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basisu_comp.cpp
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basisu_comp.cpp
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// basisu_comp.cpp
// Copyright (C) 2017-2019 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_comp.h"
#include "basisu_enc.h"
#include <unordered_set>
#define BASISU_USE_STB_IMAGE_RESIZE_FOR_MIPMAP_GEN 0
#define DEBUG_RESIZE_TEXTURE_TO_64x64 (0)
#define DEBUG_EXTRACT_SINGLE_BLOCK (0)
namespace basisu
{
basis_compressor::basis_compressor() :
m_total_blocks(0),
m_auto_global_sel_pal(false),
m_basis_file_size(0),
m_basis_bits_per_texel(0),
m_any_source_image_has_alpha(false)
{
debug_printf("basis_compressor::basis_compressor\n");
}
bool basis_compressor::init(const basis_compressor_params ¶ms)
{
debug_printf("basis_compressor::init\n");
m_params = params;
if (m_params.m_debug)
{
debug_printf("basis_compressor::init:\n");
#define PRINT_BOOL_VALUE(v) debug_printf("%s: %u %u\n", BASISU_STRINGIZE2(v), static_cast<int>(m_params.v), m_params.v.was_changed());
#define PRINT_INT_VALUE(v) debug_printf("%s: %i %u\n", BASISU_STRINGIZE2(v), static_cast<int>(m_params.v), m_params.v.was_changed());
#define PRINT_UINT_VALUE(v) debug_printf("%s: %u %u\n", BASISU_STRINGIZE2(v), static_cast<uint32_t>(m_params.v), m_params.v.was_changed());
#define PRINT_FLOAT_VALUE(v) debug_printf("%s: %f %u\n", BASISU_STRINGIZE2(v), static_cast<float>(m_params.v), m_params.v.was_changed());
debug_printf("Has global selector codebook: %i\n", m_params.m_pSel_codebook != nullptr);
debug_printf("Source images: %u, source filenames: %u, source alpha filenames: %i\n",
(uint32_t)m_params.m_source_images.size(), (uint32_t)m_params.m_source_filenames.size(), (uint32_t)m_params.m_source_alpha_filenames.size());
PRINT_BOOL_VALUE(m_y_flip);
PRINT_BOOL_VALUE(m_debug);
PRINT_BOOL_VALUE(m_debug_images);
PRINT_BOOL_VALUE(m_global_sel_pal);
PRINT_BOOL_VALUE(m_no_auto_global_sel_pal);
PRINT_BOOL_VALUE(m_no_endpoint_refinement);
PRINT_BOOL_VALUE(m_no_hybrid_sel_cb);
PRINT_BOOL_VALUE(m_perceptual);
PRINT_BOOL_VALUE(m_no_endpoint_rdo);
PRINT_BOOL_VALUE(m_no_selector_rdo);
PRINT_BOOL_VALUE(m_read_source_images);
PRINT_BOOL_VALUE(m_write_output_basis_files);
PRINT_BOOL_VALUE(m_faster);
PRINT_BOOL_VALUE(m_compute_stats);
PRINT_BOOL_VALUE(m_check_for_alpha)
PRINT_BOOL_VALUE(m_force_alpha)
PRINT_BOOL_VALUE(m_seperate_rg_to_color_alpha);
PRINT_FLOAT_VALUE(m_hybrid_sel_cb_quality_thresh);
PRINT_INT_VALUE(m_global_pal_bits);
PRINT_INT_VALUE(m_global_mod_bits);
PRINT_FLOAT_VALUE(m_endpoint_rdo_thresh);
PRINT_FLOAT_VALUE(m_selector_rdo_thresh);
PRINT_BOOL_VALUE(m_mip_gen);
PRINT_BOOL_VALUE(m_mip_renormalize);
PRINT_BOOL_VALUE(m_mip_wrapping);
PRINT_BOOL_VALUE(m_mip_srgb);
PRINT_FLOAT_VALUE(m_mip_premultiplied);
PRINT_FLOAT_VALUE(m_mip_scale);
PRINT_INT_VALUE(m_mip_smallest_dimension);
debug_printf("m_mip_filter: %s\n", m_params.m_mip_filter.c_str());
debug_printf("m_max_endpoint_clusters: %u\n", m_params.m_max_endpoint_clusters);
debug_printf("m_max_selector_clusters: %u\n", m_params.m_max_selector_clusters);
debug_printf("m_quality_level: %i\n", m_params.m_quality_level);
debug_printf("m_tex_type: %u\n", m_params.m_tex_type);
debug_printf("m_userdata0: 0x%X, m_userdata1: 0x%X\n", m_params.m_userdata0, m_params.m_userdata1);
debug_printf("m_us_per_frame: %i (%f fps)\n", m_params.m_us_per_frame, m_params.m_us_per_frame ? 1.0f / (m_params.m_us_per_frame / 1000000.0f) : 0);
#undef PRINT_BOOL_VALUE
#undef PRINT_INT_VALUE
#undef PRINT_UINT_VALUE
#undef PRINT_FLOAT_VALUE
}
if ((m_params.m_read_source_images) && (!m_params.m_source_filenames.size()))
{
assert(0);
return false;
}
return true;
}
basis_compressor::error_code basis_compressor::process()
{
debug_printf("basis_compressor::process\n");
if (!read_source_images())
return cECFailedReadingSourceImages;
if (!validate_texture_type_constraints())
return cECFailedValidating;
if (!process_frontend())
return cECFailedFrontEnd;
if (!extract_frontend_texture_data())
return cECFailedFontendExtract;
if (!process_backend())
return cECFailedBackend;
if (!create_basis_file_and_transcode())
return cECFailedCreateBasisFile;
if (!write_output_files_and_compute_stats())
return cECFailedWritingOutput;
return cECSuccess;
}
bool basis_compressor::generate_mipmaps(const image &img, std::vector<image> &mips, bool has_alpha)
{
debug_printf("basis_compressor::generate_mipmaps\n");
uint32_t total_levels = 1;
uint32_t w = img.get_width(), h = img.get_height();
while (maximum<uint32_t>(w, h) > (uint32_t)m_params.m_mip_smallest_dimension)
{
w = maximum(w >> 1U, 1U);
h = maximum(h >> 1U, 1U);
total_levels++;
}
#if BASISU_USE_STB_IMAGE_RESIZE_FOR_MIPMAP_GEN
// Requires stb_image_resize
stbir_filter filter = STBIR_FILTER_DEFAULT;
if (m_params.m_mip_filter == "box")
filter = STBIR_FILTER_BOX;
else if (m_params.m_mip_filter == "triangle")
filter = STBIR_FILTER_TRIANGLE;
else if (m_params.m_mip_filter == "cubic")
filter = STBIR_FILTER_CUBICBSPLINE;
else if (m_params.m_mip_filter == "catmull")
filter = STBIR_FILTER_CATMULLROM;
else if (m_params.m_mip_filter == "mitchell")
filter = STBIR_FILTER_MITCHELL;
for (uint32_t level = 1; level < total_levels; level++)
{
const uint32_t level_width = maximum<uint32_t>(1, img.get_width() >> level);
const uint32_t level_height = maximum<uint32_t>(1, img.get_height() >> level);
image &level_img = *enlarge_vector(mips, 1);
level_img.resize(level_width, level_height);
int result = stbir_resize_uint8_generic(
(const uint8_t *)img.get_ptr(), img.get_width(), img.get_height(), img.get_pitch() * sizeof(color_rgba),
(uint8_t *)level_img.get_ptr(), level_img.get_width(), level_img.get_height(), level_img.get_pitch() * sizeof(color_rgba),
has_alpha ? 4 : 3, has_alpha ? 3 : STBIR_ALPHA_CHANNEL_NONE, m_params.m_mip_premultiplied ? STBIR_FLAG_ALPHA_PREMULTIPLIED : 0,
m_params.m_mip_wrapping ? STBIR_EDGE_WRAP : STBIR_EDGE_CLAMP, filter, m_params.m_mip_srgb ? STBIR_COLORSPACE_SRGB : STBIR_COLORSPACE_LINEAR,
nullptr);
if (result == 0)
{
error_printf("basis_compressor::generate_mipmaps: stbir_resize_uint8_generic() failed!\n");
return false;
}
if (m_params.m_mip_renormalize)
level_img.renormalize_normal_map();
}
#else
for (uint32_t level = 1; level < total_levels; level++)
{
const uint32_t level_width = maximum<uint32_t>(1, img.get_width() >> level);
const uint32_t level_height = maximum<uint32_t>(1, img.get_height() >> level);
image &level_img = *enlarge_vector(mips, 1);
level_img.resize(level_width, level_height);
bool status = image_resample(img, level_img, m_params.m_mip_srgb, m_params.m_mip_filter.c_str(), m_params.m_mip_scale, m_params.m_mip_wrapping, 0, has_alpha ? 4 : 3);
if (!status)
{
error_printf("basis_compressor::generate_mipmaps: image_resample() failed!\n");
return false;
}
if (m_params.m_mip_renormalize)
level_img.renormalize_normal_map();
}
#endif
return true;
}
bool basis_compressor::read_source_images()
{
debug_printf("basis_compressor::read_source_images\n");
const uint32_t total_source_files = m_params.m_read_source_images ? (uint32_t)m_params.m_source_filenames.size() : (uint32_t)m_params.m_source_images.size();
if (!total_source_files)
return false;
m_stats.resize(0);
m_slice_descs.resize(0);
m_slice_images.resize(0);
m_total_blocks = 0;
uint32_t total_macroblocks = 0;
m_any_source_image_has_alpha = false;
std::vector<image> source_images;
std::vector<std::string> source_filenames;
// First load all source images, and determine if any have an alpha channel.
for (uint32_t source_file_index = 0; source_file_index < total_source_files; source_file_index++)
{
const char *pSource_filename = "";
image file_image;
if (m_params.m_read_source_images)
{
pSource_filename = m_params.m_source_filenames[source_file_index].c_str();
// Load the source image
if (!load_png(pSource_filename, file_image))
{
error_printf("Failed reading source image: %s\n", pSource_filename);
return false;
}
printf("Read source image \"%s\", %ux%u\n", pSource_filename, file_image.get_width(), file_image.get_height());
// Optionally load another image and put a grayscale version of it into the alpha channel.
if ((source_file_index < m_params.m_source_alpha_filenames.size()) && (m_params.m_source_alpha_filenames[source_file_index].size()))
{
const char *pSource_alpha_image = m_params.m_source_alpha_filenames[source_file_index].c_str();
image alpha_data;
if (!load_png(pSource_alpha_image, alpha_data))
{
error_printf("Failed reading source image: %s\n", pSource_alpha_image);
return false;
}
printf("Read source alpha image \"%s\", %ux%u\n", pSource_alpha_image, alpha_data.get_width(), alpha_data.get_height());
alpha_data.crop(file_image.get_width(), file_image.get_height());
for (uint32_t y = 0; y < file_image.get_height(); y++)
for (uint32_t x = 0; x < file_image.get_width(); x++)
file_image(x, y).a = (uint8_t)alpha_data(x, y).get_709_luma();
}
}
else
{
file_image = m_params.m_source_images[source_file_index];
}
if (m_params.m_seperate_rg_to_color_alpha)
{
// Used for XY normal maps in RG - puts X in color, Y in alpha
for (uint32_t y = 0; y < file_image.get_height(); y++)
for (uint32_t x = 0; x < file_image.get_width(); x++)
{
const color_rgba &c = file_image(x, y);
file_image(x, y).set_noclamp_rgba(c.r, c.r, c.r, c.g);
}
}
bool has_alpha = false;
if ((m_params.m_force_alpha) || (m_params.m_seperate_rg_to_color_alpha))
has_alpha = true;
else if (!m_params.m_check_for_alpha)
file_image.set_alpha(255);
else if (file_image.has_alpha())
has_alpha = true;
if (has_alpha)
m_any_source_image_has_alpha = true;
debug_printf("Source image index %u filename %s %ux%u has alpha: %u\n", source_file_index, pSource_filename, file_image.get_width(), file_image.get_height(), has_alpha);
if (m_params.m_y_flip)
file_image.flip_y();
#if DEBUG_EXTRACT_SINGLE_BLOCK
image block_image(4, 4);
const uint32_t block_x = 0;
const uint32_t block_y = 0;
block_image.blit(block_x * 4, block_y * 4, 4, 4, 0, 0, file_image, 0);
file_image = block_image;
#endif
#if DEBUG_RESIZE_TEXTURE_TO_64x64
file_image.resize(64, 64);
#endif
if ((!file_image.get_width()) || (!file_image.get_height()))
{
error_printf("basis_compressor::read_source_images: Source image has a zero width and/or height!\n");
return false;
}
if ((file_image.get_width() > BASISU_MAX_SUPPORTED_TEXTURE_DIMENSION) || (file_image.get_height() > BASISU_MAX_SUPPORTED_TEXTURE_DIMENSION))
{
error_printf("basis_compressor::read_source_images: Source image is too large!\n");
return false;
}
source_images.push_back(file_image);
source_filenames.push_back(pSource_filename);
}
debug_printf("Any source image has alpha: %u\n", m_any_source_image_has_alpha);
for (uint32_t source_file_index = 0; source_file_index < total_source_files; source_file_index++)
{
image &file_image = source_images[source_file_index];
const std::string &source_filename = source_filenames[source_file_index];
std::vector<image> slices;
slices.reserve(32);
slices.push_back(file_image);
if (m_params.m_mip_gen)
{
if (!generate_mipmaps(file_image, slices, m_any_source_image_has_alpha))
return false;
}
uint_vec mip_indices(slices.size());
for (uint32_t i = 0; i < slices.size(); i++)
mip_indices[i] = i;
if (m_any_source_image_has_alpha)
{
// If source has alpha, then even mips will have RGB, and odd mips will have alpha in RGB.
std::vector<image> alpha_slices;
uint_vec new_mip_indices;
alpha_slices.reserve(slices.size() * 2);
for (uint32_t i = 0; i < slices.size(); i++)
{
image lvl_rgb(slices[i]);
image lvl_a(lvl_rgb);
for (uint32_t y = 0; y < lvl_a.get_height(); y++)
{
for (uint32_t x = 0; x < lvl_a.get_width(); x++)
{
uint8_t a = lvl_a(x, y).a;
lvl_a(x, y).set_noclamp_rgba(a, a, a, 255);
}
}
lvl_rgb.set_alpha(255);
alpha_slices.push_back(lvl_rgb);
new_mip_indices.push_back(i);
alpha_slices.push_back(lvl_a);
new_mip_indices.push_back(i);
}
slices.swap(alpha_slices);
mip_indices.swap(new_mip_indices);
}
assert(slices.size() == mip_indices.size());
for (uint32_t slice_index = 0; slice_index < slices.size(); slice_index++)
{
const bool is_alpha_slice = m_any_source_image_has_alpha && ((slice_index & 1) != 0);
image &slice_image = slices[slice_index];
const uint32_t orig_width = slice_image.get_width();
const uint32_t orig_height = slice_image.get_height();
// Enlarge the source image to 4x4 block boundaries, duplicating edge pixels if necessary to avoid introducing extra colors into blocks.
slice_image.crop_dup_borders(slice_image.get_block_width(4) * 4, slice_image.get_block_height(4) * 4);
if (m_params.m_debug_images)
{
save_png(string_format("basis_debug_source_image_%u_%u.png", source_file_index, slice_index).c_str(), slice_image);
}
enlarge_vector(m_stats, 1);
enlarge_vector(m_slice_images, 1);
enlarge_vector(m_slice_descs, 1);
const uint32_t dest_image_index = (uint32_t)m_stats.size() - 1;
m_stats[dest_image_index].m_filename = source_filename.c_str();
m_stats[dest_image_index].m_width = orig_width;
m_stats[dest_image_index].m_height = orig_height;
m_slice_images[dest_image_index] = slice_image;
debug_printf("****** Slice %u: mip %u, alpha_slice: %u, filename: \"%s\", original: %ux%u actual: %ux%u\n", m_slice_descs.size() - 1, mip_indices[slice_index], is_alpha_slice, source_filename.c_str(), orig_width, orig_height, slice_image.get_width(), slice_image.get_height());
basisu_backend_slice_desc &slice_desc = m_slice_descs[dest_image_index];
slice_desc.m_first_block_index = m_total_blocks;
slice_desc.m_orig_width = orig_width;
slice_desc.m_orig_height = orig_height;
slice_desc.m_width = slice_image.get_width();
slice_desc.m_height = slice_image.get_height();
slice_desc.m_num_blocks_x = slice_image.get_block_width(4);
slice_desc.m_num_blocks_y = slice_image.get_block_height(4);
slice_desc.m_num_macroblocks_x = (slice_desc.m_num_blocks_x + 1) >> 1;
slice_desc.m_num_macroblocks_y = (slice_desc.m_num_blocks_y + 1) >> 1;
slice_desc.m_source_file_index = source_file_index;
slice_desc.m_mip_index = mip_indices[slice_index];
slice_desc.m_alpha = is_alpha_slice;
m_total_blocks += slice_desc.m_num_blocks_x * slice_desc.m_num_blocks_y;
total_macroblocks += slice_desc.m_num_macroblocks_x * slice_desc.m_num_macroblocks_y;
} // slice_index
} // source_file_index
debug_printf("Total blocks: %u, Total macroblocks: %u\n", m_total_blocks, total_macroblocks);
// Make sure we don't have too many slices
if (m_slice_descs.size() > BASISU_MAX_SLICES)
{
error_printf("Too many slices!\n");
return false;
}
// Basic sanity check on the slices
for (uint32_t i = 1; i < m_slice_descs.size(); i++)
{
const basisu_backend_slice_desc &prev_slice_desc = m_slice_descs[i - 1];
const basisu_backend_slice_desc &slice_desc = m_slice_descs[i];
// Make sure images are in order
int image_delta = (int)slice_desc.m_source_file_index - (int)prev_slice_desc.m_source_file_index;
if (image_delta > 1)
return false;
// Make sure mipmap levels are in order
if (!image_delta)
{
int level_delta = (int)slice_desc.m_mip_index - (int)prev_slice_desc.m_mip_index;
if (level_delta > 1)
return false;
}
}
printf("Total basis file slices: %u\n", (uint32_t)m_slice_descs.size());
for (uint32_t i = 0; i < m_slice_descs.size(); i++)
{
const basisu_backend_slice_desc &slice_desc = m_slice_descs[i];
printf("Slice: %u, alpha: %u, orig width/height: %ux%u, width/height: %ux%u, first_block: %u, image_index: %u, mip_level: %u\n",
i, slice_desc.m_alpha, slice_desc.m_orig_width, slice_desc.m_orig_height, slice_desc.m_width, slice_desc.m_height, slice_desc.m_first_block_index, slice_desc.m_source_file_index, slice_desc.m_mip_index);
if (m_any_source_image_has_alpha)
{
// Alpha slices must be at odd slice indices
if (slice_desc.m_alpha)
{
if ((i & 1) == 0)
return false;
const basisu_backend_slice_desc &prev_slice_desc = m_slice_descs[i - 1];
// Make sure previous slice has this image's color data
if (prev_slice_desc.m_source_file_index != slice_desc.m_source_file_index)
return false;
if (prev_slice_desc.m_alpha)
return false;
if (prev_slice_desc.m_mip_index != slice_desc.m_mip_index)
return false;
if (prev_slice_desc.m_num_blocks_x != slice_desc.m_num_blocks_x)
return false;
if (prev_slice_desc.m_num_blocks_y != slice_desc.m_num_blocks_y)
return false;
}
else if (i & 1)
return false;
}
else if (slice_desc.m_alpha)
{
return false;
}
if ((slice_desc.m_orig_width > slice_desc.m_width) || (slice_desc.m_orig_height > slice_desc.m_height))
return false;
}
return true;
}
// Do some basic validation for 2D arrays, cubemaps, video, and volumes.
bool basis_compressor::validate_texture_type_constraints()
{
debug_printf("basis_compressor::validate_texture_type_constraints\n");
// In 2D mode anything goes (each image may have a different resolution and # of mipmap levels).
if (m_params.m_tex_type == basist::cBASISTexType2D)
return true;
uint32_t total_basis_images = 0;
for (uint32_t slice_index = 0; slice_index < m_slice_images.size(); slice_index++)
{
const basisu_backend_slice_desc &slice_desc = m_slice_descs[slice_index];
total_basis_images = maximum<uint32_t>(total_basis_images, slice_desc.m_source_file_index + 1);
}
if (m_params.m_tex_type == basist::cBASISTexTypeCubemapArray)
{
// For cubemaps, validate that the total # of Basis images is a multiple of 6.
if ((total_basis_images % 6) != 0)
{
error_printf("basis_compressor::validate_texture_type_constraints: For cubemaps the total number of input images is not a multiple of 6!\n");
return false;
}
}
// Now validate that all the mip0's have the same dimensions, and that each image has the same # of mipmap levels.
uint_vec image_mipmap_levels(total_basis_images);
int width = -1, height = -1;
for (uint32_t slice_index = 0; slice_index < m_slice_images.size(); slice_index++)
{
const basisu_backend_slice_desc &slice_desc = m_slice_descs[slice_index];
image_mipmap_levels[slice_desc.m_source_file_index] = maximum(image_mipmap_levels[slice_desc.m_source_file_index], slice_desc.m_mip_index + 1);
if (slice_desc.m_mip_index != 0)
continue;
if (width < 0)
{
width = slice_desc.m_orig_width;
height = slice_desc.m_orig_height;
}
else if ((width != (int)slice_desc.m_orig_width) || (height != (int)slice_desc.m_orig_height))
{
error_printf("basis_compressor::validate_texture_type_constraints: The source image resolutions are not all equal!\n");
return false;
}
}
for (size_t i = 1; i < image_mipmap_levels.size(); i++)
{
if (image_mipmap_levels[0] != image_mipmap_levels[i])
{
error_printf("basis_compressor::validate_texture_type_constraints: Each image must have the same number of mipmap levels!\n");
return false;
}
}
return true;
}
bool basis_compressor::process_frontend()
{
debug_printf("basis_compressor::process_frontend\n");
m_source_blocks.resize(m_total_blocks);
for (uint32_t slice_index = 0; slice_index < m_slice_images.size(); slice_index++)
{
const basisu_backend_slice_desc &slice_desc = m_slice_descs[slice_index];
const uint32_t num_blocks_x = slice_desc.m_num_blocks_x;
const uint32_t num_blocks_y = slice_desc.m_num_blocks_y;
const image &source_image = m_slice_images[slice_index];
for (uint32_t block_y = 0; block_y < num_blocks_y; block_y++)
for (uint32_t block_x = 0; block_x < num_blocks_x; block_x++)
source_image.extract_block_clamped(m_source_blocks[slice_desc.m_first_block_index + block_x + block_y * num_blocks_x].get_ptr(), block_x * 4, block_y * 4, 4, 4);
}
#if 0
// TODO
basis_etc1_pack_params pack_params;
pack_params.m_quality = cETCQualityMedium;
pack_params.m_perceptual = m_params.m_perceptual;
pack_params.m_use_color4 = false;
pack_etc1_block_context pack_context;
std::unordered_set<uint64_t> endpoint_hash;
std::unordered_set<uint32_t> selector_hash;
for (uint32_t i = 0; i < m_source_blocks.size(); i++)
{
etc_block blk;
pack_etc1_block(blk, m_source_blocks[i].get_ptr(), pack_params, pack_context);
const color_rgba c0(blk.get_block_color(0, false));
endpoint_hash.insert((c0.r | (c0.g << 5) | (c0.b << 10)) | (blk.get_inten_table(0) << 16));
const color_rgba c1(blk.get_block_color(1, false));
endpoint_hash.insert((c1.r | (c1.g << 5) | (c1.b << 10)) | (blk.get_inten_table(1) << 16));
selector_hash.insert(blk.get_raw_selector_bits());
}
const uint32_t total_unique_endpoints = (uint32_t)endpoint_hash.size();
const uint32_t total_unique_selectors = (uint32_t)selector_hash.size();
if (m_params.m_debug)
{
debug_printf("Unique endpoints: %u, unique selectors: %u\n", total_unique_endpoints, total_unique_selectors);
}
#endif
const double total_texels = m_total_blocks * 16.0f;
int endpoint_clusters = m_params.m_max_endpoint_clusters;
int selector_clusters = m_params.m_max_selector_clusters;
if (endpoint_clusters > basisu_frontend::cMaxEndpointClusters)
{
error_printf("Too many endpoint clusters! (%u but max is %u)\n", endpoint_clusters, basisu_frontend::cMaxEndpointClusters);
return false;
}
if (selector_clusters > basisu_frontend::cMaxSelectorClusters)
{
error_printf("Too many selector clusters! (%u but max is %u)\n", selector_clusters, basisu_frontend::cMaxSelectorClusters);
return false;
}
if (m_params.m_quality_level != -1)
{
const float quality = saturate(m_params.m_quality_level / 255.0f);
const float bits_per_endpoint_cluster = 14.0f;
const float max_desired_endpoint_cluster_bits_per_texel = 1.0f; // .15f
int max_endpoints = static_cast<int>((max_desired_endpoint_cluster_bits_per_texel * total_texels) / bits_per_endpoint_cluster);
const float mid = 128.0f / 255.0f;
float color_endpoint_quality = quality;
const float endpoint_split_point = 0.5f;
if (color_endpoint_quality <= mid)
{
color_endpoint_quality = lerp(0.0f, endpoint_split_point, powf(color_endpoint_quality / mid, .65f));
max_endpoints = clamp<int>(max_endpoints, 256, 3072);
max_endpoints = minimum<uint32_t>(max_endpoints, m_total_blocks);
if (max_endpoints < 64)
max_endpoints = 64;
endpoint_clusters = clamp<uint32_t>((uint32_t)(.5f + lerp<float>(32, static_cast<float>(max_endpoints), color_endpoint_quality)), 32, basisu_frontend::cMaxEndpointClusters);
}
else
{
color_endpoint_quality = powf((color_endpoint_quality - mid) / (1.0f - mid), 1.6f);
max_endpoints = clamp<int>(max_endpoints, 256, 8192);
max_endpoints = minimum<uint32_t>(max_endpoints, m_total_blocks);
if (max_endpoints < 3072)
max_endpoints = 3072;
endpoint_clusters = clamp<uint32_t>((uint32_t)(.5f + lerp<float>(3072, static_cast<float>(max_endpoints), color_endpoint_quality)), 32, basisu_frontend::cMaxEndpointClusters);
}
float bits_per_selector_cluster = m_params.m_global_sel_pal ? 21.0f : 14.0f;
const float max_desired_selector_cluster_bits_per_texel = 1.0f; // .15f
int max_selectors = static_cast<int>((max_desired_selector_cluster_bits_per_texel * total_texels) / bits_per_selector_cluster);
max_selectors = clamp<int>(max_selectors, 256, basisu_frontend::cMaxSelectorClusters);
max_selectors = minimum<uint32_t>(max_selectors, m_total_blocks);
float color_selector_quality = quality;
//color_selector_quality = powf(color_selector_quality, 1.65f);
color_selector_quality = powf(color_selector_quality, 2.62f);
if (max_selectors < 96)
max_selectors = 96;
selector_clusters = clamp<uint32_t>((uint32_t)(.5f + lerp<float>(96, static_cast<float>(max_selectors), color_selector_quality)), 8, basisu_frontend::cMaxSelectorClusters);
debug_printf("Max endpoints: %u, max selectors: %u\n", endpoint_clusters, selector_clusters);
if (m_params.m_quality_level >= 223)
{
if (!m_params.m_selector_rdo_thresh.was_changed())
{
if (!m_params.m_endpoint_rdo_thresh.was_changed())
m_params.m_endpoint_rdo_thresh *= .25f;
if (!m_params.m_selector_rdo_thresh.was_changed())
m_params.m_selector_rdo_thresh *= .25f;
}
}
else if (m_params.m_quality_level >= 192)
{
if (!m_params.m_endpoint_rdo_thresh.was_changed())
m_params.m_endpoint_rdo_thresh *= .5f;
if (!m_params.m_selector_rdo_thresh.was_changed())
m_params.m_selector_rdo_thresh *= .5f;
}
else if (m_params.m_quality_level >= 160)
{
if (!m_params.m_endpoint_rdo_thresh.was_changed())
m_params.m_endpoint_rdo_thresh *= .75f;
if (!m_params.m_selector_rdo_thresh.was_changed())
m_params.m_selector_rdo_thresh *= .75f;
}
else if (m_params.m_quality_level >= 129)
{
float l = (quality - 129 / 255.0f) / ((160 - 129) / 255.0f);
if (!m_params.m_endpoint_rdo_thresh.was_changed())
m_params.m_endpoint_rdo_thresh *= lerp<float>(1.0f, .75f, l);
if (!m_params.m_selector_rdo_thresh.was_changed())
m_params.m_selector_rdo_thresh *= lerp<float>(1.0f, .75f, l);
}
}
m_auto_global_sel_pal = false;
if (!m_params.m_global_sel_pal && !m_params.m_no_auto_global_sel_pal)
{
const float bits_per_selector_cluster = 31.0f;
double selector_codebook_bpp_est = (bits_per_selector_cluster * selector_clusters) / total_texels;
debug_printf("selector_codebook_bpp_est: %f\n", selector_codebook_bpp_est);
const float force_global_sel_pal_bpp_threshold = .15f;
if ((total_texels <= 128.0f*128.0f) && (selector_codebook_bpp_est > force_global_sel_pal_bpp_threshold))
{
m_auto_global_sel_pal = true;
debug_printf("Auto global selector palette enabled\n");
}
}
basisu_frontend::params p;
p.m_num_source_blocks = m_total_blocks;
p.m_pSource_blocks = &m_source_blocks[0];
p.m_max_endpoint_clusters = endpoint_clusters;
p.m_max_selector_clusters = selector_clusters;
p.m_perceptual = m_params.m_perceptual;
p.m_endpoint_refinement = !m_params.m_no_endpoint_refinement;
p.m_debug_stats = m_params.m_debug;
p.m_debug_images = m_params.m_debug_images;
p.m_faster = m_params.m_faster;
if ((m_params.m_global_sel_pal) || (m_auto_global_sel_pal))
{
p.m_pGlobal_sel_codebook = m_params.m_pSel_codebook;
p.m_num_global_sel_codebook_pal_bits = m_params.m_global_pal_bits;
p.m_num_global_sel_codebook_mod_bits = m_params.m_global_mod_bits;
p.m_use_hybrid_selector_codebooks = !m_params.m_no_hybrid_sel_cb;
p.m_hybrid_codebook_quality_thresh = m_params.m_hybrid_sel_cb_quality_thresh;
}
if (!m_frontend.init(p))
{
error_printf("basisu_frontend::init() failed!\n");
return false;
}
m_frontend.compress();
if (m_params.m_debug_images)
{
for (uint32_t i = 0; i < m_slice_descs.size(); i++)
{
char filename[1024];
#ifdef _WIN32
sprintf_s(filename, sizeof(filename), "rdo_frontend_output_output_blocks_%u.png", i);
#else
snprintf(filename, sizeof(filename), "rdo_frontend_output_output_blocks_%u.png", i);
#endif
m_frontend.dump_debug_image(filename, m_slice_descs[i].m_first_block_index, m_slice_descs[i].m_num_blocks_x, m_slice_descs[i].m_num_blocks_y, true);
#ifdef _WIN32
sprintf_s(filename, sizeof(filename), "rdo_frontend_output_api_%u.png", i);
#else
snprintf(filename, sizeof(filename), "rdo_frontend_output_api_%u.png", i);
#endif
m_frontend.dump_debug_image(filename, m_slice_descs[i].m_first_block_index, m_slice_descs[i].m_num_blocks_x, m_slice_descs[i].m_num_blocks_y, false);
}
}
return true;
}
bool basis_compressor::extract_frontend_texture_data()
{
debug_printf("basis_compressor::extract_frontend_texture_data\n");
m_frontend_output_textures.resize(m_slice_descs.size());
m_best_etc1s_images.resize(m_slice_descs.size());
m_best_etc1s_images_unpacked.resize(m_slice_descs.size());
for (uint32_t i = 0; i < m_slice_descs.size(); i++)
{
const basisu_backend_slice_desc &slice_desc = m_slice_descs[i];
const uint32_t num_blocks_x = slice_desc.m_num_blocks_x;
const uint32_t num_blocks_y = slice_desc.m_num_blocks_y;
const uint32_t width = num_blocks_x * 4;
const uint32_t height = num_blocks_y * 4;
m_frontend_output_textures[i].init(cETC1, width, height);
for (uint32_t block_y = 0; block_y < num_blocks_y; block_y++)
for (uint32_t block_x = 0; block_x < num_blocks_x; block_x++)
memcpy(m_frontend_output_textures[i].get_block_ptr(block_x, block_y, 0), &m_frontend.get_output_block(slice_desc.m_first_block_index + block_x + block_y * num_blocks_x), sizeof(etc_block));
#if 0
if (m_params.m_debug_images)
{
char filename[1024];
sprintf_s(filename, sizeof(filename), "rdo_etc_frontend_%u_", i);
write_etc1_vis_images(m_frontend_output_textures[i], filename);
}
#endif
m_best_etc1s_images[i].init(cETC1, width, height);
for (uint32_t block_y = 0; block_y < num_blocks_y; block_y++)
for (uint32_t block_x = 0; block_x < num_blocks_x; block_x++)
memcpy(m_best_etc1s_images[i].get_block_ptr(block_x, block_y, 0), &m_frontend.get_etc1s_block(slice_desc.m_first_block_index + block_x + block_y * num_blocks_x), sizeof(etc_block));
m_best_etc1s_images[i].unpack(m_best_etc1s_images_unpacked[i]);
}
return true;
}
bool basis_compressor::process_backend()
{
debug_printf("basis_compressor::process_backend\n");
basisu_backend_params backend_params;
backend_params.m_debug = m_params.m_debug;
backend_params.m_debug_images = m_params.m_debug_images;
backend_params.m_etc1s = true;
if (!m_params.m_no_endpoint_rdo)
backend_params.m_endpoint_rdo_quality_thresh = m_params.m_endpoint_rdo_thresh;
if (!m_params.m_no_selector_rdo)
backend_params.m_selector_rdo_quality_thresh = m_params.m_selector_rdo_thresh;
backend_params.m_use_global_sel_codebook = (m_frontend.get_params().m_pGlobal_sel_codebook != NULL);
backend_params.m_global_sel_codebook_pal_bits = m_frontend.get_params().m_num_global_sel_codebook_pal_bits;
backend_params.m_global_sel_codebook_mod_bits = m_frontend.get_params().m_num_global_sel_codebook_mod_bits;
backend_params.m_use_hybrid_sel_codebooks = m_frontend.get_params().m_use_hybrid_selector_codebooks;
m_backend.init(&m_frontend, backend_params, m_slice_descs, m_params.m_pSel_codebook);
uint32_t total_packed_bytes = m_backend.encode();
if (!total_packed_bytes)
{
error_printf("basis_compressor::encode() failed!\n");
return false;
}
debug_printf("Total packed bytes (estimated): %u\n", total_packed_bytes);
return true;
}
bool basis_compressor::create_basis_file_and_transcode()
{
debug_printf("basis_compressor::create_basis_file_and_transcode\n");
const basisu_backend_output &encoded_output = m_backend.get_output();
if (!m_basis_file.init(encoded_output, m_params.m_tex_type, m_params.m_userdata0, m_params.m_userdata1, m_params.m_y_flip, m_params.m_us_per_frame))
{
error_printf("basis_compressor::write_output_files_and_compute_stats: basisu_backend:init() failed!\n");
return false;
}
const uint8_vec &comp_data = m_basis_file.get_compressed_data();
m_output_basis_file = comp_data;
// Verify the compressed data by transcoding it to ETC1/BC1 and validating the CRC's.
basist::basisu_transcoder decoder(m_params.m_pSel_codebook);
if (!decoder.validate_file_checksums(&comp_data[0], (uint32_t)comp_data.size(), true))
{
error_printf("decoder.validate_file_checksums() failed!\n");
return false;
}
m_decoded_output_textures.resize(m_slice_descs.size());
m_decoded_output_textures_unpacked.resize(m_slice_descs.size());
m_decoded_output_textures_bc1.resize(m_slice_descs.size());
m_decoded_output_textures_unpacked_bc1.resize(m_slice_descs.size());
interval_timer tm;
tm.start();
if (!decoder.start_transcoding(&comp_data[0], (uint32_t)comp_data.size()))
{
error_printf("decoder.start_transcoding() failed!\n");
return false;
}
debug_printf("basisu_comppressor::start_transcoding() took %3.3fms\n", tm.get_elapsed_ms());
uint32_t total_orig_pixels = 0;
uint32_t total_texels = 0;
double total_time_etc1 = 0;
for (uint32_t i = 0; i < m_slice_descs.size(); i++)
{
gpu_image decoded_texture;
decoded_texture.init(cETC1, m_slice_descs[i].m_width, m_slice_descs[i].m_height);
tm.start();
if (!decoder.transcode_slice(&comp_data[0], (uint32_t)comp_data.size(), i,
reinterpret_cast<etc_block *>(decoded_texture.get_ptr()), m_slice_descs[i].m_num_blocks_x * m_slice_descs[i].m_num_blocks_y, basist::cETC1, 8))
{
error_printf("Transcoding failed to ETC1 on slice %u!\n", i);
return false;
}
total_time_etc1 += tm.get_elapsed_secs();
uint32_t image_crc16 = basist::crc16(decoded_texture.get_ptr(), decoded_texture.get_size_in_bytes(), 0);
if (image_crc16 != m_backend.get_output().m_slice_image_crcs[i])
{
error_printf("Decoded image data CRC check failed on slice %u!\n", i);
return false;
}
debug_printf("Decoded image data CRC check succeeded on slice %i\n", i);
m_decoded_output_textures[i] = decoded_texture;
total_orig_pixels += m_slice_descs[i].m_orig_width * m_slice_descs[i].m_orig_height;
total_texels += m_slice_descs[i].m_width * m_slice_descs[i].m_height;
}
tm.start();
basist::basisu_transcoder_init();
debug_printf("basist::basisu_transcoder_init: Took %f ms\n", tm.get_elapsed_ms());
double total_time_bc1 = 0;
for (uint32_t i = 0; i < m_slice_descs.size(); i++)
{
gpu_image decoded_texture;
decoded_texture.init(cBC1, m_slice_descs[i].m_width, m_slice_descs[i].m_height);
tm.start();
if (!decoder.transcode_slice(&comp_data[0], (uint32_t)comp_data.size(), i,
reinterpret_cast<etc_block *>(decoded_texture.get_ptr()), m_slice_descs[i].m_num_blocks_x * m_slice_descs[i].m_num_blocks_y, basist::cBC1, 8))
{
error_printf("Transcoding failed to BC1 on slice %u!\n", i);
return false;
}