diff options
| author |  bsalomon <bsalomon@google.com> | 2015-01-31 20:10:56 -0800 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2015-01-31 20:10:56 -0800 |
| commit | e137db8569e7a10d809980609688b3acfaec612a (patch) | |
| tree | f2f41a49f6b250074d4a176c207cc9d64779ef57 /include/gpu/GrPaint.h | |
| parent | 8a4527e98a57b1d2dd248a635f0c4fa227be2089 (diff) | |
Revert of Move npot resizing out of GrContext and simplify GrContext texture functions. (patchset #10 id:200001 of https://codereview.chromium.org/882223003/)
Reason for revert:
perf fix didn't fix the cr webgl conformance tests
Original issue's description:
> Move npot resizing out of GrContext and simplify GrContext texture functions.
>
> Committed: https://skia.googlesource.com/skia/+/8a8100349105c8c6de39fcb34e47679da7a67f54
>
> Committed: https://skia.googlesource.com/skia/+/6c96672491b04cb782bce8fee778124df66524a0
TBR=robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/887303002
Diffstat (limited to 'include/gpu/GrPaint.h')
| -rw-r--r-- | include/gpu/GrPaint.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/include/gpu/GrPaint.h b/include/gpu/GrPaint.h index 64b51d2c65..8163f6e4d8 100644 --- a/include/gpu/GrPaint.h +++ b/include/gpu/GrPaint.h @@ -25,15 +25,23 @@ * created by subclassing GrProcessor. * * The primitive color computation starts with the color specified by setColor(). This color is the - * input to the first color stage. Each color stage feeds its output to the next color stage. + * input to the first color stage. Each color stage feeds its output to the next color stage. The + * final color stage's output color is input to the color filter specified by + * setXfermodeColorFilter which produces the final source color, S. * * Fractional pixel coverage follows a similar flow. The coverage is initially the value specified * by setCoverage(). This is input to the first coverage stage. Coverage stages are chained * together in the same manner as color stages. The output of the last stage is modulated by any * fractional coverage produced by anti-aliasing. This last step produces the final coverage, C. * - * setXPFactory is used to control blending between the output color and dest. It also implements - * the application of fractional coverage from the coverage pipeline. + * setBlendFunc() specifies blending coefficients for S (described above) and D, the initial value + * of the destination pixel, labeled Bs and Bd respectively. The final value of the destination + * pixel is then D' = (1-C)*D + C*(Bd*D + Bs*S). + * + * Note that the coverage is applied after the blend. This is why they are computed as distinct + * values. + * + * TODO: Encapsulate setXfermodeColorFilter in a GrProcessor and remove from GrPaint. */ class GrPaint { public: |