video_core: Enable GL SPIR-V shaders

src/video_core/renderer_opengl/gl_compute_pipeline.cpp

@@ -5,6 +5,7 @@
 #include <cstring>
 
 #include "common/cityhash.h"
+#include "common/settings.h" // for enum class Settings::ShaderBackend
 #include "video_core/renderer_opengl/gl_compute_pipeline.h"
 #include "video_core/renderer_opengl/gl_shader_manager.h"
 #include "video_core/renderer_opengl/gl_shader_util.h"
@@ -40,15 +41,23 @@ ComputePipeline::ComputePipeline(const Device& device, TextureCache& texture_cac
                                  BufferCache& buffer_cache_, Tegra::MemoryManager& gpu_memory_,
                                  Tegra::Engines::KeplerCompute& kepler_compute_,
                                  ProgramManager& program_manager_, const Shader::Info& info_,
-                                 std::string code)
+                                 std::string code, std::vector<u32> code_v)
     : texture_cache{texture_cache_}, buffer_cache{buffer_cache_}, gpu_memory{gpu_memory_},
       kepler_compute{kepler_compute_}, program_manager{program_manager_}, info{info_} {
-    if (device.UseAssemblyShaders()) {
+    switch (device.GetShaderBackend()) {
-        assembly_program = CompileProgram(code, GL_COMPUTE_PROGRAM_NV);
+    case Settings::ShaderBackend::GLSL:
-    } else {
         source_program.handle = glCreateProgram();
         AttachShader(GL_COMPUTE_SHADER, source_program.handle, code);
         LinkProgram(source_program.handle);
+        break;
+    case Settings::ShaderBackend::GLASM:
+        assembly_program = CompileProgram(code, GL_COMPUTE_PROGRAM_NV);
+        break;
+    case Settings::ShaderBackend::SPIRV:
+        source_program.handle = glCreateProgram();
+        AttachShader(GL_COMPUTE_SHADER, source_program.handle, code_v);
+        LinkProgram(source_program.handle);
+        break;
     }
     std::copy_n(info.constant_buffer_used_sizes.begin(), uniform_buffer_sizes.size(),
                 uniform_buffer_sizes.begin());

src/video_core/renderer_opengl/gl_compute_pipeline.h

@@ -54,7 +54,7 @@ public:
                              BufferCache& buffer_cache_, Tegra::MemoryManager& gpu_memory_,
                              Tegra::Engines::KeplerCompute& kepler_compute_,
                              ProgramManager& program_manager_, const Shader::Info& info_,
-                             std::string code);
+                             std::string code, std::vector<u32> code_v);
 
     void Configure();
 

src/video_core/renderer_opengl/gl_device.cpp

@@ -177,6 +177,11 @@ Device::Device() {
         GLAD_GL_NV_gpu_program5 && GLAD_GL_NV_compute_program5 && GLAD_GL_NV_transform_feedback &&
         GLAD_GL_NV_transform_feedback2;
 
+    shader_backend = (Settings::values.shader_backend.GetValue() ==
+                      Settings::ShaderBackend::GLASM) == use_assembly_shaders
+                         ? Settings::values.shader_backend.GetValue()
+                         : Settings::ShaderBackend::GLSL;
+
     // Blocks AMD and Intel OpenGL drivers on Windows from using asynchronous shader compilation.
     use_asynchronous_shaders = Settings::values.use_asynchronous_shaders.GetValue() &&
                                !(is_amd || (is_intel && !is_linux));
@@ -188,8 +193,7 @@ Device::Device() {
     LOG_INFO(Render_OpenGL, "Renderer_BrokenTextureViewFormats: {}",
              has_broken_texture_view_formats);
 
-    if (Settings::values.shader_backend.GetValue() == Settings::ShaderBackend::GLASM &&
+    if (shader_backend == Settings::ShaderBackend::GLASM && !use_assembly_shaders) {
-        !use_assembly_shaders) {
         LOG_ERROR(Render_OpenGL, "Assembly shaders enabled but not supported");
     }
 

src/video_core/renderer_opengl/gl_device.h

@@ -8,6 +8,10 @@
 #include "common/common_types.h"
 #include "shader_recompiler/stage.h"
 
+namespace Settings {
+enum class ShaderBackend : u32;
+};
+
 namespace OpenGL {
 
 class Device {
@@ -148,6 +152,10 @@ public:
         return need_fastmath_off;
     }
 
+    Settings::ShaderBackend GetShaderBackend() const {
+        return shader_backend;
+    }
+
 private:
     static bool TestVariableAoffi();
     static bool TestPreciseBug();
@@ -159,6 +167,9 @@ private:
     u32 max_varyings{};
     u32 max_compute_shared_memory_size{};
     u32 max_glasm_storage_buffer_blocks{};
+
+    Settings::ShaderBackend shader_backend{};
+
     bool has_warp_intrinsics{};
     bool has_shader_ballot{};
     bool has_vertex_viewport_layer{};

src/video_core/renderer_opengl/gl_graphics_pipeline.cpp

@@ -3,7 +3,11 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
+#include <array>
+#include <string>
+#include <vector>
 
+#include "common/settings.h" // for enum class Settings::ShaderBackend
 #include "common/thread_worker.h"
 #include "shader_recompiler/shader_info.h"
 #include "video_core/renderer_opengl/gl_graphics_pipeline.h"
@@ -179,7 +183,8 @@ GraphicsPipeline::GraphicsPipeline(
     Tegra::MemoryManager& gpu_memory_, Tegra::Engines::Maxwell3D& maxwell3d_,
     ProgramManager& program_manager_, StateTracker& state_tracker_, ShaderWorker* thread_worker,
     VideoCore::ShaderNotify* shader_notify, std::array<std::string, 5> sources,
-    const std::array<const Shader::Info*, 5>& infos, const GraphicsPipelineKey& key_)
+    std::array<std::vector<u32>, 5> sources_spirv, const std::array<const Shader::Info*, 5>& infos,
+    const GraphicsPipelineKey& key_)
     : texture_cache{texture_cache_}, buffer_cache{buffer_cache_},
       gpu_memory{gpu_memory_}, maxwell3d{maxwell3d_}, program_manager{program_manager_},
       state_tracker{state_tracker_}, key{key_} {
@@ -232,19 +237,34 @@ GraphicsPipeline::GraphicsPipeline(
     if (key.xfb_enabled && device.UseAssemblyShaders()) {
         GenerateTransformFeedbackState();
     }
-    auto func{[this, device, sources, shader_notify](ShaderContext::Context*) mutable {
+    auto func{
+        [this, device, sources, sources_spirv, shader_notify](ShaderContext::Context*) mutable {
             if (!device.UseAssemblyShaders()) {
                 program.handle = glCreateProgram();
             }
             for (size_t stage = 0; stage < 5; ++stage) {
+                switch (device.GetShaderBackend()) {
+                case Settings::ShaderBackend::GLSL: {
                     const auto code{sources[stage]};
                     if (code.empty()) {
                         continue;
                     }
-            if (device.UseAssemblyShaders()) {
-                assembly_programs[stage] = CompileProgram(code, AssemblyStage(stage));
-            } else {
                     AttachShader(Stage(stage), program.handle, code);
+                } break;
+                case Settings::ShaderBackend::GLASM: {
+                    const auto code{sources[stage]};
+                    if (code.empty()) {
+                        continue;
+                    }
+                    assembly_programs[stage] = CompileProgram(code, AssemblyStage(stage));
+                } break;
+                case Settings::ShaderBackend::SPIRV: {
+                    const auto code{sources_spirv[stage]};
+                    if (code.empty()) {
+                        continue;
+                    }
+                    AttachShader(Stage(stage), program.handle, code);
+                } break;
                 }
             }
             if (!device.UseAssemblyShaders()) {

src/video_core/renderer_opengl/gl_graphics_pipeline.h

@@ -78,6 +78,7 @@ public:
                               ProgramManager& program_manager_, StateTracker& state_tracker_,
                               ShaderWorker* thread_worker, VideoCore::ShaderNotify* shader_notify,
                               std::array<std::string, 5> sources,
+                              std::array<std::vector<u32>, 5> sources_spirv,
                               const std::array<const Shader::Info*, 5>& infos,
                               const GraphicsPipelineKey& key_);
 

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -15,6 +15,7 @@
 #include "common/fs/path_util.h"
 #include "common/logging/log.h"
 #include "common/scope_exit.h"
+#include "common/settings.h"
 #include "common/thread_worker.h"
 #include "core/core.h"
 #include "shader_recompiler/backend/glasm/emit_glasm.h"
@@ -415,6 +416,7 @@ std::unique_ptr<GraphicsPipeline> ShaderCache::CreateGraphicsPipeline(
 
     OGLProgram source_program;
     std::array<std::string, 5> sources;
+    std::array<std::vector<u32>, 5> sources_spirv;
     Shader::Backend::Bindings binding;
     Shader::IR::Program* previous_program{};
     const bool use_glasm{device.UseAssemblyShaders()};
@@ -431,17 +433,23 @@ std::unique_ptr<GraphicsPipeline> ShaderCache::CreateGraphicsPipeline(
 
         const auto runtime_info{
             MakeRuntimeInfo(key, program, previous_program, glasm_use_storage_buffers, use_glasm)};
-        if (use_glasm) {
+        switch (device.GetShaderBackend()) {
-            sources[stage_index] = EmitGLASM(profile, runtime_info, program, binding);
+        case Settings::ShaderBackend::GLSL:
-        } else {
             sources[stage_index] = EmitGLSL(profile, runtime_info, program, binding);
+            break;
+        case Settings::ShaderBackend::GLASM:
+            sources[stage_index] = EmitGLASM(profile, runtime_info, program, binding);
+            break;
+        case Settings::ShaderBackend::SPIRV:
+            sources_spirv[stage_index] = EmitSPIRV(profile, runtime_info, program, binding);
+            break;
         }
         previous_program = &program;
     }
     auto* const thread_worker{build_in_parallel ? workers.get() : nullptr};
-    return std::make_unique<GraphicsPipeline>(device, texture_cache, buffer_cache, gpu_memory,
+    return std::make_unique<GraphicsPipeline>(
-                                              maxwell3d, program_manager, state_tracker,
+        device, texture_cache, buffer_cache, gpu_memory, maxwell3d, program_manager, state_tracker,
-                                              thread_worker, &shader_notify, sources, infos, key);
+        thread_worker, &shader_notify, sources, sources_spirv, infos, key);
 
 } catch (Shader::Exception& exception) {
     LOG_ERROR(Render_OpenGL, "{}", exception.what());
@@ -478,10 +486,24 @@ std::unique_ptr<ComputePipeline> ShaderCache::CreateComputePipeline(
     }
     Shader::RuntimeInfo info;
     info.glasm_use_storage_buffers = num_storage_buffers <= device.GetMaxGLASMStorageBufferBlocks();
-    const std::string code{device.UseAssemblyShaders() ? EmitGLASM(profile, info, program)
+
-                                                       : EmitGLSL(profile, program)};
+    std::string code{};
+    std::vector<u32> code_spirv;
+    switch (device.GetShaderBackend()) {
+    case Settings::ShaderBackend::GLSL:
+        code = EmitGLSL(profile, program);
+        break;
+    case Settings::ShaderBackend::GLASM:
+        code = EmitGLASM(profile, info, program);
+        break;
+    case Settings::ShaderBackend::SPIRV:
+        code_spirv = EmitSPIRV(profile, program);
+        break;
+    }
+
     return std::make_unique<ComputePipeline>(device, texture_cache, buffer_cache, gpu_memory,
-                                             kepler_compute, program_manager, program.info, code);
+                                             kepler_compute, program_manager, program.info, code,
+                                             code_spirv);
 } catch (Shader::Exception& exception) {
     LOG_ERROR(Render_OpenGL, "{}", exception.what());
     return nullptr;