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Return false if we couldn't update the emscripten framebuffer

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This commit is contained in:
Sam Lantinga
2025-11-10 15:53:40 -08:00
parent eccd5c03c3
commit 6a7fb838f4
1 changed files with 9 additions and 1 deletions
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10
src/video/emscripten/SDL_emscriptenframebuffer.c
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@@ -67,7 +67,7 @@ bool Emscripten_UpdateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *wind
// Send the data to the display // Send the data to the display
/* *INDENT-OFF* */ // clang-format off /* *INDENT-OFF* */ // clang-format off
MAIN_THREAD_EM_ASM({ int updated = MAIN_THREAD_EM_ASM_INT({
var w = $0; var w = $0;
var h = $1; var h = $1;
var pixels = $2; var pixels = $2;
@@ -79,6 +79,9 @@ bool Emscripten_UpdateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *wind
var SDL3 = Module['SDL3']; var SDL3 = Module['SDL3'];
if (SDL3.ctxCanvas !== canvas) { if (SDL3.ctxCanvas !== canvas) {
SDL3.ctx = Browser.createContext(canvas, false, true); SDL3.ctx = Browser.createContext(canvas, false, true);
if (!SDL3.ctx) {
return false;
}
SDL3.ctxCanvas = canvas; SDL3.ctxCanvas = canvas;
} }
if (SDL3.w !== w || SDL3.h !== h || SDL3.imageCtx !== SDL3.ctx) { if (SDL3.w !== w || SDL3.h !== h || SDL3.imageCtx !== SDL3.ctx) {
@@ -98,9 +101,14 @@ bool Emscripten_UpdateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *wind
data32.set(HEAP32.subarray(src, src + data32.length)); data32.set(HEAP32.subarray(src, src + data32.length));
SDL3.ctx.putImageData(SDL3.image, 0, 0); SDL3.ctx.putImageData(SDL3.image, 0, 0);
return true;
}, surface->w, surface->h, surface->pixels, data->canvas_id); }, surface->w, surface->h, surface->pixels, data->canvas_id);
/* *INDENT-ON* */ // clang-format on /* *INDENT-ON* */ // clang-format on
if (!updated) {
return SDL_SetError("Couldn't create context for canvas update");
}
if (emscripten_has_asyncify() && SDL_GetHintBoolean(SDL_HINT_EMSCRIPTEN_ASYNCIFY, true)) { if (emscripten_has_asyncify() && SDL_GetHintBoolean(SDL_HINT_EMSCRIPTEN_ASYNCIFY, true)) {
// give back control to browser for screen refresh // give back control to browser for screen refresh
emscripten_sleep(0); emscripten_sleep(0);