0c5f54663b
some new image work turn dos into unix linefeeds add SkBitmap::pixmap() Docs-Preview: https://skia.org/?cl=83863 TBR=caryclark@google.com Bug: skia:6898 Change-Id: I06242b4b66464814b753fe37f930baf32f79323a Reviewed-on: https://skia-review.googlesource.com/83863 Reviewed-by: Cary Clark <caryclark@skia.org> Commit-Queue: Cary Clark <caryclark@skia.org>
453 lines
11 KiB
Plaintext
453 lines
11 KiB
Plaintext
#Topic IPoint
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#Alias IPoints
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#Alias IPoint_Reference
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#Struct SkIPoint
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SkIPoint holds two 32 bit integer coordinates
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#Topic Overview
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#Subtopic Subtopics
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#ToDo manually add subtopics ##
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#Table
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#Legend
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# topics # description ##
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#Legend ##
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#Table ##
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##
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#Subtopic Operators
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#Table
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#Legend
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# description # function ##
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#Legend ##
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# SkIPoint operator-()_const # Reverses sign of IPoint. ##
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# SkIPoint operator+(const SkIPoint& a, const SkIVector& b) # Returns IPoint offset by IVector. ##
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# SkIVector operator-(const SkIPoint& a, const SkIPoint& b) # Returns IVector between IPoints. ##
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# bool operator!=(const SkIPoint& a, const SkIPoint& b) # Returns true if IPoints are unequal. ##
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# bool operator==(const SkIPoint& a, const SkIPoint& b) # Returns true if IPoints are equal. ##
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# void operator+=(const SkIVector& v) # Adds IVector to IPoint. ##
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# void operator-=(const SkIVector& v) # Subtracts IVector from IPoint. ##
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#Table ##
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#Subtopic ##
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#Subtopic Member_Functions
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#Table
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#Legend
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# description # function ##
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#Legend ##
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# Make # Constructs from integer inputs. ##
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# equals() # Returns true if members are equal. ##
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# isZero # Returns true if both members equal zero. ##
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# set() # Sets to integer input. ##
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# x() # Returns fX. ##
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# y() # Returns fY. ##
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#Table ##
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#Subtopic ##
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#Topic ##
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#Member int32_t fX
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x-axis value used by IPoint.
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##
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#Member int32_t fY
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y-axis value used by IPoint.
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##
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# ------------------------------------------------------------------------------
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#Method static constexpr SkIPoint Make(int32_t x, int32_t y)
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Sets fX to x, fY to y.
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#Param x integer x-axis value of constructed IPoint ##
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#Param y integer y-axis value of constructed IPoint ##
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#Return IPoint (x, y) ##
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#Example
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SkIPoint pt1 = {45, 66};
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SkIPoint pt2 = SkIPoint::Make(45, 66);
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SkDebugf("pt1 %c= pt2\n", pt1 == pt2 ? '=' : '!');
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#StdOut
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pt1 == pt2
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##
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##
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#SeeAlso set() SkPoint::iset() SkPoint::Make SkIPoint16::Make
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#Method ##
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# ------------------------------------------------------------------------------
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#Method int32_t x() const
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Returns x-axis value of IPoint.
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#Return fX ##
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#Example
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SkIPoint pt1 = {45, 66};
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SkDebugf("pt1.fX %c= pt1.x()\n", pt1.fX == pt1.x() ? '=' : '!');
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#StdOut
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pt1.fX == pt1.x()
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##
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##
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#SeeAlso y() SkPoint::x() SkIPoint16::x()
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#Method ##
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# ------------------------------------------------------------------------------
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#Method int32_t y() const
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Returns y-axis value of IPoint.
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#Return fY ##
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#Example
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SkIPoint pt1 = {45, 66};
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SkDebugf("pt1.fY %c= pt1.y()\n", pt1.fY == pt1.y() ? '=' : '!');
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#StdOut
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pt1.fY == pt1.y()
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##
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##
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#SeeAlso x() SkPoint::y() SkIPoint16::y()
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#Method ##
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# ------------------------------------------------------------------------------
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#Method bool isZero() const
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Returns true if fX and fY are both zero.
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#Return true if fX is zero and fY is zero ##
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#Example
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SkIPoint pt = { 0, -0};
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SkDebugf("pt.isZero() == %s\n", pt.isZero() ? "true" : "false");
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#StdOut
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pt.isZero() == true
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##
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##
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#SeeAlso SkPoint::isZero
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#Method ##
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# ------------------------------------------------------------------------------
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#Method void set(int32_t x, int32_t y)
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Sets fX to x and fY to y.
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#Param x new value for fX ##
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#Param y new value for fY ##
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#Example
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SkIPoint pt1, pt2 = { SK_MinS32, SK_MaxS32 };
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pt1.set(SK_MinS32, SK_MaxS32);
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SkDebugf("pt1 %c= pt2\n", pt1 == pt2 ? '=' : '!');
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#StdOut
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pt1 == pt2
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##
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##
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#SeeAlso Make SkIPoint16::set
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#Method ##
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# ------------------------------------------------------------------------------
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#Method SkIPoint operator-()_const
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Returns IPoint changing the signs of fX and fY.
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#Return IPoint as (-fX, -fY) ##
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#Example
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SkIPoint test[] = { {0, -0}, {-1, -2},
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{ SK_MaxS32, SK_MinS32 },
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{ SK_NaN32, -SK_NaN32 } };
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for (const SkIPoint& pt : test) {
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SkIPoint negPt = -pt;
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SkDebugf("pt: %d, %d negate: %d, %d\n", pt.fX, pt.fY, negPt.fX, negPt.fY);
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}
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#StdOut
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pt: 0, 0 negate: 0, 0
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pt: -1, -2 negate: 1, 2
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pt: 2147483647, -2147483647 negate: -2147483647, 2147483647
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pt: -2147483648, -2147483648 negate: -2147483648, -2147483648
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##
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##
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#SeeAlso operator-(const SkIPoint& a, const SkIPoint& b) operator-=(const SkIVector& v) SkPoint::operator-()_const
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#Method ##
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# ------------------------------------------------------------------------------
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#Method void operator+=(const SkIVector& v)
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Offsets IPoint by IVector v. Sets IPoint to
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#Formula
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(fX + v.fX, fY + v.fY)
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##
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.
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#Param v IVector to add ##
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#Example
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#Height 64
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auto draw_lines = [=](const SkIPoint pts[], size_t count, SkPaint& paint) -> void {
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for (size_t i = 0; i < count - 1; ++i) {
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SkPoint p0, p1;
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p0.iset(pts[i]);
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p1.iset(pts[i + 1]);
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canvas->drawLine(p0, p1, paint);
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}
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};
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SkIPoint points[] = { { 3, 1 }, { 4, 2 }, { 5, 1 }, { 7, 3 } };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->scale(30, 15);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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points[1] += {1, 1};
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points[2] += {-1, -1};
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paint.setColor(SK_ColorRED);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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##
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#SeeAlso operator+(const SkIPoint& a, const SkIVector& b) SkPoint::operator+=(const SkVector& v)
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#Method ##
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# ------------------------------------------------------------------------------
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#Method void operator-=(const SkIVector& v)
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Subtracts IVector v from IPoint. Sets IPoint to:
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#Formula
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(fX - v.fX, fY - v.fY)
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##
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.
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#Param v IVector to subtract ##
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#Example
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#Height 64
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auto draw_lines = [=](const SkIPoint pts[], size_t count, SkPaint& paint) -> void {
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for (size_t i = 0; i < count - 1; ++i) {
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SkPoint p0, p1;
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p0.iset(pts[i]);
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p1.iset(pts[i + 1]);
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canvas->drawLine(p0, p1, paint);
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}
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};
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SkIPoint points[] = { { 3, 1 }, { 4, 2 }, { 5, 1 }, { 7, 3 } };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->scale(30, 15);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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points[1] -= {1, 1};
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points[2] -= {-1, -1};
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paint.setColor(SK_ColorRED);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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##
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#SeeAlso operator-(const SkIPoint& a, const SkIPoint& b) SkPoint::operator-=(const SkVector& v)
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#Method ##
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# ------------------------------------------------------------------------------
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#Method bool equals(int32_t x, int32_t y) const
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Returns true if IPoint is equivalent to IPoint constructed from (x, y).
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#Param x value compared with fX ##
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#Param y value compared with fY ##
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#Return true if IPoint equals (x, y) ##
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#Example
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SkIPoint test[] = { {0, -0}, {-1, -2}, {SK_MaxS32, -1}, {SK_NaN32, -1} };
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for (const SkIPoint& pt : test) {
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SkDebugf("pt: %d, %d %c= pt\n", pt.fX, pt.fY, pt.equals(pt.fX, pt.fY) ? '=' : '!');
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}
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#StdOut
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pt: 0, 0 == pt
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pt: -1, -2 == pt
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pt: 2147483647, -1 == pt
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pt: -2147483648, -1 == pt
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##
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##
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#SeeAlso operator==(const SkIPoint& a, const SkIPoint& b)
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#Method ##
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# ------------------------------------------------------------------------------
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#Method bool operator==(const SkIPoint& a, const SkIPoint& b)
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Returns true if a is equivalent to b.
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#Param a IPoint to compare ##
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#Param b IPoint to compare ##
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#Return true if a.fX == b.fX and a.fY == b.fY ##
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#Example
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SkIPoint test[] = { {0, -0}, {-1, -2}, {SK_MaxS32, -1}, {SK_NaN32, -1} };
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for (const SkIPoint& pt : test) {
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SkDebugf("pt: %d, %d %c= pt\n", pt.fX, pt.fY, pt == pt ? '=' : '!');
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}
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#StdOut
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pt: 0, 0 == pt
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pt: -1, -2 == pt
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pt: 2147483647, -1 == pt
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pt: -2147483648, -1 == pt
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##
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##
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#SeeAlso equals() operator!=(const SkIPoint& a, const SkIPoint& b)
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#Method ##
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# ------------------------------------------------------------------------------
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#Method bool operator!=(const SkIPoint& a, const SkIPoint& b)
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Returns true if a is not equivalent to b.
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#Param a IPoint to compare ##
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#Param b IPoint to compare ##
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#Return true if a.fX != b.fX or a.fY != b.fY ##
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#Example
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SkIPoint test[] = { {0, -0}, {-1, -2}, {SK_MaxS32, -1}, {SK_NaN32, -1} };
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for (const SkIPoint& pt : test) {
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SkDebugf("pt: %d, %d %c= pt\n", pt.fX, pt.fY, pt != pt ? '!' : '=');
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}
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#StdOut
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pt: 0, 0 == pt
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pt: -1, -2 == pt
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pt: 2147483647, -1 == pt
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pt: -2147483648, -1 == pt
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##
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##
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#SeeAlso operator==(const SkIPoint& a, const SkIPoint& b) equals()
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#Method ##
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# ------------------------------------------------------------------------------
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#Method SkIVector operator-(const SkIPoint& a, const SkIPoint& b)
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Returns IVector from b to a; computed as
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#Formula
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(a.fX - b.fX, a.fY - b.fY)
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##
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.
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Can also be used to subtract IVector from IVector, returning IVector.
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#Param a IPoint or IVector to subtract from ##
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#Param b IVector to subtract ##
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#Return IVector from b to a ##
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#Example
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#Height 64
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auto draw_lines = [=](const SkIPoint pts[], size_t count, SkPaint& paint) -> void {
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for (size_t i = 0; i < count - 1; ++i) {
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SkPoint p0, p1;
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p0.iset(pts[i]);
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p1.iset(pts[i + 1]);
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canvas->drawLine(p0, p1, paint);
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}
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};
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SkIPoint points[] = { { 3, 1 }, { 4, 2 }, { 5, 1 }, { 7, 3 } };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->scale(30, 15);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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points[1] += points[0] - points[3];
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points[2] -= points[1] - points[0];
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paint.setColor(SK_ColorRED);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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##
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#SeeAlso operator-=(const SkIVector& v)
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#Method ##
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# ------------------------------------------------------------------------------
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#Method SkIPoint operator+(const SkIPoint& a, const SkIVector& b)
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Returns IPoint resulting from IPoint a offset by IVector b, computed as:
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#Formula
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(a.fX + b.fX, a.fY + b.fY)
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##
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.
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Can also be used to offset IPoint b by IVector a, returning IPoint.
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Can also be used to add IVector to IVector, returning IVector.
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#Param a IPoint or IVector to add to ##
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#Param b IPoint or IVector to add ##
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#Return IPoint equal to a offset by b ##
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#Example
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#Height 128
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auto draw_lines = [=](const SkIPoint pts[], size_t count, SkPaint& paint) -> void {
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for (size_t i = 0; i < count - 1; ++i) {
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SkPoint p0, p1;
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p0.iset(pts[i]);
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p1.iset(pts[i + 1]);
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canvas->drawLine(p0, p1, paint);
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}
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};
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SkIPoint points[] = { { 3, 1 }, { 4, 2 }, { 5, 1 }, { 7, 3 } };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->scale(30, 15);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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SkIPoint mod = {4, 1};
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for (auto& point : points) {
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point = point + mod;
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mod.fX -= 1;
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mod.fY += 1;
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}
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paint.setColor(SK_ColorRED);
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draw_lines(points, SK_ARRAY_COUNT(points), paint);
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##
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#SeeAlso operator+=(const SkIVector& v)
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#Method ##
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#Struct SkIPoint ##
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#Topic IPoint ##
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#Topic IVector
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#Alias IVectors
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#Typedef SkIPoint SkIVector
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#Typedef ##
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##
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