gl_device: Implement interface and add uniform offset alignment

src/video_core/CMakeLists.txt

@@ -36,6 +36,8 @@ add_library(video_core STATIC
     renderer_base.h
     renderer_opengl/gl_buffer_cache.cpp
     renderer_opengl/gl_buffer_cache.h
+    renderer_opengl/gl_device.cpp
+    renderer_opengl/gl_device.h
     renderer_opengl/gl_global_cache.cpp
     renderer_opengl/gl_global_cache.h
     renderer_opengl/gl_primitive_assembler.cpp

src/video_core/renderer_opengl/gl_device.cpp

@@ -0,0 +1,27 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstddef>
+#include <glad/glad.h>
+
+#include "video_core/renderer_opengl/gl_device.h"
+
+namespace OpenGL {
+
+namespace {
+template <typename T>
+T GetInteger(GLenum pname) {
+    GLint temporary;
+    glGetIntegerv(pname, &temporary);
+    return static_cast<T>(temporary);
+}
+} // Anonymous namespace
+
+Device::Device() = default;
+
+void Device::Initialize() {
+    uniform_buffer_alignment = GetInteger<std::size_t>(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
+}
+
+} // namespace OpenGL

src/video_core/renderer_opengl/gl_device.h

@@ -0,0 +1,25 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstddef>
+
+namespace OpenGL {
+
+class Device {
+public:
+    Device();
+
+    void Initialize();
+
+    std::size_t GetUniformBufferAlignment() const {
+        return uniform_buffer_alignment;
+    }
+
+private:
+    std::size_t uniform_buffer_alignment{};
+};
+
+} // namespace OpenGL

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -107,14 +107,14 @@ RasterizerOpenGL::RasterizerOpenGL(Core::System& system, ScreenInfo& info)
         state.texture_units[i].sampler = texture_samplers[i].sampler.handle;
     }
 
+    device.Initialize();
+
     OpenGLState::ApplyDefaultState();
 
     shader_program_manager = std::make_unique<GLShader::ProgramManager>();
     state.draw.shader_program = 0;
     state.Apply();
 
-    glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &uniform_buffer_alignment);
-
     LOG_DEBUG(Render_OpenGL, "Sync fixed function OpenGL state here");
     CheckExtensions();
 }
@@ -321,8 +321,8 @@ void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
 
         GLShader::MaxwellUniformData ubo{};
         ubo.SetFromRegs(gpu, stage);
-        const GLintptr offset = buffer_cache.UploadHostMemory(
-            &ubo, sizeof(ubo), static_cast<std::size_t>(uniform_buffer_alignment));
+        const GLintptr offset =
+            buffer_cache.UploadHostMemory(&ubo, sizeof(ubo), device.GetUniformBufferAlignment());
 
         // Bind the emulation info buffer
         bind_ubo_pushbuffer.Push(buffer_cache.GetHandle(), offset,
@@ -706,23 +706,24 @@ void RasterizerOpenGL::DrawArrays() {
     // Add space for index buffer (keeping in mind non-core primitives)
     switch (regs.draw.topology) {
     case Maxwell::PrimitiveTopology::Quads:
-        buffer_size = Common::AlignUp<std::size_t>(buffer_size, 4) +
+        buffer_size = Common::AlignUp(buffer_size, 4) +
                       primitive_assembler.CalculateQuadSize(regs.vertex_buffer.count);
         break;
     default:
         if (is_indexed) {
-            buffer_size = Common::AlignUp<std::size_t>(buffer_size, 4) + CalculateIndexBufferSize();
+            buffer_size = Common::AlignUp(buffer_size, 4) + CalculateIndexBufferSize();
         }
         break;
     }
 
     // Uniform space for the 5 shader stages
-    buffer_size =
-        Common::AlignUp<std::size_t>(buffer_size, 4) +
-        (sizeof(GLShader::MaxwellUniformData) + uniform_buffer_alignment) * Maxwell::MaxShaderStage;
+    buffer_size = Common::AlignUp<std::size_t>(buffer_size, 4) +
+                  (sizeof(GLShader::MaxwellUniformData) + device.GetUniformBufferAlignment()) *
+                      Maxwell::MaxShaderStage;
 
     // Add space for at least 18 constant buffers
-    buffer_size += Maxwell::MaxConstBuffers * (MaxConstbufferSize + uniform_buffer_alignment);
+    buffer_size +=
+        Maxwell::MaxConstBuffers * (MaxConstbufferSize + device.GetUniformBufferAlignment());
 
     const bool invalidate = buffer_cache.Map(buffer_size);
     if (invalidate) {
@@ -939,8 +940,8 @@ void RasterizerOpenGL::SetupConstBuffers(Tegra::Engines::Maxwell3D::Regs::Shader
         size = Common::AlignUp(size, sizeof(GLvec4));
         ASSERT_MSG(size <= MaxConstbufferSize, "Constbuffer too big");
 
-        const GLintptr const_buffer_offset = buffer_cache.UploadMemory(
-            buffer.address, size, static_cast<std::size_t>(uniform_buffer_alignment));
+        const GLintptr const_buffer_offset =
+            buffer_cache.UploadMemory(buffer.address, size, device.GetUniformBufferAlignment());
 
         bind_ubo_pushbuffer.Push(buffer_cache.GetHandle(), const_buffer_offset, size);
     }

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -21,6 +21,7 @@
 #include "video_core/rasterizer_cache.h"
 #include "video_core/rasterizer_interface.h"
 #include "video_core/renderer_opengl/gl_buffer_cache.h"
+#include "video_core/renderer_opengl/gl_device.h"
 #include "video_core/renderer_opengl/gl_global_cache.h"
 #include "video_core/renderer_opengl/gl_primitive_assembler.h"
 #include "video_core/renderer_opengl/gl_rasterizer_cache.h"
@@ -213,6 +214,8 @@ private:
 
     ScreenInfo& screen_info;
 
+    Device device;
+
     std::unique_ptr<GLShader::ProgramManager> shader_program_manager;
     std::map<std::array<Tegra::Engines::Maxwell3D::Regs::VertexAttribute,
                         Tegra::Engines::Maxwell3D::Regs::NumVertexAttributes>,
@@ -228,7 +231,6 @@ private:
     static constexpr std::size_t STREAM_BUFFER_SIZE = 128 * 1024 * 1024;
     OGLBufferCache buffer_cache;
     PrimitiveAssembler primitive_assembler{buffer_cache};
-    GLint uniform_buffer_alignment;
 
     BindBuffersRangePushBuffer bind_ubo_pushbuffer{GL_UNIFORM_BUFFER};
     BindBuffersRangePushBuffer bind_ssbo_pushbuffer{GL_SHADER_STORAGE_BUFFER};