From 67c290de36ddc1caae94c0892157ac16b90e4f99 Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 31 Oct 2012 09:21:05 +0100 Subject: mesa git update 31 oct 2012 mesa: 183e122bdfe27f875c3c121964484dae9587c051 --- mesalib/src/gallium/auxiliary/util/u_helpers.c | 90 ++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 mesalib/src/gallium/auxiliary/util/u_helpers.c (limited to 'mesalib/src/gallium/auxiliary/util/u_helpers.c') diff --git a/mesalib/src/gallium/auxiliary/util/u_helpers.c b/mesalib/src/gallium/auxiliary/util/u_helpers.c new file mode 100644 index 000000000..ac1edcdbb --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_helpers.c @@ -0,0 +1,90 @@ +/************************************************************************** + * + * Copyright 2012 Marek Olšák + * 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 THE AUTHORS AND/OR THEIR 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 "util/u_helpers.h" +#include "util/u_inlines.h" + +/** + * This function is used to copy an array of pipe_vertex_buffer structures, + * while properly referencing the pipe_vertex_buffer::buffer member. + * + * enabled_buffers is updated such that the bits corresponding to the indices + * of disabled buffers are set to 0 and the enabled ones are set to 1. + * + * \sa util_copy_framebuffer_state + */ +void util_set_vertex_buffers_mask(struct pipe_vertex_buffer *dst, + uint32_t *enabled_buffers, + const struct pipe_vertex_buffer *src, + unsigned start_slot, unsigned count) +{ + unsigned i; + uint32_t bitmask = 0; + + dst += start_slot; + + if (src) { + for (i = 0; i < count; i++) { + if (src[i].buffer || src[i].user_buffer) { + bitmask |= 1 << i; + } + pipe_resource_reference(&dst[i].buffer, src[i].buffer); + } + + /* Copy over the other members of pipe_vertex_buffer. */ + memcpy(dst, src, count * sizeof(struct pipe_vertex_buffer)); + + *enabled_buffers &= ~(((1ull << count) - 1) << start_slot); + *enabled_buffers |= bitmask << start_slot; + } + else { + /* Unreference the buffers. */ + for (i = 0; i < count; i++) { + pipe_resource_reference(&dst[i].buffer, NULL); + dst[i].user_buffer = NULL; + } + + *enabled_buffers &= ~(((1ull << count) - 1) << start_slot); + } +} + +/** + * Same as util_set_vertex_buffers_mask, but it only returns the number + * of bound buffers. + */ +void util_set_vertex_buffers_count(struct pipe_vertex_buffer *dst, + unsigned *dst_count, + const struct pipe_vertex_buffer *src, + unsigned start_slot, unsigned count) +{ + uint32_t enabled_buffers = (1ull << *dst_count) - 1; + + util_set_vertex_buffers_mask(dst, &enabled_buffers, src, start_slot, + count); + + *dst_count = util_last_bit(enabled_buffers); +} -- cgit v1.2.3