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This commit is contained in:
PikalaxALT
@@ -0,0 +1,535 @@
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// Copyright (c) 2015 YamaArashi
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include "global.h"
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#include "gfx.h"
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#include "util.h"
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#define GET_GBA_PAL_RED(x) (((x) >> 0) & 0x1F)
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#define GET_GBA_PAL_GREEN(x) (((x) >> 5) & 0x1F)
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#define GET_GBA_PAL_BLUE(x) (((x) >> 10) & 0x1F)
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#define SET_GBA_PAL(r, g, b) (((b) << 10) | ((g) << 5) | (r))
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#define UPCONVERT_BIT_DEPTH(x) (((x) * 255) / 31)
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#define DOWNCONVERT_BIT_DEPTH(x) ((x) / 8)
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static inline void swap_bytes(unsigned char * orig, unsigned char * dest) {
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unsigned char tmp = *orig;
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*orig = *dest;
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*dest = tmp;
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}
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static inline unsigned char swap_nybbles(unsigned char orig)
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{
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return (orig >> 4) | (orig << 4);
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}
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static inline void swap_bytes_nybswap(unsigned char * orig, unsigned char * dest) {
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unsigned char tmp = swap_nybbles(*orig);
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*orig = swap_nybbles(*dest);
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*dest = tmp;
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}
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static inline unsigned char reverse_bits(unsigned char orig) {
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unsigned char dest = 0;
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for (int i = 0; i < 8; i++)
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{
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dest <<= 1;
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dest |= orig & 1;
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orig >>= 1;
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}
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return dest;
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}
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static void vflip(unsigned char * tile, int bitDepth) {
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for (int x = 0; x < bitDepth; x++)
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{
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unsigned char * col = tile + x;
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swap_bytes(col + 0 * bitDepth, col + 7 * bitDepth);
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swap_bytes(col + 1 * bitDepth, col + 6 * bitDepth);
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swap_bytes(col + 2 * bitDepth, col + 5 * bitDepth);
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swap_bytes(col + 3 * bitDepth, col + 4 * bitDepth);
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}
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}
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static void hflip(unsigned char * tile, int bitDepth) {
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for (int y = 0; y < 8; y++)
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{
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unsigned char * row = tile + y * bitDepth;
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switch (bitDepth)
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{
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case 1:
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*row = reverse_bits(*row);
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break;
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case 4:
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swap_bytes_nybswap(row + 0, row + 3);
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swap_bytes_nybswap(row + 1, row + 2);
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break;
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case 8:
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swap_bytes(row + 0, row + 56);
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swap_bytes(row + 8, row + 48);
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swap_bytes(row + 16, row + 40);
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swap_bytes(row + 24, row + 32);
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break;
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}
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}
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}
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static unsigned char * ApplyTilemap(struct Image *image, unsigned char * buffer, int bitDepth)
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{
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int tileSize = bitDepth * 8;
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unsigned char * tiles = calloc(image->tileMap.numTiles, tileSize);
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int i;
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struct Tile tileInfo;
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for (i = 0; i < image->tileMap.numTiles; i++) {
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tileInfo = image->tileMap.data[i];
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unsigned char * tile = tiles + i * tileSize;
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memcpy(tile, buffer + tileInfo.index * tileSize, tileSize);
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if (tileInfo.xflip)
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hflip(tile, bitDepth);
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if (tileInfo.yflip)
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vflip(tile, bitDepth);
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}
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free(buffer);
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return tiles;
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}
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static unsigned char * BuildTilemap(struct Image *image, unsigned char * buffer, int * bufferSize)
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{
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int tileSize = image->bitDepth * 8;
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unsigned char * outputPixels = calloc(1024, tileSize);
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int nTilesIn = image->height * image->width / 64;
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image->tileMap.data = calloc(nTilesIn, sizeof(struct Tilemap));
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image->tileMap.numTiles = nTilesIn;
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int nTilesOut = 0;
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unsigned char curTile1[tileSize];
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unsigned char curTile2[tileSize];
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for (int i = 0; i < nTilesIn; i++) {
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bool xflip = false;
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bool yflip = false;
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int j;
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memcpy(curTile1, buffer + i * tileSize, tileSize);
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for (j = 0; j < nTilesOut; j++) {
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memcpy(curTile2, outputPixels + j * tileSize, tileSize);
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if (memcmp(curTile1, curTile2, tileSize) == 0)
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break;
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xflip = true;
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hflip(curTile2, image->bitDepth);
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if (memcmp(curTile1, curTile2, tileSize) == 0)
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break;
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yflip = true;
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vflip(curTile2, image->bitDepth);
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if (memcmp(curTile1, curTile2, tileSize) == 0)
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break;
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xflip = false;
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hflip(curTile2, image->bitDepth);
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if (memcmp(curTile1, curTile2, tileSize) == 0)
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break;
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yflip = false;
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}
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image->tileMap.data[i].index = j;
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image->tileMap.data[i].xflip = xflip;
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image->tileMap.data[i].yflip = yflip;
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image->tileMap.data[i].palno = 0;
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if (j >= nTilesOut) {
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if (nTilesOut >= 1024)
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FATAL_ERROR("Cannot reduce image to 1024 or fewer tiles.\n");
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memcpy(outputPixels + nTilesOut * tileSize, curTile1, tileSize);
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nTilesOut++;
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}
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}
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free(buffer);
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*bufferSize = nTilesOut * tileSize;
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return outputPixels;
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}
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static void AdvanceMetatilePosition(int *subTileX, int *subTileY, int *metatileX, int *metatileY, int metatilesWide, int metatileWidth, int metatileHeight)
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{
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(*subTileX)++;
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if (*subTileX == metatileWidth) {
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*subTileX = 0;
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(*subTileY)++;
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if (*subTileY == metatileHeight) {
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*subTileY = 0;
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(*metatileX)++;
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if (*metatileX == metatilesWide) {
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*metatileX = 0;
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(*metatileY)++;
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}
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}
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}
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}
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static void ConvertFromTiles1Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = metatilesWide * metatileWidth;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int destY = (metatileY * metatileHeight + subTileY) * 8 + j;
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int destX = metatileX * metatileWidth + subTileX;
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unsigned char srcPixelOctet = *src++;
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unsigned char *destPixelOctet = &dest[destY * pitch + destX];
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for (int k = 0; k < 8; k++) {
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*destPixelOctet <<= 1;
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*destPixelOctet |= (srcPixelOctet & 1) ^ invertColors;
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srcPixelOctet >>= 1;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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static void ConvertFromTiles4Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = (metatilesWide * metatileWidth) * 4;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int destY = (metatileY * metatileHeight + subTileY) * 8 + j;
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for (int k = 0; k < 4; k++) {
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int destX = (metatileX * metatileWidth + subTileX) * 4 + k;
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unsigned char srcPixelPair = *src++;
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unsigned char leftPixel = srcPixelPair & 0xF;
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unsigned char rightPixel = srcPixelPair >> 4;
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if (invertColors) {
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leftPixel = 15 - leftPixel;
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rightPixel = 15 - rightPixel;
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}
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dest[destY * pitch + destX] = (leftPixel << 4) | rightPixel;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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static void ConvertFromTiles8Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = (metatilesWide * metatileWidth) * 8;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int destY = (metatileY * metatileHeight + subTileY) * 8 + j;
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for (int k = 0; k < 8; k++) {
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int destX = (metatileX * metatileWidth + subTileX) * 8 + k;
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unsigned char srcPixel = *src++;
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if (invertColors)
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srcPixel = 255 - srcPixel;
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dest[destY * pitch + destX] = srcPixel;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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static void ConvertToTiles1Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = metatilesWide * metatileWidth;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int srcY = (metatileY * metatileHeight + subTileY) * 8 + j;
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int srcX = metatileX * metatileWidth + subTileX;
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unsigned char srcPixelOctet = src[srcY * pitch + srcX];
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unsigned char *destPixelOctet = dest++;
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for (int k = 0; k < 8; k++) {
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*destPixelOctet <<= 1;
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*destPixelOctet |= (srcPixelOctet & 1) ^ invertColors;
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srcPixelOctet >>= 1;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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static void ConvertToTiles4Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = (metatilesWide * metatileWidth) * 4;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int srcY = (metatileY * metatileHeight + subTileY) * 8 + j;
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for (int k = 0; k < 4; k++) {
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int srcX = (metatileX * metatileWidth + subTileX) * 4 + k;
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unsigned char srcPixelPair = src[srcY * pitch + srcX];
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unsigned char leftPixel = srcPixelPair >> 4;
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unsigned char rightPixel = srcPixelPair & 0xF;
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if (invertColors) {
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leftPixel = 15 - leftPixel;
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rightPixel = 15 - rightPixel;
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}
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*dest++ = (rightPixel << 4) | leftPixel;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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static void ConvertToTiles8Bpp(unsigned char *src, unsigned char *dest, int numTiles, int metatilesWide, int metatileWidth, int metatileHeight, bool invertColors)
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{
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int subTileX = 0;
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int subTileY = 0;
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int metatileX = 0;
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int metatileY = 0;
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int pitch = (metatilesWide * metatileWidth) * 8;
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for (int i = 0; i < numTiles; i++) {
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for (int j = 0; j < 8; j++) {
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int srcY = (metatileY * metatileHeight + subTileY) * 8 + j;
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for (int k = 0; k < 8; k++) {
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int srcX = (metatileX * metatileWidth + subTileX) * 8 + k;
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unsigned char srcPixel = src[srcY * pitch + srcX];
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if (invertColors)
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srcPixel = 255 - srcPixel;
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*dest++ = srcPixel;
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}
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}
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AdvanceMetatilePosition(&subTileX, &subTileY, &metatileX, &metatileY, metatilesWide, metatileWidth, metatileHeight);
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}
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}
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void ReadImage(char *path, int tilesWidth, int bitDepth, int metatileWidth, int metatileHeight, struct Image *image, bool invertColors)
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{
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int tileSize = bitDepth * 8;
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int fileSize;
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unsigned char *buffer = ReadWholeFile(path, &fileSize);
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int numTiles;
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if (image->hasTilemap) {
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buffer = ApplyTilemap(image, buffer, bitDepth);
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numTiles = image->tileMap.numTiles;
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}
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else
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numTiles = fileSize / tileSize;
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int tilesHeight = (numTiles + tilesWidth - 1) / tilesWidth;
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if (tilesWidth % metatileWidth != 0)
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FATAL_ERROR("The width in tiles (%d) isn't a multiple of the specified metatile width (%d)\n", tilesWidth, metatileWidth);
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if (tilesHeight % metatileHeight != 0)
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FATAL_ERROR("The height in tiles (%d) isn't a multiple of the specified metatile height (%d)\n", tilesHeight, metatileHeight);
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image->width = tilesWidth * 8;
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image->height = tilesHeight * 8;
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image->bitDepth = bitDepth;
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image->pixels = calloc(tilesWidth * tilesHeight, tileSize);
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if (image->pixels == NULL)
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FATAL_ERROR("Failed to allocate memory for pixels.\n");
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int metatilesWide = tilesWidth / metatileWidth;
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switch (bitDepth) {
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case 1:
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ConvertFromTiles1Bpp(buffer, image->pixels, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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break;
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case 4:
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ConvertFromTiles4Bpp(buffer, image->pixels, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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break;
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case 8:
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ConvertFromTiles8Bpp(buffer, image->pixels, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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break;
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}
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free(buffer);
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}
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void WriteImage(char *path, int numTiles, int bitDepth, int metatileWidth, int metatileHeight, struct Image *image, bool invertColors)
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{
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int tileSize = bitDepth * 8;
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if (image->width % 8 != 0)
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FATAL_ERROR("The width in pixels (%d) isn't a multiple of 8.\n", image->width);
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||||
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if (image->height % 8 != 0)
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FATAL_ERROR("The height in pixels (%d) isn't a multiple of 8.\n", image->height);
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int tilesWidth = image->width / 8;
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int tilesHeight = image->height / 8;
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if (tilesWidth % metatileWidth != 0)
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FATAL_ERROR("The width in tiles (%d) isn't a multiple of the specified metatile width (%d)", tilesWidth, metatileWidth);
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if (tilesHeight % metatileHeight != 0)
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FATAL_ERROR("The height in tiles (%d) isn't a multiple of the specified metatile height (%d)", tilesHeight, metatileHeight);
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int maxNumTiles = tilesWidth * tilesHeight;
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if (numTiles == 0)
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numTiles = maxNumTiles;
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else if (numTiles > maxNumTiles)
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FATAL_ERROR("The specified number of tiles (%d) is greater than the maximum possible value (%d).\n", numTiles, maxNumTiles);
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||||
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int bufferSize = numTiles * tileSize;
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unsigned char *buffer = malloc(bufferSize);
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||||
|
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if (buffer == NULL)
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FATAL_ERROR("Failed to allocate memory for pixels.\n");
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||||
|
||||
int metatilesWide = tilesWidth / metatileWidth;
|
||||
|
||||
switch (bitDepth) {
|
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case 1:
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||||
ConvertToTiles1Bpp(image->pixels, buffer, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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||||
break;
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||||
case 4:
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||||
ConvertToTiles4Bpp(image->pixels, buffer, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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||||
break;
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||||
case 8:
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||||
ConvertToTiles8Bpp(image->pixels, buffer, numTiles, metatilesWide, metatileWidth, metatileHeight, invertColors);
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||||
break;
|
||||
}
|
||||
|
||||
if (image->hasTilemap)
|
||||
buffer = BuildTilemap(image, buffer, &bufferSize);
|
||||
|
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WriteWholeFile(path, buffer, bufferSize);
|
||||
|
||||
free(buffer);
|
||||
}
|
||||
|
||||
void FreeImage(struct Image *image)
|
||||
{
|
||||
free(image->pixels);
|
||||
image->pixels = NULL;
|
||||
if (image->hasTilemap && image->tileMap.data != NULL) {
|
||||
free(image->tileMap.data);
|
||||
image->tileMap.data = NULL;
|
||||
image->tileMap.numTiles = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void ReadGbaPalette(char *path, struct Palette *palette)
|
||||
{
|
||||
int fileSize;
|
||||
unsigned char *data = ReadWholeFile(path, &fileSize);
|
||||
|
||||
if (fileSize % 2 != 0)
|
||||
FATAL_ERROR("The file size (%d) is not a multiple of 2.\n", fileSize);
|
||||
|
||||
palette->numColors = fileSize / 2;
|
||||
|
||||
for (int i = 0; i < palette->numColors; i++) {
|
||||
uint16_t paletteEntry = (data[i * 2 + 1] << 8) | data[i * 2];
|
||||
palette->colors[i].red = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_RED(paletteEntry));
|
||||
palette->colors[i].green = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_GREEN(paletteEntry));
|
||||
palette->colors[i].blue = UPCONVERT_BIT_DEPTH(GET_GBA_PAL_BLUE(paletteEntry));
|
||||
}
|
||||
|
||||
free(data);
|
||||
}
|
||||
|
||||
void WriteGbaPalette(char *path, struct Palette *palette)
|
||||
{
|
||||
FILE *fp = fopen(path, "wb");
|
||||
|
||||
if (fp == NULL)
|
||||
FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
|
||||
|
||||
for (int i = 0; i < palette->numColors; i++) {
|
||||
unsigned char red = DOWNCONVERT_BIT_DEPTH(palette->colors[i].red);
|
||||
unsigned char green = DOWNCONVERT_BIT_DEPTH(palette->colors[i].green);
|
||||
unsigned char blue = DOWNCONVERT_BIT_DEPTH(palette->colors[i].blue);
|
||||
|
||||
uint16_t paletteEntry = SET_GBA_PAL(red, green, blue);
|
||||
|
||||
fputc(paletteEntry & 0xFF, fp);
|
||||
fputc(paletteEntry >> 8, fp);
|
||||
}
|
||||
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
void ReadGbaTilemap(char *path, struct Tilemap *tileMap)
|
||||
{
|
||||
int fileSize;
|
||||
unsigned char *data = ReadWholeFile(path, &fileSize);
|
||||
|
||||
if (fileSize % 2 != 0)
|
||||
FATAL_ERROR("The file size (%d) is not a multiple of 2.\n", fileSize);
|
||||
|
||||
tileMap->numTiles = fileSize / 2;
|
||||
tileMap->data = malloc(tileMap->numTiles * sizeof(struct Tile));
|
||||
|
||||
for (int i = 0; i < tileMap->numTiles; i++)
|
||||
{
|
||||
uint16_t raw = data[2 * i + 0] | (data[2 * i + 1] << 8);
|
||||
tileMap->data[i].index = raw & 0x3FF;
|
||||
tileMap->data[i].xflip = raw & 0x400 ? 1 : 0;
|
||||
tileMap->data[i].yflip = raw & 0x800 ? 1 : 0;
|
||||
tileMap->data[i].palno = raw >> 12;
|
||||
}
|
||||
|
||||
free(data);
|
||||
}
|
||||
|
||||
void WriteGbaTilemap(char *path, struct Tilemap *tileMap)
|
||||
{
|
||||
FILE *fp = fopen(path, "wb");
|
||||
|
||||
if (fp == NULL)
|
||||
FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
|
||||
|
||||
for (int i = 0; i < tileMap->numTiles; i++) {
|
||||
uint16_t raw = tileMap->data[i].index
|
||||
| (tileMap->data[i].xflip << 10)
|
||||
| (tileMap->data[i].yflip << 11)
|
||||
| (tileMap->data[i].palno << 12);
|
||||
fputc(raw & 0xFF, fp);
|
||||
fputc(raw >> 8, fp);
|
||||
}
|
||||
|
||||
fclose(fp);
|
||||
}
|
||||
Reference in New Issue
Block a user