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[client] imgui: support high DPI by scaling framebuffer
This allows overlays to render at correct positions on high DPI displays.
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@ -677,6 +677,14 @@ int app_renderOverlay(struct Rect * rects, int maxRects)
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const int written =
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overlay->ops->render(overlay->udata, false, buffer, MAX_OVERLAY_RECTS);
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for (int i = 0; i < written; ++i)
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{
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buffer[i].x *= g_state.windowScale;
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buffer[i].y *= g_state.windowScale;
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buffer[i].w *= g_state.windowScale;
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buffer[i].h *= g_state.windowScale;
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}
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// It is an error to run out of rectangles, because we will not be able to
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// correctly calculate the damage of the next frame.
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assert(written >= 0);
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@ -179,12 +179,14 @@ static int renderThread(void * unused)
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int resize = atomic_load(&g_state.lgrResize);
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if (resize)
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{
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const ImVec2 displaySize =
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{
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g_state.io->DisplaySize = (ImVec2) {
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.x = g_state.windowW,
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.y = g_state.windowH
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};
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g_state.io->DisplaySize = displaySize;
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g_state.io->DisplayFramebufferScale = (ImVec2) {
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.x = g_state.windowScale,
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.y = g_state.windowScale,
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};
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if (g_state.lgr)
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g_state.lgr->on_resize(g_state.lgrData, g_state.windowW, g_state.windowH,
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