refactor(common): Add a context base for every ff_*_ctx

1 files changed, 2 insertions, 3 deletions

diff --git a/include/tinyff/image/png.h b/include/tinyff/image/png.h
index 05d5846..6941b42 100644
--- a/include/tinyff/image/png.h
+++ b/include/tinyff/image/png.h
@@ -25,6 +25,8 @@ typedef enum {
 } ff_png_mode;
 
 typedef struct {
+    FF_BASE
+    
     // Raw stream handle
     ff_stream *raw;
 
@@ -52,9 +54,6 @@ typedef struct {
     uint8_t* palette;
     uint32_t palette_size;
 
-    bool valid;
-    ff_result last_error;
-
 } ff_png_ctx;
 
 // Small BpP helper function