The Tor Browser: gfx/skia/trunk/src/animator/SkDisplayRandom.cpp@a63d609f5ebe

     2 /*

     3  * Copyright 2006 The Android Open Source Project

     4  *

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

     6  * found in the LICENSE file.

     7  */

    10 #include "SkDisplayRandom.h"

    11 #include "SkInterpolator.h"

    13 enum SkDisplayRandom_Properties {

    14     SK_PROPERTY(random),

    15     SK_PROPERTY(seed)

    16 };

    18 #if SK_USE_CONDENSED_INFO == 0

    20 const SkMemberInfo SkDisplayRandom::fInfo[] = {

    21     SK_MEMBER(blend, Float),

    22     SK_MEMBER(max, Float),

    23     SK_MEMBER(min, Float),

    24     SK_MEMBER_DYNAMIC_PROPERTY(random, Float),

    25     SK_MEMBER_PROPERTY(seed, Int)

    26 };

    28 #endif

    30 DEFINE_GET_MEMBER(SkDisplayRandom);

    32 SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) {

    33 }

    35 #ifdef SK_DUMP_ENABLED

    36 void SkDisplayRandom::dump(SkAnimateMaker* maker) {

    37     dumpBase(maker);

    38     SkDebugf("min=\"%g\" ", SkScalarToFloat(min));

    39     SkDebugf("max=\"%g\" ", SkScalarToFloat(max));

    40     SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend));

    41     SkDebugf("/>\n");

    42 }

    43 #endif

    45 bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const {

    46     switch(index) {

    47         case SK_PROPERTY(random): {

    48             SkScalar random = fRandom.nextUScalar1();

    49             SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend);

    50             value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT);

    51             value->fType = SkType_Float;

    52             return true;

    53         }

    54         default:

    55             SkASSERT(0);

    56     }

    57     return false;

    58 }

    60 bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) {

    61     SkASSERT(index == SK_PROPERTY(seed));

    62     SkASSERT(value.fType == SkType_Int);

    63     fRandom.setSeed(value.fOperand.fS32);

    64     return true;

    65 }

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