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35 lines
805 B
C++
35 lines
805 B
C++
#include "stdafx.h"
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#include "../inc/CharacterDefinition.h"
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#include <Ram.h>
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EightBit::GameBoy::CharacterDefinition::CharacterDefinition(Ram& vram, const uint16_t address) noexcept
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: m_vram(vram),
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m_address(address) {
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}
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std::array<int, 8> EightBit::GameBoy::CharacterDefinition::get(int row) const noexcept {
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std::array<int, 8> returned;
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const auto planeAddress = m_address + row * 2;
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const auto planeLow = m_vram.peek(planeAddress);
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const auto planeHigh = m_vram.peek(planeAddress + 1);
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for (int bit = 0; bit < 8; ++bit) {
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const auto mask = Chip::bit(bit);
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const auto bitLow = planeLow & mask ? 1 : 0;
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const auto bitHigh = planeHigh & mask ? 0b10 : 0;
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const auto colour = bitHigh | bitLow;
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const auto index = 7 - bit;
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returned[index] = colour;
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}
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return returned;
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}
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