[opengl] remove GLAD symbols from builds w/o OpenGL (#3922)

removes unused symbols from non-OpenGL builds, notably mac

I REMEMBER MAKING THIS PR A WHILE AGO but I have no record of it here, so hell lets redo it

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3922
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/video_core/CMakeLists.txt

@@ -323,7 +323,10 @@ if (ENABLE_OPENGL)
 endif()
 
 target_link_libraries(video_core PUBLIC common core)
-target_link_libraries(video_core PUBLIC glad shader_recompiler stb bc_decoder gpu_logging)
+target_link_libraries(video_core PUBLIC shader_recompiler stb bc_decoder gpu_logging)
+if (ENABLE_OPENGL)
+    target_link_libraries(video_core PUBLIC glad)
+endif()
 
 if (YUZU_USE_EXTERNAL_FFMPEG)
     add_dependencies(video_core ffmpeg-build)

src/yuzu/CMakeLists.txt

@@ -411,8 +411,11 @@ endif()
 
 target_link_libraries(yuzu PRIVATE nlohmann_json::nlohmann_json)
 target_link_libraries(yuzu PRIVATE common core input_common frontend_common network video_core qt_common)
-target_link_libraries(yuzu PRIVATE Boost::headers glad Qt6::Widgets Qt6::Charts Qt6::Concurrent)
+target_link_libraries(yuzu PRIVATE Boost::headers Qt6::Widgets Qt6::Charts Qt6::Concurrent)
 target_link_libraries(yuzu PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads)
+if (ENABLE_OPENGL)
+    target_link_libraries(yuzu PRIVATE glad)
+endif()
 
 if (UNIX AND NOT APPLE)
     target_link_libraries(yuzu PRIVATE Qt6::DBus)

src/yuzu/bootmanager.cpp

@@ -8,7 +8,10 @@
 #include <string>
 #include <tuple>
 #include <type_traits>
+
+#ifdef HAS_OPENGL
 #include <glad/glad.h>
+#endif
 
 #include <QtCore/qglobal.h>
 #include "common/settings_enums.h"
@@ -1039,11 +1042,12 @@ void GRenderWindow::InitializeNull() {
 }
 
 bool GRenderWindow::LoadOpenGL() {
+#ifdef HAS_OPENGL
     auto context = CreateSharedContext();
     auto scope = context->Acquire();
     if (!gladLoadGL()) {
-        QMessageBox::warning(
-            this, tr("Error while initializing OpenGL!"),
+        QtCommon::Frontend::Warning(
+            tr("Error while initializing OpenGL!"),
             tr("Your GPU may not support OpenGL, or you do not have the latest graphics driver."));
         return false;
     }
@@ -1052,15 +1056,16 @@ bool GRenderWindow::LoadOpenGL() {
     const QString renderer =
         QString::fromUtf8(reinterpret_cast<const char*>(glGetString(GL_RENDERER)));
     if (!GLAD_GL_VERSION_4_6) {
-        QMessageBox::warning(this, tr("Error while initializing OpenGL 4.6!"),
-                             tr("Your GPU may not support OpenGL 4.6, or you do not have the "
-                                "latest graphics driver.<br><br>GL Renderer:<br>%1")
-                                 .arg(renderer));
+        QtCommon::Frontend::Warning(
+            tr("Error while initializing OpenGL 4.6!"),
+            tr("Your GPU may not support OpenGL 4.6, or you do not have the "
+            "latest graphics driver.<br><br>GL Renderer:<br>%1")
+                .arg(renderer));
         return false;
     }
     if (QStringList missing_ext = GetUnsupportedGLExtensions(); !missing_ext.empty()) {
-        QMessageBox::warning(
-            this, tr("Error while initializing OpenGL!"),
+        QtCommon::Frontend::Warning(
+            tr("Error while initializing OpenGL!"),
             tr("Your GPU may not support one or more required OpenGL extensions. Please ensure you "
                "have the latest graphics driver.<br><br>GL Renderer:<br>%1<br><br>Unsupported "
                "extensions:<br>%2")
@@ -1069,10 +1074,17 @@ bool GRenderWindow::LoadOpenGL() {
         // Non fatal
     }
     return true;
+#else
+    QtCommon::Frontend::Warning(
+        tr("Error while initializing OpenGL!"),
+        tr("This build doesn't have OpenGL support."));
+    return false;
+#endif
 }
 
 QStringList GRenderWindow::GetUnsupportedGLExtensions() const {
-    QStringList missing_ext;
+    QStringList missing_ext{};
+#ifdef HAS_OPENGL
     // Extensions required to support some texture formats.
     if (!GLAD_GL_EXT_texture_compression_s3tc)
         missing_ext.append(QStringLiteral("EXT_texture_compression_s3tc"));
@@ -1082,6 +1094,7 @@ QStringList GRenderWindow::GetUnsupportedGLExtensions() const {
         LOG_ERROR(Frontend, "GPU does not support all required extensions");
     for (const QString& ext : missing_ext)
         LOG_ERROR(Frontend, "Unsupported GL extension: {}", ext.toStdString());
+#endif
     return missing_ext;
 }
 

src/yuzu_cmd/CMakeLists.txt

@@ -15,11 +15,18 @@ function(create_resource file output filename)
     file(WRITE "${PROJECT_BINARY_DIR}/dist/${output}" "const unsigned char ${filename}[] = {${filedata}};\nconst unsigned ${filename}_size = sizeof(${filename});\n")
 endfunction()
 
+if (ENABLE_OPENGL)
+    list(APPEND OPENGL_SOURCES
+        emu_window/emu_window_sdl2_gl.cpp
+        emu_window/emu_window_sdl2_gl.h
+    )
+else()
+    set(OPENGL_SOURCES "")
+endif()
+
 add_executable(yuzu-cmd
     emu_window/emu_window_sdl2.cpp
     emu_window/emu_window_sdl2.h
-    emu_window/emu_window_sdl2_gl.cpp
-    emu_window/emu_window_sdl2_gl.h
     emu_window/emu_window_sdl2_null.cpp
     emu_window/emu_window_sdl2_null.h
     emu_window/emu_window_sdl2_vk.cpp
@@ -28,10 +35,13 @@ add_executable(yuzu-cmd
     sdl_config.h
     yuzu.cpp
     yuzu.rc
+    ${OPENGL_SOURCES}
 )
 
 target_link_libraries(yuzu-cmd PRIVATE common core input_common frontend_common video_core)
-target_link_libraries(yuzu-cmd PRIVATE glad)
+if (ENABLE_OPENGL)
+    target_link_libraries(yuzu-cmd PRIVATE glad)
+endif()
 if (MSVC)
     target_link_libraries(yuzu-cmd PRIVATE getopt)
 endif()

src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp

@@ -59,20 +59,16 @@ private:
 };
 
 bool EmuWindow_SDL2_GL::SupportsRequiredGLExtensions() {
-    std::vector<std::string_view> unsupported_ext;
-
+    std::vector<std::string_view> unsupported_ext{};
+#ifdef HAS_OPENGL
     // Extensions required to support some texture formats.
-    if (!GLAD_GL_EXT_texture_compression_s3tc) {
+    if (!GLAD_GL_EXT_texture_compression_s3tc)
         unsupported_ext.push_back("EXT_texture_compression_s3tc");
-    }
-    if (!GLAD_GL_ARB_texture_compression_rgtc) {
+    if (!GLAD_GL_ARB_texture_compression_rgtc)
         unsupported_ext.push_back("ARB_texture_compression_rgtc");
-    }
-
-    for (const auto& extension : unsupported_ext) {
+    for (const auto& extension : unsupported_ext)
         LOG_CRITICAL(Frontend, "Unsupported GL extension: {}", extension);
-    }
-
+#endif
     return unsupported_ext.empty();
 }
 

src/yuzu_cmd/yuzu.cpp

@@ -31,7 +31,9 @@
 #include "sdl_config.h"
 #include "video_core/renderer_base.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
+#ifdef HAS_OPENGL
 #include "yuzu_cmd/emu_window/emu_window_sdl2_gl.h"
+#endif
 #include "yuzu_cmd/emu_window/emu_window_sdl2_null.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2_vk.h"
 
@@ -349,17 +351,22 @@ int main(int argc, char** argv) {
 
     std::unique_ptr<EmuWindow_SDL2> emu_window;
     switch (Settings::values.renderer_backend.GetValue()) {
+#ifdef HAS_OPENGL
     case Settings::RendererBackend::OpenGL_GLSL:
     case Settings::RendererBackend::OpenGL_GLASM:
     case Settings::RendererBackend::OpenGL_SPIRV:
         emu_window = std::make_unique<EmuWindow_SDL2_GL>(&input_subsystem, system, fullscreen);
         break;
+#endif
     case Settings::RendererBackend::Vulkan:
         emu_window = std::make_unique<EmuWindow_SDL2_VK>(&input_subsystem, system, fullscreen);
         break;
     case Settings::RendererBackend::Null:
         emu_window = std::make_unique<EmuWindow_SDL2_Null>(&input_subsystem, system, fullscreen);
         break;
+    default:
+        LOG_CRITICAL(Frontend, "Invalid renderer backend");
+        return -1;
     }
 
 #ifdef _WIN32