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* Added some named gamma recognition to lutnType ICC profile parsingGravatar raftias2016-12-08
| | | | | | | | | | | | | | Most CMYK images I tested had linear gamma specified as tables, which is easily recognized and when present allows an entire SkRasterPipeline stage to be avoided for every single channel. This is likely due to the fact that gamma tables are required in lutntype A2B0 profiles. BUG=skia: Change-Id: I82b65848c4099035d61098abb66e9afe0b080930 Reviewed-on: https://skia-review.googlesource.com/5388 Reviewed-by: Matt Sarett <msarett@google.com> Commit-Queue: Robert Aftias <raftias@google.com>
* Optimized gamma table inversion.Gravatar raftias2016-12-01
| | | | | | | | | | | | | | Brought calculation into a central place so the loop did not have to recalculate everything before the previous entry to find the inverse index. O(n) vs O(n^2). Assumes an increasing (or at least non-decreasing) table gamma just as the previous code did. BUG=skia: Change-Id: I7ea200c06511b3d74745fe4a6e3dde706bbee02f Reviewed-on: https://skia-review.googlesource.com/5402 Commit-Queue: Robert Aftias <raftias@google.com> Reviewed-by: Matt Sarett <msarett@google.com>
* Added CMYK support for ICC profiles.Gravatar raftias2016-12-01
| | | | | | | | | | | | | | Changed ICC parsing/SkGammas/SkColorLookUpTable to handle non-3-channel inputs. Parsed CMYK A2B ICC profiles. Integrated this with SkJpegCodec (the only file that supports CMYK) and SkColorSpaceXform_A2B to allow parsing and color xforming of ICC CMYK images. CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: I11e3d17180244281be3eb43fd608609925a7f71e Reviewed-on: https://skia-review.googlesource.com/5444 Reviewed-by: Matt Sarett <msarett@google.com> Commit-Queue: Matt Sarett <msarett@google.com>
* Revert "Added CMYK support for ICC profiles."Gravatar Mike Klein2016-12-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 51c3fcd376c5c9972d9476b5532f6164375a38d1. Reason for revert: ASAN, MSAN both take issue with parse_and_load_gamma() Original change's description: > Added CMYK support for ICC profiles. > > Changed ICC parsing/SkGammas/SkColorLookUpTable to handle non-3-channel > inputs. Parsed CMYK A2B ICC profiles. Integrated this with SkJpegCodec > (the only file that supports CMYK) and SkColorSpaceXform_A2B to allow > parsing and color xforming of ICC CMYK images. > > BUG=skia: > > GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5197 > CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD > > > Change-Id: Id6619f63f04071f79cd2d84321857dfa269ad3aa > Reviewed-on: https://skia-review.googlesource.com/5197 > Commit-Queue: Mike Klein <mtklein@chromium.org> > Reviewed-by: Matt Sarett <msarett@google.com> > Reviewed-by: Mike Klein <mtklein@chromium.org> > Reviewed-by: Leon Scroggins <scroggo@google.com> > TBR=mtklein@chromium.org,mtklein@google.com,msarett@google.com,scroggo@google.com,brianosman@google.com,raftias@google.com,reviews@skia.org NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Change-Id: Ib43fef00bc233c0b4fa47ed29040d69601def267 Reviewed-on: https://skia-review.googlesource.com/5423 Commit-Queue: Mike Klein <mtklein@chromium.org> Reviewed-by: Mike Klein <mtklein@chromium.org>
* Added CMYK support for ICC profiles.Gravatar raftias2016-12-01
| | | | | | | | | | | | | | | | | | | | Changed ICC parsing/SkGammas/SkColorLookUpTable to handle non-3-channel inputs. Parsed CMYK A2B ICC profiles. Integrated this with SkJpegCodec (the only file that supports CMYK) and SkColorSpaceXform_A2B to allow parsing and color xforming of ICC CMYK images. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5197 CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: Id6619f63f04071f79cd2d84321857dfa269ad3aa Reviewed-on: https://skia-review.googlesource.com/5197 Commit-Queue: Mike Klein <mtklein@chromium.org> Reviewed-by: Matt Sarett <msarett@google.com> Reviewed-by: Mike Klein <mtklein@chromium.org> Reviewed-by: Leon Scroggins <scroggo@google.com>
* Initial implementation of a SkColorSpace_A2B xformGravatar raftias2016-11-11
| | | | | | | | | | | | | | | | There is support for all features of SkColorSpace_A2B. Tests for these functionality were adapted from the XYZ xform, plus a CLUT-specific test was added. Shared functions used by both SkColorSpaceXform_XYZ and SkColorSpaceXform_A2B have been moved into a shared header. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2449243003 CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot Review-Url: https://codereview.chromium.org/2449243003
* Add/promote gamma helpers to SkColorSpace_BaseGravatar Brian Osman2016-11-07
| | | | | | | | | | | | | | | | | | | When decoding images with strange transfer functions, we need to pick an "equivalent" drawable format and color space. These help when doing that. Our default answer is to use F16 linear, but some GPUs may not be able to draw that, in which case we'll fall back to sRGB 8888. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4453 Change-Id: I7f7342423d2a57fb45c965e1a023d255cdafedee Reviewed-on: https://skia-review.googlesource.com/4453 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Mike Klein <mtklein@chromium.org> Reviewed-by: Matt Sarett <msarett@google.com>
* Refactored SkColorSpace_A2B to allow arbitrary ordering of elementsGravatar raftias2016-10-24
| | | | | | | | | | | | | | | This is essential for representing non-lutAtoBType A2B tags such as lut16Type, lut8Type, mpet. Parsing of A2B0 tags was also moved ahead of the TRC/XYZ-matrix parsing, as profiles examined with both tags either had the TRC/XYZ tags as a fall-back or were incorrectly displayed if only the TRC/XYZ tags were used. This was submitted alone to reduce CL size. Tests that will use these changes will be introduced in the subsequent CLs that add on lut8/16Type A2B0 parsing. We already have lut16Type test images and these have been tested locally, but require additional code not submitted yet for lut16Type ICC profile parsing and A2B colorspace xforms. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2444553002 Review-Url: https://codereview.chromium.org/2444553002
* Hash the gamut of XYZ color spaces, to speed up comparisonGravatar Brian Osman2016-10-20
| | | | | | | | | | | | | | Also going to use this to allow caching of GrColorSpaceXforms BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3670 Change-Id: I56ed2dcbdddc22046263f56d68f2d6aea55547c8 Reviewed-on: https://skia-review.googlesource.com/3670 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Matt Sarett <msarett@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com>
* Refactored SkColorSpace and added in a Lab PCS GMGravatar raftias2016-10-18
The refactoring breaks off A2B0 tag support into a separate subclass of SkColorSpace_Base, while keeping the current (besides CLUT) functionality in a XYZTRC subclass. ICC profile loading is now aware of this and creates the A2B0 subclass when SkColorSpace::NewICC() is called on a profile in need of the A2B0 functionality. The LabPCSDemo GM loads a .icc profile containing a LAB PCS and then runs a Lab->XYZ conversion on an image using it so we can display it and test out the A2B0 SkColorSpace functionality, sans a/b/m-curves, as well as the Lab->XYZ conversion code. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2389983002 Review-Url: https://codereview.chromium.org/2389983002
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