added gray decoding

Author: awxkee

JxlCoder.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name             = 'JxlCoder'
-    s.version          = '1.7.1'
+    s.version          = '1.7.2'
     s.summary          = 'JXL coder for iOS and MacOS'
     s.description      = 'Provides support for JXL files in iOS and MacOS'
     s.homepage         = 'https://github.com/awxkee/jxl-coder-swift'

Sources/jxlc/CJpegXLAnimatedDecoder.mm

@@ -46,6 +46,7 @@ @implementation CJpegXLAnimatedDecoder {
 }
 
 -(nullable id)initWith:(nonnull NSData*)data error:(NSError * _Nullable *_Nullable)error {
+    dec = nullptr;
     try {
         const uint8_t* ptr = reinterpret_cast<const uint8_t*>([data bytes]);
         mSrc.resize([data length]);

Sources/jxlc/CJpegXLAnimatedEncoder.mm

@@ -53,6 +53,7 @@ -(nullable id)initWith:(int)width height:(int)height
                quality:(int)quality 
          decodingSpeed:(JXLEncoderDecodingSpeed)decodingSpeed
                  error:(NSError * _Nullable *_Nullable)error {
+    enc = nullptr;
     JxlPixelType jColorspace;
     JxlCompressionOption jCompressionOption;
 
@@ -106,7 +107,8 @@ -(nullable void*)addFrame:(nonnull JXLSystemImage *)platformImage duration:(int)
         if (enc->getJxlPixelType() == rgb) {
             auto resizedVector = [RgbRgbaConverter convertRGBAtoRGB:buf width:width height:height];
             if (resizedVector.size() == 1) {
-                *error = [[NSError alloc] initWithDomain:@"JXLCoder" code:500 userInfo:@{ NSLocalizedDescriptionKey: @"Cannot convert RGBA pixels to RGB" }];
+                *error = [[NSError alloc] initWithDomain:@"JXLCoder" code:500
+                                                userInfo:@{ NSLocalizedDescriptionKey: @"Cannot convert RGBA pixels to RGB" }];
                 return nil;
             }
             buf = resizedVector;

Sources/jxlc/JxlAnimatedDecoder.hpp

@@ -76,6 +76,11 @@ class JxlAnimatedDecoder {
             std::string str = "Cannot create decoder";
             throw AnimatedDecoderError(str);
         }
+        
+        if (JXL_DEC_SUCCESS != JxlDecoderSetUnpremultiplyAlpha(dec.get(), JXL_TRUE)) {
+            return false;
+        }
+        
         if (JXL_DEC_SUCCESS !=
             JxlDecoderSubscribeEvents(dec.get(), JXL_DEC_BASIC_INFO |
                                                  JXL_DEC_COLOR_ENCODING |
@@ -146,18 +151,18 @@ class JxlAnimatedDecoder {
                 }
             } else if (status == JXL_DEC_COLOR_ENCODING) {
                 size_t iccSize;
-                if (JXL_DEC_SUCCESS !=
-                    JxlDecoderGetICCProfileSize(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
-                                                &iccSize)) {
-                    std::string str = "Cannot retreive color info";
-                    throw AnimatedDecoderError(str);
+                if (JXL_DEC_SUCCESS ==
+                    JxlDecoderGetICCProfileSize(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA, &iccSize)) {
+                    iccProfile.resize(iccSize);
+                    if (JXL_DEC_SUCCESS != JxlDecoderGetColorAsICCProfile(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
+                                                                          iccProfile.data(), iccProfile.size())) {
+                        std::string str = "Cannot retreive color icc profile";
+                        throw AnimatedDecoderError(str);
+                    }
+                } else {
+                    iccProfile.resize(0);
                 }
                 iccProfile.resize(iccSize);
-                if (JXL_DEC_SUCCESS != JxlDecoderGetColorAsICCProfile(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
-                                                                      iccProfile.data(), iccProfile.size())) {
-                    std::string str = "Cannot retreive color icc profile";
-                    throw AnimatedDecoderError(str);
-                }
             } else if (status == JXL_DEC_SUCCESS) {
                 JxlDecoderRewind(dec.get());
                 JxlDecoderSubscribeEvents(dec.get(), JXL_DEC_FRAME | JXL_DEC_FULL_IMAGE);

Sources/jxlc/JxlInternalCoder.mm

@@ -327,11 +327,19 @@ - (nullable JXLSystemImage *)decode:(nonnull NSInputStream *)inputStream
             colorSpace = CGColorSpaceCreateWithICCData(iccData);
             CFRelease(iccData);
         } else {
-            colorSpace = CGColorSpaceCreateDeviceRGB();
+            if (components > 1) {
+                colorSpace = CGColorSpaceCreateDeviceRGB();
+            } else {
+                colorSpace = CGColorSpaceCreateDeviceGray();
+            }
         }
 
         if (!colorSpace) {
-            colorSpace = CGColorSpaceCreateDeviceRGB();
+            if (components > 1) {
+                colorSpace = CGColorSpaceCreateDeviceRGB();
+            } else {
+                colorSpace = CGColorSpaceCreateDeviceGray();
+            }
         }
 
         int stride = components*(int)xSize * (int)(useFloats ? sizeof(uint16_t) : sizeof(uint8_t));

Sources/jxlc/JxlWorker.cpp

@@ -58,8 +58,10 @@ bool DecodeJpegXlOneShot(const uint8_t *jxl, size_t size,
                                                        runner.get())) {
         return false;
     }
-
-    JxlDecoderSetUnpremultiplyAlpha(dec.get(), JXL_TRUE);
+    
+    if (JXL_DEC_SUCCESS != JxlDecoderSetUnpremultiplyAlpha(dec.get(), JXL_TRUE)) {
+        return false;
+    }
 
     JxlBasicInfo info;
     JxlPixelFormat format;
@@ -95,10 +97,6 @@ bool DecodeJpegXlOneShot(const uint8_t *jxl, size_t size,
             bitDepth = info.bits_per_sample;
             *depth = info.bits_per_sample;
             int baseComponents = info.num_color_channels;
-            // Will not support mono
-            if (baseComponents < 3) {
-                baseComponents = 3;
-            }
             if (info.num_extra_channels > 0) {
                 baseComponents = 4;
             }
@@ -129,19 +127,18 @@ bool DecodeJpegXlOneShot(const uint8_t *jxl, size_t size,
             //            if (JXL_DEC_SUCCESS != JxlDecoderGetColorAsEncodedProfile(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA, &colorEncoding)) {
             //                return false;
             //            }
-
-            size_t icc_size;
-            if (JXL_DEC_SUCCESS !=
-                JxlDecoderGetICCProfileSize(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
-                                            &icc_size)) {
-                return false;
+            
+            size_t iccSize;
+            if (JXL_DEC_SUCCESS ==
+                JxlDecoderGetICCProfileSize(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA, &iccSize)) {
+                iccProfile->resize(iccSize);
+                if (JXL_DEC_SUCCESS != JxlDecoderGetColorAsICCProfile(dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
+                                                                      iccProfile->data(), iccProfile->size())) {
+                                                                          return false;
+                                                                      }
+            } else {
+                iccProfile->resize(0);
             }
-            iccProfile->resize(icc_size);
-            if (JXL_DEC_SUCCESS != JxlDecoderGetColorAsICCProfile(
-                                                                  dec.get(), JXL_COLOR_PROFILE_TARGET_DATA,
-                                                                  iccProfile->data(), iccProfile->size())) {
-                                                                      return false;
-                                                                  }
         } else if (status == JXL_DEC_NEED_IMAGE_OUT_BUFFER) {
             size_t buffer_size;
             if (JXL_DEC_SUCCESS !=

Sources/jxlc/include/module.modulemap

@@ -1,5 +1,5 @@
 module jxlc {
-    umbrella header "../JxlInternalCoder.h"
+    header "../JxlInternalCoder.h"
     header "../JxlConstruction.h"
     header "../JxlJpegLiEncoder.h"
     export *