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/****************************************************************************
* Copyright (C) 2015 Intel Corporation. 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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_memory.h"
#include "swr_context.h"
#include "swr_scratch.h"
#include "api.h"
void *
swr_copy_to_scratch_space(struct swr_context *ctx,
struct swr_scratch_space *space,
const void *user_buffer,
unsigned int size)
{
void *ptr;
assert(space);
assert(user_buffer);
assert(size);
if (size >= 2048) { /* XXX TODO create KNOB_ for this */
/* Use per draw SwrAllocDrawContextMemory for larger copies */
ptr = SwrAllocDrawContextMemory(ctx->swrContext, size, 4);
} else {
/* Allocate enough so that MAX_DRAWS_IN_FLIGHT sets fit. */
unsigned int max_size_in_flight = size * KNOB_MAX_DRAWS_IN_FLIGHT;
/* Need to grow space */
if (max_size_in_flight > space->current_size) {
/* Must idle the pipeline, this is infrequent */
SwrWaitForIdle(ctx->swrContext);
space->current_size = max_size_in_flight;
if (space->base) {
align_free(space->base);
space->base = NULL;
}
if (!space->base) {
space->base = (BYTE *)align_malloc(space->current_size, 4);
space->head = (void *)space->base;
}
}
/* Wrap */
if (((BYTE *)space->head + size)
>= ((BYTE *)space->base + space->current_size)) {
/*
* TODO XXX: Should add a fence on wrap. Assumption is that
* current_space >> size, and there are at least MAX_DRAWS_IN_FLIGHT
* draws in scratch. So fence would always be met on wrap. A fence
* would ensure that first frame in buffer is done before wrapping.
* If fence ever needs to be waited on, can increase buffer size.
* So far in testing, this hasn't been necessary.
*/
space->head = space->base;
}
ptr = space->head;
space->head = (BYTE *)space->head + size;
}
/* Copy user_buffer to scratch */
memcpy(ptr, user_buffer, size);
return ptr;
}
void
swr_init_scratch_buffers(struct swr_context *ctx)
{
struct swr_scratch_buffers *scratch;
scratch = CALLOC_STRUCT(swr_scratch_buffers);
ctx->scratch = scratch;
}
void
swr_destroy_scratch_buffers(struct swr_context *ctx)
{
struct swr_scratch_buffers *scratch = ctx->scratch;
if (scratch) {
if (scratch->vs_constants.base)
align_free(scratch->vs_constants.base);
if (scratch->fs_constants.base)
align_free(scratch->fs_constants.base);
if (scratch->vertex_buffer.base)
align_free(scratch->vertex_buffer.base);
if (scratch->index_buffer.base)
align_free(scratch->index_buffer.base);
FREE(scratch);
}
}
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