feat(png): Decompress IDAT using tinf uncompress (WIP)

2 files changed, 17 insertions, 7 deletions

diff --git a/include/tinyff/image/png.h b/include/tinyff/image/png.h
index 0b2ce34..c195951 100644
--- a/include/tinyff/image/png.h
+++ b/include/tinyff/image/png.h
@@ -11,6 +11,9 @@
 #include "tinyff/common.h"
 #include "tinyff/stream.h"
 
+// External
+#include "ext/tinf.h"
+
 
 static const unsigned char PNG_SIGNATURE[8] = {
     0x89, 'P', 'N', 'G', 0x0D, 0x0A, 0x1A, 0x0A
diff --git a/src/format/image/png.c b/src/format/image/png.c
index fc3d84a..ef30dcd 100644
--- a/src/format/image/png.c
+++ b/src/format/image/png.c
@@ -129,16 +129,23 @@ ff_result ff_png_data_handler(uint8_t *buf, size_t len, ff_png_ctx *ctx)
 {
     ff_dprintf("png: IDAT chunk received (len=%zu)\n", len);
     
-    // For now, compression handling is not implemented
-    // and instead will assume data is uncompressed
+    // Update: Now I got tinf integrated, I can actually implement this
 
-    ff_dprintf("png: IDAT handler WIP - data is assumed uncompressed\n");
-    ff_dprintf("png: IDAT handler WIP - expect undefined behavior\n");
+    uint8_t *uncompressed_data = NULL;
+    
+    // Getting the size is weird cause it could the sample count
+    // could be different based on color type and bit depth
+    // TODO: Calculate properly
+    size_t uncompressed_size = ctx->width * ctx->height; // WIP based size
+
+    uncompressed_data = malloc(uncompressed_size);
 
-    // We will need to loop over all the scanlines and apply filters
-    // But im too lazy to do that right now
-    // TODO implement
+    if (!uncompressed_data) {
+        ff_dprintf("png: failed to allocate memory for uncompressed data\n");
+        return FF_RESULT_ERROR_MEMORY_ALLOCATION;
+    }
     
+    tinf_uncompress(uncompressed_data, uncompressed_size, buf, len);
 
     return FF_RESULT_WARN_NO_IMPL;
 }