[aapt2] Add a compression control option to 'compile'
aapt2 recompresses all PNGs it compiles, and by default it
uses the best (and slowest) zlib compression level, 9.
This change adds a command line option --png-compression-level
to control that, so it's possible to set it to something faster
e.g. 6 which is usually 5x faster and around 101% of the size
of level 9 PNGs
Test: manual, compile Framework
Flag: EXEMPT tool
Change-Id: Ibe5f47b82e1c13be0a4ffff0e07e675871abc956
diff --git a/tools/aapt2/cmd/Compile.h b/tools/aapt2/cmd/Compile.h
index 70c8791..e244546 100644
--- a/tools/aapt2/cmd/Compile.h
+++ b/tools/aapt2/cmd/Compile.h
@@ -47,6 +47,8 @@
bool verbose = false;
std::optional<std::string> product_;
FeatureFlagValues feature_flag_values;
+ std::optional<std::string> png_compression_level;
+ int png_compression_level_int = 9;
};
/** Parses flags and compiles resources to be used in linking. */
@@ -65,6 +67,9 @@
AddOptionalSwitch("--pseudo-localize", "Generate resources for pseudo-locales "
"(en-XA and ar-XB)", &options_.pseudolocalize);
AddOptionalSwitch("--no-crunch", "Disables PNG processing", &options_.no_png_crunch);
+ AddOptionalFlag("--png-compression-level",
+ "Set the zlib compression level for crunched PNG images, [0-9], 9 by default.",
+ &options_.png_compression_level);
AddOptionalSwitch("--legacy", "Treat errors that used to be valid in AAPT as warnings",
&options_.legacy_mode);
AddOptionalSwitch("--preserve-visibility-of-styleables",