From 2b079485f6092051ebb7fec0e6210d6743926064 Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Thu, 24 Feb 2011 13:03:07 +0100 Subject: st/egl: Add a helper to perform a copy swap on a resource surface The copy swap can be used when we need to preserve the contents of the back buffer or when there is no way to do native page-flipping. Signed-off-by: Thomas Hellstrom --- .../state_trackers/egl/common/native_helper.c | 41 ++++++++++++++++++++++ .../state_trackers/egl/common/native_helper.h | 4 +++ 2 files changed, 45 insertions(+) (limited to 'src/gallium/state_trackers') diff --git a/src/gallium/state_trackers/egl/common/native_helper.c b/src/gallium/state_trackers/egl/common/native_helper.c index a9d8f32e00..0f00c4d13e 100644 --- a/src/gallium/state_trackers/egl/common/native_helper.c +++ b/src/gallium/state_trackers/egl/common/native_helper.c @@ -225,3 +225,44 @@ resource_surface_present(struct resource_surface *rsurf, return TRUE; } + +/** + * Schedule a copy swap from the back to the front buffer using the + * native display's copy context. + */ +boolean +resource_surface_copy_swap(struct resource_surface *rsurf, + struct native_display *ndpy) +{ + struct pipe_resource *ftex; + struct pipe_resource *btex; + struct pipe_context *pipe; + struct pipe_box src_box; + boolean ret = FALSE; + + pipe = ndpy_get_copy_context(ndpy); + if (!pipe) + return FALSE; + + ftex = resource_surface_get_single_resource(rsurf, + NATIVE_ATTACHMENT_FRONT_LEFT); + if (!ftex) + goto out_no_ftex; + btex = resource_surface_get_single_resource(rsurf, + NATIVE_ATTACHMENT_BACK_LEFT); + if (!btex) + goto out_no_btex; + + u_box_origin_2d(ftex->width0, ftex->height0, &src_box); + pipe->resource_copy_region(pipe, ftex, 0, 0, 0, 0, + btex, 0, &src_box); + pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL); + ret = TRUE; + + out_no_ftex: + pipe_resource_reference(&btex, NULL); + out_no_btex: + pipe_resource_reference(&ftex, NULL); + + return ret; +} diff --git a/src/gallium/state_trackers/egl/common/native_helper.h b/src/gallium/state_trackers/egl/common/native_helper.h index 03995de19a..ad6827336a 100644 --- a/src/gallium/state_trackers/egl/common/native_helper.h +++ b/src/gallium/state_trackers/egl/common/native_helper.h @@ -74,3 +74,7 @@ boolean resource_surface_present(struct resource_surface *rsurf, enum native_attachment which, void *winsys_drawable_handle); + +boolean +resource_surface_copy_swap(struct resource_surface *rsurf, + struct native_display *ndpy); -- cgit v1.2.3