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Adding custom mipmap/texarray example

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This commit is contained in:
Richard Geldreich
2026-03-01 11:07:13 -05:00
parent 75a08c483a
commit 922d79fadc
1 changed files with 86 additions and 1 deletions
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87
example/example.cpp
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@@ -1649,11 +1649,93 @@ static bool test_compress_xuastc_ldr_texture_video()
return true;
}
static bool test_compress_uastc_hdr_6x6i_array_custom_mipmap()
{
printf("test_compress_uastc_hdr_6x6i_array_custom_mipmap:\n");
const uint32_t ARRAY_SIZE = 2;
const uint32_t W = 384, H = 256;
basis_compressor_params params;
// Set the format to UASTC HDR 6x6i using the recommended unified method.
params.set_format_mode_and_quality_effort(basist::basis_tex_format::cUASTC_HDR_6x6_INTERMEDIATE, 75, 3);
// Input is sRGB
params.set_srgb_options(true);
// Create the array slices
for (uint32_t array_index = 0; array_index < ARRAY_SIZE; array_index++)
{
int cur_w = W, cur_h = H;
int mip_index = 0;
// Create the mipmaps
params.m_source_images_hdr.enlarge(1);
params.m_source_mipmap_images_hdr.enlarge(1);
do
{
image img(cur_w, cur_h);
img.debug_text(0, 10, 1, 1, g_white_color, &g_black_color, false, fmt_string("{} {} {}x{}", array_index, mip_index, cur_w, cur_h).c_str());
// Upconvert LDR to HDR
imagef hdr_img;
convert_ldr_to_hdr_image(hdr_img, img, true, 100.0f, 0.0f);
// Add the source image for this mip level. The first mip level goes in m_source_images, and the remaining mip levels go in m_source_mipmap_images.
if (!mip_index)
params.m_source_images_hdr[array_index] = hdr_img;
else
params.m_source_mipmap_images_hdr[array_index].push_back(hdr_img);
++mip_index;
cur_w = maximum(1, cur_w / 2);
cur_h = maximum(1, cur_h / 2);
} while ((cur_w > 1) || (cur_h > 1));
} // array_index
// Enable debug/status output and statistics.
params.m_debug = true;
params.m_status_output = true;
params.m_compute_stats = true;
// Set the texture type to video frames, which will cause the compressor to treat the images as a texture video sequence (using skip blocks).
params.m_tex_type = basist::basis_texture_type::cBASISTexType2DArray;
// Write a .ktx2 file to disk.
params.m_create_ktx2_file = true;
params.m_write_output_basis_or_ktx2_files = true;
params.m_out_filename = "test_uastc_hdr_6x6i_array_custom_mips.ktx2";
// Create a job pool. A job pool MUST always be created, even if threading is disabled.
// num_total_threads is the TOTAL thread count: 1 = calling thread only, 7 = calling thread + 6 extra.
const uint32_t NUM_THREADS = 7;
job_pool jp(NUM_THREADS);
params.m_pJob_pool = &jp;
params.m_multithreading = true;
// Initialize and run the compressor.
basis_compressor comp;
if (!comp.init(params))
return false;
basisu::basis_compressor::error_code ec = comp.process();
if (ec != basisu::basis_compressor::cECSuccess)
return false;
return true;
}
static bool lowlevel_compression_tests()
{
// basisu_encoder_init() MUST have been called before this point.
basisu_encoder_init();
if (!test_compress_etc1s())
return false;
@@ -1681,6 +1763,9 @@ static bool lowlevel_compression_tests()
if (!test_compress_xuastc_ldr_texture_video())
return false;
if (!test_compress_uastc_hdr_6x6i_array_custom_mipmap())
return false;
printf("lowlevel_compression_tests: Compression OK\n");
return true;