From 1dc204d145dc8c0b19473a7814c201a8954b6274 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 28 Feb 2011 21:52:19 -0500 Subject: r600g: truncate point sampled texture coordinates By default the hardware rounds texcoords. However, for point sampled textures, the expected behavior is to truncate. When we have point sampled textures, set the truncate bit in the sampler. Should fix: https://bugs.freedesktop.org/show_bug.cgi?id=25871 Signed-off-by: Alex Deucher --- src/gallium/drivers/r600/r600_state.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'src/gallium/drivers/r600/r600_state.c') diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c index c365979e43..3f2af7d17b 100644 --- a/src/gallium/drivers/r600/r600_state.c +++ b/src/gallium/drivers/r600/r600_state.c @@ -358,11 +358,16 @@ static void *r600_create_sampler_state(struct pipe_context *ctx, { struct r600_pipe_state *rstate = CALLOC_STRUCT(r600_pipe_state); union util_color uc; + uint32_t coord_trunc = 0; if (rstate == NULL) { return NULL; } + if ((state->mag_img_filter == PIPE_TEX_FILTER_NEAREST) || + (state->min_img_filter == PIPE_TEX_FILTER_NEAREST)) + coord_trunc = 1; + rstate->id = R600_PIPE_STATE_SAMPLER; util_pack_color(state->border_color, PIPE_FORMAT_B8G8R8A8_UNORM, &uc); r600_pipe_state_add_reg(rstate, R_03C000_SQ_TEX_SAMPLER_WORD0_0, @@ -379,7 +384,9 @@ static void *r600_create_sampler_state(struct pipe_context *ctx, S_03C004_MIN_LOD(S_FIXED(CLAMP(state->min_lod, 0, 15), 6)) | S_03C004_MAX_LOD(S_FIXED(CLAMP(state->max_lod, 0, 15), 6)) | S_03C004_LOD_BIAS(S_FIXED(CLAMP(state->lod_bias, -16, 16), 6)), 0xFFFFFFFF, NULL); - r600_pipe_state_add_reg(rstate, R_03C008_SQ_TEX_SAMPLER_WORD2_0, S_03C008_TYPE(1), 0xFFFFFFFF, NULL); + r600_pipe_state_add_reg(rstate, R_03C008_SQ_TEX_SAMPLER_WORD2_0, + S_03C008_MC_COORD_TRUNCATE(coord_trunc) | + S_03C008_TYPE(1), 0xFFFFFFFF, NULL); if (uc.ui) { r600_pipe_state_add_reg(rstate, R_00A400_TD_PS_SAMPLER0_BORDER_RED, fui(state->border_color[0]), 0xFFFFFFFF, NULL); r600_pipe_state_add_reg(rstate, R_00A404_TD_PS_SAMPLER0_BORDER_GREEN, fui(state->border_color[1]), 0xFFFFFFFF, NULL); -- cgit v1.2.3