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Cache the result of SDL_GetNumDisplayModes()

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It's not free when using SDL2-compat.
This commit is contained in:
Cameron Gutman
2026-03-28 21:57:51 -05:00
parent 89c8462e9e
commit 91ce7a41e5
2 changed files with 6 additions and 3 deletions
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3
app/backend/systemproperties.cpp
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@@ -244,7 +244,8 @@ void SystemProperties::refreshDisplays()
// Start at desktop mode and work our way up
bestMode = desktopMode;
for (int i = 0; i < SDL_GetNumDisplayModes(displayIndex); i++) {
int numDisplayModes = SDL_GetNumDisplayModes(displayIndex);
for (int i = 0; i < numDisplayModes; i++) {
SDL_DisplayMode mode;
if (SDL_GetDisplayMode(displayIndex, i, &mode) == 0) {
if (mode.w == desktopMode.w && mode.h == desktopMode.h) {

6
app/streaming/session.cpp
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@@ -1423,7 +1423,8 @@ void Session::updateOptimalWindowDisplayMode()
if (!matchVideo) {
// Start with the native desktop resolution and try to find
// the highest refresh rate that our stream FPS evenly divides.
for (int i = 0; i < SDL_GetNumDisplayModes(displayIndex); i++) {
int numDisplayModes = SDL_GetNumDisplayModes(displayIndex);
for (int i = 0; i < numDisplayModes; i++) {
if (SDL_GetDisplayMode(displayIndex, i, &mode) == 0) {
if (mode.w == desktopMode.w && mode.h == desktopMode.h &&
mode.refresh_rate % m_StreamConfig.fps == 0) {
@@ -1446,7 +1447,8 @@ void Session::updateOptimalWindowDisplayMode()
if (bestMode.refresh_rate == 0) {
float bestModeAspectRatio = 0;
float videoAspectRatio = (float)m_ActiveVideoWidth / (float)m_ActiveVideoHeight;
for (int i = 0; i < SDL_GetNumDisplayModes(displayIndex); i++) {
int numDisplayModes = SDL_GetNumDisplayModes(displayIndex);
for (int i = 0; i < numDisplayModes; i++) {
if (SDL_GetDisplayMode(displayIndex, i, &mode) == 0) {
float modeAspectRatio = (float)mode.w / (float)mode.h;
if (mode.w >= m_ActiveVideoWidth && mode.h >= m_ActiveVideoHeight &&