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/* $Id: shiroi_video_mk_i.c 19 2024-08-29 07:16:04Z nishi $ */
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#include "shiroi_video_mk_i.h"
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#include "shiroi.h"
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#include "tms9918util.h"
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#include <stdlib.h>
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void shiroi_video_mk_i_install(shiroi_t* shiroi, int slot) {
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	shiroi->cards[slot].type = SHIROI_VIDEO_MARK_I;
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	shiroi->cards[slot].videoptr = &shiroi->cards[slot].video;
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	shiroi->cards[slot].video.width = TMS9918_PIXELS_X;
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	shiroi->cards[slot].video.height = TMS9918_PIXELS_Y;
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	shiroi->cards[slot].video.tick = 0;
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	shiroi->cards[slot].video.vdp = vrEmuTms9918New();
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	int x, y;
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	for(y = 0; y < TMS9918_PIXELS_Y; y++) {
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		for(x = 0; x < TMS9918_PIXELS_X; x++) {
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			shiroi->cards[slot].video.fb[y * TMS9918_PIXELS_X + x] = 0;
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		}
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	}
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}
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void shiroi_video_mk_i_reset(shiroi_t* shiroi, int slot) {
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	vrEmuTms9918Reset(shiroi->cards[slot].video.vdp);
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	shiroi->cards[slot].video.tick = 0;
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	int y, x;
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	for(y = 0; y < shiroi->cards[slot].video.height; y++) {
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		for(x = 0; x < shiroi->cards[slot].video.width; x++) {
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			shiroi->cards[slot].video.fb[y * shiroi->cards[slot].video.width + x] = 0x000000ff;
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		}
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	}
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	int i;
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	int addr;
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	addr = 0 | 0x4000;
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	vrEmuTms9918WriteAddr(shiroi->cards[slot].video.vdp, (addr & 0xff00) >> 8);
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	vrEmuTms9918WriteAddr(shiroi->cards[slot].video.vdp, (addr & 0xff));
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	for(i = 0; i < 0xffff; i++) {
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		vrEmuTms9918WriteData(shiroi->cards[slot].video.vdp, 0);
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	}
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}
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void shiroi_video_mk_i(shiroi_t* shiroi) {
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	int i;
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	uint16_t io = Z80_GET_ADDR(shiroi->z80_pins);
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	uint16_t addr = io & 0xff;
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	uint16_t data = (io >> 8) & 0xff;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == SHIROI_VIDEO_MARK_I) {
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			if(shiroi->z80_pins & Z80_RD) {
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				/* I/O Read */
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				if(addr == 1) {
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					Z80_SET_DATA(shiroi->z80_pins, vrEmuTms9918ReadData(shiroi->cards[i].video.vdp));
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				} else if(addr == 2) {
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					Z80_SET_DATA(shiroi->z80_pins, shiroi->cards[i].type);
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				}
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			} else if(shiroi->z80_pins & Z80_WR) {
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				/* I/O Write */
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				if(addr == 0) {
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					vrEmuTms9918WriteAddr(shiroi->cards[i].video.vdp, data);
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				} else if(addr == 1) {
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					vrEmuTms9918WriteData(shiroi->cards[i].video.vdp, data);
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				}
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			}
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		}
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	}
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}
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void shiroi_video_mk_i_tick(shiroi_t* shiroi) {
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	uint8_t scanline[TMS9918_PIXELS_X];
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	int i, y, x;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == SHIROI_VIDEO_MARK_I) {
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			shiroi->cards[i].video.tick++;
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			if(shiroi->cards[i].video.tick == 1024) {
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				shiroi->cards[i].video.tick = 0;
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				for(y = 0; y < TMS9918_PIXELS_Y; y++) {
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					vrEmuTms9918ScanLine(shiroi->cards[i].video.vdp, y, scanline);
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					for(x = 0; x < TMS9918_PIXELS_X; x++) {
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						shiroi->cards[i].video.fb[y * TMS9918_PIXELS_X + x] = vrEmuTms9918Palette[scanline[x]];
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					}
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				}
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			}
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		}
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	}
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}