[PATCH 2/7] gl-renderer: Refactor gl_renderer_output_window_create()

[Miguel A. Vico]

In preparation for follow-on changes to support frame presentation
through EGLDevice+EGLOutput, this change refactors
gl_renderer_output_window_create() to separate out window surface
creation code from output common creation code.

Bonus: Fix EGLSurface leakage upon gl_renderer_setup() failure.

Signed-off-by: Miguel A Vico Moya <mvicomoya at nvidia.com>
Reviewed-by: Andy Ritger <aritger at nvidia.com>
---
 src/gl-renderer.c | 91 +++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 62 insertions(+), 29 deletions(-)

diff --git a/src/gl-renderer.c b/src/gl-renderer.c
index 0c55e0b..1d6d98c 100644
--- a/src/gl-renderer.c
+++ b/src/gl-renderer.c
@@ -1,6 +1,7 @@
 /*
  * Copyright © 2012 Intel Corporation
  * Copyright © 2015 Collabora, Ltd.
+ * Copyright © 2016 NVIDIA Corporation
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -2546,24 +2547,21 @@ gl_renderer_output_set_border(struct weston_output *output,
 static int
 gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface);
 
-static int
-gl_renderer_output_window_create(struct weston_output *output,
+static EGLSurface
+gl_renderer_create_window_surface(struct gl_renderer *gr,
 			  EGLNativeWindowType window_for_legacy,
 			  void *window_for_platform,
 			  const EGLint *config_attribs,
 			  const EGLint *visual_id,
 			  int n_ids)
 {
-	struct weston_compositor *ec = output->compositor;
-	struct gl_renderer *gr = get_renderer(ec);
-	struct gl_output_state *go;
+	EGLSurface egl_surface = EGL_NO_SURFACE;
 	EGLConfig egl_config;
-	int i;
 
 	if (egl_choose_config(gr, config_attribs, visual_id,
 			      n_ids, &egl_config) == -1) {
 		weston_log("failed to choose EGL config for output\n");
-		return -1;
+		return EGL_NO_SURFACE;
 	}
 
 	if (egl_config != gr->egl_config &&
@@ -2571,48 +2569,83 @@ gl_renderer_output_window_create(struct weston_output *output,
 		weston_log("attempted to use a different EGL config for an "
 			   "output but EGL_MESA_configless_context is not "
 			   "supported\n");
-		return -1;
+		return EGL_NO_SURFACE;
 	}
 
-	go = zalloc(sizeof *go);
-	if (go == NULL)
-		return -1;
+	log_egl_config_info(gr->egl_display, egl_config);
 
-	if (gr->create_platform_window) {
-		go->egl_surface =
-			gr->create_platform_window(gr->egl_display,
-						   egl_config,
-						   window_for_platform,
-						   NULL);
-	} else {
-		go->egl_surface =
-			eglCreateWindowSurface(gr->egl_display,
-					       egl_config,
-					       window_for_legacy, NULL);
-	}
+	if (gr->create_platform_window)
+		egl_surface = gr->create_platform_window(gr->egl_display,
+		                                         egl_config,
+		                                         window_for_platform,
+		                                         NULL);
+	else
+		egl_surface = eglCreateWindowSurface(gr->egl_display,
+		                                     egl_config,
+		                                     window_for_legacy, NULL);
+
+	return egl_surface;
+}
+
+static int
+gl_renderer_output_create(struct weston_output *output,
+                          EGLSurface surface)
+{
+	struct weston_compositor *ec = output->compositor;
+	struct gl_renderer *gr = get_renderer(ec);
+	struct gl_output_state *go;
+	int i;
 
-	if (go->egl_surface == EGL_NO_SURFACE) {
+	if (surface == EGL_NO_SURFACE) {
 		weston_log("failed to create egl surface\n");
-		free(go);
 		return -1;
 	}
 
 	if (gr->egl_context == NULL)
-		if (gl_renderer_setup(ec, go->egl_surface) < 0) {
-			free(go);
+		if (gl_renderer_setup(ec, surface) < 0) {
 			return -1;
 		}
 
+	go = zalloc(sizeof *go);
+	if (go == NULL)
+		return -1;
+
+	go->egl_surface = surface;
+
 	for (i = 0; i < BUFFER_DAMAGE_COUNT; i++)
 		pixman_region32_init(&go->buffer_damage[i]);
 
 	output->renderer_state = go;
 
-	log_egl_config_info(gr->egl_display, egl_config);
-
 	return 0;
 }
 
+static int
+gl_renderer_output_window_create(struct weston_output *output,
+                                 EGLNativeWindowType window_for_legacy,
+                                 void *window_for_platform,
+                                 const EGLint *config_attribs,
+                                 const EGLint *visual_id,
+                                 int n_ids)
+{
+	struct weston_compositor *ec = output->compositor;
+	struct gl_renderer *gr = get_renderer(ec);
+	EGLSurface egl_surface = EGL_NO_SURFACE;
+	int ret = 0;
+
+	egl_surface = gl_renderer_create_window_surface(gr,
+	                                                window_for_legacy,
+	                                                window_for_platform,
+	                                                config_attribs,
+	                                                visual_id, n_ids);
+
+	ret = gl_renderer_output_create(output, egl_surface);
+	if (ret < 0 && egl_surface != EGL_NO_SURFACE)
+		eglDestroySurface(gr->egl_display, egl_surface);
+
+	return ret;
+}
+
 static void
 gl_renderer_output_destroy(struct weston_output *output)
 {
-- 
2.7.1