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-rw-r--r--src/net/java/games/util/DDSReader.java413
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diff --git a/src/net/java/games/util/DDSReader.java b/src/net/java/games/util/DDSReader.java
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-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * - Redistribution of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistribution in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- *
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package net.java.games.util;
-
-import java.io.*;
-import java.nio.*;
-import java.nio.channels.*;
-
-/** A reader for DirectDraw Surface (.dds) files, which are used to
- describe textures. These files can contain multiple mipmap levels
- in one file. This reader is currently minimal and does not support
- all of the possible file formats. */
-
-public class DDSReader {
-
- /** Simple class describing images and data; does not encapsulate
- image format information. User is responsible for transmitting
- that information in another way. */
-
- public static class ImageInfo {
- private ByteBuffer data;
- private int width;
- private int height;
-
- public ImageInfo(ByteBuffer data, int width, int height) {
- this.data = data; this.width = width; this.height = height;
- }
- public int getWidth() { return width; }
- public int getHeight() { return height; }
- public ByteBuffer getData() { return data; }
- }
-
- private FileInputStream fis;
- private FileChannel chan;
- private ByteBuffer buf;
- private Header header;
-
- // FourCC codes (compression formats)
- public static final int DXT1 = 0x31545844;
- public static final int DXT2 = 0x32545844;
- public static final int DXT3 = 0x33545844;
- public static final int DXT4 = 0x34545844;
- public static final int DXT5 = 0x35545844;
-
- //
- // Selected bits in header flags
- //
-
- public static final int DDSD_CAPS = 0x00000001; // Capacities are valid
- public static final int DDSD_HEIGHT = 0x00000002; // Height is valid
- public static final int DDSD_WIDTH = 0x00000004; // Width is valid
- public static final int DDSD_PITCH = 0x00000008; // Pitch is valid
- public static final int DDSD_BACKBUFFERCOUNT = 0x00000020; // Back buffer count is valid
- public static final int DDSD_ZBUFFERBITDEPTH = 0x00000040; // Z-buffer bit depth is valid (shouldn't be used in DDSURFACEDESC2)
- public static final int DDSD_ALPHABITDEPTH = 0x00000080; // Alpha bit depth is valid
- public static final int DDSD_LPSURFACE = 0x00000800; // lpSurface is valid
- public static final int DDSD_PIXELFORMAT = 0x00001000; // ddpfPixelFormat is valid
- public static final int DDSD_MIPMAPCOUNT = 0x00020000; // Mip map count is valid
- public static final int DDSD_LINEARSIZE = 0x00080000; // dwLinearSize is valid
- public static final int DDSD_DEPTH = 0x00800000; // dwDepth is valid
-
- public static final int DDPF_ALPHAPIXELS = 0x00000001; // Alpha channel is present
- public static final int DDPF_ALPHA = 0x00000002; // Only contains alpha information
- public static final int DDPF_RGB = 0x00000040; // RGB data is present
-
- // Selected bits in DDS capabilities flags
- public static final int DDSCAPS_TEXTURE = 0x00001000; // Can be used as a texture
- public static final int DDSCAPS_MIPMAP = 0x00400000; // Is one level of a mip-map
-
- // Known pixel formats
- public static final int D3DFMT_UNKNOWN = 0;
- public static final int D3DFMT_R8G8B8 = 20;
- public static final int D3DFMT_A8R8G8B8 = 21;
- public static final int D3DFMT_X8R8G8B8 = 22;
-
- public void loadFile(String filename) throws IOException {
- File file = new File(filename);
- fis = new FileInputStream(filename);
- chan = fis.getChannel();
- buf = chan.map(FileChannel.MapMode.READ_ONLY,
- 0, (int) file.length());
- buf.order(ByteOrder.LITTLE_ENDIAN);
- header = new Header();
- header.read(buf);
- }
-
- public void close() {
- try {
- chan.close();
- fis.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
-
- /** Test for presence/absence of surface description flags (DDSD_*) */
- public boolean isSurfaceDescFlagSet(int flag) {
- return ((header.flags & flag) != 0);
- }
-
- /** Test for presence/absence of pixel format flags (DDPF_*) */
- public boolean isPixelFormatFlagSet(int flag) {
- return ((header.pfFlags & flag) != 0);
- }
-
- /** Gets the pixel format of this texture (D3DFMT_*) based on some
- heuristics. Returns D3DFMT_UNKNOWN if could not recognize the
- pixel format. */
- public int getPixelFormat() {
- if (isPixelFormatFlagSet(DDPF_RGB)) {
- if (isPixelFormatFlagSet(DDPF_ALPHAPIXELS)) {
- if (getDepth() == 32 &&
- header.pfRBitMask == 0x00FF0000 &&
- header.pfGBitMask == 0x0000FF00 &&
- header.pfBBitMask == 0x000000FF &&
- header.pfABitMask == 0xFF000000) {
- return D3DFMT_A8R8G8B8;
- }
- } else {
- if (getDepth() == 24 &&
- header.pfRBitMask == 0x00FF0000 &&
- header.pfGBitMask == 0x0000FF00 &&
- header.pfBBitMask == 0x000000FF) {
- return D3DFMT_R8G8B8;
- } else if (getDepth() == 32 &&
- header.pfRBitMask == 0x00FF0000 &&
- header.pfGBitMask == 0x0000FF00 &&
- header.pfBBitMask == 0x000000FF) {
- return D3DFMT_X8R8G8B8;
- }
- }
- }
-
- return D3DFMT_UNKNOWN;
- }
-
- /** Indicates whether this texture is compressed. */
- public boolean isCompressed() {
- return (getCompressionFormat() != 0);
- }
-
- /** If this surface is compressed, returns the kind of compression
- used (DXT1..DXT5). */
- public int getCompressionFormat() {
- return header.pfFourCC;
- }
-
- /** Width of the texture (or the top-most mipmap if mipmaps are
- present) */
- public int getWidth() {
- return header.width;
- }
-
- /** Height of the texture (or the top-most mipmap if mipmaps are
- present) */
- public int getHeight() {
- return header.height;
- }
-
- /** Total number of bits per pixel. Only valid if DDPF_RGB is
- present. For A8R8G8B8, would be 32. */
- public int getDepth() {
- return header.pfRGBBitCount;
- }
-
- /** Number of mip maps in the texture */
- public int getNumMipMaps() {
- if (!isSurfaceDescFlagSet(DDSD_MIPMAPCOUNT)) {
- return 0;
- }
- return header.mipMapCountOrAux;
- }
-
- /** Gets the <i>i</i>th mipmap data (0..getNumMipMaps() - 1) */
- public ImageInfo getMipMap(int map) {
- if (isCompressed()) {
- throw new RuntimeException("Sorry, compressed textures not supported yet");
- }
- // Figure out how far to seek
- int seek = 4 + header.size;
- for (int i = 0; i < map; i++) {
- seek += mipMapSizeInBytes(i);
- }
- buf.limit(seek + mipMapSizeInBytes(map));
- buf.position(seek);
- ByteBuffer next = buf.slice();
- buf.position(0);
- buf.limit(buf.capacity());
- return new ImageInfo(next, mipMapWidth(map), mipMapHeight(map));
- }
-
- /** Returns an array of ImageInfos corresponding to all mipmap
- levels of this DDS file. */
- public ImageInfo[] getAllMipMaps() {
- int numLevels = getNumMipMaps();
- if (numLevels == 0) {
- numLevels = 1;
- }
- ImageInfo[] result = new ImageInfo[numLevels];
- for (int i = 0; i < numLevels; i++) {
- result[i] = getMipMap(i);
- }
- return result;
- }
-
- public void debugPrint() {
- PrintStream tty = System.err;
- tty.println("Compressed texture: " + isCompressed());
- if (isCompressed()) {
- int fmt = getCompressionFormat();
- StringBuffer buf = new StringBuffer();
- for (int i = 0; i < 4; i++) {
- char c = (char) (fmt & 0xFF);
- buf.append(c);
- fmt = fmt >> 8;
- }
- tty.println("Compression format: 0x" + Integer.toHexString(getCompressionFormat()) + " (" + buf + ")");
- }
- tty.println("SurfaceDesc flags:");
- boolean recognizedAny = false;
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_CAPS, "DDSD_CAPS");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_HEIGHT, "DDSD_HEIGHT");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_WIDTH, "DDSD_WIDTH");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_PITCH, "DDSD_PITCH");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_BACKBUFFERCOUNT, "DDSD_BACKBUFFERCOUNT");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_ZBUFFERBITDEPTH, "DDSD_ZBUFFERBITDEPTH");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_ALPHABITDEPTH, "DDSD_ALPHABITDEPTH");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_LPSURFACE, "DDSD_LPSURFACE");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_PIXELFORMAT, "DDSD_PIXELFORMAT");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_MIPMAPCOUNT, "DDSD_MIPMAPCOUNT");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_LINEARSIZE, "DDSD_LINEARSIZE");
- recognizedAny |= printIfRecognized(tty, header.flags, DDSD_DEPTH, "DDSD_DEPTH");
- if (!recognizedAny) {
- tty.println("(none)");
- }
- tty.println("Raw SurfaceDesc flags: 0x" + Integer.toHexString(header.flags));
- tty.println("Pixel format flags:");
- recognizedAny = false;
- recognizedAny |= printIfRecognized(tty, header.pfFlags, DDPF_RGB, "DDPF_RGB");
- recognizedAny |= printIfRecognized(tty, header.pfFlags, DDPF_ALPHA, "DDPF_ALPHA");
- recognizedAny |= printIfRecognized(tty, header.pfFlags, DDPF_ALPHAPIXELS, "DDPF_ALPHAPIXELS");
- if (!recognizedAny) {
- tty.println("(none)");
- }
- tty.println("Raw pixel format flags: 0x" + Integer.toHexString(header.pfFlags));
- tty.println("Depth: " + getDepth());
- tty.println("Number of mip maps: " + getNumMipMaps());
- int fmt = getPixelFormat();
- tty.print("Pixel format: ");
- switch (fmt) {
- case D3DFMT_R8G8B8: tty.println("D3DFMT_R8G8B8"); break;
- case D3DFMT_A8R8G8B8: tty.println("D3DFMT_A8R8G8B8"); break;
- case D3DFMT_X8R8G8B8: tty.println("D3DFMT_X8R8G8B8"); break;
- case D3DFMT_UNKNOWN: tty.println("D3DFMT_UNKNOWN"); break;
- default: tty.println("(unknown pixel format " + fmt + ")"); break;
- }
- }
-
- //----------------------------------------------------------------------
- // Internals only below this point
- //
-
- private static final int MAGIC = 0x20534444;
-
- static class Header {
- int size; // size of the DDSURFACEDESC structure
- int flags; // determines what fields are valid
- int height; // height of surface to be created
- int width; // width of input surface
- int pitchOrLinearSize;
- int backBufferCountOrDepth;
- int mipMapCountOrAux; // number of mip-map levels requested (in this context)
- int alphaBitDepth; // depth of alpha buffer requested
- int reserved1; // reserved
- int surface; // pointer to the associated surface memory
- // NOTE: following two entries are from DDCOLORKEY data structure
- // Are overlaid with color for empty cubemap faces (unused in this reader)
- int colorSpaceLowValue;
- int colorSpaceHighValue;
- int destBltColorSpaceLowValue;
- int destBltColorSpaceHighValue;
- int srcOverlayColorSpaceLowValue;
- int srcOverlayColorSpaceHighValue;
- int srcBltColorSpaceLowValue;
- int srcBltColorSpaceHighValue;
- // NOTE: following entries are from DDPIXELFORMAT data structure
- // Are overlaid with flexible vertex format description of vertex
- // buffers (unused in this reader)
- int pfSize; // size of DDPIXELFORMAT structure
- int pfFlags; // pixel format flags
- int pfFourCC; // (FOURCC code)
- // Following five entries have multiple interpretations, not just
- // RGBA (but that's all we support right now)
- int pfRGBBitCount; // how many bits per pixel
- int pfRBitMask; // mask for red bits
- int pfGBitMask; // mask for green bits
- int pfBBitMask; // mask for blue bits
- int pfABitMask; // mask for alpha channel
- int ddsCaps1; // Texture and mip-map flags
- int ddsCaps2; // Advanced capabilities, not yet used
- int ddsCapsReserved1;
- int ddsCapsReserved2;
- int textureStage; // stage in multitexture cascade
-
- void read(ByteBuffer buf) throws IOException {
- int magic = buf.getInt();
- if (magic != MAGIC) {
- throw new IOException("Incorrect magic number 0x" +
- Integer.toHexString(magic) +
- " (expected " + MAGIC + ")");
- }
-
- size = buf.getInt();
- flags = buf.getInt();
- height = buf.getInt();
- width = buf.getInt();
- pitchOrLinearSize = buf.getInt();
- backBufferCountOrDepth = buf.getInt();
- mipMapCountOrAux = buf.getInt();
- alphaBitDepth = buf.getInt();
- reserved1 = buf.getInt();
- surface = buf.getInt();
- colorSpaceLowValue = buf.getInt();
- colorSpaceHighValue = buf.getInt();
- destBltColorSpaceLowValue = buf.getInt();
- destBltColorSpaceHighValue = buf.getInt();
- srcOverlayColorSpaceLowValue = buf.getInt();
- srcOverlayColorSpaceHighValue = buf.getInt();
- srcBltColorSpaceLowValue = buf.getInt();
- srcBltColorSpaceHighValue = buf.getInt();
- pfSize = buf.getInt();
- pfFlags = buf.getInt();
- pfFourCC = buf.getInt();
- pfRGBBitCount = buf.getInt();
- pfRBitMask = buf.getInt();
- pfGBitMask = buf.getInt();
- pfBBitMask = buf.getInt();
- pfABitMask = buf.getInt();
- ddsCaps1 = buf.getInt();
- ddsCaps2 = buf.getInt();
- ddsCapsReserved1 = buf.getInt();
- ddsCapsReserved2 = buf.getInt();
- textureStage = buf.getInt();
- }
- }
-
- private int mipMapWidth(int map) {
- int width = getWidth();
- for (int i = 0; i < map; i++) {
- width >>= 1;
- }
- return width;
- }
-
- private int mipMapHeight(int map) {
- int height = getHeight();
- for (int i = 0; i < map; i++) {
- height >>= 1;
- }
- return height;
- }
-
- private int mipMapSizeInBytes(int map) {
- int width = mipMapWidth(map);
- int height = mipMapHeight(map);
- return width * height * (getDepth() / 8);
- }
-
- private boolean printIfRecognized(PrintStream tty, int flags, int flag, String what) {
- if ((flags & flag) != 0) {
- tty.println(what);
- return true;
- }
- return false;
- }
-}
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