diff --git a/contrib/.gitignore b/contrib/.gitignore new file mode 100644 index 0000000..61937bd --- /dev/null +++ b/contrib/.gitignore @@ -0,0 +1,2 @@ +# Mac finder +.DS_Store diff --git a/contrib/single_file_transcoder/.gitignore b/contrib/single_file_transcoder/.gitignore new file mode 100644 index 0000000..b16a751 --- /dev/null +++ b/contrib/single_file_transcoder/.gitignore @@ -0,0 +1,2 @@ +# Don't commit the generated lib +basisutranslib.cpp diff --git a/contrib/single_file_transcoder/basisutranslib-in.cpp b/contrib/single_file_transcoder/basisutranslib-in.cpp new file mode 100644 index 0000000..0595f10 --- /dev/null +++ b/contrib/single_file_transcoder/basisutranslib-in.cpp @@ -0,0 +1,12 @@ +/** + * Basis Universal single file library. Generated using: + * \code + * ./combine.sh -r ../../transcoder -o basisutranslib.cpp basisutranslib-in.cpp + * \endcode + * We can add any build options here, e.g.: + * \code + * #define BASISD_SUPPORT_BC7 0 + * \endcode + */ + +#include "basisu_transcoder.cpp" diff --git a/contrib/single_file_transcoder/combine.sh b/contrib/single_file_transcoder/combine.sh new file mode 100755 index 0000000..00b7b26 --- /dev/null +++ b/contrib/single_file_transcoder/combine.sh @@ -0,0 +1,124 @@ +#!/bin/sh -e + +# Tool to bundle multiple C/C++ source files, inlining any includes. +# +# Note: this POSIX-compliant script is many times slower than the original bash +# implementation (due to the grep calls) but it runs and works everywhere. +# +# TODO: ROOTS and FOUND as arrays (since they fail on paths with spaces) +# +# Released under a CC0 license. + +# Common file roots +ROOTS="./" + +# Files previously visited +FOUND="" + +# Optional destination file (empty string to write to stdout) +DESTN="" + +# Prints the script usage then exits +usage() { + echo "Usage: $0 [-r ] [-o ] infile" + echo " -r file root search paths" + echo " -o output file (otherwise stdout)" + echo "Example: $0 -r ../my/path - r ../other/path -o out.c in.c" + exit 1 +} + +# Tests that the grep implementation works as expected (older OSX grep fails) +test_grep() { + if ! echo '#include "foo"' | grep -Eq '^\s*#\s*include\s*".+"'; then + echo "Aborting: the grep implementation fails to parse include lines" + exit 1 + fi +} + +# Tests if list $1 has item $2 (returning zero on a match) +list_has_item() { + if echo "$1" | grep -Eq "(^|\s*)$2(\$|\s*)"; then + return 0 + else + return 1 + fi +} + +# Adds a new line with the supplied arguments to $DESTN (or stdout) +write_line() { + if [ -n "$DESTN" ]; then + printf '%s\n' "$@" >> "$DESTN" + else + printf '%s\n' "$@" + fi +} + +# Adds the contents of $1 with any of its includes inlined +add_file() { + # Match the path + local file= + if [ -f "$1" ]; then + file="$1" + else + for root in $ROOTS; do + if test -f "$root/$1"; then + file="$root/$1" + fi + done + fi + if [ -n "$file" ]; then + # Read the file + local line= + while IFS= read -r line; do + if echo "$line" | grep -Eq '^\s*#\s*include\s*".+"'; then + # We have an include directive so strip the (first) file + local inc=$(echo "$line" | grep -Eo '".*"' | grep -Eo '\w*(\.?\w+)+' | head -1) + if ! list_has_item "$FOUND" "$inc"; then + # And we've not previously encountered it + FOUND="$FOUND $inc" + write_line "/**** start inlining $inc ****/" + add_file "$inc" + write_line "/**** ended inlining $inc ****/" + else + write_line "/**** skipping file: $inc ****/" + fi + else + # Otherwise write the source line + write_line "$line" + fi + done < "$file" + else + write_line "#error Unable to find \"$1\"" + fi +} + +while getopts ":r:o:" opts; do + case $opts in + r) + ROOTS="$OPTARG $ROOTS" + ;; + o) + DESTN="$OPTARG" + ;; + *) + usage + ;; + esac +done +shift $((OPTIND-1)) + +if [ -n "$1" ]; then + if [ -f "$1" ]; then + if [ -n "$DESTN" ]; then + printf "" > "$DESTN" + fi + test_grep + add_file $1 + else + echo "Input file not found: \"$1\"" + exit 1 + fi +else + usage +fi +exit 0 diff --git a/contrib/single_file_transcoder/create_transcoder.sh b/contrib/single_file_transcoder/create_transcoder.sh new file mode 100755 index 0000000..8033017 --- /dev/null +++ b/contrib/single_file_transcoder/create_transcoder.sh @@ -0,0 +1,10 @@ +#!/bin/sh + +echo "Amalgamating files... this can take a while" +./combine.sh -r "../../transcoder" -o basisutranslib.cpp basisutranslib-in.cpp +# Did combining work? +if [ $? -ne 0 ]; then + echo "Combine script: FAILED" + exit 1 +fi +echo "Combine script: PASSED" diff --git a/contrib/single_file_transcoder/examples/emscripten.cpp b/contrib/single_file_transcoder/examples/emscripten.cpp new file mode 100644 index 0000000..be957c0 --- /dev/null +++ b/contrib/single_file_transcoder/examples/emscripten.cpp @@ -0,0 +1,668 @@ +/** + * \file emscripten.c + * Emscripten example of using the single-file \c zstddeclib. Draws a rotating + * textured quad with data from the in-line Zstd compressed DXT1 texture (DXT1 + * being hardware compression, further compressed with Zstd). + * \n + * Compile using: + * \code + * export CC_FLAGS="-Wall -Wextra -Werror -Os -g0 -flto --llvm-lto 3 -fno-exceptions -fno-rtti -lGL -DNDEBUG=1" + * export EM_FLAGS="-s ENVIRONMENT=web -s WASM=1 --shell-file shell.html --closure 1" + * emcc $CC_FLAGS $EM_FLAGS -o out.html emscripten.cpp + * \endcode + */ + +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include "../basisutranslib.cpp" + +using namespace basist; + +static etc1_global_selector_codebook* globalCodebook = NULL; + +//************************* Test Data (DXT texture) **************************/ + +/** + * Basis Universal compressed 256x256 texture source. + * \n + * See \c testcard.png for the original. + */ +static uint8_t const srcBasis[] = { + 0x73, 0x42, 0x13, 0x00, 0x4d, 0x00, 0x66, 0xbb, 0x6c, 0x0d, 0x00, 0x00, + 0x1f, 0x4f, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x84, 0x00, 0x64, 0x00, 0x00, 0x00, 0x35, 0x01, 0x00, + 0x01, 0x01, 0x99, 0x01, 0x00, 0x00, 0x94, 0x02, 0x00, 0x2d, 0x04, 0x00, + 0x00, 0xb8, 0x00, 0x00, 0x00, 0x4d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x01, 0x40, 0x00, 0x40, 0x00, 0xe5, 0x04, 0x00, 0x00, 0xd4, 0x08, + 0x00, 0x00, 0x06, 0xda, 0x20, 0x40, 0x2c, 0x80, 0x41, 0x10, 0x04, 0xa0, + 0xe0, 0x3d, 0xd2, 0x45, 0x5b, 0x53, 0x26, 0x35, 0xe1, 0x43, 0x0e, 0x04, + 0x78, 0x04, 0x30, 0x0c, 0x82, 0x30, 0xf0, 0x4a, 0xa1, 0x08, 0xb5, 0x91, + 0x2c, 0xd3, 0x3d, 0x86, 0x3d, 0x10, 0xe0, 0x01, 0x00, 0x31, 0x08, 0x82, + 0xc0, 0x67, 0xe6, 0x46, 0xe7, 0x6e, 0xab, 0x4e, 0x0a, 0x11, 0x01, 0x01, + 0x98, 0x00, 0x00, 0x00, 0x80, 0x20, 0x08, 0x80, 0xf0, 0x3a, 0xbd, 0x01, + 0x1d, 0x80, 0x5d, 0x3d, 0xb3, 0xea, 0x60, 0x61, 0x0c, 0x6d, 0xf0, 0xfe, + 0x7b, 0xd1, 0xae, 0x13, 0xc8, 0xd0, 0x2c, 0x00, 0x90, 0x48, 0xa2, 0x01, + 0x12, 0x24, 0xc8, 0x40, 0xa9, 0x3a, 0x4d, 0x84, 0x80, 0x34, 0x01, 0x69, + 0x02, 0x92, 0xa4, 0x0b, 0x48, 0x8d, 0x2e, 0x09, 0xd5, 0xf5, 0xd7, 0x3d, + 0x9e, 0x86, 0xf4, 0x7c, 0xea, 0x7d, 0x7d, 0x26, 0xd7, 0x51, 0x9a, 0x7f, + 0x8c, 0x1e, 0x92, 0xb7, 0xf3, 0x5c, 0x36, 0x1f, 0xfe, 0x3e, 0x37, 0xd7, + 0x7f, 0x6f, 0x7d, 0xe6, 0x6c, 0x47, 0xcc, 0xec, 0xf6, 0xde, 0x2f, 0x22, + 0x56, 0x44, 0x26, 0x6a, 0x7f, 0x0f, 0x96, 0x31, 0x46, 0xdd, 0xbd, 0x11, + 0xf1, 0x55, 0xf5, 0xcc, 0x2c, 0xee, 0x4e, 0x0d, 0x33, 0x6f, 0xef, 0x7d, + 0xa4, 0x3b, 0x95, 0xeb, 0x66, 0xfc, 0xce, 0x06, 0x96, 0xca, 0x74, 0xee, + 0x5f, 0xd4, 0xdd, 0x5e, 0xcf, 0x43, 0x5f, 0xaf, 0x8c, 0x2f, 0xe1, 0x41, + 0x70, 0x7d, 0xd1, 0x46, 0x0e, 0x54, 0x3d, 0x80, 0xe6, 0xd2, 0xcd, 0x5f, + 0x5c, 0xa7, 0xd4, 0x5b, 0x36, 0xb2, 0x8d, 0xd6, 0xc0, 0x42, 0x04, 0x84, + 0xa0, 0xbc, 0x65, 0x4d, 0x01, 0x6c, 0x87, 0xed, 0x15, 0x79, 0x67, 0x6d, + 0x21, 0x4a, 0x42, 0x48, 0x51, 0x9f, 0xbb, 0xda, 0xd5, 0xa1, 0x8f, 0xda, + 0x8c, 0xdc, 0x9a, 0xf3, 0xf4, 0x91, 0xfd, 0x13, 0xb4, 0x5e, 0x59, 0x3f, + 0x05, 0xcc, 0x6c, 0xbf, 0xb7, 0xab, 0xd6, 0xb6, 0xfc, 0xe7, 0xac, 0xd6, + 0xfa, 0xd3, 0x6c, 0xcc, 0xea, 0xce, 0xd6, 0x14, 0xa2, 0x53, 0x66, 0x5c, + 0x2b, 0xaa, 0x65, 0xa3, 0x35, 0x85, 0x84, 0xbc, 0x81, 0x81, 0x07, 0x03, + 0xc3, 0x00, 0x17, 0xfb, 0x27, 0x04, 0x2d, 0x29, 0x08, 0x04, 0xa2, 0xaf, + 0x08, 0xe8, 0x07, 0xe6, 0x7c, 0x68, 0x5d, 0x55, 0x00, 0x00, 0xf0, 0xdf, + 0x39, 0xf7, 0xdc, 0x98, 0xbc, 0xde, 0xd0, 0x93, 0xf8, 0x1a, 0xd2, 0x36, + 0x94, 0x4b, 0x9a, 0xea, 0x1b, 0x32, 0x44, 0x5d, 0x02, 0x2e, 0xe7, 0x41, + 0x28, 0x56, 0x29, 0xbe, 0x42, 0xaa, 0x05, 0x97, 0xe2, 0x1f, 0x70, 0x10, + 0xb4, 0xe8, 0x07, 0xb8, 0x14, 0x87, 0x20, 0x0e, 0xef, 0x49, 0xad, 0x28, + 0x1d, 0x9e, 0xd0, 0x21, 0x64, 0x2a, 0x74, 0xe9, 0x78, 0x5b, 0x45, 0xc4, + 0x0e, 0x16, 0xfa, 0x05, 0x1e, 0xba, 0x74, 0xec, 0x07, 0xa8, 0xba, 0xaa, + 0xaa, 0x6a, 0x01, 0x0a, 0xc6, 0x21, 0x04, 0x29, 0xa5, 0x94, 0x73, 0xce, + 0xa5, 0x94, 0x32, 0x18, 0x0c, 0x06, 0x6d, 0xdb, 0xb6, 0x7b, 0x38, 0x07, + 0x5d, 0xd7, 0xa1, 0x12, 0x63, 0x38, 0x06, 0x8e, 0x63, 0x8c, 0x2a, 0xe0, + 0x24, 0x20, 0x02, 0x11, 0x41, 0x45, 0xa4, 0x8a, 0x2a, 0x15, 0x50, 0x35, + 0x68, 0x34, 0x68, 0x9a, 0xa6, 0x81, 0x06, 0x9a, 0x10, 0xea, 0x95, 0x94, + 0x52, 0x9a, 0x4f, 0xca, 0x97, 0x1a, 0x73, 0x6e, 0x14, 0xca, 0x33, 0x85, + 0x3b, 0x18, 0x15, 0x0a, 0x29, 0x06, 0x42, 0x8c, 0x89, 0x00, 0x01, 0x31, + 0x22, 0x40, 0x20, 0xc5, 0x18, 0x08, 0x31, 0x51, 0xba, 0xa2, 0x74, 0xa5, + 0x74, 0x78, 0x81, 0x3b, 0x14, 0xb5, 0x40, 0xa8, 0xfc, 0x14, 0x83, 0x9f, + 0x11, 0x14, 0x18, 0x33, 0x9e, 0x12, 0xc6, 0x3c, 0x0b, 0x4a, 0xbe, 0x50, + 0xba, 0x4c, 0x29, 0xb9, 0xcd, 0xb9, 0xcd, 0xa5, 0x90, 0xbb, 0x32, 0x2f, + 0x85, 0x9e, 0x0c, 0x85, 0x5e, 0xe9, 0x91, 0xe9, 0x9d, 0xe8, 0xca, 0x75, + 0x60, 0xa6, 0x08, 0x63, 0x4c, 0xc7, 0x8c, 0x03, 0xe1, 0x19, 0xb3, 0x49, + 0x41, 0x37, 0x55, 0x4c, 0x64, 0xd4, 0x18, 0x22, 0x08, 0x3b, 0x84, 0xb3, + 0x81, 0x18, 0xec, 0x70, 0x1e, 0x5b, 0x2b, 0x2c, 0xad, 0x13, 0x04, 0x04, + 0x19, 0x35, 0xce, 0xec, 0x10, 0xce, 0xee, 0x08, 0xd1, 0x79, 0x56, 0xb6, + 0x58, 0xaf, 0xab, 0xe8, 0x9a, 0xf1, 0x3d, 0xa5, 0x6f, 0x73, 0x6e, 0xfb, + 0xe2, 0xde, 0xd8, 0x35, 0xeb, 0xbb, 0xd1, 0xde, 0xe9, 0x96, 0xf9, 0xc2, + 0x42, 0x67, 0xda, 0x71, 0x30, 0x3c, 0x14, 0x42, 0x80, 0x73, 0x5d, 0xd7, + 0xed, 0xa1, 0x74, 0xf4, 0x05, 0x5d, 0x29, 0x25, 0xe7, 0x9c, 0xa5, 0x04, + 0x69, 0x10, 0x85, 0xed, 0x14, 0xb4, 0xa2, 0x4b, 0x83, 0x10, 0x84, 0xc1, + 0xd2, 0x1e, 0xab, 0x6b, 0xd6, 0xb6, 0x2b, 0xb6, 0xd4, 0xc3, 0xdd, 0x55, + 0xf6, 0x92, 0x9d, 0xf7, 0xea, 0xba, 0x91, 0x62, 0x7e, 0xb0, 0xbc, 0x7e, + 0x60, 0x25, 0xa4, 0x49, 0x8c, 0x5d, 0xef, 0xd6, 0xe7, 0x65, 0x66, 0xc6, + 0xf3, 0x25, 0xed, 0x9c, 0x0f, 0x09, 0x47, 0x51, 0x3c, 0xda, 0x94, 0xd4, + 0x29, 0xa8, 0x82, 0xeb, 0x95, 0xe4, 0x90, 0xe3, 0x43, 0xc7, 0x1c, 0xaa, + 0xe2, 0x47, 0x66, 0x58, 0xfb, 0x75, 0xea, 0xf1, 0x95, 0xc5, 0xed, 0x07, + 0x6d, 0xf7, 0xf7, 0xe9, 0x9c, 0x59, 0xcc, 0xb9, 0xf9, 0xcd, 0x9f, 0x5e, + 0x96, 0xec, 0xe0, 0xfe, 0x62, 0x7f, 0xa5, 0x4d, 0xfb, 0x7d, 0xc7, 0x46, + 0xc3, 0xd3, 0x5f, 0x68, 0xde, 0x78, 0xfd, 0x9d, 0x5a, 0x3d, 0x60, 0x70, + 0x61, 0xad, 0x36, 0x1c, 0x0e, 0x87, 0x17, 0xb7, 0x36, 0xdf, 0xcc, 0x39, + 0xe7, 0xa7, 0x0f, 0x4a, 0xce, 0xe5, 0xa5, 0xcc, 0xd7, 0xa3, 0xd4, 0x4f, + 0x62, 0xd7, 0xf6, 0xa1, 0xaa, 0xaa, 0xcd, 0xa6, 0x97, 0x92, 0x57, 0xd3, + 0xfb, 0x45, 0xb9, 0xc1, 0x6e, 0x51, 0x0a, 0xe5, 0x51, 0x4a, 0x92, 0xcd, + 0xa3, 0x28, 0x1e, 0x05, 0x3e, 0x60, 0xbe, 0x63, 0xe9, 0x39, 0x33, 0xb3, + 0xd1, 0xd1, 0xa7, 0xcb, 0x5b, 0x54, 0x07, 0x96, 0x96, 0xe7, 0xbb, 0x28, + 0x1b, 0xcb, 0xb9, 0x0f, 0xab, 0x5d, 0x89, 0x4b, 0x53, 0x4f, 0xfe, 0xd2, + 0xf5, 0xfb, 0x9a, 0x0d, 0xff, 0x7f, 0x96, 0xe4, 0xd1, 0xae, 0xed, 0xfd, + 0x4f, 0x84, 0x53, 0x4f, 0x70, 0x86, 0x8d, 0xcb, 0x3c, 0x7c, 0xe8, 0x8f, + 0xaf, 0xee, 0xba, 0x73, 0xf7, 0xf7, 0xf7, 0xe3, 0xe0, 0xdd, 0xff, 0x16, + 0xa3, 0x65, 0x45, 0x1d, 0x06, 0xf5, 0xe4, 0x63, 0x4f, 0x4e, 0x05, 0x67, + 0x70, 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0x66, 0xd4, 0xaa, 0x42, 0xf5, 0x6c, 0xba, 0xf8, 0x4f, 0x7f, 0x0d, + 0x5a, 0x25, 0x54, 0x95, 0x0f, 0x20, 0x66, 0x11, 0xd0, 0xaa, 0x42, 0xb5, + 0x82, 0x7d, 0xf9, 0xc1, 0xcb, 0xd3, 0xb7, 0x4a, 0xa8, 0x2a, 0xb3, 0x9e, + 0x4a, 0x3f, 0x89, 0x1f, 0xed, 0xc1, 0x6c, 0x4a, 0x31, 0xf9, 0xaf, 0xa8, + 0xc4, 0x9b, 0x0b, 0x7a, 0x9f, 0x73, 0x0a, 0x2a, 0x81, 0x0d, 0x6a, 0x59, + 0xb2, 0x4d, 0xaa, 0xbe, 0x7b, 0xe4, 0x9e, 0xb5, 0x44, 0x52, 0xfc, 0xf8, + 0x80, 0x4d, 0x7a, 0x99, 0xc3, 0xe4, 0x61, 0x7a, 0xc1, 0x58, 0xb2, 0x33, + 0x47, 0x35, 0x27, 0xfd, 0x7e, 0x7d, 0xa9, 0xfb, 0x1f, 0x7c, 0xec, 0xa5, + 0x42, 0xa9, 0x6e, 0x8c, 0x34, 0xdb, 0xcb, 0x66, 0x8b, 0xd7, 0x97, 0xe4, + 0xcb, 0xd5, 0xea, 0xde, 0x82, 0xfc, 0x04, 0x12, 0xd9, 0xab, 0xa8, 0x1c, + 0x7f, 0xb5, 0x0f, 0x54, 0x44, 0x85, 0xa4, 0x56, 0x08, 0x15, 0x55, 0x2f, + 0x5c, 0x1c, 0x72, 0x58, 0xdf, 0xcd, 0x91, 0xaa, 0x02, 0xb2, 0xcd, 0x21, + 0x12, 0x22, 0x3b, 0x73, 0xb4, 0xc2, 0x7e, 0xf8, 0xef, 0xea, 0x13, 0xcf, + 0x8e, 0x77, 0x2a, 0xa6, 0x55, 0x42, 0x45, 0xa4, 0x69, 0x69, 0x73, 0x0b, + 0xf4, 0xf6, 0xf7, 0x44, 0xab, 0x73, 0x35, 0x79, 0xb6, 0x40, 0x64, 0x2f, + 0x2d, 0x3f, 0xe9, 0x0d, 0xd7, 0xc5, 0xa8, 0x04, 0x15, 0x99, 0xa0, 0xfa, + 0x92, 0x6d, 0x53, 0x4b, 0x23, 0xf8, 0x71, 0xde, 0x3c, 0xbc, 0xc4, 0xbb, + 0x07, 0xbf, 0xd8, 0x1d, 0xe6, 0x63, 0x69, 0x19, 0x9b, 0x0a, 0xc8, 0x63, + 0x06, 0x6d, 0x76, 0x8a, 0x95, 0x27, 0x33, 0x5c, 0x5f, 0x95, 0x48, 0x36, + 0xf7, 0x2f, 0xf6, 0xe7, 0x23, 0x8f, 0xd8, 0xfd, 0x47, 0x53, 0x80, 0x54, + 0x76, 0xd2, 0x1d, 0x81, 0x34, 0xd9, 0x62, 0xff, 0x5e, 0x8c, 0xf9, 0xb6, + 0xdf, 0xa3, 0xba, 0xd2, 0x6c, 0xf2, 0x20, 0x91, 0xb5, 0x88, 0xee, 0xfa, + 0xe8, 0xf1, 0xfb, 0x7f, 0xb5, 0x20, 0x59, 0x53, 0x33, 0x6a, 0x55, 0xa1, + 0xaa, 0x62, 0x90, 0x48, 0x9c, 0xfd, 0x79, 0xf3, 0xcf, 0x5e, 0xa8, 0x28, + 0x20, 0x8f, 0x19, 0x44, 0x42, 0x64, 0x65, 0x86, 0x6f, 0x75, 0xbc, 0xfb, + 0x2f, 0xdd, 0xf7, 0x6f, 0xee, 0x75, 0x31, 0xe4, 0x26, 0x5a, 0x29, 0xe1, + 0x2a, 0xd2, 0xbc, 0xb4, 0xcd, 0x16, 0x88, 0xb4, 0xaf, 0x77, 0xf8, 0x6c, + 0x9f, 0xab, 0xc9, 0x42, 0x22, 0xeb, 0xe5, 0xd9, 0xf9, 0x54, 0x1c, 0xab, + 0x04, 0xb9, 0xd7, 0x16, 0x35, 0xb0, 0xa8, 0x36, 0x97, 0x6c, 0xd3, 0xe8, + 0x91, 0xf4, 0xd1, 0x95, 0xea, 0xa3, 0xeb, 0x42, 0x6d, 0x9f, 0x2b, 0x4f, + 0xe2, 0x6e, 0x07, 0x9d, 0xfa, 0x7f, 0x5d, 0xa9, 0x3e, 0xba, 0x52, 0x7d, + 0x74, 0xa5, 0xfa, 0xe8, 0x4a, 0xf5, 0xd1, 0x95, 0xea, 0x9f, 0xbb, 0xbe, + 0x2c, 0x97, 0xfd, 0xf1, 0x65, 0x2d, 0x4a, 0xf5, 0x61, 0xa5, 0xca, 0x80, + 0x94, 0x87, 0x95, 0xb2, 0x29, 0x46, 0x9b, 0x2e, 0x6d, 0xee, 0x06, 0xb5, + 0x28, 0x95, 0xa2, 0x54, 0x4a, 0x5e, 0xf9, 0x7d, 0x37, 0xb6, 0x52, 0x41, + 0x64, 0x2b, 0xd9, 0x4a, 0xb6, 0x92, 0xeb, 0xd9, 0xa6, 0x8f, 0x1f, 0x5c, + 0x31, 0xb0, 0x06, 0x6b, 0xb0, 0x06, 0x6b, 0x28, 0x16, 0x6a, 0xa5, 0x84, + 0x3d, 0x47, 0x29, 0x76, 0x29, 0x76, 0x29, 0xf6, 0x52, 0x2c, 0x8b, 0xf3, + 0xa6, 0xdf, 0xbd, 0xe5, 0xfd, 0x4f, 0xcf, 0xef, 0x28, 0x65, 0x67, 0xff, + 0x5b, 0xca, 0x57, 0xfb, 0x6b, 0x29, 0x47, 0xf6, 0x41, 0x9e, 0xf9, 0xbc, + 0x3f, 0x7f, 0xe0, 0x66, 0xcb, 0x99, 0x70, 0xe0, 0x59, 0x8a, 0x84, 0x0d, + 0x36, 0xd8, 0xa0, 0x62, 0x34, 0x2f, 0x6d, 0xb3, 0x06, 0xdd, 0x52, 0x01, + 0xd9, 0x92, 0xad, 0x73, 0xbf, 0xe6, 0xad, 0x5f, 0xf8, 0xbc, 0x37, 0xf2, + 0xe9, 0x9a, 0xc5, 0x0d, 0xb6, 0xcf, 0x68, 0x9f, 0x9b, 0xbe, 0x78, 0xbb, + 0x77, 0xee, 0x15, 0xb2, 0x25, 0x5b, 0xb2, 0x25, 0x5b, 0xb2, 0x25, 0x17, + 0x9b, 0xea, 0x27, 0x06, 0xc9, 0x18, 0x24, 0x4b, 0xc2, 0x90, 0xb0, 0x24, + 0x0c, 0x09, 0x4b, 0xc2, 0x90, 0xb0, 0x24, 0x0c, 0x09, 0x4b, 0xc2, 0x90, + 0xb0, 0x24, 0x0c, 0x09, 0x4b, 0xc2, 0x90, 0x48, 0x24, 0x12, 0x89, 0x44, + 0x22, 0x91, 0x48, 0x24, 0x12, 0x89, 0x44, 0x22, 0x21 +}; + +//*************************** Program and Shaders ***************************/ + +/** + * Program object ID. + */ +static GLuint progId = 0; + +/** + * Vertex shader ID. + */ +static GLuint vertId = 0; + +/** + * Fragment shader ID. + */ +static GLuint fragId = 0; + +//********************************* Uniforms *********************************/ + +/** + * Quad rotation angle ID. + */ +static GLint uRotId = -1; + +/** + * Draw colour ID. + */ +static GLint uTx0Id = -1; + +//******************************* Shader Source ******************************/ + +/** + * Vertex shader to draw texture mapped polys with an applied rotation. + */ +static GLchar const vertShader2D[] = +#if GL_ES_VERSION_2_0 + "#version 100\n" + "precision mediump float;\n" +#else + "#version 120\n" +#endif + "uniform float uRot;" // rotation + "attribute vec2 aPos;" // vertex position coords + "attribute vec2 aUV0;" // vertex texture UV0 + "varying vec2 vUV0;" // (passed to fragment shader) + "void main() {" + " float cosA = cos(radians(uRot));" + " float sinA = sin(radians(uRot));" + " mat3 rot = mat3(cosA, -sinA, 0.0," + " sinA, cosA, 0.0," + " 0.0, 0.0, 1.0);" + " gl_Position = vec4(rot * vec3(aPos, 1.0), 1.0);" + " vUV0 = aUV0;" + "}"; + +/** + * Fragment shader for the above polys. + */ +static GLchar const fragShader2D[] = +#if GL_ES_VERSION_2_0 + "#version 100\n" + "precision mediump float;\n" +#else + "#version 120\n" +#endif + "uniform sampler2D uTx0;" + "varying vec2 vUV0;" // (passed from fragment shader) + "void main() {" + " gl_FragColor = texture2D(uTx0, vUV0);" + "}"; + +/** + * Helper to compile a shader. + * + * \param type shader type + * \param text shader source + * \return the shader ID (or zero if compilation failed) + */ +static GLuint compileShader(GLenum const type, const GLchar* text) { + GLuint shader = glCreateShader(type); + if (shader) { + glShaderSource (shader, 1, &text, NULL); + glCompileShader(shader); + GLint compiled; + glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled); + if (compiled) { + return shader; + } else { + GLint logLen; + glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLen); + if (logLen > 1) { + GLchar* logStr = static_cast(malloc(logLen)); + glGetShaderInfoLog(shader, logLen, NULL, logStr); + #ifndef NDEBUG + printf("Shader compilation error: %s\n", logStr); + #endif + free(logStr); + } + glDeleteShader(shader); + } + } + return 0; +} + +//********************************** Helpers *********************************/ + +/** + * Vertex position index. + */ +#define GL_VERT_POSXY_ID 0 + +/** + * Vertex UV0 index. + */ +#define GL_VERT_TXUV0_ID 1 + + /** + * \c GL vec2 storage type. + */ +struct vec2 { + float x; + float y; +}; + +/** + * Combined 2D vertex and 2D texture coordinates. + */ +struct posTex2d { + struct vec2 pos; + struct vec2 uv0; +}; + +//****************************************************************************/ + +/** + * Current quad rotation angle (in degrees, updated per frame). + */ +static float rotDeg = 0.0f; + +/** + * Emscripten (single) GL context. + */ +static EMSCRIPTEN_WEBGL_CONTEXT_HANDLE glCtx = 0; + +/** + * Emscripten resize handler. + */ +static EM_BOOL resize(int type, const EmscriptenUiEvent* e, void* data) { + double surfaceW; + double surfaceH; + if (emscripten_get_element_css_size ("#canvas", &surfaceW, &surfaceH) == EMSCRIPTEN_RESULT_SUCCESS) { + emscripten_set_canvas_element_size("#canvas", surfaceW, surfaceH); + if (glCtx) { + glViewport(0, 0, (int) surfaceW, (int) surfaceH); + } + } + (void) type; + (void) data; + (void) e; + return EM_FALSE; +} + +/** + * Boilerplate to create a WebGL context. + */ +static EM_BOOL initContext() { + // Default attributes + EmscriptenWebGLContextAttributes attr; + emscripten_webgl_init_context_attributes(&attr); + if ((glCtx = emscripten_webgl_create_context("#canvas", &attr))) { + // Bind the context and fire a resize to get the initial size + emscripten_webgl_make_context_current(glCtx); + emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, EM_FALSE, resize); + resize(0, NULL, NULL); + return EM_TRUE; + } + return EM_FALSE; +} + +/** + * Called once per frame (clears the screen and draws the rotating quad). + */ +static void tick() { + glClearColor(1.0f, 0.0f, 1.0f, 1.0f); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + if (uRotId >= 0) { + glUniform1f(uRotId, rotDeg); + rotDeg += 0.1f; + if (rotDeg >= 360.0f) { + rotDeg -= 360.0f; + } + } + + glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0); + glFlush(); +} + +/** + * Creates the texture. + */ +bool upload(GLuint name, const uint8_t * data, size_t size, transcoder_texture_format type = cTFBC1) { + basisu_transcoder_init(); + if (!globalCodebook) { + globalCodebook = new etc1_global_selector_codebook(g_global_selector_cb_size, g_global_selector_cb); + } + basisu_transcoder transcoder(globalCodebook); + if (transcoder.validate_header(data, size)) { + basisu_image_info info; + if (transcoder.get_image_info(data, size, info, 0)) { + uint32_t descW, descH, blocks; + if (transcoder.get_image_level_desc(data, size, 0, 0, descW, descH, blocks)) { + basisu_file_info fileInfo; + transcoder.get_file_info(data, size, fileInfo); + if (transcoder.start_transcoding(data, size)) { + uint32_t decSize = basis_get_bytes_per_block(type) * blocks; + if (void* decBuf = malloc(decSize)) { + if (transcoder.transcode_image_level(data, size, 0, 0, decBuf, blocks, type)) { + GLenum glType; + switch (type) { + case cTFBC1: + glType = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; + break; + case cTFPVRTC1_4_RGB: + glType = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG; + break; + default: + glType = GL_FALSE; + } + if (glType != GL_FALSE) { + glBindTexture(GL_TEXTURE_2D, name); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glCompressedTexImage2D(GL_TEXTURE_2D, 0, + glType, descW, descH, 0, decSize, decBuf); + } + free(decBuf); + return glType != GL_FALSE; + } + } + } + } + } + } + return false; +} + +/** + * Creates the GL context, shaders and quad data, decompresses the Zstd data + * and 'uploads' the resulting texture. + * + * As a (naive) comparison, removing Zstd and building with "-Os -g0 s WASM=1 + * -lGL emscripten.c" results in a 15kB WebAssembly file; re-adding Zstd + * increases the Wasm by 26kB. + */ +int main() { + if (initContext()) { + // Compile shaders and set the initial GL state + if ((progId = glCreateProgram())) { + vertId = compileShader(GL_VERTEX_SHADER, vertShader2D); + fragId = compileShader(GL_FRAGMENT_SHADER, fragShader2D); + + glBindAttribLocation(progId, GL_VERT_POSXY_ID, "aPos"); + glBindAttribLocation(progId, GL_VERT_TXUV0_ID, "aUV0"); + + glAttachShader(progId, vertId); + glAttachShader(progId, fragId); + glLinkProgram (progId); + glUseProgram (progId); + uRotId = glGetUniformLocation(progId, "uRot"); + uTx0Id = glGetUniformLocation(progId, "uTx0"); + if (uTx0Id >= 0) { + glUniform1i(uTx0Id, 0); + } + + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glEnable(GL_BLEND); + glDisable(GL_DITHER); + + glCullFace(GL_BACK); + glEnable(GL_CULL_FACE); + } + + GLuint vertsBuf = 0; + GLuint indexBuf = 0; + GLuint txName = 0; + // Create the textured quad (vert positions then UVs) + struct posTex2d verts2d[] = { + {{-0.85f, -0.85f}, {0.0f, 0.0f}}, // BL + {{ 0.85f, -0.85f}, {1.0f, 0.0f}}, // BR + {{-0.85f, 0.85f}, {0.0f, 1.0f}}, // TL + {{ 0.85f, 0.85f}, {1.0f, 1.0f}}, // TR + }; + uint16_t index2d[] = { + 0, 1, 2, + 2, 1, 3, + }; + glGenBuffers(1, &vertsBuf); + glBindBuffer(GL_ARRAY_BUFFER, vertsBuf); + glBufferData(GL_ARRAY_BUFFER, + sizeof(verts2d), verts2d, GL_STATIC_DRAW); + glVertexAttribPointer(GL_VERT_POSXY_ID, 2, + GL_FLOAT, GL_FALSE, sizeof(struct posTex2d), 0); + glVertexAttribPointer(GL_VERT_TXUV0_ID, 2, + GL_FLOAT, GL_FALSE, sizeof(struct posTex2d), + (void*) offsetof(struct posTex2d, uv0)); + glGenBuffers(1, &indexBuf); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, + sizeof(index2d), index2d, GL_STATIC_DRAW); + glEnableVertexAttribArray(GL_VERT_POSXY_ID); + glEnableVertexAttribArray(GL_VERT_TXUV0_ID); + + transcoder_texture_format type = cTFRGB565; + if (emscripten_webgl_enable_extension(glCtx, "WEBKIT_WEBGL_compressed_texture_pvrtc")) { + printf("Has PVRTC!\n"); + type = cTFPVRTC1_4_RGB; + } else { + if (emscripten_webgl_enable_extension(glCtx, "WEBGL_compressed_texture_s3tc")) { + printf("Has BC1!\n"); + type = cTFBC1; + } + } + glGenTextures(1, &txName); + if (upload(txName, srcBasis, sizeof srcBasis, type)) { + printf("Decoded!\n"); + } + + emscripten_set_main_loop(tick, 0, EM_FALSE); + emscripten_exit_with_live_runtime(); + } else { + printf("Failed to init WebGL!\n"); + } + return EXIT_FAILURE; +} diff --git a/contrib/single_file_transcoder/examples/shell.html b/contrib/single_file_transcoder/examples/shell.html new file mode 100644 index 0000000..0e4c5c3 --- /dev/null +++ b/contrib/single_file_transcoder/examples/shell.html @@ -0,0 +1,18 @@ + + + + + + + + Emscripten Shell + + + + +{{{ SCRIPT }}} + + diff --git a/contrib/single_file_transcoder/examples/testcard.png b/contrib/single_file_transcoder/examples/testcard.png new file mode 100755 index 0000000..43088bb Binary files /dev/null and b/contrib/single_file_transcoder/examples/testcard.png differ