+"# ifdef USESHADOWMAPPCF\n"
+"# if defined(GL_ARB_texture_gather) || defined(GL_AMD_texture_texture4)\n"
+"# ifdef GL_ARB_texture_gather\n"
+"# define texval(x, y) textureGatherOffset(Texture_ShadowMap2D, center, ivec(x, y))\n"
+"# else\n"
+"# define texval(x, y) texture4(Texture_ShadowMap2D, center + vec2(x,y)*ShadowMap_TextureScale)\n"
+"# endif\n"
+" vec2 center = shadowmaptc.xy - 0.5, offset = fract(center);\n"
+" center *= ShadowMap_TextureScale;\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"
+" vec4 group4 = step(shadowmaptc.z, texval( 1.0, 1.0));\n"
+" 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"
+"# else\n"
+"# ifdef GL_EXT_gpu_shader4\n"
+"# define texval(x, y) texture2DOffset(Texture_ShadowMap2D, center, ivec2(x, y)).r\n"
+"# else\n"
+"# define texval(x, y) texture2D(Texture_ShadowMap2D, center + vec2(x, y)*ShadowMap_TextureScale).r \n"
+"# endif\n"
+"# if USESHADOWMAPPCF > 1\n"
+" vec2 center = shadowmaptc.xy - 0.5, offset = fract(center);\n"
+" center *= ShadowMap_TextureScale;\n"
+" vec4 row1 = step(shadowmaptc.z, vec4(texval(-1.0, -1.0), texval( 0.0, -1.0), texval( 1.0, -1.0), texval( 2.0, -1.0)));\n"
+" vec4 row2 = step(shadowmaptc.z, vec4(texval(-1.0, 0.0), texval( 0.0, 0.0), texval( 1.0, 0.0), texval( 2.0, 0.0)));\n"
+" vec4 row3 = step(shadowmaptc.z, vec4(texval(-1.0, 1.0), texval( 0.0, 1.0), texval( 1.0, 1.0), texval( 2.0, 1.0)));\n"
+" vec4 row4 = step(shadowmaptc.z, vec4(texval(-1.0, 2.0), texval( 0.0, 2.0), texval( 1.0, 2.0), texval( 2.0, 2.0)));\n"
+" vec4 cols = row2 + row3 + mix(row1, row4, offset.y);\n"
+" f = dot(mix(cols.xyz, cols.yzw, offset.x), vec3(1.0/9.0));\n"
+"# else\n"
+" vec2 center = shadowmaptc.xy*ShadowMap_TextureScale, offset = fract(shadowmaptc.xy);\n"
+" vec3 row1 = step(shadowmaptc.z, vec3(texval(-1.0, -1.0), texval( 0.0, -1.0), texval( 1.0, -1.0)));\n"
+" vec3 row2 = step(shadowmaptc.z, vec3(texval(-1.0, 0.0), texval( 0.0, 0.0), texval( 1.0, 0.0)));\n"
+" vec3 row3 = step(shadowmaptc.z, vec3(texval(-1.0, 1.0), texval( 0.0, 1.0), texval( 1.0, 1.0)));\n"
+" vec3 cols = row2 + mix(row1, row3, offset.y);\n"
+" f = dot(mix(cols.xy, cols.yz, offset.x), vec2(0.25));\n"
+"# endif\n"
+"# endif\n"
+"# else\n"
+" f = step(shadowmaptc.z, texture2D(Texture_ShadowMap2D, shadowmaptc.xy*ShadowMap_TextureScale).r);\n"
+"# endif\n"