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/*
* Copyright (C) 2017 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 "MeasuredText"
#include "GraphicsJNI.h"
#include "utils/misc.h"
#include "utils/Log.h"
#include <nativehelper/ScopedStringChars.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <nativehelper/JNIHelp.h>
#include "core_jni_helpers.h"
#include <cstdint>
#include <vector>
#include <list>
#include <algorithm>
#include "SkPaint.h"
#include "SkTypeface.h"
#include <hwui/MinikinSkia.h>
#include <hwui/MinikinUtils.h>
#include <hwui/Paint.h>
#include <minikin/FontCollection.h>
#include <minikin/AndroidLineBreakerHelper.h>
#include <minikin/MinikinFont.h>
namespace android {
static inline minikin::MeasuredTextBuilder* toBuilder(jlong ptr) {
return reinterpret_cast<minikin::MeasuredTextBuilder*>(ptr);
}
static inline Paint* toPaint(jlong ptr) {
return reinterpret_cast<Paint*>(ptr);
}
static inline minikin::MeasuredText* toMeasuredParagraph(jlong ptr) {
return reinterpret_cast<minikin::MeasuredText*>(ptr);
}
template<typename Ptr> static inline jlong toJLong(Ptr ptr) {
return reinterpret_cast<jlong>(ptr);
}
static void releaseMeasuredParagraph(jlong measuredTextPtr) {
delete toMeasuredParagraph(measuredTextPtr);
}
// Regular JNI
static jlong nInitBuilder() {
return toJLong(new minikin::MeasuredTextBuilder());
}
// Regular JNI
static void nAddStyleRun(JNIEnv* /* unused */, jclass /* unused */, jlong builderPtr,
jlong paintPtr, jint start, jint end, jboolean isRtl) {
Paint* paint = toPaint(paintPtr);
const Typeface* typeface = Typeface::resolveDefault(paint->getAndroidTypeface());
minikin::MinikinPaint minikinPaint = MinikinUtils::prepareMinikinPaint(paint, typeface);
toBuilder(builderPtr)->addStyleRun(start, end, std::move(minikinPaint), isRtl);
}
// Regular JNI
static void nAddReplacementRun(JNIEnv* /* unused */, jclass /* unused */, jlong builderPtr,
jlong paintPtr, jint start, jint end, jfloat width) {
toBuilder(builderPtr)->addReplacementRun(start, end, width,
toPaint(paintPtr)->getMinikinLocaleListId());
}
// Regular JNI
static jlong nBuildMeasuredText(JNIEnv* env, jclass /* unused */, jlong builderPtr,
jlong hintPtr, jcharArray javaText, jboolean computeHyphenation,
jboolean computeLayout) {
ScopedCharArrayRO text(env, javaText);
const minikin::U16StringPiece textBuffer(text.get(), text.size());
// Pass the ownership to Java.
return toJLong(toBuilder(builderPtr)->build(textBuffer, computeHyphenation, computeLayout,
toMeasuredParagraph(hintPtr)).release());
}
// Regular JNI
static void nFreeBuilder(JNIEnv* env, jclass /* unused */, jlong builderPtr) {
delete toBuilder(builderPtr);
}
// CriticalNative
static jfloat nGetWidth(jlong ptr, jint start, jint end) {
minikin::MeasuredText* mt = toMeasuredParagraph(ptr);
float r = 0.0f;
for (int i = start; i < end; ++i) {
r += mt->widths[i];
}
return r;
}
static jfloat nGetCharWidthAt(jlong ptr, jint offset) {
return toMeasuredParagraph(ptr)->widths[offset];
}
// Regular JNI
static void nGetBounds(JNIEnv* env, jobject, jlong ptr, jcharArray javaText, jint start, jint end,
jobject bounds) {
ScopedCharArrayRO text(env, javaText);
const minikin::U16StringPiece textBuffer(text.get(), text.size());
const minikin::Range range(start, end);
minikin::MinikinRect rect = toMeasuredParagraph(ptr)->getBounds(textBuffer, range);
SkRect r;
r.fLeft = rect.mLeft;
r.fTop = rect.mTop;
r.fRight = rect.mRight;
r.fBottom = rect.mBottom;
SkIRect ir;
r.roundOut(&ir);
GraphicsJNI::irect_to_jrect(ir, env, bounds);
}
// CriticalNative
static jlong nGetReleaseFunc() {
return toJLong(&releaseMeasuredParagraph);
}
static jint nGetMemoryUsage(jlong ptr) {
return static_cast<jint>(toMeasuredParagraph(ptr)->getMemoryUsage());
}
static const JNINativeMethod gMTBuilderMethods[] = {
// MeasuredParagraphBuilder native functions.
{"nInitBuilder", "()J", (void*) nInitBuilder},
{"nAddStyleRun", "(JJIIZ)V", (void*) nAddStyleRun},
{"nAddReplacementRun", "(JJIIF)V", (void*) nAddReplacementRun},
{"nBuildMeasuredText", "(JJ[CZZ)J", (void*) nBuildMeasuredText},
{"nFreeBuilder", "(J)V", (void*) nFreeBuilder},
};
static const JNINativeMethod gMTMethods[] = {
// MeasuredParagraph native functions.
{"nGetWidth", "(JII)F", (void*) nGetWidth}, // Critical Natives
{"nGetBounds", "(J[CIILandroid/graphics/Rect;)V", (void*) nGetBounds}, // Regular JNI
{"nGetReleaseFunc", "()J", (void*) nGetReleaseFunc}, // Critical Natives
{"nGetMemoryUsage", "(J)I", (void*) nGetMemoryUsage}, // Critical Native
{"nGetCharWidthAt", "(JI)F", (void*) nGetCharWidthAt}, // Critical Native
};
int register_android_graphics_text_MeasuredText(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/graphics/text/MeasuredText",
gMTMethods, NELEM(gMTMethods))
+ RegisterMethodsOrDie(env, "android/graphics/text/MeasuredText$Builder",
gMTBuilderMethods, NELEM(gMTBuilderMethods));
}
}
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