From c5ca4fe451c398542f4f6c5e468e0bb96866175d Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 20 May 2021 16:53:51 -0300
Subject: renderer_opengl: State track assembly programs

---
 src/video_core/renderer_opengl/gl_shader_manager.h | 51 ++++++++++++++++++++--
 1 file changed, 48 insertions(+), 3 deletions(-)

(limited to 'src/video_core/renderer_opengl/gl_shader_manager.h')

diff --git a/src/video_core/renderer_opengl/gl_shader_manager.h b/src/video_core/renderer_opengl/gl_shader_manager.h
index 70781d6f5..48669b3cd 100644
--- a/src/video_core/renderer_opengl/gl_shader_manager.h
+++ b/src/video_core/renderer_opengl/gl_shader_manager.h
@@ -4,24 +4,69 @@
 
 #pragma once
 
+#include <array>
+#include <span>
+
 #include <glad/glad.h>
 
+#include "video_core/renderer_opengl/gl_resource_manager.h"
+
+#pragma optimize("", off)
+
 namespace OpenGL {
 
 class ProgramManager {
+    static constexpr size_t NUM_STAGES = 5;
+
+    static constexpr std::array ASSEMBLY_PROGRAM_ENUMS{
+        GL_VERTEX_PROGRAM_NV,   GL_TESS_CONTROL_PROGRAM_NV, GL_TESS_EVALUATION_PROGRAM_NV,
+        GL_GEOMETRY_PROGRAM_NV, GL_FRAGMENT_PROGRAM_NV,
+    };
+
 public:
     void BindProgram(GLuint program) {
-        if (bound_program == program) {
+        if (current_source_program == program) {
             return;
         }
-        bound_program = program;
+        current_source_program = program;
         glUseProgram(program);
     }
 
+    void BindAssemblyPrograms(std::span<const OGLAssemblyProgram, NUM_STAGES> programs,
+                              u32 stage_mask) {
+        const u32 changed_mask = current_assembly_mask ^ stage_mask;
+        current_assembly_mask = stage_mask;
+
+        if (changed_mask != 0) {
+            for (size_t stage = 0; stage < NUM_STAGES; ++stage) {
+                if (((changed_mask >> stage) & 1) != 0) {
+                    if (((stage_mask >> stage) & 1) != 0) {
+                        glEnable(ASSEMBLY_PROGRAM_ENUMS[stage]);
+                    } else {
+                        glDisable(ASSEMBLY_PROGRAM_ENUMS[stage]);
+                    }
+                }
+            }
+        }
+        for (size_t stage = 0; stage < NUM_STAGES; ++stage) {
+            if (current_assembly_programs[stage] != programs[stage].handle) {
+                current_assembly_programs[stage] = programs[stage].handle;
+                glBindProgramARB(ASSEMBLY_PROGRAM_ENUMS[stage], programs[stage].handle);
+            }
+        }
+        if (current_source_program != 0) {
+            current_source_program = 0;
+            glUseProgram(0);
+        }
+    }
+
     void RestoreGuestCompute() {}
 
 private:
-    GLuint bound_program = 0;
+    GLuint current_source_program = 0;
+
+    u32 current_assembly_mask = 0;
+    std::array<GLuint, NUM_STAGES> current_assembly_programs;
 };
 
 } // namespace OpenGL
-- 
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