diff options
Diffstat (limited to 'examples/wasm-minipng/src/lib.rs')
-rw-r--r-- | examples/wasm-minipng/src/lib.rs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/examples/wasm-minipng/src/lib.rs b/examples/wasm-minipng/src/lib.rs new file mode 100644 index 0000000..aebf88b --- /dev/null +++ b/examples/wasm-minipng/src/lib.rs @@ -0,0 +1,15 @@ +#[no_mangle] +pub unsafe fn decode_png(input: *const u8, input_len: usize, output: *mut u8, output_len: usize) -> usize { + let input = core::slice::from_raw_parts(input, input_len); + let output = core::slice::from_raw_parts_mut(output, output_len); + let Ok(header) = minipng::decode_png_header(input) else { + return 0; + }; + let required_bytes = header.required_bytes(); + if output_len >= required_bytes { + if minipng::decode_png(input, output).is_err() { + return 0; + } + } + required_bytes +} |