fix: color space correction (#566)

* fix: color space correction

packages/core/src/shader/ShaderUniform.ts

@@ -120,7 +120,7 @@ export class ShaderUniform {
             Color.gammaToLinearSpace((<Color>value).r),
             Color.gammaToLinearSpace((<Color>value).g),
             Color.gammaToLinearSpace((<Color>value).b),
-            Color.gammaToLinearSpace((<Color>value).a)
+            (<Color>value).a
           );
         } else {
           this._gl.uniform4f(

packages/core/src/shaderlib/begin_mobile_frag.glsl

@@ -6,14 +6,20 @@
 
 
     #ifdef O3_EMISSIVE_TEXTURE
-
-        emission *= texture2D(u_emissiveTexture, v_uv);
+        vec4 emissiveTextureColor = texture2D(u_emissiveTexture, v_uv);
+        #ifndef OASIS_COLORSPACE_GAMMA
+            emissiveTextureColor = gammaToLinear(emissiveTextureColor);
+        #endif
+        emission *= emissiveTextureColor;
 
     #endif
 
     #ifdef O3_DIFFUSE_TEXTURE
-
-        diffuse *= texture2D(u_diffuseTexture, v_uv);
+        vec4 diffuseTextureColor = texture2D(u_diffuseTexture, v_uv);
+        #ifndef OASIS_COLORSPACE_GAMMA
+            diffuseTextureColor = gammaToLinear(diffuseTextureColor);
+        #endif
+        diffuse *= diffuseTextureColor;
 
     #endif
 
@@ -24,8 +30,11 @@
     #endif
 
     #ifdef O3_SPECULAR_TEXTURE
-
-        specular *= texture2D(u_specularTexture, v_uv);
+        vec4 specularTextureColor = texture2D(u_specularTexture, v_uv);
+        #ifndef OASIS_COLORSPACE_GAMMA
+            specularTextureColor = gammaToLinear(specularTextureColor);
+        #endif
+        specular *= specularTextureColor;
 
     #endif
 

packages/core/src/shaderlib/extra/blinn-phong.fs.glsl

@@ -12,7 +12,6 @@
 #include <fog_share>
 #include <normal_get>
 
-
 void main() {
 
     #include <begin_mobile_frag>
@@ -22,6 +21,9 @@ void main() {
     gl_FragColor = emission + ambient + diffuse + specular;
     gl_FragColor.a = diffuse.a;
 
+    #ifndef OASIS_COLORSPACE_GAMMA
+        gl_FragColor = linearToGamma(gl_FragColor);
+    #endif
     #include <fog_frag>
 
 }

packages/core/src/shaderlib/extra/unlit.fs.glsl

@@ -1,3 +1,4 @@
+#include <common>
 #include <uv_share>
 #include <fog_share>
 
@@ -12,7 +13,11 @@ void main() {
      vec4 baseColor = u_baseColor;
 
     #ifdef O3_BASE_TEXTURE
-        baseColor *= texture2D(u_baseTexture, v_uv);
+        vec4 textureColor = texture2D(u_baseTexture, v_uv);
+        #ifndef OASIS_COLORSPACE_GAMMA
+            textureColor = gammaToLinear(textureColor);
+        #endif
+        baseColor *= textureColor;
     #endif
 
     #ifdef ALPHA_CUTOFF
@@ -21,6 +26,11 @@ void main() {
         }
     #endif
 
+
+    #ifndef OASIS_COLORSPACE_GAMMA
+        baseColor = linearToGamma(baseColor);
+    #endif
+
     gl_FragColor = baseColor;
 
     #include <fog_frag>

packages/core/src/shaderlib/pbr/ibl_frag_define.glsl

@@ -62,7 +62,7 @@ vec3 getLightProbeRadiance(GeometricContext geometry, float roughness, int maxMI
 
         envMapColor.rgb = RGBMToLinear(envMapColor, 5.0).rgb;
         #ifdef OASIS_COLORSPACE_GAMMA
-            envMapColor = linearTogamma(envMapColor);
+            envMapColor = linearToGamma(envMapColor);
         #endif
         return envMapColor.rgb * specularIntensity;
 

packages/core/src/shaderlib/pbr/pbr_frag.glsl

@@ -10,7 +10,7 @@ addTotalDirectRadiance(geometry, material, reflectedLight);
 #ifdef O3_USE_SH
     vec3 irradiance = getLightProbeIrradiance(u_env_sh, geometry.normal);
     #ifdef OASIS_COLORSPACE_GAMMA
-        irradiance = linearTogamma(irradiance);
+        irradiance = linearToGamma(vec4(irradiance, 1.0)).rgb;
     #endif
     irradiance *= u_envMapLight.diffuseIntensity;
 #else
@@ -50,8 +50,8 @@ vec3 totalRadiance =    reflectedLight.directDiffuse +
                         reflectedLight.indirectSpecular + 
                         emissiveRadiance;
 
-vec4 tagetColor =vec4(totalRadiance, u_baseColor.a);
+vec4 targetColor =vec4(totalRadiance, u_baseColor.a);
 #ifndef OASIS_COLORSPACE_GAMMA
-    tagetColor = linearToGamma (tagetColor);
+    targetColor = linearToGamma(targetColor);
 #endif
-gl_FragColor = tagetColor;
+gl_FragColor = targetColor;