[android, tu] Adjusted PoD of Vertex/ Buffers for older turnip drivers (#3621)

This PR aims to return an older way to bind and host vertex/ buffers (via toggle), which had a bunch of indirection and added unnecessary overhead during the drawing phase; current new approach adds just PoD for this operations, which seems to not be acceptable for older turnip drivers.

Meanwhile the performance improvements are gonna be enabled only if the toggle is turned on, it will be required to use newer turnip drivers to make it work (26.0+), default behavior will allow older drivers work as intended.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3621
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: PavelBARABANOV <pavelbarabanov94@gmail.com>
Co-committed-by: PavelBARABANOV <pavelbarabanov94@gmail.com>

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/BooleanSetting.kt

@@ -25,6 +25,7 @@ enum class BooleanSetting(override val key: String) : AbstractBooleanSetting {
     RENDERER_ASYNCHRONOUS_SHADERS("use_asynchronous_shaders"),
     RENDERER_REACTIVE_FLUSHING("use_reactive_flushing"),
     ENABLE_BUFFER_HISTORY("enable_buffer_history"),
+    USE_OPTIMIZED_VERTEX_BUFFERS("use_optimized_vertex_buffers"),
     SYNC_MEMORY_OPERATIONS("sync_memory_operations"),
     BUFFER_REORDER_DISABLE("disable_buffer_reorder"),
     RENDERER_DEBUG("debug"),

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/view/SettingsItem.kt

@@ -795,6 +795,13 @@ abstract class SettingsItem(
                     descriptionId = R.string.enable_buffer_history_description
                 )
             )
+            put(
+                SwitchSetting(
+                    BooleanSetting.USE_OPTIMIZED_VERTEX_BUFFERS,
+                    titleId = R.string.use_optimized_vertex_buffers,
+                    descriptionId = R.string.use_optimized_vertex_buffers_description
+                )
+            )
             put(
                 SwitchSetting(
                     BooleanSetting.SYNC_MEMORY_OPERATIONS,

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/ui/SettingsFragmentPresenter.kt

@@ -278,6 +278,7 @@ class SettingsFragmentPresenter(
             add(BooleanSetting.RENDERER_FORCE_MAX_CLOCK.key)
             add(BooleanSetting.RENDERER_REACTIVE_FLUSHING.key)
             add(BooleanSetting.ENABLE_BUFFER_HISTORY.key)
+            add(BooleanSetting.USE_OPTIMIZED_VERTEX_BUFFERS.key)
 
             add(HeaderSetting(R.string.hacks))
 

src/android/app/src/main/res/values/strings.xml

@@ -500,7 +500,8 @@
     <string name="renderer_reactive_flushing_description">Improves rendering accuracy in some games at the cost of performance.</string>
     <string name="enable_buffer_history">Enable buffer history</string>
     <string name="enable_buffer_history_description">Enables access to previous buffer states. This option may improve rendering quality and performance consistency in some games.</string>
-
+    <string name="use_optimized_vertex_buffers">Optimized Vertex Buffers</string>
+    <string name="use_optimized_vertex_buffers_description">Enables optimized vertex buffer binding for improved performance. Requires Mesa 26.0+ Turnip drivers. Will crash on older drivers.</string>
 
     <string name="hacks">Hacks</string>
 

src/common/settings.h

@@ -519,6 +519,16 @@ struct Values {
                                                   true,
                                                   true};
 
+#ifdef ANDROID
+    SwitchableSetting<bool> use_optimized_vertex_buffers{linkage,
+                                                 false,
+                                                 "use_optimized_vertex_buffers",
+                                                 Category::RendererAdvanced,
+                                                 Specialization::Default,
+                                                 true,
+                                                 true};
+#endif
+
     // Renderer Hacks //
     SwitchableSetting<GpuOverclock> fast_gpu_time{linkage,
                                                   GpuOverclock::Medium,

src/video_core/buffer_cache/buffer_cache.h

@@ -805,6 +805,14 @@ void BufferCache<P>::UpdateVertexBufferSlot(u32 index, const Binding& binding) {
 
 template <class P>
 void BufferCache<P>::BindHostVertexBuffers() {
+
+#ifdef ANDROID
+    const bool use_optimized_vertex_buffers = Settings::values.use_optimized_vertex_buffers.GetValue();
+#else
+    constexpr bool use_optimized_vertex_buffers = true;
+#endif
+
+    if (use_optimized_vertex_buffers) {
         auto& flags = maxwell3d->dirty.flags;
         u32 enabled_mask = enabled_vertex_buffers_mask;
         HostBindings<Buffer> bindings{};
@@ -846,6 +854,45 @@ void BufferCache<P>::BindHostVertexBuffers() {
             last_index = index;
         }
         flush_bindings();
+    } else {
+        HostBindings<typename P::Buffer> host_bindings;
+        bool any_valid{false};
+        auto& flags = maxwell3d->dirty.flags;
+        for (u32 index = 0; index < NUM_VERTEX_BUFFERS; ++index) {
+            const Binding& binding = channel_state->vertex_buffers[index];
+            Buffer& buffer = slot_buffers[binding.buffer_id];
+            TouchBuffer(buffer, binding.buffer_id);
+            SynchronizeBuffer(buffer, binding.device_addr, binding.size);
+            if (!flags[Dirty::VertexBuffer0 + index]) {
+                continue;
+            }
+            flags[Dirty::VertexBuffer0 + index] = false;
+
+            host_bindings.min_index = (std::min)(host_bindings.min_index, index);
+            host_bindings.max_index = (std::max)(host_bindings.max_index, index);
+            any_valid = true;
+        }
+
+        if (any_valid) {
+            host_bindings.max_index++;
+            for (u32 index = host_bindings.min_index; index < host_bindings.max_index; index++) {
+                flags[Dirty::VertexBuffer0 + index] = false;
+
+                const Binding& binding = channel_state->vertex_buffers[index];
+                Buffer& buffer = slot_buffers[binding.buffer_id];
+
+                const u32 stride = maxwell3d->regs.vertex_streams[index].stride;
+                const u32 offset = buffer.Offset(binding.device_addr);
+                buffer.MarkUsage(offset, binding.size);
+
+                host_bindings.buffers.push_back(&buffer);
+                host_bindings.offsets.push_back(offset);
+                host_bindings.sizes.push_back(binding.size);
+                host_bindings.strides.push_back(stride);
+            }
+            runtime.BindVertexBuffers(host_bindings);
+        }
+    }
 }
 
 template <class P>