Java example source code file (awt_parseImage.c)
The awt_parseImage.c Java example source code/*
* Copyright (c) 1997, 2013, 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 <stdio.h>
#include <stdlib.h>
#include "awt_parseImage.h"
#include "imageInitIDs.h"
#include "java_awt_Transparency.h"
#include "java_awt_image_BufferedImage.h"
#include "sun_awt_image_IntegerComponentRaster.h"
#include "sun_awt_image_ImagingLib.h"
#include "java_awt_color_ColorSpace.h"
#include "awt_Mlib.h"
#include "safe_alloc.h"
#include "safe_math.h"
static int setHints(JNIEnv *env, BufImageS_t *imageP);
/* Parse the buffered image. All of the raster information is returned in the
* imagePP structure.
*
* The handleCustom parameter specifies whether or not the caller
* can use custom channels. If it is false and a custom channel
* is encountered, the returned value will be 0 and all structures
* will be deallocated.
*
* Return value:
* -1: Exception
* 0: Can't do it.
* 1: Success
*/
int awt_parseImage(JNIEnv *env, jobject jimage, BufImageS_t **imagePP,
int handleCustom) {
BufImageS_t *imageP;
int status;
jobject jraster;
jobject jcmodel;
/* Make sure the image exists */
if (JNU_IsNull(env, jimage)) {
JNU_ThrowNullPointerException(env, "null BufferedImage object");
return -1;
}
if ((imageP = (BufImageS_t *) calloc(1, sizeof(BufImageS_t))) == NULL) {
JNU_ThrowOutOfMemoryError(env, "Out of memory");
return -1;
}
imageP->jimage = jimage;
/* Retrieve the raster */
if ((jraster = (*env)->GetObjectField(env, jimage,
g_BImgRasterID)) == NULL) {
free((void *) imageP);
JNU_ThrowNullPointerException(env, "null Raster object");
return 0;
}
/* Retrieve the image type */
imageP->imageType = (*env)->GetIntField(env, jimage, g_BImgTypeID);
/* Parse the raster */
if ((status = awt_parseRaster(env, jraster, &imageP->raster)) <= 0) {
free((void *)imageP);
return status;
}
/* Retrieve the color model */
if ((jcmodel = (*env)->GetObjectField(env, jimage, g_BImgCMID)) == NULL) {
free((void *) imageP);
JNU_ThrowNullPointerException(env, "null Raster object");
return 0;
}
/* Parse the color model */
if ((status = awt_parseColorModel(env, jcmodel, imageP->imageType,
&imageP->cmodel)) <= 0) {
awt_freeParsedRaster(&imageP->raster, FALSE);
free((void *)imageP);
return 0;
}
/* Set hints */
if ((status = setHints(env, imageP)) <= 0) {
awt_freeParsedImage(imageP, TRUE);
return 0;
}
*imagePP = imageP;
return status;
}
/* Verifies whether the channel offsets are sane and correspond to the type of
* the raster.
*
* Return value:
* 0: Failure: channel offsets are invalid
* 1: Success
*/
static int checkChannelOffsets(RasterS_t *rasterP, int dataArrayLength) {
int i, lastPixelOffset, lastScanOffset;
switch (rasterP->rasterType) {
case COMPONENT_RASTER_TYPE:
if (!SAFE_TO_MULT(rasterP->height, rasterP->scanlineStride)) {
return 0;
}
if (!SAFE_TO_MULT(rasterP->width, rasterP->pixelStride)) {
return 0;
}
lastScanOffset = (rasterP->height - 1) * rasterP->scanlineStride;
lastPixelOffset = (rasterP->width - 1) * rasterP->pixelStride;
if (!SAFE_TO_ADD(lastPixelOffset, lastScanOffset)) {
return 0;
}
lastPixelOffset += lastScanOffset;
for (i = 0; i < rasterP->numDataElements; i++) {
int off = rasterP->chanOffsets[i];
int size = lastPixelOffset + off;
if (off < 0 || !SAFE_TO_ADD(lastPixelOffset, off)) {
return 0;
}
if (size < lastPixelOffset || size >= dataArrayLength) {
// an overflow, or insufficient buffer capacity
return 0;
}
}
return 1;
case BANDED_RASTER_TYPE:
// NB:caller does not support the banded rasters yet,
// so this branch of the code must be re-defined in
// order to provide valid criteria for the data offsets
// verification, when/if banded rasters will be supported.
// At the moment, we prohibit banded rasters as well.
return 0;
default:
// PACKED_RASTER_TYPE: does not support channel offsets
// UNKNOWN_RASTER_TYPE: should not be used, likely indicates an error
return 0;
}
}
/* Parse the raster. All of the raster information is returned in the
* rasterP structure.
*
* Return value:
* -1: Exception
* 0: Can't do it (Custom channel)
* 1: Success
*/
int awt_parseRaster(JNIEnv *env, jobject jraster, RasterS_t *rasterP) {
jobject joffs = NULL;
/* int status;*/
if (JNU_IsNull(env, jraster)) {
JNU_ThrowNullPointerException(env, "null Raster object");
return -1;
}
rasterP->jraster = jraster;
rasterP->width = (*env)->GetIntField(env, jraster, g_RasterWidthID);
rasterP->height = (*env)->GetIntField(env, jraster, g_RasterHeightID);
rasterP->numDataElements = (*env)->GetIntField(env, jraster,
g_RasterNumDataElementsID);
rasterP->numBands = (*env)->GetIntField(env, jraster,
g_RasterNumBandsID);
rasterP->baseOriginX = (*env)->GetIntField(env, jraster,
g_RasterBaseOriginXID);
rasterP->baseOriginY = (*env)->GetIntField(env, jraster,
g_RasterBaseOriginYID);
rasterP->minX = (*env)->GetIntField(env, jraster, g_RasterMinXID);
rasterP->minY = (*env)->GetIntField(env, jraster, g_RasterMinYID);
rasterP->jsampleModel = (*env)->GetObjectField(env, jraster,
g_RasterSampleModelID);
if (JNU_IsNull(env, rasterP->jsampleModel)) {
JNU_ThrowNullPointerException(env, "null Raster object");
return -1;
}
// make sure that the raster type is initialized
rasterP->rasterType = UNKNOWN_RASTER_TYPE;
if (rasterP->numBands <= 0 ||
rasterP->numBands > MAX_NUMBANDS)
{
/*
* we can't handle such kind of rasters due to limitations
* of SPPSampleModelS_t structure and expand/set methods.
*/
return 0;
}
rasterP->sppsm.isUsed = 0;
if ((*env)->IsInstanceOf(env, rasterP->jsampleModel,
(*env)->FindClass(env,"java/awt/image/SinglePixelPackedSampleModel"))) {
jobject jmask, joffs, jnbits;
rasterP->sppsm.isUsed = 1;
rasterP->sppsm.maxBitSize = (*env)->GetIntField(env,
rasterP->jsampleModel,
g_SPPSMmaxBitID);
jmask = (*env)->GetObjectField(env, rasterP->jsampleModel,
g_SPPSMmaskArrID);
joffs = (*env)->GetObjectField(env, rasterP->jsampleModel,
g_SPPSMmaskOffID);
jnbits = (*env)->GetObjectField(env, rasterP->jsampleModel,
g_SPPSMnBitsID);
if (jmask == NULL || joffs == NULL || jnbits == NULL ||
rasterP->sppsm.maxBitSize < 0)
{
JNU_ThrowInternalError(env, "Can't grab SPPSM fields");
return -1;
}
(*env)->GetIntArrayRegion(env, jmask, 0,
rasterP->numBands, rasterP->sppsm.maskArray);
(*env)->GetIntArrayRegion(env, joffs, 0,
rasterP->numBands, rasterP->sppsm.offsets);
(*env)->GetIntArrayRegion(env, jnbits, 0,
rasterP->numBands, rasterP->sppsm.nBits);
}
rasterP->baseRasterWidth = (*env)->GetIntField(env, rasterP->jsampleModel,
g_SMWidthID);
rasterP->baseRasterHeight = (*env)->GetIntField(env,
rasterP->jsampleModel,
g_SMHeightID);
if ((*env)->IsInstanceOf(env, jraster,
(*env)->FindClass(env, "sun/awt/image/IntegerComponentRaster"))){
rasterP->jdata = (*env)->GetObjectField(env, jraster, g_ICRdataID);
rasterP->dataType = INT_DATA_TYPE;
rasterP->dataSize = 4;
rasterP->dataIsShared = TRUE;
rasterP->rasterType = COMPONENT_RASTER_TYPE;
rasterP->type = (*env)->GetIntField(env, jraster, g_ICRtypeID);
rasterP->scanlineStride = (*env)->GetIntField(env, jraster, g_ICRscanstrID);
rasterP->pixelStride = (*env)->GetIntField(env, jraster, g_ICRpixstrID);
joffs = (*env)->GetObjectField(env, jraster, g_ICRdataOffsetsID);
}
else if ((*env)->IsInstanceOf(env, jraster,
(*env)->FindClass(env, "sun/awt/image/ByteComponentRaster"))){
rasterP->jdata = (*env)->GetObjectField(env, jraster, g_BCRdataID);
rasterP->dataType = BYTE_DATA_TYPE;
rasterP->dataSize = 1;
rasterP->dataIsShared = TRUE;
rasterP->rasterType = COMPONENT_RASTER_TYPE;
rasterP->type = (*env)->GetIntField(env, jraster, g_BCRtypeID);
rasterP->scanlineStride = (*env)->GetIntField(env, jraster, g_BCRscanstrID);
rasterP->pixelStride = (*env)->GetIntField(env, jraster, g_BCRpixstrID);
joffs = (*env)->GetObjectField(env, jraster, g_BCRdataOffsetsID);
}
else if ((*env)->IsInstanceOf(env, jraster,
(*env)->FindClass(env, "sun/awt/image/ShortComponentRaster"))){
rasterP->jdata = (*env)->GetObjectField(env, jraster, g_SCRdataID);
rasterP->dataType = SHORT_DATA_TYPE;
rasterP->dataSize = 2;
rasterP->dataIsShared = TRUE;
rasterP->rasterType = COMPONENT_RASTER_TYPE;
rasterP->type = (*env)->GetIntField(env, jraster, g_SCRtypeID);
rasterP->scanlineStride = (*env)->GetIntField(env, jraster, g_SCRscanstrID);
rasterP->pixelStride = (*env)->GetIntField(env, jraster, g_SCRpixstrID);
joffs = (*env)->GetObjectField(env, jraster, g_SCRdataOffsetsID);
}
else if ((*env)->IsInstanceOf(env, jraster,
(*env)->FindClass(env, "sun/awt/image/BytePackedRaster"))){
rasterP->rasterType = PACKED_RASTER_TYPE;
rasterP->dataType = BYTE_DATA_TYPE;
rasterP->dataSize = 1;
rasterP->scanlineStride = (*env)->GetIntField(env, jraster, g_BPRscanstrID);
rasterP->pixelStride = (*env)->GetIntField(env, jraster, g_BPRpixstrID);
rasterP->jdata = (*env)->GetObjectField(env, jraster, g_BPRdataID);
rasterP->type = (*env)->GetIntField(env, jraster, g_BPRtypeID);
rasterP->chanOffsets = NULL;
if (SAFE_TO_ALLOC_2(rasterP->numDataElements, sizeof(jint))) {
rasterP->chanOffsets =
(jint *)malloc(rasterP->numDataElements * sizeof(jint));
}
if (rasterP->chanOffsets == NULL) {
/* Out of memory */
JNU_ThrowOutOfMemoryError(env, "Out of memory");
return -1;
}
rasterP->chanOffsets[0] = (*env)->GetIntField(env, jraster, g_BPRdataBitOffsetID);
rasterP->dataType = BYTE_DATA_TYPE;
}
else {
rasterP->type = sun_awt_image_IntegerComponentRaster_TYPE_CUSTOM;
rasterP->dataType = UNKNOWN_DATA_TYPE;
rasterP->rasterType = UNKNOWN_RASTER_TYPE;
rasterP->chanOffsets = NULL;
/* Custom raster */
return 0;
}
// do basic validation of the raster structure
if (rasterP->width <= 0 || rasterP->height <= 0 ||
rasterP->pixelStride <= 0 || rasterP->scanlineStride <= 0)
{
// invalid raster
return -1;
}
// channel (data) offsets
switch (rasterP->rasterType) {
case COMPONENT_RASTER_TYPE:
case BANDED_RASTER_TYPE: // note that this routine does not support banded rasters at the moment
// get channel (data) offsets
rasterP->chanOffsets = NULL;
if (SAFE_TO_ALLOC_2(rasterP->numDataElements, sizeof(jint))) {
rasterP->chanOffsets =
(jint *)malloc(rasterP->numDataElements * sizeof(jint));
}
if (rasterP->chanOffsets == NULL) {
/* Out of memory */
JNU_ThrowOutOfMemoryError(env, "Out of memory");
return -1;
}
(*env)->GetIntArrayRegion(env, joffs, 0, rasterP->numDataElements,
rasterP->chanOffsets);
if (rasterP->jdata == NULL) {
// unable to verify the raster
return -1;
}
// verify whether channel offsets look sane
if (!checkChannelOffsets(rasterP, (*env)->GetArrayLength(env, rasterP->jdata))) {
return -1;
}
break;
default:
; // PACKED_RASTER_TYPE does not use the channel offsets.
}
/* additional check for sppsm fields validity: make sure that
* size of raster samples doesn't exceed the data type capacity.
*/
if (rasterP->dataType > UNKNOWN_DATA_TYPE && /* data type has been recognized */
rasterP->sppsm.maxBitSize > 0 && /* raster has SPP sample model */
rasterP->sppsm.maxBitSize > (rasterP->dataSize * 8))
{
JNU_ThrowInternalError(env, "Raster samples are too big");
return -1;
}
#if 0
fprintf(stderr,"---------------------\n");
fprintf(stderr,"Width : %d\n",rasterP->width);
fprintf(stderr,"Height : %d\n",rasterP->height);
fprintf(stderr,"X : %d\n",rasterP->x);
fprintf(stderr,"Y : %d\n",rasterP->y);
fprintf(stderr,"numC : %d\n",rasterP->numDataElements);
fprintf(stderr,"SS : %d\n",rasterP->scanlineStride);
fprintf(stderr,"PS : %d\n",rasterP->pixelStride);
fprintf(stderr,"CO : %d\n",rasterP->chanOffsets);
fprintf(stderr,"shared?: %d\n",rasterP->dataIsShared);
fprintf(stderr,"RasterT: %d\n",rasterP->rasterType);
fprintf(stderr,"DataT : %d\n",rasterP->dataType);
fprintf(stderr,"---------------------\n");
#endif
return 1;
}
static int getColorModelType(JNIEnv *env, jobject jcmodel) {
int type = UNKNOWN_CM_TYPE;
if ((*env)->IsInstanceOf(env, jcmodel,
(*env)->FindClass(env, "java/awt/image/IndexColorModel")))
{
type = INDEX_CM_TYPE;
} else if ((*env)->IsInstanceOf(env, jcmodel,
(*env)->FindClass(env, "java/awt/image/PackedColorModel")))
{
if ((*env)->IsInstanceOf(env, jcmodel,
(*env)->FindClass(env, "java/awt/image/DirectColorModel"))) {
type = DIRECT_CM_TYPE;
}
else {
type = PACKED_CM_TYPE;
}
}
else if ((*env)->IsInstanceOf(env, jcmodel,
(*env)->FindClass(env, "java/awt/image/ComponentColorModel")))
{
type = COMPONENT_CM_TYPE;
}
return type;
}
int awt_parseColorModel (JNIEnv *env, jobject jcmodel, int imageType,
ColorModelS_t *cmP) {
/*jmethodID jID; */
jobject jnBits;
jsize nBitsLength;
int i;
static jobject s_jdefCM = NULL;
if (JNU_IsNull(env, jcmodel)) {
JNU_ThrowNullPointerException(env, "null ColorModel object");
return -1;
}
cmP->jcmodel = jcmodel;
cmP->jcspace = (*env)->GetObjectField(env, jcmodel, g_CMcspaceID);
cmP->numComponents = (*env)->GetIntField(env, jcmodel,
g_CMnumComponentsID);
cmP->supportsAlpha = (*env)->GetBooleanField(env, jcmodel,
g_CMsuppAlphaID);
cmP->isAlphaPre = (*env)->GetBooleanField(env,jcmodel,
g_CMisAlphaPreID);
cmP->transparency = (*env)->GetIntField(env, jcmodel,
g_CMtransparencyID);
jnBits = (*env)->GetObjectField(env, jcmodel, g_CMnBitsID);
if (jnBits == NULL) {
JNU_ThrowNullPointerException(env, "null nBits structure in CModel");
return -1;
}
nBitsLength = (*env)->GetArrayLength(env, jnBits);
if (nBitsLength != cmP->numComponents) {
// invalid number of components?
return -1;
}
cmP->nBits = NULL;
if (SAFE_TO_ALLOC_2(cmP->numComponents, sizeof(jint))) {
cmP->nBits = (jint *)malloc(cmP->numComponents * sizeof(jint));
}
if (cmP->nBits == NULL){
JNU_ThrowOutOfMemoryError(env, "Out of memory");
return -1;
}
(*env)->GetIntArrayRegion(env, jnBits, 0, cmP->numComponents,
cmP->nBits);
cmP->maxNbits = 0;
for (i=0; i < cmP->numComponents; i++) {
if (cmP->maxNbits < cmP->nBits[i]) {
cmP->maxNbits = cmP->nBits[i];
}
}
cmP->is_sRGB = (*env)->GetBooleanField(env, cmP->jcmodel, g_CMis_sRGBID);
cmP->csType = (*env)->GetIntField(env, cmP->jcmodel, g_CMcsTypeID);
cmP->cmType = getColorModelType(env, jcmodel);
cmP->isDefaultCM = FALSE;
cmP->isDefaultCompatCM = FALSE;
/* look for standard cases */
if (imageType == java_awt_image_BufferedImage_TYPE_INT_ARGB) {
cmP->isDefaultCM = TRUE;
cmP->isDefaultCompatCM = TRUE;
} else if (imageType == java_awt_image_BufferedImage_TYPE_INT_ARGB_PRE ||
imageType == java_awt_image_BufferedImage_TYPE_INT_RGB ||
imageType == java_awt_image_BufferedImage_TYPE_INT_BGR ||
imageType == java_awt_image_BufferedImage_TYPE_4BYTE_ABGR ||
imageType == java_awt_image_BufferedImage_TYPE_4BYTE_ABGR_PRE)
{
cmP->isDefaultCompatCM = TRUE;
}
else {
/* Figure out if this is the default CM */
if (s_jdefCM == NULL) {
jobject defCM;
jclass jcm = (*env)->FindClass(env, "java/awt/image/ColorModel");
defCM = (*env)->CallStaticObjectMethod(env, jcm,
g_CMgetRGBdefaultMID, NULL);
s_jdefCM = (*env)->NewGlobalRef(env, defCM);
if (defCM == NULL || s_jdefCM == NULL) {
JNU_ThrowNullPointerException(env,
"Unable to find default CM");
return -1;
}
}
cmP->isDefaultCM = ((*env)->IsSameObject(env, s_jdefCM, jcmodel));
cmP->isDefaultCompatCM = cmP->isDefaultCM;
}
/* check whether image attributes correspond to default cm */
if (cmP->isDefaultCompatCM) {
if (cmP->csType != java_awt_color_ColorSpace_TYPE_RGB ||
!cmP->is_sRGB)
{
return -1;
}
for (i = 0; i < cmP->numComponents; i++) {
if (cmP->nBits[i] != 8) {
return -1;
}
}
}
/* Get index color model attributes */
if (imageType == java_awt_image_BufferedImage_TYPE_BYTE_INDEXED ||
cmP->cmType == INDEX_CM_TYPE)
{
cmP->transIdx = (*env)->GetIntField(env, jcmodel, g_ICMtransIdxID);
cmP->mapSize = (*env)->GetIntField(env, jcmodel, g_ICMmapSizeID);
cmP->jrgb = (*env)->GetObjectField(env, jcmodel, g_ICMrgbID);
if (cmP->transIdx == -1) {
/* Need to find the transparent index */
int *rgb = (int *) (*env)->GetPrimitiveArrayCritical(env,
cmP->jrgb,
NULL);
if (rgb == NULL) {
return -1;
}
for (i=0; i < cmP->mapSize; i++) {
if ((rgb[i]&0xff000000) == 0) {
cmP->transIdx = i;
break;
}
}
(*env)->ReleasePrimitiveArrayCritical(env, cmP->jrgb, rgb,
JNI_ABORT);
if (cmP->transIdx == -1) {
/* Now what? No transparent pixel... */
cmP->transIdx = 0;
}
}
}
return 1;
}
void awt_freeParsedRaster(RasterS_t *rasterP, int freeRasterP) {
if (rasterP->chanOffsets) {
free((void *) rasterP->chanOffsets);
}
if (freeRasterP) {
free((void *) rasterP);
}
}
void awt_freeParsedImage(BufImageS_t *imageP, int freeImageP) {
if (imageP->hints.colorOrder) {
free ((void *) imageP->hints.colorOrder);
}
if (imageP->cmodel.nBits) {
free ((void *) imageP->cmodel.nBits);
}
/* Free the raster */
awt_freeParsedRaster(&imageP->raster, FALSE);
if (freeImageP) {
free((void *) imageP);
}
}
static void
awt_getBIColorOrder(int type, int *colorOrder) {
switch(type) {
case java_awt_image_BufferedImage_TYPE_INT_ARGB:
case java_awt_image_BufferedImage_TYPE_INT_ARGB_PRE:
#ifdef _LITTLE_ENDIAN
colorOrder[0] = 2;
colorOrder[1] = 1;
colorOrder[2] = 0;
colorOrder[3] = 3;
#else
colorOrder[0] = 1;
colorOrder[1] = 2;
colorOrder[2] = 3;
colorOrder[3] = 0;
#endif
break;
case java_awt_image_BufferedImage_TYPE_INT_BGR:
#ifdef _LITTLE_ENDIAN
colorOrder[0] = 0;
colorOrder[1] = 1;
colorOrder[2] = 2;
#else
colorOrder[0] = 3;
colorOrder[1] = 2;
colorOrder[2] = 1;
#endif
break;
case java_awt_image_BufferedImage_TYPE_INT_RGB:
#ifdef _LITTLE_ENDIAN
colorOrder[0] = 2;
colorOrder[1] = 1;
colorOrder[2] = 0;
#else
colorOrder[0] = 1;
colorOrder[1] = 2;
colorOrder[2] = 3;
#endif
break;
case java_awt_image_BufferedImage_TYPE_4BYTE_ABGR:
case java_awt_image_BufferedImage_TYPE_4BYTE_ABGR_PRE:
colorOrder[0] = 3;
colorOrder[1] = 2;
colorOrder[2] = 1;
colorOrder[3] = 0;
break;
case java_awt_image_BufferedImage_TYPE_3BYTE_BGR:
colorOrder[0] = 2;
colorOrder[1] = 1;
colorOrder[2] = 0;
break;
case java_awt_image_BufferedImage_TYPE_USHORT_565_RGB:
case java_awt_image_BufferedImage_TYPE_USHORT_555_RGB:
colorOrder[0] = 0;
colorOrder[1] = 1;
colorOrder[2] = 2;
break;
case java_awt_image_BufferedImage_TYPE_BYTE_GRAY:
case java_awt_image_BufferedImage_TYPE_USHORT_GRAY:
case java_awt_image_BufferedImage_TYPE_BYTE_BINARY:
case java_awt_image_BufferedImage_TYPE_BYTE_INDEXED:
colorOrder[0] = 0;
break;
}
}
static int
setHints(JNIEnv *env, BufImageS_t *imageP) {
HintS_t *hintP = &imageP->hints;
RasterS_t *rasterP = &imageP->raster;
ColorModelS_t *cmodelP = &imageP->cmodel;
int imageType = imageP->imageType;
// check whether raster and color model are compatible
if (cmodelP->numComponents != rasterP->numBands) {
if (cmodelP->cmType != INDEX_CM_TYPE) {
return -1;
}
}
hintP->numChans = imageP->cmodel.numComponents;
hintP->colorOrder = NULL;
if (SAFE_TO_ALLOC_2(hintP->numChans, sizeof(int))) {
hintP->colorOrder = (int *)malloc(hintP->numChans * sizeof(int));
}
if (hintP->colorOrder == NULL) {
JNU_ThrowOutOfMemoryError(env, "Out of memory");
return -1;
}
if (imageType != java_awt_image_BufferedImage_TYPE_CUSTOM) {
awt_getBIColorOrder(imageType, hintP->colorOrder);
}
if (imageType == java_awt_image_BufferedImage_TYPE_INT_ARGB ||
imageType == java_awt_image_BufferedImage_TYPE_INT_ARGB_PRE ||
imageType == java_awt_image_BufferedImage_TYPE_INT_RGB)
{
hintP->channelOffset = rasterP->chanOffsets[0];
/* These hints are #bytes */
hintP->dataOffset = hintP->channelOffset*rasterP->dataSize;
hintP->sStride = rasterP->scanlineStride*rasterP->dataSize;
hintP->pStride = rasterP->pixelStride*rasterP->dataSize;
hintP->packing = BYTE_INTERLEAVED;
} else if (imageType ==java_awt_image_BufferedImage_TYPE_4BYTE_ABGR ||
imageType==java_awt_image_BufferedImage_TYPE_4BYTE_ABGR_PRE||
imageType == java_awt_image_BufferedImage_TYPE_3BYTE_BGR ||
imageType == java_awt_image_BufferedImage_TYPE_INT_BGR)
{
if (imageType == java_awt_image_BufferedImage_TYPE_INT_BGR) {
hintP->channelOffset = rasterP->chanOffsets[0];
}
else {
hintP->channelOffset = rasterP->chanOffsets[hintP->numChans-1];
}
hintP->dataOffset = hintP->channelOffset*rasterP->dataSize;
hintP->sStride = rasterP->scanlineStride*rasterP->dataSize;
hintP->pStride = rasterP->pixelStride*rasterP->dataSize;
hintP->packing = BYTE_INTERLEAVED;
} else if (imageType==java_awt_image_BufferedImage_TYPE_USHORT_565_RGB ||
imageType==java_awt_image_BufferedImage_TYPE_USHORT_555_RGB) {
hintP->needToExpand = TRUE;
hintP->expandToNbits = 8;
hintP->packing = PACKED_SHORT_INTER;
} else if (cmodelP->cmType == INDEX_CM_TYPE) {
int i;
hintP->numChans = 1;
hintP->channelOffset = rasterP->chanOffsets[0];
hintP->dataOffset = hintP->channelOffset*rasterP->dataSize;
hintP->sStride = rasterP->scanlineStride*rasterP->dataSize;
hintP->pStride = rasterP->pixelStride*rasterP->dataSize;
switch(rasterP->dataType ) {
case BYTE_DATA_TYPE:
if (rasterP->rasterType == PACKED_RASTER_TYPE) {
hintP->needToExpand = TRUE;
hintP->expandToNbits = 8;
hintP->packing = BYTE_PACKED_BAND;
}
else {
hintP->packing = BYTE_SINGLE_BAND;
}
break;
case SHORT_DATA_TYPE:
hintP->packing = SHORT_SINGLE_BAND;
break;
case INT_DATA_TYPE:
default:
hintP->packing = UNKNOWN_PACKING;
break;
}
for (i=0; i < hintP->numChans; i++) {
hintP->colorOrder[i] = i;
}
}
else if (cmodelP->cmType == COMPONENT_CM_TYPE) {
/* Figure out if it is interleaved */
int bits=1;
int i;
int low = rasterP->chanOffsets[0];
int diff;
int banded = 0;
for (i=1; i < hintP->numChans; i++) {
if (rasterP->chanOffsets[i] < low) {
low = rasterP->chanOffsets[i];
}
}
for (i=1; i < hintP->numChans; i++) {
diff = rasterP->chanOffsets[i]-low;
if (diff < hintP->numChans) {
if (bits & (1<
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