mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-12 10:33:20 +00:00
Dion Moult
1fc15e78f2
Replaces the standalone wgpu-only clear-color spike in main_web.cpp with a real WebViewportHost implementation: surface creation via the emdawnwebgpu canvas-selector source, framebufferSize through emscripten_get_element_css_size + dpr, requestFrame as a deferred flag the RAF main_loop consumes, quit through emscripten_force_exit. main_web.cpp now does the same lifecycle the desktop initWgpu shell does: core_.initWgpu(web_limits=true) → buildPipelines → buildHiz/ Edge/Pick. The render loop runs core_.render() once per RAF tick when the host has flagged a frame pending, with a surface reconfigure on size changes. Builds clean under emcc 6.0 + emdawnwebgpu (1.4 MB wasm, 278 KB JS glue). Renders an empty scene with the configured background — the plumbing is end-to-end through the same ViewportCore code path the desktop build uses. No sidecar load yet: that lands with the emscripten_fetch streaming backend (#88).
76 lines
3.4 KiB
C++
76 lines
3.4 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#include "WebViewportHost.h"
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#include <emscripten/emscripten.h>
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#include <emscripten/html5.h>
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#include <cstring>
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#include <utility>
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WebViewportHost::WebViewportHost(std::string canvas_selector)
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: canvas_selector_(std::move(canvas_selector)) {}
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WGPUSurface WebViewportHost::createSurface(WGPUInstance instance) {
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// Emdawnwebgpu canvas-selector surface source. Same shape as
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// WGPUSurfaceSourceCanvasHTMLSelector_Emscripten in Dawn's headers.
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WGPUEmscriptenSurfaceSourceCanvasHTMLSelector canvas_desc = {};
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canvas_desc.chain.sType =
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WGPUSType_EmscriptenSurfaceSourceCanvasHTMLSelector;
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canvas_desc.selector.data = canvas_selector_.c_str();
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canvas_desc.selector.length = canvas_selector_.size();
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WGPUSurfaceDescriptor surface_desc = {};
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surface_desc.nextInChain = &canvas_desc.chain;
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return wgpuInstanceCreateSurface(instance, &surface_desc);
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}
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void WebViewportHost::framebufferSize(int& width_px, int& height_px) const {
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double w_css = 0.0, h_css = 0.0;
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// Pull the element's logical (CSS-pixel) size, then multiply by DPR
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// — matches the QWindow desktop host's framebufferSize semantics.
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emscripten_get_element_css_size(canvas_selector_.c_str(), &w_css, &h_css);
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const float ratio = dpr();
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width_px = int(w_css * double(ratio));
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height_px = int(h_css * double(ratio));
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if (width_px < 1) width_px = 1;
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if (height_px < 1) height_px = 1;
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}
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float WebViewportHost::dpr() const {
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return float(emscripten_get_device_pixel_ratio());
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}
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void WebViewportHost::requestFrame() {
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request_frame_pending_ = true;
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}
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void WebViewportHost::quit() {
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// emscripten_force_exit honours -sEXIT_RUNTIME=1; without that flag
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// the runtime swallows the call and keeps the page interactive.
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emscripten_force_exit(0);
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}
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bool WebViewportHost::consumeFrameRequest() {
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const bool pending = request_frame_pending_;
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request_frame_pending_ = false;
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return pending;
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}
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