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42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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#pragma once
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#include <cstdint>
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#include <Bus.h>
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#include <Processor.h>
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namespace EightBit {
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namespace GameBoy {
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class ObjectAttribute {
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public:
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ObjectAttribute() {}
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ObjectAttribute(Bus& bus, uint16_t address, int height) {
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m_positionY = bus.peek(address);
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m_positionX = bus.peek(address + 1);
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m_pattern = bus.peek(address + 2);
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if (height == 16)
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m_pattern >>= 1;
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m_flags = bus.peek(address + 3);
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}
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uint8_t positionY() const { return m_positionY; }
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uint8_t positionX() const { return m_positionX; }
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uint8_t pattern() const { return m_pattern; }
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uint8_t flags() const { return m_flags; }
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uint8_t priority() const { return flags() & Processor::Bit7; }
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bool highPriority() const { return priority() != 0; }
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bool lowPriority() const { return priority() == 0; }
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bool flipY() const { return (flags() & Processor::Bit6) != 0; }
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bool flipX() const { return (flags() & Processor::Bit5) != 0; }
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int palette() const { return (flags() & Processor::Bit4) >> 3; }
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private:
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uint8_t m_positionY;
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uint8_t m_positionX;
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uint8_t m_pattern;
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uint8_t m_flags;
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};
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}
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}
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