mirror of
https://github.com/buserror/mii_emu.git
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2e12a37bce
Split the UI into separate bits. + Bits that are X11/GLX only + Bits that are 'pure' opengl + Bits that are UI related but not renderer related Hopefully with help porting to other platformsI Signed-off-by: Michel Pollet <buserror@gmail.com>
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* mii_floppy.h
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*
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* Copyright (C) 2024 Michel Pollet <buserror@gmail.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include <stdint.h>
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#include "mii_dd.h"
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// for NIB and others. can be bigger on .WOZ
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#define MII_FLOPPY_DEFAULT_TRACK_SIZE 6656
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#define MII_FLOPPY_TRACK_COUNT 35
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/*
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* Reasons for write protect. Ie checkbox in the UI, or file format
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* doesn't support writes, or the file has no write permissions.
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*/
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enum {
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MII_FLOPPY_WP_MANUAL = (1 << 0), // write protect by the user
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MII_FLOPPY_WP_RO_FILE = (1 << 1), // file is read only
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MII_FLOPPY_WP_RO_FORMAT = (1 << 2), // File format doesn't do writes
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};
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typedef struct mii_floppy_track_t {
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uint8_t dirty : 1; // track has been written to
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uint32_t bit_count;
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} mii_floppy_track_t;
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// 32 bytes of track data corresponds to one byte of heatmap
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#define MII_FLOPPY_HM_HIT_SIZE 32
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// thats 208 bytes per track or about 7KB*2 for the whole disk for read+write
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// we align it on 16 bytes to make it easier to use in a shader
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#define MII_FLOPPY_HM_TRACK_SIZE \
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(((MII_FLOPPY_DEFAULT_TRACK_SIZE / MII_FLOPPY_HM_HIT_SIZE) + 15) & ~15)
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typedef struct mii_track_heatmap_t {
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// 32 bytes of track data corresponds to one byte of heatmap
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uint32_t seed, tex, cleared;
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// this needs to be aligned, otherwise SSE code will die horribly
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uint8_t map[MII_FLOPPY_TRACK_COUNT][MII_FLOPPY_HM_TRACK_SIZE]
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__attribute__((aligned(16)));
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} mii_track_heatmap_t;
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typedef struct mii_floppy_heatmap_t {
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mii_track_heatmap_t read, write;
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} mii_floppy_heatmap_t;
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//
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#define MII_FLOPPY_NOISE_TRACK MII_FLOPPY_TRACK_COUNT
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typedef struct mii_floppy_t {
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uint8_t write_protected : 3, id : 2;
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uint8_t bit_timing; // 0=32 (default)
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uint8_t motor; // motor is on
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uint8_t stepper; // last step we did...
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uint8_t qtrack; // quarter track we are on
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uint32_t bit_position;
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// this is incremented each time a track is marked dirty
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uint32_t seed_dirty;
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uint32_t seed_saved; // last seed we saved at
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uint8_t track_id[MII_FLOPPY_TRACK_COUNT * 4];
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mii_floppy_track_t tracks[MII_FLOPPY_TRACK_COUNT + 1];
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// keep all the data together, we'll use it to make a texture
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// the last track is used for noise
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uint8_t track_data[MII_FLOPPY_TRACK_COUNT + 1][MII_FLOPPY_DEFAULT_TRACK_SIZE];
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/* This is set by the UI to trakc the head movements, no functional use */
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mii_floppy_heatmap_t * heat; // optional heatmap
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} mii_floppy_t;
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/*
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* Initialize a floppy structure with random data. It is not formatted, just
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* ready to use for loading a disk image, or formatting as a 'virgin' disk.
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*/
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void
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mii_floppy_init(
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mii_floppy_t *f);
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int
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mii_floppy_load(
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mii_floppy_t *f,
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mii_dd_file_t *file );
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int
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mii_floppy_update_tracks(
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mii_floppy_t *f,
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mii_dd_file_t *file );
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