Difference between revisions of "SaveIcon32"

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SaveIcon32 img&, size&, SaveFile$
 
SaveIcon32 img&, size&, SaveFile$
  
{{Cl|END}}
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{{Cl|END}}  
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'            ---------------------------------------------------------
  
 
{{Cl|SUB}} SaveIcon32 (image {{Cl|AS}} {{Cl|LONG}}, size {{Cl|AS}} {{Cl|LONG}}, filename {{Cl|AS}} {{Cl|STRING}})
 
{{Cl|SUB}} SaveIcon32 (image {{Cl|AS}} {{Cl|LONG}}, size {{Cl|AS}} {{Cl|LONG}}, filename {{Cl|AS}} {{Cl|STRING}})

Revision as of 20:36, 6 November 2011

The following Icon creation procedure was adapted from Galleon's SAVEIMAGE sup-procedure that creates 8 BPP or 32 bit bitmaps:

DO LINE INPUT "Use 8 bit(256 colors) or 32 bit image? ", bit$ mode% = VAL(bit$) LOOP UNTIL mode% = 8 OR mode% = 32 IF mode% = 8 THEN mode% = 256 SCREEN _NEWIMAGE(640, 480, mode%) DO LOCATE 10, 10: LINE INPUT "Enter the icon size to use(multiple of 16): ", sz$ size& = VAL(sz$) LOOP UNTIL size& MOD 16 = 0 AND size& >= 16 AND size& <= 128 DO LOCATE 10, 10: LINE INPUT "Enter the image file name to convert to an icon: ", BMP$ CLS LOOP UNTIL _FILEEXISTS(BMP$) img& = _LOADIMAGE(BMP$) IF img& = -1 OR img& = 0 THEN LOCATE 15, 25: PRINT "Image failed to load!": END CLS , _RGB(255, 255, 255) IF mode% = 256 THEN _COPYPALETTE (img&) _PUTIMAGE (0, 0)-(size& - 1, size& - 1), img&, 0 '(31, 31), img&, 0 '<<<<<<<<<<< LOCATE 20, 10: PRINT "Do you want to make an icon out of the image? (Y/N)" K$ = INPUT$(1) IF UCASE$(K$) <> "Y" THEN END SaveFile$ = LEFT$(BMP$, INSTR(BMP$, ".")) + "ico" SaveIcon32 img&, size&, SaveFile$ END ' --------------------------------------------------------- SUB SaveIcon32 (image AS LONG, size AS LONG, filename AS STRING) bytesperpixel& = _PIXELSIZE(image&) IF bytesperpixel& = 0 THEN PRINT "Text modes unsupported!": END IF bytesperpixel& = 1 THEN bpp& = 8: bp% = 1 ELSE bpp& = 24: bp% = 3 x& = size& 'not to exceed 128! y& = size& 'Icon, Entry & BMP headers: width depth colors byte size - offset b$= MKI$(0)+MKI$(1)+MKI$(1)+CHR$(x&)+CHR$(y&)+CHR$(0)+CHR$(0)+MKI$(0)+MKI$(0)+"????"+MKL$(22) _ +MKL$(40)+MKL$(x&)+MKL$(2 * y&)+MKI$(1)+MKI$(bpp&)+MKL$(0)+"????"+MKL$(0)+MKL$(0)+MKL$(0)+MKL$(0) 'BMP size double * height plane BPP raw size IF bytesperpixel& = 1 THEN FOR c& = 0 TO 255 ' read BGR color settings from image + 1 byte spacer(CHR$(0)) cv& = _PALETTECOLOR(c&, image&) ' color attribute to read. b$ = b$ + CHR$(_BLUE32(cv&)) + CHR$(_GREEN32(cv&)) + CHR$(_RED32(cv&)) + CHR$(0) 'spacer byte NEXT END IF lastsource& = _SOURCE _SOURCE 0 IF (x& MOD 32) THEN pad& = 32 - (x& MOD 32) 'not used in 32 X 32 multiples FOR py& = y& - 1 TO 0 STEP -1 ' read JPG image pixel color data r$ = "" FOR px& = 0 TO x& - 1 c& = POINT(px&, py&) IF bytesperpixel& = 1 THEN r$ = r$ + CHR$(c&) ELSE r$ = r$ + LEFT$(MKL$(c&), 3) NEXT px& d$ = d$ + r$ NEXT py& a$ = STRING$(bp% * y& * (x& + pad&) \ 8, 0) 'totally black AND mask d$ = d$ + a$ _SOURCE lastsource& MID$(b$, 43, 4) = MKL$(LEN(d$)) 'raw image size with AND mask b$ = b$ + d$ ' total file data bytes to create file MID$(b$, 15, 4) = MKL$(LEN(b$) - 22) ' size of data file minus Entry header offset IF LCASE$(RIGHT$(filename$, 4)) <> ".ico" THEN ext$ = ".ico" f& = FREEFILE OPEN filename$ + ext$ FOR OUTPUT AS #f&: CLOSE #f& ' erases an existing file OPEN filename$ + ext$ FOR BINARY AS #f& PUT #f&, , b$ CLOSE #f& END SUB

Code by Ted Weissgerber
Explanation: The icons created only have a black AND mask for simplicity so the background is changed to white using CLS.
SPACE$(2) gives the icon entry header the 32 X 32 dimensions as spaces are CHR$(32). Smaller icons would require padding.
In the header, ???? is later replaced with size data. If the image is 24/32 BPP, the size of the image data will triple with bp%.
Note: Icon sizes that are not multiples of 32 require AND mask padding to multiples of 4 bytes!

IF Width MOD 32 THEN ANDpad% = 32 - (Width MOD 32)


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