QNX: fix KHR image handling

Textures previously bound to KHR image sources cannot be reused/bound to
a newly created KHR image - at least not on QNX.

Ensure that a new texture is created before binding a new KHR image.

(cherry picked from commit 21dad3632dec5e5ea7c9d45bba927aba2b8e23ea)
Change-Id: I7bf8da631debcd44b8e42bd23bc5043372e3536f
Reviewed-by: Rafael Roquetto <rafael.roquetto@qt.io>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/multimedia/platform/qnx/common/windowgrabber.cpp b/src/multimedia/platform/qnx/common/windowgrabber.cpp
index e4c8c926d..77588a7a8 100644
--- a/src/multimedia/platform/qnx/common/windowgrabber.cpp
+++ b/src/multimedia/platform/qnx/common/windowgrabber.cpp
@@ -393,8 +393,12 @@ GLuint
 WindowGrabberImage::getTexture(screen_window_t window, const QSize &size)
 {
     if (size != m_size) {
-        if (!m_glTexture)
-            glGenTextures(1, &m_glTexture);
+        // create a brand new texture to be the KHR image sibling, as
+        // previously used textures cannot be reused with new KHR image
+        // sources - note that glDeleteTextures handles nullptr gracefully
+        glDeleteTextures(1, &m_glTexture);
+        glGenTextures(1, &m_glTexture);
+
         glBindTexture(GL_TEXTURE_2D, m_glTexture);
         if (m_eglImage) {
             glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, 0);