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| author |  Brian Salomon <bsalomon@google.com> | 2018-01-05 13:12:14 -0500 |
|---|---|---|
| committer | Brian Salomon <bsalomon@google.com> | 2018-01-05 18:45:08 +0000 |
| commit | 262cd409663eb24ca0ecbcd6091d59894d42a030 (patch) | |
| tree | 090fa999df36c2bc12043ecf656d1f1d3230a24b /docs/SkMatrix_Reference.bmh | |
| parent | 5ef4ebf3c464210ab0eec84e62438d6135f44f8a (diff) | |
Update SkMatrix_Reference.bmh to reflect mapPointsWithStride removal
Change-Id: I6a932e011a0d2bb0ddad120b824499d6624418c8
Reviewed-on: https://skia-review.googlesource.com/91443
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Diffstat (limited to 'docs/SkMatrix_Reference.bmh')
| -rw-r--r-- | docs/SkMatrix_Reference.bmh | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/docs/SkMatrix_Reference.bmh b/docs/SkMatrix_Reference.bmh index 81e95a2d0a..5828790e61 100644 --- a/docs/SkMatrix_Reference.bmh +++ b/docs/SkMatrix_Reference.bmh @@ -3312,59 +3312,6 @@ Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- # ------------------------------------------------------------------------------ -#Method void mapPointsWithStride(SkPoint dst[], const SkPoint src[], size_t stride, int count) const - -Maps src Point array of length count to dst Point array, skipping stride bytes -to advance from one Point to the next. -Points are mapped by multiplying each Point by Matrix. Given: - -#Code -#Literal - | A B C | | x | -Matrix = | D E F |, src = | y | - | G H I | | 1 | -## - -each resulting dst Point is computed as: - -#Code -#Literal - |A B C| |x| Ax+By+C Dx+Ey+F -Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- - |G H I| |1| Gx+Hy+I Gx+Hy+I -## - -#Param dst storage for mapped Points ## -#Param src Points to transform ## -#Param stride size of record starting with Point, in bytes ## -#Param count number of Points to transform ## - -#Example - struct PointZ { - SkPoint fPt; - const SkPoint fStationary; - }; - const PointZ src[] = {{{40, 70}, {40, 70}}, {{180, 70}, {180, 70}}, {{180, 220}, {180, 220}}, - {{40, 220}, {40, 220}}}; - PointZ dst[] = {{{0, 0}, {60, 80}}, {{0, 0}, {150, 40}}, {{0, 0}, {100, 240}}, - {{0, 0}, {10, 250}}}; - constexpr int count = SK_ARRAY_COUNT(src); - SkPaint paint; - paint.setARGB(77, 23, 99, 154); - for (int i = 0; i < 5; ++i) { - SkMatrix matrix; - matrix.setRotate(10 * i, 128, 128); - matrix.mapPointsWithStride(&dst[0].fPt, &src[0].fPt, sizeof(PointZ), count); - canvas->drawPoints(SkCanvas::kPolygon_PointMode, count * 2, &dst[0].fPt, paint); - } -## - -#SeeAlso mapPoints mapXY mapHomogeneousPoints mapVectors - -## - -# ------------------------------------------------------------------------------ - #Method void mapHomogeneousPoints(SkPoint3 dst[], const SkPoint3 src[], int count) const Maps src Point3 array of length count to dst Point3 array, which must of length count or |