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Enable ETC for Suzanne normal map.

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Due to an assertion in etc2comp, this unfortunately uses RGB8 instead of
RG11 but it still helps quite a bit (3.3 MB savings in the unzipped KTX
size).
This commit is contained in:
Philip Rideout
2018-10-03 11:34:20 -07:00
parent cc61e4649b
commit 37a42ee854
4 changed files with 9 additions and 4 deletions
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5
libs/imageio/src/BlockCompression.cpp
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@@ -19,6 +19,7 @@
#include <image/ImageOps.h>
#include <cmath>
#include <thread>
#include <astcenc.h>
#include <Etc.h>
@@ -186,7 +187,7 @@ CompressedTexture astcCompress(const LinearImage& original, AstcConfig config) {
// Perform compression.
constexpr int threadcount = 1; // TODO: set this thread count
const int threadcount = std::thread::hardware_concurrency();
constexpr astc_decode_mode decode_mode = DECODE_LDR; // TODO: honor the config semantic
constexpr swizzlepattern swz_encode = { 0, 1, 2, 3 };
constexpr swizzlepattern swz_decode = { 0, 1, 2, 3 };
@@ -317,7 +318,7 @@ S3tcConfig s3tcParseOptionString(const std::string& options) {
CompressedTexture etcCompress(const LinearImage& original, EtcConfig config) {
LinearImage source = extendToFourChannels(original);
constexpr int threadcount = 1; // TODO: set this thread count
const int threadcount = std::thread::hardware_concurrency();
Etc::Image::Format etcformat;
switch (config.format) {
case CompressedFormat::R11_EAC: etcformat = Etc::Image::Format::R11; break;