The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/core/SkDrawLooper.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,61 @@
     1.4 +/*
     1.5 + * Copyright 2013 Google Inc.
     1.6 + *
     1.7 + * Use of this source code is governed by a BSD-style license that can be
     1.8 + * found in the LICENSE file.
     1.9 + */
    1.10 +
    1.11 +#include "SkDrawLooper.h"
    1.12 +#include "SkCanvas.h"
    1.13 +#include "SkMatrix.h"
    1.14 +#include "SkPaint.h"
    1.15 +#include "SkRect.h"
    1.16 +#include "SkSmallAllocator.h"
    1.17 +
    1.18 +bool SkDrawLooper::canComputeFastBounds(const SkPaint& paint) const {
    1.19 +    SkCanvas canvas;
    1.20 +    SkSmallAllocator<1, 32> allocator;
    1.21 +    void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize());
    1.22 +
    1.23 +    SkDrawLooper::Context* context = this->createContext(&canvas, buffer);
    1.24 +    for (;;) {
    1.25 +        SkPaint p(paint);
    1.26 +        if (context->next(&canvas, &p)) {
    1.27 +            p.setLooper(NULL);
    1.28 +            if (!p.canComputeFastBounds()) {
    1.29 +                return false;
    1.30 +            }
    1.31 +        } else {
    1.32 +            break;
    1.33 +        }
    1.34 +    }
    1.35 +    return true;
    1.36 +}
    1.37 +
    1.38 +void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& src,
    1.39 +                                     SkRect* dst) const {
    1.40 +    SkCanvas canvas;
    1.41 +    SkSmallAllocator<1, 32> allocator;
    1.42 +    void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize());
    1.43 +
    1.44 +    *dst = src;   // catch case where there are no loops
    1.45 +    SkDrawLooper::Context* context = this->createContext(&canvas, buffer);
    1.46 +    for (bool firstTime = true;; firstTime = false) {
    1.47 +        SkPaint p(paint);
    1.48 +        if (context->next(&canvas, &p)) {
    1.49 +            SkRect r(src);
    1.50 +
    1.51 +            p.setLooper(NULL);
    1.52 +            p.computeFastBounds(r, &r);
    1.53 +            canvas.getTotalMatrix().mapRect(&r);
    1.54 +
    1.55 +            if (firstTime) {
    1.56 +                *dst = r;
    1.57 +            } else {
    1.58 +                dst->join(r);
    1.59 +            }
    1.60 +        } else {
    1.61 +            break;
    1.62 +        }
    1.63 +    }
    1.64 +}