From fb32b2955d735a98cae976b30e079386647703d5 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Wed, 24 Mar 2010 02:46:11 -0400
Subject: New dmnsn_clear_canvas() function.

Makes valgrind happier about the GL test.
---
 libdimension/canvas.c           | 13 +++++++++++++
 libdimension/dimension/canvas.h |  1 +
 tests/libdimension/gl.c         |  2 ++
 3 files changed, 16 insertions(+)

diff --git a/libdimension/canvas.c b/libdimension/canvas.c
index 2d0df2e..14bc156 100644
--- a/libdimension/canvas.c
+++ b/libdimension/canvas.c
@@ -95,3 +95,16 @@ dmnsn_set_pixel(dmnsn_canvas *canvas, unsigned int x, unsigned int y,
     (*optimizer.optimizer_fn)(canvas, optimizer, x, y);
   }
 }
+
+/* Fill a canvas with a solid color */
+void
+dmnsn_clear_canvas(dmnsn_canvas *canvas, dmnsn_color color)
+{
+  unsigned int x;
+  for (x = 0; x < canvas->x; ++x) {
+    unsigned int y;
+    for (y = 0; y < canvas->y; ++y) {
+      dmnsn_set_pixel(canvas, x, y, color);
+    }
+  }
+}
diff --git a/libdimension/dimension/canvas.h b/libdimension/dimension/canvas.h
index 67b88df..306b55c 100644
--- a/libdimension/dimension/canvas.h
+++ b/libdimension/dimension/canvas.h
@@ -75,5 +75,6 @@ dmnsn_get_pixel(const dmnsn_canvas *canvas, unsigned int x, unsigned int y)
 
 void dmnsn_set_pixel(dmnsn_canvas *canvas, unsigned int x, unsigned int y,
                      dmnsn_color color);
+void dmnsn_clear_canvas(dmnsn_canvas *canvas, dmnsn_color color);
 
 #endif /* DIMENSION_CANVAS_H */
diff --git a/tests/libdimension/gl.c b/tests/libdimension/gl.c
index 24a8ccd..00f9819 100644
--- a/tests/libdimension/gl.c
+++ b/tests/libdimension/gl.c
@@ -45,6 +45,8 @@ main() {
     return EXIT_FAILURE;
   }
 
+  dmnsn_clear_canvas(scene->canvas, dmnsn_black);
+
   /* Create a new glX display */
   display = dmnsn_new_display(scene->canvas);
   if (!display) {
-- 
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