mirror of
https://github.com/knightfox75/nds_nflib.git
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aef2292857
Instead of repeating the same code whenever a file needs to be loaded, move it to a function.
1167 lines
37 KiB
C
1167 lines
37 KiB
C
// SPDX-License-Identifier: MIT
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//
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// Copyright (c) 2009-2014 Cesar Rincon "NightFox"
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// Copyright (c) 2023 Antonio Niño Díaz "AntonioND"
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//
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// NightFox LIB - Tiled background functions
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// http://www.nightfoxandco.com/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <nds.h>
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#include "nf_2d.h"
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#include "nf_basic.h"
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#include "nf_tiledbg.h"
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// Tile and map banks. Each tile bank is 16 KB is size, each map bank is 2 KB in
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// size. Each tile bank can hold 8 map banks.
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u8 NF_BANKS_TILES[2];
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u8 NF_BANKS_MAPS[2];
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// Buffers that store tilesets, maps and palettes
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char *NF_BUFFER_BGTILES[NF_SLOTS_TBG];
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char *NF_BUFFER_BGMAP[NF_SLOTS_TBG];
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char *NF_BUFFER_BGPAL[NF_SLOTS_TBG];
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// Information about backgrounds loaded to RAM
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NF_TYPE_TBG_INFO NF_TILEDBG[NF_SLOTS_TBG];
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// Information about backgrounds shown in the screen
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NF_TYPE_TBGLAYERS_INFO NF_TILEDBG_LAYERS[2][4];
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// Struct that keeps information about extended palettes
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NF_TYPE_EXBGPAL_INFO NF_EXBGPAL[NF_SLOTS_EXBGPAL];
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// Arrays of free tile and map blocks
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u8 NF_TILEBLOCKS[2][NF_MAX_BANKS_TILES];
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u8 NF_MAPBLOCKS[2][NF_MAX_BANKS_MAPS];
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void NF_InitTiledBgBuffers(void)
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{
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// Tiled background buffers
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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NF_BUFFER_BGTILES[n] = NULL;
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NF_BUFFER_BGMAP[n] = NULL;
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NF_BUFFER_BGPAL[n] = NULL;
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snprintf(NF_TILEDBG[n].name, sizeof(NF_TILEDBG[n].name), "xxxNONAMExxx");
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NF_TILEDBG[n].tilesize = 0;
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NF_TILEDBG[n].mapsize = 0;
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NF_TILEDBG[n].palsize = 0;
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NF_TILEDBG[n].width = 0;
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NF_TILEDBG[n].height = 0;
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NF_TILEDBG[n].available = true; // Mark as not used
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}
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// Extended palette buffers
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for (int n = 0; n < NF_SLOTS_EXBGPAL; n++)
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{
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NF_EXBGPAL[n].buffer = NULL;
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NF_EXBGPAL[n].palsize = 0;
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NF_EXBGPAL[n].inuse = false;
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}
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}
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void NF_ResetTiledBgBuffers(void)
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{
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// Free any buffer in use
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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free(NF_BUFFER_BGTILES[n]);
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free(NF_BUFFER_BGMAP[n]);
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free(NF_BUFFER_BGPAL[n]);
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}
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for (int n = 0; n < NF_SLOTS_EXBGPAL; n++)
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NF_EXBGPAL[n].buffer = NULL;
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// Reset variables
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NF_InitTiledBgBuffers();
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}
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void NF_InitTiledBgSys(int screen)
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{
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// Define the number of banks of maps and tiles.
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//
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// Tile banks are 16 KB in size. Map banks are 2 KB in size. You can fit 8
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// map banks in a tile bank. For that reason, the number of map banks must
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// be a multiple of 8 banks.
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//
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// By default, use 8 tile banks and 16 map banks.
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NF_BANKS_TILES[screen] = 8;
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NF_BANKS_MAPS[screen] = 16;
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// Set all tile and map blocks as free
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for (u32 n = 0; n < NF_BANKS_TILES[screen]; n++)
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NF_TILEBLOCKS[screen][n] = 0;
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for (u32 n = 0; n < NF_BANKS_MAPS[screen]; n++)
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NF_MAPBLOCKS[screen][n] = 0;
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// Reset state of all layers
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for (int n = 0; n < 4; n++)
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{
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NF_TILEDBG_LAYERS[screen][n].tilebase = 0;
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NF_TILEDBG_LAYERS[screen][n].tileblocks = 0;
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NF_TILEDBG_LAYERS[screen][n].mapbase = 0;
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NF_TILEDBG_LAYERS[screen][n].mapblocks = 0;
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NF_TILEDBG_LAYERS[screen][n].bgwidth = 0;
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NF_TILEDBG_LAYERS[screen][n].bgheight = 0;
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NF_TILEDBG_LAYERS[screen][n].mapwidth = 0;
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NF_TILEDBG_LAYERS[screen][n].mapheight = 0;
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NF_TILEDBG_LAYERS[screen][n].bgtype = 0;
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NF_TILEDBG_LAYERS[screen][n].bgslot = 0;
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NF_TILEDBG_LAYERS[screen][n].blockx = 0;
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NF_TILEDBG_LAYERS[screen][n].blocky = 0;
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NF_TILEDBG_LAYERS[screen][n].created = false; // Mark as not created
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}
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// Now reserve as many VRAM banks as needed for maps. Each tile map is as
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// big as 8 map banks.
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// Number of required tile maps to reserve for maps
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u8 r_banks = ((NF_BANKS_MAPS[screen] - 1) / 8) + 1;
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for (u32 n = 0; n < r_banks; n++)
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NF_TILEBLOCKS[screen][n] = 128; // Mark as available for maps
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if (screen == 0)
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{
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// Enable extended palettes
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REG_DISPCNT |= DISPLAY_BG_EXT_PALETTE;
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// Clear VRAM_A and VRAM_E
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vramSetBankA(VRAM_A_MAIN_BG);
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memset((void *)0x06000000, 0, 131072);
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vramSetBankE(VRAM_E_LCD);
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memset((void *)0x06880000, 0, 32768);
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// Hide all 4 layers
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for (int n = 0; n < 4; n++)
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NF_HideBg(0, n);
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}
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else
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{
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// Enable extended palettes
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REG_DISPCNT_SUB |= DISPLAY_BG_EXT_PALETTE;
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// Clear VRAM_C and VRAM_H
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vramSetBankC(VRAM_C_SUB_BG);
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memset((void *)0x06200000, 0, 131072);
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vramSetBankH(VRAM_H_LCD);
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memset((void *)0x06898000, 0, 32768);
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// Hide all 4 layers
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for (int n = 0; n < 4; n++)
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NF_HideBg(1, n);
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}
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}
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void NF_LoadTiledBg(const char *file, const char *name, u32 width, u32 height)
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{
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// Look for a free slot
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int slot = 255;
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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if (NF_TILEDBG[n].available)
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{
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NF_TILEDBG[n].available = false; // Mark it as in use
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slot = n;
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break;
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}
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}
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// If there are no free slots, fail
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if (slot == 255)
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NF_Error(103, "Tiled Bg", NF_SLOTS_TBG);
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// The size of the background must be a multiple of 256 pixels (32 tiles)
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if (((width % 256) != 0) || ((height % 256) != 0))
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NF_Error(115, file, 0);
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// Free buffers if they were in use
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free(NF_BUFFER_BGMAP[slot]);
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NF_BUFFER_BGMAP[slot] = NULL;
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free(NF_BUFFER_BGTILES[slot]);
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NF_BUFFER_BGTILES[slot] = NULL;
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free(NF_BUFFER_BGPAL[slot]);
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NF_BUFFER_BGPAL[slot] = NULL;
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// File path
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char filename[256];
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// Load .IMG file
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snprintf(filename, sizeof(filename), "%s/%s.img", NF_ROOTFOLDER, file);
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NF_FileLoad(filename, &NF_BUFFER_BGTILES[slot], &NF_TILEDBG[slot].tilesize, 0);
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// Load .MAP file
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snprintf(filename, sizeof(filename), "%s/%s.map", NF_ROOTFOLDER, file);
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FILE *file_id = fopen(filename, "rb");
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if (file_id == NULL)
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NF_Error(101, filename, 0);
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// Get file size and pad it to a multiple of 2 KB
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fseek(file_id, 0, SEEK_END);
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NF_TILEDBG[slot].mapsize = (((ftell(file_id) - 1) >> 11) + 1) << 11;
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rewind(file_id);
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// Allocate space in RAM and zero it in case there is padding
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NF_BUFFER_BGMAP[slot] = calloc (NF_TILEDBG[slot].mapsize, sizeof(char));
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if (NF_BUFFER_BGMAP[slot] == NULL)
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NF_Error(102, NULL, NF_TILEDBG[slot].mapsize);
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// Load file to RAM
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fread(NF_BUFFER_BGMAP[slot], 1, NF_TILEDBG[slot].mapsize, file_id);
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fclose(file_id);
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// Load .PAL file and pad it to 256 colors
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snprintf(filename, sizeof(filename), "%s/%s.pal", NF_ROOTFOLDER, file);
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NF_FileLoad(filename, &NF_BUFFER_BGPAL[slot], &NF_TILEDBG[slot].palsize, 256 * 2);
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// Save background information
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snprintf(NF_TILEDBG[slot].name, sizeof(NF_TILEDBG[slot].name), "%s", name);
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NF_TILEDBG[slot].width = width;
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NF_TILEDBG[slot].height = height;
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}
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void NF_LoadTilesForBg(const char *file, const char *name, u32 width, u32 height,
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u32 tile_start, u32 tile_end)
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{
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// Look for a free slot
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int slot = 255;
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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if (NF_TILEDBG[n].available)
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{
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NF_TILEDBG[n].available = false; // Mark it as in use
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slot = n;
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break;
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}
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}
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// There are no free slots, fail
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if (slot == 255)
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NF_Error(103, "Tiled Bg", NF_SLOTS_TBG);
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// The size of the background must be a multiple of 256 pixels (32 tiles)
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if (((width % 256) != 0) || ((height % 256) != 0))
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NF_Error(115, file, 0);
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// Free the buffers if they were in use
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free(NF_BUFFER_BGMAP[slot]);
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NF_BUFFER_BGMAP[slot] = NULL;
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free(NF_BUFFER_BGTILES[slot]);
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NF_BUFFER_BGTILES[slot] = NULL;
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free(NF_BUFFER_BGPAL[slot]);
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NF_BUFFER_BGPAL[slot] = NULL;
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// File path
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char filename[256];
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// Load .IMG file
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snprintf(filename, sizeof(filename), "%s/%s.img", NF_ROOTFOLDER, file);
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FILE *file_id = fopen(filename, "rb");
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if (file_id == NULL)
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NF_Error(101, filename, 0);
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// Get file size
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fseek(file_id, 0, SEEK_END);
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u32 tile_size = ftell(file_id);
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rewind(file_id);
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// Calculate the actual size to load. Each size is 64 bytes.
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NF_TILEDBG[slot].tilesize = ((tile_end - tile_start) + 1) * 64;
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// If the size to load is bigger than the file, fail
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if (((tile_end + 1) * 64) > tile_size)
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NF_Error(106, "tile number", tile_size / 64);
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// Allocate space in RAM
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NF_BUFFER_BGTILES[slot] = malloc(NF_TILEDBG[slot].tilesize);
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if (NF_BUFFER_BGTILES[slot] == NULL)
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NF_Error(102, NULL, NF_TILEDBG[slot].tilesize);
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// Start loading from the first tile requested by the caller
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fseek(file_id, tile_start * 64, SEEK_SET);
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// Read file to RAM
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fread(NF_BUFFER_BGTILES[slot], 1, NF_TILEDBG[slot].tilesize, file_id);
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fclose(file_id);
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// Create an empty .MAP file in RAM
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NF_TILEDBG[slot].mapsize = ((width / 8) * (height / 8)) * 2;
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// Allocate space in RAM and zero it as the initial state of the map
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NF_BUFFER_BGMAP[slot] = calloc(NF_TILEDBG[slot].mapsize, sizeof(u8));
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if (NF_BUFFER_BGMAP[slot] == NULL)
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NF_Error(102, NULL, NF_TILEDBG[slot].mapsize);
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// Load .PAL file
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snprintf(filename, sizeof(filename), "%s/%s.pal", NF_ROOTFOLDER, file);
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NF_FileLoad(filename, &NF_BUFFER_BGPAL[slot], &NF_TILEDBG[slot].palsize, 256 * 2);
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// Save background information
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snprintf(NF_TILEDBG[slot].name, sizeof(NF_TILEDBG[slot].name), "%s", name);
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NF_TILEDBG[slot].width = width;
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NF_TILEDBG[slot].height = height;
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}
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void NF_UnloadTiledBg(const char *name)
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{
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// Look for the requested slot
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u32 slot = 255;
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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if (strcmp(name, NF_TILEDBG[n].name) == 0)
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{
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slot = n;
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break;
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}
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}
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// Fail if it wasn't found
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if (slot == 255)
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NF_Error(104, name, 0);
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// Free buffers
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free(NF_BUFFER_BGMAP[slot]);
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NF_BUFFER_BGMAP[slot] = NULL;
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free(NF_BUFFER_BGTILES[slot]);
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NF_BUFFER_BGTILES[slot] = NULL;
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free(NF_BUFFER_BGPAL[slot]);
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NF_BUFFER_BGPAL[slot] = NULL;
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// Reset state of the background
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snprintf(NF_TILEDBG[slot].name, sizeof(NF_TILEDBG[slot].name), "xxxNONAMExxx");
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NF_TILEDBG[slot].tilesize = 0;
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NF_TILEDBG[slot].mapsize = 0;
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NF_TILEDBG[slot].palsize = 0;
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NF_TILEDBG[slot].width = 0;
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NF_TILEDBG[slot].height = 0;
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NF_TILEDBG[slot].available = true; // Mark as available
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}
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void NF_CreateTiledBg(int screen, u32 layer, const char *name)
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{
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// Look for the requested background slot
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u32 slot = 255;
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for (int n = 0; n < NF_SLOTS_TBG; n++)
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{
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if (strcmp(name, NF_TILEDBG[n].name) == 0)
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{
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slot = n;
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break;
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}
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}
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// If the name wasn't found, fail
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if (slot == 255)
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NF_Error(104, name, 0);
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// Delete any background that is already in this layer
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if (NF_TILEDBG_LAYERS[screen][layer].created)
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NF_DeleteTiledBg(screen, layer);
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// Set background information
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NF_TILEDBG_LAYERS[screen][layer].bgwidth = NF_TILEDBG[slot].width;
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NF_TILEDBG_LAYERS[screen][layer].bgheight = NF_TILEDBG[slot].height;
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NF_TILEDBG_LAYERS[screen][layer].mapwidth = NF_TILEDBG[slot].width;
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NF_TILEDBG_LAYERS[screen][layer].mapheight = NF_TILEDBG[slot].height;
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NF_TILEDBG_LAYERS[screen][layer].bgtype = 0; // Set regular type for now
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NF_TILEDBG_LAYERS[screen][layer].bgslot = slot;
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// If the map is infinite determine the type and size of the hardware map
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if ((NF_TILEDBG[slot].width >= 512) && (NF_TILEDBG[slot].height <= 256))
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{
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// >512 x n
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NF_TILEDBG_LAYERS[screen][layer].mapwidth = 512;
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NF_TILEDBG_LAYERS[screen][layer].mapheight = NF_TILEDBG[slot].height;
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NF_TILEDBG_LAYERS[screen][layer].bgtype = 1;
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}
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else if ((NF_TILEDBG[slot].width <= 256) && (NF_TILEDBG[slot].height >= 512))
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{
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// n x >512
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NF_TILEDBG_LAYERS[screen][layer].mapwidth = NF_TILEDBG[slot].width;
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NF_TILEDBG_LAYERS[screen][layer].mapheight = 512;
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NF_TILEDBG_LAYERS[screen][layer].bgtype = 2;
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}
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else if ((NF_TILEDBG[slot].width >= 512) && (NF_TILEDBG[slot].height >= 512))
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{
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// >512 x >512
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NF_TILEDBG_LAYERS[screen][layer].mapwidth = 512;
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NF_TILEDBG_LAYERS[screen][layer].mapheight = 512;
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NF_TILEDBG_LAYERS[screen][layer].bgtype = 3;
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}
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// Look for enough free contiguous tiles blocks in VRAM
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u32 tilesblocks = ((NF_TILEDBG[slot].tilesize - 1) >> 14) + 1;
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u32 counter = 0;
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u32 start = 255;
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for (u32 n = 0; n < NF_BANKS_TILES[screen]; n++)
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{
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// Is this block free?
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if (NF_TILEBLOCKS[screen][n] == 0)
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{
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// If this is the first free block, mark it as the start
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if (counter == 0)
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start = n;
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counter++;
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// If enough blocks have been found, exit
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if (counter == tilesblocks)
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break;
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}
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else
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{
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// The block isn't free, clear the starting point and counter
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start = 255;
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counter = 0;
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}
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}
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// Fail if not enough contiguous free blocks have been found
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if ((start == 255) || (counter < tilesblocks))
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NF_Error(107, name, tilesblocks);
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// Mark all required tile banks as used
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u32 basetiles = start;
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for (u32 n = basetiles; n < (basetiles + tilesblocks); n++)
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NF_TILEBLOCKS[screen][n] = 255;
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// Look for enough free contiguous map blocks in VRAM
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u32 mapblocks;
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if (NF_TILEDBG_LAYERS[screen][layer].bgtype == 0)
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{
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// If this is a normal map (<= 512)
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mapblocks = ((NF_TILEDBG[slot].mapsize - 1) >> 11) + 1;
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}
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else
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{
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// If this is an infinite map (> 512)
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u32 mapsize = ((NF_TILEDBG_LAYERS[screen][layer].mapwidth / 8) *
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(NF_TILEDBG_LAYERS[screen][layer].mapheight / 8)) * 2;
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mapblocks = ((mapsize - 1) >> 11) + 1;
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}
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counter = 0;
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start = 255;
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for (u32 n = 0; n < NF_BANKS_MAPS[screen]; n++)
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{
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// Is this block free?
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if (NF_MAPBLOCKS[screen][n] == 0)
|
|
{
|
|
// If this is the first free block, mark it as the start
|
|
if (counter == 0)
|
|
start = n;
|
|
|
|
counter++;
|
|
|
|
// If enough blocks have been found, exit
|
|
if (counter == mapblocks)
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
// The block isn't free, clear the starting point and counter
|
|
start = 255;
|
|
counter = 0;
|
|
}
|
|
}
|
|
|
|
// Fail if not enough contiguous free blocks have been found
|
|
if ((start == 255) || (counter < mapblocks))
|
|
NF_Error(108, name, mapblocks);
|
|
|
|
// Mark the required map banks as used
|
|
u32 basemap = start;
|
|
for (u32 n = basemap; n < (basemap + mapblocks); n++)
|
|
NF_MAPBLOCKS[screen][n] = 255;
|
|
|
|
// Get background size
|
|
u32 bg_size = 0;
|
|
|
|
if ((NF_TILEDBG_LAYERS[screen][layer].mapwidth == 256) &&
|
|
(NF_TILEDBG_LAYERS[screen][layer].mapheight == 256))
|
|
{
|
|
bg_size = BG_32x32;
|
|
}
|
|
else if ((NF_TILEDBG_LAYERS[screen][layer].mapwidth == 512) &&
|
|
(NF_TILEDBG_LAYERS[screen][layer].mapheight == 256))
|
|
{
|
|
bg_size = BG_64x32;
|
|
}
|
|
else if ((NF_TILEDBG_LAYERS[screen][layer].mapwidth == 256) &&
|
|
(NF_TILEDBG_LAYERS[screen][layer].mapheight == 512))
|
|
{
|
|
bg_size = BG_32x64;
|
|
}
|
|
else if ((NF_TILEDBG_LAYERS[screen][layer].mapwidth == 512) &&
|
|
(NF_TILEDBG_LAYERS[screen][layer].mapheight == 512))
|
|
{
|
|
bg_size = BG_64x64;
|
|
}
|
|
else
|
|
{
|
|
// TODO: Fail
|
|
}
|
|
|
|
// Setup the hardware layer
|
|
if (screen == 0)
|
|
{
|
|
switch (layer)
|
|
{
|
|
case 0:
|
|
REG_BG0CNT = BgType_Text8bpp | bg_size | BG_PRIORITY_0 |
|
|
BG_PALETTE_SLOT0 | BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 1:
|
|
REG_BG1CNT = BgType_Text8bpp | bg_size | BG_PRIORITY_1 |
|
|
BG_PALETTE_SLOT1 | BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 2:
|
|
REG_BG2CNT = BgType_Text8bpp | bg_size | BG_PRIORITY_2 |
|
|
BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 3:
|
|
REG_BG3CNT = BgType_Text8bpp | bg_size | BG_PRIORITY_3 |
|
|
BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (layer)
|
|
{
|
|
case 0:
|
|
REG_BG0CNT_SUB = BgType_Text8bpp | bg_size | BG_PRIORITY_0 |
|
|
BG_PALETTE_SLOT0 | BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 1:
|
|
REG_BG1CNT_SUB = BgType_Text8bpp | bg_size | BG_PRIORITY_1 |
|
|
BG_PALETTE_SLOT1 | BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 2:
|
|
REG_BG2CNT_SUB = BgType_Text8bpp | bg_size | BG_PRIORITY_2 |
|
|
BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
case 3:
|
|
REG_BG3CNT_SUB = BgType_Text8bpp | bg_size | BG_PRIORITY_3 |
|
|
BG_COLOR_256 |
|
|
BG_TILE_BASE(basetiles) | BG_MAP_BASE(basemap);
|
|
break;
|
|
}
|
|
}
|
|
|
|
u32 address;
|
|
|
|
// Copy tileset to VRAM
|
|
if (screen == 0) // VRAM_A
|
|
address = 0x6000000 + (basetiles << 14);
|
|
else // VRAM_C
|
|
address = 0x6200000 + (basetiles << 14);
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGTILES[slot], NF_TILEDBG[slot].tilesize);
|
|
|
|
// Copy map to VRAM
|
|
if (screen == 0) // VRAM_A
|
|
address = 0x6000000 + (basemap << 11);
|
|
else // VRAM_C
|
|
address = 0x6200000 + (basemap << 11);
|
|
|
|
if (NF_TILEDBG_LAYERS[screen][layer].bgtype == 0)
|
|
{
|
|
// Regular 32x32 map, copy it in one go
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGMAP[slot], NF_TILEDBG[slot].mapsize);
|
|
}
|
|
else
|
|
{
|
|
// Infinite map, check the type
|
|
switch (NF_TILEDBG_LAYERS[screen][layer].bgtype)
|
|
{
|
|
case 1: // >512 x 256
|
|
// Blocks A and B (32x32) + (32x32) (2 KB x 2 = 4 KB)
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGMAP[slot], 4096);
|
|
break;
|
|
|
|
case 2: // 256 x >512
|
|
// Block A (32x64) (2 KB x 2 = 4 KB)
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGMAP[slot], 4096);
|
|
break;
|
|
|
|
case 3: // >512 x >512
|
|
// Blocks A and B (32x32) + (32x32) (2 KB x 2 = 4 KB)
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGMAP[slot], 4096);
|
|
// Blocks (+4096) C and D (32x32) + (32x32) (2 KB x 2 = 4 KB)
|
|
u32 offset =
|
|
(((NF_TILEDBG_LAYERS[screen][layer].bgwidth - 1) >> 8) + 1) << 11;
|
|
NF_DmaMemCopy((void *)(address + 4096),
|
|
NF_BUFFER_BGMAP[slot] + offset, 4096);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Copy palette to VRAM
|
|
if (screen == 0)
|
|
{
|
|
vramSetBankE(VRAM_E_LCD);
|
|
address = 0x06880000 + (layer << 13);
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGPAL[slot], NF_TILEDBG[slot].palsize);
|
|
vramSetBankE(VRAM_E_BG_EXT_PALETTE);
|
|
}
|
|
else
|
|
{
|
|
vramSetBankH(VRAM_H_LCD);
|
|
address = 0x06898000 + (layer << 13);
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGPAL[slot], NF_TILEDBG[slot].palsize);
|
|
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
|
|
}
|
|
|
|
// Store background information
|
|
NF_TILEDBG_LAYERS[screen][layer].tilebase = basetiles;
|
|
NF_TILEDBG_LAYERS[screen][layer].tileblocks = tilesblocks;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapbase = basemap;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapblocks = mapblocks;
|
|
NF_TILEDBG_LAYERS[screen][layer].created = true; // Mark as created
|
|
|
|
// Reset scroll
|
|
NF_ScrollBg(screen, layer, 0, 0);
|
|
|
|
// Show the background that contains the newly created layer
|
|
NF_ShowBg(screen, layer);
|
|
}
|
|
|
|
void NF_DeleteTiledBg(int screen, u32 layer)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
NF_HideBg(screen, layer);
|
|
|
|
u32 address;
|
|
|
|
// Clear the tileset from VRAM
|
|
u32 basetiles = NF_TILEDBG_LAYERS[screen][layer].tilebase;
|
|
u32 tilesize = NF_TILEDBG_LAYERS[screen][layer].tileblocks << 14;
|
|
if (screen == 0) // VRAM_A
|
|
address = 0x6000000 + (basetiles << 14);
|
|
else // VRAM_C
|
|
address = 0x6200000 + (basetiles << 14);
|
|
memset((void *)address, 0, tilesize);
|
|
|
|
// Clear the map from VRAM
|
|
u32 basemap = NF_TILEDBG_LAYERS[screen][layer].mapbase;
|
|
u32 mapsize = NF_TILEDBG_LAYERS[screen][layer].mapblocks << 11;
|
|
if (screen == 0) // VRAM_A
|
|
address = 0x6000000 + (basemap << 11);
|
|
else // VRAM_C
|
|
address = 0x6200000 + (basemap << 11);
|
|
memset((void *)address, 0, mapsize);
|
|
|
|
// Delete the palette from VRAM
|
|
if (screen == 0)
|
|
{
|
|
vramSetBankE(VRAM_E_LCD); // Let the CPU access VRAM_E
|
|
address = 0x06880000 + (layer << 13);
|
|
memset((void *)address, 0, 8192);
|
|
vramSetBankE(VRAM_E_BG_EXT_PALETTE);
|
|
}
|
|
else
|
|
{
|
|
vramSetBankH(VRAM_H_LCD); // Let the CPU access VRAM_H
|
|
address = 0x06898000 + (layer << 13);
|
|
memset((void *)address, 0, 8192);
|
|
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
|
|
}
|
|
|
|
// Mark as free the tile and map banks used by this background
|
|
tilesize = (basetiles + NF_TILEDBG_LAYERS[screen][layer].tileblocks);
|
|
for (u32 n = basetiles; n < tilesize; n++)
|
|
NF_TILEBLOCKS[screen][n] = 0;
|
|
|
|
mapsize = (basemap + NF_TILEDBG_LAYERS[screen][layer].mapblocks);
|
|
for (u32 n = basemap; n < mapsize; n++)
|
|
NF_MAPBLOCKS[screen][n] = 0;
|
|
|
|
// Reset layer information
|
|
NF_TILEDBG_LAYERS[screen][layer].tilebase = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].tileblocks = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapbase = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapblocks = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].bgwidth = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].bgheight = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapwidth = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].mapheight = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].bgtype = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].bgslot = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].blockx = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].blocky = 0;
|
|
NF_TILEDBG_LAYERS[screen][layer].created = false; // Mark as not in use
|
|
}
|
|
|
|
u32 NF_GetTileMapAddress(int screen, u32 layer, u32 tile_x, u32 tile_y)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
// Get the map size in tiles
|
|
u32 size_x = NF_TILEDBG_LAYERS[screen][layer].bgwidth / 8;
|
|
u32 size_y = NF_TILEDBG_LAYERS[screen][layer].bgheight / 8;
|
|
|
|
// Check bounds
|
|
if (tile_x > size_x)
|
|
NF_Error(106, "Tile X", size_x);
|
|
if (tile_y > size_y)
|
|
NF_Error(106, "Tile Y", size_y);
|
|
|
|
// Maps bigger than 32x32 are arranged in 32x32 blocks. This calculates the
|
|
// 32x32 block where the tile is.
|
|
u32 block_x = tile_x / 32;
|
|
u32 block_y = tile_y / 32;
|
|
|
|
// Offset to the start of the block
|
|
u32 row_size = (size_x & ~31) * 32;
|
|
u32 scr_y = block_y * row_size;
|
|
u32 scr_x = (block_x * 32) * 32;
|
|
|
|
// Position inside the block
|
|
u32 tls_y = (tile_y - (block_y * 32)) * 32;
|
|
u32 tls_x = tile_x - (block_x * 32);
|
|
|
|
return (scr_y + scr_x + tls_y + tls_x) * 2;
|
|
}
|
|
|
|
u32 NF_GetTileOfMap(int screen, u32 layer, u32 tile_x, u32 tile_y)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
u32 lobyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + address);
|
|
u32 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1));
|
|
|
|
return (hibyte << 8) | lobyte;
|
|
}
|
|
|
|
void NF_SetTileOfMap(int screen, u32 layer, u32 tile_x, u32 tile_y, u32 tile)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
u32 hibyte = (tile >> 8) & 0xff;
|
|
u32 lobyte = tile & 0xff;
|
|
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + address) = lobyte;
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1)) = hibyte;
|
|
}
|
|
|
|
void NF_UpdateVramMap(int screen, u32 layer)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
// Calculate base address of the map
|
|
u32 address;
|
|
|
|
if (screen == 0) // VRAM_A
|
|
address = 0x6000000 + (NF_TILEDBG_LAYERS[screen][layer].mapbase << 11);
|
|
else // VRAM_C
|
|
address = 0x6200000 + (NF_TILEDBG_LAYERS[screen][layer].mapbase << 11);
|
|
|
|
u32 off_x, off_y;
|
|
u32 rowsize;
|
|
|
|
switch (NF_TILEDBG_LAYERS[screen][layer].bgtype)
|
|
{
|
|
case 0: // 256x256 - Block A (32x32) (2 KB)
|
|
// Copy block A
|
|
NF_DmaMemCopy((void *)address,
|
|
NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot],
|
|
2048);
|
|
break;
|
|
|
|
case 1: // 512x256 - Blocks A and B (32x32) + (32x32) (2 KB x 2 = 4 KB)
|
|
// Calculate offset
|
|
off_x = NF_TILEDBG_LAYERS[screen][layer].blockx << 11;
|
|
|
|
// Copy blocks A and B
|
|
NF_DmaMemCopy((void *)address,
|
|
NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + off_x,
|
|
4096);
|
|
break;
|
|
|
|
|
|
case 2: // 256x512 - Block A (32x64) (2 KB x 2 = 4 KB)
|
|
// Calculate offset
|
|
off_y = NF_TILEDBG_LAYERS[screen][layer].blocky << 11;
|
|
|
|
// Copy blocks A and B
|
|
NF_DmaMemCopy((void *)address,
|
|
NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + off_y,
|
|
4096);
|
|
break;
|
|
|
|
case 3: // >512x>512
|
|
// Calculate row size
|
|
rowsize = ((((NF_TILEDBG_LAYERS[screen][layer].bgwidth - 1) >> 8)) + 1) << 11;
|
|
|
|
// Calculate offsets
|
|
off_x = (NF_TILEDBG_LAYERS[screen][layer].blocky * rowsize) +
|
|
(NF_TILEDBG_LAYERS[screen][layer].blockx << 11);
|
|
off_y = off_x + rowsize;
|
|
|
|
// Copy blocks A and B (32x32) + (32x32) (2 KB x 2 = 4KB)
|
|
NF_DmaMemCopy((void *)address,
|
|
NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + off_x,
|
|
4096);
|
|
|
|
// Copy blocks C (+4096) and D (32x32) + (32x32) (2 KB x 2 = 4KB)
|
|
NF_DmaMemCopy((void *)(address + 4096),
|
|
NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + off_y,
|
|
4096);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void NF_BgSetPalColor(int screen, u32 layer, u32 number, u32 r, u32 g, u32 b)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
// Pack RGB value
|
|
u32 rgb = r | (g << 5) | (b << 10);
|
|
|
|
// Modify palette in VRAM
|
|
if (screen == 0)
|
|
{
|
|
vramSetBankE(VRAM_E_LCD); // Let the CPU access VRAM_E
|
|
u32 address = 0x06880000 + (layer << 13) + (number * 2);
|
|
*((u16*)address) = rgb;
|
|
vramSetBankE(VRAM_E_BG_EXT_PALETTE);
|
|
}
|
|
else
|
|
{
|
|
vramSetBankH(VRAM_H_LCD); // Let the CPU access VRAM_H
|
|
u32 address = 0x06898000 + (layer << 13) + (number * 2);
|
|
*((u16*)address) = rgb;
|
|
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
|
|
}
|
|
}
|
|
|
|
void NF_BgEditPalColor(int screen, u32 layer, u32 number, u32 r, u32 g, u32 b)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
// Pack RGB value
|
|
u32 rgb = r | (g << 5) | (b << 10);
|
|
|
|
// Write it to the palette in RAM
|
|
u32 hibyte = (rgb >> 8) & 0xFF;
|
|
u32 lobyte = rgb & 0xFF;
|
|
|
|
*(NF_BUFFER_BGPAL[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (number * 2)) = lobyte;
|
|
*(NF_BUFFER_BGPAL[NF_TILEDBG_LAYERS[screen][layer].bgslot] + ((number * 2) + 1)) = hibyte;
|
|
}
|
|
|
|
void NF_BgUpdatePalette(int screen, u32 layer)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
// Get the RAM palette slot
|
|
u32 slot = NF_TILEDBG_LAYERS[screen][layer].bgslot;
|
|
|
|
// Transfer palette to VRAM
|
|
if (screen == 0)
|
|
{
|
|
vramSetBankE(VRAM_E_LCD); // Let the CPU access VRAM_E
|
|
u32 address = 0x06880000 + (layer << 13);
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGPAL[slot], NF_TILEDBG[slot].palsize);
|
|
vramSetBankE(VRAM_E_BG_EXT_PALETTE);
|
|
}
|
|
else
|
|
{
|
|
vramSetBankH(VRAM_H_LCD); // Let the CPU access VRAM_H
|
|
u32 address = 0x06898000 + (layer << 13);
|
|
NF_DmaMemCopy((void *)address, NF_BUFFER_BGPAL[slot], NF_TILEDBG[slot].palsize);
|
|
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
|
|
}
|
|
}
|
|
|
|
void NF_BgGetPalColor(int screen, u32 layer, u32 number, u8 *r, u8 *g, u8 *b)
|
|
{
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
u32 lobyte = *(NF_BUFFER_BGPAL[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (number * 2));
|
|
u32 hibyte = *(NF_BUFFER_BGPAL[NF_TILEDBG_LAYERS[screen][layer].bgslot] + ((number * 2) + 1));
|
|
|
|
// Get the combined RGB value
|
|
u32 rgb = (hibyte << 8) | lobyte;
|
|
|
|
// Calculate RGB components
|
|
*r = rgb & 0x1F;
|
|
*g = (rgb >> 5) & 0x1F;
|
|
*b = (rgb >> 10) & 0x1F;
|
|
}
|
|
|
|
u32 NF_GetTilePal(int screen, u32 layer, u32 tile_x, u32 tile_y)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
// Get the top byte of the map entry, which contains the palette
|
|
u8 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1));
|
|
|
|
return (hibyte >> 4) & 0x0F;
|
|
}
|
|
|
|
void NF_SetTilePal(int screen, u32 layer, u32 tile_x, u32 tile_y, u32 pal)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
// Extract the top 8 bits of the map entry
|
|
u8 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1));
|
|
|
|
// Preserve all bits but the palette and set the new palette
|
|
u8 data = (hibyte & 0x0F) | (pal << 4);
|
|
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1)) = data;
|
|
}
|
|
|
|
void NF_LoadExBgPal(const char *file, u32 slot)
|
|
{
|
|
if (slot > (NF_SLOTS_EXBGPAL - 1))
|
|
NF_Error(106, "ExBgPal", NF_SLOTS_EXBGPAL - 1);
|
|
|
|
// Free the buffer if it was in use
|
|
free(NF_EXBGPAL[slot].buffer);
|
|
NF_EXBGPAL[slot].buffer = NULL;
|
|
|
|
// Load .PAL file
|
|
char filename[256];
|
|
snprintf(filename, sizeof(filename), "%s/%s.pal", NF_ROOTFOLDER, file);
|
|
NF_FileLoad(filename, &NF_EXBGPAL[slot].buffer, &NF_EXBGPAL[slot].palsize, 256 * 2);
|
|
|
|
// Mark this slot as unused
|
|
NF_EXBGPAL[slot].inuse = true;
|
|
}
|
|
|
|
void NF_UnloadExBgPal(u32 slot)
|
|
{
|
|
if (slot > (NF_SLOTS_EXBGPAL - 1))
|
|
NF_Error(106, "ExBgPal", (NF_SLOTS_EXBGPAL - 1));
|
|
|
|
if (!NF_EXBGPAL[slot].inuse)
|
|
NF_Error(110, "ExBgPal", slot);
|
|
|
|
// Free the buffer
|
|
free(NF_EXBGPAL[slot].buffer);
|
|
NF_EXBGPAL[slot].buffer = NULL;
|
|
|
|
NF_EXBGPAL[slot].palsize = 0;
|
|
|
|
// Mark the slot as unused
|
|
NF_EXBGPAL[slot].inuse = false;
|
|
}
|
|
|
|
void NF_VramExBgPal(int screen, u32 layer, u32 id, u32 slot)
|
|
{
|
|
if (slot > (NF_SLOTS_EXBGPAL - 1))
|
|
NF_Error(106, "ExBgPal", (NF_SLOTS_EXBGPAL - 1));
|
|
|
|
if (!NF_EXBGPAL[slot].inuse)
|
|
NF_Error(110, "ExBgPal", slot);
|
|
|
|
// Transfer palette to VRAM
|
|
if (screen == 0)
|
|
{
|
|
vramSetBankE(VRAM_E_LCD); // Allow CPU accesses
|
|
u32 address = 0x06880000 + (layer << 13) + (slot * 256 * 2);
|
|
NF_DmaMemCopy((void *)address, NF_EXBGPAL[id].buffer, NF_EXBGPAL[id].palsize);
|
|
vramSetBankE(VRAM_E_BG_EXT_PALETTE);
|
|
}
|
|
else
|
|
{
|
|
vramSetBankH(VRAM_H_LCD); // Allow CPU accesses
|
|
u32 address = 0x06898000 + (layer << 13) + (slot * 256 * 2);
|
|
NF_DmaMemCopy((void *)address, NF_EXBGPAL[id].buffer, NF_EXBGPAL[id].palsize);
|
|
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
|
|
}
|
|
}
|
|
|
|
void NF_SetExBgPal(int screen, u32 layer, u32 pal)
|
|
{
|
|
if (pal > 15)
|
|
NF_Error(106, "ExBgPal", (NF_SLOTS_EXBGPAL - 1));
|
|
|
|
if (!NF_TILEDBG_LAYERS[screen][layer].created)
|
|
{
|
|
char text[32];
|
|
snprintf(text, sizeof(text), "%d", screen);
|
|
NF_Error(105, text, layer);
|
|
}
|
|
|
|
u32 mapsize = NF_TILEDBG[NF_TILEDBG_LAYERS[screen][layer].bgslot].mapsize;
|
|
|
|
for (u32 pos = 0; pos < mapsize; pos += 2)
|
|
{
|
|
// Extract the top 8 bits of the map entry
|
|
u32 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (pos + 1));
|
|
|
|
// Preserve all bits but the palette and set the new palette
|
|
u32 data = (hibyte & 0x0F) | (pal << 4);
|
|
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (pos + 1)) = data;
|
|
}
|
|
|
|
// Update the copy of the map in VRAM
|
|
NF_UpdateVramMap(screen, layer);
|
|
}
|
|
|
|
void NF_SetTileHflip(int screen, u32 layer, u32 tile_x, u32 tile_y)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
// Extract the top 8 bits of the map entry
|
|
u32 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1));
|
|
|
|
// Flip the bit that controls the horizontal flip of the tile
|
|
hibyte ^= 0x04;
|
|
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1)) = hibyte;
|
|
}
|
|
|
|
void NF_SetTileVflip(int screen, u32 layer, u32 tile_x, u32 tile_y)
|
|
{
|
|
u32 address = NF_GetTileMapAddress(screen, layer, tile_x, tile_y);
|
|
|
|
// Extract the top 8 bits of the map entry
|
|
u32 hibyte = *(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1));
|
|
|
|
// Flip the bit that controls the vertical flip of the tile
|
|
hibyte ^= 0x08;
|
|
|
|
*(NF_BUFFER_BGMAP[NF_TILEDBG_LAYERS[screen][layer].bgslot] + (address + 1)) = hibyte;
|
|
}
|
|
|
|
void NF_RotateTileGfx(u32 slot, u32 tile, u32 rotation)
|
|
{
|
|
// Allocate temporary buffers
|
|
char *character_a = malloc(64);
|
|
if (character_a == NULL)
|
|
NF_Error(102, NULL, 64);
|
|
|
|
char *character_b = malloc(64);
|
|
if (character_b == NULL)
|
|
NF_Error(102, NULL, 64);
|
|
|
|
// Copy tile to a temporary working buffer
|
|
memcpy(character_a, NF_BUFFER_BGTILES[slot] + (tile * 64), 64);
|
|
|
|
int xb, yb;
|
|
|
|
switch (rotation)
|
|
{
|
|
case 1: // 90 degrees clockwise
|
|
xb = 7;
|
|
yb = 0;
|
|
for (int ya = 0; ya < 8; ya++)
|
|
{
|
|
for (int xa = 0; xa < 8; xa++)
|
|
{
|
|
int pos_a = (ya * 8) + xa;
|
|
int pos_b = (yb * 8) + xb;
|
|
character_b[pos_b] = character_a[pos_a];
|
|
yb++;
|
|
if (yb > 7)
|
|
{
|
|
yb = 0;
|
|
xb--;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 2: // 90 degrees counter-clockwise
|
|
xb = 0;
|
|
yb = 7;
|
|
for (int ya = 0; ya < 8; ya++)
|
|
{
|
|
for (int xa = 0; xa < 8; xa++)
|
|
{
|
|
int pos_a = (ya * 8) + xa;
|
|
int pos_b = (yb * 8) + xb;
|
|
character_b[pos_b] = character_a[pos_a];
|
|
yb--;
|
|
if (yb < 0)
|
|
{
|
|
yb = 7;
|
|
xb++;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 3: // 180 degrees
|
|
xb = 7;
|
|
yb = 7;
|
|
for (int ya = 0; ya < 8; ya++)
|
|
{
|
|
for (int xa = 0; xa < 8; xa++)
|
|
{
|
|
int pos_a = (ya * 8) + xa;
|
|
int pos_b = (yb * 8) + xb;
|
|
character_b[pos_b] = character_a[pos_a];
|
|
xb--;
|
|
if (xb < 0)
|
|
{
|
|
xb = 0;
|
|
yb--;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Copy the rotated tile to its final destination
|
|
memcpy(NF_BUFFER_BGTILES[slot] + (tile * 64), character_b, 64);
|
|
|
|
// Free temporary buffers
|
|
free(character_a);
|
|
free(character_b);
|
|
}
|