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/Canvas_015.cpp b/docs/examples/Canvas_015.cpp
new file mode 100644
index 0000000..e40b257
--- /dev/null
+++ b/docs/examples/Canvas_015.cpp
@@ -0,0 +1,33 @@
+// 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=4486d0c0b22ad2931db130f42da4c80c
+REG_FIDDLE(Canvas_015, 256, 256, true, 0) {
+static void DeleteCallback(void*, void* context) {
+ delete (char*) context;
+}
+class CustomAllocator : public SkRasterHandleAllocator {
+public:
+ bool allocHandle(const SkImageInfo& info, Rec* rec) override {
+ char* context = new char[4]{'s', 'k', 'i', 'a'};
+ rec->fReleaseProc = DeleteCallback;
+ rec->fReleaseCtx = context;
+ rec->fHandle = context;
+ rec->fPixels = context;
+ rec->fRowBytes = 4;
+ return true;
+ }
+ void updateHandle(Handle handle, const SkMatrix& ctm, const SkIRect& clip_bounds) override {
+ // apply canvas matrix and clip to custom environment
+ }
+};
+
+void draw(SkCanvas* canvas) {
+ const SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1);
+ std::unique_ptr<SkCanvas> c2 =
+ SkRasterHandleAllocator::MakeCanvas(std::unique_ptr<CustomAllocator>(
+ new CustomAllocator()), info);
+ char* context = (char*) c2->accessTopRasterHandle();
+ SkDebugf("context = %.4s\n", context);
+}
+} // END FIDDLE