From 70fc3a941abc876f8679a32bc9aa83ff3ca2a129 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 4 Nov 2016 12:04:15 -0700 Subject: [PATCH] vc4: Make sure that vertex shader texture2D() calls use LOD 0. I noticed this while trying to debug glmark2 terrain (which does vertex shader texturing, but no mipmaps on its textures sampled from the VS). --- src/gallium/drivers/vc4/vc4_program.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 809c96d..f4be5f4 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -417,6 +417,16 @@ ntq_emit_tex(struct vc4_compile *c, nir_tex_instr *instr) } } + if (c->stage != QSTAGE_FRAG && !is_txl) { + /* From the GLSL 1.20 spec: + * + * "If it is mip-mapped and running on the vertex shader, + * then the base texture is used." + */ + is_txl = true; + lod = qir_uniform_ui(c, 0); + } + if (c->key->tex[unit].force_first_level) { lod = qir_uniform(c, QUNIFORM_TEXTURE_FIRST_LEVEL, unit); is_txl = true; -- 2.7.4