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https://github.com/isometimes/rpi4-osdev
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50 lines
944 B
C
50 lines
944 B
C
#include "wgt.h"
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void wvertres (short x, short y, short y2, block image)
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{
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short width,height,base,yy,temp;
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int fy,ctr2;
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int same2,incr2;
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width = wgetblockwidth (image);
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height = wgetblockheight (image); /* store width and height */
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if (y > y2) /* swap y's if needed */
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{
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temp = y;
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y = y2;
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y2 = temp;
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}
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incr2 = (y2 - y + 1) * (2000 / height);
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/* find increment */
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fy = y2;
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yy = y;
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ctr2 = 0;
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same2 = 0;
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base = 0;
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while (yy <= fy)
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{
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if (incr2 >= 2000)
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while ((same2 - ctr2 > 999) & (yy < fy))
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{
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memcpy (&abuf[(yy)*WGT_SYS.xres + x], &image[(base)*width + 2], width);
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yy ++;
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ctr2 += 2000;
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}
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else
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while (same2 < ctr2)
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{
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same2 += incr2;
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base ++;
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}
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if (yy < fy)
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memcpy (&abuf[(yy)*WGT_SYS.xres + x], &image[(base)*width + 2], width);
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same2 += incr2;
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ctr2 += 2000;
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base ++;
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yy ++;
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}
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}
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