Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
||
| 3 | * Copyright 2012 Marek Olšák |
||
| 4 | * All Rights Reserved. |
||
| 5 | * |
||
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 7 | * copy of this software and associated documentation files (the |
||
| 8 | * "Software"), to deal in the Software without restriction, including |
||
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
||
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
||
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
||
| 12 | * the following conditions: |
||
| 13 | * |
||
| 14 | * The above copyright notice and this permission notice (including the |
||
| 15 | * next paragraph) shall be included in all copies or substantial portions |
||
| 16 | * of the Software. |
||
| 17 | * |
||
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
||
| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
||
| 21 | * IN NO EVENT SHALL THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR |
||
| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
||
| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
||
| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 25 | * |
||
| 26 | **************************************************************************/ |
||
| 27 | |||
| 28 | #include "util/u_helpers.h" |
||
| 29 | #include "util/u_inlines.h" |
||
| 30 | |||
| 31 | /** |
||
| 32 | * This function is used to copy an array of pipe_vertex_buffer structures, |
||
| 33 | * while properly referencing the pipe_vertex_buffer::buffer member. |
||
| 34 | * |
||
| 35 | * enabled_buffers is updated such that the bits corresponding to the indices |
||
| 36 | * of disabled buffers are set to 0 and the enabled ones are set to 1. |
||
| 37 | * |
||
| 38 | * \sa util_copy_framebuffer_state |
||
| 39 | */ |
||
| 40 | void util_set_vertex_buffers_mask(struct pipe_vertex_buffer *dst, |
||
| 41 | uint32_t *enabled_buffers, |
||
| 42 | const struct pipe_vertex_buffer *src, |
||
| 43 | unsigned start_slot, unsigned count) |
||
| 44 | { |
||
| 45 | unsigned i; |
||
| 46 | uint32_t bitmask = 0; |
||
| 47 | |||
| 48 | dst += start_slot; |
||
| 49 | |||
| 50 | if (src) { |
||
| 51 | for (i = 0; i < count; i++) { |
||
| 52 | if (src[i].buffer || src[i].user_buffer) { |
||
| 53 | bitmask |= 1 << i; |
||
| 54 | } |
||
| 55 | pipe_resource_reference(&dst[i].buffer, src[i].buffer); |
||
| 56 | } |
||
| 57 | |||
| 58 | /* Copy over the other members of pipe_vertex_buffer. */ |
||
| 59 | memcpy(dst, src, count * sizeof(struct pipe_vertex_buffer)); |
||
| 60 | |||
| 61 | *enabled_buffers &= ~(((1ull << count) - 1) << start_slot); |
||
| 62 | *enabled_buffers |= bitmask << start_slot; |
||
| 63 | } |
||
| 64 | else { |
||
| 65 | /* Unreference the buffers. */ |
||
| 66 | for (i = 0; i < count; i++) { |
||
| 67 | pipe_resource_reference(&dst[i].buffer, NULL); |
||
| 68 | dst[i].user_buffer = NULL; |
||
| 69 | } |
||
| 70 | |||
| 71 | *enabled_buffers &= ~(((1ull << count) - 1) << start_slot); |
||
| 72 | } |
||
| 73 | } |
||
| 74 | |||
| 75 | /** |
||
| 76 | * Same as util_set_vertex_buffers_mask, but it only returns the number |
||
| 77 | * of bound buffers. |
||
| 78 | */ |
||
| 79 | void util_set_vertex_buffers_count(struct pipe_vertex_buffer *dst, |
||
| 80 | unsigned *dst_count, |
||
| 81 | const struct pipe_vertex_buffer *src, |
||
| 82 | unsigned start_slot, unsigned count) |
||
| 83 | { |
||
| 84 | uint32_t enabled_buffers = (1ull << *dst_count) - 1; |
||
| 85 | |||
| 86 | util_set_vertex_buffers_mask(dst, &enabled_buffers, src, start_slot, |
||
| 87 | count); |
||
| 88 | |||
| 89 | *dst_count = util_last_bit(enabled_buffers); |
||
| 90 | } |