Trade: return Color4 from PhongMaterialData.

A breaking change, sorry everyone. It had to be done and there was no
other way.

doc/changelog.dox

@@ -125,6 +125,10 @@ See also:
 -   @ref Audio::Playable is now by default omnidirectional instead of having
     source in direction of negative Z axis (the direction has effect only when
     setting inner and outer cone properties of @ref Audio::Source).
+-   @ref Trade::PhongMaterialData::ambientColor(),
+    @ref Trade::PhongMaterialData::diffuseColor() "diffuseColor()" and
+    @ref Trade::PhongMaterialData::specularColor() "specularColor()" now return
+    @ref Color4 instead of @ref Color3
 
 @section changelog-2018-04 2018.04
 

src/Magnum/Trade/PhongMaterialData.cpp

@@ -70,7 +70,7 @@ PhongMaterialData& PhongMaterialData::operator=(PhongMaterialData&& other) noexc
     return *this;
 }
 
-Color3& PhongMaterialData::ambientColor() {
+Color4& PhongMaterialData::ambientColor() {
     CORRADE_ASSERT(!(_flags & Flag::AmbientTexture), "Trade::PhongMaterialData::ambientColor(): the material has ambient texture", _ambient.color);
     return _ambient.color;
 }
@@ -80,7 +80,7 @@ UnsignedInt& PhongMaterialData::ambientTexture() {
     return _ambient.texture;
 }
 
-Color3& PhongMaterialData::diffuseColor() {
+Color4& PhongMaterialData::diffuseColor() {
     CORRADE_ASSERT(!(_flags & Flag::DiffuseTexture), "Trade::PhongMaterialData::diffuseColor(): the material has diffuse texture", _diffuse.color);
     return _diffuse.color;
 }
@@ -90,7 +90,7 @@ UnsignedInt& PhongMaterialData::diffuseTexture() {
     return _diffuse.texture;
 }
 
-Color3& PhongMaterialData::specularColor() {
+Color4& PhongMaterialData::specularColor() {
     CORRADE_ASSERT(!(_flags & Flag::SpecularTexture), "Trade::PhongMaterialData::specularColor(): the material has specular texture", _specular.color);
     return _specular.color;
 }

src/Magnum/Trade/PhongMaterialData.h

@@ -96,8 +96,8 @@ class MAGNUM_TRADE_EXPORT PhongMaterialData: public AbstractMaterialData {
          * Available only if the material doesn't have @ref Flag::AmbientTexture.
          * @see @ref flags()
          */
-        Color3& ambientColor();
-        Color3 ambientColor() const; /**< @overload */
+        Color4& ambientColor();
+        Color4 ambientColor() const; /**< @overload */
 
         /**
          * @brief Ambient texture ID
@@ -114,8 +114,8 @@ class MAGNUM_TRADE_EXPORT PhongMaterialData: public AbstractMaterialData {
          * Available only if the material doesn't have @ref Flag::DiffuseTexture.
          * @see @ref flags()
          */
-        Color3& diffuseColor();
-        Color3 diffuseColor() const; /**< @overload */
+        Color4& diffuseColor();
+        Color4 diffuseColor() const; /**< @overload */
 
         /**
          * @brief Diffuse texture ID
@@ -132,8 +132,8 @@ class MAGNUM_TRADE_EXPORT PhongMaterialData: public AbstractMaterialData {
          * Available only if the material doesn't have @ref Flag::SpecularTexture.
          * @see @ref flags()
          */
-        Color3& specularColor();
-        Color3 specularColor() const; /**< @overload */
+        Color4& specularColor();
+        Color4 specularColor() const; /**< @overload */
 
         /**
          * @brief Specular texture ID
@@ -151,7 +151,7 @@ class MAGNUM_TRADE_EXPORT PhongMaterialData: public AbstractMaterialData {
         union Source {
             Source() {}
 
-            Color3 color;
+            Color4 color;
             UnsignedInt texture;
         };
 
@@ -172,7 +172,7 @@ MAGNUM_TRADE_EXPORT Debug& operator<<(Debug& debug, PhongMaterialData::Flags val
 
 /* Ugly as hell. */
 
-inline Color3 PhongMaterialData::ambientColor() const {
+inline Color4 PhongMaterialData::ambientColor() const {
     return const_cast<PhongMaterialData*>(this)->ambientColor();
 }
 
@@ -180,7 +180,7 @@ inline UnsignedInt PhongMaterialData::ambientTexture() const {
     return const_cast<PhongMaterialData*>(this)->ambientTexture();
 }
 
-inline Color3 PhongMaterialData::diffuseColor() const {
+inline Color4 PhongMaterialData::diffuseColor() const {
     return const_cast<PhongMaterialData*>(this)->diffuseColor();
 }
 
@@ -188,7 +188,7 @@ inline UnsignedInt PhongMaterialData::diffuseTexture() const {
     return const_cast<PhongMaterialData*>(this)->diffuseTexture();
 }
 
-inline Color3 PhongMaterialData::specularColor() const {
+inline Color4 PhongMaterialData::specularColor() const {
     return const_cast<PhongMaterialData*>(this)->specularColor();
 }