starting merge

2026-01-11 15:33:34 +00:00 · 2025-03-22 03:43:35 +01:00
parent 35d1c0ff7f
commit 3e6aa18fbe
12 changed files with 245 additions and 84 deletions
--- a/Sources/Backends/OpenGL/EGL/EGLInstance.c
+++ b/Sources/Backends/OpenGL/EGL/EGLInstance.c
@@ -0,0 +1,107 @@
+// Copyright (C) 2025 kanel
+// This file is part of "Pulse"
+// For conditions of distribution and use, see copyright notice in LICENSE
+
+#include "EGLInstance.h"
+#include "../../../PulseInternal.h"
+
+static PulseLibModule egl_lib_module = PULSE_NULL_LIB_MODULE;
+static uint32_t loader_references_count = 0;
+
+static bool EGLLoadFunctions(EGLInstance* instance)
+{
+	#ifdef PULSE_PLAT_WINDOWS
+		const char* libnames[] = {
+			"libEGL.dll"
+		};
+	#else
+		const char* libnames[] = {
+			"libEGL.so.1",
+			"libEGL.so"
+		};
+	#endif
+
+
+	for(size_t i = 0; i < sizeof(libnames) / sizeof(const char*); i++)
+	{
+		if(loader_references_count == 0)
+			egl_lib_module = PulseLoadLibrary(libnames[i]);
+		if(egl_lib_module)
+		{
+			instance->eglGetProcAddress = (PFNEGLGETPROCADDRESSPROC)PulseLoadSymbolFromLibModule(egl_lib_module, "eglGetProcAddress");
+			if(instance->eglGetProcAddress == PULSE_NULLPTR)
+			{
+				PulseUnloadLibrary(egl_lib_module);
+				egl_lib_module = PULSE_NULL_LIB_MODULE;
+			}
+			else
+				break;
+		}
+	}
+	if(!egl_lib_module)
+	{
+		PulseSetInternalError(PULSE_ERROR_INITIALIZATION_FAILED);
+		return false;
+	}
+	loader_references_count++;
+
+	#define PULSE_EGL_FUNCTION(fn, T) \
+		instance->fn = (T)instance->eglGetProcAddress(#fn); \
+		if(!instance->fn) \
+			return false;
+		#include "EGLFunctions.h"
+	#undef PULSE_EGL_FUNCTION
+
+	return true;
+}
+
+bool EGLLoadInstance(EGLInstance* instance, bool es_context)
+{
+	PULSE_CHECK_PTR_RETVAL(instance, false);
+
+	if(!EGLLoadFunctions(instance))
+		return false;
+
+	instance->display = instance->eglGetDisplay(EGL_DEFAULT_DISPLAY);
+	PULSE_CHECK_PTR_RETVAL(instance->display, false);
+
+	instance->eglInitialize(instance->display, PULSE_NULLPTR, PULSE_NULLPTR);
+	EGLint attribs[] = {
+		EGL_RENDERABLE_TYPE, es_context ? EGL_OPENGL_ES3_BIT : EGL_OPENGL_BIT,
+		EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
+		EGL_NONE
+	};
+	EGLint num_configs;
+	instance->eglChooseConfig(instance->display, attribs, &instance->config, 1, &num_configs);
+	EGLint ctxAttribs[] = {
+		es_context ? EGL_CONTEXT_CLIENT_VERSION : EGL_CONTEXT_MAJOR_VERSION, 3,
+		EGL_NONE
+	};
+	instance->eglBindAPI(es_context ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
+	instance->context = instance->eglCreateContext(instance->display, instance->config, EGL_NO_CONTEXT, ctxAttribs);
+	PULSE_CHECK_PTR_RETVAL(instance->context, false);
+
+	EGLint pbufferAttribs[] = {
+		EGL_WIDTH, 1,
+		EGL_HEIGHT, 1,
+		EGL_NONE
+	};
+	instance->surface = instance->eglCreatePbufferSurface(instance->display, instance->config, pbufferAttribs);
+	PULSE_CHECK_PTR_RETVAL(instance->surface, false);
+
+	return instance->eglMakeCurrent(instance->display, instance->surface, instance->surface, instance->context);
+}
+
+void EGLUnloadInstance(EGLInstance* instance)
+{
+	PULSE_CHECK_PTR(instance);
+	instance->eglDestroySurface(instance->display, instance->surface);
+	instance->eglDestroyContext(instance->display, instance->context);
+	instance->eglTerminate(instance->display);
+
+	loader_references_count--;
+	if(loader_references_count != 0)
+		return;
+	PulseUnloadLibrary(egl_lib_module);
+	egl_lib_module = PULSE_NULL_LIB_MODULE;
+}