Module: Mesa Branch: master Commit: d573d1d82524b8a2e5f56938069cabc0f0176a0e URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=d573d1d82524b8a2e5f56938069cabc0f0176a0e
Author: Joshua Ashton <[email protected]> Date: Wed Apr 22 05:30:36 2020 +0100 radeonsi: Use TRUNC_COORD on samplers The default behaviour (0) is: "round-nearest-even to n.6 and drop fraction when point sampling" whereas the OpenGL spec simply wants us to floor it (1) "truncate when point sampling". See 8.14.2 in the OpenGL spec: https://www.khronos.org/registry/OpenGL/specs/gl/glspec46.core.pdf The Direct3D spec also mandates this (https://microsoft.github.io/DirectX-Specs/d3d/archive/D3D11_3_FunctionalSpec.htm#7.18.7%20Point%20Sample%20Addressing) On WineD3D: This fixes some point-sampling texture precision issues in some Direct3D 9 titles such as Guild Wars 2 and htoL#NiQ: The Firefly Diary that are not present on other vendors. CC: <[email protected]> Reviewed-by: Marek Olšák <[email protected]> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3953> --- src/gallium/drivers/radeonsi/si_state.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c index 08f32887216..19fb5a9cd1b 100644 --- a/src/gallium/drivers/radeonsi/si_state.c +++ b/src/gallium/drivers/radeonsi/si_state.c @@ -4478,6 +4478,8 @@ static void *si_create_sampler_state(struct pipe_context *ctx, struct si_sampler_state *rstate = CALLOC_STRUCT(si_sampler_state); unsigned max_aniso = sscreen->force_aniso >= 0 ? sscreen->force_aniso : state->max_anisotropy; unsigned max_aniso_ratio = si_tex_aniso_filter(max_aniso); + bool trunc_coord = state->min_img_filter == PIPE_TEX_FILTER_NEAREST && + state->mag_img_filter == PIPE_TEX_FILTER_NEAREST; union pipe_color_union clamped_border_color; if (!rstate) { @@ -4494,6 +4496,7 @@ static void *si_create_sampler_state(struct pipe_context *ctx, S_008F30_FORCE_UNNORMALIZED(!state->normalized_coords) | S_008F30_ANISO_THRESHOLD(max_aniso_ratio >> 1) | S_008F30_ANISO_BIAS(max_aniso_ratio) | S_008F30_DISABLE_CUBE_WRAP(!state->seamless_cube_map) | + S_008F30_TRUNC_COORD(trunc_coord) | S_008F30_COMPAT_MODE(sctx->chip_class == GFX8 || sctx->chip_class == GFX9)); rstate->val[1] = (S_008F34_MIN_LOD(S_FIXED(CLAMP(state->min_lod, 0, 15), 8)) | S_008F34_MAX_LOD(S_FIXED(CLAMP(state->max_lod, 0, 15), 8)) | _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
