48 lines
1004 B
C
48 lines
1004 B
C
#define GINT_NEED_VRAM
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#include <gint/defs/util.h>
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#include <gint/display.h>
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#include <display/fx.h>
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/* drect() - fill a rectangle of the screen */
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void drect(int x1, int y1, int x2, int y2, color_t 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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/* Argument checking */
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if(x1 >= 128 || x2 < 0 || y1 >= 64 || y2 < 0) return;
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if(x1 < 0) x1 = 0;
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if(x2 >= 128) x2 = 127;
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if(y1 < 0) y1 = 0;
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if(y2 >= 64) y2 = 63;
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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 = vram + (y1 << 2);
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uint32_t *lword = vram + (y2 << 2) + 4;
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if(color == color_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 == color_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 == color_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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