/*

 * 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.

 *

 * 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.

 *

 */

#import <JavaNativeFoundation/JavaNativeFoundation.h>

#import "AWTFont.h"

#import "CoreTextSupport.h"

#import "sun_font_CCharToGlyphMapper.h"

/*

 * Class:     sun_font_CCharToGlyphMapper

 * Method:    countGlyphs

 * Signature: (J)I

 */

JNIEXPORT jint JNICALL

Java_sun_font_CCharToGlyphMapper_countGlyphs

    (JNIEnv *env, jclass clazz, jlong awtFontPtr)

{

    jint numGlyphs = 0;

JNF_COCOA_ENTER(env);

    AWTFont *awtFont = (AWTFont *)jlong_to_ptr(awtFontPtr);

    numGlyphs = [awtFont->fFont numberOfGlyphs];

JNF_COCOA_EXIT(env);

    return numGlyphs;

}

static inline void

GetGlyphsFromUnicodes(JNIEnv *env, AWTFont *awtFont,

                      jint count, UniChar *unicodes,

                      CGGlyph *cgGlyphs, jintArray glyphs)

{

    jint *glyphCodeInts = (*env)->GetPrimitiveArrayCritical(env, glyphs, 0);

    CTS_GetGlyphsAsIntsForCharacters(awtFont, unicodes,

                                     cgGlyphs, glyphCodeInts, count);

    // Do not use JNI_COMMIT, as that will not free the buffer copy

    // when +ProtectJavaHeap is on.

    (*env)->ReleasePrimitiveArrayCritical(env, glyphs, glyphCodeInts, 0);

}

static inline void

AllocateGlyphBuffer(JNIEnv *env, AWTFont *awtFont,

                    jint count, UniChar *unicodes, jintArray glyphs)

{

    if (count < MAX_STACK_ALLOC_GLYPH_BUFFER_SIZE) {

        CGGlyph cgGlyphs[count];

        GetGlyphsFromUnicodes(env, awtFont, count, unicodes, cgGlyphs, glyphs);

    } else {

        CGGlyph *cgGlyphs = (CGGlyph *)malloc(count * sizeof(CGGlyph));

        GetGlyphsFromUnicodes(env, awtFont, count, unicodes, cgGlyphs, glyphs);

        free(cgGlyphs);

    }

}

/*

 * Class:     sun_font_CCharToGlyphMapper

 * Method:    nativeCharsToGlyphs

 * Signature: (JI[C[I)V

 */

JNIEXPORT void JNICALL

Java_sun_font_CCharToGlyphMapper_nativeCharsToGlyphs

    (JNIEnv *env, jclass clazz,

     jlong awtFontPtr, jint count, jcharArray unicodes, jintArray glyphs)

{

JNF_COCOA_ENTER(env);

    AWTFont *awtFont = (AWTFont *)jlong_to_ptr(awtFontPtr);

    // check the array size

    jint len = (*env)->GetArrayLength(env, glyphs);

    if (len < count) {

        count = len;

    }

    jchar *unicodesAsChars =

        (*env)->GetPrimitiveArrayCritical(env, unicodes, NULL);

    AllocateGlyphBuffer(env, awtFont, count, (UniChar *)unicodesAsChars, glyphs);

    (*env)->ReleasePrimitiveArrayCritical(env, unicodes,

                                          unicodesAsChars, JNI_ABORT);

JNF_COCOA_EXIT(env);

}