From 3f149cc825504eb03505e2a3525e9990953ca059 Mon Sep 17 00:00:00 2001
From: Mohammad Wasif <m.wasif.balti@gmail.com>
Date: Fri, 1 Aug 2025 13:51:53 +0400
Subject: [PATCH 1/4] fixed png images rendering issues for qrcode

---
 lib/image/png.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/image/png.js b/lib/image/png.js
index 504ce8a8..ae244008 100644
--- a/lib/image/png.js
+++ b/lib/image/png.js
@@ -103,7 +103,7 @@ class PNGImage {
         Subtype: 'Image',
         Height: this.height,
         Width: this.width,
-        BitsPerComponent: 8,
+        BitsPerComponent: this.image.hasAlphaChannel ? 8 : this.image.bits,
         Filter: 'FlateDecode',
         ColorSpace: 'DeviceGray',
         Decode: [0, 1],

From 857820e5bd61d586acdc1aaa2fc0e0ddfdedd1b9 Mon Sep 17 00:00:00 2001
From: Mohammad Wasif <m.wasif.balti@gmail.com>
Date: Fri, 1 Aug 2025 15:54:32 +0400
Subject: [PATCH 2/4] updated changelog.md

---
 CHANGELOG.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0c64641..5585336c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ### Unreleased
 
+### [v0.17.2] - 2025-08-01
+
+- fixed png images rendering issues for qrcode
+ 
+
 ### [v0.17.1] - 2025-05-02
 
 - Fix null values in table cells rendering as `[object Object]`

From 3f4916c22de9eb06de2eec267a0b5d35d3d71068 Mon Sep 17 00:00:00 2001
From: Mohammad Wasif <m.wasif.balti@gmail.com>
Date: Fri, 1 Aug 2025 17:11:39 +0400
Subject: [PATCH 3/4] some lines were missing so This is the final submission

---
 lib/image/png.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/image/png.js b/lib/image/png.js
index ae244008..c5230433 100644
--- a/lib/image/png.js
+++ b/lib/image/png.js
@@ -97,13 +97,13 @@ class PNGImage {
   }
 
   finalize() {
-    if (this.alphaChannel) {
+    if (this.image.hasAlphaChannel) {
       const sMask = this.document.ref({
         Type: 'XObject',
         Subtype: 'Image',
         Height: this.height,
         Width: this.width,
-        BitsPerComponent: this.image.hasAlphaChannel ? 8 : this.image.bits,
+        BitsPerComponent: 8,
         Filter: 'FlateDecode',
         ColorSpace: 'DeviceGray',
         Decode: [0, 1],

From 4275a3b17c8dc26530b9a82fc41ca9dacc425a9d Mon Sep 17 00:00:00 2001
From: Mohammad Wasif <m.wasif.balti@gmail.com>
Date: Tue, 9 Sep 2025 13:02:07 +0400
Subject: [PATCH 4/4] removed the smask for one test case

removed the smask for one test case and test the output of that particular image is perfect
---
 lib/image/png.js       |  2 +-
 tests/unit/png.spec.js | 13 -------------
 2 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/lib/image/png.js b/lib/image/png.js
index c5230433..13407369 100644
--- a/lib/image/png.js
+++ b/lib/image/png.js
@@ -97,7 +97,7 @@ class PNGImage {
   }
 
   finalize() {
-    if (this.image.hasAlphaChannel) {
+    if (this.image.hasAlphaChannel && this.alphaChannel) {
       const sMask = this.document.ref({
         Type: 'XObject',
         Subtype: 'Image',
diff --git a/tests/unit/png.spec.js b/tests/unit/png.spec.js
index 9c6cd521..2dc20ac0 100644
--- a/tests/unit/png.spec.js
+++ b/tests/unit/png.spec.js
@@ -237,7 +237,6 @@ describe('PNGImage', () => {
       Type: 'XObject',
       Width: 32,
       DecodeParms: expect.any(PDFReference),
-      SMask: expect.any(PDFReference),
     });
 
     expect(img.obj.data.DecodeParms.data).toMatchObject({
@@ -246,18 +245,6 @@ describe('PNGImage', () => {
       Columns: 32,
       Predictor: 15,
     });
-
-    expect(img.obj.data.SMask.data).toMatchObject({
-      BitsPerComponent: 8,
-      ColorSpace: 'DeviceGray',
-      Decode: [0, 1],
-      Filter: 'FlateDecode',
-      Height: 32,
-      Length: 16,
-      Subtype: 'Image',
-      Type: 'XObject',
-      Width: 32,
-    });
   });
 
   test('Grayscale', () => {