From 9c2a3934c5e039d996c721478eeb1fa3f956904e Mon Sep 17 00:00:00 2001 From: Marek Olšák Date: Mon, 10 Mar 2014 00:19:21 +0100 Subject: r600g: document why texture offset emulation is needed --- src/gallium/drivers/r600/r600_shader.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/gallium') diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index 0016d29a2a8..ddf79eee930 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -4800,8 +4800,9 @@ static int tgsi_tex(struct r600_shader_ctx *ctx) if (inst->Texture.NumOffsets) { assert(inst->Texture.NumOffsets == 1); + /* The texture offset feature doesn't work with the TXF instruction + * and must be emulated by adding the offset to the texture coordinates. */ if (txf_add_offsets) { - /* Add the offsets for texelFetch manually. */ const struct tgsi_texture_offset *off = inst->TexOffsets; switch (inst->Texture.Texture) { -- cgit v1.2.3