[vulkan, android] Add feature of post-processing shaders on Android (#4348)

Very self-explanatory; implementation of the feature for post-processing shaders for Android (at least for now); will allow users to enhance the graphic quality of video games based on the use of multiple shaders adjustable, presets and more, inspired on the PPSSPP implementation, this feature adds 22 customizable shaders (1 pass) that lives on the overlay of the screen, which means that aside of the capability to chain multiple shaders on the screen, this doesn't have depths (pixel/ depth z-buffer) so it ensures the performance with it's use. Few shaders were a faithful port from PPSSPP with their respective attribution on the shader headers for their respective owners; and there are adaptations from public references/ cinematographic (Anime4K) and the rest are my own addition.

_Special Credits:_

1.- PPSSPP Team for their contribution on the public references for shaders: Henrik Rydgard, ShadX, SimoneT, KillaMaaki and guest(r).
2.- Niklas Haas.
3.- bloc97.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4348
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/video_core/renderer_vulkan/present/layer.h b/src/video_core/renderer_vulkan/present/layer.h
index 4d75e86ba6..f290ba5bb4 100644
--- a/src/video_core/renderer_vulkan/present/layer.h
+++ b/src/video_core/renderer_vulkan/present/layer.h
@@ -15,6 +15,9 @@
 #include "video_core/renderer_vulkan/present/fsr.h"
 #include "video_core/renderer_vulkan/present/sgsr.h"
 #include "video_core/renderer_vulkan/present/fxaa.h"
+#ifdef HAS_RESHADE
+#include "video_core/renderer_vulkan/present/post_process.h"
+#endif
 #include "video_core/renderer_vulkan/present/smaa.h"
 
 namespace Layout {
@@ -66,6 +69,9 @@ private:
 
     void RefreshResources(const Device& device, const Tegra::FramebufferConfig& framebuffer);
     void SetAntiAliasPass(const Device& device);
+#ifdef HAS_RESHADE
+    void SetPostProcessPass(const Device& device);
+#endif
     void ReleaseRawImages();
 
     u64 CalculateBufferSize(const Tegra::FramebufferConfig& framebuffer) const;
@@ -95,6 +101,12 @@ private:
     Settings::AntiAliasing anti_alias_setting{};
     std::variant<std::monostate, FXAA, SMAA> anti_alias{};
     std::variant<std::monostate, SGSR, FSR> sr_filter{};
+#ifdef HAS_RESHADE
+    std::optional<PostProcessChain> post_process{};
+    u64 post_process_generation{};
+    bool post_process_enabled{};
+    VkExtent2D post_process_extent{};
+#endif
     std::vector<u64> resource_ticks{};
 };