/* libs/android_runtime/android/graphics/Paint.cpp ** ** Copyright 2006, The Android Open Source Project ** ** Licensed under the Apache License, Version 2.0 (the "License"); ** you may not use this file except in compliance with the License. ** You may obtain a copy of the License at ** ** http://www.apache.org/licenses/LICENSE-2.0 ** ** Unless required by applicable law or agreed to in writing, software ** distributed under the License is distributed on an "AS IS" BASIS, ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. ** See the License for the specific language governing permissions and ** limitations under the License. */ #define LOG_TAG "Paint" #include <utils/Log.h> #include "jni.h" #include "GraphicsJNI.h" #include "core_jni_helpers.h" #include <ScopedStringChars.h> #include <ScopedUtfChars.h> #include "SkBlurDrawLooper.h" #include "SkColorFilter.h" #include "SkMaskFilter.h" #include "SkPath.h" #include "SkRasterizer.h" #include "SkShader.h" #include "SkTypeface.h" #include "SkXfermode.h" #include "unicode/uloc.h" #include "unicode/ushape.h" #include "utils/Blur.h" #include <hwui/MinikinSkia.h> #include <hwui/MinikinUtils.h> #include <hwui/Paint.h> #include <hwui/Typeface.h> #include <minikin/GraphemeBreak.h> #include <minikin/Measurement.h> #include <unicode/utf16.h> #include <cassert> #include <cstring> #include <memory> #include <vector> namespace android { struct JMetricsID { jfieldID top; jfieldID ascent; jfieldID descent; jfieldID bottom; jfieldID leading; }; static jclass gFontMetrics_class; static JMetricsID gFontMetrics_fieldID; static jclass gFontMetricsInt_class; static JMetricsID gFontMetricsInt_fieldID; static void defaultSettingsForAndroid(Paint* paint) { // GlyphID encoding is required because we are using Harfbuzz shaping paint->setTextEncoding(Paint::kGlyphID_TextEncoding); } namespace PaintGlue { enum MoveOpt { AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT }; static void deletePaint(Paint* paint) { delete paint; } static jlong getNativeFinalizer(JNIEnv*, jobject) { return static_cast<jlong>(reinterpret_cast<uintptr_t>(&deletePaint)); } static jlong init(JNIEnv* env, jobject) { static_assert(1 << 0 == SkPaint::kAntiAlias_Flag, "paint_flags_mismatch"); static_assert(1 << 2 == SkPaint::kDither_Flag, "paint_flags_mismatch"); static_assert(1 << 3 == SkPaint::kUnderlineText_Flag, "paint_flags_mismatch"); static_assert(1 << 4 == SkPaint::kStrikeThruText_Flag, "paint_flags_mismatch"); static_assert(1 << 5 == SkPaint::kFakeBoldText_Flag, "paint_flags_mismatch"); static_assert(1 << 6 == SkPaint::kLinearText_Flag, "paint_flags_mismatch"); static_assert(1 << 7 == SkPaint::kSubpixelText_Flag, "paint_flags_mismatch"); static_assert(1 << 8 == SkPaint::kDevKernText_Flag, "paint_flags_mismatch"); static_assert(1 << 10 == SkPaint::kEmbeddedBitmapText_Flag, "paint_flags_mismatch"); Paint* obj = new Paint(); defaultSettingsForAndroid(obj); return reinterpret_cast<jlong>(obj); } static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); Paint* obj = new Paint(*paint); return reinterpret_cast<jlong>(obj); } static void reset(JNIEnv* env, jobject clazz, jlong objHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); obj->reset(); defaultSettingsForAndroid(obj); } static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) { Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle); const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle); *dst = *src; } // Equivalent to the Java Paint's FILTER_BITMAP_FLAG. static const uint32_t sFilterBitmapFlag = 0x02; static jint getFlags(JNIEnv* env, jobject, jlong paintHandle) { Paint* nativePaint = reinterpret_cast<Paint*>(paintHandle); uint32_t result = nativePaint->getFlags(); result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away. if (nativePaint->getFilterQuality() != kNone_SkFilterQuality) { result |= sFilterBitmapFlag; } return static_cast<jint>(result); } static void setFlags(JNIEnv* env, jobject, jlong paintHandle, jint flags) { Paint* nativePaint = reinterpret_cast<Paint*>(paintHandle); // Instead of modifying 0x02, change the filter level. nativePaint->setFilterQuality(flags & sFilterBitmapFlag ? kLow_SkFilterQuality : kNone_SkFilterQuality); // Don't pass through filter flag, which is no longer stored in paint's flags. flags &= ~sFilterBitmapFlag; // Use the existing value for 0x02. const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag; flags |= existing0x02Flag; nativePaint->setFlags(flags); } static jint getHinting(JNIEnv* env, jobject, jlong paintHandle) { return reinterpret_cast<Paint*>(paintHandle)->getHinting() == Paint::kNo_Hinting ? 0 : 1; } static void setHinting(JNIEnv* env, jobject, jlong paintHandle, jint mode) { reinterpret_cast<Paint*>(paintHandle)->setHinting( mode == 0 ? Paint::kNo_Hinting : Paint::kNormal_Hinting); } static void setAntiAlias(JNIEnv* env, jobject, jlong paintHandle, jboolean aa) { reinterpret_cast<Paint*>(paintHandle)->setAntiAlias(aa); } static void setLinearText(JNIEnv* env, jobject, jlong paintHandle, jboolean linearText) { reinterpret_cast<Paint*>(paintHandle)->setLinearText(linearText); } static void setSubpixelText(JNIEnv* env, jobject, jlong paintHandle, jboolean subpixelText) { reinterpret_cast<Paint*>(paintHandle)->setSubpixelText(subpixelText); } static void setUnderlineText(JNIEnv* env, jobject, jlong paintHandle, jboolean underlineText) { reinterpret_cast<Paint*>(paintHandle)->setUnderlineText(underlineText); } static void setStrikeThruText(JNIEnv* env, jobject, jlong paintHandle, jboolean strikeThruText) { reinterpret_cast<Paint*>(paintHandle)->setStrikeThruText(strikeThruText); } static void setFakeBoldText(JNIEnv* env, jobject, jlong paintHandle, jboolean fakeBoldText) { reinterpret_cast<Paint*>(paintHandle)->setFakeBoldText(fakeBoldText); } static void setFilterBitmap(JNIEnv* env, jobject, jlong paintHandle, jboolean filterBitmap) { reinterpret_cast<Paint*>(paintHandle)->setFilterQuality( filterBitmap ? kLow_SkFilterQuality : kNone_SkFilterQuality); } static void setDither(JNIEnv* env, jobject, jlong paintHandle, jboolean dither) { reinterpret_cast<Paint*>(paintHandle)->setDither(dither); } static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); return static_cast<jint>(obj->getStyle()); } static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); Paint::Style style = static_cast<Paint::Style>(styleHandle); obj->setStyle(style); } static jint getColor(JNIEnv* env, jobject, jlong paintHandle) { int color; color = reinterpret_cast<Paint*>(paintHandle)->getColor(); return static_cast<jint>(color); } static jint getAlpha(JNIEnv* env, jobject, jlong paintHandle) { int alpha; alpha = reinterpret_cast<Paint*>(paintHandle)->getAlpha(); return static_cast<jint>(alpha); } static void setColor(JNIEnv* env, jobject, jlong paintHandle, jint color) { reinterpret_cast<Paint*>(paintHandle)->setColor(color); } static void setAlpha(JNIEnv* env, jobject, jlong paintHandle, jint a) { reinterpret_cast<Paint*>(paintHandle)->setAlpha(a); } static jfloat getStrokeWidth(JNIEnv* env, jobject, jlong paintHandle) { return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getStrokeWidth()); } static void setStrokeWidth(JNIEnv* env, jobject, jlong paintHandle, jfloat width) { reinterpret_cast<Paint*>(paintHandle)->setStrokeWidth(width); } static jfloat getStrokeMiter(JNIEnv* env, jobject, jlong paintHandle) { return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getStrokeMiter()); } static void setStrokeMiter(JNIEnv* env, jobject, jlong paintHandle, jfloat miter) { reinterpret_cast<Paint*>(paintHandle)->setStrokeMiter(miter); } static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); return static_cast<jint>(obj->getStrokeCap()); } static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); Paint::Cap cap = static_cast<Paint::Cap>(capHandle); obj->setStrokeCap(cap); } static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); return static_cast<jint>(obj->getStrokeJoin()); } static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); Paint::Join join = (Paint::Join) joinHandle; obj->setStrokeJoin(join); } static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkPath* src = reinterpret_cast<SkPath*>(srcHandle); SkPath* dst = reinterpret_cast<SkPath*>(dstHandle); return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE; } static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle); return reinterpret_cast<jlong>(obj->setShader(shader)); } static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) { Paint* obj = reinterpret_cast<Paint *>(objHandle); SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(filterHandle); return reinterpret_cast<jlong>(obj->setColorFilter(filter)); } static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle); return reinterpret_cast<jlong>(obj->setXfermode(xfermode)); } static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkPathEffect* effect = reinterpret_cast<SkPathEffect*>(effectHandle); return reinterpret_cast<jlong>(obj->setPathEffect(effect)); } static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkMaskFilter* maskfilter = reinterpret_cast<SkMaskFilter*>(maskfilterHandle); return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter)); } static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) { // TODO: in Paint refactoring, set typeface on android Paint, not Paint return NULL; } static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle)); return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer)); } static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); return static_cast<jint>(obj->getTextAlign()); } static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) { Paint* obj = reinterpret_cast<Paint*>(objHandle); Paint::Align align = static_cast<Paint::Align>(alignHandle); obj->setTextAlign(align); } static jint setTextLocales(JNIEnv* env, jobject clazz, jlong objHandle, jstring locales) { Paint* obj = reinterpret_cast<Paint*>(objHandle); ScopedUtfChars localesChars(env, locales); jint minikinLangListId = FontStyle::registerLanguageList(localesChars.c_str()); obj->setMinikinLangListId(minikinLangListId); return minikinLangListId; } static void setTextLocalesByMinikinLangListId(JNIEnv* env, jobject clazz, jlong objHandle, jint minikinLangListId) { Paint* obj = reinterpret_cast<Paint*>(objHandle); obj->setMinikinLangListId(minikinLangListId); } static jboolean isElegantTextHeight(JNIEnv* env, jobject, jlong paintHandle) { Paint* obj = reinterpret_cast<Paint*>(paintHandle); return obj->getFontVariant() == VARIANT_ELEGANT; } static void setElegantTextHeight(JNIEnv* env, jobject, jlong paintHandle, jboolean aa) { Paint* obj = reinterpret_cast<Paint*>(paintHandle); obj->setFontVariant(aa ? VARIANT_ELEGANT : VARIANT_DEFAULT); } static jfloat getTextSize(JNIEnv* env, jobject, jlong paintHandle) { return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getTextSize()); } static void setTextSize(JNIEnv* env, jobject, jlong paintHandle, jfloat textSize) { reinterpret_cast<Paint*>(paintHandle)->setTextSize(textSize); } static jfloat getTextScaleX(JNIEnv* env, jobject, jlong paintHandle) { return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getTextScaleX()); } static void setTextScaleX(JNIEnv* env, jobject, jlong paintHandle, jfloat scaleX) { reinterpret_cast<Paint*>(paintHandle)->setTextScaleX(scaleX); } static jfloat getTextSkewX(JNIEnv* env, jobject, jlong paintHandle) { return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getTextSkewX()); } static void setTextSkewX(JNIEnv* env, jobject, jlong paintHandle, jfloat skewX) { reinterpret_cast<Paint*>(paintHandle)->setTextSkewX(skewX); } static jfloat getLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); return paint->getLetterSpacing(); } static void setLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat letterSpacing) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); paint->setLetterSpacing(letterSpacing); } static void setFontFeatureSettings(JNIEnv* env, jobject clazz, jlong paintHandle, jstring settings) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); if (!settings) { paint->setFontFeatureSettings(std::string()); } else { ScopedUtfChars settingsChars(env, settings); paint->setFontFeatureSettings(std::string(settingsChars.c_str(), settingsChars.size())); } } static jint getHyphenEdit(JNIEnv* env, jobject clazz, jlong paintHandle, jint hyphen) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); return paint->getHyphenEdit(); } static void setHyphenEdit(JNIEnv* env, jobject clazz, jlong paintHandle, jint hyphen) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); paint->setHyphenEdit((uint32_t)hyphen); } static SkScalar getMetricsInternal(jlong paintHandle, jlong typefaceHandle, Paint::FontMetrics *metrics) { const int kElegantTop = 2500; const int kElegantBottom = -1000; const int kElegantAscent = 1900; const int kElegantDescent = -500; const int kElegantLeading = 0; Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); typeface = Typeface::resolveDefault(typeface); FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle); float saveSkewX = paint->getTextSkewX(); bool savefakeBold = paint->isFakeBoldText(); MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery); SkScalar spacing = paint->getFontMetrics(metrics); // The populateSkPaint call may have changed fake bold / text skew // because we want to measure with those effects applied, so now // restore the original settings. paint->setTextSkewX(saveSkewX); paint->setFakeBoldText(savefakeBold); if (paint->getFontVariant() == VARIANT_ELEGANT) { SkScalar size = paint->getTextSize(); metrics->fTop = -size * kElegantTop / 2048; metrics->fBottom = -size * kElegantBottom / 2048; metrics->fAscent = -size * kElegantAscent / 2048; metrics->fDescent = -size * kElegantDescent / 2048; metrics->fLeading = size * kElegantLeading / 2048; spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading; } return spacing; } static jfloat ascent(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle) { Paint::FontMetrics metrics; getMetricsInternal(paintHandle, typefaceHandle, &metrics); return SkScalarToFloat(metrics.fAscent); } static jfloat descent(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle) { Paint::FontMetrics metrics; getMetricsInternal(paintHandle, typefaceHandle, &metrics); return SkScalarToFloat(metrics.fDescent); } static jfloat getFontMetrics(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, jobject metricsObj) { Paint::FontMetrics metrics; SkScalar spacing = getMetricsInternal(paintHandle, typefaceHandle, &metrics); if (metricsObj) { SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); } return SkScalarToFloat(spacing); } static jint getFontMetricsInt(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, jobject metricsObj) { Paint::FontMetrics metrics; getMetricsInternal(paintHandle, typefaceHandle, &metrics); int ascent = SkScalarRoundToInt(metrics.fAscent); int descent = SkScalarRoundToInt(metrics.fDescent); int leading = SkScalarRoundToInt(metrics.fLeading); if (metricsObj) { SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop)); env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom)); env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); } return descent - ascent + leading; } static jfloat doTextAdvances(JNIEnv *env, Paint *paint, Typeface* typeface, const jchar *text, jint start, jint count, jint contextCount, jint bidiFlags, jfloatArray advances, jint advancesIndex) { NPE_CHECK_RETURN_ZERO(env, text); if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { doThrowAIOOBE(env); return 0; } if (count == 0) { return 0; } if (advances) { size_t advancesLength = env->GetArrayLength(advances); if ((size_t)(count + advancesIndex) > advancesLength) { doThrowAIOOBE(env); return 0; } } std::unique_ptr<jfloat[]> advancesArray; if (advances) { advancesArray.reset(new jfloat[count]); } const float advance = MinikinUtils::measureText(paint, bidiFlags, typeface, text, start, count, contextCount, advancesArray.get()); if (advances) { env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray.get()); } return advance; } static jfloat getTextAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, jint bidiFlags, jfloatArray advances, jint advancesIndex) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); jchar* textArray = env->GetCharArrayElements(text, NULL); jfloat result = doTextAdvances(env, paint, typeface, textArray + contextIndex, index - contextIndex, count, contextCount, bidiFlags, advances, advancesIndex); env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); return result; } static jfloat getTextAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint bidiFlags, jfloatArray advances, jint advancesIndex) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); const jchar* textArray = env->GetStringChars(text, NULL); jfloat result = doTextAdvances(env, paint, typeface, textArray + contextStart, start - contextStart, end - start, contextEnd - contextStart, bidiFlags, advances, advancesIndex); env->ReleaseStringChars(text, textArray); return result; } static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start, jint count, jint flags, jint offset, jint opt) { GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt); size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt); return static_cast<jint>(result); } static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text, jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); jchar* textArray = env->GetCharArrayElements(text, NULL); jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir, offset, cursorOpt); env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); return result; } static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text, jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); const jchar* textArray = env->GetStringChars(text, NULL); jint result = doTextRunCursor(env, paint, textArray, contextStart, contextEnd - contextStart, dir, offset, cursorOpt); env->ReleaseStringChars(text, textArray); return result; } class GetTextFunctor { public: GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint, uint16_t* glyphs, SkPoint* pos) : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) { } void operator()(size_t start, size_t end) { for (size_t i = start; i < end; i++) { glyphs[i] = layout.getGlyphId(i); pos[i].fX = x + layout.getX(i); pos[i].fY = y + layout.getY(i); } if (start == 0) { paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path); } else { paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath); path->addPath(tmpPath); } } private: const Layout& layout; SkPath* path; jfloat x; jfloat y; Paint* paint; uint16_t* glyphs; SkPoint* pos; SkPath tmpPath; }; static void getTextPath(JNIEnv* env, Paint* paint, Typeface* typeface, const jchar* text, jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) { Layout layout; MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count); size_t nGlyphs = layout.nGlyphs(); uint16_t* glyphs = new uint16_t[nGlyphs]; SkPoint* pos = new SkPoint[nGlyphs]; x += MinikinUtils::xOffsetForTextAlign(paint, layout); Paint::Align align = paint->getTextAlign(); paint->setTextAlign(Paint::kLeft_Align); paint->setTextEncoding(Paint::kGlyphID_TextEncoding); GetTextFunctor f(layout, path, x, y, paint, glyphs, pos); MinikinUtils::forFontRun(layout, paint, f); paint->setTextAlign(align); delete[] glyphs; delete[] pos; } static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jint bidiFlags, jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); SkPath* path = reinterpret_cast<SkPath*>(pathHandle); const jchar* textArray = env->GetCharArrayElements(text, NULL); getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path); env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); } static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jint bidiFlags, jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); SkPath* path = reinterpret_cast<SkPath*>(pathHandle); const jchar* textArray = env->GetStringChars(text, NULL); getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path); env->ReleaseStringChars(text, textArray); } static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius, jfloat dx, jfloat dy, jint color) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); if (radius <= 0) { paint->setLooper(NULL); } else { SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius); paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref(); } } static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) { Paint* paint = reinterpret_cast<Paint*>(paintHandle); return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL); } static int breakText(JNIEnv* env, const Paint& paint, Typeface* typeface, const jchar text[], int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, const bool forwardScan) { size_t measuredCount = 0; float measured = 0; std::unique_ptr<float[]> advancesArray(new float[count]); MinikinUtils::measureText(&paint, bidiFlags, typeface, text, 0, count, count, advancesArray.get()); for (int i = 0; i < count; i++) { // traverse in the given direction int index = forwardScan ? i : (count - i - 1); float width = advancesArray[index]; if (measured + width > maxWidth) { break; } // properly handle clusters when scanning backwards if (forwardScan || width != 0.0f) { measuredCount = i + 1; } measured += width; } if (jmeasured && env->GetArrayLength(jmeasured) > 0) { AutoJavaFloatArray autoMeasured(env, jmeasured, 1); jfloat* array = autoMeasured.ptr(); array[0] = measured; } return measuredCount; } static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext, jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { NPE_CHECK_RETURN_ZERO(env, jtext); Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); bool forwardTextDirection; if (count < 0) { forwardTextDirection = false; count = -count; } else { forwardTextDirection = true; } if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { doThrowAIOOBE(env); return 0; } const jchar* text = env->GetCharArrayElements(jtext, NULL); count = breakText(env, *paint, typeface, text + index, count, maxWidth, bidiFlags, jmeasuredWidth, forwardTextDirection); env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), JNI_ABORT); return count; } static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext, jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { NPE_CHECK_RETURN_ZERO(env, jtext); Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); int count = env->GetStringLength(jtext); const jchar* text = env->GetStringChars(jtext, NULL); count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, forwards); env->ReleaseStringChars(jtext, text); return count; } static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds, const Paint& paint, Typeface* typeface, jint bidiFlags) { SkRect r; SkIRect ir; Layout layout; MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count); MinikinRect rect; layout.getBounds(&rect); r.fLeft = rect.mLeft; r.fTop = rect.mTop; r.fRight = rect.mRight; r.fBottom = rect.mBottom; r.roundOut(&ir); GraphicsJNI::irect_to_jrect(ir, env, bounds); } static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, jstring text, jint start, jint end, jint bidiFlags, jobject bounds) { const Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); const jchar* textArray = env->GetStringChars(text, NULL); doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags); env->ReleaseStringChars(text, textArray); } static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) { const Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); const jchar* textArray = env->GetCharArrayElements(text, NULL); doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags); env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); } static jboolean layoutContainsNotdef(const Layout& layout) { for (size_t i = 0; i < layout.nGlyphs(); i++) { if (layout.getGlyphId(i) == 0) { return true; } } return false; } // Returns true if the given string is exact one pair of regional indicators. static bool isFlag(const jchar* str, size_t length) { const jchar RI_LEAD_SURROGATE = 0xD83C; const jchar RI_TRAIL_SURROGATE_MIN = 0xDDE6; const jchar RI_TRAIL_SURROGATE_MAX = 0xDDFF; if (length != 4) { return false; } if (str[0] != RI_LEAD_SURROGATE || str[2] != RI_LEAD_SURROGATE) { return false; } return RI_TRAIL_SURROGATE_MIN <= str[1] && str[1] <= RI_TRAIL_SURROGATE_MAX && RI_TRAIL_SURROGATE_MIN <= str[3] && str[3] <= RI_TRAIL_SURROGATE_MAX; } static jboolean hasGlyph(JNIEnv *env, jclass, jlong paintHandle, jlong typefaceHandle, jint bidiFlags, jstring string) { const Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); ScopedStringChars str(env, string); /* Start by rejecting unsupported base code point and variation selector pairs. */ size_t nChars = 0; const uint32_t kStartOfString = 0xFFFFFFFF; uint32_t prevCp = kStartOfString; for (size_t i = 0; i < str.size(); i++) { jchar cu = str[i]; uint32_t cp = cu; if (U16_IS_TRAIL(cu)) { // invalid UTF-16, unpaired trailing surrogate return false; } else if (U16_IS_LEAD(cu)) { if (i + 1 == str.size()) { // invalid UTF-16, unpaired leading surrogate at end of string return false; } i++; jchar cu2 = str[i]; if (!U16_IS_TRAIL(cu2)) { // invalid UTF-16, unpaired leading surrogate return false; } cp = U16_GET_SUPPLEMENTARY(cu, cu2); } if (prevCp != kStartOfString && ((0xFE00 <= cp && cp <= 0xFE0F) || (0xE0100 <= cp && cp <= 0xE01EF))) { bool hasVS = MinikinUtils::hasVariationSelector(typeface, prevCp, cp); if (!hasVS) { // No font has a glyph for the code point and variation selector pair. return false; } else if (nChars == 1 && i + 1 == str.size()) { // The string is just a codepoint and a VS, we have an authoritative answer return true; } } nChars++; prevCp = cp; } Layout layout; MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, str.get(), 0, str.size(), str.size()); size_t nGlyphs = layout.nGlyphs(); if (nGlyphs != 1 && nChars > 1) { // multiple-character input, and was not a ligature // TODO: handle ZWJ/ZWNJ characters specially so we can detect certain ligatures // in joining scripts, such as Arabic and Mongolian. return false; } if (nGlyphs == 0 || layoutContainsNotdef(layout)) { return false; // The collection doesn't have a glyph. } if (nChars == 2 && isFlag(str.get(), str.size())) { // Some font may have a special glyph for unsupported regional indicator pairs. // To return false for this case, need to compare the glyph id with the one of ZZ // since ZZ is reserved for unknown or invalid territory. // U+1F1FF (REGIONAL INDICATOR SYMBOL LETTER Z) is \uD83C\uDDFF in UTF16. static const jchar ZZ_FLAG_STR[] = { 0xD83C, 0xDDFF, 0xD83C, 0xDDFF }; Layout zzLayout; MinikinUtils::doLayout(&zzLayout, paint, bidiFlags, typeface, ZZ_FLAG_STR, 0, 4, 4); if (zzLayout.nGlyphs() != 1 || layoutContainsNotdef(zzLayout)) { // The font collection doesn't have a glyph for unknown flag. Just return true. return true; } return zzLayout.getGlyphId(0) != layout.getGlyphId(0); } return true; } static jfloat doRunAdvance(const Paint* paint, Typeface* typeface, const jchar buf[], jint start, jint count, jint bufSize, jboolean isRtl, jint offset) { int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR; if (offset == start + count) { return MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count, bufSize, nullptr); } std::unique_ptr<float[]> advancesArray(new float[count]); MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count, bufSize, advancesArray.get()); return getRunAdvance(advancesArray.get(), buf, start, count, offset); } static jfloat getRunAdvance___CIIIIZI_F(JNIEnv *env, jclass, jlong paintHandle, jlong typefaceHandle, jcharArray text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl, jint offset) { const Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); jchar* textArray = (jchar*) env->GetPrimitiveArrayCritical(text, NULL); jfloat result = doRunAdvance(paint, typeface, textArray + contextStart, start - contextStart, end - start, contextEnd - contextStart, isRtl, offset - contextStart); env->ReleasePrimitiveArrayCritical(text, textArray, JNI_ABORT); return result; } static jint doOffsetForAdvance(const Paint* paint, Typeface* typeface, const jchar buf[], jint start, jint count, jint bufSize, jboolean isRtl, jfloat advance) { int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR; std::unique_ptr<float[]> advancesArray(new float[count]); MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count, bufSize, advancesArray.get()); return getOffsetForAdvance(advancesArray.get(), buf, start, count, advance); } static jint getOffsetForAdvance___CIIIIZF_I(JNIEnv *env, jclass, jlong paintHandle, jlong typefaceHandle, jcharArray text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl, jfloat advance) { const Paint* paint = reinterpret_cast<Paint*>(paintHandle); Typeface* typeface = reinterpret_cast<Typeface*>(typefaceHandle); jchar* textArray = (jchar*) env->GetPrimitiveArrayCritical(text, NULL); jint result = doOffsetForAdvance(paint, typeface, textArray + contextStart, start - contextStart, end - start, contextEnd - contextStart, isRtl, advance); result += contextStart; env->ReleasePrimitiveArrayCritical(text, textArray, JNI_ABORT); return result; } }; // namespace PaintGlue static const JNINativeMethod methods[] = { {"nGetNativeFinalizer", "()J", (void*) PaintGlue::getNativeFinalizer}, {"nInit","()J", (void*) PaintGlue::init}, {"nInitWithPaint","(J)J", (void*) PaintGlue::initWithPaint}, {"nReset","!(J)V", (void*) PaintGlue::reset}, {"nSet","!(JJ)V", (void*) PaintGlue::assign}, {"nGetFlags","!(J)I", (void*) PaintGlue::getFlags}, {"nSetFlags","!(JI)V", (void*) PaintGlue::setFlags}, {"nGetHinting","!(J)I", (void*) PaintGlue::getHinting}, {"nSetHinting","!(JI)V", (void*) PaintGlue::setHinting}, {"nSetAntiAlias","!(JZ)V", (void*) PaintGlue::setAntiAlias}, {"nSetSubpixelText","!(JZ)V", (void*) PaintGlue::setSubpixelText}, {"nSetLinearText","!(JZ)V", (void*) PaintGlue::setLinearText}, {"nSetUnderlineText","!(JZ)V", (void*) PaintGlue::setUnderlineText}, {"nSetStrikeThruText","!(JZ)V", (void*) PaintGlue::setStrikeThruText}, {"nSetFakeBoldText","!(JZ)V", (void*) PaintGlue::setFakeBoldText}, {"nSetFilterBitmap","!(JZ)V", (void*) PaintGlue::setFilterBitmap}, {"nSetDither","!(JZ)V", (void*) PaintGlue::setDither}, {"nGetStyle","!(J)I", (void*) PaintGlue::getStyle}, {"nSetStyle","!(JI)V", (void*) PaintGlue::setStyle}, {"nGetColor","!(J)I", (void*) PaintGlue::getColor}, {"nSetColor","!(JI)V", (void*) PaintGlue::setColor}, {"nGetAlpha","!(J)I", (void*) PaintGlue::getAlpha}, {"nSetAlpha","!(JI)V", (void*) PaintGlue::setAlpha}, {"nGetStrokeWidth","!(J)F", (void*) PaintGlue::getStrokeWidth}, {"nSetStrokeWidth","!(JF)V", (void*) PaintGlue::setStrokeWidth}, {"nGetStrokeMiter","!(J)F", (void*) PaintGlue::getStrokeMiter}, {"nSetStrokeMiter","!(JF)V", (void*) PaintGlue::setStrokeMiter}, {"nGetStrokeCap","!(J)I", (void*) PaintGlue::getStrokeCap}, {"nSetStrokeCap","!(JI)V", (void*) PaintGlue::setStrokeCap}, {"nGetStrokeJoin","!(J)I", (void*) PaintGlue::getStrokeJoin}, {"nSetStrokeJoin","!(JI)V", (void*) PaintGlue::setStrokeJoin}, {"nGetFillPath","!(JJJ)Z", (void*) PaintGlue::getFillPath}, {"nSetShader","!(JJ)J", (void*) PaintGlue::setShader}, {"nSetColorFilter","!(JJ)J", (void*) PaintGlue::setColorFilter}, {"nSetXfermode","!(JJ)J", (void*) PaintGlue::setXfermode}, {"nSetPathEffect","!(JJ)J", (void*) PaintGlue::setPathEffect}, {"nSetMaskFilter","!(JJ)J", (void*) PaintGlue::setMaskFilter}, {"nSetTypeface","!(JJ)J", (void*) PaintGlue::setTypeface}, {"nSetRasterizer","!(JJ)J", (void*) PaintGlue::setRasterizer}, {"nGetTextAlign","!(J)I", (void*) PaintGlue::getTextAlign}, {"nSetTextAlign","!(JI)V", (void*) PaintGlue::setTextAlign}, {"nSetTextLocales","!(JLjava/lang/String;)I", (void*) PaintGlue::setTextLocales}, {"nSetTextLocalesByMinikinLangListId","!(JI)V", (void*) PaintGlue::setTextLocalesByMinikinLangListId}, {"nIsElegantTextHeight","!(J)Z", (void*) PaintGlue::isElegantTextHeight}, {"nSetElegantTextHeight","!(JZ)V", (void*) PaintGlue::setElegantTextHeight}, {"nGetTextSize","!(J)F", (void*) PaintGlue::getTextSize}, {"nSetTextSize","!(JF)V", (void*) PaintGlue::setTextSize}, {"nGetTextScaleX","!(J)F", (void*) PaintGlue::getTextScaleX}, {"nSetTextScaleX","!(JF)V", (void*) PaintGlue::setTextScaleX}, {"nGetTextSkewX","!(J)F", (void*) PaintGlue::getTextSkewX}, {"nSetTextSkewX","!(JF)V", (void*) PaintGlue::setTextSkewX}, {"nGetLetterSpacing","!(J)F", (void*) PaintGlue::getLetterSpacing}, {"nSetLetterSpacing","!(JF)V", (void*) PaintGlue::setLetterSpacing}, {"nSetFontFeatureSettings","(JLjava/lang/String;)V", (void*) PaintGlue::setFontFeatureSettings}, {"nGetHyphenEdit", "!(J)I", (void*) PaintGlue::getHyphenEdit}, {"nSetHyphenEdit", "!(JI)V", (void*) PaintGlue::setHyphenEdit}, {"nAscent","!(JJ)F", (void*) PaintGlue::ascent}, {"nDescent","!(JJ)F", (void*) PaintGlue::descent}, {"nGetFontMetrics", "!(JJLandroid/graphics/Paint$FontMetrics;)F", (void*)PaintGlue::getFontMetrics}, {"nGetFontMetricsInt", "!(JJLandroid/graphics/Paint$FontMetricsInt;)I", (void*)PaintGlue::getFontMetricsInt}, {"nBreakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC}, {"nBreakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS}, {"nGetTextAdvances","(JJ[CIIIII[FI)F", (void*) PaintGlue::getTextAdvances___CIIIII_FI}, {"nGetTextAdvances","(JJLjava/lang/String;IIIII[FI)F", (void*) PaintGlue::getTextAdvances__StringIIIII_FI}, {"nGetTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C}, {"nGetTextRunCursor", "(JLjava/lang/String;IIIII)I", (void*) PaintGlue::getTextRunCursor__String}, {"nGetTextPath", "(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C}, {"nGetTextPath", "(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String}, {"nGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V", (void*) PaintGlue::getStringBounds }, {"nGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V", (void*) PaintGlue::getCharArrayBounds }, {"nHasGlyph", "(JJILjava/lang/String;)Z", (void*) PaintGlue::hasGlyph }, {"nGetRunAdvance", "(JJ[CIIIIZI)F", (void*) PaintGlue::getRunAdvance___CIIIIZI_F}, {"nGetOffsetForAdvance", "(JJ[CIIIIZF)I", (void*) PaintGlue::getOffsetForAdvance___CIIIIZF_I}, {"nSetShadowLayer", "!(JFFFI)V", (void*)PaintGlue::setShadowLayer}, {"nHasShadowLayer", "!(J)Z", (void*)PaintGlue::hasShadowLayer} }; int register_android_graphics_Paint(JNIEnv* env) { gFontMetrics_class = FindClassOrDie(env, "android/graphics/Paint$FontMetrics"); gFontMetrics_class = MakeGlobalRefOrDie(env, gFontMetrics_class); gFontMetrics_fieldID.top = GetFieldIDOrDie(env, gFontMetrics_class, "top", "F"); gFontMetrics_fieldID.ascent = GetFieldIDOrDie(env, gFontMetrics_class, "ascent", "F"); gFontMetrics_fieldID.descent = GetFieldIDOrDie(env, gFontMetrics_class, "descent", "F"); gFontMetrics_fieldID.bottom = GetFieldIDOrDie(env, gFontMetrics_class, "bottom", "F"); gFontMetrics_fieldID.leading = GetFieldIDOrDie(env, gFontMetrics_class, "leading", "F"); gFontMetricsInt_class = FindClassOrDie(env, "android/graphics/Paint$FontMetricsInt"); gFontMetricsInt_class = MakeGlobalRefOrDie(env, gFontMetricsInt_class); gFontMetricsInt_fieldID.top = GetFieldIDOrDie(env, gFontMetricsInt_class, "top", "I"); gFontMetricsInt_fieldID.ascent = GetFieldIDOrDie(env, gFontMetricsInt_class, "ascent", "I"); gFontMetricsInt_fieldID.descent = GetFieldIDOrDie(env, gFontMetricsInt_class, "descent", "I"); gFontMetricsInt_fieldID.bottom = GetFieldIDOrDie(env, gFontMetricsInt_class, "bottom", "I"); gFontMetricsInt_fieldID.leading = GetFieldIDOrDie(env, gFontMetricsInt_class, "leading", "I"); return RegisterMethodsOrDie(env, "android/graphics/Paint", methods, NELEM(methods)); } }