From dacf83ac0257727a48c971ca1cfcd220976c461f Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 28 Dec 2019 21:45:56 -0300
Subject: renderer_opengl: Reintroduce dirty flags for render targets

---
 .../renderer_opengl/gl_state_tracker.cpp           | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)

(limited to 'src/video_core/renderer_opengl/gl_state_tracker.cpp')

diff --git a/src/video_core/renderer_opengl/gl_state_tracker.cpp b/src/video_core/renderer_opengl/gl_state_tracker.cpp
index e69de29bb..268b9351e 100644
--- a/src/video_core/renderer_opengl/gl_state_tracker.cpp
+++ b/src/video_core/renderer_opengl/gl_state_tracker.cpp
@@ -0,0 +1,85 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <array>
+#include <cstddef>
+#include <type_traits>
+
+#include "common/common_types.h"
+#include "core/core.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/gpu.h"
+#include "video_core/renderer_opengl/gl_state_tracker.h"
+
+#define OFF(field_name) MAXWELL3D_REG_INDEX(field_name)
+#define NUM(field_name) (sizeof(Maxwell3D::Regs::field_name) / sizeof(u32))
+
+namespace OpenGL {
+
+namespace {
+
+using namespace Dirty;
+using namespace VideoCommon::Dirty;
+using Tegra::Engines::Maxwell3D;
+using Regs = Maxwell3D::Regs;
+using Dirty = std::remove_reference_t<decltype(Maxwell3D::dirty)>;
+using Tables = std::remove_reference_t<decltype(Maxwell3D::dirty.tables)>;
+using Table = std::remove_reference_t<decltype(Maxwell3D::dirty.tables[0])>;
+
+template <typename Integer>
+void FillBlock(Table& table, std::size_t begin, std::size_t num, Integer dirty_index) {
+    const auto it = std::begin(table) + begin;
+    std::fill(it, it + num, static_cast<u8>(dirty_index));
+}
+
+template <typename Integer1, typename Integer2>
+void FillBlock(Tables& tables, std::size_t begin, std::size_t num, Integer1 index_a,
+               Integer2 index_b) {
+    FillBlock(tables[0], begin, num, index_a);
+    FillBlock(tables[1], begin, num, index_b);
+}
+
+void SetupDirtyRenderTargets(Tables& tables) {
+    static constexpr std::size_t num_per_rt = NUM(rt[0]);
+    static constexpr std::size_t begin = OFF(rt);
+    static constexpr std::size_t num = num_per_rt * Regs::NumRenderTargets;
+    for (std::size_t rt = 0; rt < Regs::NumRenderTargets; ++rt) {
+        FillBlock(tables[0], begin + rt * num_per_rt, num_per_rt, ColorBuffer0 + rt);
+    }
+    FillBlock(tables[1], begin, num, RenderTargets);
+
+    static constexpr std::array zeta_flags{ZetaBuffer, RenderTargets};
+    for (std::size_t i = 0; i < std::size(zeta_flags); ++i) {
+        const u8 flag = zeta_flags[i];
+        auto& table = tables[i];
+        table[OFF(zeta_enable)] = flag;
+        table[OFF(zeta_width)] = flag;
+        table[OFF(zeta_height)] = flag;
+        FillBlock(table, OFF(zeta), NUM(zeta), flag);
+    }
+}
+
+} // Anonymous namespace
+
+StateTracker::StateTracker(Core::System& system) : system{system} {}
+
+void StateTracker::Initialize() {
+    auto& dirty = system.GPU().Maxwell3D().dirty;
+    std::size_t entry_index = 0;
+    const auto AddEntry = [&dirty, &entry_index](std::size_t dirty_register) {
+        dirty.on_write_stores[entry_index++] = static_cast<u8>(dirty_register);
+    };
+
+    AddEntry(RenderTargets);
+    for (std::size_t i = 0; i < Regs::NumRenderTargets; ++i) {
+        AddEntry(ColorBuffer0 + i);
+    }
+    AddEntry(ZetaBuffer);
+
+    auto& tables = dirty.tables;
+    SetupDirtyRenderTargets(tables);
+}
+
+} // namespace OpenGL
-- 
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