video_core: Eliminate the g_renderer global variable

We move the initialization of the renderer to the core class, while
keeping the creation of it and any other specifics in video_core. This
way we can ensure that the renderer is initialized and doesn't give
unfettered access to the renderer. This also makes dependencies on types
more explicit.

For example, the GPU class doesn't need to depend on the
existence of a renderer, it only needs to care about whether or not it
has a rasterizer, but since it was accessing the global variable, it was
also making the renderer a part of its dependency chain. By adjusting
the interface, we can get rid of this dependency.

2 files changed, 12 insertions, 6 deletions

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 0e205ed72..a235b543e 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -19,8 +19,8 @@ namespace Engines {
 /// First register id that is actually a Macro call.
 constexpr u32 MacroRegistersStart = 0xE00;
 
-Maxwell3D::Maxwell3D(MemoryManager& memory_manager)
-    : memory_manager(memory_manager), macro_interpreter(*this) {}
+Maxwell3D::Maxwell3D(VideoCore::RasterizerInterface& rasterizer, MemoryManager& memory_manager)
+    : memory_manager(memory_manager), rasterizer{rasterizer}, macro_interpreter(*this) {}
 
 void Maxwell3D::CallMacroMethod(u32 method, std::vector<u32> parameters) {
     auto macro_code = uploaded_macros.find(method);
@@ -130,7 +130,7 @@ void Maxwell3D::WriteReg(u32 method, u32 value, u32 remaining_params) {
         break;
     }
 
-    VideoCore::g_renderer->Rasterizer()->NotifyMaxwellRegisterChanged(method);
+    rasterizer.NotifyMaxwellRegisterChanged(method);
 
     if (debug_context) {
         debug_context->OnEvent(Tegra::DebugContext::Event::MaxwellCommandProcessed, nullptr);
@@ -218,7 +218,7 @@ void Maxwell3D::DrawArrays() {
     }
 
     const bool is_indexed{regs.index_array.count && !regs.vertex_buffer.count};
-    VideoCore::g_renderer->Rasterizer()->AccelerateDrawBatch(is_indexed);
+    rasterizer.AccelerateDrawBatch(is_indexed);
 
     // TODO(bunnei): Below, we reset vertex count so that we can use these registers to determine if
     // the game is trying to draw indexed or direct mode. This needs to be verified on HW still -
@@ -393,7 +393,7 @@ void Maxwell3D::ProcessClearBuffers() {
            regs.clear_buffers.R == regs.clear_buffers.B &&
            regs.clear_buffers.R == regs.clear_buffers.A);
 
-    VideoCore::g_renderer->Rasterizer()->Clear();
+    rasterizer.Clear();
 }
 
 } // namespace Engines
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 3c32f1067..4d0ff96a5 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -17,6 +17,10 @@
 #include "video_core/memory_manager.h"
 #include "video_core/textures/texture.h"
 
+namespace VideoCore {
+class RasterizerInterface;
+}
+
 namespace Tegra::Engines {
 
 #define MAXWELL3D_REG_INDEX(field_name)                                                            \
@@ -24,7 +28,7 @@ namespace Tegra::Engines {
 
 class Maxwell3D final {
 public:
-    explicit Maxwell3D(MemoryManager& memory_manager);
+    explicit Maxwell3D(VideoCore::RasterizerInterface& rasterizer, MemoryManager& memory_manager);
     ~Maxwell3D() = default;
 
     /// Register structure of the Maxwell3D engine.
@@ -818,6 +822,8 @@ public:
     Texture::FullTextureInfo GetStageTexture(Regs::ShaderStage stage, size_t offset) const;
 
 private:
+    VideoCore::RasterizerInterface& rasterizer;
+
     std::unordered_map<u32, std::vector<u32>> uploaded_macros;
 
     /// Macro method that is currently being executed / being fed parameters.