[Feat] (MG_State/Program): GetActiveAttrib

MobileGL/MG_Impl/GLImpl/Program/GL_Program.cpp

@@ -163,7 +163,29 @@ namespace MobileGL {
 
         void GetActiveAttrib_State(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size,
                                    GLenum* type, GLchar* name) {
-            THROW_UNIMPL_EXCEPTION;
+            if (bufSize < 0) {
+                MG_State::pGLContext->RecordError(
+                        ErrorCode::InvalidValue,
+                        MakeShared<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
+                                                     "`bufSize` is less than 0."));
+                return;
+            }
+            auto programObject = TryToGetProgramObject(program);
+            if (!programObject)
+                return;
+            auto attribCount = programObject->GetActiveAttributesCount();
+            if (index >= attribCount) {
+                MG_State::pGLContext->RecordError(
+                        ErrorCode::InvalidValue,
+                        MakeShared<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
+                                "`index` is greater than or equal to the number of active attribute variables in `program`."));
+                return;
+            }
+            if (type != nullptr)
+                *type = programObject->GetAttribType(index);
+            if (bufSize == 0) return;
+            auto& attribName = programObject->GetAttribName(index);
+            CopyStr(bufSize, length, name, attribName.c_str(), attribName.length());
         }
 
         void GetActiveUniform_State(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size,

MobileGL/MG_State/GLState/ProgramState/ProgramObject.cpp

@@ -93,6 +93,7 @@ namespace MobileGL {
                 // attributes (pipe in)
                 int inCount = m_program->getNumPipeInputs();
                 m_attribs.resize(inCount);
+                m_attribTypes.resize(inCount);
 
                 // Get locations parsed in program
                 for (int i = 0; i < inCount; i++) {
@@ -100,6 +101,7 @@ namespace MobileGL {
                     auto location = inVar.layoutLocation();
                     m_attribInNameMaxLength = std::max(m_attribInNameMaxLength, (Int)inVar.name.length());
                     m_attribs[location] = inVar.name;
+                    m_attribTypes[location] = inVar.glDefineType;
                 }
                 // Implement glBindAttribLocation semantics
                 for (auto& [name, location]: m_explicitAttribLocations) {
@@ -109,6 +111,7 @@ namespace MobileGL {
                         if (it == m_attribs.end())
                             continue;
                         std::swap(m_attribs[location], m_attribs[std::distance(m_attribs.begin(), it)]);
+                        std::swap(m_attribTypes[location], m_attribTypes[std::distance(m_attribs.begin(), it)]);
                     }
                 }
 
@@ -171,6 +174,9 @@ namespace MobileGL {
                 printf("decompiled src: \n%s", src.c_str());
             }
 
+            void ProgramObject::WaitUntilGenerationCompleted() {
+            }
+
             void ProgramObject::SetExplicitAttribLocation(Uint index, const char *name) {
                 m_explicitAttribLocations[name] = index;
             }

MobileGL/MG_State/GLState/ProgramState/ProgramObject.h

@@ -37,6 +37,12 @@ namespace MobileGL {
                     const auto it = std::find(m_attribs.begin(), m_attribs.end(), name);
                     return (it == m_attribs.end()) ? -1 : std::distance(m_attribs.begin(), it);
                 }
+                GLenum GetAttribType(Uint index) const {
+                    return m_attribTypes[index];
+                }
+                const String& GetAttribName(Uint index) const {
+                    return m_attribs[index];
+                }
 
                 Bool GetDeleteStatus() const { return m_deleteStatus; }
                 Bool GetLinkStatus() const { return m_linkStatus; }
@@ -49,6 +55,7 @@ namespace MobileGL {
             private:
                 void DoReflection();
                 void GenerateBinary();
+                void WaitUntilGenerationCompleted();
                 // void PreLink();
                 // void PostLink();
 
@@ -62,6 +69,7 @@ namespace MobileGL {
                 // Attributes
                 UnorderedMap<String, Uint> m_explicitAttribLocations;
                 Vector<String> m_attribs;
+                Vector<GLenum> m_attribTypes;
 
                 // Uniforms
                 // MG_Util::ShaderTranspiler::SpvcMetadata m_metadata;