51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <gint/defs/util.h>
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#include <gint/display.h>
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#include "../render/render.h"
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#include "render-fx.h"
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void drect(int x1, int y1, int x2, int y2, int color)
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{
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if(x1 > x2) swap(x1, x2);
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if(y1 > y2) swap(y1, y2);
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/* Rectangle is completely outside the rendering window */
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if(x1 >= dwindow.right || x2 < dwindow.left) return;
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if(y1 >= dwindow.bottom || y2 < dwindow.top) return;
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/* Clipping */
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x1 = max(x1, dwindow.left);
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x2 = min(x2, dwindow.right - 1);
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y1 = max(y1, dwindow.top);
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y2 = min(y2, dwindow.bottom - 1);
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DMODE_OVERRIDE(drect, x1, y1, x2, y2, color);
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/* Use masks to get the work done fast! */
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uint32_t m[4];
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masks(x1, x2, m);
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uint32_t *base = gint_vram + (y1 << 2);
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uint32_t *lword = gint_vram + (y2 << 2) + 4;
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if(color == C_WHITE) while(lword > base)
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{
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*--lword &= ~m[3];
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*--lword &= ~m[2];
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*--lword &= ~m[1];
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*--lword &= ~m[0];
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}
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else if(color == C_BLACK) while(lword > base)
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{
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*--lword |= m[3];
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*--lword |= m[2];
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*--lword |= m[1];
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*--lword |= m[0];
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}
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else if(color == C_INVERT) while(lword > base)
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{
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*--lword ^= m[3];
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*--lword ^= m[2];
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*--lword ^= m[1];
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*--lword ^= m[0];
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}
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}
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