#4201 need to clear fbo before pasting over it

Xpra-org · Aug 13, 2024 · ae957f2 · ae957f2
1 parent 28f3c30
commit ae957f2
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/xpra/client/gl/gl_window_backing_base.py b/xpra/client/gl/gl_window_backing_base.py
@@ -748,8 +748,13 @@ def copy_fbo(self, w : int, h : int, sx : int=0, sy : int=0, dx : int=0, dy : in
 
         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, self.tmp_fbo)
         glBindTexture(target, self.textures[TEX_TMP_FBO])
-        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, target, self.textures[TEX_TMP_FBO], 0)
-        glDrawBuffer(GL_COLOR_ATTACHMENT1)
+        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, self.textures[TEX_TMP_FBO], 0)
+        glDrawBuffer(GL_COLOR_ATTACHMENT0)
+        if self._alpha_enabled:
+            glClearColor(0, 0, 0, 1)
+        else:
+            glClearColor(1, 1, 1, 0)
+        glClear(GL_COLOR_BUFFER_BIT)
 
         glBlitFramebuffer(sx, sy, sx+w, sy+h,
                           dx, dy, dx+w, dy+h,