[Feat] (MG_Impl/Texture, MG_State/TextureState, MG_Impl/Framebuffer, MG_Test/Texture): implement multisample frontend state

MobileGL/MG_State/GLState/TextureState/TextureObject.cpp

@@ -139,6 +139,22 @@ namespace MobileGL {
                 return m_textureParamsVersion;
             }
 
+            Int TextureObjectBase::GetSamples() const {
+                return m_samples;
+            }
+
+            void TextureObjectBase::SetSamples(Int samples) {
+                m_samples = samples;
+            }
+
+            Bool TextureObjectBase::HasFixedSampleLocations() const {
+                return m_fixedSampleLocations;
+            }
+
+            void TextureObjectBase::SetFixedSampleLocations(Bool fixedSampleLocations) {
+                m_fixedSampleLocations = fixedSampleLocations;
+            }
+
             Uint TextureObjectWithOneMipmap::GetMipmapLevelCount() const {
                 return m_textureStorage.GetLevelCount();
             }

MobileGL/MG_State/GLState/TextureState/TextureObject.h

@@ -40,6 +40,10 @@ namespace MobileGL::MG_State::GLState {
         virtual void SetBaseLevel(Uint baseLevel) = 0;
         virtual void SetMaxLevel(Uint maxLevel) = 0;
         virtual Uint16 GetTextureParamsVersion() const = 0;
+        virtual Int GetSamples() const = 0;
+        virtual void SetSamples(Int samples) = 0;
+        virtual Bool HasFixedSampleLocations() const = 0;
+        virtual void SetFixedSampleLocations(Bool fixedSampleLocations) = 0;
 
     protected:
         virtual Uint GetIndexOfTextureUploadTarget(TextureUploadTarget target) const = 0;
@@ -67,6 +71,10 @@ namespace MobileGL::MG_State::GLState {
         void SetBaseLevel(Uint baseLevel) override;
         void SetMaxLevel(Uint maxLevel) override;
         Uint16 GetTextureParamsVersion() const override;
+        Int GetSamples() const override;
+        void SetSamples(Int samples) override;
+        Bool HasFixedSampleLocations() const override;
+        void SetFixedSampleLocations(Bool fixedSampleLocations) override;
 
     protected:
         const Uint m_externalIndex;
@@ -78,6 +86,8 @@ namespace MobileGL::MG_State::GLState {
                                                      TextureSwizzleParam::Blue, TextureSwizzleParam::Alpha};
         UintVec2 m_levelRange = {0, 1000};
         Uint16 m_textureParamsVersion = 0;
+        Int m_samples = 0;
+        Bool m_fixedSampleLocations = true;
     };
 
     class TextureObjectMipmap : public TextureObjectBase {

MobileGL/MG_State/GLState/TextureState/TextureObjectStubs.h

@@ -15,12 +15,11 @@ namespace MobileGL {
         namespace GLState {
             /* These texture types are not yet implemented:
              * TextureRectangle,
-             * Texture2DMultisample,
              * TextureBuffer,
              * Texture1DArray,
              * Texture2DArray,
              * TextureCubeMapArray,
-             * Texture2DMultisampleArray
+             * Texture2DMultisampleArray layered attachment behavior
              */
 #define STUB_TEXTURE_OBJECT_CLASS_DEFINITION(className, texTarget, uploadTargets)                                      \
     class className : public TextureObjectWithOneMipmap {                                                              \
@@ -58,4 +57,4 @@ namespace MobileGL {
 
         } // namespace GLState
     } // namespace MG_State
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_State/GLState/TextureState/TextureState.cpp

@@ -57,7 +57,7 @@ namespace MobileGL::MG_State::GLState {
             textureObject = MakeShared<TextureObjectBuffer>(index);
             break;
 
-            // These texture types are stubbed:
+            // These texture types are still stubbed:
         case TextureTarget::TextureRectangle:
             textureObject = MakeShared<TextureObjectRectangle>(index);
             break;