/*

 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "stdlib.h"

#include "string.h"

#include "gdefs.h"

#include "jlong.h"

#include "jni_util.h"

#include "sunfontids.h"

#include "fontscalerdefs.h"

#include "sun_font_SunFontManager.h"

#include "sun_font_NullFontScaler.h"

#include "sun_font_StrikeCache.h"

static void *theNullScalerContext = NULL;

extern void AccelGlyphCache_RemoveAllCellInfos(GlyphInfo *glyph);

/*

 * Declare library specific JNI_Onload entry if static build

 */

DEF_STATIC_JNI_OnLoad

JNIEXPORT jlong JNICALL

Java_sun_font_NullFontScaler_getNullScalerContext

    (JNIEnv *env, jclass scalerClass) {

    if (theNullScalerContext == NULL) {

        theNullScalerContext = malloc(1);

    }

    return ptr_to_jlong(theNullScalerContext);

}

int isNullScalerContext(void *context) {

    return theNullScalerContext == context;

}

/* Eventually we may rework it to be a singleton.

 * This will require additional checks in freeLongMemory/freeIntMemory

 * and on other hand malformed fonts (main source of null glyph images)

 * are supposed to be collected fast.

 * But perhaps it is still right thing to do.

 * Even better is to eliminate the need to have this native method

 * but for this it is necessary to rework Strike and drawing logic

 * to be able to live with NULL pointers without performance hit.

 */

JNIEXPORT jlong JNICALL Java_sun_font_NullFontScaler_getGlyphImage

  (JNIEnv *env, jobject scaler, jlong pContext, jint glyphCode) {

    void *nullscaler = calloc(sizeof(GlyphInfo), 1);

    return ptr_to_jlong(nullscaler);

}

void initLCDGammaTables();

/* placeholder for extern variable */

static int initialisedFontIDs = 0;

FontManagerNativeIDs sunFontIDs;

static void initFontIDs(JNIEnv *env) {

     jclass tmpClass;

     if (initialisedFontIDs) {

        return;

     }

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/TrueTypeFont"));

     CHECK_NULL(sunFontIDs.ttReadBlockMID =

         (*env)->GetMethodID(env, tmpClass, "readBlock",

                             "(Ljava/nio/ByteBuffer;II)I"));

     CHECK_NULL(sunFontIDs.ttReadBytesMID =

         (*env)->GetMethodID(env, tmpClass, "readBytes", "(II)[B"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/Type1Font"));

     CHECK_NULL(sunFontIDs.readFileMID =

         (*env)->GetMethodID(env, tmpClass,

                             "readFile", "(Ljava/nio/ByteBuffer;)V"));

     CHECK_NULL(tmpClass =

         (*env)->FindClass(env, "java/awt/geom/Point2D$Float"));

     sunFontIDs.pt2DFloatClass = (jclass)(*env)->NewGlobalRef(env, tmpClass);

     CHECK_NULL(sunFontIDs.pt2DFloatCtr =

         (*env)->GetMethodID(env, sunFontIDs.pt2DFloatClass, "<init>","(FF)V"));

     CHECK_NULL(sunFontIDs.xFID =

         (*env)->GetFieldID(env, sunFontIDs.pt2DFloatClass, "x", "F"));

     CHECK_NULL(sunFontIDs.yFID =

         (*env)->GetFieldID(env, sunFontIDs.pt2DFloatClass, "y", "F"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/StrikeMetrics"));

     CHECK_NULL(sunFontIDs.strikeMetricsClass =

         (jclass)(*env)->NewGlobalRef(env, tmpClass));

     CHECK_NULL(sunFontIDs.strikeMetricsCtr =

         (*env)->GetMethodID(env, sunFontIDs.strikeMetricsClass,

                             "<init>", "(FFFFFFFFFF)V"));

     CHECK_NULL(tmpClass =

         (*env)->FindClass(env, "java/awt/geom/Rectangle2D$Float"));

     sunFontIDs.rect2DFloatClass = (jclass)(*env)->NewGlobalRef(env, tmpClass);

     CHECK_NULL(sunFontIDs.rect2DFloatCtr =

         (*env)->GetMethodID(env, sunFontIDs.rect2DFloatClass, "<init>", "()V"));

     CHECK_NULL(sunFontIDs.rect2DFloatCtr4 =

         (*env)->GetMethodID(env, sunFontIDs.rect2DFloatClass,

                            "<init>", "(FFFF)V"));

     CHECK_NULL(sunFontIDs.rectF2DX =

         (*env)->GetFieldID(env, sunFontIDs.rect2DFloatClass, "x", "F"));

     CHECK_NULL(sunFontIDs.rectF2DY =

         (*env)->GetFieldID(env, sunFontIDs.rect2DFloatClass, "y", "F"));

     CHECK_NULL(sunFontIDs.rectF2DWidth =

         (*env)->GetFieldID(env, sunFontIDs.rect2DFloatClass, "width", "F"));

     CHECK_NULL(sunFontIDs.rectF2DHeight =

         (*env)->GetFieldID(env, sunFontIDs.rect2DFloatClass, "height", "F"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "java/awt/geom/GeneralPath"));

     sunFontIDs.gpClass = (jclass)(*env)->NewGlobalRef(env, tmpClass);

     CHECK_NULL(sunFontIDs.gpCtr =

         (*env)->GetMethodID(env, sunFontIDs.gpClass, "<init>", "(I[BI[FI)V"));

     CHECK_NULL(sunFontIDs.gpCtrEmpty =

         (*env)->GetMethodID(env, sunFontIDs.gpClass, "<init>", "()V"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/Font2D"));

     CHECK_NULL(sunFontIDs.f2dCharToGlyphMID =

         (*env)->GetMethodID(env, tmpClass, "charToGlyph", "(I)I"));

     CHECK_NULL(sunFontIDs.f2dCharToVariationGlyphMID =

         (*env)->GetMethodID(env, tmpClass, "charToVariationGlyph", "(II)I"));

     CHECK_NULL(sunFontIDs.getMapperMID =

         (*env)->GetMethodID(env, tmpClass, "getMapper",

                             "()Lsun/font/CharToGlyphMapper;"));

     CHECK_NULL(sunFontIDs.getTableBytesMID =

         (*env)->GetMethodID(env, tmpClass, "getTableBytes", "(I)[B"));

     CHECK_NULL(sunFontIDs.canDisplayMID =

         (*env)->GetMethodID(env, tmpClass, "canDisplay", "(C)Z"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/CharToGlyphMapper"));

     CHECK_NULL(sunFontIDs.charToGlyphMID =

        (*env)->GetMethodID(env, tmpClass, "charToGlyph", "(I)I"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/PhysicalStrike"));

     CHECK_NULL(sunFontIDs.getGlyphMetricsMID =

         (*env)->GetMethodID(env, tmpClass, "getGlyphMetrics",

                             "(I)Ljava/awt/geom/Point2D$Float;"));

     CHECK_NULL(sunFontIDs.getGlyphPointMID =

         (*env)->GetMethodID(env, tmpClass, "getGlyphPoint",

                             "(II)Ljava/awt/geom/Point2D$Float;"));

     CHECK_NULL(sunFontIDs.adjustPointMID =

         (*env)->GetMethodID(env, tmpClass, "adjustPoint",

                             "(Ljava/awt/geom/Point2D$Float;)V"));

     CHECK_NULL(sunFontIDs.pScalerContextFID =

         (*env)->GetFieldID(env, tmpClass, "pScalerContext", "J"));

     CHECK_NULL(tmpClass = (*env)->FindClass(env, "sun/font/GlyphList"));

     CHECK_NULL(sunFontIDs.glyphListX =

         (*env)->GetFieldID(env, tmpClass, "x", "F"));

     CHECK_NULL(sunFontIDs.glyphListY =

         (*env)->GetFieldID(env, tmpClass, "y", "F"));

     CHECK_NULL(sunFontIDs.glyphListLen =

         (*env)->GetFieldID(env, tmpClass, "len", "I"));

     CHECK_NULL(sunFontIDs.glyphImages =

         (*env)->GetFieldID(env, tmpClass, "images", "[J"));

     CHECK_NULL(sunFontIDs.glyphListUsePos =

         (*env)->GetFieldID(env, tmpClass, "usePositions", "Z"));

     CHECK_NULL(sunFontIDs.glyphListPos =

         (*env)->GetFieldID(env, tmpClass, "positions", "[F"));

     CHECK_NULL(sunFontIDs.lcdRGBOrder =

         (*env)->GetFieldID(env, tmpClass, "lcdRGBOrder", "Z"));

     CHECK_NULL(sunFontIDs.lcdSubPixPos =

         (*env)->GetFieldID(env, tmpClass, "lcdSubPixPos", "Z"));

     initLCDGammaTables();

     initialisedFontIDs = 1;

}

JNIEXPORT void JNICALL

Java_sun_font_SunFontManager_initIDs

    (JNIEnv *env, jclass cls) {

    initFontIDs(env);

}

JNIEXPORT FontManagerNativeIDs getSunFontIDs(JNIEnv *env) {

    initFontIDs(env);

    return sunFontIDs;

}

/*

 * Class:     sun_font_StrikeCache

 * Method:    freeIntPointer

 * Signature: (I)V

 */

JNIEXPORT void JNICALL Java_sun_font_StrikeCache_freeIntPointer

    (JNIEnv *env, jclass cacheClass, jint ptr) {

    /* Note this is used for freeing a glyph which was allocated

     * but never placed into the glyph cache. The caller holds the

     * only reference, therefore it is unnecessary to invalidate any

     * accelerated glyph cache cells as we do in freeInt/LongMemory().

     */

    if (ptr != 0) {

        free((void*)((intptr_t)ptr));

    }

}

/*

 * Class:     sun_font_StrikeCache

 * Method:    freeLongPointer

 * Signature: (J)V

 */

JNIEXPORT void JNICALL Java_sun_font_StrikeCache_freeLongPointer

    (JNIEnv *env, jclass cacheClass, jlong ptr) {

    /* Note this is used for freeing a glyph which was allocated

     * but never placed into the glyph cache. The caller holds the

     * only reference, therefore it is unnecessary to invalidate any

     * accelerated glyph cache cells as we do in freeInt/LongMemory().

     */

    if (ptr != 0L) {

        free(jlong_to_ptr(ptr));

    }

}

/*

 * Class:     sun_font_StrikeCache

 * Method:    freeIntMemory

 * Signature: ([I)V

 */

JNIEXPORT void JNICALL Java_sun_font_StrikeCache_freeIntMemory

    (JNIEnv *env, jclass cacheClass, jintArray jmemArray, jlong pContext) {

    int len = (*env)->GetArrayLength(env, jmemArray);

    jint* ptrs =

        (jint*)(*env)->GetPrimitiveArrayCritical(env, jmemArray, NULL);

    int i;

    if (ptrs) {

        for (i=0; i< len; i++) {

            if (ptrs[i] != 0) {

                GlyphInfo *ginfo = (GlyphInfo *)((intptr_t)ptrs[i]);

                if (ginfo->cellInfo != NULL &&

                    ginfo->managed == MANAGED_GLYPH) {

                    // invalidate this glyph's accelerated cache cell

                    AccelGlyphCache_RemoveAllCellInfos(ginfo);

                }

                free(ginfo);

            }

        }

        (*env)->ReleasePrimitiveArrayCritical(env, jmemArray, ptrs, JNI_ABORT);

    }

    if (!isNullScalerContext(jlong_to_ptr(pContext))) {

        free(jlong_to_ptr(pContext));

    }

}

/*

 * Class:     sun_font_StrikeCache

 * Method:    freeLongMemory

 * Signature: ([J)V

 */

JNIEXPORT void JNICALL Java_sun_font_StrikeCache_freeLongMemory

    (JNIEnv *env, jclass cacheClass, jlongArray jmemArray, jlong pContext) {

    int len = (*env)->GetArrayLength(env, jmemArray);

    jlong* ptrs =

        (jlong*)(*env)->GetPrimitiveArrayCritical(env, jmemArray, NULL);

    int i;

    if (ptrs) {

        for (i=0; i< len; i++) {

            if (ptrs[i] != 0L) {

                GlyphInfo *ginfo = (GlyphInfo *) jlong_to_ptr(ptrs[i]);

                if (ginfo->cellInfo != NULL &&

                    ginfo->managed == MANAGED_GLYPH) {

                    AccelGlyphCache_RemoveAllCellInfos(ginfo);

                }

                free((void*)ginfo);

            }

        }

        (*env)->ReleasePrimitiveArrayCritical(env, jmemArray, ptrs, JNI_ABORT);

    }

    if (!isNullScalerContext(jlong_to_ptr(pContext))) {

        free(jlong_to_ptr(pContext));

    }

}

JNIEXPORT void JNICALL

Java_sun_font_StrikeCache_getGlyphCacheDescription

  (JNIEnv *env, jclass cls, jlongArray results) {

    jlong* nresults;

    GlyphInfo *info;

    size_t baseAddr;

    if ((*env)->GetArrayLength(env, results) < 13) {

        return;

    }

    nresults = (jlong*)(*env)->GetPrimitiveArrayCritical(env, results, NULL);

    if (nresults == NULL) {

        return;

    }

    info = (GlyphInfo*) calloc(1, sizeof(GlyphInfo));

    if (info == NULL) {

        (*env)->ReleasePrimitiveArrayCritical(env, results, nresults, 0);

        return;

    }

    baseAddr = (size_t)info;

    nresults[0] = sizeof(void*);

    nresults[1] = sizeof(GlyphInfo);

    nresults[2] = 0;

    nresults[3] = (size_t)&(info->advanceY)-baseAddr;

    nresults[4] = (size_t)&(info->width)-baseAddr;

    nresults[5] = (size_t)&(info->height)-baseAddr;

    nresults[6] = (size_t)&(info->rowBytes)-baseAddr;

    nresults[7] = (size_t)&(info->topLeftX)-baseAddr;

    nresults[8] = (size_t)&(info->topLeftY)-baseAddr;

    nresults[9] = (size_t)&(info->image)-baseAddr;

    nresults[10] = (jlong)(uintptr_t)info; /* invisible glyph */

    nresults[11] = (size_t)&(info->cellInfo)-baseAddr;

    nresults[12] = (size_t)&(info->managed)-baseAddr;

    (*env)->ReleasePrimitiveArrayCritical(env, results, nresults, 0);

}

JNIEXPORT TTLayoutTableCache* newLayoutTableCache() {

  TTLayoutTableCache* ltc = calloc(1, sizeof(TTLayoutTableCache));

  if (ltc) {

    int i;

    for(i=0;i<LAYOUTCACHE_ENTRIES;i++) {

      ltc->entries[i].len = -1;

    }

    ltc->entries[0].tag = GDEF_TAG;

    ltc->entries[1].tag = GPOS_TAG;

    ltc->entries[2].tag = GSUB_TAG;

    ltc->entries[3].tag = HEAD_TAG;

    ltc->entries[4].tag = KERN_TAG;

    ltc->entries[5].tag = MORT_TAG;

    ltc->entries[6].tag = MORX_TAG;

  }

  return ltc;

}

JNIEXPORT void freeLayoutTableCache(TTLayoutTableCache* ltc) {

  if (ltc) {

    int i;

    for(i=0;i<LAYOUTCACHE_ENTRIES;i++) {

      if(ltc->entries[i].ptr) free (ltc->entries[i].ptr);

    }

    if (ltc->kernPairs) free(ltc->kernPairs);

    free(ltc);

  }

}