implemented r_transparent_alphatocoverage 2 which promotes alphablend if
[xonotic/darkplaces.git] / gl_rmain.c
index 9158696..35b11c2 100644 (file)
@@ -72,7 +72,7 @@ cvar_t r_farclip_world = {0, "r_farclip_world", "2", "adds map size to farclip m
 cvar_t r_nearclip = {0, "r_nearclip", "1", "distance from camera of nearclip plane" };
 cvar_t r_deformvertexes = {0, "r_deformvertexes", "1", "allows use of deformvertexes in shader files (can be turned off to check performance impact)"};
 cvar_t r_transparent = {0, "r_transparent", "1", "allows use of transparent surfaces (can be turned off to check performance impact)"};
-cvar_t r_transparent_alphatocoverage = {0, "r_transparent_alphatocoverage", "0", "enables alpha-to-coverage antialiasing technique on alphatest surfaces when using vid_samples 2 or higher"};
+cvar_t r_transparent_alphatocoverage = {0, "r_transparent_alphatocoverage", "1", "enables GL_ALPHA_TO_COVERAGE antialiasing technique on alphablend and alphatest surfaces when using vid_samples 2 or higher"};
 cvar_t r_showoverdraw = {0, "r_showoverdraw", "0", "shows overlapping geometry"};
 cvar_t r_showbboxes = {0, "r_showbboxes", "0", "shows bounding boxes of server entities, value controls opacity scaling (1 = 10%,  10 = 100%)"};
 cvar_t r_showsurfaces = {0, "r_showsurfaces", "0", "1 shows surfaces as different colors, or a value of 2 shows triangle draw order (for analyzing whether meshes are optimized for vertex cache)"};
@@ -1911,7 +1911,8 @@ void R_SetupShader_Generic(rtexture_t *first, rtexture_t *second, int texturemod
                permutation |= SHADERPERMUTATION_VERTEXTEXTUREBLEND;
        if (!second)
                texturemode = GL_MODULATE;
-       GL_AlphaToCoverage(false);
+       if (vid.allowalphatocoverage)
+               GL_AlphaToCoverage(false);
        switch (vid.renderpath)
        {
        case RENDERPATH_D3D9:
@@ -1957,7 +1958,8 @@ void R_SetupShader_DepthOrShadow(qboolean notrippy)
        unsigned int permutation = 0;
        if (r_trippy.integer && !notrippy)
                permutation |= SHADERPERMUTATION_TRIPPY;
-       GL_AlphaToCoverage(false);
+       if (vid.allowalphatocoverage)
+               GL_AlphaToCoverage(false);
        switch (vid.renderpath)
        {
        case RENDERPATH_D3D9:
@@ -1996,7 +1998,8 @@ void R_SetupShader_ShowDepth(qboolean notrippy)
                permutation |= SHADERPERMUTATION_TRIPPY;
        if (r_trippy.integer)
                permutation |= SHADERPERMUTATION_TRIPPY;
-       GL_AlphaToCoverage(false);
+       if (vid.allowalphatocoverage)
+               GL_AlphaToCoverage(false);
        switch (vid.renderpath)
        {
        case RENDERPATH_D3D9:
@@ -2148,7 +2151,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                        GL_BlendFunc(GL_ONE, GL_ZERO);
                        blendfuncflags = R_BlendFuncFlags(GL_ONE, GL_ZERO);
                }
-               GL_AlphaToCoverage(false);
+               if (vid.allowalphatocoverage)
+                       GL_AlphaToCoverage(false);
        }
        else if (rsurfacepass == RSURFPASS_DEFERREDGEOMETRY)
        {
@@ -2168,7 +2172,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                mode = SHADERMODE_DEFERREDGEOMETRY;
                GL_BlendFunc(GL_ONE, GL_ZERO);
                blendfuncflags = R_BlendFuncFlags(GL_ONE, GL_ZERO);
-               GL_AlphaToCoverage(false);
+               if (vid.allowalphatocoverage)
+                       GL_AlphaToCoverage(false);
        }
        else if (rsurfacepass == RSURFPASS_RTLIGHT)
        {
@@ -2213,7 +2218,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                        permutation |= SHADERPERMUTATION_REFLECTCUBE;
                GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
                blendfuncflags = R_BlendFuncFlags(GL_SRC_ALPHA, GL_ONE);
-               GL_AlphaToCoverage(false);
+               if (vid.allowalphatocoverage)
+                       GL_AlphaToCoverage(false);
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_FULLBRIGHT)
        {
@@ -2256,7 +2262,17 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                        permutation |= SHADERPERMUTATION_REFLECTCUBE;
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
-               GL_AlphaToCoverage(r_transparent_alphatocoverage.integer && (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST));
+               // when using alphatocoverage, we don't need alphakill
+               if (vid.allowalphatocoverage)
+               {
+                       if (r_transparent_alphatocoverage.integer)
+                       {
+                               GL_AlphaToCoverage((rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST) != 0);
+                               permutation &= ~SHADERPERMUTATION_ALPHAKILL;
+                       }
+                       else
+                               GL_AlphaToCoverage(false);
+               }
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT_DIRECTIONAL)
        {
@@ -2309,7 +2325,17 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
-               GL_AlphaToCoverage(r_transparent_alphatocoverage.integer && (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST));
+               // when using alphatocoverage, we don't need alphakill
+               if (vid.allowalphatocoverage)
+               {
+                       if (r_transparent_alphatocoverage.integer)
+                       {
+                               GL_AlphaToCoverage((rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST) != 0);
+                               permutation &= ~SHADERPERMUTATION_ALPHAKILL;
+                       }
+                       else
+                               GL_AlphaToCoverage(false);
+               }
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT)
        {
@@ -2359,7 +2385,17 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
-               GL_AlphaToCoverage(r_transparent_alphatocoverage.integer && (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST));
+               // when using alphatocoverage, we don't need alphakill
+               if (vid.allowalphatocoverage)
+               {
+                       if (r_transparent_alphatocoverage.integer)
+                       {
+                               GL_AlphaToCoverage((rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST) != 0);
+                               permutation &= ~SHADERPERMUTATION_ALPHAKILL;
+                       }
+                       else
+                               GL_AlphaToCoverage(false);
+               }
        }
        else
        {
@@ -2445,7 +2481,17 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
-               GL_AlphaToCoverage(r_transparent_alphatocoverage.integer && (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST));
+               // when using alphatocoverage, we don't need alphakill
+               if (vid.allowalphatocoverage)
+               {
+                       if (r_transparent_alphatocoverage.integer)
+                       {
+                               GL_AlphaToCoverage((rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST) != 0);
+                               permutation &= ~SHADERPERMUTATION_ALPHAKILL;
+                       }
+                       else
+                               GL_AlphaToCoverage(false);
+               }
        }
        if(!(blendfuncflags & BLENDFUNC_ALLOWS_COLORMOD))
                colormod = dummy_colormod;
@@ -2946,7 +2992,8 @@ void R_SetupShader_DeferredLight(const rtlight_t *rtlight)
                else if (r_shadow_shadowmappcf)
                        permutation |= SHADERPERMUTATION_SHADOWMAPPCF;
        }
-       GL_AlphaToCoverage(false);
+       if (vid.allowalphatocoverage)
+               GL_AlphaToCoverage(false);
        Matrix4x4_Transform(&r_refdef.view.viewport.viewmatrix, rtlight->shadoworigin, viewlightorigin);
        Matrix4x4_Concat(&lighttoview, &r_refdef.view.viewport.viewmatrix, &rtlight->matrix_lighttoworld);
        Matrix4x4_Invert_Simple(&viewtolight, &lighttoview);
@@ -7653,6 +7700,11 @@ texture_t *R_GetCurrentTexture(texture_t *t)
        }
        else
                t->currentmaterialflags &= ~(MATERIALFLAG_REFRACTION | MATERIALFLAG_WATERSHADER | MATERIALFLAG_CAMERA);
+       if (vid.allowalphatocoverage && r_transparent_alphatocoverage.integer >= 2 && ((t->currentmaterialflags & (MATERIALFLAG_BLENDED | MATERIALFLAG_ALPHA | MATERIALFLAG_ADD | MATERIALFLAG_CUSTOMBLEND)) == (MATERIALFLAG_BLENDED | MATERIALFLAG_ALPHA)))
+       {
+               // promote alphablend to alphatocoverage (a type of alphatest) if antialiasing is on
+               t->currentmaterialflags = (t->currentmaterialflags & ~(MATERIALFLAG_BLENDED | MATERIALFLAG_ALPHA)) | MATERIALFLAG_ALPHATEST;
+       }
        if ((t->currentmaterialflags & (MATERIALFLAG_BLENDED | MATERIALFLAG_NODEPTHTEST)) == MATERIALFLAG_BLENDED && r_transparentdepthmasking.integer && !(t->basematerialflags & MATERIALFLAG_BLENDED))
                t->currentmaterialflags |= MATERIALFLAG_TRANSDEPTH;