From a51a8bbe15114abe6accf1c0f63f9fcb2b97767e Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 12 Dec 2015 13:26:33 +0200
Subject: [PATCH] Some more refactoring

---
 source/main.c | 77 ++++++++++++++++++++++++++-------------------------
 1 file changed, 40 insertions(+), 37 deletions(-)

diff --git a/source/main.c b/source/main.c
index f4704ae..c0bbe0e 100644
--- a/source/main.c
+++ b/source/main.c
@@ -567,11 +567,10 @@ void mark_dirty(Compositor *compositor, CompositedScreen *screen)
 
 void process_create_window_event(Compositor *compositor, XCreateWindowEvent *event)
 {
-	CompositedScreen *screen = find_screen_by_root(compositor, event->parent);
-	if(!screen)
-		return;
+	CompositedScreen *screen;
 
-	add_window(compositor, screen, event->window);
+	if((screen = find_screen_by_root(compositor, event->parent)))
+		add_window(compositor, screen, event->window);
 }
 
 void process_destroy_window_event(Compositor *compositor, XDestroyWindowEvent *event)
@@ -579,13 +578,9 @@ void process_destroy_window_event(Compositor *compositor, XDestroyWindowEvent *e
 	CompositedScreen *screen;
 	CompositedWindow *window;
 
-	screen = find_screen_by_root(compositor, event->event);
-	if(!screen)
-		return;
-
-	window = find_window(screen, event->window);
-	if(window)
-		remove_window(compositor, screen, window, 1);
+	if((screen = find_screen_by_root(compositor, event->event)))
+		if((window = find_window(screen, event->window)))
+			remove_window(compositor, screen, window, 1);
 }
 
 void process_map_event(Compositor *compositor, XMapEvent *event)
@@ -730,39 +725,47 @@ int process_event(Compositor *compositor)
 	return 1;
 }
 
-void refresh_screens(Compositor *compositor)
+void refresh_screen(Compositor *compositor, CompositedScreen *screen)
 {
-	unsigned i, j;
+	unsigned i;
 
-	for(i=0; i<compositor->nscreens; ++i)
+	use_gl(compositor, screen);
+
+	glClearColor(0.5f, 0.5f, 0.5f, 0.0f);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glUseProgram(screen->program);
+	glBindVertexArray(screen->vertex_array);
+	for(i=0; i<screen->nwindows; ++i)
 	{
-		CompositedScreen *screen = &compositor->screens[i];
-		if(!screen->dirty)
+		CompositedWindow *window = &screen->windows[i];
+		if(window->map_state!=IsViewable)
 			continue;
 
-		use_gl(compositor, screen);
+		glBindTexture(GL_TEXTURE_2D, window->texture);
+		compositor->glXBindTexImageEXT(compositor->display, window->glx_pixmap, GLX_FRONT_LEFT_EXT, NULL);
+		glUniform4f(screen->geometry_loc,
+			(float)window->x/screen->width, (float)(screen->height-window->y-window->height)/screen->height,
+			(float)(window->width+2*window->border)/screen->width, (float)(window->height+2*window->border)/screen->height);
+		glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+		compositor->glXReleaseTexImageEXT(compositor->display, window->glx_pixmap, GLX_FRONT_LEFT_EXT);
+		XDamageSubtract(compositor->display, window->damage, None, None);
+	}
 
-		glClearColor(0.5f, 0.5f, 0.5f, 0.0f);
-		glClear(GL_COLOR_BUFFER_BIT);
+	glXSwapBuffers(compositor->display, screen->glx_window);
 
-		glUseProgram(screen->program);
-		glBindVertexArray(screen->vertex_array);
-		for(j=0; j<screen->nwindows; ++j)
-		{
-			CompositedWindow *window = &screen->windows[j];
-			if(window->map_state==IsViewable)
-			{
-				glBindTexture(GL_TEXTURE_2D, window->texture);
-				compositor->glXBindTexImageEXT(compositor->display, window->glx_pixmap, GLX_FRONT_LEFT_EXT, NULL);
-				glUniform4f(screen->geometry_loc, (float)window->x/screen->width, (float)(screen->height-window->y-window->height)/screen->height, (float)(window->width+2*window->border)/screen->width, (float)(window->height+2*window->border)/screen->height);
-				glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-				compositor->glXReleaseTexImageEXT(compositor->display, window->glx_pixmap, GLX_FRONT_LEFT_EXT);
-				XDamageSubtract(compositor->display, window->damage, None, None);
-			}
-		}
-		glXSwapBuffers(compositor->display, screen->glx_window);
+	screen->dirty = 0;
+}
+
+void refresh_all_screens(Compositor *compositor)
+{
+	unsigned i;
 
-		screen->dirty = 0;
+	for(i=0; i<compositor->nscreens; ++i)
+	{
+		CompositedScreen *screen = &compositor->screens[i];
+		if(screen->dirty)
+			refresh_screen(compositor, screen);
 	}
 
 	compositor->dirty = 0;
@@ -787,7 +790,7 @@ int main()
 	while(!terminate_requested)
 	{
 		if(!process_event(&compositor))
-			refresh_screens(&compositor);
+			refresh_all_screens(&compositor);
 	}
 
 	shutdown_compositor(&compositor);
-- 
2.45.2