From 8f6920a7b69bd20f04f807e88c22cf1eb78b4e79 Mon Sep 17 00:00:00 2001 From: Paul Berry Date: Wed, 28 Sep 2011 11:26:57 -0700 Subject: [PATCH] i965: Move ClipPlanesEnabled state to VS cache key. Previous to this patch, setup_uniform_clipplane_values() was setting up clip plane uniforms based on ctx->Transform.ClipPlanesEnabled, a piece of state not stored in the vertex shader cache key. As a result, a change to this piece of state might not trigger a necessary vertex shader recompile. The patch adds a field to the vertex shader cache key, userclip_planes_enabled, to store the current value of ctx->Transform.ClipPlanesEnabled. Also, it changes setup_uniform_clipplane_values() to read from this new field, so that it's manifestly clear that the vertex shader isn't depending on state not stored in the cache key. Note: when the vertex shader uses gl_ClipDistance, the VS backend doesn't need to know which clip planes are in use, so we leave the field as zero in that case to avoid unnecessary recompiles. Fixes Piglit test vs-clip-vertex-enables. Reviewed-by: Ian Romanick Reviewed-by: Eric Anholt --- src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 2 +- src/mesa/drivers/dri/i965/brw_vs.c | 2 ++ src/mesa/drivers/dri/i965/brw_vs.h | 6 ++++++ 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp index 17bde91bb2c..f99dc51682b 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp @@ -561,7 +561,7 @@ vec4_visitor::setup_uniform_clipplane_values() int compacted_clipplane_index = 0; for (int i = 0; i < MAX_CLIP_PLANES; ++i) { - if (ctx->Transform.ClipPlanesEnabled & (1 << i)) { + if (c->key.userclip_planes_enabled & (1 << i)) { this->uniform_vector_size[this->uniforms] = 4; this->userplane[compacted_clipplane_index] = dst_reg(UNIFORM, this->uniforms); this->userplane[compacted_clipplane_index].type = BRW_REGISTER_TYPE_F; diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c index 02e60dc20bf..eb673e29c96 100644 --- a/src/mesa/drivers/dri/i965/brw_vs.c +++ b/src/mesa/drivers/dri/i965/brw_vs.c @@ -289,6 +289,8 @@ static void brw_upload_vs_prog(struct brw_context *brw) key.program_string_id = vp->id; key.nr_userclip = _mesa_bitcount_64(ctx->Transform.ClipPlanesEnabled); key.uses_clip_distance = vp->program.UsesClipDistance; + if (!key.uses_clip_distance) + key.userclip_planes_enabled = ctx->Transform.ClipPlanesEnabled; key.copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL); diff --git a/src/mesa/drivers/dri/i965/brw_vs.h b/src/mesa/drivers/dri/i965/brw_vs.h index 7ec4ad8e793..a12b1390aad 100644 --- a/src/mesa/drivers/dri/i965/brw_vs.h +++ b/src/mesa/drivers/dri/i965/brw_vs.h @@ -57,6 +57,12 @@ struct brw_vs_prog_key { */ GLuint uses_clip_distance:1; + /** + * Which user clip planes are active. Zero if the shader uses + * gl_ClipDistance. + */ + GLuint userclip_planes_enabled:MAX_CLIP_PLANES; + GLuint copy_edgeflag:1; GLuint point_coord_replace:8; GLuint clamp_vertex_color:1; -- 2.11.0