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/**************************************************************************
*
* Copyright 2009 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.
*
**************************************************************************/
/* Helper utility for uploading user buffers & other data, and
* coalescing small buffers into larger ones.
*/
#include "pipe/p_error.h"
#include "pipe/p_inlines.h"
#include "pipe/p_screen.h"
#include "util/u_memory.h"
#include "util/u_math.h"
#include "u_upload_mgr.h"
struct u_upload_mgr {
struct pipe_screen *screen;
unsigned default_size;
unsigned alignment;
unsigned usage;
/* The active buffer:
*/
struct pipe_buffer *buffer;
unsigned size;
unsigned offset;
};
struct u_upload_mgr *u_upload_create( struct pipe_screen *screen,
unsigned default_size,
unsigned alignment,
unsigned usage )
{
struct u_upload_mgr *upload = CALLOC_STRUCT( u_upload_mgr );
upload->default_size = default_size;
upload->screen = screen;
upload->alignment = alignment;
upload->usage = usage;
upload->buffer = NULL;
return upload;
}
static INLINE void
my_buffer_write(struct pipe_screen *screen,
struct pipe_buffer *buf,
unsigned offset, unsigned size, unsigned dirty_size,
const void *data)
{
uint8_t *map;
assert(offset < buf->size);
assert(offset + size <= buf->size);
assert(dirty_size >= size);
assert(size);
map = pipe_buffer_map_range(screen, buf, offset, size, PIPE_BUFFER_USAGE_CPU_WRITE);
assert(map);
if(map) {
memcpy(map + offset, data, size);
pipe_buffer_flush_mapped_range(screen, buf, offset, dirty_size);
pipe_buffer_unmap(screen, buf);
}
}
/* Release old buffer.
*
* This must usually be called prior to firing the command stream
* which references the upload buffer, as many memory managers will
* cause subsequent maps of a fired buffer to wait.
*
* Can improve this with a change to pipe_buffer_write to use the
* DONT_WAIT bit, but for now, it's easiest just to grab a new buffer.
*/
void u_upload_flush( struct u_upload_mgr *upload )
{
pipe_buffer_reference( &upload->buffer, NULL );
upload->size = 0;
}
void u_upload_destroy( struct u_upload_mgr *upload )
{
u_upload_flush( upload );
FREE( upload );
}
static enum pipe_error
u_upload_alloc_buffer( struct u_upload_mgr *upload,
unsigned min_size )
{
/* Release old buffer, if present:
*/
u_upload_flush( upload );
/* Allocate a new one:
*/
upload->size = align(MAX2(upload->default_size, min_size), 4096);
upload->buffer = pipe_buffer_create( upload->screen,
upload->alignment,
upload->usage | PIPE_BUFFER_USAGE_CPU_WRITE,
upload->size );
if (upload->buffer == NULL)
goto fail;
upload->offset = 0;
return 0;
fail:
if (upload->buffer)
pipe_buffer_reference( &upload->buffer, NULL );
return PIPE_ERROR_OUT_OF_MEMORY;
}
enum pipe_error u_upload_data( struct u_upload_mgr *upload,
unsigned size,
const void *data,
unsigned *out_offset,
struct pipe_buffer **outbuf )
{
unsigned alloc_size = align( size, upload->alignment );
enum pipe_error ret = PIPE_OK;
if (upload->offset + alloc_size > upload->size) {
ret = u_upload_alloc_buffer( upload, alloc_size );
if (ret)
return ret;
}
/* Copy the data, using map_range if available:
*/
my_buffer_write( upload->screen,
upload->buffer,
upload->offset,
size,
alloc_size,
data );
/* Emit the return values:
*/
pipe_buffer_reference( outbuf, upload->buffer );
*out_offset = upload->offset;
upload->offset += alloc_size;
return PIPE_OK;
}
/* As above, but upload the full contents of a buffer. Useful for
* uploading user buffers, avoids generating an explosion of GPU
* buffers if you have an app that does lots of small vertex buffer
* renders or DrawElements calls.
*/
enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
unsigned offset,
unsigned size,
struct pipe_buffer *inbuf,
unsigned *out_offset,
struct pipe_buffer **outbuf )
{
enum pipe_error ret = PIPE_OK;
const char *map = NULL;
map = (const char *)pipe_buffer_map(
upload->screen, inbuf, PIPE_BUFFER_USAGE_CPU_READ );
if (map == NULL) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto done;
}
if (0)
debug_printf("upload ptr %p ofs %d sz %d\n", map, offset, size);
ret = u_upload_data( upload,
size,
map + offset,
out_offset,
outbuf );
if (ret)
goto done;
done:
if (map)
pipe_buffer_unmap( upload->screen, inbuf );
return ret;
}
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