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https://github.com/MoleskiCoder/EightBit.git
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41 lines
778 B
C++
41 lines
778 B
C++
#pragma once
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#include <cstdint>
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#include <array>
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#include "Bus.h"
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namespace EightBit {
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class CharacterDefinition {
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public:
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CharacterDefinition() {}
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CharacterDefinition(Bus& bus, uint16_t address) {
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for (auto row = 0; row < 8; ++row) {
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auto planeAddress = address + row * 2;
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auto planeLow = bus.peek(planeAddress);
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auto planeHigh = bus.peek(planeAddress + 1);
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for (int bit = 0; bit < 8; ++bit) {
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auto mask = 1 << bit;
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auto bitLow = planeLow & mask ? 1 : 0;
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auto bitHigh = planeHigh & mask ? 0b10 : 0;
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auto colour = bitHigh | bitLow;
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m_definition[row * 8 + (7 - bit)] = colour;
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}
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}
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}
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const std::array<int, 8 * 8>& get() const { return m_definition; }
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private:
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std::array<int, 8 * 8> m_definition;
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};
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} |