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[client] imgui: support high DPI by scaling framebuffer

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This allows overlays to render at correct positions on high DPI displays.
This commit is contained in:
Quantum 2021-07-22 18:57:35 -04:00 committed by Geoffrey McRae
parent 56308fcbd1
commit b5c5ecc074
2 changed files with 13 additions and 3 deletions
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8
client/src/app.c
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@ -677,6 +677,14 @@ int app_renderOverlay(struct Rect * rects, int maxRects)
const int written = const int written =
overlay->ops->render(overlay->udata, false, buffer, MAX_OVERLAY_RECTS); overlay->ops->render(overlay->udata, false, buffer, MAX_OVERLAY_RECTS);
for (int i = 0; i < written; ++i)
{
buffer[i].x *= g_state.windowScale;
buffer[i].y *= g_state.windowScale;
buffer[i].w *= g_state.windowScale;
buffer[i].h *= g_state.windowScale;
}
// It is an error to run out of rectangles, because we will not be able to // It is an error to run out of rectangles, because we will not be able to
// correctly calculate the damage of the next frame. // correctly calculate the damage of the next frame.
assert(written >= 0); assert(written >= 0);

8
client/src/main.c
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@ -179,12 +179,14 @@ static int renderThread(void * unused)
int resize = atomic_load(&g_state.lgrResize); int resize = atomic_load(&g_state.lgrResize);
if (resize) if (resize)
{ {
const ImVec2 displaySize = g_state.io->DisplaySize = (ImVec2) {
{
.x = g_state.windowW, .x = g_state.windowW,
.y = g_state.windowH .y = g_state.windowH
}; };
g_state.io->DisplaySize = displaySize; g_state.io->DisplayFramebufferScale = (ImVec2) {
.x = g_state.windowScale,
.y = g_state.windowScale,
};
if (g_state.lgr) if (g_state.lgr)
g_state.lgr->on_resize(g_state.lgrData, g_state.windowW, g_state.windowH, g_state.lgr->on_resize(g_state.lgrData, g_state.windowW, g_state.windowH,