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#include "util/u_memory.h"
#include "util/u_math.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "pipe/p_inlines.h"
#include "brw_screen.h"
#include "brw_winsys.h"
static void *
brw_buffer_map( struct pipe_screen *screen,
struct pipe_buffer *buffer,
unsigned usage )
{
struct brw_screen *bscreen = brw_screen(screen);
struct brw_winsys_screen *sws = bscreen->sws;
struct brw_buffer *buf = brw_buffer( buffer );
if (buf->user_buffer)
return buf->user_buffer;
return sws->bo_map( buf->bo,
(usage & PIPE_BUFFER_USAGE_CPU_WRITE) ? TRUE : FALSE );
}
static void
brw_buffer_unmap( struct pipe_screen *screen,
struct pipe_buffer *buffer )
{
struct brw_screen *bscreen = brw_screen(screen);
struct brw_winsys_screen *sws = bscreen->sws;
struct brw_buffer *buf = brw_buffer( buffer );
if (buf->bo)
sws->bo_unmap(buf->bo);
}
static void
brw_buffer_destroy( struct pipe_buffer *buffer )
{
struct brw_screen *bscreen = brw_screen( buffer->screen );
struct brw_winsys_screen *sws = bscreen->sws;
struct brw_buffer *buf = brw_buffer( buffer );
assert(!p_atomic_read(&buffer->reference.count));
if (buf->bo)
sws->bo_unreference(buf->bo);
FREE(buf);
}
static struct pipe_buffer *
brw_buffer_create(struct pipe_screen *screen,
unsigned alignment,
unsigned usage,
unsigned size)
{
struct brw_screen *bscreen = brw_screen(screen);
struct brw_winsys_screen *sws = bscreen->sws;
struct brw_buffer *buf;
unsigned usage_type;
buf = CALLOC_STRUCT(brw_buffer);
if (!buf)
return NULL;
pipe_reference_init(&buf->base.reference, 1);
buf->base.screen = screen;
buf->base.alignment = alignment;
buf->base.usage = usage;
buf->base.size = size;
switch (usage & (PIPE_BUFFER_USAGE_VERTEX |
PIPE_BUFFER_USAGE_INDEX |
PIPE_BUFFER_USAGE_PIXEL |
PIPE_BUFFER_USAGE_CONSTANT))
{
case PIPE_BUFFER_USAGE_VERTEX:
case PIPE_BUFFER_USAGE_INDEX:
case (PIPE_BUFFER_USAGE_VERTEX|PIPE_BUFFER_USAGE_INDEX):
usage_type = BRW_BUFFER_TYPE_VERTEX;
break;
case PIPE_BUFFER_USAGE_PIXEL:
usage_type = BRW_BUFFER_TYPE_PIXEL;
break;
case PIPE_BUFFER_USAGE_CONSTANT:
usage_type = BRW_BUFFER_TYPE_SHADER_CONSTANTS;
break;
default:
usage_type = BRW_BUFFER_TYPE_GENERIC;
break;
}
buf->bo = sws->bo_alloc( sws,
usage_type,
size,
alignment );
return &buf->base;
}
static struct pipe_buffer *
brw_user_buffer_create(struct pipe_screen *screen,
void *ptr,
unsigned bytes)
{
struct brw_buffer *buf;
buf = CALLOC_STRUCT(brw_buffer);
if (!buf)
return NULL;
buf->user_buffer = ptr;
pipe_reference_init(&buf->base.reference, 1);
buf->base.screen = screen;
buf->base.alignment = 1;
buf->base.usage = 0;
buf->base.size = bytes;
return &buf->base;
}
void brw_screen_buffer_init(struct brw_screen *brw_screen)
{
brw_screen->base.buffer_create = brw_buffer_create;
brw_screen->base.user_buffer_create = brw_user_buffer_create;
brw_screen->base.buffer_map = brw_buffer_map;
brw_screen->base.buffer_unmap = brw_buffer_unmap;
brw_screen->base.buffer_destroy = brw_buffer_destroy;
}
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