Zack Buhman
30092b9b15
I might later question this decision. I liked how each "hardware" example was roughly one self-contained file. In the "input_keyboard" case, this is no longer true.
27 lines
551 B
C++
27 lines
551 B
C++
#include <stdint.h>
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#include "vdp2.h"
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#include "palette.hpp"
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constexpr inline uint16_t rgb15_gray(uint32_t intensity)
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{
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return ((intensity & 31) << 10) // blue
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| ((intensity & 31) << 5 ) // green
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| ((intensity & 31) << 0 ); // red
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}
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namespace palette {
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void vdp2_cram_32grays(uint32_t colors_per_palette, uint32_t color_bank_index)
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{
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/* generate a palette of 32 grays */
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uint16_t * table = &vdp2.cram.u16[colors_per_palette * color_bank_index];
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for (uint32_t i = 0; i <= 31; i++) {
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table[i] = rgb15_gray(i);
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}
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}
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}
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