- Implemented EGL Context

source/platform/opengl/egl/context.cpp

@@ -0,0 +1,136 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+#include <fennec/lang/startup.h>
+#include <fennec/platform/interface/display.h>
+#include <fennec/platform/interface/platform.h>
+#include <fennec/platform/opengl/egl/context.h>
+
+namespace fennec
+{
+
+static gfxcontext* _create_egl_context(display* display) {
+	eglcontext* ctx = new eglcontext(display);
+	if (not ctx->connected()) {
+		delete ctx, ctx = nullptr;
+	}
+	return ctx;
+}
+
+STATIC_CONSTRUCTOR(_egl_init) {
+	platform::add_driver(_create_egl_context, 1);
+}
+
+eglcontext::eglcontext(display* display)
+	: gfxcontext(display, "EGL", this) {
+
+	const display::pixel_format& fmt = _display->get_color_format();
+
+	EGLint context_attrs[] = {
+#if FENNEC_GRAPHICS_OPENGL
+		EGL_CONTEXT_MAJOR_VERSION, 4,
+		EGL_CONTEXT_MINOR_VERSION, 3,
+#elif FENNEC_GRAPHICS_GLES3
+		EGL_CONTEXT_MAJOR_VERSION, 3,
+		EGL_CONTEXT_MINOR_VERSION, 2,
+#elif FENNEC_GRAPHICS_GLES2
+		EGL_CONTEXT_MAJOR_VERSION, 2,
+		EGL_CONTEXT_MINOR_VERSION, 0,
+#endif
+		EGL_NONE
+	};
+
+	EGLint config_attrs[] = {
+		EGL_SURFACE_TYPE,
+		EGL_WINDOW_BIT,
+		EGL_DEPTH_SIZE, fmt.depth,
+		EGL_RED_SIZE, fmt.r,
+		EGL_RED_SIZE, fmt.g,
+		EGL_RED_SIZE, fmt.b,
+		EGL_RENDERABLE_TYPE,
+
+#if FENNEC_GRAPHICS_OPENGL
+		EGL_OPENGL_BIT,
+#elif FENNEC_GRAPHICS_GLES3
+		EGL_OPENGL_ES3_BIT,
+#elif FENNEC_GRAPHICS_GLES2
+		EGL_OPENGL_ES2_BIT,
+#endif
+		EGL_NONE
+	};
+
+
+	_egldisplay = eglGetDisplay(_display->get_native_handle());
+	if (_egldisplay == nullptr) {
+		cleanup();
+		return;
+	}
+
+	if (not eglInitialize(_egldisplay, &_eglvmajor, &_eglvminor)) {
+		cleanup();
+		return;
+	}
+
+#if FENNEC_GRAPHICS_OPENGL
+	if (not eglBindAPI(EGL_OPENGL_API)) {
+#elif FENNEC_GRAPHICS_GLES3 or FENNEC_GRAPHICS_GLES2
+	if (not eglBindAPI(EGL_OPENGL_ES_API)) {
+#endif
+		cleanup();
+		return;
+	}
+
+	EGLint n;
+	if (not eglChooseConfig(_egldisplay, config_attrs, &_eglconfig, 1, &n)) {
+		cleanup();
+		return;
+	}
+
+	_eglcontext = eglCreateContext(_egldisplay, _eglconfig, EGL_NO_CONTEXT, context_attrs);
+	if (_eglcontext == nullptr) {
+		cleanup();
+		return;
+	}
+}
+
+eglcontext::~eglcontext() {
+	cleanup();
+}
+
+bool eglcontext::connected() {
+	return _eglcontext != nullptr;
+}
+
+void eglcontext::make_current(gfxsurface*) {
+
+}
+
+void eglcontext::cleanup() {
+	eglMakeCurrent(_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+	eglDestroyContext(_display, _eglcontext);
+	eglTerminate(_display);
+	eglReleaseThread();
+
+	_egldisplay = nullptr;
+	_eglconfig  = nullptr;
+	_eglcontext = nullptr;
+	_eglvmajor  = 0;
+	_eglvminor  = 0;
+}
+
+}