Remove dead code in gpu/.

src/gpu/FlingState.cpp

Index: src/gpu/FlingState.cpp
diff --git a/src/gpu/FlingState.cpp b/src/gpu/FlingState.cpp
deleted file mode 100644
index f0db5016bde7a01b02f14a7f9fad7f6567062b41..0000000000000000000000000000000000000000
--- a/src/gpu/FlingState.cpp
+++ /dev/null
@@ -1,125 +0,0 @@
-
-/*
- * Copyright 2010 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-
-#include "FlingState.h"
-#include "SkMatrix.h"
-#include "SkTime.h"
-
-#define DISCRETIZE_TRANSLATE_TO_AVOID_FLICKER   true
-
-static const float MAX_FLING_SPEED = 1500;
-
-static float pin_max_fling(float speed) {
-    if (speed > MAX_FLING_SPEED) {
-        speed = MAX_FLING_SPEED;
-    }
-    return speed;
-}
-
-static double getseconds() {
-    return SkTime::GetMSecs() * 0.001;
-}
-
-// returns +1 or -1, depending on the sign of x
-// returns +1 if x is zero
-static SkScalar SkScalarSign(SkScalar x) {
-    SkScalar sign = SK_Scalar1;
-    if (x < 0) {
-        sign = -sign;
-    }
-    return sign;
-}
-
-static void unit_axis_align(SkVector* unit) {
-    const SkScalar TOLERANCE = SkDoubleToScalar(0.15);
-    if (SkScalarAbs(unit->fX) < TOLERANCE) {
-        unit->fX = 0;
-        unit->fY = SkScalarSign(unit->fY);
-    } else if (SkScalarAbs(unit->fY) < TOLERANCE) {
-        unit->fX = SkScalarSign(unit->fX);
-        unit->fY = 0;
-    }
-}
-
-void FlingState::reset(float sx, float sy) {
-    fActive = true;
-    fDirection.set(sx, sy);
-    fSpeed0 = SkPoint::Normalize(&fDirection);
-    fSpeed0 = pin_max_fling(fSpeed0);
-    fTime0 = getseconds();
-
-    unit_axis_align(&fDirection);
-//    printf("---- speed %g dir %g %g\n", fSpeed0, fDirection.fX, fDirection.fY);
-}
-
-bool FlingState::evaluateMatrix(SkMatrix* matrix) {
-    if (!fActive) {
-        return false;
-    }
-
-    const float t =  getseconds() - fTime0;
-    const float MIN_SPEED = 2;
-    const float K0 = 5.0;
-    const float K1 = 0.02;
-    const float speed = fSpeed0 * (sk_float_exp(- K0 * t) - K1);
-    if (speed <= MIN_SPEED) {
-        fActive = false;
-        return false;
-    }
-    float dist = (fSpeed0 - speed) / K0;
-
-//    printf("---- time %g speed %g dist %g\n", t, speed, dist);
-    float tx = fDirection.fX * dist;
-    float ty = fDirection.fY * dist;
-    if (DISCRETIZE_TRANSLATE_TO_AVOID_FLICKER) {
-        tx = sk_float_round2int(tx);
-        ty = sk_float_round2int(ty);
-    }
-    matrix->setTranslate(tx, ty);
-//    printf("---- evaluate (%g %g)\n", tx, ty);
-
-    return true;
-}
-
-////////////////////////////////////////
-
-GrAnimateFloat::GrAnimateFloat() : fTime0(0) {}
-
-void GrAnimateFloat::start(float v0, float v1, float duration) {
-    fValue0 = v0;
-    fValue1 = v1;
-    fDuration = duration;
-    if (duration > 0) {
-        fTime0 = SkTime::GetMSecs();
-        if (!fTime0) {
-            fTime0 = 1;  // time0 is our sentinel
-        }
-    } else {
-        fTime0 = 0;
-    }
-}
-
-float GrAnimateFloat::evaluate() {
-    if (!fTime0) {
-        return fValue1;
-    }
-
-    double elapsed = (SkTime::GetMSecs() - fTime0) * 0.001;
-    if (elapsed >= fDuration) {
-        fTime0 = 0;
-        return fValue1;
-    }
-
-    double t = elapsed / fDuration;
-    if (true) {
-        t = (3 - 2 * t) * t * t;
-    }
-    return fValue0 + t * (fValue1 - fValue0);
-}