forked from Lephenixnoir/gint
22 lines
466 B
C
22 lines
466 B
C
#include <display_internals.h>
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#include <display.h>
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/*
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dclear_area()
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Clears an area of the vram using rectangle masks. Both (x1, y1) and
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(x2, y2) are cleared.
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*/
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void dclear_area(int x1, int y1, int x2, int y2)
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{
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unsigned int masks[4];
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adjustRectangle(&x1, &y1, &x2, &y2);
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getMasks(x1, x2, masks);
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int begin = y1 << 2;
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int end = (y2 + 1) << 2;
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int i;
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for(i = 0; i < 4; i++) masks[i] = ~masks[i];
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for(i = begin; i < end; i++) vram[i] &= masks[i & 3];
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}
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