From ecc4800383fb67cd274154469d933c6050782208 Mon Sep 17 00:00:00 2001 From: Francisco Jerez Date: Fri, 1 Jul 2016 13:54:05 -0700 Subject: [PATCH] i965: Implement glBlendBarrier. This is a no-op if the platform supports coherent framebuffer fetch, -- If it doesn't we just need to flush the render cache and invalidate the texture cache in order for previous rendering to be visible to framebuffer fetch. Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_program.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_program.c b/src/mesa/drivers/dri/i965/brw_program.c index 0e55c7ba18e..9d32dd3c3ff 100644 --- a/src/mesa/drivers/dri/i965/brw_program.c +++ b/src/mesa/drivers/dri/i965/brw_program.c @@ -310,6 +310,25 @@ brw_memory_barrier(struct gl_context *ctx, GLbitfield barriers) brw_emit_pipe_control_flush(brw, bits); } +static void +brw_blend_barrier(struct gl_context *ctx) +{ + struct brw_context *brw = brw_context(ctx); + + if (!ctx->Extensions.MESA_shader_framebuffer_fetch) { + if (brw->gen >= 6) { + brw_emit_pipe_control_flush(brw, + PIPE_CONTROL_RENDER_TARGET_FLUSH | + PIPE_CONTROL_CS_STALL); + brw_emit_pipe_control_flush(brw, + PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE); + } else { + brw_emit_pipe_control_flush(brw, + PIPE_CONTROL_RENDER_TARGET_FLUSH); + } + } +} + void brw_add_texrect_params(struct gl_program *prog) { @@ -379,6 +398,7 @@ void brwInitFragProgFuncs( struct dd_function_table *functions ) functions->LinkShader = brw_link_shader; functions->MemoryBarrier = brw_memory_barrier; + functions->BlendBarrier = brw_blend_barrier; } struct shader_times { -- 2.30.2