optimize texture sampling

pxl8.sh

@@ -284,6 +284,8 @@ else
     BINDIR="$BINDIR/debug"
 fi
 
+DEP_CFLAGS="-O3 -ffast-math -funroll-loops"
+
 case "$COMMAND" in
     build)
         mkdir -p "$BUILDDIR"
@@ -333,7 +335,8 @@ case "$COMMAND" in
 
         INCLUDES="-Isrc -Ilib -Ilib/microui/src -Ilib/luajit/src -Ilib/linenoise -Ilib/miniz"
         COMPILE_FLAGS="$CFLAGS $INCLUDES"
-        
+        DEP_COMPILE_FLAGS="$DEP_CFLAGS $INCLUDES"
+
         EXECUTABLE="$BINDIR/pxl8"
 
         LIB_SOURCE_FILES="lib/linenoise/linenoise.c lib/microui/src/microui.c lib/miniz/miniz.c"
@@ -376,7 +379,7 @@ case "$COMMAND" in
 
             if [[ "$src_file" -nt "$obj_file" ]]; then
                 NEED_LINK=true
-                compile_source_file "$src_file" "$obj_file" "$COMPILE_FLAGS"
+                compile_source_file "$src_file" "$obj_file" "$DEP_COMPILE_FLAGS"
                 SOURCES_COMPILED="yes"
             fi
         done