added 6x6 pcf option for people with too much framerate

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10016 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=e3a883b6057a6bf3e4105e2f127576a5142a73cc

diff --git a/gl_rmain.c b/gl_rmain.c
index 376db83fc5fe48b589d8af8288a7b9d8bbc9d585..b1df2d9d673f214d59f81aa3d8a91426d68865a9 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -1163,6 +1163,27 @@ static const char *builtinshaderstring =
 "#        define texval(x, y) texture4(Texture_ShadowMap2D, center + vec2(x, y)*ShadowMap_TextureScale)\n"
 "#      endif\n"
 "      vec2 offset = fract(shadowmaptc.xy - 0.5), center = (shadowmaptc.xy - offset)*ShadowMap_TextureScale;\n"
+"#      if USESHADOWMAPPCF > 1\n"
+"   vec4 group1 = step(shadowmaptc.z, texval(-2.0, -2.0));\n"
+"   vec4 group2 = step(shadowmaptc.z, texval( 0.0, -2.0));\n"
+"   vec4 group3 = step(shadowmaptc.z, texval( 2.0, -2.0));\n"
+"   vec4 group4 = step(shadowmaptc.z, texval(-2.0,  0.0));\n"
+"   vec4 group5 = step(shadowmaptc.z, texval( 0.0,  0.0));\n"
+"   vec4 group6 = step(shadowmaptc.z, texval( 2.0,  0.0));\n"
+"   vec4 group7 = step(shadowmaptc.z, texval(-2.0,  2.0));\n"
+"   vec4 group8 = step(shadowmaptc.z, texval( 0.0,  2.0));\n"
+"   vec4 group9 = step(shadowmaptc.z, texval( 2.0,  2.0));\n"
+"      vec4 locols = vec4(group1.ab, group3.ab);\n"
+"      vec4 hicols = vec4(group7.rg, group9.rg);\n"
+"      locols.yz += group2.ab;\n"
+"      hicols.yz += group8.rg;\n"
+"      vec4 midcols = vec4(group1.rg, group3.rg) + vec4(group7.ab, group9.ab) +\n"
+"                              vec4(group4.rg, group6.rg) + vec4(group4.ab, group6.ab) +\n"
+"                              mix(locols, hicols, offset.y);\n"
+"      vec4 cols = group5 + vec4(group2.rg, group8.ab);\n"
+"      cols.xyz += mix(midcols.xyz, midcols.yzw, offset.x);\n"
+"      f = dot(cols, vec4(1.0/25.0));\n"
+"#      else\n"
 "      vec4 group1 = step(shadowmaptc.z, texval(-1.0, -1.0));\n"
 "      vec4 group2 = step(shadowmaptc.z, texval( 1.0, -1.0));\n"
 "      vec4 group3 = step(shadowmaptc.z, texval(-1.0,  1.0));\n"
@@ -1170,6 +1191,7 @@ static const char *builtinshaderstring =
 "      vec4 cols = vec4(group1.rg, group2.rg) + vec4(group3.ab, group4.ab) +\n"
 "                              mix(vec4(group1.ab, group2.ab), vec4(group3.rg, group4.rg), offset.y);\n"
 "      f = dot(mix(cols.xyz, cols.yzw, offset.x), vec3(1.0/9.0));\n"
+"#      endif\n"
 "#     else\n"
 "#      ifdef GL_EXT_gpu_shader4\n"
 "#        define texval(x, y) texture2DOffset(Texture_ShadowMap2D, center, ivec2(x, y)).r\n"
@@ -2300,14 +2322,36 @@ const char *builtincgshaderstring =
 "#      else\n"
 "#        define texval(x, y) texture4(Texture_ShadowMap2D, center + float2(x, y)*ShadowMap_TextureScale)\n"
 "#      endif\n"
-"    float2 offset = fract(shadowmaptc.xy - 0.5), center = (shadowmaptc.xy - offset)*ShadowMap_TextureScale;\n"
-"    float4 group1 = step(shadowmaptc.z, texval(-1.0, -1.0));\n"
-"    float4 group2 = step(shadowmaptc.z, texval( 1.0, -1.0));\n"
-"    float4 group3 = step(shadowmaptc.z, texval(-1.0,  1.0));\n"
-"    float4 group4 = step(shadowmaptc.z, texval( 1.0,  1.0));\n"
-"    float4 cols = float4(group1.rg, group2.rg) + float4(group3.ab, group4.ab) +\n"
-"                lerp(float4(group1.ab, group2.ab), float4(group3.rg, group4.rg), offset.y);\n"
-"    f = dot(lerp(cols.xyz, cols.yzw, offset.x), float3(1.0/9.0));\n"
+"      float2 offset = frac(shadowmaptc.xy - 0.5), center = (shadowmaptc.xy - offset)*ShadowMap_TextureScale;\n"
+"#      if USESHADOWMAPPCF > 1\n"
+"      float4 group1 = step(shadowmaptc.z, texval(-2.0, -2.0));\n"
+"      float4 group2 = step(shadowmaptc.z, texval( 0.0, -2.0));\n"
+"      float4 group3 = step(shadowmaptc.z, texval( 2.0, -2.0));\n"
+"      float4 group4 = step(shadowmaptc.z, texval(-2.0,  0.0));\n"
+"      float4 group5 = step(shadowmaptc.z, texval( 0.0,  0.0));\n"
+"      float4 group6 = step(shadowmaptc.z, texval( 2.0,  0.0));\n"
+"      float4 group7 = step(shadowmaptc.z, texval(-2.0,  2.0));\n"
+"      float4 group8 = step(shadowmaptc.z, texval( 0.0,  2.0));\n"
+"      float4 group9 = step(shadowmaptc.z, texval( 2.0,  2.0));\n"
+"      float4 locols = float4(group1.ab, group3.ab);\n"
+"      float4 hicols = float4(group7.rg, group9.rg);\n"
+"      locols.yz += group2.ab;\n"
+"      hicols.yz += group8.rg;\n"
+"      float4 midcols = float4(group1.rg, group3.rg) + float4(group7.ab, group9.ab) +\n"
+"                  float4(group4.rg, group6.rg) + float4(group4.ab, group6.ab) +\n"
+"                  lerp(locols, hicols, offset.y);\n"
+"      float4 cols = group5 + float4(group2.rg, group8.ab);\n"
+"      cols.xyz += lerp(midcols.xyz, midcols.yzw, offset.x);\n"
+"      f = dot(cols, float4(1.0/25.0));\n"
+"#      else\n"
+"      float4 group1 = step(shadowmaptc.z, texval(-1.0, -1.0));\n"
+"      float4 group2 = step(shadowmaptc.z, texval( 1.0, -1.0));\n"
+"      float4 group3 = step(shadowmaptc.z, texval(-1.0,  1.0));\n"
+"      float4 group4 = step(shadowmaptc.z, texval( 1.0,  1.0));\n"
+"      float4 cols = float4(group1.rg, group2.rg) + float4(group3.ab, group4.ab) +\n"
+"                              lerp(float4(group1.ab, group2.ab), float4(group3.rg, group4.rg), offset.y);\n"
+"      f = dot(lerp(cols.xyz, cols.yzw, offset.x), float3(1.0/9.0));\n"
+"#      endif\n"
 "#     else\n"
 "#        define texval(x, y) texDepth2D(Texture_ShadowMap2D, center + float2(x, y)*ShadowMap_TextureScale)  \n"
 "#      if USESHADOWMAPPCF > 1\n"