]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - cl_screen.c
New shader keyword dptransparentsort (can be "sky", "distance", "hud") which forces...
[xonotic/darkplaces.git] / cl_screen.c
index bf3749ae2494c1c05d6abec7d2df709e98dfa521..0989a4b1f0454619cae985837c789cae3d51ee63 100644 (file)
@@ -39,6 +39,7 @@ cvar_t scr_loadingscreen_scale = {0, "scr_loadingscreen_scale","1", "scale facto
 cvar_t scr_loadingscreen_scale_base = {0, "scr_loadingscreen_scale_base","0", "0 = console pixels, 1 = video pixels"};
 cvar_t scr_loadingscreen_scale_limit = {0, "scr_loadingscreen_scale_limit","0", "0 = no limit, 1 = until first edge hits screen edge, 2 = until last edge hits screen edge, 3 = until width hits screen width, 4 = until height hits screen height"};
 cvar_t scr_loadingscreen_count = {0, "scr_loadingscreen_count","1", "number of loading screen files to use randomly (named loading.tga, loading2.tga, loading3.tga, ...)"};
+cvar_t scr_loadingscreen_firstforstartup = {0, "scr_loadingscreen_firstforstartup","0", "remove loading.tga from random scr_loadingscreen_count selection and only display it on client startup, 0 = normal, 1 = firstforstartup"};
 cvar_t scr_loadingscreen_barcolor = {0, "scr_loadingscreen_barcolor", "0 0 1", "rgb color of loadingscreen progress bar"};
 cvar_t scr_loadingscreen_barheight = {0, "scr_loadingscreen_barheight", "8", "the height of the loadingscreen progress bar"};
 cvar_t scr_infobar_height = {0, "scr_infobar_height", "8", "the height of the infobar items"};
@@ -143,7 +144,7 @@ void SCR_CenterPrint(const char *str)
 }
 
 
-void SCR_DrawCenterString (void)
+static void SCR_DrawCenterString (void)
 {
        char    *start;
        int             x, y;
@@ -200,7 +201,7 @@ void SCR_DrawCenterString (void)
        } while (1);
 }
 
-void SCR_CheckDrawCenterString (void)
+static void SCR_CheckDrawCenterString (void)
 {
        if (scr_center_lines > scr_erase_lines)
                scr_erase_lines = scr_center_lines;
@@ -220,7 +221,7 @@ void SCR_CheckDrawCenterString (void)
        SCR_DrawCenterString ();
 }
 
-void SCR_DrawNetGraph_DrawGraph (int graphx, int graphy, int graphwidth, int graphheight, float graphscale, const char *label, float textsize, int packetcounter, netgraphitem_t *netgraph)
+static void SCR_DrawNetGraph_DrawGraph (int graphx, int graphy, int graphwidth, int graphheight, float graphscale, const char *label, float textsize, int packetcounter, netgraphitem_t *netgraph)
 {
        netgraphitem_t *graph;
        int j, x, y, numlines;
@@ -235,9 +236,6 @@ void SCR_DrawNetGraph_DrawGraph (int graphx, int graphy, int graphwidth, int gra
        float *c;
        DrawQ_Fill(graphx, graphy, graphwidth, graphheight + textsize * 2, 0, 0, 0, 0.5, 0);
        // draw the bar graph itself
-       // advance the packet counter because it is the latest packet column being
-       // built up and should come last
-       packetcounter = (packetcounter + 1) % NETGRAPH_PACKETS;
        memset(g, 0, sizeof(g));
        for (j = 0;j < NETGRAPH_PACKETS;j++)
        {
@@ -308,11 +306,12 @@ void SCR_DrawNetGraph_DrawGraph (int graphx, int graphy, int graphwidth, int gra
 SCR_DrawNetGraph
 ==============
 */
-void SCR_DrawNetGraph (void)
+static void SCR_DrawNetGraph (void)
 {
        int i, separator1, separator2, graphwidth, graphheight, netgraph_x, netgraph_y, textsize, index, netgraphsperrow;
        float graphscale;
        netconn_t *c;
+       char vabuf[1024];
 
        if (cls.state != ca_connected)
                return;
@@ -348,7 +347,7 @@ void SCR_DrawNetGraph (void)
                                continue;
                        netgraph_x = (vid_conwidth.integer + separator2) - (1 + (index % netgraphsperrow)) * (graphwidth * 2 + separator1 + separator2);
                        netgraph_y = (vid_conheight.integer - 48 + separator2) - (1 + (index / netgraphsperrow)) * (graphheight + textsize + separator2);
-                       SCR_DrawNetGraph_DrawGraph(netgraph_x                          , netgraph_y, graphwidth, graphheight, graphscale, va("%s", svs.clients[i].name), textsize, c->outgoing_packetcounter, c->outgoing_netgraph);
+                       SCR_DrawNetGraph_DrawGraph(netgraph_x                          , netgraph_y, graphwidth, graphheight, graphscale, va(vabuf, sizeof(vabuf), "%s", svs.clients[i].name), textsize, c->outgoing_packetcounter, c->outgoing_netgraph);
                        SCR_DrawNetGraph_DrawGraph(netgraph_x + graphwidth + separator1, netgraph_y, graphwidth, graphheight, graphscale, ""                           , textsize, c->incoming_packetcounter, c->incoming_netgraph);
                        index++;
                }
@@ -360,7 +359,7 @@ void SCR_DrawNetGraph (void)
 SCR_DrawTurtle
 ==============
 */
-void SCR_DrawTurtle (void)
+static void SCR_DrawTurtle (void)
 {
        static int      count;
 
@@ -388,7 +387,7 @@ void SCR_DrawTurtle (void)
 SCR_DrawNet
 ==============
 */
-void SCR_DrawNet (void)
+static void SCR_DrawNet (void)
 {
        if (cls.state != ca_connected)
                return;
@@ -405,7 +404,7 @@ void SCR_DrawNet (void)
 DrawPause
 ==============
 */
-void SCR_DrawPause (void)
+static void SCR_DrawPause (void)
 {
        cachepic_t      *pic;
 
@@ -427,7 +426,7 @@ void SCR_DrawPause (void)
 SCR_DrawBrand
 ==============
 */
-void SCR_DrawBrand (void)
+static void SCR_DrawBrand (void)
 {
        cachepic_t      *pic;
        float           x, y;
@@ -549,9 +548,10 @@ static int SCR_DrawCurlDownload(int offset)
        float size = scr_infobar_height.value;
        Curl_downloadinfo_t *downinfo;
        char temp[256];
+       char addinfobuf[128];
        const char *addinfo;
 
-       downinfo = Curl_GetDownloadInfo(&nDownloads, &addinfo);
+       downinfo = Curl_GetDownloadInfo(&nDownloads, &addinfo, addinfobuf, sizeof(addinfobuf));
        if(!downinfo)
                return 0;
 
@@ -606,6 +606,7 @@ static int SCR_InfobarHeight(void)
        Curl_downloadinfo_t *downinfo;
        const char *addinfo;
        int nDownloads;
+       char addinfobuf[128];
 
        if (cl.time > cl.oldtime)
                scr_infobartime_off -= cl.time - cl.oldtime;
@@ -614,7 +615,7 @@ static int SCR_InfobarHeight(void)
        if(cls.qw_downloadname[0])
                offset += 1;
 
-       downinfo = Curl_GetDownloadInfo(&nDownloads, &addinfo);
+       downinfo = Curl_GetDownloadInfo(&nDownloads, &addinfo, addinfobuf, sizeof(addinfobuf));
        if(downinfo)
        {
                offset += (nDownloads + (addinfo ? 1 : 0));
@@ -630,7 +631,7 @@ static int SCR_InfobarHeight(void)
 SCR_InfoBar_f
 ==============
 */
-void SCR_InfoBar_f(void)
+static void SCR_InfoBar_f(void)
 {
        if(Cmd_Argc() == 3)
        {
@@ -649,7 +650,7 @@ void SCR_InfoBar_f(void)
 SCR_SetUpToDrawConsole
 ==================
 */
-void SCR_SetUpToDrawConsole (void)
+static void SCR_SetUpToDrawConsole (void)
 {
        // lines of console to display
        float conlines;
@@ -706,13 +707,13 @@ SCR_BeginLoadingPlaque
 
 ================
 */
-void SCR_BeginLoadingPlaque (void)
+void SCR_BeginLoadingPlaque (qboolean startup)
 {
        // save console log up to this point to log_file if it was set by configs
        Log_Start();
 
        Host_StartVideo();
-       SCR_UpdateLoadingScreen(false);
+       SCR_UpdateLoadingScreen(false, startup);
 }
 
 //=============================================================================
@@ -736,7 +737,7 @@ void R_TimeReport(const char *desc)
                GL_Finish();
        CHECKGLERROR
        r_timereport_temp = r_timereport_current;
-       r_timereport_current = Sys_DoubleTime();
+       r_timereport_current = Sys_DirtyTime();
        t = (int) ((r_timereport_current - r_timereport_temp) * 1000000.0 + 0.5);
 
        length = dpsnprintf(tempbuf, sizeof(tempbuf), "%8i %s", t, desc);
@@ -756,7 +757,7 @@ void R_TimeReport(const char *desc)
        speedstringcount += length;
 }
 
-void R_TimeReport_BeginFrame(void)
+static void R_TimeReport_BeginFrame(void)
 {
        speedstringcount = 0;
        r_speeds_timestring[0] = 0;
@@ -766,7 +767,7 @@ void R_TimeReport_BeginFrame(void)
        if (r_speeds.integer >= 2)
        {
                r_timereport_active = true;
-               r_timereport_start = r_timereport_current = Sys_DoubleTime();
+               r_timereport_start = r_timereport_current = Sys_DirtyTime();
        }
 }
 
@@ -780,7 +781,7 @@ static int R_CountLeafTriangles(const dp_model_t *model, const mleaf_t *leaf)
 
 extern cvar_t r_viewscale;
 extern float viewscalefpsadjusted;
-void R_TimeReport_EndFrame(void)
+static void R_TimeReport_EndFrame(void)
 {
        int i, j, lines, y;
        cl_locnode_t *loc;
@@ -829,7 +830,7 @@ void R_TimeReport_EndFrame(void)
                if (r_speeds.integer >= 2)
                {
                        r_timereport_active = true;
-                       r_timereport_start = r_timereport_current = Sys_DoubleTime();
+                       r_timereport_start = r_timereport_current = Sys_DirtyTime();
                }
        }
 
@@ -867,7 +868,7 @@ SCR_SizeUp_f
 Keybinding command
 =================
 */
-void SCR_SizeUp_f (void)
+static void SCR_SizeUp_f (void)
 {
        Cvar_SetValue ("viewsize",scr_viewsize.value+10);
 }
@@ -880,7 +881,7 @@ SCR_SizeDown_f
 Keybinding command
 =================
 */
-void SCR_SizeDown_f (void)
+static void SCR_SizeDown_f (void)
 {
        Cvar_SetValue ("viewsize",scr_viewsize.value-10);
 }
@@ -913,6 +914,7 @@ void CL_Screen_Init(void)
        Cvar_RegisterVariable (&scr_loadingscreen_scale_base);
        Cvar_RegisterVariable (&scr_loadingscreen_scale_limit);
        Cvar_RegisterVariable (&scr_loadingscreen_count);
+       Cvar_RegisterVariable (&scr_loadingscreen_firstforstartup);
        Cvar_RegisterVariable (&scr_loadingscreen_barcolor);
        Cvar_RegisterVariable (&scr_loadingscreen_barheight);
        Cvar_RegisterVariable (&scr_infobar_height);
@@ -990,6 +992,7 @@ void SCR_ScreenShot_f (void)
        unsigned char *buffer2;
        qboolean jpeg = (scr_screenshot_jpeg.integer != 0);
        qboolean png = (scr_screenshot_png.integer != 0) && !jpeg;
+       char vabuf[1024];
 
        if (Cmd_Argc() == 2)
        {
@@ -1029,9 +1032,9 @@ void SCR_ScreenShot_f (void)
 
                // find a file name to save it to
                for (shotnumber100 = 0;shotnumber100 < 100;shotnumber100++)
-                       if (!FS_SysFileExists(va("%s/screenshots/%s-%02d.tga", fs_gamedir, prefix_name, shotnumber100))
-                        && !FS_SysFileExists(va("%s/screenshots/%s-%02d.jpg", fs_gamedir, prefix_name, shotnumber100))
-                        && !FS_SysFileExists(va("%s/screenshots/%s-%02d.png", fs_gamedir, prefix_name, shotnumber100)))
+                       if (!FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s-%02d.tga", fs_gamedir, prefix_name, shotnumber100))
+                        && !FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s-%02d.jpg", fs_gamedir, prefix_name, shotnumber100))
+                        && !FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s-%02d.png", fs_gamedir, prefix_name, shotnumber100)))
                                break;
                if (shotnumber100 >= 100)
                {
@@ -1060,9 +1063,9 @@ void SCR_ScreenShot_f (void)
 
                // find a file name to save it to
                for (;shotnumber < 1000000;shotnumber++)
-                       if (!FS_SysFileExists(va("%s/screenshots/%s%06d.tga", fs_gamedir, prefix_name, shotnumber))
-                        && !FS_SysFileExists(va("%s/screenshots/%s%06d.jpg", fs_gamedir, prefix_name, shotnumber))
-                        && !FS_SysFileExists(va("%s/screenshots/%s%06d.png", fs_gamedir, prefix_name, shotnumber)))
+                       if (!FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s%06d.tga", fs_gamedir, prefix_name, shotnumber))
+                        && !FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s%06d.jpg", fs_gamedir, prefix_name, shotnumber))
+                        && !FS_SysFileExists(va(vabuf, sizeof(vabuf), "%s/screenshots/%s%06d.png", fs_gamedir, prefix_name, shotnumber)))
                                break;
                if (shotnumber >= 1000000)
                {
@@ -1097,7 +1100,7 @@ void SCR_ScreenShot_f (void)
        Mem_Free (buffer2);
 }
 
-void SCR_CaptureVideo_BeginVideo(void)
+static void SCR_CaptureVideo_BeginVideo(void)
 {
        double r, g, b;
        unsigned int i;
@@ -1132,7 +1135,7 @@ void SCR_CaptureVideo_BeginVideo(void)
        cls.capturevideo.soundchannels = S_GetSoundChannels();
        cls.capturevideo.startrealtime = realtime;
        cls.capturevideo.frame = cls.capturevideo.lastfpsframe = 0;
-       cls.capturevideo.starttime = cls.capturevideo.lastfpstime = Sys_DoubleTime();
+       cls.capturevideo.starttime = cls.capturevideo.lastfpstime = realtime;
        cls.capturevideo.soundsampleframe = 0;
        cls.capturevideo.realtime = cl_capturevideo_realtime.integer != 0;
        cls.capturevideo.screenbuffer = (unsigned char *)Mem_Alloc(tempmempool, vid.width * vid.height * 4);
@@ -1290,7 +1293,7 @@ static void SCR_ScaleDownBGRA(unsigned char *in, int inw, int inh, unsigned char
        }
 }
 
-void SCR_CaptureVideo_VideoFrame(int newframestepframenum)
+static void SCR_CaptureVideo_VideoFrame(int newframestepframenum)
 {
        int x = 0, y = 0;
        int width = cls.capturevideo.width, height = cls.capturevideo.height;
@@ -1311,7 +1314,7 @@ void SCR_CaptureVideo_VideoFrame(int newframestepframenum)
        if(cl_capturevideo_printfps.integer)
        {
                char buf[80];
-               double t = Sys_DoubleTime();
+               double t = realtime;
                if(t > cls.capturevideo.lastfpstime + 1)
                {
                        double fps1 = (cls.capturevideo.frame - cls.capturevideo.lastfpsframe) / (t - cls.capturevideo.lastfpstime + 0.0000001);
@@ -1330,7 +1333,7 @@ void SCR_CaptureVideo_SoundFrame(const portable_sampleframe_t *paintbuffer, size
        cls.capturevideo.soundframe(paintbuffer, length);
 }
 
-void SCR_CaptureVideo(void)
+static void SCR_CaptureVideo(void)
 {
        int newframenum;
        if (cl_capturevideo.integer)
@@ -1475,7 +1478,7 @@ void SHOWLMP_decodehide(void)
 {
        int i;
        char *lmplabel;
-       lmplabel = MSG_ReadString();
+       lmplabel = MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring));
        for (i = 0;i < cl.num_showlmps;i++)
                if (cl.showlmps[i].isactive && strcmp(cl.showlmps[i].label, lmplabel) == 0)
                {
@@ -1489,17 +1492,17 @@ void SHOWLMP_decodeshow(void)
        int k;
        char lmplabel[256], picname[256];
        float x, y;
-       strlcpy (lmplabel,MSG_ReadString(), sizeof (lmplabel));
-       strlcpy (picname, MSG_ReadString(), sizeof (picname));
+       strlcpy (lmplabel,MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof (lmplabel));
+       strlcpy (picname, MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof (picname));
        if (gamemode == GAME_NEHAHRA) // LordHavoc: nasty old legacy junk
        {
-               x = MSG_ReadByte();
-               y = MSG_ReadByte();
+               x = MSG_ReadByte(&cl_message);
+               y = MSG_ReadByte(&cl_message);
        }
        else
        {
-               x = MSG_ReadShort();
-               y = MSG_ReadShort();
+               x = MSG_ReadShort(&cl_message);
+               y = MSG_ReadShort(&cl_message);
        }
        if (!cl.showlmps || cl.num_showlmps >= cl.max_showlmps)
        {
@@ -1637,7 +1640,6 @@ static void SCR_DrawTouchscreenOverlay(void)
        }
 }
 
-extern void R_UpdateFog(void);
 void R_ClearScreen(qboolean fogcolor)
 {
        float clearcolor[4];
@@ -1656,14 +1658,9 @@ void R_ClearScreen(qboolean fogcolor)
        GL_Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (vid.stencil ? GL_STENCIL_BUFFER_BIT : 0), clearcolor, 1.0f, 128);
 }
 
-qboolean CL_VM_UpdateView (void);
-void SCR_DrawConsole (void);
-void R_Shadow_EditLights_DrawSelectedLightProperties(void);
-
 int r_stereo_side;
 
-extern void Sbar_ShowFPS(void);
-void SCR_DrawScreen (void)
+static void SCR_DrawScreen (void)
 {
        Draw_Frame();
 
@@ -1892,7 +1889,7 @@ static void SCR_SetLoadingScreenTexture(void)
 void SCR_UpdateLoadingScreenIfShown(void)
 {
        if(loadingscreendone)
-               SCR_UpdateLoadingScreen(loadingscreencleared);
+               SCR_UpdateLoadingScreen(loadingscreencleared, false);
 }
 
 void SCR_PushLoadingScreen (qboolean redraw, const char *msg, float len_in_parent)
@@ -2031,6 +2028,7 @@ static void SCR_DrawLoadingScreen_SharedSetup (qboolean clear)
 {
        r_viewport_t viewport;
        float x, y, w, h, sw, sh, f;
+       char vabuf[1024];
        // release mouse grab while loading
        if (!vid.fullscreen)
                VID_SetMouse(false, false, false);
@@ -2047,7 +2045,7 @@ static void SCR_DrawLoadingScreen_SharedSetup (qboolean clear)
        R_Mesh_Start();
        R_EntityMatrix(&identitymatrix);
        // draw the loading plaque
-       loadingscreenpic = Draw_CachePic_Flags (loadingscreenpic_number ? va("gfx/loading%d", loadingscreenpic_number+1) : "gfx/loading", loadingscreenpic_number ? CACHEPICFLAG_NOTPERSISTENT : 0);
+       loadingscreenpic = Draw_CachePic_Flags (loadingscreenpic_number ? va(vabuf, sizeof(vabuf), "gfx/loading%d", loadingscreenpic_number+1) : "gfx/loading", loadingscreenpic_number ? CACHEPICFLAG_NOTPERSISTENT : 0);
 
        w = loadingscreenpic->width;
        h = loadingscreenpic->height;
@@ -2129,7 +2127,7 @@ static void SCR_DrawLoadingScreen_SharedFinish (qboolean clear)
        VID_Finish();
 }
 
-void SCR_UpdateLoadingScreen (qboolean clear)
+void SCR_UpdateLoadingScreen (qboolean clear, qboolean startup)
 {
        keydest_t       old_key_dest;
        int                     old_key_consoleactive;
@@ -2145,7 +2143,17 @@ void SCR_UpdateLoadingScreen (qboolean clear)
                clear |= loadingscreencleared;
 
        if(!loadingscreendone)
-               loadingscreenpic_number = rand() % (scr_loadingscreen_count.integer > 1 ? scr_loadingscreen_count.integer : 1);
+       {
+               if(startup && scr_loadingscreen_firstforstartup.integer)
+                       loadingscreenpic_number = 0;
+               else if(scr_loadingscreen_firstforstartup.integer)
+                       if(scr_loadingscreen_count.integer > 1)
+                               loadingscreenpic_number = rand() % (scr_loadingscreen_count.integer - 1) + 1;
+                       else
+                               loadingscreenpic_number = 0;
+               else
+                       loadingscreenpic_number = rand() % (scr_loadingscreen_count.integer > 1 ? scr_loadingscreen_count.integer : 1);
+       }
 
        if(clear)
                SCR_ClearLoadingScreenTexture();
@@ -2206,21 +2214,90 @@ extern cvar_t cl_minfps;
 extern cvar_t cl_minfps_fade;
 extern cvar_t cl_minfps_qualitymax;
 extern cvar_t cl_minfps_qualitymin;
-extern cvar_t cl_minfps_qualitypower;
-extern cvar_t cl_minfps_qualityscale;
-extern cvar_t r_viewscale_fpsscaling;
-static double cl_updatescreen_rendertime = 0;
+extern cvar_t cl_minfps_qualitymultiply;
+extern cvar_t cl_minfps_qualityhysteresis;
+extern cvar_t cl_minfps_qualitystepmax;
+extern cvar_t cl_minfps_force;
 static double cl_updatescreen_quality = 1;
-extern void Sbar_ShowFPS_Update(void);
 void CL_UpdateScreen(void)
 {
        vec3_t vieworigin;
-       double rendertime1;
-       double drawscreenstart;
+       static double drawscreenstart = 0.0;
+       double drawscreendelta;
        float conwidth, conheight;
-       float f;
        r_viewport_t viewport;
 
+       if(drawscreenstart)
+       {
+               drawscreendelta = Sys_DirtyTime() - drawscreenstart;
+               if (cl_minfps.value > 0 && (cl_minfps_force.integer || !(cls.timedemo || (cls.capturevideo.active && !cls.capturevideo.realtime))) && drawscreendelta >= 0 && drawscreendelta < 60)
+               {
+                       // quality adjustment according to render time
+                       double actualframetime;
+                       double targetframetime;
+                       double adjust;
+                       double f;
+                       double h;
+
+                       // fade lastdrawscreentime
+                       r_refdef.lastdrawscreentime += (drawscreendelta - r_refdef.lastdrawscreentime) * cl_minfps_fade.value;
+
+                       // find actual and target frame times
+                       actualframetime = r_refdef.lastdrawscreentime;
+                       targetframetime = (1.0 / cl_minfps.value);
+
+                       // we scale hysteresis by quality
+                       h = cl_updatescreen_quality * cl_minfps_qualityhysteresis.value;
+
+                       // calculate adjustment assuming linearity
+                       f = cl_updatescreen_quality / actualframetime * cl_minfps_qualitymultiply.value;
+                       adjust = (targetframetime - actualframetime) * f;
+
+                       // one sided hysteresis
+                       if(adjust > 0)
+                               adjust = max(0, adjust - h);
+
+                       // adjust > 0 if:
+                       //   (targetframetime - actualframetime) * f > h
+                       //   ((1.0 / cl_minfps.value) - actualframetime) * (cl_updatescreen_quality / actualframetime * cl_minfps_qualitymultiply.value) > (cl_updatescreen_quality * cl_minfps_qualityhysteresis.value)
+                       //   ((1.0 / cl_minfps.value) - actualframetime) * (cl_minfps_qualitymultiply.value / actualframetime) > cl_minfps_qualityhysteresis.value
+                       //   (1.0 / cl_minfps.value) * (cl_minfps_qualitymultiply.value / actualframetime) - cl_minfps_qualitymultiply.value > cl_minfps_qualityhysteresis.value
+                       //   (1.0 / cl_minfps.value) * (cl_minfps_qualitymultiply.value / actualframetime) > cl_minfps_qualityhysteresis.value + cl_minfps_qualitymultiply.value
+                       //   (1.0 / cl_minfps.value) / actualframetime > (cl_minfps_qualityhysteresis.value + cl_minfps_qualitymultiply.value) / cl_minfps_qualitymultiply.value
+                       //   (1.0 / cl_minfps.value) / actualframetime > 1.0 + cl_minfps_qualityhysteresis.value / cl_minfps_qualitymultiply.value
+                       //   cl_minfps.value * actualframetime < 1.0 / (1.0 + cl_minfps_qualityhysteresis.value / cl_minfps_qualitymultiply.value)
+                       //   actualframetime < 1.0 / cl_minfps.value / (1.0 + cl_minfps_qualityhysteresis.value / cl_minfps_qualitymultiply.value)
+                       //   actualfps > cl_minfps.value * (1.0 + cl_minfps_qualityhysteresis.value / cl_minfps_qualitymultiply.value)
+
+                       // adjust < 0 if:
+                       //   (targetframetime - actualframetime) * f < 0
+                       //   ((1.0 / cl_minfps.value) - actualframetime) * (cl_updatescreen_quality / actualframetime * cl_minfps_qualitymultiply.value) < 0
+                       //   ((1.0 / cl_minfps.value) - actualframetime) < 0
+                       //   -actualframetime) < -(1.0 / cl_minfps.value)
+                       //   actualfps < cl_minfps.value
+
+                       /*
+                       Con_Printf("adjust UP if fps > %f, adjust DOWN if fps < %f\n",
+                                       cl_minfps.value * (1.0 + cl_minfps_qualityhysteresis.value / cl_minfps_qualitymultiply.value),
+                                       cl_minfps.value);
+                       */
+
+                       // don't adjust too much at once
+                       adjust = bound(-cl_minfps_qualitystepmax.value, adjust, cl_minfps_qualitystepmax.value);
+
+                       // adjust!
+                       cl_updatescreen_quality += adjust;
+                       cl_updatescreen_quality = bound(max(0.01, cl_minfps_qualitymin.value), cl_updatescreen_quality, cl_minfps_qualitymax.value);
+               }
+               else
+               {
+                       cl_updatescreen_quality = 1;
+                       r_refdef.lastdrawscreentime = 0;
+               }
+       }
+
+       drawscreenstart = Sys_DirtyTime();
+
        Sbar_ShowFPS_Update();
 
        if (!scr_initialized || !con_initialized || !scr_refresh.integer)
@@ -2247,8 +2324,6 @@ void CL_UpdateScreen(void)
                return;
        }
 
-       rendertime1 = Sys_DoubleTime();
-
        conwidth = bound(160, vid_conwidth.value, 32768);
        conheight = bound(90, vid_conheight.value, 24576);
        if (vid_conwidth.value != conwidth)
@@ -2317,8 +2392,9 @@ void CL_UpdateScreen(void)
        R_ClearScreen(false);
        r_refdef.view.clear = false;
        r_refdef.view.isoverlay = false;
-       f = pow((float)cl_updatescreen_quality, cl_minfps_qualitypower.value) * cl_minfps_qualityscale.value;
-       r_refdef.view.quality = bound(cl_minfps_qualitymin.value, f, cl_minfps_qualitymax.value);
+
+       // calculate r_refdef.view.quality
+       r_refdef.view.quality = cl_updatescreen_quality;
 
 #ifndef USE_GLES2
        if (qglPolygonStipple)
@@ -2349,9 +2425,6 @@ void CL_UpdateScreen(void)
        }
 #endif
 
-       if (r_viewscale_fpsscaling.integer)
-               GL_Finish();
-       drawscreenstart = Sys_DoubleTime();
 #ifndef USE_GLES2
        if (R_Stereo_Active())
        {
@@ -2370,6 +2443,7 @@ void CL_UpdateScreen(void)
                SCR_DrawScreen();
 
                r_stereo_side = 1;
+               r_refdef.view.clear = true;
 
                if (r_stereo_redblue.integer || r_stereo_redgreen.integer || r_stereo_redcyan.integer)
                {
@@ -2386,22 +2460,12 @@ void CL_UpdateScreen(void)
        else
 #endif
                SCR_DrawScreen();
-       if (r_viewscale_fpsscaling.integer)
-               GL_Finish();
-       r_refdef.lastdrawscreentime = Sys_DoubleTime() - drawscreenstart;
 
        SCR_CaptureVideo();
 
        if (qglFlush)
                qglFlush(); // FIXME: should we really be using qglFlush here?
 
-       // quality adjustment according to render time
-       cl_updatescreen_rendertime += ((Sys_DoubleTime() - rendertime1) - cl_updatescreen_rendertime) * bound(0, cl_minfps_fade.value, 1);
-       if (cl_minfps.value > 0 && cl_updatescreen_rendertime > 0 && !cls.timedemo && (!cls.capturevideo.active || !cls.capturevideo.realtime))
-               cl_updatescreen_quality = 1 / (cl_updatescreen_rendertime * cl_minfps.value);
-       else
-               cl_updatescreen_quality = 1;
-
        if (!vid_activewindow)
                VID_SetMouse(false, false, false);
        else if (key_consoleactive)