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Code Issues Releases Wiki Activity

Fix JPG function referencing detached heap. Also, optimize WASM module output.

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codedread 2020-03-15 15:33:36 -07:00
parent 9dc09e22f4
commit 3ad0fa4473
5 changed files with 12 additions and 9 deletions
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9
build/webp-shim/Makefile
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@ -12,12 +12,15 @@ debug: ${OUT_TARGET}
clean: clean:
rm -rf ${OUT_PATH}/${OUT_NAME}.* rm -rf ${OUT_PATH}/${OUT_NAME}.*
${OUT_TARGET}: ${SHIM_SRC} # Debug:
emcc -O3 \ # -O0
# Optimizations:
# -Os --llvm-lto 1
${OUT_TARGET}: ${SHIM_SRC} Makefile
emcc -Os --llvm-lto 1 \
-s WASM=1 \ -s WASM=1 \
-s EXTRA_EXPORTED_RUNTIME_METHODS='["cwrap"]' \ -s EXTRA_EXPORTED_RUNTIME_METHODS='["cwrap"]' \
-s ALLOW_MEMORY_GROWTH=1 \ -s ALLOW_MEMORY_GROWTH=1 \
-s ASSERTIONS=1 \
-I stb \ -I stb \
-I libwebp \ -I libwebp \
${LIBWEBP_SRC} \ ${LIBWEBP_SRC} \

2
build/webp-shim/src/webp.c
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@ -63,7 +63,7 @@ void write_image_to_mem(void* context, void* data, int size) {
uint8_t* decode_webp_to_rgba(uint8_t* webp_ptr, size_t size, int* width, int* height) { uint8_t* decode_webp_to_rgba(uint8_t* webp_ptr, size_t size, int* width, int* height) {
if (!webp_ptr) { if (!webp_ptr) {
printf("webp_ptr is NULL"); printf("decode_webp_to_rgba() called with NULL webp_ptr");
} }
if (!WebPGetInfo(webp_ptr, size, width, height)) { if (!WebPGetInfo(webp_ptr, size, width, height)) {
fprintf(stderr, "WebPGetInfo() returned an error\n"); fprintf(stderr, "WebPGetInfo() returned an error\n");

2
image/webp-shim/webp-shim-module.js
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BIN
image/webp-shim/webp-shim-module.wasm
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8
image/webp-shim/webp-shim.js
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@ -20,8 +20,8 @@ function loadWebPShimApi() {
return loadingPromise = new Promise((resolve, reject) => { return loadingPromise = new Promise((resolve, reject) => {
const scriptEl = document.createElement('script'); const scriptEl = document.createElement('script');
scriptEl.onload = () => { scriptEl.onload = () => {
Module.print = str => console.log(str); Module.print = str => console.log(`${Date.now()}: ${str}`);
Module.printErr = str => console.error(str); Module.printErr = str => console.error(`${Date.now()}: ${str}`);
Module.onRuntimeInitialized = () => { Module.onRuntimeInitialized = () => {
api = { api = {
createWASMBuffer: Module.cwrap('create_buffer', 'number', ['number', 'number']), createWASMBuffer: Module.cwrap('create_buffer', 'number', ['number', 'number']),
@ -76,13 +76,13 @@ export function convertWebPtoJPG(webpBuffer) {
// Create a buffer of the WebP bytes that we can send into WASM-land. // Create a buffer of the WebP bytes that we can send into WASM-land.
const size = webpBuffer.byteLength; const size = webpBuffer.byteLength;
const webpWASMBuffer = api.createWASMBuffer(size); const webpWASMBuffer = api.createWASMBuffer(size);
api.heap.set(webpBuffer, webpWASMBuffer); api.module.HEAPU8.set(webpBuffer, webpWASMBuffer);
// Convert to JPG. // Convert to JPG.
const jpgHandle = api.getJPGHandle(webpWASMBuffer, size); const jpgHandle = api.getJPGHandle(webpWASMBuffer, size);
const numJPGBytes = api.getNumBytesFromHandle(jpgHandle); const numJPGBytes = api.getNumBytesFromHandle(jpgHandle);
const jpgBufPtr = api.getImageBytesFromHandle(jpgHandle); const jpgBufPtr = api.getImageBytesFromHandle(jpgHandle);
const jpgBuffer = api.heap.slice(jpgBufPtr, jpgBufPtr + numJPGBytes - 1); const jpgBuffer = api.module.HEAPU8.slice(jpgBufPtr, jpgBufPtr + numJPGBytes - 1);
// Cleanup. // Cleanup.
api.releaseImageHandle(jpgHandle); api.releaseImageHandle(jpgHandle);