The Tor Browser: gfx/skia/trunk/src/core/SkDrawLooper.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /*

     2  * Copyright 2013 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #include "SkDrawLooper.h"

     9 #include "SkCanvas.h"

    10 #include "SkMatrix.h"

    11 #include "SkPaint.h"

    12 #include "SkRect.h"

    13 #include "SkSmallAllocator.h"

    15 bool SkDrawLooper::canComputeFastBounds(const SkPaint& paint) const {

    16     SkCanvas canvas;

    17     SkSmallAllocator<1, 32> allocator;

    18     void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize());

    20     SkDrawLooper::Context* context = this->createContext(&canvas, buffer);

    21     for (;;) {

    22         SkPaint p(paint);

    23         if (context->next(&canvas, &p)) {

    24             p.setLooper(NULL);

    25             if (!p.canComputeFastBounds()) {

    26                 return false;

    27             }

    28         } else {

    29             break;

    30         }

    31     }

    32     return true;

    33 }

    35 void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& src,

    36                                      SkRect* dst) const {

    37     SkCanvas canvas;

    38     SkSmallAllocator<1, 32> allocator;

    39     void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize());

    41     *dst = src;   // catch case where there are no loops

    42     SkDrawLooper::Context* context = this->createContext(&canvas, buffer);

    43     for (bool firstTime = true;; firstTime = false) {

    44         SkPaint p(paint);

    45         if (context->next(&canvas, &p)) {

    46             SkRect r(src);

    48             p.setLooper(NULL);

    49             p.computeFastBounds(r, &r);

    50             canvas.getTotalMatrix().mapRect(&r);

    52             if (firstTime) {

    53                 *dst = r;

    54             } else {

    55                 dst->join(r);

    56             }

    57         } else {

    58             break;

    59         }

    60     }

    61 }

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