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/ImageInfo_037.cpp b/docs/examples/ImageInfo_037.cpp
new file mode 100644
index 0000000..e75e23d
--- /dev/null
+++ b/docs/examples/ImageInfo_037.cpp
@@ -0,0 +1,29 @@
+// 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=e72db006f1bea26feceaef8727ff9818
+REG_FIDDLE(ImageInfo_037, 256, 256, false, 3) {
+void draw(SkCanvas* canvas) {
+ const int width = 256;
+ const int height = 128;
+ SkColor pixels[height][width];
+ for (int y = 0; y < height; ++y) {
+ for (int x = 0; x < width; ++x) {
+ int red = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarSin((x * 4 + y) * 0.03f)));
+ int blue = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarCos((x * 3 + y) * 0.04f)));
+ int green = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarSin((x * 2 + y) * 0.05f)));
+ int alpha = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarCos((x * 1 + y) * 0.006f)));
+ pixels[y][x] =
+ SkColorSetARGB(alpha, red * alpha / 255, green * alpha / 255, blue * alpha / 255);
+ }
+ }
+ SkBitmap bitmap;
+ SkImageInfo info = SkImageInfo::Make(width, height, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
+ bitmap.installPixels(info, (void*) pixels, sizeof(SkColor) * width);
+ canvas->drawBitmap(source, 0, 0);
+ canvas->drawBitmap(bitmap, 0, 0);
+ SkImageInfo unpremulInfo = info.makeAlphaType(kUnpremul_SkAlphaType);
+ bitmap.installPixels(unpremulInfo, (void*) pixels, sizeof(SkColor) * width);
+ canvas->drawBitmap(bitmap, 0, 128);
+}
+} // END FIDDLE