Path SDL3 GPU amb PostFX passthrough; Screen amb init/shutdown explicit (v0.4.0)

CMakeLists.txt

@@ -39,6 +39,7 @@ set(APP_SOURCES
     source/core/rendering/sprite/sprite.cpp
     source/core/rendering/sprite/moving_sprite.cpp
     source/core/rendering/sprite/animated_sprite.cpp
+    source/core/rendering/sdl3gpu/sdl3gpu_shader.cpp
     source/core/resources/resource_helper.cpp
     source/core/resources/resource_cache.cpp
     source/utils/utils.cpp
@@ -49,8 +50,57 @@ set(APP_SOURCES
 
 find_package(SDL3 REQUIRED CONFIG REQUIRED COMPONENTS SDL3)
 
+# --- SHADER COMPILATION (Linux/Windows - macOS usa Metal inline) ---
+if(NOT APPLE)
+    find_program(GLSLC_EXE NAMES glslc)
+
+    set(SHADERS_DIR "${CMAKE_SOURCE_DIR}/data/shaders")
+    set(HEADERS_DIR "${CMAKE_SOURCE_DIR}/source/core/rendering/sdl3gpu/spv")
+
+    set(ALL_SHADER_SOURCES
+        "${SHADERS_DIR}/postfx.vert"
+        "${SHADERS_DIR}/postfx.frag"
+    )
+    set(ALL_SHADER_HEADERS
+        "${HEADERS_DIR}/postfx_vert_spv.h"
+        "${HEADERS_DIR}/postfx_frag_spv.h"
+    )
+
+    if(GLSLC_EXE)
+        add_custom_command(
+            OUTPUT  ${ALL_SHADER_HEADERS}
+            COMMAND ${CMAKE_COMMAND}
+                    -D GLSLC=${GLSLC_EXE}
+                    -D SHADERS_DIR=${SHADERS_DIR}
+                    -D HEADERS_DIR=${HEADERS_DIR}
+                    -P ${CMAKE_SOURCE_DIR}/tools/shaders/compile_spirv.cmake
+            DEPENDS ${ALL_SHADER_SOURCES}
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            COMMENT "Compilant shaders SPIR-V..."
+        )
+        add_custom_target(shaders DEPENDS ${ALL_SHADER_HEADERS})
+        message(STATUS "glslc trobat: els shaders es compilaran automaticament")
+    else()
+        # Dummy guards: sense glslc obligem que els headers pre-compilats existisquen.
+        foreach(HDR ${ALL_SHADER_HEADERS})
+            if(NOT EXISTS "${HDR}")
+                message(FATAL_ERROR
+                    "glslc no trobat i el header SPIR-V no existeix: ${HDR}\n"
+                    "  Instal·la glslc (Linux: sudo apt install glslang-tools) o\n"
+                    "  comprova que el fitxer pre-compilat existeix al repositori."
+                )
+            endif()
+        endforeach()
+        message(STATUS "glslc no trobat - usant headers SPIR-V pre-compilats")
+    endif()
+endif()
+
 add_executable(${PROJECT_NAME} ${APP_SOURCES})
 
+if(NOT APPLE AND GLSLC_EXE)
+    add_dependencies(${PROJECT_NAME} shaders)
+endif()
+
 target_include_directories(${PROJECT_NAME} PRIVATE
     "${CMAKE_SOURCE_DIR}/source"
     "${CMAKE_BINARY_DIR}"
@@ -140,6 +190,7 @@ if(CPPCHECK_EXE)
             --suppress=missingIncludeSystem
             --suppress=toomanyconfigs
             --suppress=*:*source/external/*
+            --suppress=*:*source/core/rendering/sdl3gpu/spv/*
             --suppress=normalCheckLevelMaxBranches
             -D_DEBUG
             -DLINUX_BUILD