GlobalInputs F1-F12 + Escape, Screen sense destruir finestra, escalat al GPU, presets i fons canvas (v0.11.0)

source/core/rendering/sdl3gpu/pipelines/crtpi_pipeline.cpp

@@ -3,6 +3,8 @@
 #include <cstring>
 #include <iostream>
 
+#include "core/rendering/sdl3gpu/viewport.hpp"
+
 #ifndef __APPLE__
 #include "core/rendering/sdl3gpu/spv/crtpi_frag_spv.h"
 #include "core/rendering/sdl3gpu/spv/postfx_vert_spv.h"
@@ -280,7 +282,10 @@ namespace Rendering {
         SDL_GPUTexture* scene,
         SDL_GPUSampler* sampler,
         int game_width,
-        int game_height) {
+        int game_height,
+        Defaults::ScalingMode scaling_mode,
+        std::uint32_t swapchain_w,
+        std::uint32_t swapchain_h) {
         if (pipeline_ == nullptr) { return; }
 
         SDL_GPUColorTargetInfo color_target{};
@@ -292,6 +297,11 @@ namespace Rendering {
         SDL_GPURenderPass* pass = SDL_BeginGPURenderPass(cmd, &color_target, 1, nullptr);
         if (pass == nullptr) { return; }
 
+        // Viewport per aplicar letterbox/integer/... sense modificar el
+        // triangle fullscreen; la resta del swapchain queda a clear_color.
+        const SDL_GPUViewport VP = computeViewport(scaling_mode, swapchain_w, swapchain_h, game_width, game_height);
+        SDL_SetGPUViewport(pass, &VP);
+
         SDL_BindGPUGraphicsPipeline(pass, pipeline_);
 
         SDL_GPUTextureSamplerBinding binding{};

source/core/rendering/sdl3gpu/pipelines/crtpi_pipeline.hpp

@@ -3,6 +3,8 @@
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_gpu.h>
 
+#include <cstdint>
+
 #include "core/rendering/shader_backend.hpp"
 
 // Uniforms del shader CRT-Pi. 4 × vec4 (64 bytes) per a alineament Metal/Vulkan.
@@ -56,7 +58,10 @@ namespace Rendering {
             SDL_GPUTexture* scene,
             SDL_GPUSampler* sampler,
             int game_width,
-            int game_height);
+            int game_height,
+            Defaults::ScalingMode scaling_mode,
+            std::uint32_t swapchain_w,
+            std::uint32_t swapchain_h);
 
        private:
         SDL_GPUDevice* device_{nullptr};