Merge pull request #2867 from ReinUsesLisp/configure-framebuffers-clean

gl_rasterizer: Remove unused code paths from ConfigureFramebuffers

src/video_core/renderer_opengl/gl_framebuffer_cache.cpp

@@ -35,21 +35,16 @@ OGLFramebuffer FramebufferCacheOpenGL::CreateFramebuffer(const FramebufferCacheK
     local_state.draw.draw_framebuffer = framebuffer.handle;
     local_state.ApplyFramebufferState();
 
-    if (key.is_single_buffer) {
-        if (key.color_attachments[0] != GL_NONE && key.colors[0]) {
-            key.colors[0]->Attach(key.color_attachments[0], GL_DRAW_FRAMEBUFFER);
-            glDrawBuffer(key.color_attachments[0]);
-        } else {
-            glDrawBuffer(GL_NONE);
-        }
-    } else {
-        for (std::size_t index = 0; index < Maxwell::NumRenderTargets; ++index) {
-            if (key.colors[index]) {
-                key.colors[index]->Attach(GL_COLOR_ATTACHMENT0 + static_cast<GLenum>(index),
-                                          GL_DRAW_FRAMEBUFFER);
-            }
+    for (std::size_t index = 0; index < Maxwell::NumRenderTargets; ++index) {
+        if (key.colors[index]) {
+            key.colors[index]->Attach(GL_COLOR_ATTACHMENT0 + static_cast<GLenum>(index),
+                                      GL_DRAW_FRAMEBUFFER);
         }
+    }
+    if (key.colors_count) {
         glDrawBuffers(key.colors_count, key.color_attachments.data());
+    } else {
+        glDrawBuffer(GL_NONE);
     }
 
     if (key.zeta) {
@@ -67,9 +62,9 @@ std::size_t FramebufferCacheKey::Hash() const {
 }
 
 bool FramebufferCacheKey::operator==(const FramebufferCacheKey& rhs) const {
-    return std::tie(is_single_buffer, stencil_enable, colors_count, color_attachments, colors,
-                    zeta) == std::tie(rhs.is_single_buffer, rhs.stencil_enable, rhs.colors_count,
-                                      rhs.color_attachments, rhs.colors, rhs.zeta);
+    return std::tie(stencil_enable, colors_count, color_attachments, colors, zeta) ==
+           std::tie(rhs.stencil_enable, rhs.colors_count, rhs.color_attachments, rhs.colors,
+                    rhs.zeta);
 }
 
 } // namespace OpenGL

src/video_core/renderer_opengl/gl_framebuffer_cache.h

@@ -19,7 +19,6 @@
 namespace OpenGL {
 
 struct alignas(sizeof(u64)) FramebufferCacheKey {
-    bool is_single_buffer = false;
     bool stencil_enable = false;
     u16 colors_count = 0;
 

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -445,99 +445,51 @@ void RasterizerOpenGL::LoadDiskResources(const std::atomic_bool& stop_loading,
     shader_cache.LoadDiskCache(stop_loading, callback);
 }
 
-std::pair<bool, bool> RasterizerOpenGL::ConfigureFramebuffers(
-    OpenGLState& current_state, bool using_color_fb, bool using_depth_fb, bool preserve_contents,
-    std::optional<std::size_t> single_color_target) {
+void RasterizerOpenGL::ConfigureFramebuffers() {
     MICROPROFILE_SCOPE(OpenGL_Framebuffer);
     auto& gpu = system.GPU().Maxwell3D();
-    const auto& regs = gpu.regs;
-
-    const FramebufferConfigState fb_config_state{using_color_fb, using_depth_fb, preserve_contents,
-                                                 single_color_target};
-    if (fb_config_state == current_framebuffer_config_state && !gpu.dirty.render_settings) {
-        // Only skip if the previous ConfigureFramebuffers call was from the same kind (multiple or
-        // single color targets). This is done because the guest registers may not change but the
-        // host framebuffer may contain different attachments
-        return current_depth_stencil_usage;
+    if (!gpu.dirty.render_settings) {
+        return;
     }
     gpu.dirty.render_settings = false;
-    current_framebuffer_config_state = fb_config_state;
 
     texture_cache.GuardRenderTargets(true);
 
-    View depth_surface{};
-    if (using_depth_fb) {
-        depth_surface = texture_cache.GetDepthBufferSurface(preserve_contents);
-    } else {
-        texture_cache.SetEmptyDepthBuffer();
-    }
+    View depth_surface = texture_cache.GetDepthBufferSurface(true);
 
+    const auto& regs = gpu.regs;
+    state.framebuffer_srgb.enabled = regs.framebuffer_srgb != 0;
     UNIMPLEMENTED_IF(regs.rt_separate_frag_data == 0);
 
     // Bind the framebuffer surfaces
-    current_state.framebuffer_srgb.enabled = regs.framebuffer_srgb != 0;
-
     FramebufferCacheKey fbkey;
+    for (std::size_t index = 0; index < Maxwell::NumRenderTargets; ++index) {
+        View color_surface{texture_cache.GetColorBufferSurface(index, true)};
 
-    if (using_color_fb) {
-        if (single_color_target) {
-            // Used when just a single color attachment is enabled, e.g. for clearing a color buffer
-            View color_surface{
-                texture_cache.GetColorBufferSurface(*single_color_target, preserve_contents)};
-
-            if (color_surface) {
-                // Assume that a surface will be written to if it is used as a framebuffer, even if
-                // the shader doesn't actually write to it.
-                texture_cache.MarkColorBufferInUse(*single_color_target);
-            }
-
-            fbkey.is_single_buffer = true;
-            fbkey.color_attachments[0] =
-                GL_COLOR_ATTACHMENT0 + static_cast<GLenum>(*single_color_target);
-            fbkey.colors[0] = color_surface;
-            for (std::size_t index = 0; index < Maxwell::NumRenderTargets; ++index) {
-                if (index != *single_color_target) {
-                    texture_cache.SetEmptyColorBuffer(index);
-                }
-            }
-        } else {
-            // Multiple color attachments are enabled
-            for (std::size_t index = 0; index < Maxwell::NumRenderTargets; ++index) {
-                View color_surface{texture_cache.GetColorBufferSurface(index, preserve_contents)};
-
-                if (color_surface) {
-                    // Assume that a surface will be written to if it is used as a framebuffer, even
-                    // if the shader doesn't actually write to it.
-                    texture_cache.MarkColorBufferInUse(index);
-                }
-
-                fbkey.color_attachments[index] =
-                    GL_COLOR_ATTACHMENT0 + regs.rt_control.GetMap(index);
-                fbkey.colors[index] = color_surface;
-            }
-            fbkey.is_single_buffer = false;
-            fbkey.colors_count = regs.rt_control.count;
+        if (color_surface) {
+            // Assume that a surface will be written to if it is used as a framebuffer, even
+            // if the shader doesn't actually write to it.
+            texture_cache.MarkColorBufferInUse(index);
         }
-    } else {
-        // No color attachments are enabled - leave them as zero
-        fbkey.is_single_buffer = true;
+
+        fbkey.color_attachments[index] = GL_COLOR_ATTACHMENT0 + regs.rt_control.GetMap(index);
+        fbkey.colors[index] = std::move(color_surface);
     }
+    fbkey.colors_count = regs.rt_control.count;
 
     if (depth_surface) {
         // Assume that a surface will be written to if it is used as a framebuffer, even if
         // the shader doesn't actually write to it.
         texture_cache.MarkDepthBufferInUse();
 
-        fbkey.zeta = depth_surface;
         fbkey.stencil_enable = depth_surface->GetSurfaceParams().type == SurfaceType::DepthStencil;
+        fbkey.zeta = std::move(depth_surface);
     }
 
     texture_cache.GuardRenderTargets(false);
 
-    current_state.draw.draw_framebuffer = framebuffer_cache.GetFramebuffer(fbkey);
-    SyncViewport(current_state);
-
-    return current_depth_stencil_usage = {static_cast<bool>(depth_surface), fbkey.stencil_enable};
+    state.draw.draw_framebuffer = framebuffer_cache.GetFramebuffer(fbkey);
+    SyncViewport(state);
 }
 
 void RasterizerOpenGL::ConfigureClearFramebuffer(OpenGLState& current_state, bool using_color_fb,
@@ -757,7 +709,7 @@ void RasterizerOpenGL::DrawArrays() {
     SetupShaders(params.primitive_mode);
     texture_cache.GuardSamplers(false);
 
-    ConfigureFramebuffers(state);
+    ConfigureFramebuffers();
 
     // Signal the buffer cache that we are not going to upload more things.
     const bool invalidate = buffer_cache.Unmap();

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -77,39 +77,8 @@ public:
                            const VideoCore::DiskResourceLoadCallback& callback) override;
 
 private:
-    struct FramebufferConfigState {
-        bool using_color_fb{};
-        bool using_depth_fb{};
-        bool preserve_contents{};
-        std::optional<std::size_t> single_color_target;
-
-        bool operator==(const FramebufferConfigState& rhs) const {
-            return std::tie(using_color_fb, using_depth_fb, preserve_contents,
-                            single_color_target) == std::tie(rhs.using_color_fb, rhs.using_depth_fb,
-                                                             rhs.preserve_contents,
-                                                             rhs.single_color_target);
-        }
-        bool operator!=(const FramebufferConfigState& rhs) const {
-            return !operator==(rhs);
-        }
-    };
-
-    /**
-     * Configures the color and depth framebuffer states.
-     *
-     * @param current_state       The current OpenGL state.
-     * @param using_color_fb      If true, configure color framebuffers.
-     * @param using_depth_fb      If true, configure the depth/stencil framebuffer.
-     * @param preserve_contents   If true, tries to preserve data from a previously used
-     *                            framebuffer.
-     * @param single_color_target Specifies if a single color buffer target should be used.
-     *
-     * @returns If depth (first) or stencil (second) are being stored in the bound zeta texture
-     *          (requires using_depth_fb to be true)
-     */
-    std::pair<bool, bool> ConfigureFramebuffers(
-        OpenGLState& current_state, bool using_color_fb = true, bool using_depth_fb = true,
-        bool preserve_contents = true, std::optional<std::size_t> single_color_target = {});
+    /// Configures the color and depth framebuffer states.
+    void ConfigureFramebuffers();
 
     void ConfigureClearFramebuffer(OpenGLState& current_state, bool using_color_fb,
                                    bool using_depth_fb, bool using_stencil_fb);
@@ -228,9 +197,6 @@ private:
              OGLVertexArray>
         vertex_array_cache;
 
-    FramebufferConfigState current_framebuffer_config_state;
-    std::pair<bool, bool> current_depth_stencil_usage{};
-
     static constexpr std::size_t STREAM_BUFFER_SIZE = 128 * 1024 * 1024;
     OGLBufferCache buffer_cache;