotextwidths(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar text[], int count,
615            jfloatArray widths, jint bidiFlags) {
616        NPE_CHECK_RETURN_ZERO(env, paint);
617        NPE_CHECK_RETURN_ZERO(env, text);
618
619        if (count < 0 || !widths) {
620            doThrowAIOOBE(env);
621            return 0;
622        }
623        if (count == 0) {
624            return 0;
625        }
626        size_t widthsLength = env->GetArrayLength(widths);
627        if ((size_t)count > widthsLength) {
628            doThrowAIOOBE(env);
629            return 0;
630        }
631
632        AutoJavaFloatArray autoWidths(env, widths, count);
633        jfloat* widthsArray = autoWidths.ptr();
634
635#ifdef USE_MINIKIN
636        Layout layout;
637        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
638        layout.doLayout(text, 0, count, count, css);
639        layout.getAdvances(widthsArray);
640#else
641        TextLayout::getTextRunAdvances(paint, text, 0, count, count,
642                bidiFlags, widthsArray, NULL /* dont need totalAdvance */);
643#endif
644
645        return count;
646    }
647
648    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
649            jint index, jint count, jint bidiFlags, jfloatArray widths) {
650        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
651        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
652        const jchar* textArray = env->GetCharArrayElements(text, NULL);
653        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
654        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
655                                      JNI_ABORT);
656        return count;
657    }
658
659    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
660            jint start, jint end, jint bidiFlags, jfloatArray widths) {
661        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
662        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
663        const jchar* textArray = env->GetStringChars(text, NULL);
664        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
665        env->ReleaseStringChars(text, textArray);
666        return count;
667    }
668
669    static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, TypefaceImpl* typeface, const jchar *text,
670                                    jint start, jint count, jint contextCount, jboolean isRtl,
671                                    jfloatArray advances, jint advancesIndex) {
672        NPE_CHECK_RETURN_ZERO(env, paint);
673        NPE_CHECK_RETURN_ZERO(env, text);
674
675        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
676            doThrowAIOOBE(env);
677            return 0;
678        }
679        if (count == 0) {
680            return 0;
681        }
682        if (advances) {
683            size_t advancesLength = env->GetArrayLength(advances);
684            if ((size_t)count > advancesLength) {
685                doThrowAIOOBE(env);
686                return 0;
687            }
688        }
689        jfloat* advancesArray = new jfloat[count];
690        jfloat totalAdvance = 0;
691
692        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
693
694#ifdef USE_MINIKIN
695        Layout layout;
696        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
697        layout.doLayout(text, start, count, contextCount, css);
698        layout.getAdvances(advancesArray);
699        totalAdvance = layout.getAdvance();
700#else
701        TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, bidiFlags,
702                                       advancesArray, &totalAdvance);
703#endif
704
705        if (advances != NULL) {
706            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
707        }
708        delete [] advancesArray;
709        return totalAdvance;
710    }
711
712    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
713            jlong typefaceHandle,
714            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
715            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
716        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
717        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
718        jchar* textArray = env->GetCharArrayElements(text, NULL);
719        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
720                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
721        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
722        return result;
723    }
724
725    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
726            jlong typefaceHandle,
727            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
728            jfloatArray advances, jint advancesIndex) {
729        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
730        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
731        const jchar* textArray = env->GetStringChars(text, NULL);
732        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
733                start - contextStart, end - start, contextEnd - contextStart, isRtl,
734                advances, advancesIndex);
735        env->ReleaseStringChars(text, textArray);
736        return result;
737    }
738
739    static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start,
740            jint count, jint flags, jint offset, jint opt) {
741#ifdef USE_MINIKIN
742        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
743        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
744        return static_cast<jint>(result);
745#else
746        jfloat scalarArray[count];
747
748        TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags,
749                scalarArray, NULL /* dont need totalAdvance */);
750
751        jint pos = offset - start;
752        switch (opt) {
753        case AFTER:
754          if (pos < count) {
755            pos += 1;
756          }
757          // fall through
758        case AT_OR_AFTER:
759          while (pos < count && scalarArray[pos] == 0) {
760            ++pos;
761          }
762          break;
763        case BEFORE:
764          if (pos > 0) {
765            --pos;
766          }
767          // fall through
768        case AT_OR_BEFORE:
769          while (pos > 0 && scalarArray[pos] == 0) {
770            --pos;
771          }
772          break;
773        case AT:
774        default:
775          if (scalarArray[pos] == 0) {
776            pos = -1;
777          }
778          break;
779        }
780
781        if (pos != -1) {
782          pos += start;
783        }
784
785        return pos;
786#endif
787    }
788
789    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
790            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
791        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
792        jchar* textArray = env->GetCharArrayElements(text, NULL);
793        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
794                offset, cursorOpt);
795        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
796        return result;
797    }
798
799    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
800            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
801        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
802        const jchar* textArray = env->GetStringChars(text, NULL);
803        jint result = doTextRunCursor(env, paint, textArray, contextStart,
804                contextEnd - contextStart, dir, offset, cursorOpt);
805        env->ReleaseStringChars(text, textArray);
806        return result;
807    }
808
809#ifdef USE_MINIKIN
810    class GetTextFunctor {
811    public:
812        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, SkPaint* paint,
813                    uint16_t* glyphs, SkPoint* pos)
814                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
815        }
816
817        void operator()(size_t start, size_t end) {
818            for (size_t i = start; i < end; i++) {
819                glyphs[i] = layout.getGlyphId(i);
820                pos[i].fX = x + layout.getX(i);
821                pos[i].fY = y + layout.getY(i);
822            }
823            if (start == 0) {
824                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
825            } else {
826                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
827                path->addPath(tmpPath);
828            }
829        }
830    private:
831        const Layout& layout;
832        SkPath* path;
833        jfloat x;
834        jfloat y;
835        SkPaint* paint;
836        uint16_t* glyphs;
837        SkPoint* pos;
838        SkPath tmpPath;
839    };
840#endif
841
842    static void getTextPath(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar* text,
843            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
844#ifdef USE_MINIKIN
845        Layout layout;
846        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
847        layout.doLayout(text, 0, count, count, css);
848        size_t nGlyphs = layout.nGlyphs();
849        uint16_t* glyphs = new uint16_t[nGlyphs];
850        SkPoint* pos = new SkPoint[nGlyphs];
851
852        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
853        SkPaint::Align align = paint->getTextAlign();
854        paint->setTextAlign(SkPaint::kLeft_Align);
855        paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
856        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
857        MinikinUtils::forFontRun(layout, paint, f);
858        paint->setTextAlign(align);
859        delete[] glyphs;
860        delete[] pos;
861#else
862        TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path);
863#endif
864    }
865
866    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
867            jlong typefaceHandle, jint bidiFlags,
868            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
869        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
870        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
871        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
872        const jchar* textArray = env->GetCharArrayElements(text, NULL);
873        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
874        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
875    }
876
877    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
878            jlong typefaceHandle, jint bidiFlags,
879            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
880        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
881        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
882        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
883        const jchar* textArray = env->GetStringChars(text, NULL);
884        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
885        env->ReleaseStringChars(text, textArray);
886    }
887
888    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
889                               jfloat dx, jfloat dy, jint color) {
890        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
891        if (radius <= 0) {
892            paint->setLooper(NULL);
893        }
894        else {
895            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
896            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
897        }
898    }
899
900    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
901        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
902        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
903    }
904
905    static int breakText(JNIEnv* env, const SkPaint& paint, TypefaceImpl* typeface, const jchar text[],
906                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
907                         SkPaint::TextBufferDirection textBufferDirection) {
908        size_t measuredCount = 0;
909        float measured = 0;
910
911#ifdef USE_MINIKIN
912        Layout layout;
913        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
914        layout.doLayout(text, 0, count, count, css);
915        float* advances = new float[count];
916        layout.getAdvances(advances);
917        const bool forwardScan = (textBufferDirection == SkPaint::kForward_TextBufferDirection);
918        for (int i = 0; i < count; i++) {
919            // traverse in the given direction
920            int index = forwardScan ? i : (count - i - 1);
921            float width = advances[index];
922            if (measured + width > maxWidth) {
923                break;
924            }
925            // properly handle clusters when scanning backwards
926            if (forwardScan || width != 0.0f) {
927                measuredCount = i + 1;
928            }
929            measured += width;
930        }
931        delete[] advances;
932#else
933        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
934                text, 0, count, count, bidiFlags);
935        if (value == NULL) {
936            return 0;
937        }
938        SkScalar m;
939        size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1,
940                maxWidth, &m, textBufferDirection);
941        SkASSERT((bytes & 1) == 0);
942        measuredCount = bytes >> 1;
943        measured = SkScalarToFloat(m);
944#endif
945
946        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
947            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
948            jfloat* array = autoMeasured.ptr();
949            array[0] = measured;
950        }
951        return measuredCount;
952    }
953
954    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
955            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
956        NPE_CHECK_RETURN_ZERO(env, jtext);
957
958        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
959        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
960
961        SkPaint::TextBufferDirection tbd;
962        if (count < 0) {
963            tbd = SkPaint::kBackward_TextBufferDirection;
964            count = -count;
965        }
966        else {
967            tbd = SkPaint::kForward_TextBufferDirection;
968        }
969
970        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
971            doThrowAIOOBE(env);
972            return 0;
973        }
974
975        const jchar* text = env->GetCharArrayElements(jtext, NULL);
976        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
977                          bidiFlags, jmeasuredWidth, tbd);
978        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
979                                      JNI_ABORT);
980        return count;
981    }
982
983    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
984                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
985        NPE_CHECK_RETURN_ZERO(env, jtext);
986
987        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
988        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
989
990        SkPaint::TextBufferDirection tbd = forwards ?
991                                        SkPaint::kForward_TextBufferDirection :
992                                        SkPaint::kBackward_TextBufferDirection;
993
994        int count = env->GetStringLength(jtext);
995        const jchar* text = env->GetStringChars(jtext, NULL);
996        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
997        env->ReleaseStringChars(jtext, text);
998        return count;
999    }
1000
1001    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
1002            const SkPaint& paint, TypefaceImpl* typeface, jint bidiFlags) {
1003        SkRect  r;
1004        SkIRect ir;
1005
1006#ifdef USE_MINIKIN
1007        Layout layout;
1008        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
1009        layout.doLayout(text, 0, count, count, css);
1010        MinikinRect rect;
1011        layout.getBounds(&rect);
1012        r.fLeft = rect.mLeft;
1013        r.fTop = rect.mTop;
1014        r.fRight = rect.mRight;
1015        r.fBottom = rect.mBottom;
1016#else
1017        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
1018                text, 0, count, count, bidiFlags);
1019        if (value == NULL) {
1020            return;
1021        }
1022        paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r);
1023#endif
1024        r.roundOut(&ir);
1025        GraphicsJNI::irect_to_jrect(ir, env, bounds);
1026    }
1027
1028    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
1029                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
1030        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);;
1031        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
1032        const jchar* textArray = env->GetStringChars(text, NULL);
1033        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
1034        env->ReleaseStringChars(text, textArray);
1035    }
1036
1037    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
1038                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
1039        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
1040        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
1041        const jchar* textArray = env->GetCharArrayElements(text, NULL);
1042        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
1043        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
1044                                      JNI_ABORT);
1045    }
1046
1047};
1048
1049static JNINativeMethod methods[] = {
1050    {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer},
1051    {"native_init","()J", (void*) SkPaintGlue::init},
1052    {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint},
1053    {"native_reset","(J)V", (void*) SkPaintGlue::reset},
1054    {"native_set","(JJ)V", (void*) SkPaintGlue::assign},
1055    {"getFlags","()I", (void*) SkPaintGlue::getFlags},
1056    {"setFlags","(I)V", (void*) SkPaintGlue::setFlags},
1057    {"getHinting","()I", (void*) SkPaintGlue::getHinting},
1058    {"setHinting","(I)V", (void*) SkPaintGlue::setHinting},
1059    {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias},
1060    {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText},
1061    {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText},
1062    {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText},
1063    {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText},
1064    {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText},
1065    {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap},
1066    {"setDither","(Z)V", (void*) SkPaintGlue::setDither},
1067    {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle},
1068    {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle},
1069    {"getColor","()I", (void*) SkPaintGlue::getColor},
1070    {"setColor","(I)V", (void*) SkPaintGlue::setColor},
1071    {"getAlpha","()I", (void*) SkPaintGlue::getAlpha},
1072    {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha},
1073    {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth},
1074    {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth},
1075    {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter},
1076    {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter},
1077    {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap},
1078    {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap},
1079    {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin},
1080    {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin},
1081    {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath},
1082    {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader},
1083    {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter},
1084    {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode},
1085    {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect},
1086    {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter},
1087    {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface},
1088    {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer},
1089    {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign},
1090    {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign},
1091    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale},
1092    {"isElegantTextHeight","()Z", (void*) SkPaintGlue::isElegantTextHeight},
1093    {"setElegantTextHeight","(Z)V", (void*) SkPaintGlue::setElegantTextHeight},
1094    {"getTextSize","()F", (void*) SkPaintGlue::getTextSize},
1095    {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize},
1096    {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX},
1097    {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX},
1098    {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX},
1099    {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX},
1100    {"ascent","()F", (void*) SkPaintGlue::ascent},
1101    {"descent","()F", (void*) SkPaintGlue::descent},
1102    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics},
1103    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt},
1104    {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII},
1105    {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI},
1106    {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII},
1107    {"native_breakText","(JJ[CIIFI[F)I", (void*) SkPaintGlue::breakTextC},
1108    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS},
1109    {"native_getTextWidths","(JJ[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F},
1110    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F},
1111    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1112        (void*) SkPaintGlue::getTextRunAdvances___CIIIIZ_FI},
1113    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1114        (void*) SkPaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1115
1116    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C},
1117    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1118        (void*) SkPaintGlue::getTextRunCursor__String},
1119    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C},
1120    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String},
1121    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1122                                        (void*) SkPaintGlue::getStringBounds },
1123    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1124                                    (void*) SkPaintGlue::getCharArrayBounds },
1125    {"native_setShadowLayer", "(JFFFI)V", (void*)SkPaintGlue::setShadowLayer},
1126    {"native_hasShadowLayer", "(J)Z", (void*)SkPaintGlue::hasShadowLayer}
1127};
1128
1129static jfieldID req_fieldID(jfieldID id) {
1130    SkASSERT(id);
1131    return id;
1132}
1133
1134int register_android_graphics_Paint(JNIEnv* env) {
1135    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1136    SkASSERT(gFontMetrics_class);
1137    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1138
1139    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1140    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1141    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1142    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1143    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1144
1145    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1146    SkASSERT(gFontMetricsInt_class);
1147    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1148
1149    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1150    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1151    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1152    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1153    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1154
1155    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1156        sizeof(methods) / sizeof(methods[0]));
1157    return result;
1158}
1159
1160}
1161