1 #import "Common/ShaderLib/Common.glsllib" 2 3 vec3 Texture_GetNormal(in sampler2D normalMap, in vec2 texCoord){ 4 #ifdef NORMAL_LATC 5 return Common_UnpackNormalLA( texture2D(normalMap, texCoord) ); 6 #else 7 return Common_UnpackNormal( texture2D(normalMap, texCoord).rgb ); 8 #endif 9 } 10 11 #ifdef DXT_YCOCG 12 const mat4 ycocg_mat = mat4( 1.0, -1.0, 0.0, 1.0, 13 0.0, 1.0, -0.5 * 256.0 / 255.0, 1.0, 14 -1.0, -1.0, 256.0 / 255.0, 1.0, 15 0.0, 0.0, 0.0, 0.0 ); 16 #endif 17 18 vec4 Texture_GetColor(in sampler2D colorMap, in vec2 texCoord){ 19 #ifdef DXT_YCOCG 20 vec4 color = texture2D(colorMap, texCoord); 21 // fast YCoCg decode: 22 color.z = 1.0 / ((color.z * ( 255.0 / 8.0 )) + 1.0); 23 color.xy *= color.z; 24 return color * ycocg_mat; 25 26 // slow decode: 27 //float Y = color.a; 28 //float scale = 1.0 / ((255.0 / 8.0) * color.b + 1.0); 29 //const float offset = 128.0 / 255.0; 30 //float Co = (color.r - offset) * scale; 31 //float Cg = (color.g - offset) * scale; 32 33 //float R = Y + Co - Cg; 34 //float G = Y + Cg; 35 //float B = Y - Co - Cg; 36 37 //return vec4(R, G, B, 1.0); 38 #else 39 return texture2D(colorMap, texCoord); 40 #endif 41 }
