more efficient clearing of gl frame buffer

approximately 8% performance improvement
JetSetIlly · Nov 23, 2024 · c32645f · c32645f
1 parent 6728d37
commit c32645f
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Showing 2 changed files with 2 additions and 10 deletions.
diff --git a/gui/sdlimgui/framebuffer/flip.go b/gui/sdlimgui/framebuffer/flip.go
@@ -134,10 +134,7 @@ func (fb *Flip) Process(draw func()) uint32 {
 	gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, id, 0)
 
 	if fb.clearOnRender {
-		gl.TexImage2D(gl.TEXTURE_2D, 0,
-			gl.RGBA, fb.width, fb.height, 0,
-			gl.RGBA, gl.UNSIGNED_BYTE,
-			gl.Ptr(fb.emptyPixels))
+		gl.Clear(gl.COLOR_BUFFER_BIT)
 	}
 
 	draw()

diff --git a/gui/sdlimgui/framebuffer/single.go b/gui/sdlimgui/framebuffer/single.go
@@ -121,14 +121,9 @@ func (fb *Single) Texture() uint32 {
 func (fb *Single) Process(draw func()) uint32 {
 	gl.BindTexture(gl.TEXTURE_2D, fb.texture)
 	gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fb.texture, 0)
-
 	if fb.clearOnRender {
-		gl.TexImage2D(gl.TEXTURE_2D, 0,
-			gl.RGBA, fb.width, fb.height, 0,
-			gl.RGBA, gl.UNSIGNED_BYTE,
-			gl.Ptr(fb.emptyPixels))
+		gl.Clear(gl.COLOR_BUFFER_BIT)
 	}
-
 	draw()
 
 	return fb.texture