skia2/docs/examples/Canvas_drawTextRSXform.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

26 lines
974 B
C++

// 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 "tools/fiddle/examples.h"
// HASH=935c8f8b9782d297a73d7186f6ef7945
REG_FIDDLE(Canvas_drawTextRSXform, 256, 256, false, 0) {
void draw(SkCanvas* canvas) {
const int iterations = 26;
SkRSXform transforms[iterations];
char alphabet[iterations];
SkScalar angle = 0;
SkScalar scale = 1;
for (size_t i = 0; i < SK_ARRAY_COUNT(transforms); ++i) {
const SkScalar s = SkScalarSin(angle) * scale;
const SkScalar c = SkScalarCos(angle) * scale;
transforms[i] = SkRSXform::Make(-c, -s, -s * 16, c * 16);
angle += .45f;
scale += .2f;
alphabet[i] = 'A' + i;
}
SkPaint paint;
SkFont font(nullptr, 20);
auto spiral = SkTextBlob::MakeFromRSXform(alphabet, sizeof(alphabet), transforms, font);
canvas->drawTextBlob(spiral, 110, 138, paint);
}
} // END FIDDLE