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Enable lossless mode (#85) 

Enable lossless mode with `SDImageCoderEncodeWebPLossless`

---------

Co-authored-by: DreamPiggy <lizhuoli1126@126.com>
This commit is contained in:
Liu YuanYuan 2023-10-08 03:22:36 -05:00 committed by GitHub
parent 3819cb70fa
commit 64cdf3e756
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 13 additions and 2 deletions
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2
SDWebImageWebPCoder/Classes/SDImageWebPCoder.m
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@ -955,7 +955,7 @@ WEBP_CSP_MODE ConvertCSPMode(CGBitmapInfo bitmapInfo) {
config->target_size = (int)maxFileSize; // Max filesize for output, 0 means use quality instead
config->pass = maxFileSize > 0 ? 6 : 1; // Use 6 passes for file size limited encoding, which is the default value of `cwebp` command line
config->lossless = 0; // Disable lossless encoding (If we need, can add new Encoding Options in future version)
config->lossless = GetIntValueForKey(options, SDImageCoderEncodeWebPLossless, config->lossless);
config->method = GetIntValueForKey(options, SDImageCoderEncodeWebPMethod, config->method);
config->pass = GetIntValueForKey(options, SDImageCoderEncodeWebPPass, config->pass);

8
SDWebImageWebPCoder/Classes/SDWebImageWebPCoderDefine.h
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@ -132,4 +132,12 @@ FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPPartit
*/
FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPUseSharpYuv;
/**
0: Disabled, 1: Enabled.
Lossless mode. Note that if lossless is enabled, encoder quality param specifies
compression effort. 100 means maximum compression.
Details on cwebp documentation: https://developers.google.com/speed/webp/docs/cwebp#lossless
*/
FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPLossless;
NS_ASSUME_NONNULL_END

1
SDWebImageWebPCoder/Classes/SDWebImageWebPCoderDefine.m
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@ -26,3 +26,4 @@ SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPShowCompressed = @"webPS
SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPPartitions = @"webPPartitions";
SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPPartitionLimit = @"webPPartitionLimit";
SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPUseSharpYuv = @"webPUseSharpYuv";
SDImageCoderOption _Nonnull const SDImageCoderEncodeWebPLossless = @"webPLossless";

4
Tests/SDWebImageWebPCoderTests.m
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@ -252,7 +252,8 @@ const int64_t kAsyncTestTimeout = 5;
SDImageCoderEncodeWebPShowCompressed: @16,
SDImageCoderEncodeWebPPartitions: @17,
SDImageCoderEncodeWebPPartitionLimit: @18,
SDImageCoderEncodeWebPUseSharpYuv: @19 };
SDImageCoderEncodeWebPUseSharpYuv: @19,
SDImageCoderEncodeWebPLossless: @1 };
[SDImageWebPCoder.sharedCoder updateWebPOptionsToConfig:&config maxFileSize:1200 options:options];
@ -275,6 +276,7 @@ const int64_t kAsyncTestTimeout = 5;
expect(config.partitions).to.equal(17);
expect(config.partition_limit).to.equal(18);
expect(config.use_sharp_yuv).to.equal(19);
expect(config.lossless).to.equal(1);
}
- (void)testEncodingSettingsDefaultValue {