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Diffstat (limited to 'src/com/pkrandom/ctr/BFLIM.java')
-rw-r--r--src/com/pkrandom/ctr/BFLIM.java203
1 files changed, 203 insertions, 0 deletions
diff --git a/src/com/pkrandom/ctr/BFLIM.java b/src/com/pkrandom/ctr/BFLIM.java
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+++ b/src/com/pkrandom/ctr/BFLIM.java
@@ -0,0 +1,203 @@
+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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