From a3a4d01e415404e1bab76d440466952f4ab6171b Mon Sep 17 00:00:00 2001 From: Paul Berry Date: Wed, 21 Dec 2011 10:13:40 -0800 Subject: [PATCH] mesa: Save and restore GL_RASTERIZER_DISCARD state during meta ops. During meta-operations (such as _mesa_meta_GenerateMipmap()), we need to be able to draw even if GL_RASTERIZER_DISCARD is enabled. This patch causes _mesa_meta_begin() to save the state of GL_RASTERIZER_DISCARD and disable it (so that drawing can be done during the meta-op), and causes _mesa_meta_end() to restore it. Fixes piglit test "EXT_transform_feedback/generatemipmap discard" on i965 Gen6. Reviewed-by: Brian Paul Reviewed-by: Eric Anholt Reviewed-by: Kenneth Graunke --- src/mesa/drivers/common/meta.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index c5c59eb..144fa12 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -180,6 +180,7 @@ struct save_state /** Miscellaneous (always disabled) */ GLboolean Lighting; + GLboolean RasterDiscard; }; /** @@ -702,6 +703,9 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state) save->Lighting = ctx->Light.Enabled; if (ctx->Light.Enabled) _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE); + save->RasterDiscard = ctx->RasterDiscard; + if (ctx->RasterDiscard) + _mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_FALSE); } } @@ -981,6 +985,9 @@ _mesa_meta_end(struct gl_context *ctx) if (save->Lighting) { _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE); } + if (save->RasterDiscard) { + _mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_TRUE); + } } -- 2.7.4