Figure 122 Logical Screen/Image Relationship in .NET

Printer QR-Code in .NET Figure 122 Logical Screen/Image Relationship
Figure 122 Logical Screen/Image Relationship
QR Code Creator In .NET Framework
Using Barcode generator for .NET Control to generate, create QR Code image in VS .NET applications.
Images
Scanning QR Code In .NET Framework
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications.
Logical Screen
Bar Code Generator In VS .NET
Using Barcode creation for .NET Control to generate, create barcode image in VS .NET applications.
wwwvsoftsnet oldroad
Decoding Bar Code In VS .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
Table 123 Color Table Entry Format
Creating Denso QR Bar Code In Visual C#
Using Barcode generation for .NET Control to generate, create Quick Response Code image in .NET framework applications.
Field Name
Quick Response Code Drawer In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
Red Green Blue
Generating QR Code JIS X 0510 In Visual Basic .NET
Using Barcode printer for .NET Control to generate, create Denso QR Bar Code image in VS .NET applications.
Size 1 byte 1 byte 1 byte
Barcode Creator In .NET Framework
Using Barcode creation for .NET framework Control to generate, create barcode image in .NET applications.
Description Red component value Green component value Blue component value
EAN 128 Creator In .NET Framework
Using Barcode encoder for .NET Control to generate, create EAN 128 image in Visual Studio .NET applications.
Table 124 Block Codes
Code-39 Generator In .NET
Using Barcode drawer for VS .NET Control to generate, create Code-39 image in .NET framework applications.
Code
Drawing EAN 13 In .NET
Using Barcode creation for .NET Control to generate, create GTIN - 13 image in .NET applications.
2116 2C16 3B16
2 Of 5 Standard Maker In VS .NET
Using Barcode maker for .NET Control to generate, create 2/5 Standard image in .NET framework applications.
Type Extension Image block GIF terminator
ANSI/AIM Code 39 Generation In VB.NET
Using Barcode creation for .NET Control to generate, create Code 3/9 image in .NET applications.
color table reduces the file size and makes it easier for systems that can display a limited number of colors In addition, the global color table specifies the background color for the logical screen If the global color table bit is set in the screen descriptor, the global color table immediately follows the screen descriptor The global color table is an array of structures whose format is shown in Table 123 The number of entries in the array is determined from the Global Color Table Size field in the screen descriptor Block Types After the global color table, the variable part of the GIF file begins The file contains a sequence of blocks that are identified by a 1-byte code at the start of the block Table 124 lists the block types and the associated block code Terminator The terminator block marks the end of the GIF file This block is 1 byte long and consists solely of the block code Image Block An image block defines an image within the GIF file The image starts with an image header structure that defines its size and placement The format of this structure is given in Table 125 If the Local Color Table flag in the image header is set, the image uses a local color table rather than the global color table Just like the global color table, the local color table is an array of color entries (Table 123) The number of elements in the array is determined from the Local Color Table Size field in the header Figure 123 shows the general layout of an image definition within a GIF file
EAN 13 Creation In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create GTIN - 13 image in ASP.NET applications.
oldroad
Painting UPC-A In Java
Using Barcode encoder for Java Control to generate, create UPC-A image in Java applications.
Figure 123 Image Definition Structure
Paint Bar Code In Visual C#
Using Barcode generator for VS .NET Control to generate, create bar code image in .NET framework applications.
wwwvsoftsnet
Data Matrix Creator In Java
Using Barcode maker for Java Control to generate, create Data Matrix image in Java applications.
File Structure
Barcode Creator In Java
Using Barcode creation for Java Control to generate, create bar code image in Java applications.
Table 125 Image Header Structure
Data Matrix Scanner In .NET Framework
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
Field Name Left Position Right Position Image Width Image Height Bit Field Local Color Table Size Reserved Sort Flag Interlace Flag Local Color Table Flag
Paint Bar Code In VB.NET
Using Barcode creation for VS .NET Control to generate, create bar code image in .NET applications.
Size 2 bytes 2 bytes 2 bytes 2 bytes 1 byte Bits 0-2 Bits 3-4 Bit 5
Bit 6 Bit 7
Description Left offset of the image within the logical screen Top offset of the image within the logical screen
(N+1)2 is the number of entries in the local color table Unused If set, the colors in the local color table are sorted in order of importance If set, the image data is interlaced If set the image uses a local color table
The colortable (or the image header if there is no color table) is followed by one byte that contains the initial code size used in the compressed data The value in this field is usually 8 Data Blocks The code size byte is immediately followed by an uninterrupted series of data blocks that contain the compressed image data A data block consists of a 1-byte count field, followed by 1 to 255 data bytes The chain of data blocks for an image is always terminated by a data block with zero data bytes in other words, a single zero-valued byte We will postpone the discussion of the compressed block format until later in the chapter Extension Blocks Extension blocks were added to GIF in the GIF89a specification The layout of an extension block is shown in Figure 124 The first byte in the extension block contains the code 2116 This is followed by a second byte that contains a code that specifies the extension type The extension type codes are listed in Table 126 The format of the extension header is specific to the extension type The first byte in the header gives the size of the header not including the size byte The header is followed by a list of data blocks Each block consists of a count byte followed by 1 to 255 data bytes The list of data blocks is terminated by a zero byte (data block with zero data bytes) The structure of the extension blocks is such that an application can skip over them without having to understand the structure of each individual extension type Algorithm 121 illustrates how to skip over an extension