Added Mir video target (thanks, Brandon!).

2025-10-16 06:45:59 +00:00 · 2014-02-02 23:41:46 -05:00
parent dce9b7b129
commit 19f8c6224f
21 changed files with 1648 additions and 0 deletions
--- a/src/video/mir/SDL_miropengl.c
+++ b/src/video/mir/SDL_miropengl.c
@@ -0,0 +1,122 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/*
+  Contributed by Brandon Schaefer, <brandon.schaefer@canonical.com>
+*/
+
+#include "SDL_config.h"
+#include "SDL_miropengl.h"
+
+#include <dlfcn.h>
+
+#define DEFAULT_OGL_ES2 "libGLESv2.so"
+
+void* MIR_GLHandle = NULL;
+
+void
+MIR_GL_SwapWindow(_THIS, SDL_Window* window)
+{
+    MIR_Window* mir_wind = window->driverdata;
+
+    SDL_EGL_SwapBuffers(_this, mir_wind->egl_surface);
+}
+
+int
+MIR_GL_MakeCurrent(_THIS, SDL_Window* window, SDL_GLContext context)
+{
+  if (window) {
+      EGLSurface egl_surface = ((MIR_Window*)window->driverdata)->egl_surface;
+      return SDL_EGL_MakeCurrent(_this, egl_surface, context);
+  }
+
+  return SDL_EGL_MakeCurrent(_this, NULL, NULL);
+}
+
+SDL_GLContext
+MIR_GL_CreateContext(_THIS, SDL_Window* window)
+{
+    MIR_Window* mir_window = window->driverdata;
+
+    SDL_GLContext context;
+    context = SDL_EGL_CreateContext(_this, mir_window->egl_surface);
+
+    return context;
+}
+
+int
+MIR_GL_LoadLibrary(_THIS, const char* path)
+{
+    MIR_Data* mir_data = _this->driverdata;
+
+    SDL_EGL_LoadLibrary(_this, path,
+                        mir_connection_get_egl_native_display(mir_data->connection));
+
+    SDL_EGL_ChooseConfig(_this);
+
+    return 0;
+}
+
+void
+MIR_GL_UnloadLibrary(_THIS)
+{
+    SDL_EGL_UnloadLibrary(_this);
+
+    if (MIR_GLHandle) {
+        dlclose(MIR_GLHandle);
+        MIR_GLHandle = NULL;
+    }
+}
+
+void
+Ensure_GL_HandleOpen()
+{
+    if (!MIR_GLHandle) {
+        MIR_GLHandle = dlopen(DEFAULT_OGL_ES2, RTLD_GLOBAL);
+        if (!MIR_GLHandle) {
+            SDL_SetError("Failed to dlopen library.");
+        }
+    }
+}
+
+void*
+MIR_GL_GetProcAddress(_THIS, const char* proc)
+{
+    void* proc_addr = eglGetProcAddress(proc);
+
+    /* FIXME when on the phone/tablet eglGetProcAddress returns NULL through libhybris,
+       seems to be a problem in android. Also looks like a problem in the android video driver:
+       src/video/android/SDL_androidgl.c
+
+       Workaround, to just get the address ourself
+    */
+
+    if (!proc_addr) {
+        Ensure_GL_HandleOpen();
+        proc_addr = dlsym(MIR_GLHandle, proc);
+    }
+
+    if (!proc_addr) {
+        SDL_SetError("Failed to find proc address!");
+    }
+
+    return proc_addr;
+}