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Clément Le Bihan
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
//
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// Created by cbihan on 1/27/20.
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//
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#ifndef COMSQUARE_PPU_UTILS_HPP
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#define COMSQUARE_PPU_UTILS_HPP
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#include <stdint-gcc.h>
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namespace ComSquare::PPU
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{
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//! @brief Used to parse easily VRAM Tile information
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union TileMapData {
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struct {
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//! @brief Tile X offset
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uint16_t posX: 4;
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//! @brief Tile Y offset
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uint16_t posY: 6;
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//! @brief Palette number used by the Tile
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uint16_t palette: 3;
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//! @brief True if the Tile has priority
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uint16_t tilePriority: 1;
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//! @brief True if the Tile need to be horizontally flipped
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uint16_t horizontalFlip: 1;
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//! @brief True if the Tile need to be vertically flipped
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uint16_t verticalFlip: 1;
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};
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uint16_t raw = 0;
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};
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//! @brief Struct to save all specific variables needed for the registers (prev values for example)
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struct PpuState {
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//! @brief Used by by all eight BGnxOFS registers (0x210D - 0x2114)
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uint8_t hvSharedScrollPrevValue;
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//! @brief Shared by the four BGnHOFS registers
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uint8_t hScrollPrevValue;
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};
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}
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#endif //COMSQUARE_PPU_UTILS_HPP
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