gl-renderer: don't flip outputs for FBO rendering
The GL renderer uses the bottom left corner as origin. Therefore, the buffers must be flipped when using ReadPixels to have a image in the correct orientation for screenshots. If the rendered buffers are directly passed to a different application without going through ReadPixels, the rendered buffer appears upside down. Flip the rendered image in the FBO to fix the orientation when directly using the rendered buffer. Update read_pixels to not flip the image in these cases. Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
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@ -4079,7 +4079,7 @@ gl_renderer_output_create(struct weston_output *output,
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return -1;
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go->egl_surface = surface;
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go->y_flip = -1.0f;
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go->y_flip = surface == EGL_NO_SURFACE ? 1.0f : -1.0f;
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if (gr->has_disjoint_timer_query)
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gr->gen_queries(1, &go->render_query);
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