From 043883647acaee0b2c67c1c6b496404ebb4e8d67 Mon Sep 17 00:00:00 2001 From: Charmaine Lee Date: Sat, 18 Feb 2017 01:26:52 -0800 Subject: [PATCH] st/wgl: flush with ST_FLUSH_WAIT before releasing shared contexts Before releasing a shared context, flush the context with ST_FLUSH_WAIT to make sure all commands are executed. This ensures that rendering to any shared resources is completed before they will be referenced by another context. Fixes an intermittent flickering with Photoshop. (VMware bug# 1779340) Reviewed-by: Brian Paul --- src/gallium/state_trackers/wgl/stw_context.c | 16 ++++++++++++++-- src/gallium/state_trackers/wgl/stw_context.h | 1 + 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/src/gallium/state_trackers/wgl/stw_context.c b/src/gallium/state_trackers/wgl/stw_context.c index b1e5f5e..85cffa6 100644 --- a/src/gallium/state_trackers/wgl/stw_context.c +++ b/src/gallium/state_trackers/wgl/stw_context.c @@ -104,8 +104,11 @@ DrvShareLists(DHGLRC dhglrc1, DHGLRC dhglrc2) ctx1 = stw_lookup_context_locked( dhglrc1 ); ctx2 = stw_lookup_context_locked( dhglrc2 ); - if (ctx1 && ctx2 && ctx2->st->share) + if (ctx1 && ctx2 && ctx2->st->share) { ret = ctx2->st->share(ctx2->st, ctx1->st); + ctx1->shared = TRUE; + ctx2->shared = TRUE; + } stw_unlock_contexts(stw_dev); @@ -175,6 +178,7 @@ stw_create_context_attribs(HDC hdc, INT iLayerPlane, DHGLRC hShareContext, if (hShareContext != 0) { stw_lock_contexts(stw_dev); shareCtx = stw_lookup_context_locked( hShareContext ); + shareCtx->shared = TRUE; stw_unlock_contexts(stw_dev); } @@ -184,6 +188,7 @@ stw_create_context_attribs(HDC hdc, INT iLayerPlane, DHGLRC hShareContext, ctx->hdc = hdc; ctx->iPixelFormat = iPixelFormat; + ctx->shared = shareCtx != NULL; memset(&attribs, 0, sizeof(attribs)); attribs.visual = pfi->stvis; @@ -403,7 +408,14 @@ stw_make_current(HDC hdc, DHGLRC dhglrc) return TRUE; } } else { - old_ctx->st->flush(old_ctx->st, ST_FLUSH_FRONT, NULL); + if (old_ctx->shared) { + struct pipe_fence_handle *fence = NULL; + old_ctx->st->flush(old_ctx->st, + ST_FLUSH_FRONT | ST_FLUSH_WAIT, &fence); + } + else { + old_ctx->st->flush(old_ctx->st, ST_FLUSH_FRONT, NULL); + } } } diff --git a/src/gallium/state_trackers/wgl/stw_context.h b/src/gallium/state_trackers/wgl/stw_context.h index 6bfa715..0f180c8 100644 --- a/src/gallium/state_trackers/wgl/stw_context.h +++ b/src/gallium/state_trackers/wgl/stw_context.h @@ -40,6 +40,7 @@ struct stw_context DHGLRC dhglrc; int iPixelFormat; HDC hdc; + BOOL shared; struct stw_framebuffer *current_framebuffer; -- 2.7.4