//--------------------------------------------------------------------//
// M e t h o d //
// g e n e r a t e I m a g e D a t a //
//--------------------------------------------------------------------//
// //
// Generate ReadImage operator(s) and associated embedded data. //
// //
//--------------------------------------------------------------------//
private static void generateImageData(BinaryWriter prnWriter,
UInt16 srcBitsPerPixel,
Int32 srcWidth,
Int32 srcHeight)
{
const Int32 maxImageBlock = 2048;
const Int32 sizeStd = 64;
Byte[] bufStd = new Byte[sizeStd];
Int32 indStd = 0;
Boolean firstBlock = true,
indexed = true;
Int32 bytesPerRow,
padBytes;
Int32 imageCrntLine,
imageHeight,
imageRowMult,
imageBlockHeight,
imageBlockSize;
//------------------------------------------------------------//
if (srcBitsPerPixel == 1)
{
indexed = true;
bytesPerRow = srcWidth / 8;
if ((srcWidth % 8) != 0)
{
bytesPerRow++;
}
}
else if (srcBitsPerPixel == 4)
{
indexed = true;
bytesPerRow = srcWidth / 2;
if ((srcWidth % 2) != 0)
{
bytesPerRow++;
}
}
else // if (srcBitsPerPixel == 24)
{
indexed = false;
bytesPerRow = srcWidth * 3;
}
padBytes = bytesPerRow % 4;
if (padBytes != 0)
{
padBytes = 4 - padBytes;
bytesPerRow += padBytes;
}
imageCrntLine = 0;
imageHeight = srcHeight;
imageRowMult = (Int32)Math.Floor((Double)maxImageBlock /
(Double)bytesPerRow);
if (imageRowMult == 0)
{
imageRowMult = 1;
}
Byte[] bufSub = new Byte[bytesPerRow];
for (Int32 i = 0; i < imageHeight; i += imageRowMult)
{
if ((imageCrntLine + imageRowMult) >= imageHeight)
{
imageBlockHeight = imageHeight - imageCrntLine;
}
else
{
imageBlockHeight = imageRowMult;
}
imageBlockSize = imageBlockHeight * bytesPerRow;
PCLXLWriter.addAttrUint16(ref bufStd,
ref indStd,
PCLXLAttributes.eTag.StartLine,
(UInt16)imageCrntLine);
PCLXLWriter.addAttrUint16(ref bufStd,
ref indStd,
PCLXLAttributes.eTag.BlockHeight,
(UInt16)imageBlockHeight);
PCLXLWriter.addAttrUbyte(ref bufStd,
ref indStd,
PCLXLAttributes.eTag.CompressMode,
(Byte)PCLXLAttrEnums.eVal.eNoCompression);
PCLXLWriter.addOperator(ref bufStd,
ref indStd,
PCLXLOperators.eTag.ReadImage);
PCLXLWriter.addEmbedDataIntro(ref bufStd,
ref indStd,
imageBlockSize);
prnWriter.Write(bufStd, 0, indStd);
indStd = 0;
for (Int32 j = 0; j < imageRowMult; j++)
{
if ((i + j) >= imageHeight)
{
j = imageRowMult;
}
else
{
ToolImageBitmapCore.getNextImageBlock(ref bufSub,
bytesPerRow,
firstBlock);
// if (srcBitsPerPixel == 24)
if (!indexed)
{
// change BGR components to RGB //
Byte temp;
Int32 endLine = bytesPerRow - 2;
for (Int32 k = 0; k <= endLine; k += 3)
{
if (bufSub[k] != bufSub[k + 2])
{
temp = bufSub[k];
bufSub[k] = bufSub[k + 2];
bufSub[k + 2] = temp;
}
}
}
firstBlock = false;
prnWriter.Write(bufSub, 0, bytesPerRow);
}
}
imageCrntLine += imageBlockHeight;
}
}