now supports GL_EXT_stencil_two_side extension (found on NV30/R300 class cards),...

[xonotic/darkplaces.git] / r_shadow.c

diff --git a/r_shadow.c b/r_shadow.c
index 5b5d53fda680b41caa795429b935a65b064aa4da..9a660ed911cf4ae9a9997446eabd48aa019537b2 100644 (file)
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -122,7 +122,7 @@ extern void R_Shadow_EditLights_Init(void);
 #define SHADOWSTAGE_NONE 0
 #define SHADOWSTAGE_STENCIL 1
 #define SHADOWSTAGE_LIGHT 2
-#define SHADOWSTAGE_ERASESTENCIL 3
+#define SHADOWSTAGE_STENCILTWOSIDE 3
 
 int r_shadowstage = SHADOWSTAGE_NONE;
 int r_shadow_reloadlights = false;
@@ -179,6 +179,7 @@ cvar_t r_shadow_dlightshadows = {CVAR_SAVE, "r_shadow_dlightshadows", "1"};
 cvar_t r_shadow_showtris = {0, "r_shadow_showtris", "0"};
 cvar_t r_shadow_staticworldlights = {0, "r_shadow_staticworldlights", "1"};
 cvar_t r_shadow_cull = {0, "r_shadow_cull", "1"};
+cvar_t gl_ext_stenciltwoside = {0, "gl_ext_stenciltwoside", "1"};
 
 int c_rt_lights, c_rt_clears, c_rt_scissored;
 int c_rt_shadowmeshes, c_rt_shadowtris, c_rt_lightmeshes, c_rt_lighttris;
@@ -308,6 +309,7 @@ void R_Shadow_Init(void)
        Cvar_RegisterVariable(&r_shadow_showtris);
        Cvar_RegisterVariable(&r_shadow_staticworldlights);
        Cvar_RegisterVariable(&r_shadow_cull);
+       Cvar_RegisterVariable(&gl_ext_stenciltwoside);
        if (gamemode == GAME_TENEBRAE)
        {
                Cvar_SetValue("r_shadow_gloss", 2);
@@ -719,6 +721,8 @@ void R_Shadow_Stage_Begin(void)
 
        if (r_shadow_texture3d.integer && !gl_texture3d)
                Cvar_SetValueQuick(&r_shadow_texture3d, 0);
+       if (gl_ext_stenciltwoside.integer && !gl_support_stenciltwoside)
+               Cvar_SetValueQuick(&gl_ext_stenciltwoside, 0);
 
        if (!r_shadow_attenuation2dtexture
         || (!r_shadow_attenuation3dtexture && r_shadow_texture3d.integer)
@@ -778,9 +782,24 @@ void R_Shadow_Stage_ShadowVolumes(void)
        qglDepthFunc(GL_LESS);
        qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
        qglEnable(GL_STENCIL_TEST);
-       qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-       qglStencilFunc(GL_ALWAYS, 128, 0xFF);
-       r_shadowstage = SHADOWSTAGE_STENCIL;
+       qglStencilFunc(GL_ALWAYS, 128, ~0);
+       if (gl_ext_stenciltwoside.integer)
+       {
+               r_shadowstage = SHADOWSTAGE_STENCILTWOSIDE;
+               qglEnable(GL_STENCIL_TEST_TWO_SIDE_EXT);
+        qglActiveStencilFaceEXT(GL_FRONT); // quake is backwards, this is back faces
+               qglStencilMask(~0);
+               qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
+        qglActiveStencilFaceEXT(GL_BACK); // quake is backwards, this is front faces
+               qglStencilMask(~0);
+               qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
+       }
+       else
+       {
+               r_shadowstage = SHADOWSTAGE_STENCIL;
+               qglStencilMask(~0);
+               qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+       }
        GL_Clear(GL_STENCIL_BUFFER_BIT);
        c_rt_clears++;
        // LordHavoc note: many shadow volumes reside entirely inside the world
@@ -807,6 +826,9 @@ void R_Shadow_Stage_LightWithoutShadows(void)
        qglDepthFunc(GL_EQUAL);
        qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
        qglDisable(GL_STENCIL_TEST);
+       if (gl_support_stenciltwoside)
+               qglDisable(GL_STENCIL_TEST_TWO_SIDE_EXT);
+       qglStencilMask(~0);
        qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
        qglStencilFunc(GL_EQUAL, 128, 0xFF);
        r_shadowstage = SHADOWSTAGE_LIGHT;
@@ -828,6 +850,9 @@ void R_Shadow_Stage_LightWithShadows(void)
        qglDepthFunc(GL_EQUAL);
        qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
        qglEnable(GL_STENCIL_TEST);
+       if (gl_support_stenciltwoside)
+               qglDisable(GL_STENCIL_TEST_TWO_SIDE_EXT);
+       qglStencilMask(~0);
        qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
        // only draw light where this geometry was already rendered AND the
        // stencil is 128 (values other than this mean shadow)
@@ -853,6 +878,9 @@ void R_Shadow_Stage_End(void)
        qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
        qglDisable(GL_STENCIL_TEST);
        qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+       if (gl_support_stenciltwoside)
+               qglDisable(GL_STENCIL_TEST_TWO_SIDE_EXT);
+       qglStencilMask(~0);
        qglStencilFunc(GL_ALWAYS, 128, 0xFF);
        r_shadowstage = SHADOWSTAGE_NONE;
 }
@@ -2293,7 +2321,7 @@ rtexture_t *R_Shadow_LoadCubemap(const char *basename)
                for (j = 0;j < 3;j++)
                        for (i = 0;i < 6;i++)
                                Con_Printf("%s\"%s%s.tga\"", j + i > 0 ? ", " : "", basename, suffix[j][i].suffix);
-               Con_Printf(" and was unable to find any of them.\n");
+               Con_Print(" and was unable to find any of them.\n");
        }
        return cubemaptexture;
 }
@@ -2324,7 +2352,7 @@ void R_Shadow_NewWorldLight(vec3_t origin, vec3_t angles, vec3_t color, vec_t ra
 
        if (radius < 15 || DotProduct(color, color) < 0.03)
        {
-               Con_Printf("R_Shadow_NewWorldLight: refusing to create a light too small/dim\n");
+               Con_Print("R_Shadow_NewWorldLight: refusing to create a light too small/dim\n");
                return;
        }
 
@@ -2449,7 +2477,7 @@ void R_Shadow_LoadWorldLights(void)
        float origin[3], radius, color[3], angles[3], corona;
        if (cl.worldmodel == NULL)
        {
-               Con_Printf("No map loaded.\n");
+               Con_Print("No map loaded.\n");
                return;
        }
        FS_StripExtension (cl.worldmodel->name, name, sizeof (name));
@@ -2461,6 +2489,22 @@ void R_Shadow_LoadWorldLights(void)
                n = 0;
                while (*s)
                {
+                       t = s;
+                       /*
+                       shadow = true;
+                       for (;COM_Parse(t, true) && strcmp(
+                       if (COM_Parse(t, true))
+                       {
+                               if (com_token[0] == '!')
+                               {
+                                       shadow = false;
+                                       origin[0] = atof(com_token+1);
+                               }
+                               else
+                                       origin[0] = atof(com_token);
+                               if (Com_Parse(t
+                       }
+                       */
                        t = s;
                        while (*s && *s != '\n')
                                s++;
@@ -2510,7 +2554,7 @@ void R_Shadow_SaveWorldLights(void)
                return;
        if (cl.worldmodel == NULL)
        {
-               Con_Printf("No map loaded.\n");
+               Con_Print("No map loaded.\n");
                return;
        }
        FS_StripExtension (cl.worldmodel->name, name, sizeof (name));
@@ -2519,7 +2563,7 @@ void R_Shadow_SaveWorldLights(void)
        buf = NULL;
        for (light = r_shadow_worldlightchain;light;light = light->next)
        {
-               sprintf(line, "%s%f %f %f %f %f %f %f %d %s %f %f %f %f\n", light->shadow ? "" : "!", light->origin[0], light->origin[1], light->origin[2], light->radius / r_editlights_rtlightssizescale.value, light->color[0] / r_editlights_rtlightscolorscale.value, light->color[1] / r_editlights_rtlightscolorscale.value, light->color[2] / r_editlights_rtlightscolorscale.value, light->style, light->cubemapname ? light->cubemapname : "\"\"", light->corona, light->angles[0], light->angles[1], light->angles[2]);
+               sprintf(line, "%s%f %f %f %f %f %f %f %d %s %f %f %f %f\n", light->shadow ? "" : "!", light->origin[0], light->origin[1], light->origin[2], light->radius / r_editlights_rtlightssizescale.value, light->color[0] / r_editlights_rtlightscolorscale.value, light->color[1] / r_editlights_rtlightscolorscale.value, light->color[2] / r_editlights_rtlightscolorscale.value, light->style, light->cubemapname[0] ? light->cubemapname : "\"\"", light->corona, light->angles[0], light->angles[1], light->angles[2]);
                if (bufchars + (int) strlen(line) > bufmaxchars)
                {
                        bufmaxchars = bufchars + strlen(line) + 2048;
@@ -2551,7 +2595,7 @@ void R_Shadow_LoadLightsFile(void)
        float origin[3], radius, color[3], subtract, spotdir[3], spotcone, falloff, distbias;
        if (cl.worldmodel == NULL)
        {
-               Con_Printf("No map loaded.\n");
+               Con_Print("No map loaded.\n");
                return;
        }
        FS_StripExtension (cl.worldmodel->name, name, sizeof (name));
@@ -2598,7 +2642,7 @@ void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void)
 
        if (cl.worldmodel == NULL)
        {
-               Con_Printf("No map loaded.\n");
+               Con_Print("No map loaded.\n");
                return;
        }
        data = cl.worldmodel->brush.entities;
@@ -2826,12 +2870,12 @@ void R_Shadow_EditLights_Spawn_f(void)
        vec3_t color;
        if (!r_editlights.integer)
        {
-               Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
+               Con_Print("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
                return;
        }
        if (Cmd_Argc() != 1)
        {
-               Con_Printf("r_editlights_spawn does not take parameters\n");
+               Con_Print("r_editlights_spawn does not take parameters\n");
                return;
        }
        color[0] = color[1] = color[2] = 1;
@@ -2846,12 +2890,12 @@ void R_Shadow_EditLights_Edit_f(void)
        char cubemapname[1024];
        if (!r_editlights.integer)
        {
-               Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
+               Con_Print("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
                return;
        }
        if (!r_shadow_selectedlight)
        {
-               Con_Printf("No selected light.\n");
+               Con_Print("No selected light.\n");
                return;
        }
        VectorCopy(r_shadow_selectedlight->origin, origin);
@@ -3040,8 +3084,8 @@ void R_Shadow_EditLights_Edit_f(void)
        }
        else
        {
-               Con_Printf("usage: r_editlights_edit [property] [value]\n");
-               Con_Printf("Selected light's properties:\n");
+               Con_Print("usage: r_editlights_edit [property] [value]\n");
+               Con_Print("Selected light's properties:\n");
                Con_Printf("Origin : %f %f %f\n", r_shadow_selectedlight->origin[0], r_shadow_selectedlight->origin[1], r_shadow_selectedlight->origin[2]);
                Con_Printf("Angles : %f %f %f\n", r_shadow_selectedlight->angles[0], r_shadow_selectedlight->angles[1], r_shadow_selectedlight->angles[2]);
                Con_Printf("Color  : %f %f %f\n", r_shadow_selectedlight->color[0], r_shadow_selectedlight->color[1], r_shadow_selectedlight->color[2]);
@@ -3081,12 +3125,12 @@ void R_Shadow_EditLights_ToggleShadow_f(void)
 {
        if (!r_editlights.integer)
        {
-               Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
+               Con_Print("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
                return;
        }
        if (!r_shadow_selectedlight)
        {
-               Con_Printf("No selected light.\n");
+               Con_Print("No selected light.\n");
                return;
        }
        R_Shadow_NewWorldLight(r_shadow_selectedlight->origin, r_shadow_selectedlight->angles, r_shadow_selectedlight->color, r_shadow_selectedlight->radius, r_shadow_selectedlight->corona, r_shadow_selectedlight->style, !r_shadow_selectedlight->shadow, r_shadow_selectedlight->cubemapname);
@@ -3098,12 +3142,12 @@ void R_Shadow_EditLights_ToggleCorona_f(void)
 {
        if (!r_editlights.integer)
        {
-               Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
+               Con_Print("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
                return;
        }
        if (!r_shadow_selectedlight)
        {
-               Con_Printf("No selected light.\n");
+               Con_Print("No selected light.\n");
                return;
        }
        R_Shadow_NewWorldLight(r_shadow_selectedlight->origin, r_shadow_selectedlight->angles, r_shadow_selectedlight->color, r_shadow_selectedlight->radius, !r_shadow_selectedlight->corona, r_shadow_selectedlight->style, r_shadow_selectedlight->shadow, r_shadow_selectedlight->cubemapname);
@@ -3115,12 +3159,12 @@ void R_Shadow_EditLights_Remove_f(void)
 {
        if (!r_editlights.integer)
        {
-               Con_Printf("Cannot remove light when not in editing mode.  Set r_editlights to 1.\n");
+               Con_Print("Cannot remove light when not in editing mode.  Set r_editlights to 1.\n");
                return;
        }
        if (!r_shadow_selectedlight)
        {
-               Con_Printf("No selected light.\n");
+               Con_Print("No selected light.\n");
                return;
        }
        R_Shadow_FreeWorldLight(r_shadow_selectedlight);
@@ -3129,7 +3173,7 @@ void R_Shadow_EditLights_Remove_f(void)
 
 void R_Shadow_EditLights_Help_f(void)
 {
-       Con_Printf(
+       Con_Print(
 "Documentation on r_editlights system:\n"
 "Settings:\n"
 "r_editlights : enable/disable editing mode\n"