Shader CRT-Pi alternatiu en pipeline separat; selecció via config + presets (v0.6.0)

source/core/rendering/sdl3gpu/sdl3gpu_shader.hpp

@@ -4,8 +4,10 @@
 #include <SDL3/SDL_gpu.h>
 
 #include <cstdint>
+#include <memory>
 #include <string>
 
+#include "core/rendering/sdl3gpu/pipelines/crtpi_pipeline.hpp"
 #include "core/rendering/shader_backend.hpp"
 
 // Uniforms enviats al fragment stage cada frame.
@@ -48,6 +50,8 @@ namespace Rendering {
         void uploadPixels(const std::uint32_t* pixels, int width, int height) override;
         void render() override;
         void setPostFXParams(const PostFXParams& params) override;
+        void setActiveShader(ShaderType type) override { active_shader_ = type; }
+        void setCrtPiParams(const CrtPiParams& params) override;
         void setVSync(bool vsync) override;
         void setPreferredDriver(const std::string& driver) override { preferred_driver_ = driver; }
         void cleanup() override;
@@ -75,6 +79,8 @@ namespace Rendering {
         SDL_GPUTexture* scene_texture_{nullptr};
         SDL_GPUTransferBuffer* upload_buffer_{nullptr};
         SDL_GPUSampler* sampler_{nullptr};
+        std::unique_ptr<CrtPiPipeline> crtpi_pipeline_;
+        ShaderType active_shader_{ShaderType::POSTFX};
 
         PostFXUniforms uniforms_{
             .vignette_strength = 0.0F,