Paint.cpp revision 4c9355c35a0f62805739823a62ad41ca1cbc6502 
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    // 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        SkPaint* 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() != SkPaint::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        SkPaint* nativePaint = GraphicsJNI::getNativePaint(env, paint);
126        // Instead of modifying 0x02, change the filter level.
127        nativePaint->setFilterLevel(flags & sFilterBitmapFlag
128                ? SkPaint::kLow_FilterLevel
129                : SkPaint::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                == SkPaint::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 ? SkPaint::kNo_Hinting : SkPaint::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 ? SkPaint::kLow_FilterLevel : SkPaint::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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
193        return static_cast<jint>(obj->getStyle());
194    }
195
196    static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) {
197        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
198        SkPaint::Style style = static_cast<SkPaint::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        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
248        return static_cast<jint>(obj->getStrokeCap());
249    }
250
251    static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) {
252        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
253        SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle);
254        obj->setStrokeCap(cap);
255    }
256
257    static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) {
258        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
259        return static_cast<jint>(obj->getStrokeJoin());
260    }
261
262    static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) {
263        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
264        SkPaint::Join join = (SkPaint::Join) joinHandle;
265        obj->setStrokeJoin(join);
266    }
267
268    static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) {
269        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint *>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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        SkPaint* obj = reinterpret_cast<SkPaint*>(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#ifndef USE_MINIKIN
307        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
308        SkTypeface* typeface = reinterpret_cast<SkTypeface*>(typefaceHandle);
309        return reinterpret_cast<jlong>(obj->setTypeface(typeface));
310#else
311        // TODO(raph): not yet implemented
312        return NULL;
313#endif
314    }
315
316    static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) {
317        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
318        SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle));
319        return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer));
320    }
321
322    static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) {
323        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
324        return static_cast<jint>(obj->getTextAlign());
325    }
326
327    static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) {
328        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
329        SkPaint::Align align = static_cast<SkPaint::Align>(alignHandle);
330        obj->setTextAlign(align);
331    }
332
333    // generate bcp47 identifier for the supplied locale
334    static void toLanguageTag(char* output, size_t outSize,
335            const char* locale) {
336        if (output == NULL || outSize <= 0) {
337            return;
338        }
339        if (locale == NULL) {
340            output[0] = '\0';
341            return;
342        }
343        char canonicalChars[ULOC_FULLNAME_CAPACITY];
344        UErrorCode uErr = U_ZERO_ERROR;
345        uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY,
346                &uErr);
347        if (U_SUCCESS(uErr)) {
348            char likelyChars[ULOC_FULLNAME_CAPACITY];
349            uErr = U_ZERO_ERROR;
350            uloc_addLikelySubtags(canonicalChars, likelyChars,
351                    ULOC_FULLNAME_CAPACITY, &uErr);
352            if (U_SUCCESS(uErr)) {
353                uErr = U_ZERO_ERROR;
354                uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr);
355                if (U_SUCCESS(uErr)) {
356                    return;
357                } else {
358                    ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars,
359                            u_errorName(uErr));
360                }
361            } else {
362                ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s",
363                        canonicalChars, u_errorName(uErr));
364            }
365        } else {
366            ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale,
367                    u_errorName(uErr));
368        }
369        // unable to build a proper language identifier
370        output[0] = '\0';
371    }
372
373    static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) {
374        SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle);
375        ScopedUtfChars localeChars(env, locale);
376        char langTag[ULOC_FULLNAME_CAPACITY];
377        toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str());
378
379        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
380        paintOpts.setLanguage(langTag);
381        obj->setPaintOptionsAndroid(paintOpts);
382    }
383
384    static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) {
385        NPE_CHECK_RETURN_ZERO(env, paint);
386        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
387        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
388        return paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant;
389    }
390
391    static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) {
392        NPE_CHECK_RETURN_VOID(env, paint);
393        SkPaint* obj = GraphicsJNI::getNativePaint(env, paint);
394        SkPaintOptionsAndroid::FontVariant variant =
395            aa ? SkPaintOptionsAndroid::kElegant_Variant :
396            SkPaintOptionsAndroid::kDefault_Variant;
397        SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid();
398        paintOpts.setFontVariant(variant);
399        obj->setPaintOptionsAndroid(paintOpts);
400    }
401
402    static jfloat getTextSize(JNIEnv* env, jobject paint) {
403        NPE_CHECK_RETURN_ZERO(env, paint);
404        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize());
405    }
406
407    static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) {
408        NPE_CHECK_RETURN_VOID(env, paint);
409        GraphicsJNI::getNativePaint(env, paint)->setTextSize(textSize);
410    }
411
412    static jfloat getTextScaleX(JNIEnv* env, jobject paint) {
413        NPE_CHECK_RETURN_ZERO(env, paint);
414        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX());
415    }
416
417    static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) {
418        NPE_CHECK_RETURN_VOID(env, paint);
419        GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(scaleX);
420    }
421
422    static jfloat getTextSkewX(JNIEnv* env, jobject paint) {
423        NPE_CHECK_RETURN_ZERO(env, paint);
424        return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX());
425    }
426
427    static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) {
428        NPE_CHECK_RETURN_VOID(env, paint);
429        GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(skewX);
430    }
431
432    static jfloat ascent(JNIEnv* env, jobject paint) {
433        NPE_CHECK_RETURN_ZERO(env, paint);
434        SkPaint::FontMetrics    metrics;
435        (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics);
436        return SkScalarToFloat(metrics.fAscent);
437    }
438
439    static jfloat descent(JNIEnv* env, jobject paint) {
440        NPE_CHECK_RETURN_ZERO(env, paint);
441        SkPaint::FontMetrics    metrics;
442        (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics);
443        return SkScalarToFloat(metrics.fDescent);
444    }
445
446    static SkScalar getMetricsInternal(SkPaint *paint, SkPaint::FontMetrics *metrics) {
447        const int kElegantTop = 2500;
448        const int kElegantBottom = -1000;
449        const int kElegantAscent = 1946;
450        const int kElegantDescent = -512;
451        const int kElegantLeading = 0;
452        SkScalar spacing = paint->getFontMetrics(metrics);
453        SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid();
454        if (paintOpts.getFontVariant() == SkPaintOptionsAndroid::kElegant_Variant) {
455            SkScalar size = paint->getTextSize();
456            metrics->fTop = -size * kElegantTop / 2048;
457            metrics->fBottom = -size * kElegantBottom / 2048;
458            metrics->fAscent = -size * kElegantAscent / 2048;
459            metrics->fDescent = -size * kElegantDescent / 2048;
460            metrics->fLeading = size * kElegantLeading / 2048;
461            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
462        }
463        return spacing;
464    }
465
466    static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) {
467        NPE_CHECK_RETURN_ZERO(env, paint);
468        SkPaint::FontMetrics metrics;
469        SkScalar spacing = getMetricsInternal(GraphicsJNI::getNativePaint(env, paint), &metrics);
470
471        if (metricsObj) {
472            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
473            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
474            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
475            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
476            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
477            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
478        }
479        return SkScalarToFloat(spacing);
480    }
481
482    static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) {
483        NPE_CHECK_RETURN_ZERO(env, paint);
484        SkPaint::FontMetrics metrics;
485
486        getMetricsInternal(GraphicsJNI::getNativePaint(env, paint), &metrics);
487        int ascent = SkScalarRoundToInt(metrics.fAscent);
488        int descent = SkScalarRoundToInt(metrics.fDescent);
489        int leading = SkScalarRoundToInt(metrics.fLeading);
490
491        if (metricsObj) {
492            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
493            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
494            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
495            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
496            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
497            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
498        }
499        return descent - ascent + leading;
500    }
501
502    static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count,
503            jint bidiFlags) {
504        NPE_CHECK_RETURN_ZERO(env, jpaint);
505        NPE_CHECK_RETURN_ZERO(env, text);
506
507        size_t textLength = env->GetArrayLength(text);
508        if ((index | count) < 0 || (size_t)(index + count) > textLength) {
509            doThrowAIOOBE(env);
510            return 0;
511        }
512        if (count == 0) {
513            return 0;
514        }
515
516        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
517        const jchar* textArray = env->GetCharArrayElements(text, NULL);
518        jfloat result = 0;
519
520#ifdef USE_MINIKIN
521        Layout layout;
522        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
523        MinikinUtils::SetLayoutProperties(&layout, paint, bidiFlags, typeface);
524        layout.doLayout(textArray + index, count);
525        result = layout.getAdvance();
526#else
527        TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength,
528                bidiFlags, NULL /* dont need all advances */, &result);
529#endif
530
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        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
552        jfloat width = 0;
553
554#ifdef USE_MINIKIN
555        Layout layout;
556        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
557        MinikinUtils::SetLayoutProperties(&layout, paint, bidiFlags, typeface);
558        layout.doLayout(textArray + start, count);
559        width = layout.getAdvance();
560#else
561        TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength,
562                bidiFlags, NULL /* dont need all advances */, &width);
563#endif
564
565        env->ReleaseStringChars(text, textArray);
566        return width;
567    }
568
569    static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) {
570        NPE_CHECK_RETURN_ZERO(env, jpaint);
571        NPE_CHECK_RETURN_ZERO(env, text);
572
573        size_t textLength = env->GetStringLength(text);
574        if (textLength == 0) {
575            return 0;
576        }
577
578        const jchar* textArray = env->GetStringChars(text, NULL);
579        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
580        jfloat width = 0;
581
582#ifdef USE_MINIKIN
583        Layout layout;
584        TypefaceImpl* typeface = GraphicsJNI::getNativeTypeface(env, jpaint);
585        MinikinUtils::SetLayoutProperties(&layout, paint, bidiFlags, typeface);
586        layout.doLayout(textArray, textLength);
587        width = layout.getAdvance();
588#else
589        TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength,
590                bidiFlags, NULL /* dont need all advances */, &width);
591#endif
592
593        env->ReleaseStringChars(text, textArray);
594        return width;
595    }
596
597    static int dotextwidths(JNIEnv* env, SkPaint* paint, TypefaceImpl* typeface, const jchar text[], int count,
598            jfloatArray widths, jint bidiFlags) {
599        NPE_CHECK_RETURN_ZERO(env, paint);
600        NPE_CHECK_RETURN_ZERO(env, text);
601
602        if (count < 0 || !widths) {
603            doThrowAIOOBE(env);
604            return 0;
605        }
606        if (count == 0) {
607            return 0;
608        }
609        size_t widthsLength = env->GetArrayLength(widths);
610        if ((size_t)count > widthsLength) {
611            doThrowAIOOBE(env);
612            return 0;
613        }
614
615        AutoJavaFloatArray autoWidths(env, widths, count);
616        jfloat* widthsArray = autoWidths.ptr();
617
618#ifdef USE_MINIKIN
619        Layout layout;
620        MinikinUtils::SetLayoutProperties(&layout, paint, bidiFlags, typeface);
621        layout.doLayout(text, count);
622        layout.getAdvances(widthsArray);
623#else
624        TextLayout::getTextRunAdvances(paint, text, 0, count, count,
625                bidiFlags, widthsArray, NULL /* dont need totalAdvance */);
626#endif
627
628        return count;
629    }
630
631    static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text,
632            jint index, jint count, jint bidiFlags, jfloatArray widths) {
633        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
634        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
635        const jchar* textArray = env->GetCharArrayElements(text, NULL);
636        count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags);
637        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
638                                      JNI_ABORT);
639        return count;
640    }
641
642    static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text,
643            jint start, jint end, jint bidiFlags, jfloatArray widths) {
644        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
645        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
646        const jchar* textArray = env->GetStringChars(text, NULL);
647        int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags);
648        env->ReleaseStringChars(text, textArray);
649        return count;
650    }
651
652    static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count,
653            jint contextCount, jint flags, jcharArray glyphs) {
654        NPE_CHECK_RETURN_ZERO(env, paint);
655        NPE_CHECK_RETURN_ZERO(env, text);
656
657        if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) {
658            doThrowAIOOBE(env);
659            return 0;
660        }
661        if (count == 0) {
662            return 0;
663        }
664        size_t glypthsLength = env->GetArrayLength(glyphs);
665        if ((size_t)count > glypthsLength) {
666            doThrowAIOOBE(env);
667            return 0;
668        }
669
670        jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL);
671
672        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
673                text, start, count, contextCount, flags);
674        const jchar* shapedGlyphs = value->getGlyphs();
675        size_t glyphsCount = value->getGlyphsCount();
676        memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount);
677
678        env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT);
679        return glyphsCount;
680    }
681
682    static jint getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, jlong paintHandle,
683            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags,
684            jcharArray glyphs) {
685        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
686        const jchar* textArray = env->GetStringChars(text, NULL);
687        int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart,
688                end - start, contextEnd - contextStart, flags, glyphs);
689        env->ReleaseStringChars(text, textArray);
690        return count;
691    }
692
693    static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, TypefaceImpl* typeface, const jchar *text,
694                                    jint start, jint count, jint contextCount, jint flags,
695                                    jfloatArray advances, jint advancesIndex) {
696        NPE_CHECK_RETURN_ZERO(env, paint);
697        NPE_CHECK_RETURN_ZERO(env, text);
698
699        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
700            doThrowAIOOBE(env);
701            return 0;
702        }
703        if (count == 0) {
704            return 0;
705        }
706        if (advances) {
707            size_t advancesLength = env->GetArrayLength(advances);
708            if ((size_t)count > advancesLength) {
709                doThrowAIOOBE(env);
710                return 0;
711            }
712        }
713        jfloat* advancesArray = new jfloat[count];
714        jfloat totalAdvance = 0;
715
716#ifdef USE_MINIKIN
717        Layout layout;
718        MinikinUtils::SetLayoutProperties(&layout, paint, flags, typeface);
719        layout.doLayout(text + start, count);
720        layout.getAdvances(advancesArray);
721        totalAdvance = layout.getAdvance();
722#else
723        TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags,
724                                       advancesArray, &totalAdvance);
725#endif
726
727        if (advances != NULL) {
728            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
729        }
730        delete [] advancesArray;
731        return totalAdvance;
732    }
733
734    static jfloat getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
735            jlong typefaceHandle,
736            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
737            jint flags, jfloatArray advances, jint advancesIndex) {
738        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
739        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
740        jchar* textArray = env->GetCharArrayElements(text, NULL);
741        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex,
742                index - contextIndex, count, contextCount, flags, advances, advancesIndex);
743        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
744        return result;
745    }
746
747    static jfloat getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
748            jlong typefaceHandle,
749            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags,
750            jfloatArray advances, jint advancesIndex) {
751        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
752        TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle);
753        const jchar* textArray = env->GetStringChars(text, NULL);
754        jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart,
755                start - contextStart, end - start, contextEnd - contextStart, flags,
756                advances, advancesIndex);
757        env->ReleaseStringChars(text, textArray);
758        return result;
759    }
760
761    static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start,
762            jint count, jint flags, jint offset, jint opt) {
763        jfloat scalarArray[count];
764
765        TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags,
766                scalarArray, NULL /* dont need totalAdvance */);
767
768        jint pos = offset - start;
769        switch (opt) {
770        case AFTER:
771          if (pos < count) {
772            pos += 1;
773          }
774          // fall through
775        case AT_OR_AFTER:
776          while (pos < count && scalarArray[pos] == 0) {
777            ++pos;
778          }
779          break;
780        case BEFORE:
781          if (pos > 0) {
782            --pos;
783          }
784          // fall through
785        case AT_OR_BEFORE:
786          while (pos > 0 && scalarArray[pos] == 0) {
787            --pos;
788          }
789          break;
790        case AT:
791        default:
792          if (scalarArray[pos] == 0) {
793            pos = -1;
794          }
795          break;
796        }
797
798        if (pos != -1) {
799          pos += start;
800        }
801
802        return pos;
803    }
804
805    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
806            jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) {
807        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
808        jchar* textArray = env->GetCharArrayElements(text, NULL);
809        jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags,
810                offset, cursorOpt);
811        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
812        return result;
813    }
814
815    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text,
816            jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) {
817        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
818        const jchar* textArray = env->GetStringChars(text, NULL);
819        jint result = doTextRunCursor(env, paint, textArray, contextStart,
820                contextEnd - contextStart, flags, offset, cursorOpt);
821        env->ReleaseStringChars(text, textArray);
822        return result;
823    }
824
825    static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count,
826                            jint bidiFlags, jfloat x, jfloat y, SkPath *path) {
827        TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path);
828    }
829
830    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
831            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
832        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
833        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
834        const jchar* textArray = env->GetCharArrayElements(text, NULL);
835        getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path);
836        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
837    }
838
839    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
840            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
841        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
842        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
843        const jchar* textArray = env->GetStringChars(text, NULL);
844        getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path);
845        env->ReleaseStringChars(text, textArray);
846    }
847
848    static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius,
849                               jfloat dx, jfloat dy, jint color) {
850        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
851        if (radius <= 0) {
852            paint->setLooper(NULL);
853        }
854        else {
855            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
856            paint->setLooper(new SkBlurDrawLooper((SkColor)color, sigma, dx, dy))->unref();
857        }
858    }
859
860    static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) {
861        SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
862        return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL);
863    }
864
865    static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[],
866                         int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
867                         SkPaint::TextBufferDirection tbd) {
868        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
869                text, 0, count, count, bidiFlags);
870        if (value == NULL) {
871            return 0;
872        }
873        SkScalar     measured;
874        size_t       bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1,
875                maxWidth, &measured, tbd);
876        SkASSERT((bytes & 1) == 0);
877
878        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
879            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
880            jfloat* array = autoMeasured.ptr();
881            array[0] = SkScalarToFloat(measured);
882        }
883        return bytes >> 1;
884    }
885
886    static jint breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext,
887            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
888        NPE_CHECK_RETURN_ZERO(env, jpaint);
889        NPE_CHECK_RETURN_ZERO(env, jtext);
890
891        SkPaint::TextBufferDirection tbd;
892        if (count < 0) {
893            tbd = SkPaint::kBackward_TextBufferDirection;
894            count = -count;
895        }
896        else {
897            tbd = SkPaint::kForward_TextBufferDirection;
898        }
899
900        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
901            doThrowAIOOBE(env);
902            return 0;
903        }
904
905        SkPaint*     paint = GraphicsJNI::getNativePaint(env, jpaint);
906        const jchar* text = env->GetCharArrayElements(jtext, NULL);
907        count = breakText(env, *paint, text + index, count, maxWidth,
908                          bidiFlags, jmeasuredWidth, tbd);
909        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
910                                      JNI_ABORT);
911        return count;
912    }
913
914    static jint breakTextS(JNIEnv* env, jobject jpaint, jstring jtext,
915                jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
916        NPE_CHECK_RETURN_ZERO(env, jpaint);
917        NPE_CHECK_RETURN_ZERO(env, jtext);
918
919        SkPaint::TextBufferDirection tbd = forwards ?
920                                        SkPaint::kForward_TextBufferDirection :
921                                        SkPaint::kBackward_TextBufferDirection;
922
923        SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint);
924        int count = env->GetStringLength(jtext);
925        const jchar* text = env->GetStringChars(jtext, NULL);
926        count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd);
927        env->ReleaseStringChars(jtext, text);
928        return count;
929    }
930
931    static void doTextBounds(JNIEnv* env, const jchar* text, int count,
932                             jobject bounds, const SkPaint& paint, jint bidiFlags) {
933        SkRect  r;
934        SkIRect ir;
935
936        sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint,
937                text, 0, count, count, bidiFlags);
938        if (value == NULL) {
939            return;
940        }
941        paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r);
942        r.roundOut(&ir);
943        GraphicsJNI::irect_to_jrect(ir, env, bounds);
944    }
945
946    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle,
947                                jstring text, jint start, jint end, jint bidiFlags, jobject bounds) {
948        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);;
949        const jchar* textArray = env->GetStringChars(text, NULL);
950        doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags);
951        env->ReleaseStringChars(text, textArray);
952    }
953
954    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle,
955                        jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) {
956        const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);
957        const jchar* textArray = env->GetCharArrayElements(text, NULL);
958        doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags);
959        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
960                                      JNI_ABORT);
961    }
962
963};
964
965static JNINativeMethod methods[] = {
966    {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer},
967    {"native_init","()J", (void*) SkPaintGlue::init},
968    {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint},
969    {"native_reset","(J)V", (void*) SkPaintGlue::reset},
970    {"native_set","(JJ)V", (void*) SkPaintGlue::assign},
971    {"getFlags","()I", (void*) SkPaintGlue::getFlags},
972    {"setFlags","(I)V", (void*) SkPaintGlue::setFlags},
973    {"getHinting","()I", (void*) SkPaintGlue::getHinting},
974    {"setHinting","(I)V", (void*) SkPaintGlue::setHinting},
975    {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias},
976    {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText},
977    {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText},
978    {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText},
979    {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText},
980    {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText},
981    {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap},
982    {"setDither","(Z)V", (void*) SkPaintGlue::setDither},
983    {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle},
984    {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle},
985    {"getColor","()I", (void*) SkPaintGlue::getColor},
986    {"setColor","(I)V", (void*) SkPaintGlue::setColor},
987    {"getAlpha","()I", (void*) SkPaintGlue::getAlpha},
988    {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha},
989    {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth},
990    {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth},
991    {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter},
992    {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter},
993    {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap},
994    {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap},
995    {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin},
996    {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin},
997    {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath},
998    {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader},
999    {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter},
1000    {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode},
1001    {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect},
1002    {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter},
1003    {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface},
1004    {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer},
1005    {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign},
1006    {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign},
1007    {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale},
1008    {"isElegantTextHeight","()Z", (void*) SkPaintGlue::isElegantTextHeight},
1009    {"setElegantTextHeight","(Z)V", (void*) SkPaintGlue::setElegantTextHeight},
1010    {"getTextSize","()F", (void*) SkPaintGlue::getTextSize},
1011    {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize},
1012    {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX},
1013    {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX},
1014    {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX},
1015    {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX},
1016    {"ascent","()F", (void*) SkPaintGlue::ascent},
1017    {"descent","()F", (void*) SkPaintGlue::descent},
1018    {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics},
1019    {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt},
1020    {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII},
1021    {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI},
1022    {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII},
1023    {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC},
1024    {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS},
1025    {"native_getTextWidths","(JJ[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F},
1026    {"native_getTextWidths","(JJLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F},
1027    {"native_getTextRunAdvances","(JJ[CIIIII[FI)F",
1028        (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI},
1029    {"native_getTextRunAdvances","(JJLjava/lang/String;IIIII[FI)F",
1030        (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI},
1031
1032
1033    {"native_getTextGlyphs","(JLjava/lang/String;IIIII[C)I",
1034        (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C},
1035    {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C},
1036    {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I",
1037        (void*) SkPaintGlue::getTextRunCursor__String},
1038    {"native_getTextPath","(JI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C},
1039    {"native_getTextPath","(JILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String},
1040    {"nativeGetStringBounds", "(JLjava/lang/String;IIILandroid/graphics/Rect;)V",
1041                                        (void*) SkPaintGlue::getStringBounds },
1042    {"nativeGetCharArrayBounds", "(J[CIIILandroid/graphics/Rect;)V",
1043                                    (void*) SkPaintGlue::getCharArrayBounds },
1044    {"native_setShadowLayer", "(JFFFI)V", (void*)SkPaintGlue::setShadowLayer},
1045    {"native_hasShadowLayer", "(J)Z", (void*)SkPaintGlue::hasShadowLayer}
1046};
1047
1048static jfieldID req_fieldID(jfieldID id) {
1049    SkASSERT(id);
1050    return id;
1051}
1052
1053int register_android_graphics_Paint(JNIEnv* env) {
1054    gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics");
1055    SkASSERT(gFontMetrics_class);
1056    gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class);
1057
1058    gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F"));
1059    gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F"));
1060    gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F"));
1061    gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F"));
1062    gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F"));
1063
1064    gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt");
1065    SkASSERT(gFontMetricsInt_class);
1066    gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class);
1067
1068    gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I"));
1069    gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I"));
1070    gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I"));
1071    gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I"));
1072    gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I"));
1073
1074    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods,
1075        sizeof(methods) / sizeof(methods[0]));
1076    return result;
1077}
1078
1079}
1080