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Documentation: SkCanvas

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Change-Id: Ibbbcc37c38178bca3b6cf7bd81eb0a1a4fc2a882
Reviewed-on: https://skia-review.googlesource.com/c/181560
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
This commit is contained in:
Hal Canary 2019-01-07 09:30:27 -05:00 committed by Skia Commit-Bot
parent e99e8dae06
commit 077dd3a5d4
1 changed files with 53 additions and 11 deletions
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64
include/core/SkCanvas.h
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@ -1846,18 +1846,19 @@ public:
const SkPaint& paint);
#endif // SK_SUPPORT_LEGACY_CANVAS_DRAW_TEXT
/** Draws text, with origin at (x, y), using clip, SkMatrix, and SkPaint paint.
/** Experimental.
text meaning depends on SkTextEncoding; by default, text is encoded as
UTF-8.
Draws text, with origin at (x, y), using clip, SkMatrix, SkFont font,
and SkPaint paint.
x and y meaning depends on SkPaint::Align and SkPaint vertical text; by default
text draws left to right, positioning the first glyph left side bearing at x
and its baseline at y. Text size is affected by SkMatrix and SkPaint text size.
Text meaning depends on SkTextEncoding.
Text size is affected by SkMatrix and SkFont text size. Default text
size is 12 point.
All elements of paint: SkPathEffect, SkMaskFilter, SkShader,
SkColorFilter, SkImageFilter, and SkDrawLooper; apply to text. By default, draws
filled 12 point black glyphs.
SkColorFilter, SkImageFilter, and SkDrawLooper; apply to text. By
default, draws filled black glyphs.
@param text character code points or glyphs drawn
@param byteLength byte length of text array
@ -1866,16 +1867,57 @@ public:
@param y start of text on y-axis
@param font typeface, text size and so, used to describe the text
@param paint blend, color, and so on, used to draw
*/
*/
void drawSimpleText(const void* text, size_t byteLength, SkTextEncoding encoding,
SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint);
// Experimental
/** Experimental.
Draws null terminated string, with origin at (x, y), using clip, SkMatrix,
SkFont font, and SkPaint paint.
String str is encoded as UTF-8.
Text size is affected by SkMatrix and font text size. Default text
size is 12 point.
All elements of paint: SkPathEffect, SkMaskFilter, SkShader,
SkColorFilter, SkImageFilter, and SkDrawLooper; apply to text. By
default, draws filled black glyphs.
@param str character code points drawn,
ending with a char value of zero
@param x start of string on x-axis
@param y start of string on y-axis
@param font typeface, text size and so, used to describe the text
@param paint blend, color, and so on, used to draw
*/
void drawString(const char str[], SkScalar x, SkScalar y, const SkFont& font,
const SkPaint& paint) {
this->drawSimpleText(str, strlen(str), kUTF8_SkTextEncoding, x, y, font, paint);
}
// Experimental
/** Experimental.
Draws SkString, with origin at (x, y), using clip, SkMatrix, SkFont font,
and SkPaint paint.
SkString str is encoded as UTF-8.
Text size is affected by SkMatrix and SkFont text size. Default text
size is 12 point.
All elements of paint: SkPathEffect, SkMaskFilter, SkShader,
SkColorFilter, SkImageFilter, and SkDrawLooper; apply to text. By
default, draws filled black glyphs.
@param str character code points drawn,
ending with a char value of zero
@param x start of string on x-axis
@param y start of string on y-axis
@param font typeface, text size and so, used to describe the text
@param paint blend, color, and so on, used to draw
*/
void drawString(const SkString& str, SkScalar x, SkScalar y, const SkFont& font,
const SkPaint& paint) {
this->drawSimpleText(str.c_str(), str.size(), kUTF8_SkTextEncoding, x, y, font, paint);