Add start of drm engine

NB: Nothing to see here, just basic evas_engine setup.

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/modules/evas/engines/drm/evas_engine.c

@@ -0,0 +1,89 @@
+#include "evas_common.h"
+#include "evas_private.h"
+#include "Evas_Engine_Drm.h"
+#include "evas_engine.h"
+
+/* function tables - filled in later (func and parent func) */
+static Evas_Func func, pfunc;
+
+/* external variables */
+int _evas_engine_drm_log_dom;
+
+/* engine api functions */
+static void *
+eng_info(Evas *evas EINA_UNUSED)
+{
+   Evas_Engine_Info_Drm *info;
+
+   /* try to allocate space for our engine info structure */
+   if (!(info = calloc(1, sizeof(Evas_Engine_Info_Drm))))
+     return NULL;
+
+   /* set some engine default properties */
+   info->magic.magic = rand();
+   info->render_mode = EVAS_RENDER_MODE_BLOCKING;
+
+   return info;
+}
+
+static void 
+eng_info_free(Evas *evas EINA_UNUSED, void *einfo)
+{
+   Evas_Engine_Info_Drm *info;
+
+   /* free the engine info */
+   if ((info = (Evas_Engine_Info_Drm *)einfo))
+     free(info);
+}
+
+/* module api functions */
+static int
+module_open(Evas_Module *em)
+{
+   /* check for valid evas module */
+   if (!em) return 0;
+
+   /* try to inherit functions from software_generic engine */
+   if (!_evas_module_engine_inherit(&pfunc, "software_generic")) return 0;
+
+   /* try to create eina logging domain */
+   _evas_engine_drm_log_dom = 
+     eina_log_domain_register("evas-drm", EVAS_DEFAULT_LOG_COLOR);
+
+   /* if we could not create a logging domain, error out */
+   if (_evas_engine_drm_log_dom < 0)
+     {
+        EINA_LOG_ERR("Can not create a module log domain.");
+        return 0;
+     }
+
+   /* store parent functions */
+   func = pfunc;
+
+   /* override the methods we provide */
+   EVAS_API_OVERRIDE(info, &func, eng_);
+   EVAS_API_OVERRIDE(info_free, &func, eng_);
+
+   /* advertise our engine functions */
+   em->functions = (void *)(&func);
+
+   return 1;
+}
+
+static void 
+module_close(Evas_Module *em EINA_UNUSED)
+{
+   /* unregister the eina log domain for this engine */
+   eina_log_domain_unregister(_evas_engine_drm_log_dom);
+}
+
+static Evas_Module_Api evas_modapi =
+{
+   EVAS_MODULE_API_VERSION, "drm", "none", { module_open, module_close }
+};
+
+EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_ENGINE, engine, drm);
+
+#ifndef EVAS_STATIC_BUILD_DRM
+EVAS_EINA_MODULE_DEFINE(engine, drm);
+#endif