Preparations for a future DISTRHO_PLUGIN_WANT_WEBVIEW

Signed-off-by: falkTX <falktx@falktx.com>

Makefile.plugins.mk

@@ -250,6 +250,10 @@ HAVE_DGL   = false
 endif
 endif
 
+ifeq ($(HAVE_DGL)$(LINUX)$(USING_WEBVIEW),truetruetrue)
+DGL_LIB_SHARED = $(shell $(CC) -print-file-name=Scrt1.o)
+endif
+
 DGL_LIBS += $(DGL_SYSTEM_LIBS) -lm
 
 # TODO split dsp and ui object build flags
@@ -545,9 +549,9 @@ lv2_dsp: $(lv2_dsp)
 lv2_sep: $(lv2_dsp) $(lv2_ui)
 
 ifeq ($(HAVE_DGL),true)
-$(lv2): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_LV2.cpp.o $(BUILD_DIR)/DistrhoUIMain_LV2.cpp.o $(DGL_LIB)
+$(lv2): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_LV2.cpp.o $(BUILD_DIR)/DistrhoUIMain_LV2.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 else
-$(lv2): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_LV2.cpp.o
+$(lv2): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_LV2.cpp.o
 endif
 	-@mkdir -p $(shell dirname $@)
 	@echo "Creating LV2 plugin for $(NAME)"
@@ -558,7 +562,7 @@ $(lv2_dsp): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_LV2.cpp.o
 	@echo "Creating LV2 plugin library for $(NAME)"
 	$(SILENT)$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(EXTRA_LIBS) $(EXTRA_DSP_LIBS) $(SHARED) $(SYMBOLS_LV2DSP) -o $@
 
-$(lv2_ui): $(OBJS_UI) $(BUILD_DIR)/DistrhoUIMain_LV2.cpp.o $(DGL_LIB)
+$(lv2_ui): $(OBJS_UI) $(BUILD_DIR)/DistrhoUIMain_LV2.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 	-@mkdir -p $(shell dirname $@)
 	@echo "Creating LV2 plugin UI for $(NAME)"
 	$(SILENT)$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(EXTRA_LIBS) $(EXTRA_UI_LIBS) $(DGL_LIBS) $(SHARED) $(SYMBOLS_LV2UI) -o $@
@@ -663,7 +667,7 @@ modgui:
 vst2 vst: $(vst2) $(vst2files)
 
 ifeq ($(HAVE_DGL),true)
-$(vst2): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_VST2.cpp.o $(BUILD_DIR)/DistrhoUIMain_VST2.cpp.o $(DGL_LIB)
+$(vst2): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_VST2.cpp.o $(BUILD_DIR)/DistrhoUIMain_VST2.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 else
 $(vst2): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_VST2.cpp.o
 endif
@@ -677,7 +681,7 @@ endif
 vst3: $(vst3) $(vst3files)
 
 ifeq ($(HAVE_DGL),true)
-$(vst3): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_VST3.cpp.o $(BUILD_DIR)/DistrhoUIMain_VST3.cpp.o $(DGL_LIB)
+$(vst3): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_VST3.cpp.o $(BUILD_DIR)/DistrhoUIMain_VST3.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 else
 $(vst3): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_VST3.cpp.o
 endif
@@ -699,7 +703,7 @@ endif
 clap: $(clap) $(clapfiles)
 
 ifeq ($(HAVE_DGL),true)
-$(clap): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_CLAP.cpp.o $(BUILD_DIR)/DistrhoUIMain_CLAP.cpp.o $(DGL_LIB)
+$(clap): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_CLAP.cpp.o $(BUILD_DIR)/DistrhoUIMain_CLAP.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 else
 $(clap): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_CLAP.cpp.o
 endif
@@ -739,7 +743,7 @@ endif
 shared: $(shared)
 
 ifeq ($(HAVE_DGL),true)
-$(shared): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_SHARED.cpp.o $(BUILD_DIR)/DistrhoUIMain_SHARED.cpp.o $(DGL_LIB)
+$(shared): $(OBJS_DSP) $(OBJS_UI) $(BUILD_DIR)/DistrhoPluginMain_SHARED.cpp.o $(BUILD_DIR)/DistrhoUIMain_SHARED.cpp.o $(DGL_LIB) $(DGL_LIB_SHARED)
 else
 $(shared): $(OBJS_DSP) $(BUILD_DIR)/DistrhoPluginMain_SHARED.cpp.o
 endif

distrho/DistrhoUtils.hpp

@@ -366,13 +366,15 @@ int32_t d_roundToInt(const T& value)
 /** @} */
 
 /* --------------------------------------------------------------------------------------------------------------------
- * math functions */
+ * other stuff */
 
 #ifndef DONT_SET_USING_DISTRHO_NAMESPACE
-  // If your code uses a lot of DISTRHO classes, then this will obviously save you
-  // a lot of typing, but can be disabled by setting DONT_SET_USING_DISTRHO_NAMESPACE.
-  namespace DISTRHO_NAMESPACE {}
-  using namespace DISTRHO_NAMESPACE;
+/**
+   If your code uses a lot of DISTRHO classes, then this will obviously save you a lot of typing,
+   but can be disabled by setting DONT_SET_USING_DISTRHO_NAMESPACE.
+ */
+namespace DISTRHO_NAMESPACE {}
+using namespace DISTRHO_NAMESPACE;
 #endif
 
 #endif // DISTRHO_UTILS_HPP_INCLUDED

distrho/src/DistrhoPluginChecks.h

@@ -94,6 +94,10 @@
 # define DISTRHO_PLUGIN_WANT_TIMEPOS 0
 #endif
 
+#ifndef DISTRHO_PLUGIN_WANT_WEBVIEW
+# define DISTRHO_PLUGIN_WANT_WEBVIEW 0
+#endif
+
 #ifndef DISTRHO_UI_FILE_BROWSER
 # if defined(DGL_FILE_BROWSER_DISABLED) || DISTRHO_PLUGIN_HAS_EXTERNAL_UI
 #  define DISTRHO_UI_FILE_BROWSER 0
@@ -257,6 +261,17 @@ static_assert(sizeof(STRINGIFY(DISTRHO_PLUGIN_UNIQUE_ID)) == 5, "The macro DISTR
 # error DISTRHO_UI_IS_STANDALONE must not be defined
 #endif
 
+#ifdef DPF_USING_LD_LINUX_WEBVIEW
+# error DPF_USING_LD_LINUX_WEBVIEW must not be defined
+#endif
+
+// --------------------------------------------------------------------------------------------------------------------
+// Set DPF_USING_LD_LINUX_WEBVIEW for internal use
+
+#if DISTRHO_PLUGIN_WANT_WEBVIEW && defined(__linux__)
+# define DPF_USING_LD_LINUX_WEBVIEW
+#endif
+
 // --------------------------------------------------------------------------------------------------------------------
 
 #endif // DISTRHO_PLUGIN_CHECKS_H_INCLUDED

distrho/src/DistrhoPluginJACK.cpp

@@ -1,6 +1,6 @@
 /*
  * DISTRHO Plugin Framework (DPF)
- * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
+ * Copyright (C) 2012-2024 Filipe Coelho <falktx@falktx.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -86,6 +86,10 @@ static const writeMidiFunc writeMidiCallback = nullptr;
 static const requestParameterValueChangeFunc requestParameterValueChangeCallback = nullptr;
 #endif
 
+#ifdef DPF_USING_LD_LINUX_WEBVIEW
+int dpf_webview_start(int argc, char* argv[]);
+#endif
+
 // -----------------------------------------------------------------------
 
 static volatile bool gCloseSignalReceived = false;
@@ -996,6 +1000,11 @@ int main(int argc, char* argv[])
     }
    #endif
 
+   #ifdef DPF_USING_LD_LINUX_WEBVIEW
+    if (argc >= 2 && std::strcmp(argv[1], "dpf-ld-linux-webview") == 0)
+        return dpf_webview_start(argc - 1, argv + 1);
+   #endif
+
     if (argc == 2 && std::strcmp(argv[1], "selftest") == 0)
     {
        #ifdef DPF_RUNTIME_TESTING

distrho/src/DistrhoPluginVST2.cpp

@@ -1720,13 +1720,17 @@ const vst_effect* VSTPluginMain(const vst_host_callback audioMaster)
     return effect;
 }
 
-#if !(defined(DISTRHO_OS_MAC) || defined(DISTRHO_OS_WASM) || defined(DISTRHO_OS_WINDOWS))
+#if !(defined(DISTRHO_OS_MAC) || defined(DISTRHO_OS_WASM) || defined(DISTRHO_OS_WINDOWS) || DISTRHO_PLUGIN_WANT_WEBVIEW)
 DISTRHO_PLUGIN_EXPORT
 const vst_effect* VSTPluginMainCompat(vst_host_callback) asm ("main");
 
 DISTRHO_PLUGIN_EXPORT
 const vst_effect* VSTPluginMainCompat(const vst_host_callback audioMaster)
 {
+    // protect main symbol against running as executable
+    if (reinterpret_cast<uintptr_t>(audioMaster) < 0xff)
+        return nullptr;
+
     return VSTPluginMain(audioMaster);
 }
 #endif

distrho/src/DistrhoUIDSSI.cpp

@@ -38,6 +38,10 @@ static constexpr const setSizeFunc setSizeCallback = nullptr;
 // unsupported in DSSI
 static constexpr const fileRequestFunc fileRequestCallback = nullptr;
 
+#ifdef DPF_USING_LD_LINUX_WEBVIEW
+int dpf_webview_start(int argc, char* argv[]);
+#endif
+
 // --------------------------------------------------------------------------------------------------------------------
 
 
@@ -387,6 +391,11 @@ int main(int argc, char* argv[])
 {
     USE_NAMESPACE_DISTRHO
 
+   #ifdef DPF_USING_LD_LINUX_WEBVIEW
+    if (argc >= 2 && std::strcmp(argv[1], "dpf-ld-linux-webview") == 0)
+        return dpf_webview_start(argc - 1, argv + 1);
+   #endif
+
     // dummy test mode
     if (argc == 1)
     {

distrho/src/DistrhoUtils.cpp

@@ -49,7 +49,7 @@ BOOL WINAPI DllMain(HINSTANCE hInst, DWORD reason, LPVOID)
 
 START_NAMESPACE_DISTRHO
 
-// -----------------------------------------------------------------------
+// --------------------------------------------------------------------------------------------------------------------
 
 const char* getBinaryFilename()
 {
@@ -165,6 +165,18 @@ bool requestBufferSizeChange(uint) { return false; }
 bool requestMIDI() { return false; }
 #endif
 
-// -----------------------------------------------------------------------
+/* define webview start */
+#ifdef DPF_USING_LD_LINUX_WEBVIEW
+int dpf_webview_start(int argc, char* argv[]);
+#endif
+
+// --------------------------------------------------------------------------------------------------------------------
 
 END_NAMESPACE_DISTRHO
+
+#if defined(DPF_USING_LD_LINUX_WEBVIEW) && !DISTRHO_IS_STANDALONE
+int main(int argc, char* argv[])
+{
+    return DISTRHO_NAMESPACE::dpf_webview_start(argc, argv);
+}
+#endif