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* Refactor bilerp a little.Gravatar Mike Klein2016-12-06
| | | | | | | | | | | | | | | | | | | 1) rename to bilerp_xy, for x,y in {n[egative], p[ositive}; 2) pull out a save_xy stage to save off the original x,y; 3) also calculate the fractional x,y fx,fy once instead of 4 times. 1) is a pure refactor; 2) adds a stage but otherwise is nothing different; 3) changes images a little bit (fractional parts can vary a bit around powers of two). This extends naturally to naive bicubic using 16 bicubic_xy stages. CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: I666de5c21e978abb4feb6e3225e5b5920ba6c5b9 Reviewed-on: https://skia-review.googlesource.com/5550 Commit-Queue: Mike Klein <mtklein@chromium.org> Reviewed-by: Herb Derby <herb@google.com>
* support medium and high qualityGravatar Mike Klein2016-11-30
| | | | | | | Change-Id: I4ed750932cd6c768e21ca9f4a9e7f5f2408cfa4d Reviewed-on: https://skia-review.googlesource.com/5323 Commit-Queue: Mike Klein <mtklein@chromium.org> Reviewed-by: Mike Klein <mtklein@chromium.org>
* support a8Gravatar Mike Klein2016-11-29
| | | | | | | | | | | Most of this is plumbing through the full paint to shaders instead of just the filter quality. CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: I6afde07566afa3a4391c24dca7017a9a4f5ec700 Reviewed-on: https://skia-review.googlesource.com/5317 Commit-Queue: Mike Klein <mtklein@chromium.org> Reviewed-by: Mike Reed <reed@google.com>
* gather_i8Gravatar Mike Klein2016-11-29
| | | | | | | | | CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: Ia7a133f515e29e16700aabc0633c77a703425f41 Reviewed-on: https://skia-review.googlesource.com/5239 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>
* Split srgb out of accum stages.Gravatar Mike Klein2016-11-28
| | | | | | | | | | | | | | | | | | By stashing the scales in the context (i.e. on the stack), we can free up enough registers to really simplify how the bitmap sample stages interact. Nearest neighbor is straightforward now: just call the appropriate gather_ function, and you're done. The source pixels end up in the source registers. If they're sRGB encoded, follow up with from_srgb_s To bilerp, we bracket those 1 or 2 gather+from_srgb_s stages with a stage setting up each corner (x += dx, y += dy, save off scale) and a stage that accumulates into the d-registers (load saved scale, dr += scale * r, etc.). When all the samples are accumulated, copy the d-registers into the s-registers. from_srgb_d and to_srgb are lightly sketched here and will be used in the next CL, where I apply this same factoring to non-bitmap loads and stores. This is a little tricky, because we don't actually have a float->float to_srgb yet. CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD Change-Id: I272a1f278f0ea1b29a2f07ac225f753faa8dae81 Reviewed-on: https://skia-review.googlesource.com/5271 Reviewed-by: Mike Klein <mtklein@chromium.org> Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>
* bilerpGravatar Mike Klein2016-11-22
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5107 Change-Id: I5c30105501cbdb57896d9ec35737494eabd5998b Reviewed-on: https://skia-review.googlesource.com/5107 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>