forked from Lephenixnoir/gint
26 lines
647 B
C
26 lines
647 B
C
#include <internals/display.h>
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#include <display.h>
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/*
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dpixel()
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Changes a pixel's color in the video ram. The result may depend on the
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current color of the pixel.
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*/
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void dpixel(size_t x, size_t y, color_t operator)
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{
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// Let's be honest, all this module's code *heavily* relies on the
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// screen dimension in the end, so it's not that big a deal.
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if(x > 127 || y > 63) return;
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uint32_t *video = vram + (y << 2) + (x >> 5);
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uint32_t mask = 0x80000000 >> (x & 31);
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switch(operator)
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{
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case color_white: *video &= ~mask; break;
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case color_black: *video |= mask; break;
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case color_invert: *video ^= mask; break;
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default: return;
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}
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}
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