gl_shader_decompiler: Use variable AOFFI on supported hardware

1 files changed, 21 insertions, 3 deletions

diff --git a/src/video_core/renderer_opengl/gl_device.cpp b/src/video_core/renderer_opengl/gl_device.cpp
index b7ca3dca4..b6d9e0ddb 100644
--- a/src/video_core/renderer_opengl/gl_device.cpp
+++ b/src/video_core/renderer_opengl/gl_device.cpp
@@ -5,6 +5,7 @@
 #include <cstddef>
 #include <glad/glad.h>
 
+#include "common/logging/log.h"
 #include "video_core/renderer_opengl/gl_device.h"
 
 namespace OpenGL {
@@ -18,10 +19,27 @@ T GetInteger(GLenum pname) {
 }
 } // Anonymous namespace
 
-Device::Device() = default;
-
-void Device::Initialize() {
+Device::Device() {
     uniform_buffer_alignment = GetInteger<std::size_t>(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
+    has_variable_aoffi = TestVariableAoffi();
+}
+
+bool Device::TestVariableAoffi() {
+    const GLchar* AOFFI_TEST = R"(#version 430 core
+uniform sampler2D tex;
+uniform ivec2 variable_offset;
+void main() {
+    gl_Position = textureOffset(tex, vec2(0), variable_offset);
+}
+)";
+    const GLuint shader{glCreateShaderProgramv(GL_VERTEX_SHADER, 1, &AOFFI_TEST)};
+    GLint link_status{};
+    glGetProgramiv(shader, GL_LINK_STATUS, &link_status);
+    glDeleteProgram(shader);
+
+    const bool supported{link_status == GL_TRUE};
+    LOG_INFO(Render_OpenGL, "Renderer_VariableAOFFI: {}", supported);
+    return supported;
 }
 
 } // namespace OpenGL