Bug fix: glfw's framebuffer might be lately changed after consuming some events

graphicscontext.go

@@ -66,10 +66,10 @@ func (c *graphicsContext) postUpdate() error {
 	}
 
 	scale := float64(c.screenScale)
-	option := &DrawImageOptions{
+	options := &DrawImageOptions{
 		GeometryMatrix: ScaleGeometry(scale, scale),
 	}
-	if err := c.defaultR.drawImage(c.screen, option); err != nil {
+	if err := c.defaultR.drawImage(c.screen, options); err != nil {
 		return err
 	}
 

internal/opengl/internal/shader/drawtexture.go

@@ -36,6 +36,7 @@ type Matrix interface {
 var initialized = false
 
 const size = 10000
+
 // TODO: Use unsafe.SizeOf?
 const uint16Size = 2
 const short32Size = 4
@@ -48,8 +49,8 @@ func DrawTexture(native gl.Texture, projectionMatrix [4][4]float64, quads []Text
 
 		vertexBuffer := gl.GenBuffer()
 		vertexBuffer.Bind(gl.ARRAY_BUFFER)
-		vertices := make([]float32, stride*size)
+		s := short32Size * stride * size
-		gl.BufferData(gl.ARRAY_BUFFER, short32Size*len(vertices), vertices, gl.DYNAMIC_DRAW)
+		gl.BufferData(gl.ARRAY_BUFFER, s, nil, gl.DYNAMIC_DRAW)
 
 		indexBuffer := gl.GenBuffer()
 		indexBuffer.Bind(gl.ELEMENT_ARRAY_BUFFER)

ui.go

@@ -78,6 +78,23 @@ func startUI(width, height, scale int, title string) error {
 	window.SetPosition(x, y)
 	window.Show()
 
+	ch := make(chan struct{})
+	window.SetFramebufferSizeCallback(func(w *glfw.Window, width, height int) {
+		close(ch)
+	})
+	for {
+		done := false
+		glfw.PollEvents()
+		select {
+		case <-ch:
+			done = true
+		default:
+		}
+		if done {
+			break
+		}
+	}
+
 	ui := currentUI
 	ui.scale = scale