I am looking for a small and free TGA image loading class or library for java. Ideally the result is a BufferedImage.
Yes, I have already googled, but most results are outdated, or are quite big libraries that contain a lot of other stuff i dont need. I am looking for something small and simple that reads just TGA images.
Thanks!
We use this class copied from some open source project to read TGA files. It's really old. It can only handle Targa files with most basic encoding. Give it a try.
public class TargaReader
{
public static Image getImage(String fileName) throws IOException
{
File f = new File(fileName);
byte[] buf = new byte[(int)f.length()];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(f));
bis.read(buf);
bis.close();
return decode(buf);
}
private static int offset;
private static int btoi(byte b)
{
int a = b;
return (a<0?256+a:a);
}
private static int read(byte[] buf)
{
return btoi(buf[offset++]);
}
public static Image decode(byte[] buf) throws IOException
{
offset = 0;
// Reading header
for (int i=0;i<12;i++)
read(buf);
int width = read(buf)+(read(buf)<<8);
int height = read(buf)+(read(buf)<<8);
read(buf);
read(buf);
// Reading data
int n = width*height;
int[] pixels = new int[n];
int idx=0;
while (n>0)
{
int nb = read(buf);
if ((nb&0x80)==0)
{
for (int i=0;i<=nb;i++)
{
int b = read(buf);
int g = read(buf);
int r = read(buf);
pixels[idx++] = 0xff000000 | (r<<16) | (g<<8) | b;
}
}
else
{
nb &= 0x7f;
int b = read(buf);
int g = read(buf);
int r = read(buf);
int v = 0xff000000 | (r<<16) | (g<<8) | b;
for (int i=0;i<=nb;i++)
pixels[idx++] = v;
}
n-=nb+1;
}
BufferedImage bimg = new BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
bimg.setRGB(0,0,width,height,pixels,0,width);
return bimg;
}
}
I had uncompressed targa images, so had to tweak example code. Here is my edit it should support uncompressed targa 24bit BGR and 32bit BGRA
// http://paulbourke.net/dataformats/tga/
// little endian multi-byte integers: "low-order byte,high-order byte"
// 00,04 -> 04,00 -> 1024
class TargaReader {
public static BufferedImage getImage(String fileName) throws IOException {
File f = new File(fileName);
byte[] buf = new byte[(int)f.length()];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(f));
bis.read(buf);
bis.close();
return decode(buf);
}
private static int offset;
private static int btoi(byte b) {
int a = b;
return (a<0?256+a:a);
}
private static int read(byte[] buf) {
return btoi(buf[offset++]);
}
public static BufferedImage decode(byte[] buf) throws IOException {
offset = 0;
// Reading header bytes
// buf[2]=image type code 0x02=uncompressed BGR or BGRA
// buf[12]+[13]=width
// buf[14]+[15]=height
// buf[16]=image pixel size 0x20=32bit, 0x18=24bit
// buf{17]=Image Descriptor Byte=0x28 (00101000)=32bit/origin upperleft/non-interleaved
for (int i=0;i<12;i++)
read(buf);
int width = read(buf)+(read(buf)<<8); // 00,04=1024
int height = read(buf)+(read(buf)<<8); // 40,02=576
read(buf);
read(buf);
int n = width*height;
int[] pixels = new int[n];
int idx=0;
if (buf[2]==0x02 && buf[16]==0x20) { // uncompressed BGRA
while(n>0) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
int a = read(buf);
int v = (a<<24) | (r<<16) | (g<<8) | b;
pixels[idx++] = v;
n-=1;
}
} else if (buf[2]==0x02 && buf[16]==0x18) { // uncompressed BGR
while(n>0) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
int a = 255; // opaque pixel
int v = (a<<24) | (r<<16) | (g<<8) | b;
pixels[idx++] = v;
n-=1;
}
} else {
// RLE compressed
while (n>0) {
int nb = read(buf); // num of pixels
if ((nb&0x80)==0) { // 0x80=dec 128, bits 10000000
for (int i=0;i<=nb;i++) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
pixels[idx++] = 0xff000000 | (r<<16) | (g<<8) | b;
}
} else {
nb &= 0x7f;
int b = read(buf);
int g = read(buf);
int r = read(buf);
int v = 0xff000000 | (r<<16) | (g<<8) | b;
for (int i=0;i<=nb;i++)
pixels[idx++] = v;
}
n-=nb+1;
}
}
BufferedImage bimg = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
bimg.setRGB(0, 0, width,height, pixels, 0,width);
return bimg;
}
}
I've added a standalone copy of Reality Interactive's ImageIO TGA library here (LGPL):
https://github.com/tmyroadctfig/com.realityinteractive.imageio.tga
Just add the the jar file to your classpath and register with ImageIO:
IIORegistry registry = IIORegistry.getDefaultInstance();
registry.registerServiceProvider(
new com.realityinteractive.imageio.tga.TGAImageReaderSpi());
Just in case anyone is looking for the Android version of this (I had to replace BufferedImage with Bitmap).
class TargaReader {
public static Bitmap getImage(String fileName) throws IOException {
File f = new File(fileName);
byte[] buf = new byte[(int) f.length()];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(f));
bis.read(buf);
bis.close();
return decode(buf);
}
private static int offset;
private static int btoi(byte b) {
int a = b;
return (a < 0 ? 256 + a : a);
}
private static int read(byte[] buf) {
return btoi(buf[offset++]);
}
public static Bitmap decode(byte[] buf) throws IOException {
offset = 0;
// Reading header bytes
// buf[2]=image type code 0x02=uncompressed BGR or BGRA
// buf[12]+[13]=width
// buf[14]+[15]=height
// buf[16]=image pixel size 0x20=32bit, 0x18=24bit
// buf{17]=Image Descriptor Byte=0x28 (00101000)=32bit/origin
// upperleft/non-interleaved
for (int i = 0; i < 12; i++)
read(buf);
int width = read(buf) + (read(buf) << 8); // 00,04=1024
int height = read(buf) + (read(buf) << 8); // 40,02=576
read(buf);
read(buf);
int n = width * height;
int[] pixels = new int[n];
int idx = 0;
if (buf[2] == 0x02 && buf[16] == 0x20) { // uncompressed BGRA
while (n > 0) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
int a = read(buf);
int v = (a << 24) | (r << 16) | (g << 8) | b;
pixels[idx++] = v;
n -= 1;
}
} else if (buf[2] == 0x02 && buf[16] == 0x18) { // uncompressed BGR
while (n > 0) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
int a = 255; // opaque pixel
int v = (a << 24) | (r << 16) | (g << 8) | b;
pixels[idx++] = v;
n -= 1;
}
} else {
// RLE compressed
while (n > 0) {
int nb = read(buf); // num of pixels
if ((nb & 0x80) == 0) { // 0x80=dec 128, bits 10000000
for (int i = 0; i <= nb; i++) {
int b = read(buf);
int g = read(buf);
int r = read(buf);
pixels[idx++] = 0xff000000 | (r << 16) | (g << 8) | b;
}
} else {
nb &= 0x7f;
int b = read(buf);
int g = read(buf);
int r = read(buf);
int v = 0xff000000 | (r << 16) | (g << 8) | b;
for (int i = 0; i <= nb; i++)
pixels[idx++] = v;
}
n -= nb + 1;
}
}
Bitmap bimg = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bimg.setPixels(pixels, 0, width, 0, 0, width, height);
return bimg;
}
}
Thanks for sharing it!
I've made some changes to improve performance. I'm only doing BGRA 32 Bits file decrypt, but it can help others people.
public static BufferedImage createTGAImage(byte[] buff) throws IOException {
int offset = 0, width = 0, height = 0;
int[] tgaBuffer = null;
if (buff[2] == 0x02) { // BGRA File
offset = 12;
width = (buff[offset + 1] << 8 | buff[offset]);
offset = 14;
height = (buff[offset + 1] << 8 | buff[offset]);
int colorDepth = buff[offset + 2];
if (colorDepth == 0x20) { // 32 bits depth
offset = 18;
int count = width * height;
tgaBuffer = new int[count];
for (int i = 0; i < count; i++) {
byte b = buff[offset++]; //This is for didatic prupose, you can remove it and make inline covert.
byte g = buff[offset++];
byte r = buff[offset++];
byte a = buff[offset++];
tgaBuffer[i] = ((a & 0xFF) << 24 | (r & 0xFF) << 16 | (g & 0xFF)<< 8 | b & 0xFF);
}
}
}
BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
result.setRGB(0, 0, width, height, tgaBuffer, 0, width);
return result;
}
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