enable offsetmapping permutations only if a normalmap exists and no bias is set

[xonotic/darkplaces.git] / gl_rmain.c

diff --git a/gl_rmain.c b/gl_rmain.c
index 3d5898f28c555d4bd286aaa8a970bfcde7891071..b2c7e6f99623eb419a2b83614e3f918cdfc7770e 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -162,6 +162,8 @@ cvar_t r_glsl_offsetmapping_reliefmapping = {CVAR_SAVE, "r_glsl_offsetmapping_re
 cvar_t r_glsl_offsetmapping_reliefmapping_steps = {CVAR_SAVE, "r_glsl_offsetmapping_reliefmapping_steps", "10", "relief mapping steps (note: too high values may be not supported by your GPU)"};
 cvar_t r_glsl_offsetmapping_reliefmapping_refinesteps = {CVAR_SAVE, "r_glsl_offsetmapping_reliefmapping_refinesteps", "5", "relief mapping refine steps (these are a binary search executed as the last step as given by r_glsl_offsetmapping_reliefmapping_steps)"};
 cvar_t r_glsl_offsetmapping_scale = {CVAR_SAVE, "r_glsl_offsetmapping_scale", "0.04", "how deep the offset mapping effect is"};
+cvar_t r_glsl_offsetmapping_lod = {CVAR_SAVE, "r_glsl_offsetmapping_lod", "0", "apply distance-based level-of-detail correction to number of offsetmappig steps, effectively making it render faster on large open-area maps"};
+cvar_t r_glsl_offsetmapping_lod_distance = {CVAR_SAVE, "r_glsl_offsetmapping_lod_distance", "32", "first LOD level distance, second level (-50% steps) is 2x of this, third (33%) - 3x etc."};
 cvar_t r_glsl_postprocess = {CVAR_SAVE, "r_glsl_postprocess", "0", "use a GLSL postprocessing shader"};
 cvar_t r_glsl_postprocess_uservec1 = {CVAR_SAVE, "r_glsl_postprocess_uservec1", "0 0 0 0", "a 4-component vector to pass as uservec1 to the postprocessing shader (only useful if default.glsl has been customized)"};
 cvar_t r_glsl_postprocess_uservec2 = {CVAR_SAVE, "r_glsl_postprocess_uservec2", "0 0 0 0", "a 4-component vector to pass as uservec2 to the postprocessing shader (only useful if default.glsl has been customized)"};
@@ -824,6 +826,8 @@ typedef struct r_glsl_permutation_s
        int loc_LightDir;
        int loc_LightPosition;
        int loc_OffsetMapping_ScaleSteps;
+       int loc_OffsetMapping_LodDistance;
+       int loc_OffsetMapping_Bias;
        int loc_PixelSize;
        int loc_ReflectColor;
        int loc_ReflectFactor;
@@ -870,9 +874,10 @@ enum
        SHADERSTATICPARM_POSTPROCESS_USERVEC2 = 3, ///< postprocess uservec2 is enabled
        SHADERSTATICPARM_POSTPROCESS_USERVEC3 = 4, ///< postprocess uservec3 is enabled
        SHADERSTATICPARM_POSTPROCESS_USERVEC4 = 5,  ///< postprocess uservec4 is enabled
-       SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS = 6 // use both alpha layers while blending materials, allows more advanced microblending
+       SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS = 6, // use both alpha layers while blending materials, allows more advanced microblending
+       SHADERSTATICPARM_OFFSETMAPPING_USELOD = 7,  ///< LOD for offsetmapping
 };
-#define SHADERSTATICPARMS_COUNT 7
+#define SHADERSTATICPARMS_COUNT 8
 
 static const char *shaderstaticparmstrings_list[SHADERSTATICPARMS_COUNT];
 static int shaderstaticparms_count = 0;
@@ -903,6 +908,8 @@ qboolean R_CompileShader_CheckStaticParms(void)
                if (r_glsl_postprocess_uservec4_enable.integer)
                        R_COMPILESHADER_STATICPARM_ENABLE(SHADERSTATICPARM_POSTPROCESS_USERVEC4);
        }
+       if (r_glsl_offsetmapping_lod.integer && r_glsl_offsetmapping_lod_distance.integer > 0)
+               R_COMPILESHADER_STATICPARM_ENABLE(SHADERSTATICPARM_OFFSETMAPPING_USELOD);
        return memcmp(r_compileshader_staticparms, r_compileshader_staticparms_save, sizeof(r_compileshader_staticparms)) != 0;
 }
 
@@ -923,6 +930,7 @@ void R_CompileShader_AddStaticParms(unsigned int mode, unsigned int permutation)
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_POSTPROCESS_USERVEC3, "USERVEC3");
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_POSTPROCESS_USERVEC4, "USERVEC4");
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS, "USEBOTHALPHAS");
+       R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_OFFSETMAPPING_USELOD, "USEOFFSETMAPPING_LOD");
 }
 
 /// information about each possible shader permutation
@@ -1141,6 +1149,8 @@ static void R_GLSL_CompilePermutation(r_glsl_permutation_t *p, unsigned int mode
                p->loc_LightDir                   = qglGetUniformLocation(p->program, "LightDir");
                p->loc_LightPosition              = qglGetUniformLocation(p->program, "LightPosition");
                p->loc_OffsetMapping_ScaleSteps   = qglGetUniformLocation(p->program, "OffsetMapping_ScaleSteps");
+               p->loc_OffsetMapping_LodDistance  = qglGetUniformLocation(p->program, "OffsetMapping_LodDistance");
+               p->loc_OffsetMapping_Bias         = qglGetUniformLocation(p->program, "OffsetMapping_Bias");
                p->loc_PixelSize                  = qglGetUniformLocation(p->program, "PixelSize");
                p->loc_ReflectColor               = qglGetUniformLocation(p->program, "ReflectColor");
                p->loc_ReflectFactor              = qglGetUniformLocation(p->program, "ReflectFactor");
@@ -1380,7 +1390,9 @@ typedef enum D3DPSREGISTER_e
        D3DPSREGISTER_ViewToLight = 44, // float4x4
        D3DPSREGISTER_ModelToReflectCube = 48, // float4x4
        D3DPSREGISTER_NormalmapScrollBlend = 52,
-       // next at 53
+       D3DPSREGISTER_OffsetMapping_LodDistance = 53,
+       D3DPSREGISTER_OffsetMapping_Bias = 54,
+       // next at 54
 }
 D3DPSREGISTER_t;
 
@@ -2171,7 +2183,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else if (rsurfacepass == RSURFPASS_DEFERREDGEOMETRY)
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2192,7 +2204,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else if (rsurfacepass == RSURFPASS_RTLIGHT)
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2238,7 +2250,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_FULLBRIGHT)
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2291,7 +2303,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT_DIRECTIONAL)
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2354,7 +2366,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT)
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2414,7 +2426,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        }
        else
        {
-               if (r_glsl_offsetmapping.integer)
+               if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
                {
                        switch(rsurface.texture->offsetmapping)
                        {
@@ -2618,6 +2630,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                                1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer),
                                max(1, r_glsl_offsetmapping_reliefmapping_refinesteps.integer)
                        );
+               hlslPSSetParameter1f(D3DPSREGISTER_OffsetMapping_LodDistance, r_glsl_offsetmapping_lod_distance.integer);
+               hlslPSSetParameter1f(D3DPSREGISTER_OffsetMapping_Bias, rsurface.texture->offsetbias);
                hlslPSSetParameter2f(D3DPSREGISTER_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                hlslPSSetParameter2f(D3DPSREGISTER_PixelToScreenTexCoord, 1.0f/vid.width, 1.0/vid.height);
 
@@ -2778,6 +2792,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                                1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer),
                                max(1, r_glsl_offsetmapping_reliefmapping_refinesteps.integer)
                        );
+               if (r_glsl_permutation->loc_OffsetMapping_LodDistance >= 0) qglUniform1f(r_glsl_permutation->loc_OffsetMapping_LodDistance, r_glsl_offsetmapping_lod_distance.integer);
+               if (r_glsl_permutation->loc_OffsetMapping_Bias >= 0) qglUniform1f(r_glsl_permutation->loc_OffsetMapping_Bias, rsurface.texture->offsetbias);
                if (r_glsl_permutation->loc_ScreenToDepth >= 0) qglUniform2f(r_glsl_permutation->loc_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                if (r_glsl_permutation->loc_PixelToScreenTexCoord >= 0) qglUniform2f(r_glsl_permutation->loc_PixelToScreenTexCoord, 1.0f/vid.width, 1.0f/vid.height);
                if (r_glsl_permutation->loc_BounceGridMatrix >= 0) {Matrix4x4_Concat(&tempmatrix, &r_shadow_bouncegridmatrix, &rsurface.matrix);Matrix4x4_ToArrayFloatGL(&tempmatrix, m16f);qglUniformMatrix4fv(r_glsl_permutation->loc_BounceGridMatrix, 1, false, m16f);}
@@ -2923,6 +2939,8 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                                1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer),
                                max(1, r_glsl_offsetmapping_reliefmapping_refinesteps.integer)
                        );
+               DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_OffsetMapping_LodDistance, r_glsl_offsetmapping_lod_distance.integer);
+               DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_OffsetMapping_Bias, rsurface.texture->offsetbias);
                DPSOFTRAST_Uniform2f(DPSOFTRAST_UNIFORM_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                DPSOFTRAST_Uniform2f(DPSOFTRAST_UNIFORM_PixelToScreenTexCoord, 1.0f/vid.width, 1.0f/vid.height);
 
@@ -4289,6 +4307,8 @@ void GL_Main_Init(void)
        Cvar_RegisterVariable(&r_glsl_offsetmapping_reliefmapping_steps);
        Cvar_RegisterVariable(&r_glsl_offsetmapping_reliefmapping_refinesteps);
        Cvar_RegisterVariable(&r_glsl_offsetmapping_scale);
+       Cvar_RegisterVariable(&r_glsl_offsetmapping_lod);
+       Cvar_RegisterVariable(&r_glsl_offsetmapping_lod_distance);
        Cvar_RegisterVariable(&r_glsl_postprocess);
        Cvar_RegisterVariable(&r_glsl_postprocess_uservec1);
        Cvar_RegisterVariable(&r_glsl_postprocess_uservec2);