From c651046e3f1a8744ae042d669e317ae6632af361 Mon Sep 17 00:00:00 2001
From: Marcel Hellkamp <marc@gsites.de>
Date: Thu, 29 Mar 2018 18:39:37 +0200
Subject: [PATCH] Added canvas_fill(rgba) and a 50% black fill bound to the 'c'
 key.

---
 pixelnuke/canvas.c    | 8 ++++++++
 pixelnuke/canvas.h    | 1 +
 pixelnuke/pixelnuke.c | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/pixelnuke/canvas.c b/pixelnuke/canvas.c
index a9535e8..68e0e1e 100644
--- a/pixelnuke/canvas.c
+++ b/pixelnuke/canvas.c
@@ -376,6 +376,14 @@ void canvas_set_px(unsigned int x, unsigned int y, uint32_t rgba) {
 	ptr[2] = b;
 }
 
+void canvas_fill(uint32_t rgba) {
+	CanvasLayer * layer = canvas_base;
+	for(int x=0; x<layer->size; x++)
+		for(int y=0; y<layer->size; y++)
+			canvas_set_px(x, y, rgba);
+}
+
+
 void canvas_get_px(unsigned int x, unsigned int y, uint32_t *rgba) {
 	CanvasLayer * layer = canvas_base;
 	GLubyte* ptr = canvas_offset(layer, x, y);
diff --git a/pixelnuke/canvas.h b/pixelnuke/canvas.h
index 826478a..8a0af57 100644
--- a/pixelnuke/canvas.h
+++ b/pixelnuke/canvas.h
@@ -15,6 +15,7 @@ void canvas_close();
 void canvas_fullscreen(int display);
 int canvas_get_display();
 
+void canvas_fill(uint32_t rgba);
 void canvas_set_px(unsigned int x, unsigned int y, uint32_t rgba);
 void canvas_get_px(unsigned int x, unsigned int y, uint32_t *rgba);
 
diff --git a/pixelnuke/pixelnuke.c b/pixelnuke/pixelnuke.c
index 6bb32f7..af6a5a6 100644
--- a/pixelnuke/pixelnuke.c
+++ b/pixelnuke/pixelnuke.c
@@ -114,6 +114,8 @@ void px_on_key(int key, int scancode, int mods) {
 			canvas_fullscreen(-1);
 	} else if (key == 301) { // F12
 		canvas_fullscreen(canvas_get_display() + 1);
+	} else if (key == 67) { // c
+		canvas_fill(0x00000088);
 	} else if (key == 81 || key == 256) { // q or ESC
 		canvas_close();
 	}