add webgpu canvas support

austinEng · Sep 28, 2019 · 44a16c5 · 44a16c5
1 parent ef164cf
commit 44a16c5
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Showing 3 changed files with 14 additions and 0 deletions.
diff --git a/src/library_html5.js b/src/library_html5.js
@@ -2598,6 +2598,16 @@ var LibraryJSEvents = {
     WebGPU.initManagers();
     return WebGPU.mgrDevice.create(Module['preinitializedWebGPUDevice']);
   },
+
+  emscripten_webgpu_get_current_texture__sig: 'i',
+  emscripten_webgpu_get_current_texture: 'emscripten_webgpu_do_get_current_texture',
+  emscripten_webgpu_do_get_current_texture__deps: ['$WebGPU'],
+  emscripten_webgpu_do_get_current_texture: function() {
+    var swapchain = Module['preinitializedWebGPUSwapChain'];
+    assert(swapchain);
+    WebGPU.initManagers();
+    return WebGPU.mgrTexture.create(swapchain.getCurrentTexture());
+  },
 #endif
 
 #if USE_PTHREADS

diff --git a/src/library_webgpu.js b/src/library_webgpu.js
@@ -49,6 +49,8 @@
 var LibraryWebGPU = {
   $WebGPU: {
     initManagers: function() {
+      if (this.mgrDevice) return;
+
       function makeManager() {
         return {
           objects: [undefined],

diff --git a/system/include/emscripten/html5.h b/system/include/emscripten/html5.h
@@ -504,7 +504,9 @@ extern void *emscripten_webgl2_get_proc_address(const char *name);
 extern void *emscripten_webgl_get_proc_address(const char *name);
 
 typedef struct DawnDeviceImpl* DawnDevice;
+typedef struct DawnTextureImpl* DawnTexture;
 extern DawnDevice emscripten_webgpu_get_device();
+extern DawnTexture emscripten_webgpu_get_current_texture();
 
 extern EMSCRIPTEN_RESULT emscripten_set_canvas_element_size(const char *target, int width, int height);
 extern EMSCRIPTEN_RESULT emscripten_get_canvas_element_size(const char *target, int *width, int *height);