[CLSCompliantAttribute(false)]
public int SetRowColumnCompressed(
byte[] workBuffer,
ushort[] runBuffer,
int runBufferOffset,
int row,
int column,
int width
)
- (NSInteger)setRowColumnCompressed:(unsigned char *)workBuffer
runBuffer:(const unsigned short *)runBuffer
row:(NSInteger)row
column:(NSInteger)column
width:(NSUInteger)pixels
error:(NSError **)error
public int setRowColumnCompressed(
byte[] workBuffer,
short[] runBuffer,
int runBufferOffset,
int row,
int column,
int width
)
[CLSCompliantAttribute(false)]
public:
int SetRowColumnCompressed(
array<byte>^ workBuffer,
array<ushort>^ runBuffer,
int runBufferOffset,
int row,
int column,
int width
)
def SetRowColumnCompressed(self,workBuffer,runBuffer,runBufferOffset,row,column,width):
workBuffer
Optional work buffer. Allocating the work buffer speeds processing if you call this method more than once, because if you do not allocate a work buffer, the method allocates and frees a temporary buffer each time it is called. The size of this buffer should be the same as the image's BytesPerLine property. Pass a null reference to runBuffer if you do not want to use a work buffer.
runBuffer
Input buffer, which contains 1-bit compressed image data.
runBufferOffset
Offset into runBuffer where the set operation should start.
row
The number of the row to update. The first row is 0, and the last row is 1 less than the image height.
column
The column offset within the row to update. The first column offset is 0, and the last column offset is 1 less than the image width.
width
The number of pixels to retrieve.
The number of pixels processed.
This method is available in the (Document/Medical only) Toolkits.
This method is useful for working with 1-bit images that are loaded in their compressed formats for faster loading and display.
For more information, refer to Speeding Up 1-Bit Documents.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using Leadtools.Svg;
public void GetRowColumnCompressedExample()
{
RasterCodecs codecs = new RasterCodecs();
// Load the bitmap, at 1 bit per pixel, compressed
codecs.Options.Load.Compressed = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "OCR1.TIF"), 1, Leadtools.Codecs.CodecsLoadByteOrder.Bgr, 1, 1);
int xOffset; // Column offset of the rectangle to process.
int xSize; // Pixel width of the rectangle to process.
int yOffset; // Row offset of the rectangle to process.
int ySize; // Pixel height of the rectangle to process.
int i, n; // Counters.
byte[] buffer; // Buffer to hold the expanded row.
ushort[] runBuffer; // Buffer to hold the compressed row.
byte[] workBuffer; // Work buffer.
// This example does not work with rotated view perspectives.
if ((image.ViewPerspective != RasterViewPerspective.TopLeft) || (image.ViewPerspective != RasterViewPerspective.BottomLeft))
image.ChangeViewPerspective(RasterViewPerspective.TopLeft);
// Specify a rectangle in the middle right part of the displayed image.
xOffset = image.Width / 3;
xSize = image.Width - xOffset;
yOffset = image.Height / 3;
ySize = image.Height / 3;
// Adjust the YOffset if the view perspective is bottom left.
if (image.ViewPerspective == RasterViewPerspective.BottomLeft)
{
yOffset = image.Height - yOffset - ySize;
}
if (image.IsGlobalMemory)
image.Access();
// Allocate the buffers.
buffer = new Byte[(xSize + 7) / 8];
runBuffer = new ushort[(xSize + 3) * 2];
workBuffer = new Byte[image.BytesPerLine];
// Invert the colors of pixels in the left half of the rectangle.
// Notice that we get the whole rectangle, but process only half of it.
for (i = yOffset; i < (yOffset + ySize); i++)
{
image.GetRowColumnCompressed(workBuffer, runBuffer, 0, i, xOffset, xSize);
RasterRleCompressor.ExpandRow(runBuffer, buffer, 0, 0, xSize);
for (n = 0; n < (xSize / 16); n++)
buffer[n] ^= 0xFF;
RasterRleCompressor.CompressRow(runBuffer, buffer, 0, 0, xSize);
image.SetRowColumnCompressed(workBuffer, runBuffer, 0, i, xOffset, xSize);
}
if (image.IsGlobalMemory)
image.Release();
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1_getrowcolcompresed.BMP"), RasterImageFormat.Bmp, 0);
image.Dispose();
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
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