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@@ -13,6 +13,7 @@
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#include <AzFramework/XcbNativeWindow.h>
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#include <xcb/xcb.h>
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+#include <xcb/randr.h>
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namespace AzFramework
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{
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@@ -354,10 +355,127 @@ namespace AzFramework
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////////////////////////////////////////////////////////////////////////////////////////////////
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uint32_t XcbNativeWindow::GetDisplayRefreshRate() const
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{
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- // [GFX TODO][GHI - 2678]
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- // Using 60 for now until proper support is added
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+ constexpr uint32_t defaultRefreshRate = 60;
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+ xcb_generic_error_t* error = nullptr;
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+
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+ xcb_screen_iterator_t iter = xcb_setup_roots_iterator(xcb_get_setup(m_xcbConnection));
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+ xcb_screen_t* screen = iter.data;
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+
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+ const xcb_query_extension_reply_t* extReply = xcb_get_extension_data(m_xcbConnection, &xcb_randr_id);
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+ if (!extReply || !extReply->present)
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+ {
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+ AZ_WarningOnce(XcbErrorWindow, extReply != nullptr, "Failed to get extension RandR, defaulting to display rate of %d", defaultRefreshRate);
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+ return defaultRefreshRate;
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+ }
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+
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+ int positionX = 0;
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+ int positionY = 0;
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+
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+ //Get the position of the window globally.
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+ {
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+ xcb_translate_coordinates_cookie_t translateCookie = xcb_translate_coordinates(
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+ m_xcbConnection,
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+ m_xcbWindow,
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+ screen->root,
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+ 0,
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+ 0
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+ );
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+ xcb_translate_coordinates_reply_t* translateReply = xcb_translate_coordinates_reply(
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+ m_xcbConnection,
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+ translateCookie,
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+ &error
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+ );
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+
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+ if (error || translateReply == nullptr)
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+ {
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+ AZ_Warning(XcbErrorWindow, error != nullptr, "Failed to translate window coordinates.");
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+ free(error);
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+ free(translateReply);
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+ return defaultRefreshRate;
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+ }
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+
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+ positionX = translateReply->dst_x;
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+ positionY = translateReply->dst_y;
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+ free(translateReply);
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+ }
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+
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+ xcb_randr_get_screen_resources_current_cookie_t resCookie = xcb_randr_get_screen_resources_current(m_xcbConnection, screen->root);
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+ xcb_randr_get_screen_resources_current_reply_t* resReply = xcb_randr_get_screen_resources_current_reply(
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+ m_xcbConnection,
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+ resCookie,
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+ &error);
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+
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+ if (error || resReply == nullptr)
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+ {
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+ AZ_Warning(XcbErrorWindow, error != nullptr, "Failed to get screen resources.");
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+ free(error);
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+ return defaultRefreshRate;
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+ }
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+
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+ xcb_randr_crtc_t* crtcs = xcb_randr_get_screen_resources_current_crtcs(resReply);
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+ int crtcLength = xcb_randr_get_screen_resources_current_crtcs_length(resReply);
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+
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+ uint32_t refreshRate = 0;
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+
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+ for (int i = 0; i < crtcLength; i++)
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+ {
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+ xcb_randr_get_crtc_info_cookie_t crtcInfoCookie = xcb_randr_get_crtc_info(m_xcbConnection, crtcs[i], XCB_TIME_CURRENT_TIME);
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+ xcb_randr_get_crtc_info_reply_t* crtcInfoReply = xcb_randr_get_crtc_info_reply(m_xcbConnection, crtcInfoCookie, &error);
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+
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+ if (error || crtcInfoReply == nullptr)
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+ {
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+ free(error);
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+ continue;
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+ }
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+
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+ int crtcX = crtcInfoReply->x;
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+ int crtcY = crtcInfoReply->y;
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+ int crtcW = crtcInfoReply->width;
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+ int crtcH = crtcInfoReply->height;
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+
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+ if (positionX + m_width > crtcX && positionX < crtcX + crtcW &&
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+ positionY + m_height > crtcY && positionY < crtcY + crtcH)
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+ {
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+ const uint32_t modeId = crtcInfoReply->mode;
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+
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+ xcb_randr_mode_info_t* modes = xcb_randr_get_screen_resources_current_modes(resReply);
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+ int modesLength = xcb_randr_get_screen_resources_current_modes_length(resReply);
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+
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+ for (int mi = 0; mi < modesLength; mi++)
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+ {
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+ auto mode = modes[mi];
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+ if (mode.id != modeId)
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+ continue;
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+
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+ if(mode.htotal == 0 || mode.vtotal == 0)
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+ {
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+ AZ_WarningOnce(XcbErrorWindow, false, "V/H total is 0");
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+ return defaultRefreshRate;
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+ }
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+
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+ double refreshRatePrecise = static_cast<double>(mode.dot_clock) /
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+ (mode.htotal * mode.vtotal);
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+
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+ //Most of the time the refresh rate is 159.798 or 59.98
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+ refreshRate = static_cast<uint32_t>(ceil(refreshRatePrecise));
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+ }
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+
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+ free(crtcInfoReply);
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+ break;
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+ }
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+
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+ free(crtcInfoReply);
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+ }
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+
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+ if (refreshRate == 0)
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+ {
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+ AZ_Warning(XcbErrorWindow, refreshRate == 0, "Failed to get CRTC refresh rate for window.");
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+ free(resReply);
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+ return defaultRefreshRate;
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+ }
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- return 60;
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+ free(resReply);
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+ return refreshRate;
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}
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bool XcbNativeWindow::GetFullScreenState() const
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Reece Hagan