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/Matrix_101.cpp b/docs/examples/Matrix_101.cpp
new file mode 100644
index 0000000..de87d8f
--- /dev/null
+++ b/docs/examples/Matrix_101.cpp
@@ -0,0 +1,22 @@
+// 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=139b874da0a3ede1f3df88119085c0aa
+REG_FIDDLE(Matrix_101, 256, 256, true, 0) {
+void draw(SkCanvas* canvas) {
+ SkMatrix matrix;
+ matrix.setRotate(90 * SK_Scalar1);
+ matrix.postScale(1.f / 4, 1.f / 2);
+ matrix.dump();
+ SkSize scale = {SK_ScalarNaN, SK_ScalarNaN};
+ SkMatrix remaining;
+ remaining.reset();
+ bool success = matrix.decomposeScale(&scale, &remaining);
+ SkDebugf("success: %s ", success ? "true" : "false");
+ SkDebugf("scale: %g, %g\n", scale.width(), scale.height());
+ remaining.dump();
+ SkMatrix scaleMatrix = SkMatrix::MakeScale(scale.width(), scale.height());
+ SkMatrix combined = SkMatrix::Concat(scaleMatrix, remaining);
+ combined.dump();
+}
+} // END FIDDLE