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/*
* Copyright 2016 Red Hat.
*
* 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
* on 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 AUTHOR(S) 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 "sp_context.h"
#include "sp_buffer.h"
#include "sp_texture.h"
#include "util/format/u_format.h"
static void *
sp_tgsi_ssbo_lookup(const struct tgsi_buffer *buffer,
uint32_t unit,
uint32_t *size)
{
struct sp_tgsi_buffer *sp_buf = (struct sp_tgsi_buffer *)buffer;
*size = 0;
if (unit >= PIPE_MAX_SHADER_BUFFERS)
return NULL;
struct pipe_shader_buffer *bview = &sp_buf->sp_bview[unit];
/* Sanity check the view size is within our buffer. */
if (!bview->buffer ||
bview->buffer_offset > bview->buffer->width0 ||
bview->buffer_size > bview->buffer->width0 - bview->buffer_offset) {
return NULL;
}
struct softpipe_resource *spr = softpipe_resource(bview->buffer);
*size = bview->buffer_size;
return (char *)spr->data + bview->buffer_offset;
}
struct sp_tgsi_buffer *
sp_create_tgsi_buffer(void)
{
struct sp_tgsi_buffer *buf = CALLOC_STRUCT(sp_tgsi_buffer);
if (!buf)
return NULL;
buf->base.lookup = sp_tgsi_ssbo_lookup;
return buf;
};
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