mirror of https://github.com/pret/pokeemerald.git
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
#ifndef GUARD_SCANLINE_EFFECT_H
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#define GUARD_SCANLINE_EFFECT_H
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// DMA control value to transfer a single 16-bit value at HBlank
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#define SCANLINE_EFFECT_DMACNT_16BIT (((DMA_ENABLE | DMA_START_HBLANK | DMA_REPEAT | DMA_SRC_INC | DMA_DEST_INC | DMA_16BIT | DMA_DEST_RELOAD) << 16) | 1)
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#define SCANLINE_EFFECT_REG_BG0HOFS (REG_ADDR_BG0HOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG0VOFS (REG_ADDR_BG0VOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG1HOFS (REG_ADDR_BG1HOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG1VOFS (REG_ADDR_BG1VOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG2HOFS (REG_ADDR_BG2HOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG2VOFS (REG_ADDR_BG2VOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG3HOFS (REG_ADDR_BG3HOFS - REG_ADDR_BG0HOFS)
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#define SCANLINE_EFFECT_REG_BG3VOFS (REG_ADDR_BG3VOFS - REG_ADDR_BG0HOFS)
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struct ScanlineEffectParams
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{
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volatile void *dmaDest;
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u32 dmaControl;
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u8 initState;
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u8 unused9;
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};
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struct ScanlineEffect
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{
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void *dmaSrcBuffers[2];
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volatile void *dmaDest;
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u32 dmaControl;
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void (*setFirstScanlineReg)(void);
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u8 srcBuffer;
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u8 state;
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u8 unused16;
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u8 unused17;
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u8 waveTaskId;
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};
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extern struct ScanlineEffect gScanlineEffect;
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extern u16 gScanlineEffectRegBuffers[2][0x3C0];
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void ScanlineEffect_Stop(void);
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void ScanlineEffect_Clear(void);
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void ScanlineEffect_SetParams(struct ScanlineEffectParams);
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void ScanlineEffect_InitHBlankDmaTransfer(void);
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u8 ScanlineEffect_InitWave(u8 startLine, u8 endLine, u8 frequency, u8 amplitude, u8 delayInterval, u8 regOffset, bool8 a7);
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#endif // GUARD_SCANLINE_EFFECT_H
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