From 38f7185be2ace3c8a04e20a1dff320ae233a28d9 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Fri, 11 Nov 2022 18:14:43 -0500
Subject: [PATCH] Draw the actual buffer text on screen

---
 backends/x/x.go | 57 +++++++++++++++++++++++++++++++++++--------------
 1 file changed, 41 insertions(+), 16 deletions(-)

diff --git a/backends/x/x.go b/backends/x/x.go
index 1a1037e..fc5be02 100644
--- a/backends/x/x.go
+++ b/backends/x/x.go
@@ -142,6 +142,9 @@ func (backend *Backend) handleXEvent (event xgb.Event) {
 		
 			// resize and rebind canvas
 			backend.reallocateCanvas()
+
+			// notify application of resize
+			backend.channel <- stone.EventResize { }
 		}
 	}
 }
@@ -201,28 +204,50 @@ func (backend *Backend) reallocateCanvas () {
 		return backend.colors[stone.ColorApplication]
 	})
 	
-	backend.drawRune(0, 0, 'T')
-	backend.drawRune(1, 0, 'h')
-	backend.drawRune(2, 0, 'e')
-	backend.drawRune(4, 0, 'q')
-	backend.drawRune(5, 0, 'u')
-	backend.drawRune(6, 0, 'i')
-	backend.drawRune(7, 0, 'c')
-	backend.drawRune(8, 0, 'k')
-	backend.drawRune(0, 1, 'b')
-	backend.drawRune(1, 1, 'r')
-	backend.drawRune(2, 1, 'o')
-	backend.drawRune(3, 1, 'w')
-	backend.drawRune(4, 1, 'n')
-	backend.drawRune(6, 1, 'f')
-	backend.drawRune(7, 1, 'o')
-	backend.drawRune(8, 1, 'x')
+	// backend.drawRune(0, 0, 'T')
+	// backend.drawRune(1, 0, 'h')
+	// backend.drawRune(2, 0, 'e')
+	// backend.drawRune(4, 0, 'q')
+	// backend.drawRune(5, 0, 'u')
+	// backend.drawRune(6, 0, 'i')
+	// backend.drawRune(7, 0, 'c')
+	// backend.drawRune(8, 0, 'k')
+	// backend.drawRune(0, 1, 'b')
+	// backend.drawRune(1, 1, 'r')
+	// backend.drawRune(2, 1, 'o')
+	// backend.drawRune(3, 1, 'w')
+	// backend.drawRune(4, 1, 'n')
+	// backend.drawRune(6, 1, 'f')
+	// backend.drawRune(7, 1, 'o')
+	// backend.drawRune(8, 1, 'x')
+
+	backend.drawCells(true)
 	
 	backend.canvas.XSurfaceSet(backend.window.Id)
 	backend.canvas.XDraw()
 	backend.canvas.XPaint(backend.window.Id)
 }
 
+func (backend *Backend) drawCells (forceRedraw bool) (areas []image.Rectangle) {
+	width, height := backend.application.Size()
+	for y := 0; y < height; y ++ {
+	for x := 0; x < width;  x ++ {
+		if !forceRedraw && backend.application.Clean(x, y) { continue }
+		backend.application.MarkClean(x, y)
+
+		cell := backend.application.Cell(x, y)
+		content := cell.Rune()
+		if content < 32 { continue }
+		
+		backend.drawRune(x, y, content)
+	}}
+	return
+}
+
+func (backend *Backend) updateWindowAreas (areas ...image.Rectangle) {
+	backend.canvas.XPaintRects(backend.window.Id, areas...)
+}
+
 func (backend *Backend) drawRune (x, y int, character rune) {
 	// TODO: cache these draws as non-transparent buffers with the
 	// application background color as the background. that way, we won't