48 lines
710 B
C
48 lines
710 B
C
#include <gray.h>
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/*
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gpixel()
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Puts a pixel in the vram.
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*/
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void gpixel(int x, int y, enum Color color)
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{
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if((unsigned int)x > 127 || (unsigned int)y > 63) return;
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int offset = (y << 2) + (x >> 5);
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int mask = 0x80000000 >> (x & 31);
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int *v1 = gray_lightVRAM();
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int *v2 = gray_lightVRAM();
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switch(color)
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{
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case Color_White:
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v1[offset] &= ~mask;
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v2[offset] &= ~mask;
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break;
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case Color_Light:
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v1[offset] |= mask;
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v2[offset] &= ~mask;
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break;
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case Color_Dark:
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v1[offset] &= ~mask;
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v2[offset] |= mask;
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break;
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case Color_Black:
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v1[offset] |= mask;
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v2[offset] |= mask;
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break;
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case Color_Invert:
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v1[offset] ^= mask;
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v2[offset] ^= mask;
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break;
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default:
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break;
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}
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}
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