From: José Fonseca Date: Sat, 4 Sep 2010 10:53:28 +0000 (+0100) Subject: util: Helper function to determined whether two formats can be memcpy'ed. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b8684b2458bc9bdcfd6b43dc7c2b8c2d485105fd;p=mesa.git util: Helper function to determined whether two formats can be memcpy'ed. These are the non-trivial conversions that this function recognizes, which was produced by u_format_compatible_test.c: b8g8r8a8_unorm -> b8g8r8x8_unorm a8r8g8b8_unorm -> x8r8g8b8_unorm b5g5r5a1_unorm -> b5g5r5x1_unorm b4g4r4a4_unorm -> b4g4r4x4_unorm l8_unorm -> r8_unorm i8_unorm -> l8_unorm i8_unorm -> a8_unorm i8_unorm -> r8_unorm l16_unorm -> r16_unorm z24_unorm_s8_uscaled -> z24x8_unorm s8_uscaled_z24_unorm -> x8z24_unorm r8g8b8a8_unorm -> r8g8b8x8_unorm a8b8g8r8_srgb -> x8b8g8r8_srgb b8g8r8a8_srgb -> b8g8r8x8_srgb a8r8g8b8_srgb -> x8r8g8b8_srgb a8b8g8r8_unorm -> x8b8g8r8_unorm r10g10b10a2_uscaled -> r10g10b10x2_uscaled r10sg10sb10sa2u_norm -> r10g10b10x2_snorm State trackers and pipe drivers should be updated to take advantage of this knowledge, e.g., in surface_copy. --- diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c index 43d09f19607..a4ee91b0cf9 100644 --- a/src/gallium/auxiliary/util/u_format.c +++ b/src/gallium/auxiliary/util/u_format.c @@ -120,6 +120,54 @@ util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_ } +boolean +util_is_format_compatible(const struct util_format_description *src_desc, + const struct util_format_description *dst_desc) +{ + unsigned chan; + + if (src_desc->format == dst_desc->format) { + return TRUE; + } + + if (src_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN || + dst_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN) { + return FALSE; + } + + if (src_desc->block.bits != dst_desc->block.bits || + src_desc->nr_channels != dst_desc->nr_channels || + src_desc->colorspace != dst_desc->colorspace) { + return FALSE; + } + + for (chan = 0; chan < 4; ++chan) { + if (src_desc->channel[chan].size != + dst_desc->channel[chan].size) { + return FALSE; + } + } + + for (chan = 0; chan < 4; ++chan) { + enum util_format_swizzle swizzle = dst_desc->swizzle[chan]; + + if (swizzle < 4) { + if (src_desc->swizzle[chan] != swizzle) { + return FALSE; + } + if ((src_desc->channel[swizzle].type != + dst_desc->channel[swizzle].type) || + (src_desc->channel[swizzle].normalized != + dst_desc->channel[swizzle].normalized)) { + return FALSE; + } + } + } + + return TRUE; +} + + boolean util_format_fits_8unorm(const struct util_format_description *format_desc) { @@ -193,7 +241,10 @@ util_format_translate(enum pipe_format dst_format, unsigned dst_step; unsigned src_step; - if (dst_format == src_format) { + dst_format_desc = util_format_description(dst_format); + src_format_desc = util_format_description(src_format); + + if (util_is_format_compatible(src_format_desc, dst_format_desc)) { /* * Trivial case. */ @@ -204,9 +255,6 @@ util_format_translate(enum pipe_format dst_format, return; } - dst_format_desc = util_format_description(dst_format); - src_format_desc = util_format_description(src_format); - assert(dst_x % dst_format_desc->block.width == 0); assert(dst_y % dst_format_desc->block.height == 0); assert(src_x % src_format_desc->block.width == 0); diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h index 59bd03b7740..03b73c0e98f 100644 --- a/src/gallium/auxiliary/util/u_format.h +++ b/src/gallium/auxiliary/util/u_format.h @@ -473,6 +473,15 @@ util_format_colormask(const struct util_format_description *desc) } +/** + * Whether the src format can be blitted to destation format with a simple + * memcpy. + */ +boolean +util_is_format_compatible(const struct util_format_description *src_desc, + const struct util_format_description *dst_desc); + + /** * Whether this format is a rgab8 variant. * diff --git a/src/gallium/tests/unit/Makefile b/src/gallium/tests/unit/Makefile index 345bd1f6941..bb3039f3bc7 100644 --- a/src/gallium/tests/unit/Makefile +++ b/src/gallium/tests/unit/Makefile @@ -23,6 +23,7 @@ SOURCES = \ u_cache_test.c \ u_half_test.c \ u_format_test.c \ + u_format_compatible_test.c \ translate_test.c diff --git a/src/gallium/tests/unit/SConscript b/src/gallium/tests/unit/SConscript index edc68e34d9e..359759e22b2 100644 --- a/src/gallium/tests/unit/SConscript +++ b/src/gallium/tests/unit/SConscript @@ -14,6 +14,7 @@ progs = [ 'pipe_barrier_test', 'u_cache_test', 'u_format_test', + 'u_format_compatible_test', 'u_half_test', 'translate_test' ] diff --git a/src/gallium/tests/unit/u_format_compatible_test.c b/src/gallium/tests/unit/u_format_compatible_test.c new file mode 100644 index 00000000000..c655c35f20a --- /dev/null +++ b/src/gallium/tests/unit/u_format_compatible_test.c @@ -0,0 +1,76 @@ +/************************************************************************** + * + * Copyright 2009-2010 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + +#include +#include + +#include "util/u_format.h" + + +static boolean +test_all(void) +{ + enum pipe_format src_format; + enum pipe_format dst_format; + + for (src_format = 1; src_format < PIPE_FORMAT_COUNT; ++src_format) { + const struct util_format_description *src_format_desc; + src_format_desc = util_format_description(src_format); + if (!src_format_desc) { + continue; + } + + for (dst_format = 1; dst_format < PIPE_FORMAT_COUNT; ++dst_format) { + const struct util_format_description *dst_format_desc; + dst_format_desc = util_format_description(dst_format); + if (!dst_format_desc) { + continue; + } + + if (dst_format == src_format) { + continue; + } + + if (util_is_format_compatible(src_format_desc, dst_format_desc)) { + debug_printf("%s -> %s\n", src_format_desc->short_name, dst_format_desc->short_name); + } + } + } + + return TRUE; +} + + +int main(int argc, char **argv) +{ + boolean success; + + success = test_all(); + + return success ? 0 : 1; +}