[Feat] (MG_State/RenderState, MG_Backend/DirectVulkan): make Distant

Horizon work
- Implement BlendEquation/CullFaceMode/PointSize/PolygonMode
- Implement GetFramebufferAttachmentParameter*
- Downgrade some color attachment resolve failure
- Downgrade some overly-strict shader stage linkage check (don't check
  on unused input var)

MobileGL/MG_Util/Converters/GLToMG/RenderStateEnumConverter.cpp

@@ -45,6 +45,23 @@ namespace MobileGL {
             }
         }
 
+        BlendEquation ConvertGLEnumToBlendEquation(GLenum v) {
+            switch (v) {
+            case GL_FUNC_ADD:
+                return BlendEquation::Add;
+            case GL_FUNC_SUBTRACT:
+                return BlendEquation::Subtract;
+            case GL_FUNC_REVERSE_SUBTRACT:
+                return BlendEquation::ReverseSubtract;
+            case GL_MIN:
+                return BlendEquation::Min;
+            case GL_MAX:
+                return BlendEquation::Max;
+            default:
+                return BlendEquation::Unknown;
+            }
+        }
+
         DepthTestFunc ConvertGLEnumToDepthTestFunc(GLenum v) {
             switch (v) {
             case GL_NEVER:
@@ -197,4 +214,4 @@ namespace MobileGL {
             }
         }
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/GLToMG/RenderStateEnumConverter.h

@@ -13,9 +13,10 @@
 namespace MobileGL {
     namespace MG_Util {
         BlendFactor ConvertGLEnumToBlendFactor(GLenum value);
+        BlendEquation ConvertGLEnumToBlendEquation(GLenum value);
         DepthTestFunc ConvertGLEnumToDepthTestFunc(GLenum value);
         PixelStoreParam ConvertGLEnumToPixelStoreParam(GLenum value);
         CullFaceMode ConvertGLEnumToCullFaceMode(GLenum value);
         CapabilityInput ConvertGLEnumToCapabilityInput(GLenum value);
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/MGToGL/RenderStateEnumConverter.cpp

@@ -46,6 +46,23 @@ namespace MobileGL {
             }
         }
 
+        GLenum ConvertBlendEquationToGLEnum(BlendEquation v) {
+            switch (v) {
+            case BlendEquation::Add:
+                return GL_FUNC_ADD;
+            case BlendEquation::Subtract:
+                return GL_FUNC_SUBTRACT;
+            case BlendEquation::ReverseSubtract:
+                return GL_FUNC_REVERSE_SUBTRACT;
+            case BlendEquation::Min:
+                return GL_MIN;
+            case BlendEquation::Max:
+                return GL_MAX;
+            default:
+                return GL_UNKNOWN_MGL;
+            }
+        }
+
         GLenum ConvertDepthTestFuncToGLEnum(DepthTestFunc v) {
             switch (v) {
             case DepthTestFunc::Never:
@@ -198,4 +215,4 @@ namespace MobileGL {
             }
         }
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/MGToGL/RenderStateEnumConverter.h

@@ -13,9 +13,10 @@
 namespace MobileGL {
     namespace MG_Util {
         GLenum ConvertBlendFactorToGLEnum(BlendFactor value);
+        GLenum ConvertBlendEquationToGLEnum(BlendEquation value);
         GLenum ConvertDepthTestFuncToGLEnum(DepthTestFunc value);
         GLenum ConvertPixelStoreParamToGLEnum(PixelStoreParam value);
         GLenum ConvertCullFaceModeToGLEnum(CullFaceMode value);
         GLenum ConvertCapabilityInputToGLEnum(CapabilityInput value);
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/MGToVk/RenderStateEnumConverter.cpp

@@ -103,5 +103,22 @@ namespace MobileGL {
                 return VK_BLEND_FACTOR_ONE;
             }
         }
+
+        VkBlendOp ConvertBlendEquationToVkEnum(BlendEquation v) {
+            switch (v) {
+            case BlendEquation::Add:
+                return VK_BLEND_OP_ADD;
+            case BlendEquation::Subtract:
+                return VK_BLEND_OP_SUBTRACT;
+            case BlendEquation::ReverseSubtract:
+                return VK_BLEND_OP_REVERSE_SUBTRACT;
+            case BlendEquation::Min:
+                return VK_BLEND_OP_MIN;
+            case BlendEquation::Max:
+                return VK_BLEND_OP_MAX;
+            default:
+                return VK_BLEND_OP_ADD;
+            }
+        }
     } // namespace MG_Util
 } // namespace MobileGL

MobileGL/MG_Util/Converters/MGToVk/RenderStateEnumConverter.h

@@ -16,5 +16,6 @@ namespace MobileGL {
         VkCullModeFlags ConvertCullFaceModeToVkEnum(CullFaceMode value, Bool invertClockwise = false);
         VkCompareOp ConvertDepthTestFuncToVkEnum(DepthTestFunc value);
         VkBlendFactor ConvertBlendFactorToVkEnum(BlendFactor value);
+        VkBlendOp ConvertBlendEquationToVkEnum(BlendEquation value);
     } // namespace MG_Util
 } // namespace MobileGL