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TurboJPEG: Add "copy none", progressive xform opts

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Allow progressive entropy coding to be enabled on a
transform-by-transform basis, and implement a new transform option for
disabling the copying of markers.

Closes #153
This commit is contained in:
DRC
2017-06-28 11:43:08 -05:00
parent dedce66eb5
commit dadebcd79a
11 changed files with 169 additions and 22 deletions
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24
java/org/libjpegturbo/turbojpeg/TJTransform.java
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@@ -103,21 +103,21 @@ public class TJTransform extends Rectangle {
* partial MCU blocks that cannot be transformed will be left in place, which
* will create odd-looking strips on the right or bottom edge of the image.
*/
public static final int OPT_PERFECT = 1;
public static final int OPT_PERFECT = 1;
/**
* This option will discard any partial MCU blocks that cannot be
* transformed.
*/
public static final int OPT_TRIM = 2;
public static final int OPT_TRIM = 2;
/**
* This option will enable lossless cropping.
*/
public static final int OPT_CROP = 4;
public static final int OPT_CROP = 4;
/**
* This option will discard the color data in the input image and produce
* a grayscale output image.
*/
public static final int OPT_GRAY = 8;
public static final int OPT_GRAY = 8;
/**
* This option will prevent {@link TJTransformer#transform
* TJTransformer.transform()} from outputting a JPEG image for this
@@ -125,7 +125,21 @@ public class TJTransform extends Rectangle {
* filter to capture the transformed DCT coefficients without transcoding
* them.
*/
public static final int OPT_NOOUTPUT = 16;
public static final int OPT_NOOUTPUT = 16;
/**
* This option will enable progressive entropy coding in the output image
* generated by this particular transform. Progressive entropy coding will
* generally improve compression relative to baseline entropy coding (the
* default), but it will reduce compression and decompression performance
* considerably.
*/
public static final int OPT_PROGRESSIVE = 32;
/**
* This option will prevent {@link TJTransformer#transform
* TJTransformer.transform()} from copying any extra markers (including EXIF
* and ICC profile data) from the source image to the output image.
*/
public static final int OPT_COPYNONE = 64;
/**