From: Axel Davy Date: Tue, 14 Jun 2016 21:13:26 +0000 (+0200) Subject: r600g: Implement POLYGON_OFFSET_UNITS_UNSCALED X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f6704f2a4db7113e597d4bab2cefc02e166c2ad9;p=mesa.git r600g: Implement POLYGON_OFFSET_UNITS_UNSCALED Empirical tests show that the polygon offset behaviour is entirely determined by the content of the PA_SU_POLY_OFFSET states, and not by the depth buffer format bound. PA_SU_POLY_OFFSET seems to directly set the parameters of the polygon offset formula, and setting 0 for PA_SU_POLY_OFFSET_DB_FMT_CNTL (ie setting the unorm depth bias behaviour with a scale of 2^0 = 1.0f) gives the unscaled behaviour. Signed-off-by: Axel Davy Reviewed-by: Marek Olšák --- diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c index 797f593795e..fab0359593a 100644 --- a/src/gallium/drivers/r600/evergreen_state.c +++ b/src/gallium/drivers/r600/evergreen_state.c @@ -492,6 +492,7 @@ static void *evergreen_create_rs_state(struct pipe_context *ctx, rs->offset_units = state->offset_units; rs->offset_scale = state->offset_scale * 16.0f; rs->offset_enable = state->offset_point || state->offset_line || state->offset_tri; + rs->offset_units_unscaled = state->offset_units_unscaled; if (state->point_size_per_vertex) { psize_min = util_get_min_point_size(state); @@ -1665,24 +1666,26 @@ static void evergreen_emit_polygon_offset(struct r600_context *rctx, struct r600 float offset_scale = state->offset_scale; uint32_t pa_su_poly_offset_db_fmt_cntl = 0; - switch (state->zs_format) { - case PIPE_FORMAT_Z24X8_UNORM: - case PIPE_FORMAT_Z24_UNORM_S8_UINT: - case PIPE_FORMAT_X8Z24_UNORM: - case PIPE_FORMAT_S8_UINT_Z24_UNORM: - offset_units *= 2.0f; - pa_su_poly_offset_db_fmt_cntl = - S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-24); - break; - case PIPE_FORMAT_Z16_UNORM: - offset_units *= 4.0f; - pa_su_poly_offset_db_fmt_cntl = - S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-16); - break; - default: - pa_su_poly_offset_db_fmt_cntl = - S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-23) | - S_028B78_POLY_OFFSET_DB_IS_FLOAT_FMT(1); + if (!state->offset_units_unscaled) { + switch (state->zs_format) { + case PIPE_FORMAT_Z24X8_UNORM: + case PIPE_FORMAT_Z24_UNORM_S8_UINT: + case PIPE_FORMAT_X8Z24_UNORM: + case PIPE_FORMAT_S8_UINT_Z24_UNORM: + offset_units *= 2.0f; + pa_su_poly_offset_db_fmt_cntl = + S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-24); + break; + case PIPE_FORMAT_Z16_UNORM: + offset_units *= 4.0f; + pa_su_poly_offset_db_fmt_cntl = + S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-16); + break; + default: + pa_su_poly_offset_db_fmt_cntl = + S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS((char)-23) | + S_028B78_POLY_OFFSET_DB_IS_FLOAT_FMT(1); + } } radeon_set_context_reg_seq(cs, R_028B80_PA_SU_POLY_OFFSET_FRONT_SCALE, 4); diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c index fe1af7c64bb..57721d92b85 100644 --- a/src/gallium/drivers/r600/r600_pipe.c +++ b/src/gallium/drivers/r600/r600_pipe.c @@ -282,6 +282,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param) case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS: case PIPE_CAP_QUERY_MEMORY_INFO: case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT: + case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED: return 1; case PIPE_CAP_DEVICE_RESET_STATUS_QUERY: @@ -370,7 +371,6 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param) case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES: case PIPE_CAP_TGSI_VOTE: case PIPE_CAP_MAX_WINDOW_RECTANGLES: - case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED: return 0; case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS: diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h index 9677bb64387..0dd538bcebe 100644 --- a/src/gallium/drivers/r600/r600_pipe.h +++ b/src/gallium/drivers/r600/r600_pipe.h @@ -273,6 +273,7 @@ struct r600_rasterizer_state { float offset_units; float offset_scale; bool offset_enable; + bool offset_units_unscaled; bool scissor_enable; bool multisample_enable; }; @@ -282,6 +283,7 @@ struct r600_poly_offset_state { enum pipe_format zs_format; float offset_units; float offset_scale; + bool offset_units_unscaled; }; struct r600_blend_state { diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c index 578aef992da..89a9f25b425 100644 --- a/src/gallium/drivers/r600/r600_state.c +++ b/src/gallium/drivers/r600/r600_state.c @@ -256,22 +256,24 @@ static void r600_emit_polygon_offset(struct r600_context *rctx, struct r600_atom float offset_scale = state->offset_scale; uint32_t pa_su_poly_offset_db_fmt_cntl = 0; - switch (state->zs_format) { - case PIPE_FORMAT_Z24X8_UNORM: - case PIPE_FORMAT_Z24_UNORM_S8_UINT: - offset_units *= 2.0f; - pa_su_poly_offset_db_fmt_cntl = - S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-24); - break; - case PIPE_FORMAT_Z16_UNORM: - offset_units *= 4.0f; - pa_su_poly_offset_db_fmt_cntl = - S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-16); - break; - default: - pa_su_poly_offset_db_fmt_cntl = - S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-23) | - S_028DF8_POLY_OFFSET_DB_IS_FLOAT_FMT(1); + if (!state->offset_units_unscaled) { + switch (state->zs_format) { + case PIPE_FORMAT_Z24X8_UNORM: + case PIPE_FORMAT_Z24_UNORM_S8_UINT: + offset_units *= 2.0f; + pa_su_poly_offset_db_fmt_cntl = + S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-24); + break; + case PIPE_FORMAT_Z16_UNORM: + offset_units *= 4.0f; + pa_su_poly_offset_db_fmt_cntl = + S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-16); + break; + default: + pa_su_poly_offset_db_fmt_cntl = + S_028DF8_POLY_OFFSET_NEG_NUM_DB_BITS((char)-23) | + S_028DF8_POLY_OFFSET_DB_IS_FLOAT_FMT(1); + } } radeon_set_context_reg_seq(cs, R_028E00_PA_SU_POLY_OFFSET_FRONT_SCALE, 4); @@ -492,6 +494,7 @@ static void *r600_create_rs_state(struct pipe_context *ctx, rs->offset_units = state->offset_units; rs->offset_scale = state->offset_scale * 16.0f; rs->offset_enable = state->offset_point || state->offset_line || state->offset_tri; + rs->offset_units_unscaled = state->offset_units_unscaled; if (state->point_size_per_vertex) { psize_min = util_get_min_point_size(state); diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c index 1ca583c883d..ce644b78c81 100644 --- a/src/gallium/drivers/r600/r600_state_common.c +++ b/src/gallium/drivers/r600/r600_state_common.c @@ -350,9 +350,11 @@ static void r600_bind_rs_state(struct pipe_context *ctx, void *state) if (rs->offset_enable && (rs->offset_units != rctx->poly_offset_state.offset_units || - rs->offset_scale != rctx->poly_offset_state.offset_scale)) { + rs->offset_scale != rctx->poly_offset_state.offset_scale || + rs->offset_units_unscaled != rctx->poly_offset_state.offset_units_unscaled)) { rctx->poly_offset_state.offset_units = rs->offset_units; rctx->poly_offset_state.offset_scale = rs->offset_scale; + rctx->poly_offset_state.offset_units_unscaled = rs->offset_units_unscaled; r600_mark_atom_dirty(rctx, &rctx->poly_offset_state.atom); }