Compile all fiddle examples locally
Motivation: it would be a good idea if the API documentation examples
were checked into the skia repository, so we could make sure they
compile as part of the commit queue.
Fiddle would make/update a named fiddle each time it gets a new
commit of Skia, extracted from the code in the examples/ directory.
The docs would point at those named fiddles. Named fiddles have urls
in the form:
https://fiddle.skia.org/c/@Bitmap_000
Then we would stick a link to the example into the header documentation
like this:
/** Allocates the pixel memory for the bitmap, given its dimensions
and SkColorType. Returns true on success, where success means
either setPixels() or setPixelRef() was called.
@param bitmap SkBitmap containing SkImageInfo as input, and
SkPixelRef as output
@return true if SkPixelRef was allocated
@example https://fiddle.skia.org/c/@Bitmap_000
*/
bool allocPixelRef(SkBitmap* bitmap) override;
There are still around 200 disabled examples that need to be fixed
(these result from API changes since the author left).
Change-Id: I14a31348a9ccaaa31f65424b91e3a3533d2583a7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/198824
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
diff --git a/docs/examples/Paint_050.cpp b/docs/examples/Paint_050.cpp
new file mode 100644
index 0000000..1cdc48c
--- /dev/null
+++ b/docs/examples/Paint_050.cpp
@@ -0,0 +1,36 @@
+// Copyright 2019 Google LLC.
+// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
+#include "fiddle/examples.h"
+// HASH=5de2de0f00354e59074a9bb1a42d5a63
+REG_FIDDLE(Paint_050, 384, 170, false, 0) {
+void draw(SkCanvas* canvas) {
+ SkPoint pts[] = {{ 10, 50 }, { 110, 80 }, { 10, 110 }};
+ SkVector v[] = { pts[0] - pts[1], pts[2] - pts[1] };
+ SkScalar angle1 = SkScalarATan2(v[0].fY, v[0].fX);
+ SkScalar angle2 = SkScalarATan2(v[1].fY, v[1].fX);
+ const SkScalar strokeWidth = 20;
+ SkScalar miterLimit = 1 / SkScalarSin((angle2 - angle1) / 2);
+ SkScalar miterLength = strokeWidth * miterLimit;
+ SkPath path;
+ path.moveTo(pts[0]);
+ path.lineTo(pts[1]);
+ path.lineTo(pts[2]);
+ SkPaint paint; // set to default kMiter_Join
+ paint.setAntiAlias(true);
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setStrokeMiter(miterLimit);
+ paint.setStrokeWidth(strokeWidth);
+ canvas->drawPath(path, paint);
+ paint.setStrokeWidth(1);
+ canvas->drawLine(pts[1].fX - miterLength / 2, pts[1].fY + 50,
+ pts[1].fX + miterLength / 2, pts[1].fY + 50, paint);
+ canvas->translate(200, 0);
+ miterLimit *= 0.99f;
+ paint.setStrokeMiter(miterLimit);
+ paint.setStrokeWidth(strokeWidth);
+ canvas->drawPath(path, paint);
+ paint.setStrokeWidth(1);
+ canvas->drawLine(pts[1].fX - miterLength / 2, pts[1].fY + 50,
+ pts[1].fX + miterLength / 2, pts[1].fY + 50, paint);
+}
+} // END FIDDLE