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

tools/shaders/compile_spirv.cmake

@@ -17,12 +17,21 @@ cmake_policy(SET CMP0007 NEW)
 set(SHADER_SOURCES
     "postfx.vert"
     "postfx.frag"
+    "crtpi_frag.glsl"
 )
 
 # Nom de la variable C++ per a cada shader (mateix ordre)
 set(SHADER_VARS
     "kpostfx_vert_spv"
     "kpostfx_frag_spv"
+    "kcrtpi_frag_spv"
+)
+
+# Flags extra per a cada shader (vacío si cap)
+set(SHADER_FLAGS
+    ""
+    ""
+    "-fshader-stage=frag"
 )
 
 list(LENGTH SHADER_SOURCES NUM_SHADERS)
@@ -31,6 +40,7 @@ math(EXPR LAST_IDX "${NUM_SHADERS} - 1")
 foreach(IDX RANGE ${LAST_IDX})
     list(GET SHADER_SOURCES ${IDX} SRC_NAME)
     list(GET SHADER_VARS    ${IDX} VAR)
+    list(GET SHADER_FLAGS   ${IDX} EXTRA_FLAG)
 
     # Derivem el nom del header a partir de la variable: kpostfx_vert_spv → postfx_vert_spv.h
     string(REGEX REPLACE "^k" "" HDR_BASE "${VAR}")
@@ -40,11 +50,19 @@ foreach(IDX RANGE ${LAST_IDX})
 
     message(STATUS "Compilant ${SRC} ...")
 
-    execute_process(
-        COMMAND "${GLSLC}" "${SRC}" -o "${SPV}"
-        RESULT_VARIABLE GLSLC_RESULT
-        ERROR_VARIABLE  GLSLC_ERROR
-    )
+    if(EXTRA_FLAG)
+        execute_process(
+            COMMAND "${GLSLC}" "${EXTRA_FLAG}" "${SRC}" -o "${SPV}"
+            RESULT_VARIABLE GLSLC_RESULT
+            ERROR_VARIABLE  GLSLC_ERROR
+        )
+    else()
+        execute_process(
+            COMMAND "${GLSLC}" "${SRC}" -o "${SPV}"
+            RESULT_VARIABLE GLSLC_RESULT
+            ERROR_VARIABLE  GLSLC_ERROR
+        )
+    endif()
 
     if(NOT GLSLC_RESULT EQUAL 0)
         message(FATAL_ERROR "glslc ha fallat per a ${SRC}:\n${GLSLC_ERROR}")