Commit 012350e3 authored by Olivier Fourdan's avatar Olivier Fourdan 🛠
Browse files

xwayland/eglstream: Set ALU to GXCopy for blitting

The EGLstream backend's post damage function uses a shader and
glDrawArrays() to copy the data from the glamor's pixmap texture prior
to do the eglSwapBuffers().

However, glDrawArrays() can be affected by the GL state, and therefore
not reliably produce the expected copy, causing the content of the
buffer to be corrupted.

Make sure to set the ALU to GXCopy prior to call glDrawArrays() to get
the expected result.
Signed-off-by: Olivier Fourdan's avatarOlivier Fourdan <>
Suggested-by: Michel Dänzer's avatarMichel Dänzer <>
parent d85bfa6a
......@@ -33,6 +33,7 @@
#define EGL_NO_X11
#include <glamor_egl.h>
#include <glamor.h>
#include <glamor_priv.h>
#include <glamor_transform.h>
#include <glamor_transfer.h>
......@@ -727,6 +728,8 @@ xwl_glamor_eglstream_post_damage(struct xwl_window *xwl_window,
* won't actually draw to it
glamor_set_alu(xwl_screen->screen, GXcopy);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
if (eglGetCurrentSurface(EGL_READ) != xwl_pixmap->surface ||
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