[Fix] (MG_Backend/DirectVulkan): support Voxy rendering

Implemented:

- Advertise Voxy-required DirectVulkan extensions without raising the reported OpenGL version.

- Add DirectVulkan compute, indirect draw count, DSA, readback, and buffer state paths needed by Voxy.

Fixed:

- Enable Vulkan shaderInt64 and drawIndirectFirstInstance so Voxy baseInstance-driven LOD draws address the correct section data.

- Fix DirectVulkan synchronization, framebuffer, texture readback, and shader interface handling used by Voxy and Minecraft screenshots.

Tests:

- Add MG_Test coverage for DirectVulkan extension advertising, DSA buffer/texture/framebuffer/vertex-array behavior, persistent mapped readback, and shader/program paths.

MobileGL/MG_Util/Converters/GLToMG/BufferEnumConverter.cpp

@@ -38,6 +38,8 @@ namespace MobileGL {
                 return BufferTarget::DispatchIndirect;
             case GL_DRAW_INDIRECT_BUFFER:
                 return BufferTarget::DrawIndirect;
+            case GL_PARAMETER_BUFFER_ARB:
+                return BufferTarget::Parameter;
             case GL_SHADER_STORAGE_BUFFER:
                 return BufferTarget::ShaderStorage;
             case GL_UNKNOWN_MGL:
@@ -84,4 +86,4 @@ namespace MobileGL {
             return result;
         }
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/GLToMG/RenderStateEnumConverter.cpp

@@ -148,6 +148,17 @@ namespace MobileGL {
             }
         }
 
+        ProvokingVertexMode ConvertGLEnumToProvokingVertexMode(GLenum v) {
+            switch (v) {
+            case GL_FIRST_VERTEX_CONVENTION:
+                return ProvokingVertexMode::FirstVertex;
+            case GL_LAST_VERTEX_CONVENTION:
+                return ProvokingVertexMode::LastVertex;
+            default:
+                return ProvokingVertexMode::Unknown;
+            }
+        }
+
         CapabilityInput ConvertGLEnumToCapabilityInput(GLenum v) {
             switch (v) {
             case GL_BLEND:

MobileGL/MG_Util/Converters/GLToMG/RenderStateEnumConverter.h

@@ -18,6 +18,7 @@ namespace MobileGL {
         PixelStoreParam ConvertGLEnumToPixelStoreParam(GLenum value);
         CullFaceMode ConvertGLEnumToCullFaceMode(GLenum value);
         FrontFaceMode ConvertGLEnumToFrontFaceMode(GLenum value);
+        ProvokingVertexMode ConvertGLEnumToProvokingVertexMode(GLenum value);
         CapabilityInput ConvertGLEnumToCapabilityInput(GLenum value);
     } // namespace MG_Util
 } // namespace MobileGL

MobileGL/MG_Util/Converters/MGToGL/BufferEnumConverter.cpp

@@ -38,6 +38,8 @@ namespace MobileGL {
                 return GL_DISPATCH_INDIRECT_BUFFER;
             case BufferTarget::DrawIndirect:
                 return GL_DRAW_INDIRECT_BUFFER;
+            case BufferTarget::Parameter:
+                return GL_PARAMETER_BUFFER_ARB;
             case BufferTarget::ShaderStorage:
                 return GL_SHADER_STORAGE_BUFFER;
             case BufferTarget::Unknown:
@@ -84,4 +86,4 @@ namespace MobileGL {
             return result;
         }
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/MGToGL/RenderStateEnumConverter.cpp

@@ -149,6 +149,17 @@ namespace MobileGL {
             }
         }
 
+        GLenum ConvertProvokingVertexModeToGLEnum(ProvokingVertexMode v) {
+            switch (v) {
+            case ProvokingVertexMode::FirstVertex:
+                return GL_FIRST_VERTEX_CONVENTION;
+            case ProvokingVertexMode::LastVertex:
+                return GL_LAST_VERTEX_CONVENTION;
+            default:
+                return GL_UNKNOWN_MGL;
+            }
+        }
+
         GLenum ConvertCapabilityInputToGLEnum(CapabilityInput v) {
             switch (v) {
             case CapabilityInput::Blend:

MobileGL/MG_Util/Converters/MGToGL/RenderStateEnumConverter.h

@@ -18,6 +18,7 @@ namespace MobileGL {
         GLenum ConvertPixelStoreParamToGLEnum(PixelStoreParam value);
         GLenum ConvertCullFaceModeToGLEnum(CullFaceMode value);
         GLenum ConvertFrontFaceModeToGLEnum(FrontFaceMode value);
+        GLenum ConvertProvokingVertexModeToGLEnum(ProvokingVertexMode value);
         GLenum ConvertCapabilityInputToGLEnum(CapabilityInput value);
     } // namespace MG_Util
 } // namespace MobileGL

MobileGL/MG_Util/Converters/MGToStr/BufferEnumConverter.cpp

@@ -38,6 +38,8 @@ namespace MobileGL {
                 return "DispatchIndirect";
             case BufferTarget::DrawIndirect:
                 return "DrawIndirect";
+            case BufferTarget::Parameter:
+                return "Parameter";
             case BufferTarget::ShaderStorage:
                 return "ShaderStorage";
             case BufferTarget::Unknown:
@@ -87,4 +89,4 @@ namespace MobileGL {
             return result.empty() ? "[]" : result;
         }
     } // namespace MG_Util
-} // namespace MobileGL
+} // namespace MobileGL

MobileGL/MG_Util/Converters/MGToStr/RenderStateEnumConverter.cpp

@@ -131,6 +131,17 @@ namespace MobileGL {
             }
         }
 
+        String ConvertProvokingVertexModeToString(ProvokingVertexMode v) {
+            switch (v) {
+            case ProvokingVertexMode::FirstVertex:
+                return "FirstVertex";
+            case ProvokingVertexMode::LastVertex:
+                return "LastVertex";
+            default:
+                return "Unknown";
+            }
+        }
+
         String ConvertCapabilityInputToString(CapabilityInput v) {
             switch (v) {
             case CapabilityInput::Blend:

MobileGL/MG_Util/Converters/MGToStr/RenderStateEnumConverter.h

@@ -17,6 +17,7 @@ namespace MobileGL {
         String ConvertPixelStoreParamToString(PixelStoreParam value);
         String ConvertCullFaceModeToString(CullFaceMode value);
         String ConvertFrontFaceModeToString(FrontFaceMode value);
+        String ConvertProvokingVertexModeToString(ProvokingVertexMode value);
         String ConvertCapabilityInputToString(CapabilityInput value);
     } // namespace MG_Util
 } // namespace MobileGL