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

source/core/rendering/sdl3gpu/sdl3gpu_shader.cpp

@@ -222,6 +222,13 @@ namespace Rendering {
             cleanup();
             return false;
         }
+        // El pipeline CrtPi es crea sempre — l'usuari pot alternar en calent
+        // via setActiveShader() sense tornar a init'ar la GPU.
+        crtpi_pipeline_ = std::make_unique<CrtPiPipeline>();
+        if (!crtpi_pipeline_->init(device_, window_)) {
+            cleanup();
+            return false;
+        }
 
         is_ready_ = true;
         return true;
@@ -361,6 +368,13 @@ namespace Rendering {
             return;
         }
 
+        // Camí CrtPi: delega tot el render pass al pipeline dedicat.
+        if (active_shader_ == ShaderType::CRTPI && crtpi_pipeline_ != nullptr) {
+            crtpi_pipeline_->render(cmd, swapchain, scene_texture_, sampler_, game_width_, game_height_);
+            SDL_SubmitGPUCommandBuffer(cmd);
+            return;
+        }
+
         uniforms_.time = static_cast<float>(SDL_GetTicks()) / 1000.0F;
 
         SDL_GPUColorTargetInfo color_target{};
@@ -386,6 +400,12 @@ namespace Rendering {
         SDL_SubmitGPUCommandBuffer(cmd);
     }
 
+    void SDL3GPUShader::setCrtPiParams(const CrtPiParams& params) {
+        if (crtpi_pipeline_ != nullptr) {
+            crtpi_pipeline_->setParams(params);
+        }
+    }
+
     void SDL3GPUShader::setPostFXParams(const PostFXParams& params) {
         uniforms_.vignette_strength = params.vignette;
         uniforms_.scanline_strength = params.scanlines;
@@ -430,6 +450,9 @@ namespace Rendering {
         if (device_ != nullptr) {
             SDL_WaitForGPUIdle(device_);
 
+            // El pipeline CrtPi ha d'alliberar-se mentre el device segueix viu.
+            crtpi_pipeline_.reset();
+
             if (pipeline_ != nullptr) {
                 SDL_ReleaseGPUGraphicsPipeline(device_, pipeline_);
                 pipeline_ = nullptr;