Paint.cpp revision 63c5c78a72a21d57913e8601cc2a1ab72a424a02 
1/* libs/android_runtime/android/graphics/Paint.cpp
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "Paint"
19
20#include <utils/Log.h>
21
22#include "jni.h"
23#include "GraphicsJNI.h"
24#include <android_runtime/AndroidRuntime.h>
25#include <ScopedUtfChars.h>
26
27#include "SkBlurDrawLooper.h"
28#include "SkColorFilter.h"
29#include "SkMaskFilter.h"
30#include "SkRasterizer.h"
31#include "SkShader.h"
32#include "SkTypeface.h"
33#include "SkXfermode.h"
34#include "unicode/uloc.h"
35#include "unicode/ushape.h"
36#include "utils/Blur.h"
37
38#include <minikin/GraphemeBreak.h>
39#include <minikin/Layout.h>
40#include "MinikinSkia.h"
41#include "MinikinUtils.h"
42#include "Paint.h"
43#include "TypefaceImpl.h"
44
45// temporary for debugging
46#include <Caches.h>
47#include <utils/Log.h>
48
49namespace android {
50
51struct JMetricsID {
52    jfieldID    top;
53    jfieldID    ascent;
54    jfieldID    descent;
55    jfieldID    bottom;
56    jfieldID    leading;
57};
58
59static jclass   gFontMetrics_class;
60static JMetricsID gFontMetrics_fieldID;
61
62static jclass   gFontMetricsInt_class;
63static JMetricsID gFontMetricsInt_fieldID;
64
65static void defaultSettingsForAndroid(Paint* paint) {
66    // GlyphID encoding is required because we are using Harfbuzz shaping
67    paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
68
69    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
70    paintOpts.setUseFontFallbacks(true);
71    paint->setPaintOptionsAndroid(paintOpts);
72}
73
74class PaintGlue {
75public:
76    enum MoveOpt {
77        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
78    };
79
80    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
81        Paint* obj = reinterpret_cast<Paint*>(objHandle);
82        delete obj;
83    }
84
85    static jlong init(JNIEnv* env, jobject clazz) {
86        Paint* obj = new Paint();
87        defaultSettingsForAndroid(obj);
88        return reinterpret_cast<jlong>(obj);
89    }
90
91    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
92        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
93        Paint* obj = new Paint(*paint);
94        return reinterpret_cast<jlong>(obj);
95    }
96
97    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
98        Paint* obj = reinterpret_cast<Paint*>(objHandle);
99        obj->reset();
100        defaultSettingsForAndroid(obj);
101    }
102
103    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
104        Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle);
105        const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle);
106        *dst = *src;
107    }
108
109    // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
110    static const uint32_t sFilterBitmapFlag = 0x02;
111
112    static jint getFlags(JNIEnv* env, jobject paint) {
113        NPE_CHECK_RETURN_ZERO(env, paint);
114        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
115        uint32_t result = nativePaint->getFlags();
116        result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away.
117        if (nativePaint->getFilterLevel() != Paint::kNone_FilterLevel) {
118            result |= sFilterBitmapFlag;
119        }
120        return static_cast<jint>(result);
121    }
122
123    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
124        NPE_CHECK_RETURN_VOID(env, paint);
125        Paint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
126        // Instead of modifying 0x02, change the filter level.
127        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
128                ? Paint::kLow_FilterLevel
129                : Paint::kNone_FilterLevel);
130        // Don't pass through filter flag, which is no longer stored in paint's flags.
131        flags &= ~sFilterBitmapFlag;
132        // Use the existing value for 0x02.
133        const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag;
134        flags |= existing0x02Flag;
135        nativePaint->setFlags(flags);
136    }
137
138    static jint getHinting(JNIEnv* env, jobject paint) {
139        NPE_CHECK_RETURN_ZERO(env, paint);
140        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
141                == Paint::kNo_Hinting ? 0 : 1;
142    }
143
144    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
145        NPE_CHECK_RETURN_VOID(env, paint);
146        GraphicsJNI::getNativePaint(env, paint)->setHinting(
147                mode == 0 ? Paint::kNo_Hinting : Paint::kNormal_Hinting);
148    }
149
150    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
151        NPE_CHECK_RETURN_VOID(env, paint);
152        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
153    }
154
155    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
156        NPE_CHECK_RETURN_VOID(env, paint);
157        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
158    }
159
160    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
161        NPE_CHECK_RETURN_VOID(env, paint);
162        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
163    }
164
165    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
166        NPE_CHECK_RETURN_VOID(env, paint);
167        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
168    }
169
170    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
171        NPE_CHECK_RETURN_VOID(env, paint);
172        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
173    }
174
175    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
176        NPE_CHECK_RETURN_VOID(env, paint);
177        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
178    }
179
180    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
181        NPE_CHECK_RETURN_VOID(env, paint);
182        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
183                filterBitmap ? Paint::kLow_FilterLevel : Paint::kNone_FilterLevel);
184    }
185
186    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
187        NPE_CHECK_RETURN_VOID(env, paint);
188        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
189    }
190
191    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
192        Paint* obj = reinterpret_cast<Paint*>(objHandle);
193        return static_cast<jint>(obj->getStyle());
194    }
195
196    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
197        Paint* obj = reinterpret_cast<Paint*>(objHandle);
198        Paint::Style style = static_cast<Paint::Style>(styleHandle);
199        obj->setStyle(style);
200    }
201
202    static jint getColor(JNIEnv* env, jobject paint) {
203        NPE_CHECK_RETURN_ZERO(env, paint);
204        int color;
205        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
206        return static_cast<jint>(color);
207    }
208
209    static jint getAlpha(JNIEnv* env, jobject paint) {
210        NPE_CHECK_RETURN_ZERO(env, paint);
211        int alpha;
212        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
213        return static_cast<jint>(alpha);
214    }
215
216    static void setColor(JNIEnv* env, jobject paint, jint color) {
217        NPE_CHECK_RETURN_VOID(env, paint);
218        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
219    }
220
221    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
222        NPE_CHECK_RETURN_VOID(env, paint);
223        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
224    }
225
226    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
227        NPE_CHECK_RETURN_ZERO(env, paint);
228        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
229    }
230
231    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
232        NPE_CHECK_RETURN_VOID(env, paint);
233        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
234    }
235
236    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
237        NPE_CHECK_RETURN_ZERO(env, paint);
238        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
239    }
240
241    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
242        NPE_CHECK_RETURN_VOID(env, paint);
243        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
244    }
245
246    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
247        Paint* obj = reinterpret_cast<Paint*>(objHandle);
248        return static_cast<jint>(obj->getStrokeCap());
249    }
250
251    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
252        Paint* obj = reinterpret_cast<Paint*>(objHandle);
253        Paint::Cap cap = static_cast<Paint::Cap>(capHandle);
254        obj->setStrokeCap(cap);
255    }
256
257    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
258        Paint* obj = reinterpret_cast<Paint*>(objHandle);
259        return static_cast<jint>(obj->getStrokeJoin());
260    }
261
262    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
263        Paint* obj = reinterpret_cast<Paint*>(objHandle);
264        Paint::Join join = (Paint::Join) joinHandle;
265        obj->setStrokeJoin(join);
266    }
267
268    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
269        Paint* obj = reinterpret_cast<Paint*>(objHandle);
270        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
271        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
272        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
273    }
274
275    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
276        Paint* obj = reinterpret_cast<Paint*>(objHandle);
277        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
278        return reinterpret_cast<jlong>(obj->setShader(shader));
279    }
280
281    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
282        Paint* obj = reinterpret_cast<Paint *>(objHandle);
283        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
284        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
285    }
286
287    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
288        Paint* obj = reinterpret_cast<Paint*>(objHandle);
289        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
290        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
291    }
292
293    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
294        Paint* obj = reinterpret_cast<Paint*>(objHandle);
295        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
296        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
297    }
298
299    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
300        Paint* obj = reinterpret_cast<Paint*>(objHandle);
301        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
302        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
303    }
304
305    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
306        // TODO: in Paint refactoring, set typeface on android Paint, not Paint
307        return NULL;
308    }
309
310    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
311        Paint* obj = reinterpret_cast<Paint*>(objHandle);
312        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
313        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
314    }
315
316    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
317        Paint* obj = reinterpret_cast<Paint*>(objHandle);
318        return static_cast<jint>(obj->getTextAlign());
319    }
320
321    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
322        Paint* obj = reinterpret_cast<Paint*>(objHandle);
323        Paint::Align align = static_cast<Paint::Align>(alignHandle);
324        obj->setTextAlign(align);
325    }
326
327    // generate bcp47 identifier for the supplied locale
328    static void toLanguageTag(char* output, size_t outSize,
329            const char* locale) {
330        if (output == NULL || outSize <= 0) {
331            return;
332        }
333        if (locale == NULL) {
334            output[0] = '\0';
335            return;
336        }
337        char canonicalChars[ULOC_FULLNAME_CAPACITY];
338        UErrorCode uErr = U_ZERO_ERROR;
339        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
340                &uErr);
341        if (U_SUCCESS(uErr)) {
342            char likelyChars[ULOC_FULLNAME_CAPACITY];
343            uErr = U_ZERO_ERROR;
344            uloc_addLikelySubtags(canonicalChars, likelyChars,
345                    ULOC_FULLNAME_CAPACITY, &uErr);
346            if (U_SUCCESS(uErr)) {
347                uErr = U_ZERO_ERROR;
348                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
349                if (U_SUCCESS(uErr)) {
350                    return;
351                } else {
352                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
353                            u_errorName(uErr));
354                }
355            } else {
356                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
357                        canonicalChars, u_errorName(uErr));
358            }
359        } else {
360            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
361                    u_errorName(uErr));
362        }
363        // unable to build a proper language identifier
364        output[0] = '\0';
365    }
366
367    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
368        Paint* obj = reinterpret_cast<Paint*>(objHandle);
369        ScopedUtfChars localeChars(env, locale);
370        char langTag[ULOC_FULLNAME_CAPACITY];
371        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
372
373        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
374        paintOpts.setLanguage(langTag);
375        obj->setPaintOptionsAndroid(paintOpts);
376    }
377
378    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
379        NPE_CHECK_RETURN_ZERO(env, paint);
380        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
381        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
382        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
383    }
384
385    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
386        NPE_CHECK_RETURN_VOID(env, paint);
387        Paint* obj = GraphicsJNI::getNativePaint(env, paint);
388        SkPaintOptionsAndroid::FontVariant variant =
389            aa ? SkPaintOptionsAndroid::kElegant_Variant :
390            SkPaintOptionsAndroid::kDefault_Variant;
391        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
392        paintOpts.setFontVariant(variant);
393        obj->setPaintOptionsAndroid(paintOpts);
394    }
395
396    static jfloat getTextSize(JNIEnv* env, jobject paint) {
397        NPE_CHECK_RETURN_ZERO(env, paint);
398        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
399    }
400
401    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
402        NPE_CHECK_RETURN_VOID(env, paint);
403        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
404    }
405
406    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
407        NPE_CHECK_RETURN_ZERO(env, paint);
408        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
409    }
410
411    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
412        NPE_CHECK_RETURN_VOID(env, paint);
413        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
414    }
415
416    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
417        NPE_CHECK_RETURN_ZERO(env, paint);
418        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
419    }
420
421    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
422        NPE_CHECK_RETURN_VOID(env, paint);
423        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
424    }
425
426    static jfloat getLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle) {
427        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
428        return paint->getLetterSpacing();
429    }
430
431    static void setLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat letterSpacing) {
432        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
433        paint->setLetterSpacing(letterSpacing);
434    }
435
436    static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, Paint::FontMetrics *metrics) {
437        const int kElegantTop = 2500;
438        const int kElegantBottom = -1000;
439        const int kElegantAscent = 1900;
440        const int kElegantDescent = -500;
441        const int kElegantLeading = 0;
442        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
443        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
444        typeface = TypefaceImpl_resolveDefault(typeface);
445        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
446        float saveSkewX = paint->getTextSkewX();
447        bool savefakeBold = paint->isFakeBoldText();
448        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
449        SkScalar spacing = paint->getFontMetrics(metrics);
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        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
456        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
457            SkScalar size = paint->getTextSize();
458            metrics->fTop = -size * kElegantTop / 2048;
459            metrics->fBottom = -size * kElegantBottom / 2048;
460            metrics->fAscent = -size * kElegantAscent / 2048;
461            metrics->fDescent = -size * kElegantDescent / 2048;
462            metrics->fLeading = size * kElegantLeading / 2048;
463            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
464        }
465        return spacing;
466    }
467
468    static jfloat ascent(JNIEnv* env, jobject paint) {
469        NPE_CHECK_RETURN_ZERO(env, paint);
470        Paint::FontMetrics metrics;
471        getMetricsInternal(env, paint, &metrics);
472        return SkScalarToFloat(metrics.fAscent);
473    }
474
475    static jfloat descent(JNIEnv* env, jobject paint) {
476        NPE_CHECK_RETURN_ZERO(env, paint);
477        Paint::FontMetrics metrics;
478        getMetricsInternal(env, paint, &metrics);
479        return SkScalarToFloat(metrics.fDescent);
480    }
481
482    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
483        NPE_CHECK_RETURN_ZERO(env, paint);
484        Paint::FontMetrics metrics;
485        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
486
487        if (metricsObj) {
488            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
489            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
490            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
491            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
492            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
493            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
494        }
495        return SkScalarToFloat(spacing);
496    }
497
498    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
499        NPE_CHECK_RETURN_ZERO(env, paint);
500        Paint::FontMetrics metrics;
501
502        getMetricsInternal(env, paint, &metrics);
503        int ascent = SkScalarRoundToInt(metrics.fAscent);
504        int descent = SkScalarRoundToInt(metrics.fDescent);
505        int leading = SkScalarRoundToInt(metrics.fLeading);
506
507        if (metricsObj) {
508            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
509            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
510            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
511            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
512            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
513            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
514        }
515        return descent - ascent + leading;
516    }
517
518    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
519            jint bidiFlags) {
520        NPE_CHECK_RETURN_ZERO(env, jpaint);
521        NPE_CHECK_RETURN_ZERO(env, text);
522
523        size_t textLength = env->GetArrayLength(text);
524        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
525            doThrowAIOOBE(env);
526            return 0;
527        }
528        if (count == 0) {
529            return 0;
530        }
531
532        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
533        const jchar* textArray = env->GetCharArrayElements(text, NULL);
534        jfloat result = 0;
535
536        Layout layout;
537        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
538        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, index, count, textLength);
539        result = layout.getAdvance();
540        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
541        return result;
542    }
543
544    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
545            jint bidiFlags) {
546        NPE_CHECK_RETURN_ZERO(env, jpaint);
547        NPE_CHECK_RETURN_ZERO(env, text);
548
549        size_t textLength = env->GetStringLength(text);
550        int count = end - start;
551        if ((start | count) < 0 || (size_t)end > textLength) {
552            doThrowAIOOBE(env);
553            return 0;
554        }
555        if (count == 0) {
556            return 0;
557        }
558
559        const jchar* textArray = env->GetStringChars(text, NULL);
560        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
561        jfloat width = 0;
562
563        Layout layout;
564        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
565        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, start, count, textLength);
566        width = layout.getAdvance();
567
568        env->ReleaseStringChars(text, textArray);
569        return width;
570    }
571
572    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
573        NPE_CHECK_RETURN_ZERO(env, jpaint);
574        NPE_CHECK_RETURN_ZERO(env, text);
575
576        size_t textLength = env->GetStringLength(text);
577        if (textLength == 0) {
578            return 0;
579        }
580
581        const jchar* textArray = env->GetStringChars(text, NULL);
582        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
583        jfloat width = 0;
584
585        Layout layout;
586        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
587        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, 0, textLength, textLength);
588        width = layout.getAdvance();
589
590        env->ReleaseStringChars(text, textArray);
591        return width;
592    }
593
594    static int dotextwidths(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar text[], int count,
595            jfloatArray widths, jint bidiFlags) {
596        NPE_CHECK_RETURN_ZERO(env, paint);
597        NPE_CHECK_RETURN_ZERO(env, text);
598
599        if (count < 0 || !widths) {
600            doThrowAIOOBE(env);
601            return 0;
602        }
603        if (count == 0) {
604            return 0;
605        }
606        size_t widthsLength = env->GetArrayLength(widths);
607        if ((size_t)count > widthsLength) {
608            doThrowAIOOBE(env);
609            return 0;
610        }
611
612        AutoJavaFloatArray autoWidths(env, widths, count);
613        jfloat* widthsArray = autoWidths.ptr();
614
615        Layout layout;
616        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
617        layout.getAdvances(widthsArray);
618
619        return count;
620    }
621
622    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
623            jint index, jint count, jint bidiFlags, jfloatArray widths) {
624        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
625        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
626        const jchar* textArray = env->GetCharArrayElements(text, NULL);
627        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
628        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
629                                      JNI_ABORT);
630        return count;
631    }
632
633    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
634            jint start, jint end, jint bidiFlags, jfloatArray widths) {
635        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
636        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
637        const jchar* textArray = env->GetStringChars(text, NULL);
638        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
639        env->ReleaseStringChars(text, textArray);
640        return count;
641    }
642
643    static jfloat doTextRunAdvances(JNIEnv *env, Paint *paint, TypefaceImpl* typeface, const jchar *text,
644                                    jint start, jint count, jint contextCount, jboolean isRtl,
645                                    jfloatArray advances, jint advancesIndex) {
646        NPE_CHECK_RETURN_ZERO(env, paint);
647        NPE_CHECK_RETURN_ZERO(env, text);
648
649        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
650            doThrowAIOOBE(env);
651            return 0;
652        }
653        if (count == 0) {
654            return 0;
655        }
656        if (advances) {
657            size_t advancesLength = env->GetArrayLength(advances);
658            if ((size_t)count > advancesLength) {
659                doThrowAIOOBE(env);
660                return 0;
661            }
662        }
663        jfloat* advancesArray = new jfloat[count];
664        jfloat totalAdvance = 0;
665
666        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
667
668        Layout layout;
669        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, start, count, contextCount);
670        layout.getAdvances(advancesArray);
671        totalAdvance = layout.getAdvance();
672
673        if (advances != NULL) {
674            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
675        }
676        delete [] advancesArray;
677        return totalAdvance;
678    }
679
680    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
681            jlong typefaceHandle,
682            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
683            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
684        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
685        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
686        jchar* textArray = env->GetCharArrayElements(text, NULL);
687        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
688                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
689        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
690        return result;
691    }
692
693    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
694            jlong typefaceHandle,
695            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
696            jfloatArray advances, jint advancesIndex) {
697        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
698        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
699        const jchar* textArray = env->GetStringChars(text, NULL);
700        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
701                start - contextStart, end - start, contextEnd - contextStart, isRtl,
702                advances, advancesIndex);
703        env->ReleaseStringChars(text, textArray);
704        return result;
705    }
706
707    static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start,
708            jint count, jint flags, jint offset, jint opt) {
709        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
710        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
711        return static_cast<jint>(result);
712    }
713
714    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
715            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
716        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
717        jchar* textArray = env->GetCharArrayElements(text, NULL);
718        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
719                offset, cursorOpt);
720        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
721        return result;
722    }
723
724    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
725            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
726        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
727        const jchar* textArray = env->GetStringChars(text, NULL);
728        jint result = doTextRunCursor(env, paint, textArray, contextStart,
729                contextEnd - contextStart, dir, offset, cursorOpt);
730        env->ReleaseStringChars(text, textArray);
731        return result;
732    }
733
734    class GetTextFunctor {
735    public:
736        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint,
737                    uint16_t* glyphs, SkPoint* pos)
738                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
739        }
740
741        void operator()(size_t start, size_t end) {
742            for (size_t i = start; i < end; i++) {
743                glyphs[i] = layout.getGlyphId(i);
744                pos[i].fX = x + layout.getX(i);
745                pos[i].fY = y + layout.getY(i);
746            }
747            if (start == 0) {
748                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
749            } else {
750                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
751                path->addPath(tmpPath);
752            }
753        }
754    private:
755        const Layout& layout;
756        SkPath* path;
757        jfloat x;
758        jfloat y;
759        Paint* paint;
760        uint16_t* glyphs;
761        SkPoint* pos;
762        SkPath tmpPath;
763    };
764
765    static void getTextPath(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar* text,
766            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
767        Layout layout;
768        MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count);
769        size_t nGlyphs = layout.nGlyphs();
770        uint16_t* glyphs = new uint16_t[nGlyphs];
771        SkPoint* pos = new SkPoint[nGlyphs];
772
773        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
774        Paint::Align align = paint->getTextAlign();
775        paint->setTextAlign(Paint::kLeft_Align);
776        paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
777        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
778        MinikinUtils::forFontRun(layout, paint, f);
779        paint->setTextAlign(align);
780        delete[] glyphs;
781        delete[] pos;
782    }
783
784    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
785            jlong typefaceHandle, jint bidiFlags,
786            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
787        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
788        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
789        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
790        const jchar* textArray = env->GetCharArrayElements(text, NULL);
791        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
792        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
793    }
794
795    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
796            jlong typefaceHandle, jint bidiFlags,
797            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
798        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
799        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
800        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
801        const jchar* textArray = env->GetStringChars(text, NULL);
802        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
803        env->ReleaseStringChars(text, textArray);
804    }
805
806    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
807                               jfloat dx, jfloat dy, jint color) {
808        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
809        if (radius <= 0) {
810            paint->setLooper(NULL);
811        }
812        else {
813            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
814            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
815        }
816    }
817
818    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
819        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
820        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
821    }
822
823    static int breakText(JNIEnv* env, const Paint& paint, TypefaceImpl* typeface, const jchar text[],
824                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
825                         Paint::TextBufferDirection textBufferDirection) {
826        size_t measuredCount = 0;
827        float measured = 0;
828
829        Layout layout;
830        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
831        float* advances = new float[count];
832        layout.getAdvances(advances);
833        const bool forwardScan = (textBufferDirection == Paint::kForward_TextBufferDirection);
834        for (int i = 0; i < count; i++) {
835            // traverse in the given direction
836            int index = forwardScan ? i : (count - i - 1);
837            float width = advances[index];
838            if (measured + width > maxWidth) {
839                break;
840            }
841            // properly handle clusters when scanning backwards
842            if (forwardScan || width != 0.0f) {
843                measuredCount = i + 1;
844            }
845            measured += width;
846        }
847        delete[] advances;
848
849        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
850            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
851            jfloat* array = autoMeasured.ptr();
852            array[0] = measured;
853        }
854        return measuredCount;
855    }
856
857    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
858            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
859        NPE_CHECK_RETURN_ZERO(env, jtext);
860
861        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
862        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
863
864        Paint::TextBufferDirection tbd;
865        if (count < 0) {
866            tbd = Paint::kBackward_TextBufferDirection;
867            count = -count;
868        }
869        else {
870            tbd = Paint::kForward_TextBufferDirection;
871        }
872
873        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
874            doThrowAIOOBE(env);
875            return 0;
876        }
877
878        const jchar* text = env->GetCharArrayElements(jtext, NULL);
879        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
880                          bidiFlags, jmeasuredWidth, tbd);
881        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
882                                      JNI_ABORT);
883        return count;
884    }
885
886    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
887                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
888        NPE_CHECK_RETURN_ZERO(env, jtext);
889
890        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
891        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
892
893        Paint::TextBufferDirection tbd = forwards ?
894                                        Paint::kForward_TextBufferDirection :
895                                        Paint::kBackward_TextBufferDirection;
896
897        int count = env->GetStringLength(jtext);
898        const jchar* text = env->GetStringChars(jtext, NULL);
899        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
900        env->ReleaseStringChars(jtext, text);
901        return count;
902    }
903
904    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
905            const Paint& paint, TypefaceImpl* typeface, jint bidiFlags) {
906        SkRect  r;
907        SkIRect ir;
908
909        Layout layout;
910        MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count);
911        MinikinRect rect;
912        layout.getBounds(&rect);
913        r.fLeft = rect.mLeft;
914        r.fTop = rect.mTop;
915        r.fRight = rect.mRight;
916        r.fBottom = rect.mBottom;
917        r.roundOut(&ir);
918        GraphicsJNI::irect_to_jrect(ir, env, bounds);
919    }
920
921    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
922                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
923        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);;
924        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
925        const jchar* textArray = env->GetStringChars(text, NULL);
926        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
927        env->ReleaseStringChars(text, textArray);
928    }
929
930    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
931                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
932        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
933        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
934        const jchar* textArray = env->GetCharArrayElements(text, NULL);
935        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
936        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
937                                      JNI_ABORT);
938    }
939
940};
941
942static JNINativeMethod methods[] = {
943    {"finalizer", "(J)V", (void*) PaintGlue::finalizer},
944    {"native_init","()J", (void*) PaintGlue::init},
945    {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint},
946    {"native_reset","(J)V", (void*) PaintGlue::reset},
947    {"native_set","(JJ)V", (void*) PaintGlue::assign},
948    {"getFlags","()I", (void*) PaintGlue::getFlags},
949    {"setFlags","(I)V", (void*) PaintGlue::setFlags},
950    {"getHinting","()I", (void*) PaintGlue::getHinting},
951    {"setHinting","(I)V", (void*) PaintGlue::setHinting},
952    {"setAntiAlias","(Z)V", (void*) PaintGlue::setAntiAlias},
953    {"setSubpixelText","(Z)V", (void*) PaintGlue::setSubpixelText},
954    {"setLinearText","(Z)V", (void*) PaintGlue::setLinearText},
955    {"setUnderlineText","(Z)V", (void*) PaintGlue::setUnderlineText},
956    {"setStrikeThruText","(Z)V", (void*) PaintGlue::setStrikeThruText},
957    {"setFakeBoldText","(Z)V", (void*) PaintGlue::setFakeBoldText},
958    {"setFilterBitmap","(Z)V", (void*) PaintGlue::setFilterBitmap},
959    {"setDither","(Z)V", (void*) PaintGlue::setDither},
960    {"native_getStyle","(J)I", (void*) PaintGlue::getStyle},
961    {"native_setStyle","(JI)V", (void*) PaintGlue::setStyle},
962    {"getColor","()I", (void*) PaintGlue::getColor},
963    {"setColor","(I)V", (void*) PaintGlue::setColor},
964    {"getAlpha","()I", (void*) PaintGlue::getAlpha},
965    {"setAlpha","(I)V", (void*) PaintGlue::setAlpha},
966    {"getStrokeWidth","()F", (void*) PaintGlue::getStrokeWidth},
967    {"setStrokeWidth","(F)V", (void*) PaintGlue::setStrokeWidth},
968    {"getStrokeMiter","()F", (void*) PaintGlue::getStrokeMiter},
969    {"setStrokeMiter","(F)V", (void*) PaintGlue::setStrokeMiter},
970    {"native_getStrokeCap","(J)I", (void*) PaintGlue::getStrokeCap},
971    {"native_setStrokeCap","(JI)V", (void*) PaintGlue::setStrokeCap},
972    {"native_getStrokeJoin","(J)I", (void*) PaintGlue::getStrokeJoin},
973    {"native_setStrokeJoin","(JI)V", (void*) PaintGlue::setStrokeJoin},
974    {"native_getFillPath","(JJJ)Z", (void*) PaintGlue::getFillPath},
975    {"native_setShader","(JJ)J", (void*) PaintGlue::setShader},
976    {"native_setColorFilter","(JJ)J", (void*) PaintGlue::setColorFilter},
977    {"native_setXfermode","(JJ)J", (void*) PaintGlue::setXfermode},
978    {"native_setPathEffect","(JJ)J", (void*) PaintGlue::setPathEffect},
979    {"native_setMaskFilter","(JJ)J", (void*) PaintGlue::setMaskFilter},
980    {"native_setTypeface","(JJ)J", (void*) PaintGlue::setTypeface},
981    {"native_setRasterizer","(JJ)J", (void*) PaintGlue::setRasterizer},
982    {"native_getTextAlign","(J)I", (void*) PaintGlue::getTextAlign},
983    {"native_setTextAlign","(JI)V", (void*) PaintGlue::setTextAlign},
984    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) PaintGlue::setTextLocale},
985    {"isElegantTextHeight","()Z", (void*) PaintGlue::isElegantTextHeight},
986    {"setElegantTextHeight","(Z)V", (void*) PaintGlue::setElegantTextHeight},
987    {"getTextSize","()F", (void*) PaintGlue::getTextSize},
988    {"setTextSize","(F)V", (void*) PaintGlue::setTextSize},
989    {"getTextScaleX","()F", (void*) PaintGlue::getTextScaleX},
990    {"setTextScaleX","(F)V", (void*) PaintGlue::setTextScaleX},
991    {"getTextSkewX","()F", (void*) PaintGlue::getTextSkewX},
992    {"setTextSkewX","(F)V", (void*) PaintGlue::setTextSkewX},
993    {"native_getLetterSpacing","(J)F", (void*) PaintGlue::getLetterSpacing},
994    {"native_setLetterSpacing","(JF)V", (void*) PaintGlue::setLetterSpacing},
995    {"ascent","()F", (void*) PaintGlue::ascent},
996    {"descent","()F", (void*) PaintGlue::descent},
997    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)PaintGlue::getFontMetrics},
998    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)PaintGlue::getFontMetricsInt},
999    {"native_measureText","([CIII)F", (void*) PaintGlue::measureText_CIII},
1000    {"native_measureText","(Ljava/lang/String;I)F", (void*) PaintGlue::measureText_StringI},
1001    {"native_measureText","(Ljava/lang/String;III)F", (void*) PaintGlue::measureText_StringIII},
1002    {"native_breakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC},
1003    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS},
1004    {"native_getTextWidths","(JJ[CIII[F)I", (void*) PaintGlue::getTextWidths___CIII_F},
1005    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) PaintGlue::getTextWidths__StringIII_F},
1006    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1007        (void*) PaintGlue::getTextRunAdvances___CIIIIZ_FI},
1008    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1009        (void*) PaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1010
1011    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C},
1012    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1013        (void*) PaintGlue::getTextRunCursor__String},
1014    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C},
1015    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String},
1016    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1017                                        (void*) PaintGlue::getStringBounds },
1018    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1019                                    (void*) PaintGlue::getCharArrayBounds },
1020    {"native_setShadowLayer", "(JFFFI)V", (void*)PaintGlue::setShadowLayer},
1021    {"native_hasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer}
1022};
1023
1024static jfieldID req_fieldID(jfieldID id) {
1025    SkASSERT(id);
1026    return id;
1027}
1028
1029int register_android_graphics_Paint(JNIEnv* env) {
1030    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1031    SkASSERT(gFontMetrics_class);
1032    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1033
1034    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1035    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1036    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1037    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1038    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1039
1040    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1041    SkASSERT(gFontMetricsInt_class);
1042    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1043
1044    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1045    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1046    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1047    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1048    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1049
1050    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1051        sizeof(methods) / sizeof(methods[0]));
1052    return result;
1053}
1054
1055}
1056