From c732d069b3a4a5fefb353d01d17834ce2c548ae6 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Wed, 4 Apr 2018 21:43:28 -0400 Subject: [PATCH] radeonsi: implement DCC fast clear swizzle constraints more accurately MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Reduce swizzle constraints to the ALPHA_IS_ON_MSB constraint and the clear value of 1. This significantly changes the DCC fast clear code, and fixes fast clear for RGB formats without alpha. Reviewed-by: Nicolai Hähnle --- src/gallium/drivers/radeonsi/si_clear.c | 94 ++++++++++++++++++++++----------- src/gallium/drivers/radeonsi/si_pipe.h | 2 + src/gallium/drivers/radeonsi/si_state.c | 4 +- 3 files changed, 65 insertions(+), 35 deletions(-) diff --git a/src/gallium/drivers/radeonsi/si_clear.c b/src/gallium/drivers/radeonsi/si_clear.c index 7a8fdf5..b5a5b21 100644 --- a/src/gallium/drivers/radeonsi/si_clear.c +++ b/src/gallium/drivers/radeonsi/si_clear.c @@ -93,7 +93,27 @@ static void si_set_clear_color(struct r600_texture *rtex, memcpy(rtex->color_clear_value, &uc, 2 * sizeof(uint32_t)); } -static bool vi_get_fast_clear_parameters(enum pipe_format surface_format, +/** Linearize and convert luminace/intensity to red. */ +enum pipe_format si_simplify_cb_format(enum pipe_format format) +{ + format = util_format_linear(format); + format = util_format_luminance_to_red(format); + return util_format_intensity_to_red(format); +} + +bool vi_alpha_is_on_msb(enum pipe_format format) +{ + format = si_simplify_cb_format(format); + + /* Formats with 3 channels can't have alpha. */ + if (util_format_description(format)->nr_channels == 3) + return true; /* same as xxxA; is any value OK here? */ + + return si_translate_colorswap(format, false) <= 1; +} + +static bool vi_get_fast_clear_parameters(enum pipe_format base_format, + enum pipe_format surface_format, const union pipe_color_union *color, uint32_t* clear_value, bool *eliminate_needed) @@ -103,17 +123,14 @@ static bool vi_get_fast_clear_parameters(enum pipe_format surface_format, * formats). */ bool values[4] = {}; /* whether to clear to 0 or 1 */ - int i; bool color_value = false; /* clear color to 0 or 1 */ bool alpha_value = false; /* clear alpha to 0 or 1 */ int alpha_channel; /* index of the alpha component */ + bool has_color = false; + bool has_alpha = false; - /* Convert luminance to red. (the latter can't handle L8_SRGB, - * so convert to linear) */ - surface_format = util_format_linear(surface_format); - surface_format = util_format_luminance_to_red(surface_format); - - const struct util_format_description *desc = util_format_description(surface_format); + const struct util_format_description *desc = + util_format_description(si_simplify_cb_format(surface_format)); /* 128-bit fast clear with different R,G,B values is unsupported. */ if (desc->block.bits == 128 && @@ -124,24 +141,22 @@ static bool vi_get_fast_clear_parameters(enum pipe_format surface_format, *eliminate_needed = true; *clear_value = 0x20202020U; /* use CB clear color registers */ - if (surface_format == PIPE_FORMAT_R11G11B10_FLOAT || - surface_format == PIPE_FORMAT_B5G6R5_UNORM || - surface_format == PIPE_FORMAT_B5G6R5_SRGB || - util_format_is_alpha(surface_format)) { - alpha_channel = -1; - } else if (desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) { - if (si_translate_colorswap(surface_format, false) <= 1) - alpha_channel = desc->nr_channels - 1; - else - alpha_channel = 0; - } else + if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN) return true; /* need ELIMINATE_FAST_CLEAR */ - for (i = 0; i < 4; ++i) { - int index = desc->swizzle[i] - PIPE_SWIZZLE_X; + bool base_alpha_is_on_msb = vi_alpha_is_on_msb(base_format); + bool surf_alpha_is_on_msb = vi_alpha_is_on_msb(surface_format); + + /* Formats with 3 channels can't have alpha. */ + if (desc->nr_channels == 3) + alpha_channel = -1; + else if (surf_alpha_is_on_msb) + alpha_channel = desc->nr_channels - 1; + else + alpha_channel = 0; - if (desc->swizzle[i] < PIPE_SWIZZLE_X || - desc->swizzle[i] > PIPE_SWIZZLE_W) + for (int i = 0; i < 4; ++i) { + if (desc->swizzle[i] >= PIPE_SWIZZLE_0) continue; if (desc->channel[i].pure_integer && @@ -166,18 +181,32 @@ static bool vi_get_fast_clear_parameters(enum pipe_format surface_format, return true; /* need ELIMINATE_FAST_CLEAR */ } - if (index == alpha_channel) + if (desc->swizzle[i] == alpha_channel) { alpha_value = values[i]; - else + has_alpha = true; + } else { color_value = values[i]; + has_color = true; + } } - for (int i = 0; i < 4; ++i) - if (values[i] != color_value && - desc->swizzle[i] - PIPE_SWIZZLE_X != alpha_channel && - desc->swizzle[i] >= PIPE_SWIZZLE_X && - desc->swizzle[i] <= PIPE_SWIZZLE_W) - return true; /* need ELIMINATE_FAST_CLEAR */ + /* If alpha isn't present, make it the same as color, and vice versa. */ + if (!has_alpha) + alpha_value = color_value; + else if (!has_color) + color_value = alpha_value; + + if (color_value != alpha_value && + base_alpha_is_on_msb != surf_alpha_is_on_msb) + return true; /* require ELIMINATE_FAST_CLEAR */ + + /* Check if all color values are equal if they are present. */ + for (int i = 0; i < 4; ++i) { + if (desc->swizzle[i] <= PIPE_SWIZZLE_W && + desc->swizzle[i] != alpha_channel && + values[i] != color_value) + return true; /* require ELIMINATE_FAST_CLEAR */ + } /* This doesn't need ELIMINATE_FAST_CLEAR. * CB uses both the DCC clear codes and the CB clear color registers, @@ -454,7 +483,8 @@ static void si_do_fast_color_clear(struct si_context *sctx, !tex->surface.u.legacy.level[level].dcc_fast_clear_size) continue; - if (!vi_get_fast_clear_parameters(fb->cbufs[i]->format, + if (!vi_get_fast_clear_parameters(tex->resource.b.b.format, + fb->cbufs[i]->format, color, &reset_value, &eliminate_needed)) continue; diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h index f73e0d1..24221d0 100644 --- a/src/gallium/drivers/radeonsi/si_pipe.h +++ b/src/gallium/drivers/radeonsi/si_pipe.h @@ -879,6 +879,8 @@ void si_init_screen_buffer_functions(struct si_screen *sscreen); void si_init_buffer_functions(struct si_context *sctx); /* si_clear.c */ +enum pipe_format si_simplify_cb_format(enum pipe_format format); +bool vi_alpha_is_on_msb(enum pipe_format format); void vi_dcc_clear_level(struct si_context *sctx, struct r600_texture *rtex, unsigned level, unsigned clear_value); diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c index fee4f06..7e30666 100644 --- a/src/gallium/drivers/radeonsi/si_state.c +++ b/src/gallium/drivers/radeonsi/si_state.c @@ -3742,9 +3742,7 @@ si_make_texture_descriptor(struct si_screen *screen, } if (tex->dcc_offset) { - unsigned swap = si_translate_colorswap(pipe_format, false); - - state[6] = S_008F28_ALPHA_IS_ON_MSB(swap <= 1); + state[6] = S_008F28_ALPHA_IS_ON_MSB(vi_alpha_is_on_msb(pipe_format)); } else { /* The last dword is unused by hw. The shader uses it to clear * bits in the first dword of sampler state. -- 2.7.4