103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/* ------------------------------------------------------------------------
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System : Manx Aztec C65 Version 3.2b
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MS-DOS cross-development environment
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Platform : Apple IIe 128K PRODOS 8
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Program : dhrfont.c
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Description : G2 Library Routine
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Double Hi-Res 140 x 192 x 16 color font routine
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Written by : Bill Buckels
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Date Written : January 2013
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Revision : 1.0 First Release
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Licence : You may use this code for whatever you wish as long
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as you agree that Bill Buckels has no warranty or
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liability obligations whatsoever from said use.
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------------------------------------------------------------------------ */
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extern char __chr[1096];
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int msk7[]={0x1,0x2,0x4,0x8,0x10,0x20,0x40};
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int dhrfont(str,row,col,fg,bg,scale,pitch,justify)
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char *str;
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int row,col,fg,bg,scale,pitch;
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char justify;
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{
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int target, scanline, offset, r, r2, c, d, byte, nibble, x, spaces = 0;
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unsigned char ch;
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if (scale > 2)scale = 1;
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if (pitch != 6)pitch = 7;
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target = strlen(str);
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for (byte=0;byte<target;byte++) {
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d = str[byte]&0x7f;
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if (d < 32)d = 32;
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if (d == 32 || d == 'l' || d == '1' || d == '.' || d == '!')spaces +=1;
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}
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if (justify == 'm' || justify == 'M') {
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offset = ((target * pitch)- spaces)/2;
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col = col - offset;
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}
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for(scanline=0;scanline<8;scanline++)
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{
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/* set values for vertical term */
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/* expand x scale in the vertical direction */
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r = (scanline * scale) + row; /* max 16 high */
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if (r > 191)break;
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r2 = r + 1;
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/* run the string 8 times
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if scale = 2 then print a double line
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each time which gives us a font of 16 high */
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spaces = 0;
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for (byte=0;byte<target;byte++)
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{
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/* calculate the starting column for each
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run in the width of 6 or 7 pixels */
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c = ((byte * pitch) + col)-spaces;
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if (c > 139)continue;
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d = str[byte]&0x7f;
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if (d < 32)d = 32;
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if (d == 32 || d == 'l' || d == '1'|| d == '.'||d == '!')spaces +=1;
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if (d == 32 && bg < 0)continue;
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offset = ((d-32) * 8) + scanline;
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ch = __chr[offset];
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if (ch == 0 && bg < 0)continue;
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for (nibble=0;nibble<pitch;nibble++)
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{
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x = c+nibble;
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if (x > 139)break;
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if (ch & msk7[nibble]){
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if (scale > 1 && r2 < 192)
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dhrvline(x,r,r2,fg);
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else
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dhrvline(x,r,r,fg);
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}
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else {
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if (bg < 0)continue;
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if (scale > 1 && r2 < 192)
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dhrvline(x,r,r2,bg);
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else
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dhrvline(x,r,r,bg);
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}
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}
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}
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}
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return 0;
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}
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