[Feat] (MG_State/Program, MG_Impl/Program): skeleton and initial impl of program/shader state machine

2026-09-08 04:08:32 +09:00 · 2025-08-09 13:08:26 +08:00
parent 4b4b876a25
commit 4ecd4e4a07
9 changed files with 528 additions and 0 deletions
@@ -0,0 +1,51 @@
+#include "../../../Includes.h"
+
+namespace MobileGL {
+    namespace MG_State {
+        namespace GLState {
+            void ProgramObject::AttachShader(SharedPtr<ShaderObject> shader) {
+                m_shaders.emplace_back(shader);
+            }
+
+            void ProgramObject::DetachShader(SharedPtr<ShaderObject> shader) {
+                auto count = std::erase_if(m_shaders,
+                    [shader](const SharedPtr<ShaderObject>& s) {
+                        return s.get() == shader.get();
+                    });
+
+                if (count == 0) {
+                    // FIXME: handle error here
+                    THROW_EXCEPTION("Program object does not have such shader object attached");
+                }
+            }
+
+            void ProgramObject::Link() {
+                Vector<GLenum> shaderTypes(m_shaders.size());
+                Vector<SharedPtr<glslang::TShader>> shaders(m_shaders.size());
+                for (SizeT i = 0; i < m_shaders.size(); i++) {
+                    shaderTypes[i] = GetGLShaderTypeByMGLShaderStage(m_shaders[i]->m_stage);
+                    shaders[i] = m_shaders[i]->m_shader;
+                }
+
+                MG_Util::ShaderTranspiler::ProgramAttrib attrib {
+                    .shaderTypes = Move(shaderTypes),
+                    .shaders = Move(shaders),
+                };
+
+                auto result = MG_Util::ShaderTranspiler::ShaderCompiler::LinkProgram(attrib);
+                if (result) {
+                    m_linkStatus = true;
+                    m_programBinary = Move(result.value());
+                } else {
+                    m_linkStatus = false;
+                    m_infoLog = result.error().log;
+
+                    const std::string e =
+                        std::format("Shader link failed: \nerrc: {}\nmsg: {}\n",
+                            result.error().errc, result.error().log);
+                    THROW_EXCEPTION(e);
+                }
+            }
+        }
+    }
+}