Paint.cpp revision 6ba30b85ddfbe37c338ee8dde3dd33322eb38d47 
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 SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, Paint::FontMetrics *metrics) {
427        const int kElegantTop = 2500;
428        const int kElegantBottom = -1000;
429        const int kElegantAscent = 1900;
430        const int kElegantDescent = -500;
431        const int kElegantLeading = 0;
432        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
433        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
434        typeface = TypefaceImpl_resolveDefault(typeface);
435        FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
436        float saveSkewX = paint->getTextSkewX();
437        bool savefakeBold = paint->isFakeBoldText();
438        MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery);
439        SkScalar spacing = paint->getFontMetrics(metrics);
440        // The populateSkPaint call may have changed fake bold / text skew
441        // because we want to measure with those effects applied, so now
442        // restore the original settings.
443        paint->setTextSkewX(saveSkewX);
444        paint->setFakeBoldText(savefakeBold);
445        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
446        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
447            SkScalar size = paint->getTextSize();
448            metrics->fTop = -size * kElegantTop / 2048;
449            metrics->fBottom = -size * kElegantBottom / 2048;
450            metrics->fAscent = -size * kElegantAscent / 2048;
451            metrics->fDescent = -size * kElegantDescent / 2048;
452            metrics->fLeading = size * kElegantLeading / 2048;
453            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
454        }
455        return spacing;
456    }
457
458    static jfloat ascent(JNIEnv* env, jobject paint) {
459        NPE_CHECK_RETURN_ZERO(env, paint);
460        Paint::FontMetrics metrics;
461        getMetricsInternal(env, paint, &metrics);
462        return SkScalarToFloat(metrics.fAscent);
463    }
464
465    static jfloat descent(JNIEnv* env, jobject paint) {
466        NPE_CHECK_RETURN_ZERO(env, paint);
467        Paint::FontMetrics metrics;
468        getMetricsInternal(env, paint, &metrics);
469        return SkScalarToFloat(metrics.fDescent);
470    }
471
472    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
473        NPE_CHECK_RETURN_ZERO(env, paint);
474        Paint::FontMetrics metrics;
475        SkScalar spacing = getMetricsInternal(env, paint, &metrics);
476
477        if (metricsObj) {
478            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
479            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
480            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
481            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
482            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
483            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
484        }
485        return SkScalarToFloat(spacing);
486    }
487
488    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
489        NPE_CHECK_RETURN_ZERO(env, paint);
490        Paint::FontMetrics metrics;
491
492        getMetricsInternal(env, paint, &metrics);
493        int ascent = SkScalarRoundToInt(metrics.fAscent);
494        int descent = SkScalarRoundToInt(metrics.fDescent);
495        int leading = SkScalarRoundToInt(metrics.fLeading);
496
497        if (metricsObj) {
498            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
499            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
500            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
501            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
502            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
503            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
504        }
505        return descent - ascent + leading;
506    }
507
508    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
509            jint bidiFlags) {
510        NPE_CHECK_RETURN_ZERO(env, jpaint);
511        NPE_CHECK_RETURN_ZERO(env, text);
512
513        size_t textLength = env->GetArrayLength(text);
514        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
515            doThrowAIOOBE(env);
516            return 0;
517        }
518        if (count == 0) {
519            return 0;
520        }
521
522        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
523        const jchar* textArray = env->GetCharArrayElements(text, NULL);
524        jfloat result = 0;
525
526        Layout layout;
527        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
528        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
529        layout.doLayout(textArray, index, count, textLength, css);
530        result = layout.getAdvance();
531        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
532        return result;
533    }
534
535    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
536            jint bidiFlags) {
537        NPE_CHECK_RETURN_ZERO(env, jpaint);
538        NPE_CHECK_RETURN_ZERO(env, text);
539
540        size_t textLength = env->GetStringLength(text);
541        int count = end - start;
542        if ((start | count) < 0 || (size_t)end > textLength) {
543            doThrowAIOOBE(env);
544            return 0;
545        }
546        if (count == 0) {
547            return 0;
548        }
549
550        const jchar* textArray = env->GetStringChars(text, NULL);
551        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
552        jfloat width = 0;
553
554        Layout layout;
555        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
556        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
557        layout.doLayout(textArray, start, count, textLength, css);
558        width = layout.getAdvance();
559
560        env->ReleaseStringChars(text, textArray);
561        return width;
562    }
563
564    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
565        NPE_CHECK_RETURN_ZERO(env, jpaint);
566        NPE_CHECK_RETURN_ZERO(env, text);
567
568        size_t textLength = env->GetStringLength(text);
569        if (textLength == 0) {
570            return 0;
571        }
572
573        const jchar* textArray = env->GetStringChars(text, NULL);
574        Paint* paint = GraphicsJNI::getNativePaint(env, jpaint);
575        jfloat width = 0;
576
577        Layout layout;
578        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
579        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
580        layout.doLayout(textArray, 0, textLength, textLength, css);
581        width = layout.getAdvance();
582
583        env->ReleaseStringChars(text, textArray);
584        return width;
585    }
586
587    static int dotextwidths(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar text[], int count,
588            jfloatArray widths, jint bidiFlags) {
589        NPE_CHECK_RETURN_ZERO(env, paint);
590        NPE_CHECK_RETURN_ZERO(env, text);
591
592        if (count < 0 || !widths) {
593            doThrowAIOOBE(env);
594            return 0;
595        }
596        if (count == 0) {
597            return 0;
598        }
599        size_t widthsLength = env->GetArrayLength(widths);
600        if ((size_t)count > widthsLength) {
601            doThrowAIOOBE(env);
602            return 0;
603        }
604
605        AutoJavaFloatArray autoWidths(env, widths, count);
606        jfloat* widthsArray = autoWidths.ptr();
607
608        Layout layout;
609        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
610        layout.doLayout(text, 0, count, count, css);
611        layout.getAdvances(widthsArray);
612
613        return count;
614    }
615
616    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
617            jint index, jint count, jint bidiFlags, jfloatArray widths) {
618        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
619        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
620        const jchar* textArray = env->GetCharArrayElements(text, NULL);
621        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
622        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
623                                      JNI_ABORT);
624        return count;
625    }
626
627    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
628            jint start, jint end, jint bidiFlags, jfloatArray widths) {
629        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
630        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
631        const jchar* textArray = env->GetStringChars(text, NULL);
632        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
633        env->ReleaseStringChars(text, textArray);
634        return count;
635    }
636
637    static jfloat doTextRunAdvances(JNIEnv *env, Paint *paint, TypefaceImpl* typeface, const jchar *text,
638                                    jint start, jint count, jint contextCount, jboolean isRtl,
639                                    jfloatArray advances, jint advancesIndex) {
640        NPE_CHECK_RETURN_ZERO(env, paint);
641        NPE_CHECK_RETURN_ZERO(env, text);
642
643        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
644            doThrowAIOOBE(env);
645            return 0;
646        }
647        if (count == 0) {
648            return 0;
649        }
650        if (advances) {
651            size_t advancesLength = env->GetArrayLength(advances);
652            if ((size_t)count > advancesLength) {
653                doThrowAIOOBE(env);
654                return 0;
655            }
656        }
657        jfloat* advancesArray = new jfloat[count];
658        jfloat totalAdvance = 0;
659
660        int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR;
661
662        Layout layout;
663        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
664        layout.doLayout(text, start, count, contextCount, css);
665        layout.getAdvances(advancesArray);
666        totalAdvance = layout.getAdvance();
667
668        if (advances != NULL) {
669            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
670        }
671        delete [] advancesArray;
672        return totalAdvance;
673    }
674
675    static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
676            jlong typefaceHandle,
677            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
678            jboolean isRtl, jfloatArray advances, jint advancesIndex) {
679        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
680        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
681        jchar* textArray = env->GetCharArrayElements(text, NULL);
682        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
683                index - contextIndex, count, contextCount, isRtl, advances, advancesIndex);
684        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
685        return result;
686    }
687
688    static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
689            jlong typefaceHandle,
690            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl,
691            jfloatArray advances, jint advancesIndex) {
692        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
693        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
694        const jchar* textArray = env->GetStringChars(text, NULL);
695        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
696                start - contextStart, end - start, contextEnd - contextStart, isRtl,
697                advances, advancesIndex);
698        env->ReleaseStringChars(text, textArray);
699        return result;
700    }
701
702    static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start,
703            jint count, jint flags, jint offset, jint opt) {
704        GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt);
705        size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt);
706        return static_cast<jint>(result);
707    }
708
709    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
710            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
711        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
712        jchar* textArray = env->GetCharArrayElements(text, NULL);
713        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir,
714                offset, cursorOpt);
715        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
716        return result;
717    }
718
719    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
720            jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) {
721        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
722        const jchar* textArray = env->GetStringChars(text, NULL);
723        jint result = doTextRunCursor(env, paint, textArray, contextStart,
724                contextEnd - contextStart, dir, offset, cursorOpt);
725        env->ReleaseStringChars(text, textArray);
726        return result;
727    }
728
729    class GetTextFunctor {
730    public:
731        GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint,
732                    uint16_t* glyphs, SkPoint* pos)
733                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
734        }
735
736        void operator()(size_t start, size_t end) {
737            for (size_t i = start; i < end; i++) {
738                glyphs[i] = layout.getGlyphId(i);
739                pos[i].fX = x + layout.getX(i);
740                pos[i].fY = y + layout.getY(i);
741            }
742            if (start == 0) {
743                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path);
744            } else {
745                paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath);
746                path->addPath(tmpPath);
747            }
748        }
749    private:
750        const Layout& layout;
751        SkPath* path;
752        jfloat x;
753        jfloat y;
754        Paint* paint;
755        uint16_t* glyphs;
756        SkPoint* pos;
757        SkPath tmpPath;
758    };
759
760    static void getTextPath(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar* text,
761            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
762        Layout layout;
763        std::string css = MinikinUtils::setLayoutProperties(&layout, paint, bidiFlags, typeface);
764        layout.doLayout(text, 0, count, count, css);
765        size_t nGlyphs = layout.nGlyphs();
766        uint16_t* glyphs = new uint16_t[nGlyphs];
767        SkPoint* pos = new SkPoint[nGlyphs];
768
769        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
770        Paint::Align align = paint->getTextAlign();
771        paint->setTextAlign(Paint::kLeft_Align);
772        paint->setTextEncoding(Paint::kGlyphID_TextEncoding);
773        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
774        MinikinUtils::forFontRun(layout, paint, f);
775        paint->setTextAlign(align);
776        delete[] glyphs;
777        delete[] pos;
778    }
779
780    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle,
781            jlong typefaceHandle, jint bidiFlags,
782            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
783        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
784        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
785        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
786        const jchar* textArray = env->GetCharArrayElements(text, NULL);
787        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
788        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
789    }
790
791    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle,
792            jlong typefaceHandle, jint bidiFlags,
793            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
794        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
795        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
796        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
797        const jchar* textArray = env->GetStringChars(text, NULL);
798        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
799        env->ReleaseStringChars(text, textArray);
800    }
801
802    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
803                               jfloat dx, jfloat dy, jint color) {
804        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
805        if (radius <= 0) {
806            paint->setLooper(NULL);
807        }
808        else {
809            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
810            paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref();
811        }
812    }
813
814    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
815        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
816        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
817    }
818
819    static int breakText(JNIEnv* env, const Paint& paint, TypefaceImpl* typeface, const jchar text[],
820                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
821                         Paint::TextBufferDirection textBufferDirection) {
822        size_t measuredCount = 0;
823        float measured = 0;
824
825        Layout layout;
826        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
827        layout.doLayout(text, 0, count, count, css);
828        float* advances = new float[count];
829        layout.getAdvances(advances);
830        const bool forwardScan = (textBufferDirection == Paint::kForward_TextBufferDirection);
831        for (int i = 0; i < count; i++) {
832            // traverse in the given direction
833            int index = forwardScan ? i : (count - i - 1);
834            float width = advances[index];
835            if (measured + width > maxWidth) {
836                break;
837            }
838            // properly handle clusters when scanning backwards
839            if (forwardScan || width != 0.0f) {
840                measuredCount = i + 1;
841            }
842            measured += width;
843        }
844        delete[] advances;
845
846        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
847            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
848            jfloat* array = autoMeasured.ptr();
849            array[0] = measured;
850        }
851        return measuredCount;
852    }
853
854    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext,
855            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
856        NPE_CHECK_RETURN_ZERO(env, jtext);
857
858        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
859        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
860
861        Paint::TextBufferDirection tbd;
862        if (count < 0) {
863            tbd = Paint::kBackward_TextBufferDirection;
864            count = -count;
865        }
866        else {
867            tbd = Paint::kForward_TextBufferDirection;
868        }
869
870        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
871            doThrowAIOOBE(env);
872            return 0;
873        }
874
875        const jchar* text = env->GetCharArrayElements(jtext, NULL);
876        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
877                          bidiFlags, jmeasuredWidth, tbd);
878        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
879                                      JNI_ABORT);
880        return count;
881    }
882
883    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext,
884                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
885        NPE_CHECK_RETURN_ZERO(env, jtext);
886
887        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
888        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
889
890        Paint::TextBufferDirection tbd = forwards ?
891                                        Paint::kForward_TextBufferDirection :
892                                        Paint::kBackward_TextBufferDirection;
893
894        int count = env->GetStringLength(jtext);
895        const jchar* text = env->GetStringChars(jtext, NULL);
896        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
897        env->ReleaseStringChars(jtext, text);
898        return count;
899    }
900
901    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
902            const Paint& paint, TypefaceImpl* typeface, jint bidiFlags) {
903        SkRect  r;
904        SkIRect ir;
905
906        Layout layout;
907        std::string css = MinikinUtils::setLayoutProperties(&layout, &paint, bidiFlags, typeface);
908        layout.doLayout(text, 0, count, count, css);
909        MinikinRect rect;
910        layout.getBounds(&rect);
911        r.fLeft = rect.mLeft;
912        r.fTop = rect.mTop;
913        r.fRight = rect.mRight;
914        r.fBottom = rect.mBottom;
915        r.roundOut(&ir);
916        GraphicsJNI::irect_to_jrect(ir, env, bounds);
917    }
918
919    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
920                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
921        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);;
922        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
923        const jchar* textArray = env->GetStringChars(text, NULL);
924        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
925        env->ReleaseStringChars(text, textArray);
926    }
927
928    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle,
929                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
930        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
931        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
932        const jchar* textArray = env->GetCharArrayElements(text, NULL);
933        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
934        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
935                                      JNI_ABORT);
936    }
937
938};
939
940static JNINativeMethod methods[] = {
941    {"finalizer", "(J)V", (void*) PaintGlue::finalizer},
942    {"native_init","()J", (void*) PaintGlue::init},
943    {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint},
944    {"native_reset","(J)V", (void*) PaintGlue::reset},
945    {"native_set","(JJ)V", (void*) PaintGlue::assign},
946    {"getFlags","()I", (void*) PaintGlue::getFlags},
947    {"setFlags","(I)V", (void*) PaintGlue::setFlags},
948    {"getHinting","()I", (void*) PaintGlue::getHinting},
949    {"setHinting","(I)V", (void*) PaintGlue::setHinting},
950    {"setAntiAlias","(Z)V", (void*) PaintGlue::setAntiAlias},
951    {"setSubpixelText","(Z)V", (void*) PaintGlue::setSubpixelText},
952    {"setLinearText","(Z)V", (void*) PaintGlue::setLinearText},
953    {"setUnderlineText","(Z)V", (void*) PaintGlue::setUnderlineText},
954    {"setStrikeThruText","(Z)V", (void*) PaintGlue::setStrikeThruText},
955    {"setFakeBoldText","(Z)V", (void*) PaintGlue::setFakeBoldText},
956    {"setFilterBitmap","(Z)V", (void*) PaintGlue::setFilterBitmap},
957    {"setDither","(Z)V", (void*) PaintGlue::setDither},
958    {"native_getStyle","(J)I", (void*) PaintGlue::getStyle},
959    {"native_setStyle","(JI)V", (void*) PaintGlue::setStyle},
960    {"getColor","()I", (void*) PaintGlue::getColor},
961    {"setColor","(I)V", (void*) PaintGlue::setColor},
962    {"getAlpha","()I", (void*) PaintGlue::getAlpha},
963    {"setAlpha","(I)V", (void*) PaintGlue::setAlpha},
964    {"getStrokeWidth","()F", (void*) PaintGlue::getStrokeWidth},
965    {"setStrokeWidth","(F)V", (void*) PaintGlue::setStrokeWidth},
966    {"getStrokeMiter","()F", (void*) PaintGlue::getStrokeMiter},
967    {"setStrokeMiter","(F)V", (void*) PaintGlue::setStrokeMiter},
968    {"native_getStrokeCap","(J)I", (void*) PaintGlue::getStrokeCap},
969    {"native_setStrokeCap","(JI)V", (void*) PaintGlue::setStrokeCap},
970    {"native_getStrokeJoin","(J)I", (void*) PaintGlue::getStrokeJoin},
971    {"native_setStrokeJoin","(JI)V", (void*) PaintGlue::setStrokeJoin},
972    {"native_getFillPath","(JJJ)Z", (void*) PaintGlue::getFillPath},
973    {"native_setShader","(JJ)J", (void*) PaintGlue::setShader},
974    {"native_setColorFilter","(JJ)J", (void*) PaintGlue::setColorFilter},
975    {"native_setXfermode","(JJ)J", (void*) PaintGlue::setXfermode},
976    {"native_setPathEffect","(JJ)J", (void*) PaintGlue::setPathEffect},
977    {"native_setMaskFilter","(JJ)J", (void*) PaintGlue::setMaskFilter},
978    {"native_setTypeface","(JJ)J", (void*) PaintGlue::setTypeface},
979    {"native_setRasterizer","(JJ)J", (void*) PaintGlue::setRasterizer},
980    {"native_getTextAlign","(J)I", (void*) PaintGlue::getTextAlign},
981    {"native_setTextAlign","(JI)V", (void*) PaintGlue::setTextAlign},
982    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) PaintGlue::setTextLocale},
983    {"isElegantTextHeight","()Z", (void*) PaintGlue::isElegantTextHeight},
984    {"setElegantTextHeight","(Z)V", (void*) PaintGlue::setElegantTextHeight},
985    {"getTextSize","()F", (void*) PaintGlue::getTextSize},
986    {"setTextSize","(F)V", (void*) PaintGlue::setTextSize},
987    {"getTextScaleX","()F", (void*) PaintGlue::getTextScaleX},
988    {"setTextScaleX","(F)V", (void*) PaintGlue::setTextScaleX},
989    {"getTextSkewX","()F", (void*) PaintGlue::getTextSkewX},
990    {"setTextSkewX","(F)V", (void*) PaintGlue::setTextSkewX},
991    {"ascent","()F", (void*) PaintGlue::ascent},
992    {"descent","()F", (void*) PaintGlue::descent},
993    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)PaintGlue::getFontMetrics},
994    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)PaintGlue::getFontMetricsInt},
995    {"native_measureText","([CIII)F", (void*) PaintGlue::measureText_CIII},
996    {"native_measureText","(Ljava/lang/String;I)F", (void*) PaintGlue::measureText_StringI},
997    {"native_measureText","(Ljava/lang/String;III)F", (void*) PaintGlue::measureText_StringIII},
998    {"native_breakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC},
999    {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS},
1000    {"native_getTextWidths","(JJ[CIII[F)I", (void*) PaintGlue::getTextWidths___CIII_F},
1001    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) PaintGlue::getTextWidths__StringIII_F},
1002    {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F",
1003        (void*) PaintGlue::getTextRunAdvances___CIIIIZ_FI},
1004    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F",
1005        (void*) PaintGlue::getTextRunAdvances__StringIIIIZ_FI},
1006
1007    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C},
1008    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1009        (void*) PaintGlue::getTextRunCursor__String},
1010    {"native_getTextPath","(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C},
1011    {"native_getTextPath","(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String},
1012    {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V",
1013                                        (void*) PaintGlue::getStringBounds },
1014    {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V",
1015                                    (void*) PaintGlue::getCharArrayBounds },
1016    {"native_setShadowLayer", "(JFFFI)V", (void*)PaintGlue::setShadowLayer},
1017    {"native_hasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer}
1018};
1019
1020static jfieldID req_fieldID(jfieldID id) {
1021    SkASSERT(id);
1022    return id;
1023}
1024
1025int register_android_graphics_Paint(JNIEnv* env) {
1026    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1027    SkASSERT(gFontMetrics_class);
1028    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1029
1030    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1031    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1032    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1033    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1034    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1035
1036    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1037    SkASSERT(gFontMetricsInt_class);
1038    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1039
1040    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1041    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1042    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1043    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1044    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1045
1046    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1047        sizeof(methods) / sizeof(methods[0]));
1048    return result;
1049}
1050
1051}
1052