build system: add support for building shaders to SPIRV binaries

This adds the following to the project:
- glslc from Google’s shaderc
- src/shaders directory
- shaders are now built as part of the `build` command
- forcefully remove some files during the setup process and when cleaning

scripts/build.sh

@@ -55,7 +55,7 @@ wait
 # How to run a tool: specify the library path to use for the dynamic linker
 #   when running a program
 # Example: LD_LIBRARY_PATH=bin/lib bin/tools/dumpnbt
-echo ">>> Building tools..."
+echo ">>> Building programs..."
 create_directory bin/tools
 # add compile commands to this array
 COMPILE_COMMANDS=(
@@ -63,7 +63,7 @@ COMPILE_COMMANDS=(
     "$CXX_WITH_FLAGS src/tools/arraydump.cpp -I./include -Lbin/lib -l:file.so -l:cli.so -o bin/tools/arraydump"
     "$CXX_WITH_FLAGS src/tools/baseconvert.cpp -I./include -Lbin/lib -l:cli.so -o bin/tools/baseconvert"
     "$CXX_WITH_FLAGS -pthread src/tools/hexnet.cpp -I./include -Lbin/lib -l:cli.so -l:libsockpp.so -o bin/tools/hexnet"
-    "$CXX_WITH_FLAGS -DFOSSVG_DEBUG src/fossvg.cpp -I./include -Lbin/lib -l:cli.so -lglfw -lvulkan -o bin/fossvg"
+    "$CXX_WITH_FLAGS -DFOSSVG_DEBUG src/fossvg.cpp -I./include -Lbin/lib -l:file.so -l:cli.so -lglfw -lvulkan -o bin/fossvg"
     "$CXX_WITH_FLAGS src/fossvgd.cpp -I./include -Lbin/lib -l:cli.so -o bin/fossvgd"
 )
 for command in ${!COMPILE_COMMANDS[@]}; do
@@ -73,3 +73,21 @@ for command in ${!COMPILE_COMMANDS[@]}; do
 done
 
 wait
+
+echo ">>> Compiling shaders..."
+create_directory bin/shaders
+for shader in $(find ./src/shaders -name "*.vsh"); do
+    COMPILE_COMMAND="dependencies/shaderc/bin/glslc -o $(sed -e 's/^.\/src/.\/bin/;s/vsh$/vsh.spv/' <<< $shader) -fshader-stage=vertex $shader"
+    echo $COMPILE_COMMAND
+    $COMPILE_COMMAND &
+    $WAIT_ANYWAY
+done
+
+for shader in $(find ./src/shaders -name "*.fsh"); do
+    COMPILE_COMMAND="dependencies/shaderc/bin/glslc -o $(sed -e 's/^.\/src/.\/bin/;s/fsh$/fsh.spv/' <<< $shader) -fshader-stage=fragment $shader"
+    echo $COMPILE_COMMAND
+    $COMPILE_COMMAND &
+    $WAIT_ANYWAY
+done
+
+wait

scripts/clean_dependencies.sh

@@ -35,6 +35,6 @@ done
 echo "
 >>> Cleaning dependencies..."
 
-remove ./dependencies
+remove -f ./dependencies
 create_directory ./dependencies
 create_file ./dependencies/.placeholder

scripts/lib.sh

@@ -57,11 +57,18 @@ fi
 # `rm -v` only prints the names of the removed things instead of a more
 # comprehensible message like "removing NAME".
 function remove {
-    echo "Removing $1..."
-    if [ -d "$1" ]; then
-        rm -rv "$1"
+    local USE_FORCE=""
+    if [ "$1" = "-f" ]; then
+      USE_FORCE="-f"
+      echo "Forcefully removing $1..."
     else
-        rm -v "$1"
+      echo "Removing $1..."
+    fi;
+    shift
+    if [ -d "$1" ]; then
+        rm "$USE_FORCE" -rv "$1"
+    else
+        rm "$USE_FORCE" -v "$1"
     fi
 }
 

scripts/setup_project.sh

@@ -80,6 +80,11 @@ create_directory dependencies/tmp
 download https://github.com/DuffsDevice/tiny-utf8/archive/refs/tags/v4.4.3.tar.gz dependencies/tmp/tiny-utf8.tar.gz 8e3f61651909c9f3105d3501932a96aa65733127fb6e7cf94cb1b0a2dff42c8f
 download https://github.com/fpagliughi/sockpp/archive/refs/tags/v0.8.1.tar.gz dependencies/tmp/sockpp.tar.gz a8aedff8bd8c1da530b91be650352008fddabc9f1df0d19701d76cbc359c8651
 
+#TODO: figure out how to cache shaderc
+#also TODO: target a specific commit
+git clone --branch known-good https://github.com/google/shaderc.git dependencies/tmp/shaderc
+#download https://github.com/google/shaderc/archive/refs/tags/v2023.7.tar.gz dependencies/tmp/shaderc.tar.gz 681e1340726a0bf46bea7e31f10cbfe78e01e4446a35d90fedc2b78d400fcdeb
+
 echo -n ">>> Extracting tiny-utf8... "
 gzip -d dependencies/tmp/tiny-utf8.tar.gz
 tar -xf dependencies/tmp/tiny-utf8.tar -C dependencies
@@ -112,6 +117,26 @@ else
     cmake --build build
 fi
 popd >/dev/null 2>&1
+echo ">>> done"
+
+echo ">>> Dealing with shaderc shenanigans..."
+pushd dependencies/tmp/shaderc
+echo "Getting sources using the provided script..."
+./update_shaderc_sources.py
+SHADERC_BUILD="build-$(dd if=/dev/urandom bs=1 count=5 2>/dev/null | base32)"
+echo "Creating and entering directory $SHADERC_BUILD."
+mkdir "$SHADERC_BUILD"
+cd "$SHADERC_BUILD"
+echo "Running CMake..."
+CXXFLAGS="-Wno-error" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../src/
+echo "Running Ninja..."
+ninja
+popd >/dev/null 2>&1
+#if needed copy more relevant files to dependencies/shaderc
+echo "Copying binary to dependencies/shaderc/bin..."
+mkdir -vp dependencies/shaderc/bin
+cp -v "dependencies/tmp/shaderc/$SHADERC_BUILD/glslc/glslc" dependencies/shaderc/bin
+echo ">>> done"
 
 echo ">>> Cleaning up..."
-remove dependencies/tmp
+remove -f dependencies/tmp