Moar shader decompiler (#559)

* Renderer: Add prepareForDraw callback

* Add fmt submodule and port shader decompiler instructions to it

* Add shader acceleration setting

* Hook up vertex shaders to shader cache

* Shader decompiler: Fix redundant compilations

* Shader Decompiler: Fix vertex attribute upload

* Shader compiler: Simplify generated code for reading and faster compilation

* Further simplify shader decompiler output

* Shader decompiler: More smallen-ing

* Shader decompiler: Get PICA uniforms uploaded to the GPU

* Shader decompiler: Readd clipping

* Shader decompiler: Actually `break` on control flow instructions

* Shader decompiler: More control flow handling

* Shader decompiler: Fix desitnation mask

* Shader Decomp: Remove pair member capture in lambda (unsupported on NDK)

* Disgusting changes to handle the fact that hw shader shaders are 2x as big

* Shader decompiler: Implement proper output semantic mapping

* Moar instructions

* Shader decompiler: Add FLR/SLT/SLTI/SGE/SGEI

* Shader decompiler: Add register indexing

* Shader decompiler: Optimize mova with both x and y masked

* Shader decompiler: Add DPH/DPHI

* Fix shader caching being broken

* PICA decompiler: Cache VS uniforms

* Simply vertex cache code

* Simplify vertex cache code

* Shader decompiler: Add loops

* Shader decompiler: Implement safe multiplication

* Shader decompiler: Implement LG2/EX2

* Shader decompiler: More control flow

* Shader decompiler: Fix JMPU condition

* Shader decompiler: Convert main function to void

* PICA: Start implementing GPU vertex fetch

* More hw VAO work

* More hw VAO work

* More GPU vertex fetch code

* Add GL Stream Buffer from Duckstation

* GL: Actually upload data to stream buffers

* GPU: Cleanup immediate mode handling

* Get first renders working with accelerated draws

* Shader decompiler: Fix control flow analysis bugs

* HW shaders: Accelerate indexed draws

* Shader decompiler: Add support for compilation errors

* GLSL decompiler: Fall back for LITP

* Add Renderdoc scope classes

* Fix control flow analysis bug

* HW shaders: Fix attribute fetch

* Rewriting hw vertex fetch

* Stream buffer: Fix copy-paste mistake

* HW shaders: Fix indexed rendering

* HW shaders: Add padding attributes

* HW shaders: Avoid redundant glVertexAttrib4f calls

* HW shaders: Fix loops

* HW shaders: Make generated shaders slightly smaller

* Fix libretro build

* HW shaders: Fix android

* Remove redundant ubershader checks

* Set accelerate shader default to true

* Shader decompiler: Don't declare VS input attributes as an array

* Change ubuntu-latest to Ubuntu 24.04 because Microsoft screwed up their CI again

* fix merge conflict bug

include/renderer.hpp

@@ -1,9 +1,10 @@
 #pragma once
 #include <array>
+#include <optional>
 #include <span>
 #include <string>
-#include <optional>
 
+#include "PICA/draw_acceleration.hpp"
 #include "PICA/pica_vertex.hpp"
 #include "PICA/regs.hpp"
 #include "helpers.hpp"
@@ -21,9 +22,11 @@ enum class RendererType : s8 {
 };
 
 struct EmulatorConfig;
-class GPU;
 struct SDL_Window;
 
+class GPU;
+class ShaderUnit;
+
 class Renderer {
   protected:
 	GPU& gpu;
@@ -77,7 +80,11 @@ class Renderer {
 	virtual std::string getUbershader() { return ""; }
 	virtual void setUbershader(const std::string& shader) {}
 
-	virtual void setUbershaderSetting(bool value) {}
+	// This function is called on every draw call before parsing vertex data.
+	// It is responsible for things like looking up which vertex/fragment shaders to use, recompiling them if they don't exist, choosing between
+	// ubershaders and shadergen, and so on.
+	// Returns whether this draw is eligible for using hardware-accelerated shaders or if shaders should run on the CPU
+	virtual bool prepareForDraw(ShaderUnit& shaderUnit, PICA::DrawAcceleration* accel) { return false; }
 
 	// Functions for initializing the graphics context for the Qt frontend, where we don't have the convenience of SDL_Window
 #ifdef PANDA3DS_FRONTEND_QT