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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the implementation of some utilities for textures.
#include <stdlib.h>
#include "command_buffer/service/cross/texture_utils.h"
namespace command_buffer {
void MakeTransferInfo(TransferInfo *transfer_info,
const MipLevelInfo &mip_level,
const Volume &volume,
unsigned int row_pitch,
unsigned int slice_pitch) {
transfer_info->row_pitch = row_pitch;
transfer_info->slice_pitch = slice_pitch;
transfer_info->row_size =
volume.width / mip_level.block_size_x * mip_level.block_bpp;
transfer_info->slice_size = transfer_info->row_size +
(volume.height / mip_level.block_size_y - 1) * row_pitch;
transfer_info->total_size = transfer_info->slice_size +
(volume.depth - 1) * slice_pitch;
transfer_info->packed = (transfer_info->row_size == row_pitch) &&
(volume.depth == 1 || transfer_info->slice_size == slice_pitch);
}
void MakePackedTransferInfo(TransferInfo *transfer_info,
const MipLevelInfo &mip_level,
const Volume &volume) {
transfer_info->row_size =
volume.width / mip_level.block_size_x * mip_level.block_bpp;
transfer_info->row_pitch = transfer_info->row_size;
transfer_info->slice_size =
volume.height / mip_level.block_size_y * transfer_info->row_pitch;
transfer_info->slice_pitch = transfer_info->slice_size;
transfer_info->total_size = volume.depth * transfer_info->slice_pitch;
transfer_info->packed = true;
}
// Transfers a volume of texels.
void TransferVolume(const Volume &volume,
const MipLevelInfo &mip_level,
const TransferInfo &dst_transfer_info,
void *dst_data,
const TransferInfo &src_transfer_info,
const void *src_data) {
DCHECK_EQ(src_transfer_info.row_size, dst_transfer_info.row_size);
if (src_transfer_info.packed && dst_transfer_info.packed) {
// fast path
DCHECK_EQ(src_transfer_info.total_size, dst_transfer_info.total_size);
DCHECK_EQ(src_transfer_info.row_pitch, dst_transfer_info.row_pitch);
DCHECK_EQ(src_transfer_info.slice_pitch, dst_transfer_info.slice_pitch);
memcpy(dst_data, src_data, src_transfer_info.total_size);
} else {
const char *src = static_cast<const char *>(src_data);
char *dst = static_cast<char *>(dst_data);
for (unsigned int slice = 0; slice < volume.depth; ++slice) {
const char *row_src = src;
char *row_dst = dst;
for (unsigned int row = 0; row < volume.height;
row += mip_level.block_size_y) {
memcpy(row_dst, row_src, src_transfer_info.row_size);
row_src += src_transfer_info.row_pitch;
row_dst += dst_transfer_info.row_pitch;
}
src += src_transfer_info.slice_pitch;
dst += dst_transfer_info.slice_pitch;
}
}
}
} // namespace command_buffer
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