/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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 TUNGSTEN GRAPHICS 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.
*
**************************************************************************/
/* Provide additional functionality on top of bufmgr buffers:
* - 2d semantics and blit operations (XXX: remove/simplify blits??)
* - refcounting of buffers for multiple images in a buffer.
* - refcounting of buffer mappings.
*/
#include "sp_context.h"
#include "sp_winsys.h"
#include "sp_region.h"
static void
sp_region_idle(struct pipe_context *pipe, struct pipe_region *region)
{
}
static GLubyte *
sp_region_map(struct pipe_context *pipe, struct pipe_region *region)
{
struct softpipe_context *sp = softpipe_context( pipe );
if (!region->map_refcount++) {
region->map = sp->winsys->buffer_map( sp->winsys,
region->buffer );
}
return region->map;
}
static void
sp_region_unmap(struct pipe_context *pipe, struct pipe_region *region)
{
struct softpipe_context *sp = softpipe_context( pipe );
if (!--region->map_refcount) {
sp->winsys->buffer_unmap( sp->winsys,
region->buffer );
region->map = NULL;
}
}
static struct pipe_region *
sp_region_alloc(struct pipe_context *pipe,
GLuint cpp, GLuint pitch, GLuint height)
{
struct softpipe_context *sp = softpipe_context( pipe );
struct pipe_region *region = calloc(sizeof(*region), 1);
region->cpp = cpp;
region->pitch = pitch;
region->height = height; /* needed? */
region->refcount = 1;
region->buffer = sp->winsys->create_buffer( sp->winsys, 64 );
sp->winsys->buffer_data( sp->winsys,
region->buffer,
pitch * cpp * height,
NULL );
return region;
}
static void
sp_region_release(struct pipe_context *pipe, struct pipe_region **region)
{
struct softpipe_context *sp = softpipe_context( pipe );
if (!*region)
return;
ASSERT((*region)->refcount > 0);
(*region)->refcount--;
if ((*region)->refcount == 0) {
assert((*region)->map_refcount == 0);
sp->winsys->buffer_unreference( sp->winsys,
(*region)->buffer );
free(*region);
}
*region = NULL;
}
/*
* XXX Move this into core Mesa?
*/
static void
_mesa_copy_rect(GLubyte * dst,
GLuint cpp,
GLuint dst_pitch,
GLuint dst_x,
GLuint dst_y,
GLuint width,
GLuint height,
const GLubyte * src,
GLuint src_pitch,
GLuint src_x,
GLuint src_y)
{
GLuint i;
dst_pitch *= cpp;
src_pitch *= cpp;
dst += dst_x * cpp;
src += src_x * cpp;
dst += dst_y * dst_pitch;
src += src_y * dst_pitch;
width *= cpp;
if (width == dst_pitch && width == src_pitch)
memcpy(dst, src, height * width);
else {
for (i = 0; i < height; i++) {
memcpy(dst, src, width);
dst += dst_pitch;
src += src_pitch;
}
}
}
/* Upload data to a rectangular sub-region. Lots of choices how to do this:
*
* - memcpy by span to current destination
* - upload data as new buffer and blit
*
* Currently always memcpy.
*/
static void
sp_region_data(struct pipe_context *pipe,
struct pipe_region *dst,
GLuint dst_offset,
GLuint dstx, GLuint dsty,
const void *src, GLuint src_pitch,
GLuint srcx, GLuint srcy, GLuint width, GLuint height)
{
_mesa_copy_rect(pipe->region_map(pipe, dst) + dst_offset,
dst->cpp,
dst->pitch,
dstx, dsty, width, height, src, src_pitch, srcx, srcy);
pipe->region_unmap(pipe, dst);
}
/* Assumes all values are within bounds -- no checking at this level -
* do it higher up if required.
*/
static void
sp_region_copy(struct pipe_context *pipe,
struct pipe_region *dst,
GLuint dst_offset,
GLuint dstx, GLuint dsty,
struct pipe_region *src,
GLuint src_offset,
GLuint srcx, GLuint srcy, GLuint width, GLuint height)
{
assert( dst != src );
assert( dst->cpp == src->cpp );
_mesa_copy_rect(pipe->region_map(pipe, dst) + dst_offset,
dst->cpp,
dst->pitch,
dstx, dsty,
width, height,
pipe->region_map(pipe, src) + src_offset,
src->pitch,
srcx, srcy);
pipe->region_unmap(pipe, src);
pipe->region_unmap(pipe, dst);
}
/* Fill a rectangular sub-region. Need better logic about when to
* push buffers into AGP - will currently do so whenever possible.
*/
static GLubyte *
get_pointer(struct pipe_region *dst, GLuint x, GLuint y)
{
return dst->map + (y * dst->pitch + x) * dst->cpp;
}
static void
sp_region_fill(struct pipe_context *pipe,
struct pipe_region *dst,
GLuint dst_offset,
GLuint dstx, GLuint dsty,
GLuint width, GLuint height, GLuint value)
{
GLuint i, j;
(void)pipe->region_map(pipe, dst);
switch (dst->cpp) {
case 1: {
GLubyte *row = get_pointer(dst, dstx, dsty);
for (i = 0; i < height; i++) {
memset(row, value, width);
row += dst->pitch;
}
}
break;
case 2: {
GLushort *row = (GLushort *) get_pointer(dst, dstx, dsty);
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++)
row[j] = value;
row += dst->pitch;
}
}
break;
case 4: {
GLuint *row = (GLuint *) get_pointer(dst, dstx, dsty);
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++)
row[j] = value;
row += dst->pitch;
}
}
break;
default:
assert(0);
break;
}
pipe->region_unmap( pipe, dst );
}
void
sp_init_region_functions(struct softpipe_context *sp)
{
sp->pipe.region_idle = sp_region_idle;
sp->pipe.region_map = sp_region_map;
sp->pipe.region_unmap = sp_region_unmap;
sp->pipe.region_alloc = sp_region_alloc;
sp->pipe.region_release = sp_region_release;
sp->pipe.region_data = sp_region_data;
sp->pipe.region_copy = sp_region_copy;
sp->pipe.region_fill = sp_region_fill;
}