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Chapter31-ColorReductionFunctions
}
CIMG_delete_bitmap();
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Chapter32-ASCIIFormatsandFunctions
Chapter 32 - ASCII Formats and Functions
ThischapterdescribesthestructurefordefiningSnowbound’savailableASCIIattributesand
functions.
TheASCIItextformatisnotauto-detectedbydefault.Youmaygeta-7FORMAT_NOT_
ALLOWEDerrorwhentryingtoconverttheASCIItextformat.Toenableauto-detectionofthe
ASCIItextformat,calltheCIMGLOW_
set_
auto_
detect
()
functionwiththefiletypenumberset
to38fortheASCIIfileformatbeforeyougetpagesordecompress.Pleaseseetheexample
below: 
CIMGLOW_set_auto_detect(38)
Thischaptercontainsthefollowingtopics:
ASCII
Attribute
Structure
CIMG_
import_
ascii
()
CIMGLOW_
get_
ascii_
attributes
()
CIMGLOW_
get_
ascii_
page_
width
()
CIMGLOW_
set_
ascii_
attributes
()
ASCII Attribute Structure
BelowisthestructurefordefiningSnowboundASCIIattributes.
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Chapter32-ASCIIFormatsandFunctions
Syntax
Example32.1ASCII Attributes
public class CASCIITEXTATTR
{
public:
int asciiFlags;
int asciiXDpi;
int asciiYDpi;
CIMG_RECT *asciiMargin;
int asciiTabStop;
int asciiPageWidth;
int asciiPageHeight;
int asciiPointSize;
int asciiCharsPerLine;
int asciiLinesPerPage;
int asciiWeight;
int asciiItalic;
String *asciiTypeFace;
CASCIITEXTATTR();
void reset();
};
Remark
Table32.1:publicclassCASCIITEXTATTRVariables
Variable
Default
Description
intasciiFlags
0
Determineswhichfieldstouse
intasciiXDpi
200
Horizontaldotsperinch
intasciiYDpi
200
Verticaldotsperinch
CIMG_RECT*asciiMargin
if (asciiMargin == 0)
asciiMargin = new
CIMG_RECT();
asciiMargin->left =
1000;
asciiMargin->right =
1000; asciiMargin-
>top = 750;
asciiMargin->bottom =
750;
Marginsin1/1000inches
intasciiTabStop
8
Numberofcharactersbetween
tabstops
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Chapter32-ASCIIFormatsandFunctions
Variable
Default
Description
intasciiPageWidth
8500
Widthofpagein1/1000inches
intasciiPageHeight
11000
Heightofpagein1/1000inches
intasciiPointSize
-1
Pointsizeofthefont
intasciiCharsPerLIne
80
Numberofcharactersperline
intasciiLinesPerPage
60
Numberoflinesperpage
intasciiWeight
0
Normal=0
Bold=1
intasciiItalic
0
Normal=0
Italic=1
String*asciiTypeFace
CourierNew
Nameofthefonttouse
Table32.2:ASCIITEXTATTRFunctionFlags
1L<<meansshiftabinarybittotheleftby1position.Essentiallythisis2tothepowerof
howevermanypositionsyoushift.
Addupthevaluesofalloftheflagsyouwanttoturnon,thenyouendupwithahexnumber.
Flag
Description
ASCIIXDPI
(1L<<0)=1
ASCIIYDPI
(1L<<1)=2
ASCIIMARGIN
(1L<<2)=4
ASCIITABSTOP
(1L<<3)=8
ASCIIPAGEWIDTH
(1L<<4)=16
ASCIIPAGEHEIGHT
(1L<<5)=32
ASCIIPOINTSIZE
(1L<<6)=64
ASCIICHARSPERLINE
(1L<<7)=128
ASCIILINESPERPAGE
(1L<<8)=256
ASCIIWEIGHT
(1L<<9)=512
ASCIIITALIC
(1L<<10)=1024
ASCIITYPEFACE
(1L<<11)=2048
BeforeyoucallCIMGLOW_set_ascii_attributes,youneedtosetattr.asciiFlags
toindicatewhichfieldtoupdate.
PleaserefertoTable
32-
2
andthefollowingexamplecodetosetattr.asciiFlagsto
indicate
whichfieldtoupdate:
Example32.2 attr.asciiFlags
attr.asciiFlags = 0xa40;
attr.asciiWeight = 1;
attr.asciiPointSize = 48;
attr.asciiTypeFace = "Arial";
attr.asciiXDpi = maxResolution;
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Chapter32-ASCIIFormatsandFunctions
attr.asciiYDpi = maxResolution;
status = simage.CIMGLOW_set_ascii_attributes(attr);
Table32.3:StandardPageSizes
ASCIIXSIZELETTER
8500L
/*81/2"*/
ASCIIYSIZELETTER
11000L
/*11" */
ASCIIXSIZELEGAL
8500L
/*81/2"*/
ASCIIYSIZELEGAL
14000L
/*14" */
ASCIIXSIZEEXECUTIVE
7250L
/*71/4"*/
ASCIIYSIZEEXECUTIVE
10500L
/*101/2"*/
ASCIIXSIZEENVELOPE
4125L
/*41/8"*/
ASCIIYSIZEENVELOPE
9500L
/*91/2"*/
TogetthepagecountforASCIIfiles,useIMGLOW_set_auto_detect(38)beforegetting
thepagecountordecompressing.
Note:
TogetthepagecountforASCIIfiles,useCIMGLOW_set_auto_detect(38)before
gettingthepagecountordecompressing.PleaseseeCIMGLOW_
set_
auto_
detect
for
moreinformation,
Syntax
PleaserefertoTable
32-
3
andthefollowingexamplecodetosetstandardpagesizes:
Example32.3CIMGLOW_set_auto_detect
simage.CIMGLOW_set_auto_detect(38);
asciiAttr = new CASCIITEXTATTR();
status = simage.CIMGLOW_get_ascii_attributes(asciiAttr);
asciiAttr.asciiFlags = 0x1c3;
asciiAttr.asciiPageWidth = 11000;
asciiAttr.asciiPageHeight = 8300;
asciiAttr.asciiLinesPerPage = 60;
asciiAttr.asciiPointSize = 14;
asciiAttr.asciiXDpi = 200;
asciiAttr.asciiYDpi = 200;
status = simage.CIMGLOW_set_ascii_attributes(asciiAttr);
status = simage.CIMG_decompress_bitmap(fileName);
245
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Chapter32-ASCIIFormatsandFunctions
CIMG_import_ascii()
ThisfunctionreadsandconvertsASCIIdataintoabitmapimage.Tousethisfunction,you
mustturnonASCIIdecompressionusingtheCIMGLOW_
set_
auto_
detect
()
function.
TheASCIItextformatisnotauto-detectedbydefault.Youmaygeta-7FORMAT_NOT_
ALLOWEDerrorwhentryingtoconverttheASCIItextformat.Toenableauto-detectionofthe
ASCIItextformat,calltheCIMGLOW_
set_
auto_
detect
()
functionwiththefiletypenumberset
to38fortheASCIIfileformatbeforeyougetpagesordecompress.Pleaseseetheexample
below:  
CIMGLOW_set_auto_detect(38)
Syntax
int SNBDAPI CIMG_import_ascii(String *filename, int page);
Remark
Table32.4:CIMG_import_asciiFunctionVariables
Variable
Description
filename
Path/filenameoftheASCIIfiletoconvert
page
Pagenumbertostartat
Returns
Returnsthestandardlibraryimagehandle.Avalueof0indicatessuccess.Anyvaluelessthan
zeroisaSnowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralistoferror
codes.
CIMGLOW_get_ascii_attributes()
ThisglobalfunctiongetsthecurrentparametersforCIMG_import_ascii().Itallowsyouto
getthefontmarginsandotherparameterswhenconvertingtheASCIIdatatoabitmap.See
CIMG_
import_
ascii
()
formoreinformation.
Syntax
int SNBDAPI CIMGLOW_get_ascii_attributes(CASCIITEXTATTR *ascii);
Remark
Table32.5:CIMGLOW_get_ascii_attributesFunctionVariable
Variable
Description
ascii
PointertoCASCIITEXTATTRstructure
246
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Chapter32-ASCIIFormatsandFunctions
Returns
ReturnsthepointertoASCIITEXTATTRstructure.Avalueof0indicatessuccess.Anyvalue
lessthanzeroisaSnowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralist
oferrorcodes.
**GLOBALFUNCTION**
CIMGLOW_get_ascii_page_width()
Thisfunctioncalculatestheminimumpagewidthrequiredtomakeabitmapimagefromthe
givenASCIIfile.
Syntax
long SNBDAPI CIMGLOW_get_ascii_page_width(String *filename);
Remark
Table32.6:CIMGLOW_get_ascii_page_widthFunctionVariable
Variable
Description
filename
Path/filenameoftheASCIIfiletoconvert
Returns
Returnsthepath/filenameoftheASCIIfiletoconvert.Avalueof0indicatessuccess.Any
valuelessthanzeroisaSnowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
for
alistoferrorcodes.
CIMGLOW_set_ascii_attributes()
ThisglobalfunctionsetsthecurrentparametersforCIMG_import_ascii().Itallowssetting
thefont,margins,andotherparameterswhenconvertingtheASCIIdatatoabitmap.See
CIMG_
import_
ascii
()
formoreinformation.
Note:
Pleasenotethatthismethodisnotthreadsafe.
Syntax
int SNBDAP CIMGLOW_set_ascii_attributes(CASCIITEXTATTR *ascii);
Remark
Table32.7:CIMGLOW_set_ascii_attributesFunctionVariable
247
Chapter32-ASCIIFormatsandFunctions
Variable
Description
ascii
PointertoCASCIITEXTATTRstructure.Formore
information,seepublic
class
CASCIITEXTATTR
.
Returns
ReturnsthepointertoASCIITEXTATTRstructure.Avalueof0indicatessuccess.Anyvalue
lessthanzeroisaSnowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralist
oferrorcodes.
**GLOBALFUNCTION**
248
Chapter33-FormatForDecompressedImages
Chapter 33 - Format For Decompressed
Images
Thischapterdescribestheformatsfordecompressedimages.Allhigh-levelandlow-level
functionswhichdecompressorimportimagesconvertthedataandstoreitinmemoryasthe
MS-WindowsDIBformat(DeviceIndependentBitmap).
Thechaptercontainsthefollowingtopics:
Overview of Data Formats
Allhigh-levelandlow-levelfunctionsthatdecompressorimportimagesconvertthedataand
storeitinmemoryastheMS_WindowsDIB(DeviceIndependentBitmap)format,which
consistsofthefollowing:
l
Header(DIB_Head)
l
Palette
l
Imagedata
Allformatsareconvertedtoeither1,4,8,or24-bits.All1,4,and8-bitimageshaveapalette.
However,24-bitimagesneverhaveapalette.Therawuncompressedimagedatafollowsthe
palettespecification.
RasterMaster Plus Options
FortheRasterMasterplusoptions,1-bitimagesarestoreddifferently.Theimageformatfor1-
bitimagesisthenormalDIBheader,apaletteconsistingof2RGBQUADstructures,andthenthe
compresseddata.Theimagedataiscompressedandeachrasterisstoredasaseriesofruns.
Eachrunisstoredasa32-bitinteger.Thefirstwordisabytecountoftheentirerasterincluding
thebytecountword.Thisisfollowedbyawhitethenblackcolumn.Thelinealternatesfrom
whitetoblackuntiltheendoftheraster.
Alinealwaysstartswithawhitecolumn.Ifthefirstpixelisblack,thefirstwhiteentryisthen
zero.Thelinemustendwithatleast3entriesforthehorizontalwidth.
Example33.1RasterMasterPlusOptions
Forarasterofwidth100.
WORD 0 - 12 Total byte count.
WORD 1 - 5 White until pixel 5.
WORD 2 - 10 Black from pixel 5 to pixel 10.
WORD 3 - 100 White to end of raster.
249
Chapter33-FormatForDecompressedImages
WORD 4 - 100
WORD 5 - 100
MS_Windows DIBHeader Format
Allimagesstoredinmemorystartwiththefollowingheader.
Example33.2MS_WindowsDIBHeaderFormat
typedef struct tagBITMAPINFOHEADER{
public int biSize;
Size of this structure, always
40.
public int biWidth;
Width of the image in pixels.
public int biHeight;
Height of the image in pixels.
public short biPlanes;
Always 1. (as per Microsoft)
public short biBitCount;
Bits per pixel 1,4,8 or 24.
public int biCompression;
0 or 99 for 1 bit runs images.
public int biSizeImage;
Height of the image X size of a
raster in bytes.
public int biXPelsPerMeter;
Use this field to store dots
per inch.
public int biYPelsPerMeter;
Use this field to store dots
per inch.
public int biClrUsed;
Always set to 0.
public int biClrImportant;
Always set to 0.
}BITMAPINFOHEADER;
Note:
InRasterMaster.NETV17.6,thepelsPerMeterattributequeriesreturntheactualvalue
containedintheattribute.Inpreviousversions,thebi{X/Y}PelsPerMeterwouldreturna
defaultvalueof100ifthevaluewasnotsetintheimage.Thismethodresultedinthere
beingnowaytotellifRasterMaster.NETwasreturningthedefaultvalueortheactual
valuethatwasset.BeginningwithRasterMaster.NETV17.6,itwillreturntheactual
valueevenifitis0.Ifyouwanttopreservethepreviousbehavior,youcanaddacheck
toseeifthebi{X/Y}pelsPerMeterattributeisvaluedat0.Ifitisvaluedat0,replaceit
with100.
MS_Windows DIBPalette Format
Allimagesstoredinmemoryexceptfor24-bitimageshaveaseriesofthefollowingRGBQUAD
structures.AnRGBQUADstructureexistsforeachpossiblecolor.
250
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