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

2026-04-18 22:50:04 +02:00
1 parent 0348acb0eb
commit 6c8ef9ff44
@@ -0,0 +1,77 @@
+# compile_spirv.cmake
+# Compila shaders GLSL a SPIR-V i genera headers C++ embedibles.
+# Multiplataforma: Windows, macOS, Linux (no requereix bash ni xxd).
+#
+# Invocat per CMakeLists.txt amb:
+#   cmake -D GLSLC=<path> -D SHADERS_DIR=<path> -D HEADERS_DIR=<path> -P compile_spirv.cmake
+#
+# També es pot executar manualment des de l'arrel del projecte:
+#   cmake -D GLSLC=glslc -D SHADERS_DIR=data/shaders \
+#         -D HEADERS_DIR=source/core/rendering/sdl3gpu/spv \
+#         -P tools/shaders/compile_spirv.cmake
+
+cmake_minimum_required(VERSION 3.10)
+cmake_policy(SET CMP0007 NEW)
+
+# Llista de shaders a compilar: font relativa a SHADERS_DIR
+set(SHADER_SOURCES
+    "postfx.vert"
+    "postfx.frag"
+)
+
+# Nom de la variable C++ per a cada shader (mateix ordre)
+set(SHADER_VARS
+    "kpostfx_vert_spv"
+    "kpostfx_frag_spv"
+)
+
+list(LENGTH SHADER_SOURCES NUM_SHADERS)
+math(EXPR LAST_IDX "${NUM_SHADERS} - 1")
+
+foreach(IDX RANGE ${LAST_IDX})
+    list(GET SHADER_SOURCES ${IDX} SRC_NAME)
+    list(GET SHADER_VARS    ${IDX} VAR)
+
+    # Derivem el nom del header a partir de la variable: kpostfx_vert_spv → postfx_vert_spv.h
+    string(REGEX REPLACE "^k" "" HDR_BASE "${VAR}")
+    set(SRC "${SHADERS_DIR}/${SRC_NAME}")
+    set(SPV "${HEADERS_DIR}/${HDR_BASE}.spv")
+    set(HDR "${HEADERS_DIR}/${HDR_BASE}.h")
+
+    message(STATUS "Compilant ${SRC} ...")
+
+    execute_process(
+        COMMAND "${GLSLC}" "${SRC}" -o "${SPV}"
+        RESULT_VARIABLE GLSLC_RESULT
+        ERROR_VARIABLE  GLSLC_ERROR
+    )
+
+    if(NOT GLSLC_RESULT EQUAL 0)
+        message(FATAL_ERROR "glslc ha fallat per a ${SRC}:\n${GLSLC_ERROR}")
+    endif()
+
+    # Llegim el binari SPV com a hex (sense separadors) i el dividim en bytes.
+    file(READ "${SPV}" HEX_DATA HEX)
+    string(REGEX MATCHALL ".." BYTES "${HEX_DATA}")
+    list(LENGTH BYTES NUM_BYTES)
+
+    set(ARRAY_BODY "")
+    foreach(BYTE ${BYTES})
+        string(APPEND ARRAY_BODY "    0x${BYTE},\n")
+    endforeach()
+
+    file(WRITE "${HDR}"
+        "#pragma once\n"
+        "#include <cstddef>\n"
+        "#include <cstdint>\n"
+        "static const uint8_t ${VAR}[] = {\n"
+        "${ARRAY_BODY}"
+        "};\n"
+        "static const size_t ${VAR}_size = ${NUM_BYTES};\n"
+    )
+
+    file(REMOVE "${SPV}")
+    message(STATUS "  -> ${HDR} (${NUM_BYTES} bytes)")
+endforeach()
+
+message(STATUS "Shaders SPIR-V compilats correctament.")