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Unified Diff: include/core/SkCanvas.h

Issue 1992283002: Add drawBitmapLattice() API (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Add implementation for SkRecorder and SkPictureRecord Created 4 years, 5 months ago
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Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 97aa3c7d8e343e06a1464615fb6edc788afc8148..df382add2acfe080100d37075a4dc8976320d96d 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -919,7 +919,7 @@ public:
SrcRectConstraint = kStrict_SrcRectConstraint);
/**
- * Draw the bitmap stretched differentially to fit into dst.
+ * Draw the bitmap stretched or shrunk differentially to fit into dst.
* center is a rect within the bitmap, and logically divides the bitmap
* into 9 sections (3x3). For example, if the middle pixel of a [5x5]
* bitmap is the "center", then the center-rect should be [2, 2, 3, 3].
@@ -935,6 +935,45 @@ public:
void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, const SkRect& dst,
const SkPaint* paint = NULL);
+ /**
+ * Specifies coordinates to divide a bitmap into (xCount*yCount) patches.
+ */
+ struct NinePatchDivs {
reed1 2016/08/01 16:26:02 drawBitmapLattice
msarett 2016/08/01 23:25:09 Done.
+ // An array of x-coordinates that divide the bitmap vertically.
+ // These must be unique, increasing, and in the set [0, width].
+ // Does not have ownership.
+ int* fXDivs;
reed1 2016/08/01 16:26:02 const
msarett 2016/08/01 23:25:09 Done.
+
+ // The number of fXDivs.
+ int fXCount;
+
+ // An array of y-coordinates that divide the bitmap horiztonally.
+ // These must be unique, increasing, and in the set [0, height].
+ // Does not have ownership.
+ int* fYDivs;
+
+ // The number of fYDivs.
+ int fYCount;
+ };
+
+ /**
+ * Draw the bitmap stretched or shrunk differentially to fit into dst.
+ *
+ * Moving horizontally across the bitmap, alternating patches will be "scalable"
+ * (in the x-dimension) to fit into dst or must be left "fixed". The first patch
+ * is treated as "fixed", but it's possible to specify an empty first patch by
+ * making divs.fXDivs[0] = 0.
+ *
+ * The scale factor for all "scalable" patches will be the same, and may be greater
+ * than or less than 1 (meaning we can stretch or shrink). If the number of
+ * "fixed" pixels is greater than the width of the dst, we will collapse all of
+ * the "scalable" regions and appropriately downscale the "fixed" regions.
+ *
+ * The same interpretation also applies to the y-dimension.
+ */
+ void drawBitmapNine(const SkBitmap& bitmap, const NinePatchDivs& divs, const SkRect& dst,
reed1 2016/07/15 16:27:04 "Nine" is sort of a misnomer here
msarett 2016/08/01 23:25:09 Acknowledged.
+ const SkPaint* paint = nullptr);
+
/** Draw the text, with origin at (x,y), using the specified paint.
The origin is interpreted based on the Align setting in the paint.
@param text The text to be drawn
@@ -1376,6 +1415,8 @@ protected:
SrcRectConstraint);
virtual void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
const SkPaint*);
+ virtual void onDrawBitmapNine(const SkBitmap&, const NinePatchDivs& divs, const SkRect& dst,
+ const SkPaint*);
enum ClipEdgeStyle {
kHard_ClipEdgeStyle,
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