PRUint16*
MapToCCMap(PRUint32* aMap)
{
// put the data into a temp map
nsCompressedCharMap ccmapObj;
ccmapObj.SetChars(aMap);
PRUint16 *ccmap = (PRUint16*)PR_Malloc((CCMAP_EXTRA + ccmapObj.GetSize()) * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = ccmapObj.GetSize();
CCMAP_FLAG(ccmap) = CCMAP_NONE_FLAG;
ccmapObj.FillCCMap(ccmap);
#ifdef DEBUG
for (int i=0; i<NUM_UNICODE_CHARS; i++) {
PRBool oldb = IS_REPRESENTABLE(aMap, i);
PRBool newb = CCMAP_HAS_CHAR(ccmap, i);
if ((oldb) != (newb)) {
NS_ASSERTION(oldb==newb,"failed to generate map correctly");
}
}
#endif
return ccmap;
}
FcCharSet *
mozilla_decoder_get_charset (PangoFcDecoder *decoder,
PangoFcFont *fcfont)
{
MozillaDecoderPrivate *priv = MOZILLA_DECODER_GET_PRIVATE(decoder);
if (priv->charset)
return priv->charset;
// First time this has been accessed. Populate the charset.
priv->charset = FcCharSetCreate();
if (!gCharsetManager) {
CallGetService(kCharsetConverterManagerCID, &gCharsetManager);
}
nsCOMPtr<nsIUnicodeEncoder> encoder;
nsCOMPtr<nsICharRepresentable> represent;
if (!gCharsetManager)
goto end;
gCharsetManager->GetUnicodeEncoderRaw(priv->encoder, getter_AddRefs(encoder));
if (!encoder)
goto end;
encoder->SetOutputErrorBehavior(encoder->kOnError_Replace, nsnull, '?');
priv->uEncoder = encoder;
represent = do_QueryInterface(encoder);
if (!represent)
goto end;
PRUint32 map[UCS2_MAP_LEN];
memset(map, 0, sizeof(map));
represent->FillInfo(map);
for (int i = 0; i < NUM_UNICODE_CHARS; i++) {
if (IS_REPRESENTABLE(map, i))
FcCharSetAddChar(priv->charset, i);
}
end:
return priv->charset;
}
// Non-BMP unicode support extension, create ccmap for both BMP and extended planes
PRUint16*
MapToCCMapExt(PRUint32* aBmpPlaneMap, PRUint32** aOtherPlaneMaps, PRUint32 aOtherPlaneNum)
{
nsCompressedCharMap* otherPlaneObj[EXTENDED_UNICODE_PLANES];
PRUint32 totalSize;
PRUint16 i;
PRUint32 *planeCCMapOffsets;
PRUint32 currOffset;
NS_ASSERTION(aOtherPlaneNum <= EXTENDED_UNICODE_PLANES, "illegal argument value");
if (aOtherPlaneNum > EXTENDED_UNICODE_PLANES)
return nsnull;
// Put the data into a temp map
nsCompressedCharMap bmpCcmapObj;
bmpCcmapObj.SetChars(aBmpPlaneMap);
// Add bmp size
totalSize = bmpCcmapObj.GetSize();
// Add bmp length field
totalSize += CCMAP_EXTRA;
// Add Plane array
totalSize += EXTENDED_UNICODE_PLANES * sizeof(PRUint32)/sizeof(PRUint16);
// Add an empty plane ccmap
// A totally empty plane ccmap can be represented by 16 *(PRUint16)0.
totalSize += CCMAP_EMPTY_SIZE_PER_INT16;
// Create ccmap for other planes
for (i = 0; i < aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i]) {
otherPlaneObj[i] = new nsCompressedCharMap();
NS_ASSERTION(otherPlaneObj, "unable to create new nsCompressedCharMap");
if(otherPlaneObj) {
otherPlaneObj[i]->SetChars(aOtherPlaneMaps[i]);
totalSize += otherPlaneObj[i]->GetSize();
}
} else {
otherPlaneObj[i] = nsnull;
}
}
PRUint16 *ccmap = (PRUint16*)PR_Malloc(totalSize * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
// Assign BMP ccmap size
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = bmpCcmapObj.GetSize();
CCMAP_FLAG(ccmap) = CCMAP_SURROGATE_FLAG;
// Fill bmp plane ccmap
bmpCcmapObj.FillCCMap(ccmap);
// Get pointer for plane ccmap offset array
currOffset = bmpCcmapObj.GetSize();
planeCCMapOffsets = (PRUint32*)(ccmap+currOffset);
currOffset += sizeof(PRUint32)/sizeof(PRUint16)*EXTENDED_UNICODE_PLANES;
// Put a empty ccmap there
memset(ccmap+currOffset, '\0', sizeof(PRUint16)*16);
PRUint32 emptyCCMapOffset = currOffset;
currOffset += CCMAP_EMPTY_SIZE_PER_INT16;
// Now fill all rest of the planes' ccmap and put off in array
for (i = 0; i <aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i] && otherPlaneObj[i]) {
*(planeCCMapOffsets+i) = currOffset;
otherPlaneObj[i]->FillCCMap(ccmap+currOffset);
currOffset += otherPlaneObj[i]->GetSize();
}
else
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
for (; i < EXTENDED_UNICODE_PLANES; i++) {
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
// remove all nsCompressedCharMap objects allocated
for (i = 0; i < aOtherPlaneNum; i++) {
if (otherPlaneObj[i])
delete otherPlaneObj[i];
}
#ifdef DEBUG
PRUint32 k, h, l, plane, offset;
PRBool oldb;
PRBool newb;
// testing for BMP plane
for (k=0; k<NUM_UNICODE_CHARS; k++) {
oldb = IS_REPRESENTABLE(aBmpPlaneMap, k);
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb,"failed to generate map correctly");
}
//testing for extension plane
for (k = 0x10000; k < 0x100000; k++) {
plane = k/0x10000;
if (plane > aOtherPlaneNum)
break;
if (aOtherPlaneMaps[plane-1])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane-1], k&0xffff);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
// testing for non-BMP plane
for (h = 0; h < 0x400; h++) {
for (l = 0; l < 0x400; l++) {
plane = h >> 6;
offset = (h*0x400 + l) & 0xffff;
if (aOtherPlaneMaps[plane])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane], offset);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT2(ccmap, h+0xd800, l+0xdc00);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
}
#endif
return ccmap;
}
