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text: update comments

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Hajime Hoshi 2023-05-30 17:50:08 +09:00
parent f446288e0c
commit 11e79f3b51
1 changed files with 6 additions and 6 deletions
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12
text/text.go
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@ -143,9 +143,8 @@ var textM sync.Mutex
// Draw draws a given text on a given destination image dst.
//
// face is the font for text rendering.
// (x, y) represents a 'dot' (period) position.
// This means that if the given text consisted of a single character ".",
// it would be positioned at the given position (x, y).
// (x, y) represents a dot position in this figure:
// https://developer.apple.com/library/archive/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyphterms_2x.png.
// Be careful that this doesn't represent upper-left corner position.
//
// clr is the color for text rendering.
@ -186,7 +185,8 @@ func Draw(dst *ebiten.Image, text string, face font.Face, x, y int, clr color.Co
//
// face is the font for text rendering.
// op is the options to draw glyph images.
// The origin point is a 'dot' (period) position.
// The origin point is a dot position in this figure:
// https://developer.apple.com/library/archive/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyphterms_2x.png.
// Be careful that the origin point is not upper-left corner position of dst.
// The default glyph color is white. op's ColorM adjusts the color.
//
@ -273,8 +273,8 @@ func DrawWithOptions(dst *ebiten.Image, text string, face font.Face, options *eb
// BoundString returns the measured size of a given string using a given font.
// This method will return the exact size in pixels that a string drawn by Draw will be.
// The bound's origin point indicates the dot (period) position.
// This means that if the text consists of one character '.', this dot is rendered at (0, 0).
// The bound's origin point indicates the dot position in this figure:
// https://developer.apple.com/library/archive/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyphterms_2x.png.
//
// BoundString behaves almost exactly like golang.org/x/image/font's BoundString,
// but newline characters '\n' in the input string move the text position to the following line.