Switch: Enable CRT shader

Author: carstene1ns

.github/workflows/build.yml

@@ -373,8 +373,8 @@ jobs:
       - name: Build
         run: |
           cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=$DEVKITPRO/cmake/Switch.cmake \
-            -DCMAKE_BUILD_TYPE=MinSizeRel -DBUILD_WITH_ALL=ON \
-            -DBUILD_WITH_PYTHON=OFF -DBUILD_WITH_YUE=OFF
+            -DCMAKE_BUILD_TYPE=MinSizeRel -DBUILD_WITH_ALL=ON -DBUILD_SDLGPU=ON \
+            -DBUILD_WITH_YUE=OFF
           cmake --build build --parallel
 
       - name: Deploy

cmake/sdl.cmake

@@ -94,7 +94,7 @@ set(SDLGPU_SRC
     ${SDLGPU_DIR}/externals/stb_image_write/stb_image_write.c
 )
 
-if(NOT ANDROID)
+if(NOT ANDROID AND NOT NINTENDO_SWITCH)
     list(APPEND SDLGPU_SRC
         ${SDLGPU_DIR}/renderer_GLES_1.c
         ${SDLGPU_DIR}/renderer_GLES_3.c
@@ -110,7 +110,7 @@ endif()
 
 add_library(sdlgpu STATIC ${SDLGPU_SRC})
 
-if(EMSCRIPTEN OR ANDROID)
+if(EMSCRIPTEN OR ANDROID OR NINTENDO_SWITCH)
     target_compile_definitions(sdlgpu PRIVATE GLEW_STATIC SDL_GPU_DISABLE_GLES_1 SDL_GPU_DISABLE_GLES_3 SDL_GPU_DISABLE_OPENGL)
 else()
     target_compile_definitions(sdlgpu PRIVATE GLEW_STATIC SDL_GPU_DISABLE_GLES SDL_GPU_DISABLE_OPENGL_3 SDL_GPU_DISABLE_OPENGL_4)
@@ -146,6 +146,12 @@ if(ANDROID)
     )
 endif()
 
+if(NINTENDO_SWITCH)
+    find_package(PkgConfig REQUIRED)
+    pkg_search_module(GLES2 glesv2 REQUIRED IMPORTED_TARGET)
+    target_link_libraries(sdlgpu PkgConfig::GLES2)
+endif()
+
 if(NOT EMSCRIPTEN)
     if(BUILD_STATIC)
         target_link_libraries(sdlgpu SDL2-static)

src/system/sdl/main.c

@@ -1511,7 +1511,7 @@ void tic_sys_preseed()
 static void loadCrtShader()
 {
     static const char VertextShader[] =
-#if !defined (EMSCRIPTEN)
+#if !defined (EMSCRIPTEN) && !defined(__SWITCH__)
         "#version 110"                                                              "\n"
 #endif
         "attribute vec3 gpu_Vertex;"                                                "\n"
@@ -1529,7 +1529,7 @@ static void loadCrtShader()
     ;
 
     static const char PixelShader[] =
-#if !defined (EMSCRIPTEN)
+#if !defined (EMSCRIPTEN) && !defined(__SWITCH__)
         "#version 110"                                                                      "\n"
 #else
         "precision highp float;"                                                            "\n"