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/*
* Copyright (C) 2020 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.
*/
#undef LOG_TAG
#define LOG_TAG "TextShaper"
#include "graphics_jni_helpers.h"
#include <nativehelper/ScopedStringChars.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <set>
#include <algorithm>
#include <hwui/MinikinSkia.h>
#include <hwui/MinikinUtils.h>
#include <hwui/Paint.h>
#include <minikin/MinikinFont.h>
#include <minikin/MinikinPaint.h>
#include "FontUtils.h"
#include "SkPaint.h"
#include "SkTypeface.h"
namespace android {
struct LayoutWrapper {
LayoutWrapper(minikin::Layout&& layout, float ascent, float descent)
: layout(std::move(layout)), ascent(ascent), descent(descent) {}
minikin::Layout layout;
float ascent;
float descent;
};
static void releaseLayout(jlong ptr) {
delete reinterpret_cast<LayoutWrapper*>(ptr);
}
static jlong shapeTextRun(const uint16_t* text, int textSize, int start, int count,
int contextStart, int contextCount, minikin::Bidi bidiFlags,
const Paint& paint, const Typeface* typeface) {
minikin::MinikinPaint minikinPaint = MinikinUtils::prepareMinikinPaint(&paint, typeface);
minikin::Layout layout = MinikinUtils::doLayout(&paint, bidiFlags, typeface,
text, textSize, start, count, contextStart, contextCount, nullptr);
std::set<const minikin::Font*> seenFonts;
float overallAscent = 0;
float overallDescent = 0;
for (int i = 0; i < layout.nGlyphs(); ++i) {
const minikin::Font* font = layout.getFont(i);
if (seenFonts.find(font) != seenFonts.end()) continue;
minikin::MinikinExtent extent = {};
font->typeface()->GetFontExtent(&extent, minikinPaint, layout.getFakery(i));
overallAscent = std::min(overallAscent, extent.ascent);
overallDescent = std::max(overallDescent, extent.descent);
}
std::unique_ptr<LayoutWrapper> ptr = std::make_unique<LayoutWrapper>(
std::move(layout), overallAscent, overallDescent
);
return reinterpret_cast<jlong>(ptr.release());
}
static jlong TextShaper_shapeTextRunChars(JNIEnv *env, jobject, jcharArray charArray,
jint start, jint count, jint contextStart, jint contextCount, jboolean isRtl,
jlong paintPtr) {
ScopedCharArrayRO text(env, charArray);
Paint* paint = reinterpret_cast<Paint*>(paintPtr);
const Typeface* typeface = paint->getAndroidTypeface();
const minikin::Bidi bidiFlags = isRtl ? minikin::Bidi::FORCE_RTL : minikin::Bidi::FORCE_LTR;
return shapeTextRun(
text.get(), text.size(),
start, count,
contextStart, contextCount,
bidiFlags,
*paint, typeface);
}
static jlong TextShaper_shapeTextRunString(JNIEnv *env, jobject, jstring string,
jint start, jint count, jint contextStart, jint contextCount, jboolean isRtl,
jlong paintPtr) {
ScopedStringChars text(env, string);
Paint* paint = reinterpret_cast<Paint*>(paintPtr);
const Typeface* typeface = paint->getAndroidTypeface();
const minikin::Bidi bidiFlags = isRtl ? minikin::Bidi::FORCE_RTL : minikin::Bidi::FORCE_LTR;
return shapeTextRun(
text.get(), text.size(),
start, count,
contextStart, contextCount,
bidiFlags,
*paint, typeface);
}
// CriticalNative
static jint TextShaper_Result_getGlyphCount(CRITICAL_JNI_PARAMS_COMMA jlong ptr) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->layout.nGlyphs();
}
// CriticalNative
static jfloat TextShaper_Result_getTotalAdvance(CRITICAL_JNI_PARAMS_COMMA jlong ptr) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->layout.getAdvance();
}
// CriticalNative
static jfloat TextShaper_Result_getAscent(CRITICAL_JNI_PARAMS_COMMA jlong ptr) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->ascent;
}
// CriticalNative
static jfloat TextShaper_Result_getDescent(CRITICAL_JNI_PARAMS_COMMA jlong ptr) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->descent;
}
// CriticalNative
static jint TextShaper_Result_getGlyphId(CRITICAL_JNI_PARAMS_COMMA jlong ptr, jint i) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->layout.getGlyphId(i);
}
// CriticalNative
static jfloat TextShaper_Result_getX(CRITICAL_JNI_PARAMS_COMMA jlong ptr, jint i) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->layout.getX(i);
}
// CriticalNative
static jfloat TextShaper_Result_getY(CRITICAL_JNI_PARAMS_COMMA jlong ptr, jint i) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
return layout->layout.getY(i);
}
// CriticalNative
static jlong TextShaper_Result_getFont(CRITICAL_JNI_PARAMS_COMMA jlong ptr, jint i) {
const LayoutWrapper* layout = reinterpret_cast<LayoutWrapper*>(ptr);
std::shared_ptr<minikin::Font> fontRef = layout->layout.getFontRef(i);
return reinterpret_cast<jlong>(new FontWrapper(std::move(fontRef)));
}
// CriticalNative
static jlong TextShaper_Result_nReleaseFunc(CRITICAL_JNI_PARAMS) {
return reinterpret_cast<jlong>(releaseLayout);
}
static const JNINativeMethod gMethods[] = {
{"nativeShapeTextRun", "("
"[C" // text
"I" // start
"I" // count
"I" // contextStart
"I" // contextCount
"Z" // isRtl
"J)" // paint
"J", // LayoutPtr
(void*) TextShaper_shapeTextRunChars},
{"nativeShapeTextRun", "("
"Ljava/lang/String;" // text
"I" // start
"I" // count
"I" // contextStart
"I" // contextCount
"Z" // isRtl
"J)" // paint
"J", // LayoutPtr
(void*) TextShaper_shapeTextRunString},
};
static const JNINativeMethod gResultMethods[] = {
{ "nGetGlyphCount", "(J)I", (void*)TextShaper_Result_getGlyphCount },
{ "nGetTotalAdvance", "(J)F", (void*)TextShaper_Result_getTotalAdvance },
{ "nGetAscent", "(J)F", (void*)TextShaper_Result_getAscent },
{ "nGetDescent", "(J)F", (void*)TextShaper_Result_getDescent },
{ "nGetGlyphId", "(JI)I", (void*)TextShaper_Result_getGlyphId },
{ "nGetX", "(JI)F", (void*)TextShaper_Result_getX },
{ "nGetY", "(JI)F", (void*)TextShaper_Result_getY },
{ "nGetFont", "(JI)J", (void*)TextShaper_Result_getFont },
{ "nReleaseFunc", "()J", (void*)TextShaper_Result_nReleaseFunc },
};
int register_android_graphics_text_TextShaper(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/graphics/text/TextRunShaper", gMethods,
NELEM(gMethods))
+ RegisterMethodsOrDie(env, "android/graphics/text/PositionedGlyphs",
gResultMethods, NELEM(gResultMethods));
}
}
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