[Feat|Refactor] (MG_Backend|MG_Impl): Implement BackendObject, replacing previous methods.

2026-09-08 12:18:30 +09:00 · 2026-02-18 10:36:56 +08:00
parent fe89dc82dc
commit 8413874e82
52 changed files with 5546 additions and 5863 deletions
@@ -0,0 +1,136 @@
+// MobileGL - MobileGL/MG_Backend/DirectGLES/BackendObject_DirectGLES.cpp
+// Copyright (c) 2025-2026 MobileGL-Dev
+// Licensed under the GNU Lesser General Public License v3.0:
+//   https://www.gnu.org/licenses/gpl-3.0.txt
+//   https://www.gnu.org/licenses/lgpl-3.0.txt
+// SPDX-License-Identifier: LGPL-3.0-only
+// End of Source File Header
+
+#include "BackendObject_DirectGLES.h"
+#include "MG_Backend/BackendObject.h"
+#include <MG_Backend/DirectGLES/DirectGLES.h>
+#include <MG_Util/BackendLoaders/OpenGL/Loader.h>
+#include <format>
+
+namespace MobileGL::MG_Backend::DirectGLES {
+    BackendObject_DirectGLES::~BackendObject_DirectGLES() {
+        DestroyEGLContext();
+    }
+
+    void BackendObject_DirectGLES::InitWindowSurface() {
+        // Only use EGL for now
+        auto nativeWindow = reinterpret_cast<NativeWindowType>(m_windowHandle.Handle);
+        if (!DirectGLES::InitWindowSurface(nativeWindow)) {
+            MGLOG_E("Failed to initialize window surface for DirectGLES backend");
+        }
+    }
+
+    void BackendObject_DirectGLES::Initialize() {
+        if (!MG_Util::BackendLoader::AcquireEGLFunctions(m_EGLFunctions)) {
+            MGLOG_E("Failed to acquire EGL functions for DirectGLES backend");
+            return;
+        }
+        if (!MG_Util::BackendLoader::AcquireGLESFunctions(m_GLESFunctions, m_EGLFunctions.eglGetProcAddress)) {
+            MGLOG_E("Failed to acquire GLES functions for DirectGLES backend");
+            return;
+        }
+        m_initialized = true;
+
+        DirectGLES::SetEGLFuncsTable(m_EGLFunctions);
+        DirectGLES::SetGLESFuncsTable(m_GLESFunctions);
+
+        if (!MG_Util::BackendLoader::FillInGLESCapabilities(m_GLESCapabilities, m_GLESFunctions, m_EGLFunctions)) {
+            MGLOG_E("Failed to fill in GLES capabilities for DirectGLES backend");
+            return;
+        }
+        DirectGLES::SetGLESCapabilities(m_GLESCapabilities);
+        UpdateDynamicBackendParameters();
+    }
+
+    const RendererInfo& BackendObject_DirectGLES::GetRendererInfo() const {
+        static RendererInfo RendererInfo = {
+            .RendererName = "Espryt",            // Renderer Name
+            .BackendName = "Direct (OpenGL ES)", // Backend Name
+            .ExtraVendor = Nullopt,              // Extra vendor
+            .RendererGLInfo =
+                {
+                    .TargetGLVersion = {3, 3, 0},                      // Target OpenGL Version
+                    .TargetGLSLVersion = {4, 6, 0},                    // Target Shading Language Version
+                    .Extensions = {V_OpenGL30, V_OpenGL31, V_OpenGL32, // OpenGL Extensions
+                                   V_OpenGL33, E_GL_ARB_draw_buffers_blend},
+                    .IsCompatibilityProfile = false // Is Compatibility Profile
+                },
+            .StaticBackendCapability = {.AllowVSOnlyPrograms = false} // Backend Capability
+        };
+        return RendererInfo;
+    }
+
+    String BackendObject_DirectGLES::GetBackendAPIVersionString() const {
+        if (!m_initialized) {
+            return "<uninitialized DirectGLES backend>";
+        }
+        // Format:
+        // <OpenGL ES Renderer>, OpenGL ES <OpenGL ES Version>
+        String versionString = std::format("{}, OpenGL ES {}.{}", m_GLESCapabilities.GLESRendererString,
+                                           m_GLESCapabilities.GLESVersion.Major, m_GLESCapabilities.GLESVersion.Minor);
+        return versionString;
+    }
+
+    BackendType BackendObject_DirectGLES::GetBackendType() const {
+        return BackendType::DirectGLES;
+    }
+
+    const GlobalBackendFunctionsTable& BackendObject_DirectGLES::GetBackendFunctions() const {
+        static GlobalBackendFunctionsTable funcsTable;
+        static Bool funcsTableInitialized = false;
+        if (!funcsTableInitialized) {
+            funcsTable.Present = DirectGLES::Present;
+            funcsTable.GL.DrawArrays = DrawArrays;
+            funcsTable.GL.DrawElements = DrawElements;
+            funcsTable.GL.DrawElementsBaseVertex = DrawElementsBaseVertex;
+            funcsTable.GL.MultiDrawElements = MultiDrawElements;
+            funcsTable.GL.MultiDrawElementsBaseVertex = MultiDrawElementsBaseVertex;
+            funcsTable.GL.MultiDrawElementsIndirect = MultiDrawElementsIndirect;
+            funcsTable.GL.MultiDrawArraysIndirect = MultiDrawArraysIndirect;
+            funcsTable.GL.DrawRangeElementsBaseVertex = DrawRangeElementsBaseVertex;
+            funcsTable.GL.DrawRangeElements = DrawRangeElements;
+            funcsTable.GL.DrawElementsInstancedBaseVertexBaseInstance = DrawElementsInstancedBaseVertexBaseInstance;
+            funcsTable.GL.DrawElementsInstancedBaseVertex = DrawElementsInstancedBaseVertex;
+            funcsTable.GL.DrawElementsInstancedBaseInstance = DrawElementsInstancedBaseInstance;
+            funcsTable.GL.DrawElementsInstanced = DrawElementsInstanced;
+            funcsTable.GL.DrawArraysInstancedBaseInstance = DrawArraysInstancedBaseInstance;
+            funcsTable.GL.DrawArraysInstanced = DrawArraysInstanced;
+            funcsTable.GL.DrawElementsIndirect = DrawElementsIndirect;
+            funcsTable.GL.DrawArraysIndirect = DrawArraysIndirect;
+            funcsTable.GL.Clear = Clear;
+            funcsTable.GL.ClearBufferfi = ClearBufferfi;
+            funcsTable.GL.ClearBufferfv = ClearBufferfv;
+            funcsTable.GL.ClearBufferuiv = ClearBufferuiv;
+            funcsTable.GL.ClearBufferiv = ClearBufferiv;
+            funcsTable.GL.BlitFramebuffer = BlitFramebuffer;
+            funcsTable.GL.CopyTexImage2D = CopyTexImage2D;
+            funcsTable.GL.CopyTexSubImage2D = CopyTexSubImage2D;
+            funcsTable.GL.GenerateMipmap = GenerateMipmap;
+            funcsTable.GL.ReadPixels = ReadPixels;
+            funcsTable.GL.GetTexImage = GetTexImage;
+            funcsTableInitialized = true;
+        }
+        return funcsTable;
+    }
+
+    const DynamicBackendParameters& BackendObject_DirectGLES::GetDynamicParameters() const {
+        return m_dynamicParameters;
+    }
+
+    void BackendObject_DirectGLES::UpdateDynamicBackendParameters() {
+        m_dynamicParameters.UniformBufferOffsetAlignment = m_GLESCapabilities.UniformBufferOffsetAlignment;
+    }
+
+    const MG_External::GLESFunctionsTable& BackendObject_DirectGLES::GetGLESFunctions() const {
+        return m_GLESFunctions;
+    }
+
+    const MG_External::EGLFunctionsTable& BackendObject_DirectGLES::GetEGLFunctions() const {
+        return m_EGLFunctions;
+    }
+} // namespace MobileGL::MG_Backend::DirectGLES