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package com.pkrandom.ctr;
/*----------------------------------------------------------------------------*/
/*-- BFLIM.java - class for reading/parsing BFLIM images. --*/
/*-- Note that this class is optimized around handling Gen 7 --*/
/*-- Pokemon icons, and won't work for all types of BFLIMs --*/
/*-- --*/
/*-- Code based on "Switch Toolbox", copyright (C) KillzXGaming --*/
/*-- --*/
/*-- Ported to Java by UPR-ZX Team under the terms of the GPL: --*/
/*-- --*/
/*-- This program is free software: you can redistribute it and/or modify --*/
/*-- it under the terms of the GNU General Public License as published by --*/
/*-- the Free Software Foundation, either version 3 of the License, or --*/
/*-- (at your option) any later version. --*/
/*-- --*/
/*-- This program is distributed in the hope that it will be useful, --*/
/*-- but WITHOUT ANY WARRANTY; without even the implied warranty of --*/
/*-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --*/
/*-- GNU General Public License for more details. --*/
/*-- --*/
/*-- You should have received a copy of the GNU General Public License --*/
/*-- along with this program. If not, see <http://www.gnu.org/licenses/>. --*/
/*----------------------------------------------------------------------------*/
import com.pkrandom.FileFunctions;
import java.awt.image.BufferedImage;
public class BFLIM {
private int width;
private int height;
private byte[] imageData;
private Header header;
private Image image;
public BFLIM(byte[] bflimBytes) {
if (bflimBytes.length < 0x28) {
throw new IllegalArgumentException("Invalid BFLIM: not long enough to contain a header");
}
header = new Header(bflimBytes);
image = new Image(bflimBytes);
width = image.width;
height = image.height;
imageData = new byte[image.imageSize];
System.arraycopy(bflimBytes, 0, imageData, 0, image.imageSize);
}
@SuppressWarnings("SuspiciousNameCombination")
public BufferedImage getImage() {
// Swap width and height, because the image is rendered on its side
int swappedWidth = height;
int swappedHeight = width;
int[] decodedImageData = decodeBlock(imageData, swappedWidth, swappedHeight);
int[] colorData = convertToColorData(decodedImageData);
int[] correctedColorData = rearrangeImage(colorData, width, height);
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int color = correctedColorData[x + (y * this.width)];
image.setRGB(x, y, color);
}
}
return image;
}
private static int[] SwizzleLUT = {
0, 1, 8, 9, 2, 3, 10, 11,
16, 17, 24, 25, 18, 19, 26, 27,
4, 5, 12, 13, 6, 7, 14, 15,
20, 21, 28, 29, 22, 23, 30, 31,
32, 33, 40, 41, 34, 35, 42, 43,
48, 49, 56, 57, 50, 51, 58, 59,
36, 37, 44, 45, 38, 39, 46, 47,
52, 53, 60, 61, 54, 55, 62, 63
};
private int[] decodeBlock(byte[] data, int width, int height) {
int[] output = new int[width * height * 4];
int inputOffset = 0;
for (int ty = 0; ty < height; ty += 8) {
for (int tx = 0; tx < width; tx += 8) {
for (int px = 0; px < 64; px++) {
int x = SwizzleLUT[px] & 7;
int y = (SwizzleLUT[px] - x) >> 3;
int outputOffset = (tx + x + ((height - 1 - (ty + y)) * width)) * 4;
int value = FileFunctions.read2ByteInt(data, inputOffset);
if (image.format == 7) {
decodeRGBA5551(output, outputOffset, value);
} else if (image.format == 8) {
decodeRGBA4(output, outputOffset, value);
} else {
throw new IllegalArgumentException("Unsupported BFLIM: unsupported image format");
}
inputOffset += 2;
}
}
}
return output;
}
private int[] convertToColorData(int[] decodedImageData) {
int[] output = new int[decodedImageData.length / 4];
for (int i = 0; i < decodedImageData.length; i += 4) {
int a = decodedImageData[i];
int b = decodedImageData[i + 1];
int g = decodedImageData[i + 2];
int r = decodedImageData[i + 3];
int color = (a << 24) | (b << 16) | (g << 8) | r;
output[i / 4] = color;
}
return output;
}
private int[] rearrangeImage(int[] colorData, int width, int height) {
int[] output = new int[colorData.length];
for (int destY = 0; destY < height; destY++) {
for (int destX = 0; destX < width; destX++) {
int srcX = height - destY - 1;
int srcY = width - destX - 1;
int srcIndex = srcX + (srcY * height);
int destIndex = destX + (destY * width);
output[destIndex] = colorData[srcIndex];
}
}
return output;
}
private static void decodeRGBA5551(int[] output, int outputOffset, int value) {
int R = ((value >> 1) & 0x1f) << 3;
int G = ((value >> 6) & 0x1f) << 3;
int B = ((value >> 11) & 0x1f) << 3;
int A = (value & 1) * 0xFF;
R = R | (R >> 5);
G = G | (G >> 5);
B = B | (B >> 5);
output[outputOffset] = A;
output[outputOffset + 1] = B;
output[outputOffset + 2] = G;
output[outputOffset + 3] = R;
}
private static void decodeRGBA4(int[] output, int outputOffset, int value) {
int R = ((value >> 4) & 0xf);
int G = ((value >> 8) & 0xf);
int B = ((value >> 12) & 0xf);
int A = (value & 1) | (value << 4);
R = R | (R << 4);
G = G | (G << 4);
B = B | (B << 4);
output[outputOffset] = A;
output[outputOffset + 1] = B;
output[outputOffset + 2] = G;
output[outputOffset + 3] = R;
}
private class Header {
public int version;
public Header(byte[] bflimBytes) {
int headerOffset = bflimBytes.length - 0x28;
int signature = FileFunctions.readFullIntBigEndian(bflimBytes, headerOffset);
if (signature != 0x464C494D) {
throw new IllegalArgumentException("Invalid BFLIM: cannot find FLIM header");
}
boolean bigEndian = FileFunctions.read2ByteInt(bflimBytes, headerOffset + 4) == 0xFFFE;
if (bigEndian) {
throw new IllegalArgumentException("Unsupported BFLIM: this is a big endian BFLIM");
}
int headerSize = FileFunctions.read2ByteInt(bflimBytes, headerOffset + 6);
if (headerSize != 0x14) {
throw new IllegalArgumentException("Invalid BFLIM: header length does not equal 0x14");
}
version = FileFunctions.readFullInt(bflimBytes, headerOffset + 8);
}
}
private class Image {
public int size;
public short width;
public short height;
public short alignment;
public byte format;
public byte flags;
public int imageSize;
public Image(byte[] bflimBytes) {
int imageHeaderOffset = bflimBytes.length - 0x14;
int signature = FileFunctions.readFullIntBigEndian(bflimBytes, imageHeaderOffset);
if (signature != 0x696D6167) {
throw new IllegalArgumentException("Invalid BFLIM: cannot find imag header");
}
size = FileFunctions.readFullInt(bflimBytes, imageHeaderOffset + 4);
width = (short) FileFunctions.read2ByteInt(bflimBytes, imageHeaderOffset + 8);
height = (short) FileFunctions.read2ByteInt(bflimBytes, imageHeaderOffset + 10);
alignment = (short) FileFunctions.read2ByteInt(bflimBytes, imageHeaderOffset + 12);
format = bflimBytes[imageHeaderOffset + 14];
flags = bflimBytes[imageHeaderOffset + 15];
imageSize = FileFunctions.readFullInt(bflimBytes, imageHeaderOffset + 16);
}
}
}
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