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Diffstat (limited to 'thirdparty/basis_universal/basisu_basis_file.cpp')
| -rw-r--r-- | thirdparty/basis_universal/basisu_basis_file.cpp | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/thirdparty/basis_universal/basisu_basis_file.cpp b/thirdparty/basis_universal/basisu_basis_file.cpp new file mode 100644 index 0000000000..3e6b1906b9 --- /dev/null +++ b/thirdparty/basis_universal/basisu_basis_file.cpp @@ -0,0 +1,204 @@ +// basisu_basis_file.cpp +// Copyright (C) 2019 Binomial LLC. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +#include "basisu_basis_file.h" +#include "transcoder/basisu_transcoder.h" + +// The output file version. Keep in sync with BASISD_SUPPORTED_BASIS_VERSION. +#define BASIS_FILE_VERSION (0x13) + +namespace basisu +{ + void basisu_file::create_header(const basisu_backend_output &encoder_output, basist::basis_texture_type tex_type, uint32_t userdata0, uint32_t userdata1, bool y_flipped, uint32_t us_per_frame) + { + m_header.m_header_size = sizeof(basist::basis_file_header); + + m_header.m_data_size = m_total_file_size - sizeof(basist::basis_file_header); + + m_header.m_total_slices = (uint32_t)encoder_output.m_slice_desc.size(); + + m_header.m_total_images = 0; + for (uint32_t i = 0; i < encoder_output.m_slice_desc.size(); i++) + m_header.m_total_images = maximum<uint32_t>(m_header.m_total_images, encoder_output.m_slice_desc[i].m_source_file_index + 1); + + m_header.m_format = 0;// basist::block_format::cETC1; + m_header.m_flags = 0; + + if (encoder_output.m_etc1s) + m_header.m_flags = m_header.m_flags | basist::cBASISHeaderFlagETC1S; + + if (y_flipped) + m_header.m_flags = m_header.m_flags | basist::cBASISHeaderFlagYFlipped; + + for (uint32_t i = 0; i < encoder_output.m_slice_desc.size(); i++) + { + if (encoder_output.m_slice_desc[i].m_alpha) + { + m_header.m_flags = m_header.m_flags | basist::cBASISHeaderFlagHasAlphaSlices; + break; + } + } + + m_header.m_tex_type = static_cast<uint8_t>(tex_type); + m_header.m_us_per_frame = clamp<uint32_t>(us_per_frame, 0, basist::cBASISMaxUSPerFrame); + + m_header.m_userdata0 = userdata0; + m_header.m_userdata1 = userdata1; + + m_header.m_total_endpoints = encoder_output.m_num_endpoints; + m_header.m_endpoint_cb_file_ofs = m_endpoint_cb_file_ofs; + m_header.m_endpoint_cb_file_size = (uint32_t)encoder_output.m_endpoint_palette.size(); + + m_header.m_total_selectors = encoder_output.m_num_selectors; + m_header.m_selector_cb_file_ofs = m_selector_cb_file_ofs; + m_header.m_selector_cb_file_size = (uint32_t)encoder_output.m_selector_palette.size(); + + m_header.m_tables_file_ofs = m_tables_file_ofs; + m_header.m_tables_file_size = (uint32_t)encoder_output.m_slice_image_tables.size(); + + m_header.m_slice_desc_file_ofs = m_slice_descs_file_ofs; + } + + bool basisu_file::create_image_descs(const basisu_backend_output &encoder_output) + { + const basisu_backend_slice_desc_vec &slice_descs = encoder_output.m_slice_desc; + + m_images_descs.resize(slice_descs.size()); + + uint64_t cur_slice_file_ofs = m_first_image_file_ofs; + for (uint32_t i = 0; i < slice_descs.size(); i++) + { + clear_obj(m_images_descs[i]); + + m_images_descs[i].m_image_index = slice_descs[i].m_source_file_index; + m_images_descs[i].m_level_index = slice_descs[i].m_mip_index; + + if (slice_descs[i].m_alpha) + m_images_descs[i].m_flags = m_images_descs[i].m_flags | basist::cSliceDescFlagsIsAlphaData; + if (slice_descs[i].m_iframe) + m_images_descs[i].m_flags = m_images_descs[i].m_flags | basist::cSliceDescFlagsFrameIsIFrame; + + m_images_descs[i].m_orig_width = slice_descs[i].m_orig_width; + m_images_descs[i].m_orig_height = slice_descs[i].m_orig_height; + m_images_descs[i].m_num_blocks_x = slice_descs[i].m_num_blocks_x; + m_images_descs[i].m_num_blocks_y = slice_descs[i].m_num_blocks_y; + m_images_descs[i].m_slice_data_crc16 = encoder_output.m_slice_image_crcs[i]; + + if (encoder_output.m_slice_image_data[i].size() > UINT32_MAX) + { + error_printf("basisu_file::create_image_descs: Basis file too large\n"); + return false; + } + + const uint32_t image_size = (uint32_t)encoder_output.m_slice_image_data[i].size(); + + m_images_descs[i].m_file_ofs = (uint32_t)cur_slice_file_ofs; + m_images_descs[i].m_file_size = image_size; + + cur_slice_file_ofs += image_size; + if (cur_slice_file_ofs > UINT32_MAX) + { + error_printf("basisu_file::create_image_descs: Basis file too large\n"); + return false; + } + } + + assert(cur_slice_file_ofs == m_total_file_size); + return true; + } + + void basisu_file::create_comp_data(const basisu_backend_output &encoder_output) + { + const basisu_backend_slice_desc_vec &slice_descs = encoder_output.m_slice_desc; + + append_vector(m_comp_data, reinterpret_cast<const uint8_t *>(&m_header), sizeof(m_header)); + + assert(m_comp_data.size() == m_slice_descs_file_ofs); + append_vector(m_comp_data, reinterpret_cast<const uint8_t*>(&m_images_descs[0]), m_images_descs.size() * sizeof(m_images_descs[0])); + + assert(m_comp_data.size() == m_endpoint_cb_file_ofs); + append_vector(m_comp_data, reinterpret_cast<const uint8_t*>(&encoder_output.m_endpoint_palette[0]), encoder_output.m_endpoint_palette.size()); + + assert(m_comp_data.size() == m_selector_cb_file_ofs); + append_vector(m_comp_data, reinterpret_cast<const uint8_t*>(&encoder_output.m_selector_palette[0]), encoder_output.m_selector_palette.size()); + + assert(m_comp_data.size() == m_tables_file_ofs); + append_vector(m_comp_data, reinterpret_cast<const uint8_t*>(&encoder_output.m_slice_image_tables[0]), encoder_output.m_slice_image_tables.size()); + + assert(m_comp_data.size() == m_first_image_file_ofs); + for (uint32_t i = 0; i < slice_descs.size(); i++) + append_vector(m_comp_data, &encoder_output.m_slice_image_data[i][0], encoder_output.m_slice_image_data[i].size()); + + assert(m_comp_data.size() == m_total_file_size); + } + + void basisu_file::fixup_crcs() + { + basist::basis_file_header *pHeader = reinterpret_cast<basist::basis_file_header *>(&m_comp_data[0]); + + pHeader->m_data_size = m_total_file_size - sizeof(basist::basis_file_header); + pHeader->m_data_crc16 = basist::crc16(&m_comp_data[0] + sizeof(basist::basis_file_header), m_total_file_size - sizeof(basist::basis_file_header), 0); + + pHeader->m_header_crc16 = basist::crc16(&pHeader->m_data_size, sizeof(basist::basis_file_header) - BASISU_OFFSETOF(basist::basis_file_header, m_data_size), 0); + + pHeader->m_sig = basist::basis_file_header::cBASISSigValue; + pHeader->m_ver = BASIS_FILE_VERSION;// basist::basis_file_header::cBASISFirstVersion; + } + + bool basisu_file::init(const basisu_backend_output &encoder_output, basist::basis_texture_type tex_type, uint32_t userdata0, uint32_t userdata1, bool y_flipped, uint32_t us_per_frame) + { + clear(); + + const basisu_backend_slice_desc_vec &slice_descs = encoder_output.m_slice_desc; + + // The Basis file uses 32-bit fields for lots of stuff, so make sure it's not too large. + uint64_t check_size = (uint64_t)sizeof(basist::basis_file_header) + (uint64_t)sizeof(basist::basis_slice_desc) * slice_descs.size() + + (uint64_t)encoder_output.m_endpoint_palette.size() + (uint64_t)encoder_output.m_selector_palette.size() + (uint64_t)encoder_output.m_slice_image_tables.size(); + if (check_size >= 0xFFFF0000ULL) + { + error_printf("basisu_file::init: File is too large!\n"); + return false; + } + + m_header_file_ofs = 0; + m_slice_descs_file_ofs = sizeof(basist::basis_file_header); + m_endpoint_cb_file_ofs = m_slice_descs_file_ofs + sizeof(basist::basis_slice_desc) * (uint32_t)slice_descs.size(); + m_selector_cb_file_ofs = m_endpoint_cb_file_ofs + (uint32_t)encoder_output.m_endpoint_palette.size(); + m_tables_file_ofs = m_selector_cb_file_ofs + (uint32_t)encoder_output.m_selector_palette.size(); + m_first_image_file_ofs = m_tables_file_ofs + (uint32_t)encoder_output.m_slice_image_tables.size(); + + uint64_t total_file_size = m_first_image_file_ofs; + for (uint32_t i = 0; i < encoder_output.m_slice_image_data.size(); i++) + total_file_size += encoder_output.m_slice_image_data[i].size(); + if (total_file_size >= 0xFFFF0000ULL) + { + error_printf("basisu_file::init: File is too large!\n"); + return false; + } + + m_total_file_size = (uint32_t)total_file_size; + + create_header(encoder_output, tex_type, userdata0, userdata1, y_flipped, us_per_frame); + + if (!create_image_descs(encoder_output)) + return false; + + create_comp_data(encoder_output); + + fixup_crcs(); + + return true; + } + +} // namespace basisu |