Paint.cpp revision 2836c4722a156ec78d7f4101b394885a354f5dd6 
1/* libs/android_runtime/android/graphics/Paint.cpp
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "Paint"
19
20#include <utils/Log.h>
21
22#include "jni.h"
23#include "GraphicsJNI.h"
24#include <android_runtime/AndroidRuntime.h>
25#include <ScopedUtfChars.h>
26
27#include "SkBlurDrawLooper.h"
28#include "SkColorFilter.h"
29#include "SkMaskFilter.h"
30#include "SkRasterizer.h"
31#include "SkShader.h"
32#include "SkTypeface.h"
33#include "SkXfermode.h"
34#include "unicode/uloc.h"
35#include "unicode/ushape.h"
36#include "utils/Blur.h"
37#include "TextLayout.h"
38
39#ifdef USE_MINIKIN
40#include <minikin/Layout.h>
41#include "MinikinSkia.h"
42#include "MinikinUtils.h"
43#endif
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(SkPaint* paint) {
66    // GlyphID encoding is required because we are using Harfbuzz shaping
67    paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
68
69    SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
70    paintOpts.setUseFontFallbacks(true);
71    paint->setPaintOptionsAndroid(paintOpts);
72}
73
74class SkPaintGlue {
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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
82        delete obj;
83    }
84
85    static jlong init(JNIEnv* env, jobject clazz) {
86        SkPaint* obj = new SkPaint();
87        defaultSettingsForAndroid(obj);
88        return reinterpret_cast<jlong>(obj);
89    }
90
91    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
92        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
93        SkPaint* obj = new SkPaint(*paint);
94        return reinterpret_cast<jlong>(obj);
95    }
96
97    static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
98        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
99        obj->reset();
100        defaultSettingsForAndroid(obj);
101    }
102
103    static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) {
104        SkPaint* dst = reinterpret_cast<SkPaint*>(dstPaintHandle);
105        const SkPaint* src = reinterpret_cast<SkPaint*>(srcPaintHandle);
106        *dst = *src;
107    }
108
109    static jint getFlags(JNIEnv* env, jobject paint) {
110        NPE_CHECK_RETURN_ZERO(env, paint);
111        int result;
112        result = GraphicsJNI::getNativePaint(env, paint)->getFlags();
113        return static_cast<jint>(result);
114    }
115
116    static void setFlags(JNIEnv* env, jobject paint, jint flags) {
117        NPE_CHECK_RETURN_VOID(env, paint);
118        GraphicsJNI::getNativePaint(env, paint)->setFlags(flags);
119    }
120
121    static jint getHinting(JNIEnv* env, jobject paint) {
122        NPE_CHECK_RETURN_ZERO(env, paint);
123        return GraphicsJNI::getNativePaint(env, paint)->getHinting()
124                == SkPaint::kNo_Hinting ? 0 : 1;
125    }
126
127    static void setHinting(JNIEnv* env, jobject paint, jint mode) {
128        NPE_CHECK_RETURN_VOID(env, paint);
129        GraphicsJNI::getNativePaint(env, paint)->setHinting(
130                mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting);
131    }
132
133    static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) {
134        NPE_CHECK_RETURN_VOID(env, paint);
135        GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa);
136    }
137
138    static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) {
139        NPE_CHECK_RETURN_VOID(env, paint);
140        GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText);
141    }
142
143    static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) {
144        NPE_CHECK_RETURN_VOID(env, paint);
145        GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText);
146    }
147
148    static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) {
149        NPE_CHECK_RETURN_VOID(env, paint);
150        GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText);
151    }
152
153    static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) {
154        NPE_CHECK_RETURN_VOID(env, paint);
155        GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText);
156    }
157
158    static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) {
159        NPE_CHECK_RETURN_VOID(env, paint);
160        GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText);
161    }
162
163    static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) {
164        NPE_CHECK_RETURN_VOID(env, paint);
165        GraphicsJNI::getNativePaint(env, paint)->setFilterLevel(
166                filterBitmap ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
167    }
168
169    static void setDither(JNIEnv* env, jobject paint, jboolean dither) {
170        NPE_CHECK_RETURN_VOID(env, paint);
171        GraphicsJNI::getNativePaint(env, paint)->setDither(dither);
172    }
173
174    static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) {
175        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
176        return static_cast<jint>(obj->getStyle());
177    }
178
179    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
180        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
181        SkPaint::Style style = static_cast<SkPaint::Style>(styleHandle);
182        obj->setStyle(style);
183    }
184
185    static jint getColor(JNIEnv* env, jobject paint) {
186        NPE_CHECK_RETURN_ZERO(env, paint);
187        int color;
188        color = GraphicsJNI::getNativePaint(env, paint)->getColor();
189        return static_cast<jint>(color);
190    }
191
192    static jint getAlpha(JNIEnv* env, jobject paint) {
193        NPE_CHECK_RETURN_ZERO(env, paint);
194        int alpha;
195        alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha();
196        return static_cast<jint>(alpha);
197    }
198
199    static void setColor(JNIEnv* env, jobject paint, jint color) {
200        NPE_CHECK_RETURN_VOID(env, paint);
201        GraphicsJNI::getNativePaint(env, paint)->setColor(color);
202    }
203
204    static void setAlpha(JNIEnv* env, jobject paint, jint a) {
205        NPE_CHECK_RETURN_VOID(env, paint);
206        GraphicsJNI::getNativePaint(env, paint)->setAlpha(a);
207    }
208
209    static jfloat getStrokeWidth(JNIEnv* env, jobject paint) {
210        NPE_CHECK_RETURN_ZERO(env, paint);
211        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth());
212    }
213
214    static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) {
215        NPE_CHECK_RETURN_VOID(env, paint);
216        GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(width);
217    }
218
219    static jfloat getStrokeMiter(JNIEnv* env, jobject paint) {
220        NPE_CHECK_RETURN_ZERO(env, paint);
221        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter());
222    }
223
224    static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) {
225        NPE_CHECK_RETURN_VOID(env, paint);
226        GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(miter);
227    }
228
229    static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) {
230        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
231        return static_cast<jint>(obj->getStrokeCap());
232    }
233
234    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
235        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
236        SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle);
237        obj->setStrokeCap(cap);
238    }
239
240    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
241        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
242        return static_cast<jint>(obj->getStrokeJoin());
243    }
244
245    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
246        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
247        SkPaint::Join join = (SkPaint::Join) joinHandle;
248        obj->setStrokeJoin(join);
249    }
250
251    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
252        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
253        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
254        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
255        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
256    }
257
258    static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) {
259        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
260        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
261        return reinterpret_cast<jlong>(obj->setShader(shader));
262    }
263
264    static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) {
265        SkPaint* obj = reinterpret_cast<SkPaint *>(objHandle);
266        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
267        return reinterpret_cast<jlong>(obj->setColorFilter(filter));
268    }
269
270    static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) {
271        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
272        SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle);
273        return reinterpret_cast<jlong>(obj->setXfermode(xfermode));
274    }
275
276    static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) {
277        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
278        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
279        return reinterpret_cast<jlong>(obj->setPathEffect(effect));
280    }
281
282    static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) {
283        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
284        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
285        return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter));
286    }
287
288    static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) {
289#ifndef USE_MINIKIN
290        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
291        SkTypeface* typeface = reinterpret_cast<SkTypeface*>(typefaceHandle);
292        return reinterpret_cast<jlong>(obj->setTypeface(typeface));
293#else
294        // TODO(raph): not yet implemented
295        return NULL;
296#endif
297    }
298
299    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
300        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
301        SkRasterizer* rasterizer = reinterpret_cast<SkRasterizer*>(rasterizerHandle);
302        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
303    }
304
305    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
306        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
307        return static_cast<jint>(obj->getTextAlign());
308    }
309
310    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
311        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
312        SkPaint::Align align = static_cast<SkPaint::Align>(alignHandle);
313        obj->setTextAlign(align);
314    }
315
316    // generate bcp47 identifier for the supplied locale
317    static void toLanguageTag(char* output, size_t outSize,
318            const char* locale) {
319        if (output == NULL || outSize <= 0) {
320            return;
321        }
322        if (locale == NULL) {
323            output[0] = '\0';
324            return;
325        }
326        char canonicalChars[ULOC_FULLNAME_CAPACITY];
327        UErrorCode uErr = U_ZERO_ERROR;
328        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
329                &uErr);
330        if (U_SUCCESS(uErr)) {
331            char likelyChars[ULOC_FULLNAME_CAPACITY];
332            uErr = U_ZERO_ERROR;
333            uloc_addLikelySubtags(canonicalChars, likelyChars,
334                    ULOC_FULLNAME_CAPACITY, &uErr);
335            if (U_SUCCESS(uErr)) {
336                uErr = U_ZERO_ERROR;
337                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
338                if (U_SUCCESS(uErr)) {
339                    return;
340                } else {
341                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
342                            u_errorName(uErr));
343                }
344            } else {
345                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
346                        canonicalChars, u_errorName(uErr));
347            }
348        } else {
349            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
350                    u_errorName(uErr));
351        }
352        // unable to build a proper language identifier
353        output[0] = '\0';
354    }
355
356    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
357        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
358        ScopedUtfChars localeChars(env, locale);
359        char langTag[ULOC_FULLNAME_CAPACITY];
360        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
361
362        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
363        paintOpts.setLanguage(langTag);
364        obj->setPaintOptionsAndroid(paintOpts);
365    }
366
367    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
368        NPE_CHECK_RETURN_ZERO(env, paint);
369        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
370        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
371        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
372    }
373
374    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
375        NPE_CHECK_RETURN_VOID(env, paint);
376        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
377        SkPaintOptionsAndroid::FontVariant variant =
378            aa ? SkPaintOptionsAndroid::kElegant_Variant :
379            SkPaintOptionsAndroid::kDefault_Variant;
380        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
381        paintOpts.setFontVariant(variant);
382        obj->setPaintOptionsAndroid(paintOpts);
383    }
384
385    static jfloat getTextSize(JNIEnv* env, jobject paint) {
386        NPE_CHECK_RETURN_ZERO(env, paint);
387        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
388    }
389
390    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
391        NPE_CHECK_RETURN_VOID(env, paint);
392        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
393    }
394
395    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
396        NPE_CHECK_RETURN_ZERO(env, paint);
397        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
398    }
399
400    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
401        NPE_CHECK_RETURN_VOID(env, paint);
402        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
403    }
404
405    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
406        NPE_CHECK_RETURN_ZERO(env, paint);
407        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
408    }
409
410    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
411        NPE_CHECK_RETURN_VOID(env, paint);
412        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
413    }
414
415    static jfloat ascent(JNIEnv* env, jobject paint) {
416        NPE_CHECK_RETURN_ZERO(env, paint);
417        SkPaint::FontMetrics    metrics;
418        (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics);
419        return SkScalarToFloat(metrics.fAscent);
420    }
421
422    static jfloat descent(JNIEnv* env, jobject paint) {
423        NPE_CHECK_RETURN_ZERO(env, paint);
424        SkPaint::FontMetrics    metrics;
425        (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics);
426        return SkScalarToFloat(metrics.fDescent);
427    }
428
429    static SkScalar getMetricsInternal(SkPaint *paint, SkPaint::FontMetrics *metrics) {
430        const int kElegantTop = 2500;
431        const int kElegantBottom = -1000;
432        const int kElegantAscent = 1946;
433        const int kElegantDescent = -512;
434        const int kElegantLeading = 0;
435        SkScalar spacing = paint->getFontMetrics(metrics);
436        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
437        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
438            SkScalar size = paint->getTextSize();
439            metrics->fTop = -size * kElegantTop / 2048;
440            metrics->fBottom = -size * kElegantBottom / 2048;
441            metrics->fAscent = -size * kElegantAscent / 2048;
442            metrics->fDescent = -size * kElegantDescent / 2048;
443            metrics->fLeading = size * kElegantLeading / 2048;
444            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
445        }
446        return spacing;
447    }
448
449    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
450        NPE_CHECK_RETURN_ZERO(env, paint);
451        SkPaint::FontMetrics metrics;
452        SkScalar spacing = getMetricsInternal(GraphicsJNI::getNativePaint(env, paint), &metrics);
453
454        if (metricsObj) {
455            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
456            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
457            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
458            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
459            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
460            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
461        }
462        return SkScalarToFloat(spacing);
463    }
464
465    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
466        NPE_CHECK_RETURN_ZERO(env, paint);
467        SkPaint::FontMetrics metrics;
468
469        getMetricsInternal(GraphicsJNI::getNativePaint(env, paint), &metrics);
470        int ascent = SkScalarRoundToInt(metrics.fAscent);
471        int descent = SkScalarRoundToInt(metrics.fDescent);
472        int leading = SkScalarRoundToInt(metrics.fLeading);
473
474        if (metricsObj) {
475            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
476            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
477            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
478            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
479            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
480            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
481        }
482        return descent - ascent + leading;
483    }
484
485    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
486            jint bidiFlags) {
487        NPE_CHECK_RETURN_ZERO(env, jpaint);
488        NPE_CHECK_RETURN_ZERO(env, text);
489
490        size_t textLength = env->GetArrayLength(text);
491        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
492            doThrowAIOOBE(env);
493            return 0;
494        }
495        if (count == 0) {
496            return 0;
497        }
498
499        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
500        const jchar* textArray = env->GetCharArrayElements(text, NULL);
501        jfloat result = 0;
502
503#ifdef USE_MINIKIN
504        Layout layout;
505        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
506        MinikinUtils::SetLayoutProperties(&layout, paint, typeface);
507        layout.doLayout(textArray + index, count);
508        result = layout.getAdvance();
509#else
510        TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength,
511                bidiFlags, NULL /* dont need all advances */, &result);
512#endif
513
514        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
515        return result;
516    }
517
518    static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end,
519            jint bidiFlags) {
520        NPE_CHECK_RETURN_ZERO(env, jpaint);
521        NPE_CHECK_RETURN_ZERO(env, text);
522
523        size_t textLength = env->GetStringLength(text);
524        int count = end - start;
525        if ((start | count) < 0 || (size_t)end > textLength) {
526            doThrowAIOOBE(env);
527            return 0;
528        }
529        if (count == 0) {
530            return 0;
531        }
532
533        const jchar* textArray = env->GetStringChars(text, NULL);
534        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
535        jfloat width = 0;
536
537#ifdef USE_MINIKIN
538        Layout layout;
539        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
540        MinikinUtils::SetLayoutProperties(&layout, paint, typeface);
541        layout.doLayout(textArray + start, count);
542        width = layout.getAdvance();
543#else
544        TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength,
545                bidiFlags, NULL /* dont need all advances */, &width);
546#endif
547
548        env->ReleaseStringChars(text, textArray);
549        return width;
550    }
551
552    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
553        NPE_CHECK_RETURN_ZERO(env, jpaint);
554        NPE_CHECK_RETURN_ZERO(env, text);
555
556        size_t textLength = env->GetStringLength(text);
557        if (textLength == 0) {
558            return 0;
559        }
560
561        const jchar* textArray = env->GetStringChars(text, NULL);
562        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
563        jfloat width = 0;
564
565#ifdef USE_MINIKIN
566        Layout layout;
567        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
568        MinikinUtils::SetLayoutProperties(&layout, paint, typeface);
569        layout.doLayout(textArray, textLength);
570        width = layout.getAdvance();
571#else
572        TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength,
573                bidiFlags, NULL /* dont need all advances */, &width);
574#endif
575
576        env->ReleaseStringChars(text, textArray);
577        return width;
578    }
579
580    static int dotextwidths(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar text[], int count,
581            jfloatArray widths, jint bidiFlags) {
582        NPE_CHECK_RETURN_ZERO(env, paint);
583        NPE_CHECK_RETURN_ZERO(env, text);
584
585        if (count < 0 || !widths) {
586            doThrowAIOOBE(env);
587            return 0;
588        }
589        if (count == 0) {
590            return 0;
591        }
592        size_t widthsLength = env->GetArrayLength(widths);
593        if ((size_t)count > widthsLength) {
594            doThrowAIOOBE(env);
595            return 0;
596        }
597
598        AutoJavaFloatArray autoWidths(env, widths, count);
599        jfloat* widthsArray = autoWidths.ptr();
600
601#ifdef USE_MINIKIN
602        Layout layout;
603        MinikinUtils::SetLayoutProperties(&layout, paint, typeface);
604        layout.doLayout(text, count);
605        layout.getAdvances(widthsArray);
606#else
607        TextLayout::getTextRunAdvances(paint, text, 0, count, count,
608                bidiFlags, widthsArray, NULL /* dont need totalAdvance */);
609#endif
610
611        return count;
612    }
613
614    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
615            jint index, jint count, jint bidiFlags, jfloatArray widths) {
616        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
617        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
618        const jchar* textArray = env->GetCharArrayElements(text, NULL);
619        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
620        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
621                                      JNI_ABORT);
622        return count;
623    }
624
625    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
626            jint start, jint end, jint bidiFlags, jfloatArray widths) {
627        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
628        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
629        const jchar* textArray = env->GetStringChars(text, NULL);
630        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
631        env->ReleaseStringChars(text, textArray);
632        return count;
633    }
634
635    static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count,
636            jint contextCount, jint flags, jcharArray glyphs) {
637        NPE_CHECK_RETURN_ZERO(env, paint);
638        NPE_CHECK_RETURN_ZERO(env, text);
639
640        if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) {
641            doThrowAIOOBE(env);
642            return 0;
643        }
644        if (count == 0) {
645            return 0;
646        }
647        size_t glypthsLength = env->GetArrayLength(glyphs);
648        if ((size_t)count > glypthsLength) {
649            doThrowAIOOBE(env);
650            return 0;
651        }
652
653        jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL);
654
655        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
656                text, start, count, contextCount, flags);
657        const jchar* shapedGlyphs = value->getGlyphs();
658        size_t glyphsCount = value->getGlyphsCount();
659        memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount);
660
661        env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT);
662        return glyphsCount;
663    }
664
665    static jint getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, jlong paintHandle,
666            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags,
667            jcharArray glyphs) {
668        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
669        const jchar* textArray = env->GetStringChars(text, NULL);
670        int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart,
671                end - start, contextEnd - contextStart, flags, glyphs);
672        env->ReleaseStringChars(text, textArray);
673        return count;
674    }
675
676    static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, TypefaceImpl* typeface, const jchar *text,
677                                    jint start, jint count, jint contextCount, jint flags,
678                                    jfloatArray advances, jint advancesIndex) {
679        NPE_CHECK_RETURN_ZERO(env, paint);
680        NPE_CHECK_RETURN_ZERO(env, text);
681
682        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
683            doThrowAIOOBE(env);
684            return 0;
685        }
686        if (count == 0) {
687            return 0;
688        }
689        if (advances) {
690            size_t advancesLength = env->GetArrayLength(advances);
691            if ((size_t)count > advancesLength) {
692                doThrowAIOOBE(env);
693                return 0;
694            }
695        }
696        jfloat* advancesArray = new jfloat[count];
697        jfloat totalAdvance = 0;
698
699#ifdef USE_MINIKIN
700        Layout layout;
701        MinikinUtils::SetLayoutProperties(&layout, paint, typeface);
702        layout.doLayout(text + start, count);
703        layout.getAdvances(advancesArray);
704        totalAdvance = layout.getAdvance();
705#else
706        TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags,
707                                       advancesArray, &totalAdvance);
708#endif
709
710        if (advances != NULL) {
711            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
712        }
713        delete [] advancesArray;
714        return totalAdvance;
715    }
716
717    static jfloat getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
718            jlong typefaceHandle,
719            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
720            jint flags, jfloatArray advances, jint advancesIndex) {
721        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
722        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
723        jchar* textArray = env->GetCharArrayElements(text, NULL);
724        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
725                index - contextIndex, count, contextCount, flags, advances, advancesIndex);
726        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
727        return result;
728    }
729
730    static jfloat getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
731            jlong typefaceHandle,
732            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags,
733            jfloatArray advances, jint advancesIndex) {
734        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
735        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
736        const jchar* textArray = env->GetStringChars(text, NULL);
737        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
738                start - contextStart, end - start, contextEnd - contextStart, flags,
739                advances, advancesIndex);
740        env->ReleaseStringChars(text, textArray);
741        return result;
742    }
743
744    static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start,
745            jint count, jint flags, jint offset, jint opt) {
746        jfloat scalarArray[count];
747
748        TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags,
749                scalarArray, NULL /* dont need totalAdvance */);
750
751        jint pos = offset - start;
752        switch (opt) {
753        case AFTER:
754          if (pos < count) {
755            pos += 1;
756          }
757          // fall through
758        case AT_OR_AFTER:
759          while (pos < count && scalarArray[pos] == 0) {
760            ++pos;
761          }
762          break;
763        case BEFORE:
764          if (pos > 0) {
765            --pos;
766          }
767          // fall through
768        case AT_OR_BEFORE:
769          while (pos > 0 && scalarArray[pos] == 0) {
770            --pos;
771          }
772          break;
773        case AT:
774        default:
775          if (scalarArray[pos] == 0) {
776            pos = -1;
777          }
778          break;
779        }
780
781        if (pos != -1) {
782          pos += start;
783        }
784
785        return pos;
786    }
787
788    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
789            jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) {
790        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
791        jchar* textArray = env->GetCharArrayElements(text, NULL);
792        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags,
793                offset, cursorOpt);
794        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
795        return result;
796    }
797
798    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
799            jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) {
800        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
801        const jchar* textArray = env->GetStringChars(text, NULL);
802        jint result = doTextRunCursor(env, paint, textArray, contextStart,
803                contextEnd - contextStart, flags, offset, cursorOpt);
804        env->ReleaseStringChars(text, textArray);
805        return result;
806    }
807
808    static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count,
809                            jint bidiFlags, jfloat x, jfloat y, SkPath *path) {
810        TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path);
811    }
812
813    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
814            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
815        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
816        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
817        const jchar* textArray = env->GetCharArrayElements(text, NULL);
818        getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path);
819        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
820    }
821
822    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
823            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
824        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
825        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
826        const jchar* textArray = env->GetStringChars(text, NULL);
827        getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path);
828        env->ReleaseStringChars(text, textArray);
829    }
830
831    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
832                               jfloat dx, jfloat dy, jint color) {
833        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
834        if (radius <= 0) {
835            paint->setLooper(NULL);
836        }
837        else {
838            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
839            paint->setLooper(new SkBlurDrawLooper((SkColor)color, sigma, dx, dy))->unref();
840        }
841    }
842
843    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
844        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
845        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
846    }
847
848    static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[],
849                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
850                         SkPaint::TextBufferDirection tbd) {
851        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
852                text, 0, count, count, bidiFlags);
853        if (value == NULL) {
854            return 0;
855        }
856        SkScalar     measured;
857        size_t       bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1,
858                maxWidth, &measured, tbd);
859        SkASSERT((bytes & 1) == 0);
860
861        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
862            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
863            jfloat* array = autoMeasured.ptr();
864            array[0] = SkScalarToFloat(measured);
865        }
866        return bytes >> 1;
867    }
868
869    static jint breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext,
870            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
871        NPE_CHECK_RETURN_ZERO(env, jpaint);
872        NPE_CHECK_RETURN_ZERO(env, jtext);
873
874        SkPaint::TextBufferDirection tbd;
875        if (count < 0) {
876            tbd = SkPaint::kBackward_TextBufferDirection;
877            count = -count;
878        }
879        else {
880            tbd = SkPaint::kForward_TextBufferDirection;
881        }
882
883        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
884            doThrowAIOOBE(env);
885            return 0;
886        }
887
888        SkPaint*     paint = GraphicsJNI::getNativePaint(env, jpaint);
889        const jchar* text = env->GetCharArrayElements(jtext, NULL);
890        count = breakText(env, *paint, text + index, count, maxWidth,
891                          bidiFlags, jmeasuredWidth, tbd);
892        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
893                                      JNI_ABORT);
894        return count;
895    }
896
897    static jint breakTextS(JNIEnv* env, jobject jpaint, jstring jtext,
898                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
899        NPE_CHECK_RETURN_ZERO(env, jpaint);
900        NPE_CHECK_RETURN_ZERO(env, jtext);
901
902        SkPaint::TextBufferDirection tbd = forwards ?
903                                        SkPaint::kForward_TextBufferDirection :
904                                        SkPaint::kBackward_TextBufferDirection;
905
906        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
907        int count = env->GetStringLength(jtext);
908        const jchar* text = env->GetStringChars(jtext, NULL);
909        count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
910        env->ReleaseStringChars(jtext, text);
911        return count;
912    }
913
914    static void doTextBounds(JNIEnv* env, const jchar* text, int count,
915                             jobject bounds, const SkPaint& paint, jint bidiFlags) {
916        SkRect  r;
917        SkIRect ir;
918
919        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
920                text, 0, count, count, bidiFlags);
921        if (value == NULL) {
922            return;
923        }
924        paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r);
925        r.roundOut(&ir);
926        GraphicsJNI::irect_to_jrect(ir, env, bounds);
927    }
928
929    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle,
930                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
931        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);;
932        const jchar* textArray = env->GetStringChars(text, NULL);
933        doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags);
934        env->ReleaseStringChars(text, textArray);
935    }
936
937    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle,
938                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
939        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
940        const jchar* textArray = env->GetCharArrayElements(text, NULL);
941        doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags);
942        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
943                                      JNI_ABORT);
944    }
945
946};
947
948static JNINativeMethod methods[] = {
949    {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer},
950    {"native_init","()J", (void*) SkPaintGlue::init},
951    {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint},
952    {"native_reset","(J)V", (void*) SkPaintGlue::reset},
953    {"native_set","(JJ)V", (void*) SkPaintGlue::assign},
954    {"getFlags","()I", (void*) SkPaintGlue::getFlags},
955    {"setFlags","(I)V", (void*) SkPaintGlue::setFlags},
956    {"getHinting","()I", (void*) SkPaintGlue::getHinting},
957    {"setHinting","(I)V", (void*) SkPaintGlue::setHinting},
958    {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias},
959    {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText},
960    {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText},
961    {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText},
962    {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText},
963    {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText},
964    {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap},
965    {"setDither","(Z)V", (void*) SkPaintGlue::setDither},
966    {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle},
967    {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle},
968    {"getColor","()I", (void*) SkPaintGlue::getColor},
969    {"setColor","(I)V", (void*) SkPaintGlue::setColor},
970    {"getAlpha","()I", (void*) SkPaintGlue::getAlpha},
971    {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha},
972    {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth},
973    {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth},
974    {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter},
975    {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter},
976    {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap},
977    {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap},
978    {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin},
979    {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin},
980    {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath},
981    {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader},
982    {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter},
983    {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode},
984    {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect},
985    {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter},
986    {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface},
987    {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer},
988    {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign},
989    {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign},
990    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale},
991    {"isElegantTextHeight","()Z", (void*) SkPaintGlue::isElegantTextHeight},
992    {"setElegantTextHeight","(Z)V", (void*) SkPaintGlue::setElegantTextHeight},
993    {"getTextSize","()F", (void*) SkPaintGlue::getTextSize},
994    {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize},
995    {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX},
996    {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX},
997    {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX},
998    {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX},
999    {"ascent","()F", (void*) SkPaintGlue::ascent},
1000    {"descent","()F", (void*) SkPaintGlue::descent},
1001    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics},
1002    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt},
1003    {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII},
1004    {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI},
1005    {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII},
1006    {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC},
1007    {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS},
1008    {"native_getTextWidths","(JJ[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F},
1009    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F},
1010    {"native_getTextRunAdvances","(JJ[CIIIII[FI)F",
1011        (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI},
1012    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIII[FI)F",
1013        (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI},
1014
1015
1016    {"native_getTextGlyphs","(JLjava/lang/String;IIIII[C)I",
1017        (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C},
1018    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C},
1019    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1020        (void*) SkPaintGlue::getTextRunCursor__String},
1021    {"native_getTextPath","(JI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C},
1022    {"native_getTextPath","(JILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String},
1023    {"nativeGetStringBounds", "(JLjava/lang/String;IIILandroid/graphics/Rect;)V",
1024                                        (void*) SkPaintGlue::getStringBounds },
1025    {"nativeGetCharArrayBounds", "(J[CIIILandroid/graphics/Rect;)V",
1026                                    (void*) SkPaintGlue::getCharArrayBounds },
1027    {"native_setShadowLayer", "(JFFFI)V", (void*)SkPaintGlue::setShadowLayer},
1028    {"native_hasShadowLayer", "(J)Z", (void*)SkPaintGlue::hasShadowLayer}
1029};
1030
1031static jfieldID req_fieldID(jfieldID id) {
1032    SkASSERT(id);
1033    return id;
1034}
1035
1036int register_android_graphics_Paint(JNIEnv* env) {
1037    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1038    SkASSERT(gFontMetrics_class);
1039    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1040
1041    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1042    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1043    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1044    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1045    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1046
1047    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1048    SkASSERT(gFontMetricsInt_class);
1049    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1050
1051    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1052    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1053    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1054    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1055    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1056
1057    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1058        sizeof(methods) / sizeof(methods[0]));
1059    return result;
1060}
1061
1062}
1063