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Java example source code file (BufImgSurfaceData.c)

This example Java source code file (BufImgSurfaceData.c) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bufimg_dispose, bufimg_getrasinfo, bufimg_lock, bufimg_setupicm, bufimgriprivate, bufimgsdops, colordata, colordata\*, jni_abort, jnicall, jnu_isnull, null, surfacedataops, surfacedatarasinfo

The BufImgSurfaceData.c Java example source code

/*
 * Copyright (c) 1999, 2012, 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 "BufImgSurfaceData.h"
#include <stdlib.h>

#include "sun_awt_image_BufImgSurfaceData.h"

#include "img_util_md.h"
#include "jni_util.h"
/* Define uintptr_t */
#include "gdefs.h"

/**
 * This include file contains support code for loops using the
 * SurfaceData interface to talk to an X11 drawable from native
 * code.
 */

static LockFunc                 BufImg_Lock;
static GetRasInfoFunc           BufImg_GetRasInfo;
static ReleaseFunc              BufImg_Release;
static DisposeFunc              BufImg_Dispose;

static ColorData *BufImg_SetupICM(JNIEnv *env, BufImgSDOps *bisdo);

static jfieldID         rgbID;
static jfieldID         mapSizeID;
static jfieldID         colorDataID;
static jfieldID         pDataID;
static jfieldID         allGrayID;

static jclass           clsICMCD;
static jmethodID        initICMCDmID;
/*
 * Class:     sun_awt_image_BufImgSurfaceData
 * Method:    initIDs
 * Signature: ()V
 */
JNIEXPORT void JNICALL
Java_sun_awt_image_BufImgSurfaceData_initIDs
(JNIEnv *env, jclass bisd, jclass icm, jclass cd)
{
    if (sizeof(BufImgRIPrivate) > SD_RASINFO_PRIVATE_SIZE) {
        JNU_ThrowInternalError(env, "Private RasInfo structure too large!");
        return;
    }

    clsICMCD = (*env)->NewWeakGlobalRef(env, cd);
    initICMCDmID = (*env)->GetMethodID(env, cd, "<init>", "(J)V");
    pDataID = (*env)->GetFieldID(env, cd, "pData", "J");

    rgbID = (*env)->GetFieldID(env, icm, "rgb", "[I");
    allGrayID = (*env)->GetFieldID(env, icm, "allgrayopaque", "Z");
    mapSizeID = (*env)->GetFieldID(env, icm, "map_size", "I");
    colorDataID = (*env)->GetFieldID(env, icm, "colorData",
        "Lsun/awt/image/BufImgSurfaceData$ICMColorData;");
    if (allGrayID == 0 || rgbID == 0 || mapSizeID == 0 || pDataID == 0|| colorDataID == 0 || initICMCDmID == 0) {
        JNU_ThrowInternalError(env, "Could not get field IDs");
    }
}

/*
 * Class:     sun_java2d_SurfaceData
 * Method:    freeNativeICMData
 * Signature: (Ljava/awt/image/IndexColorModel;)V
 */
JNIEXPORT void JNICALL
Java_sun_awt_image_BufImgSurfaceData_freeNativeICMData
    (JNIEnv *env, jclass sd, jlong pData)
{
    ColorData *cdata = (ColorData*)jlong_to_ptr(pData);
    freeICMColorData(cdata);
}

/*
 * Class:     sun_awt_image_BufImgSurfaceData
 * Method:    initOps
 * Signature: (Ljava/lang/Object;IIIII)V
 */
JNIEXPORT void JNICALL
Java_sun_awt_image_BufImgSurfaceData_initRaster(JNIEnv *env, jobject bisd,
                                                jobject array,
                                                jint offset, jint bitoffset,
                                                jint width, jint height,
                                                jint pixStr, jint scanStr,
                                                jobject icm)
{
    BufImgSDOps *bisdo =
        (BufImgSDOps*)SurfaceData_InitOps(env, bisd, sizeof(BufImgSDOps));
    if (bisdo == NULL) {
        JNU_ThrowOutOfMemoryError(env, "Initialization of SurfaceData failed.");
        return;
    }
    bisdo->sdOps.Lock = BufImg_Lock;
    bisdo->sdOps.GetRasInfo = BufImg_GetRasInfo;
    bisdo->sdOps.Release = BufImg_Release;
    bisdo->sdOps.Unlock = NULL;
    bisdo->sdOps.Dispose = BufImg_Dispose;
    bisdo->array = (*env)->NewWeakGlobalRef(env, array);
    bisdo->offset = offset;
    bisdo->bitoffset = bitoffset;
    bisdo->scanStr = scanStr;
    bisdo->pixStr = pixStr;
    if (JNU_IsNull(env, icm)) {
        bisdo->lutarray = NULL;
        bisdo->lutsize = 0;
        bisdo->icm = NULL;
    } else {
        jobject lutarray = (*env)->GetObjectField(env, icm, rgbID);
        bisdo->lutarray = (*env)->NewWeakGlobalRef(env, lutarray);
        bisdo->lutsize = (*env)->GetIntField(env, icm, mapSizeID);
        bisdo->icm = (*env)->NewWeakGlobalRef(env, icm);
    }
    bisdo->rasbounds.x1 = 0;
    bisdo->rasbounds.y1 = 0;
    bisdo->rasbounds.x2 = width;
    bisdo->rasbounds.y2 = height;
}

/*
 * Method for disposing native BufImgSD
 */
static void BufImg_Dispose(JNIEnv *env, SurfaceDataOps *ops)
{
    /* ops is assumed non-null as it is checked in SurfaceData_DisposeOps */
    BufImgSDOps *bisdo = (BufImgSDOps *)ops;
    (*env)->DeleteWeakGlobalRef(env, bisdo->array);
    if (bisdo->lutarray != NULL) {
        (*env)->DeleteWeakGlobalRef(env, bisdo->lutarray);
    }
    if (bisdo->icm != NULL) {
        (*env)->DeleteWeakGlobalRef(env, bisdo->icm);
    }
}

static jint BufImg_Lock(JNIEnv *env,
                        SurfaceDataOps *ops,
                        SurfaceDataRasInfo *pRasInfo,
                        jint lockflags)
{
    BufImgSDOps *bisdo = (BufImgSDOps *)ops;
    BufImgRIPrivate *bipriv = (BufImgRIPrivate *) &(pRasInfo->priv);

    if ((lockflags & (SD_LOCK_LUT)) != 0 && JNU_IsNull(env, bisdo->lutarray)) {
        /* REMIND: Should this be an InvalidPipe exception? */
        JNU_ThrowNullPointerException(env, "Attempt to lock missing colormap");
        return SD_FAILURE;
    }
    if ((lockflags & SD_LOCK_INVCOLOR) != 0 ||
        (lockflags & SD_LOCK_INVGRAY) != 0)
    {
        bipriv->cData = BufImg_SetupICM(env, bisdo);
        if (bipriv->cData == NULL) {
            JNU_ThrowNullPointerException(env, "Could not initialize "
                                          "inverse tables");
            return SD_FAILURE;
        }
    } else {
        bipriv->cData = NULL;
    }

    bipriv->lockFlags = lockflags;
    bipriv->base = NULL;
    bipriv->lutbase = NULL;

    SurfaceData_IntersectBounds(&pRasInfo->bounds, &bisdo->rasbounds);

    return SD_SUCCESS;
}

static void BufImg_GetRasInfo(JNIEnv *env,
                              SurfaceDataOps *ops,
                              SurfaceDataRasInfo *pRasInfo)
{
    BufImgSDOps *bisdo = (BufImgSDOps *)ops;
    BufImgRIPrivate *bipriv = (BufImgRIPrivate *) &(pRasInfo->priv);

    if ((bipriv->lockFlags & (SD_LOCK_RD_WR)) != 0) {
        bipriv->base =
            (*env)->GetPrimitiveArrayCritical(env, bisdo->array, NULL);
    }
    if ((bipriv->lockFlags & (SD_LOCK_LUT)) != 0) {
        bipriv->lutbase =
            (*env)->GetPrimitiveArrayCritical(env, bisdo->lutarray, NULL);
    }

    if (bipriv->base == NULL) {
        pRasInfo->rasBase = NULL;
        pRasInfo->pixelStride = 0;
        pRasInfo->pixelBitOffset = 0;
        pRasInfo->scanStride = 0;
    } else {
        pRasInfo->rasBase = (void *)
            (((uintptr_t) bipriv->base) + bisdo->offset);
        pRasInfo->pixelStride = bisdo->pixStr;
        pRasInfo->pixelBitOffset = bisdo->bitoffset;
        pRasInfo->scanStride = bisdo->scanStr;
    }
    if (bipriv->lutbase == NULL) {
        pRasInfo->lutBase = NULL;
        pRasInfo->lutSize = 0;
    } else {
        pRasInfo->lutBase = bipriv->lutbase;
        pRasInfo->lutSize = bisdo->lutsize;
    }
    if (bipriv->cData == NULL) {
        pRasInfo->invColorTable = NULL;
        pRasInfo->redErrTable = NULL;
        pRasInfo->grnErrTable = NULL;
        pRasInfo->bluErrTable = NULL;
    } else {
        pRasInfo->invColorTable = bipriv->cData->img_clr_tbl;
        pRasInfo->redErrTable = bipriv->cData->img_oda_red;
        pRasInfo->grnErrTable = bipriv->cData->img_oda_green;
        pRasInfo->bluErrTable = bipriv->cData->img_oda_blue;
        pRasInfo->invGrayTable = bipriv->cData->pGrayInverseLutData;
    }
}

static void BufImg_Release(JNIEnv *env,
                           SurfaceDataOps *ops,
                           SurfaceDataRasInfo *pRasInfo)
{
    BufImgSDOps *bisdo = (BufImgSDOps *)ops;
    BufImgRIPrivate *bipriv = (BufImgRIPrivate *) &(pRasInfo->priv);

    if (bipriv->base != NULL) {
        jint mode = (((bipriv->lockFlags & (SD_LOCK_WRITE)) != 0)
                     ? 0 : JNI_ABORT);
        (*env)->ReleasePrimitiveArrayCritical(env, bisdo->array,
                                              bipriv->base, mode);
    }
    if (bipriv->lutbase != NULL) {
        (*env)->ReleasePrimitiveArrayCritical(env, bisdo->lutarray,
                                              bipriv->lutbase, JNI_ABORT);
    }
}

static ColorData *BufImg_SetupICM(JNIEnv *env,
                                  BufImgSDOps *bisdo)
{
    ColorData *cData = NULL;
    jobject colorData;

    if (JNU_IsNull(env, bisdo->icm)) {
        return (ColorData *) NULL;
    }

    colorData = (*env)->GetObjectField(env, bisdo->icm, colorDataID);

    if (JNU_IsNull(env, colorData)) {
        if (JNU_IsNull(env, clsICMCD)) {
            // we are unable to create a wrapper object
            return (ColorData*)NULL;
        }
    } else {
        cData = (ColorData*)JNU_GetLongFieldAsPtr(env, colorData, pDataID);
    }

    if (cData != NULL) {
        return cData;
    }

    cData = (ColorData*)calloc(1, sizeof(ColorData));

    if (cData != NULL) {
        jboolean allGray
            = (*env)->GetBooleanField(env, bisdo->icm, allGrayID);
        int *pRgb = (int *)
            ((*env)->GetPrimitiveArrayCritical(env, bisdo->lutarray, NULL));
        cData->img_clr_tbl = initCubemap(pRgb, bisdo->lutsize, 32);
        if (allGray == JNI_TRUE) {
            initInverseGrayLut(pRgb, bisdo->lutsize, cData);
        }
        (*env)->ReleasePrimitiveArrayCritical(env, bisdo->lutarray, pRgb,
                                              JNI_ABORT);

        initDitherTables(cData);

        if (JNU_IsNull(env, colorData)) {
            jlong pData = ptr_to_jlong(cData);
            colorData = (*env)->NewObjectA(env, clsICMCD, initICMCDmID, (jvalue *)&pData);
            (*env)->SetObjectField(env, bisdo->icm, colorDataID, colorData);
        }
    }

    return cData;
}

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