From 6d46d9d554fe7189557825787dd920200b87ca80 Mon Sep 17 00:00:00 2001
From: Thomas Friedel <tomee6@gmail.com>
Date: Thu, 18 Apr 2019 14:46:20 +0200
Subject: [PATCH] removed the clipping reapplication after context switching
 since it didn't work properly

---
 backend/gogl/clip.go | 3 ---
 backend/gogl/gogl.go | 8 +-------
 2 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/backend/gogl/clip.go b/backend/gogl/clip.go
index f90558a..7da6254 100644
--- a/backend/gogl/clip.go
+++ b/backend/gogl/clip.go
@@ -7,7 +7,6 @@ import (
 )
 
 func (b *GoGLBackend) ClearClip() {
-	b.curClip = nil
 	b.activate()
 
 	gl.StencilMask(0xFF)
@@ -15,9 +14,7 @@ func (b *GoGLBackend) ClearClip() {
 }
 
 func (b *GoGLBackend) Clip(pts [][2]float64) {
-	b.curClip = nil
 	b.activate()
-	b.curClip = pts
 
 	b.ptsBuf = b.ptsBuf[:0]
 	b.ptsBuf = append(b.ptsBuf,
diff --git a/backend/gogl/gogl.go b/backend/gogl/gogl.go
index 53ea60d..981452b 100644
--- a/backend/gogl/gogl.go
+++ b/backend/gogl/gogl.go
@@ -206,8 +206,6 @@ type GoGLBackend struct {
 
 	*GLContext
 
-	curClip [][2]float64
-
 	activateFn                 func()
 	disableTextureRenderTarget func()
 }
@@ -246,11 +244,7 @@ func New(x, y, w, h int, ctx *GLContext) (*GoGLBackend, error) {
 	b.activateFn = func() {
 		gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
 		gl.Viewport(int32(b.x), int32(b.y), int32(b.w), int32(b.h))
-		gl.Clear(gl.STENCIL_BUFFER_BIT)
-		if c := b.curClip; c != nil {
-			b.curClip = nil
-			b.Clip(c)
-		}
+		// todo reapply clipping since another application may have used the stencil buffer
 	}
 	b.disableTextureRenderTarget = func() {
 		gl.BindFramebuffer(gl.FRAMEBUFFER, 0)