texture_cache: Correct premature texceptions

Due to our current infrastructure, it is possible for a mipmap to be set 
on as a render target before a texception of that mipmap's superset be 
set afterwards. This is problematic as we rely on texture views to set 
up texceptions and protecting render targets targets for 3D texture 
rendering.

One simple solution is to configure framebuffers after texture setup but 
this brings other problems. This solution, forces a reconfiguration of 
the framebuffers after such event happens.

2 files changed, 15 insertions, 7 deletions

diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 63ee83391..3baf1522d 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -461,15 +461,15 @@ void RasterizerOpenGL::LoadDiskResources(const std::atomic_bool& stop_loading,
 }
 
 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) {
+    OpenGLState& current_state, bool must_reconfigure, bool using_color_fb, bool using_depth_fb,
+    bool preserve_contents, std::optional<std::size_t> single_color_target) {
     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 &&
+    if (!must_reconfigure && fb_config_state == current_framebuffer_config_state &&
         gpu.dirty_flags.color_buffer.none() && !gpu.dirty_flags.zeta_buffer) {
         // 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
@@ -622,8 +622,9 @@ void RasterizerOpenGL::Clear() {
         return;
     }
 
-    const auto [clear_depth, clear_stencil] = ConfigureFramebuffers(
-        clear_state, use_color, use_depth || use_stencil, false, regs.clear_buffers.RT.Value());
+    const auto [clear_depth, clear_stencil] =
+        ConfigureFramebuffers(clear_state, false, use_color, use_depth || use_stencil, false,
+                              regs.clear_buffers.RT.Value());
     if (regs.clear_flags.scissor) {
         SyncScissorTest(clear_state);
     }
@@ -705,6 +706,10 @@ void RasterizerOpenGL::DrawArrays() {
     DrawParameters params = SetupDraw();
     SetupShaders(params.primitive_mode);
 
+    if (texture_cache.ConsumeReconfigurationFlag()) {
+        ConfigureFramebuffers(state, true);
+    }
+
     buffer_cache.Unmap();
 
     shader_program_manager->ApplyTo(state);
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index d872e5110..970637efa 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -101,6 +101,8 @@ private:
 
     /**
      * Configures the color and depth framebuffer states.
+     * @param must_reconfigure If true, tells the framebuffer to skip the cache and reconfigure
+     * again. Used by the texture cache to solve texception conflicts
      * @param use_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.
@@ -109,8 +111,9 @@ private:
      * (requires using_depth_fb to be true)
      */
     std::pair<bool, bool> ConfigureFramebuffers(
-        OpenGLState& current_state, bool use_color_fb = true, bool using_depth_fb = true,
-        bool preserve_contents = true, std::optional<std::size_t> single_color_target = {});
+        OpenGLState& current_state, bool must_reconfigure = false, bool use_color_fb = true,
+        bool using_depth_fb = true, bool preserve_contents = true,
+        std::optional<std::size_t> single_color_target = {});
 
     /// Configures the current constbuffers to use for the draw command.
     void SetupDrawConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,