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-rwxr-xr-xsrc/classes/com/sun/opengl/util/texture/spi/DDSImage.java160
1 files changed, 144 insertions, 16 deletions
diff --git a/src/classes/com/sun/opengl/util/texture/spi/DDSImage.java b/src/classes/com/sun/opengl/util/texture/spi/DDSImage.java
index 8680ada1c..52dbc25b1 100755
--- a/src/classes/com/sun/opengl/util/texture/spi/DDSImage.java
+++ b/src/classes/com/sun/opengl/util/texture/spi/DDSImage.java
@@ -121,6 +121,16 @@ public class DDSImage {
// 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
+ public static final int DDSCAPS_COMPLEX = 0x00000008; // Complex surface structure, such as a cube map
+
+ // Selected bits in DDS extended capabilities flags
+ public static final int DDSCAPS2_CUBEMAP = 0x00000200;
+ public static final int DDSCAPS2_CUBEMAP_POSITIVEX = 0x00000400;
+ public static final int DDSCAPS2_CUBEMAP_NEGATIVEX = 0x00000800;
+ public static final int DDSCAPS2_CUBEMAP_POSITIVEY = 0x00001000;
+ public static final int DDSCAPS2_CUBEMAP_NEGATIVEY = 0x00002000;
+ public static final int DDSCAPS2_CUBEMAP_POSITIVEZ = 0x00004000;
+ public static final int DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x00008000;
// Known pixel formats
public static final int D3DFMT_UNKNOWN = 0;
@@ -135,13 +145,23 @@ public class DDSImage {
public static final int D3DFMT_DXT5 = 0x35545844;
/** Reads a DirectDraw surface from the specified file name,
- returning the resulting DDSImage. */
+ returning the resulting DDSImage.
+
+ @param filename File name
+ @return DDS image object
+ @throws java.io.IOException if an I/O exception occurred
+ */
public static DDSImage read(String filename) throws IOException {
return read(new File(filename));
}
/** Reads a DirectDraw surface from the specified file, returning
- the resulting DDSImage. */
+ the resulting DDSImage.
+
+ @param file File object
+ @return DDS image object
+ @throws java.io.IOException if an I/O exception occurred
+ */
public static DDSImage read(File file) throws IOException {
DDSImage image = new DDSImage();
image.readFromFile(file);
@@ -149,7 +169,12 @@ public class DDSImage {
}
/** Reads a DirectDraw surface from the specified ByteBuffer, returning
- the resulting DDSImage. */
+ the resulting DDSImage.
+
+ @param buf Input data
+ @return DDS image object
+ @throws java.io.IOException if an I/O exception occurred
+ */
public static DDSImage read(ByteBuffer buf) throws IOException {
DDSImage image = new DDSImage();
image.readFromBuffer(buf);
@@ -189,6 +214,7 @@ public class DDSImage {
* be specified, or they all must be
* @throws IllegalArgumentException if the data does not match the
* specified arguments
+ * @return DDS image object
*/
public static DDSImage createFromData(int d3dFormat,
int width,
@@ -202,7 +228,12 @@ public class DDSImage {
/** Determines from the magic number whether the given InputStream
points to a DDS image. The given InputStream must return true
from markSupported() and support a minimum of four bytes of
- read-ahead. */
+ read-ahead.
+
+ @param in Stream to check
+ @return true if input stream is DDS image or false otherwise
+ @throws java.io.IOException if an I/O exception occurred
+ */
public static boolean isDDSImage(InputStream in) throws IOException {
if (!(in instanceof BufferedInputStream)) {
in = new BufferedInputStream(in);
@@ -226,6 +257,8 @@ public class DDSImage {
/**
* Writes this DDSImage to the specified file name.
+ * @param filename File name to write to
+ * @throws java.io.IOException if an I/O exception occurred
*/
public void write(String filename) throws IOException {
write(new File(filename));
@@ -233,6 +266,8 @@ public class DDSImage {
/**
* Writes this DDSImage to the specified file name.
+ * @param file File object to write to
+ * @throws java.io.IOException if an I/O exception occurred
*/
public void write(File file) throws IOException {
FileOutputStream stream = new FileOutputStream(file);
@@ -251,7 +286,10 @@ public class DDSImage {
stream.close();
}
- /** Test for presence/absence of surface description flags (DDSD_*) */
+ /** Test for presence/absence of surface description flags (DDSD_*)
+ * @param flag DDSD_* flags set to test
+ * @return true if flag present or false otherwise
+ */
public boolean isSurfaceDescFlagSet(int flag) {
return ((header.flags & flag) != 0);
}
@@ -294,6 +332,23 @@ public class DDSImage {
return D3DFMT_UNKNOWN;
}
+ /**
+ * Indicates whether this texture is cubemap
+ * @return true if cubemap or false otherwise
+ */
+ public boolean isCubemap() {
+ return ((header.ddsCaps1 & DDSCAPS_COMPLEX) != 0) && ((header.ddsCaps2 & DDSCAPS2_CUBEMAP) != 0);
+ }
+
+ /**
+ * Indicates whethe this cubemap side present
+ * @param side Side to test
+ * @return true if side present or false otherwise
+ */
+ public boolean isCubemapSidePresent(int side) {
+ return isCubemap() && (header.ddsCaps2 & side) != 0;
+ }
+
/** Indicates whether this texture is compressed. */
public boolean isCompressed() {
return (isPixelFormatFlagSet(DDPF_FOURCC));
@@ -331,8 +386,27 @@ public class DDSImage {
return header.mipMapCountOrAux;
}
- /** Gets the <i>i</i>th mipmap data (0..getNumMipMaps() - 1) */
+ /** Gets the <i>i</i>th mipmap data (0..getNumMipMaps() - 1)
+ * @param map Mipmap index
+ * @return Image object
+ */
public ImageInfo getMipMap(int map) {
+ return getMipMap( 0, map );
+ }
+
+ /**
+ * Gets the <i>i</i>th mipmap data (0..getNumMipMaps() - 1)
+ * @param side Cubemap side or 0 for 2D texture
+ * @param map Mipmap index
+ * @return Image object
+ */
+ public ImageInfo getMipMap(int side, int map) {
+ if (!isCubemap() && (side != 0)) {
+ throw new RuntimeException( "Illegal side for 2D texture: " + side );
+ }
+ if (isCubemap() && !isCubemapSidePresent(side)) {
+ throw new RuntimeException( "Illegal side, side not present: " + side );
+ }
if (getNumMipMaps() > 0 &&
((map < 0) || (map >= getNumMipMaps()))) {
throw new RuntimeException("Illegal mipmap number " + map + " (0.." + (getNumMipMaps() - 1) + ")");
@@ -340,6 +414,9 @@ public class DDSImage {
// Figure out how far to seek
int seek = Header.writtenSize();
+ if (isCubemap()) {
+ seek += sideShiftInBytes(side);
+ }
for (int i = 0; i < map; i++) {
seek += mipMapSizeInBytes(i);
}
@@ -352,21 +429,36 @@ public class DDSImage {
}
/** Returns an array of ImageInfos corresponding to all mipmap
- levels of this DDS file. */
+ levels of this DDS file.
+ @return Mipmap image objects set
+ */
public ImageInfo[] getAllMipMaps() {
+ return getAllMipMaps(0);
+ }
+
+ /**
+ * Returns an array of ImageInfos corresponding to all mipmap
+ * levels of this DDS file.
+ * @param side Cubemap side or 0 for 2D texture
+ * @return Mipmap image objects set
+ */
+ public ImageInfo[] getAllMipMaps( int side ) {
int numLevels = getNumMipMaps();
if (numLevels == 0) {
numLevels = 1;
}
ImageInfo[] result = new ImageInfo[numLevels];
for (int i = 0; i < numLevels; i++) {
- result[i] = getMipMap(i);
+ result[i] = getMipMap(side, i);
}
return result;
}
/** Converts e.g. DXT1 compression format constant (see {@link
- #getCompressionFormat}) into "DXT1". */
+ #getCompressionFormat}) into "DXT1".
+ @param compressionFormat Compression format constant
+ @return String format code
+ */
public static String getCompressionFormatName(int compressionFormat) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < 4; i++) {
@@ -487,7 +579,7 @@ public class DDSImage {
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 ddsCaps2; // Advanced capabilities including cubemap support
int ddsCapsReserved1;
int ddsCapsReserved2;
int textureStage; // stage in multitexture cascade
@@ -569,15 +661,15 @@ public class DDSImage {
buf.putInt(textureStage);
}
- private static final int size() {
+ private static int size() {
return 124;
}
- private static final int pfSize() {
+ private static int pfSize() {
return 32;
}
- private static final int writtenSize() {
+ private static int writtenSize() {
return 128;
}
}
@@ -698,9 +790,7 @@ public class DDSImage {
depth = 1;
}
- int blockSize = computeCompressedBlockSize(getWidth(), getHeight(), depth, getCompressionFormat());
-
- header.pitchOrLinearSize = blockSize;
+ header.pitchOrLinearSize = computeCompressedBlockSize(getWidth(), getHeight(), depth, getCompressionFormat());
header.flags |= DDSD_LINEARSIZE;
}
}
@@ -744,6 +834,44 @@ public class DDSImage {
}
}
+ private int sideSizeInBytes() {
+ int numLevels = getNumMipMaps();
+ if (numLevels == 0) {
+ numLevels = 1;
+ }
+
+ int size = 0;
+ for (int i = 0; i < numLevels; i++) {
+ size += mipMapSizeInBytes(i);
+ }
+
+ return size;
+ }
+
+ private int sideShiftInBytes(int side) {
+ int[] sides = {
+ DDSCAPS2_CUBEMAP_POSITIVEX,
+ DDSCAPS2_CUBEMAP_NEGATIVEX,
+ DDSCAPS2_CUBEMAP_POSITIVEY,
+ DDSCAPS2_CUBEMAP_NEGATIVEY,
+ DDSCAPS2_CUBEMAP_POSITIVEZ,
+ DDSCAPS2_CUBEMAP_NEGATIVEZ
+ };
+
+ int shift = 0;
+ int sideSize = sideSizeInBytes();
+ for (int i = 0; i < sides.length; i++) {
+ int temp = sides[i];
+ if ((temp & side) != 0) {
+ return shift;
+ }
+
+ shift += sideSize;
+ }
+
+ throw new RuntimeException("Illegal side: " + side);
+ }
+
private boolean printIfRecognized(PrintStream tty, int flags, int flag, String what) {
if ((flags & flag) != 0) {
tty.println(what);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 17:58:23 +0000