remove unused TableMaskFilter

src/effects/SkTableMaskFilter.cpp

-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkFixed.h"
-#include "SkReadBuffer.h"
-#include "SkString.h"
-#include "SkTableMaskFilter.h"
-#include "SkWriteBuffer.h"
-
-SkTableMaskFilter::SkTableMaskFilter() {
-    for (int i = 0; i < 256; i++) {
-        fTable[i] = i;
-    }
-}
-
-SkTableMaskFilter::SkTableMaskFilter(const uint8_t table[256]) {
-    memcpy(fTable, table, sizeof(fTable));
-}
-
-SkTableMaskFilter::~SkTableMaskFilter() {}
-
-bool SkTableMaskFilter::filterMask(SkMask* dst, const SkMask& src,
-                                 const SkMatrix&, SkIPoint* margin) const {
-    if (src.fFormat != SkMask::kA8_Format) {
-        return false;
-    }
-
-    dst->fBounds = src.fBounds;
-    dst->fRowBytes = SkAlign4(dst->fBounds.width());
-    dst->fFormat = SkMask::kA8_Format;
-    dst->fImage = nullptr;
-
-    if (src.fImage) {
-        dst->fImage = SkMask::AllocImage(dst->computeImageSize());
-
-        const uint8_t* srcP = src.fImage;
-        uint8_t* dstP = dst->fImage;
-        const uint8_t* table = fTable;
-        int dstWidth = dst->fBounds.width();
-        int extraZeros = dst->fRowBytes - dstWidth;
-
-        for (int y = dst->fBounds.height() - 1; y >= 0; --y) {
-            for (int x = dstWidth - 1; x >= 0; --x) {
-                dstP[x] = table[srcP[x]];
-            }
-            srcP += src.fRowBytes;
-            // we can't just inc dstP by rowbytes, because if it has any
-            // padding between its width and its rowbytes, we need to zero those
-            // so that the bitters can read those safely if that is faster for
-            // them
-            dstP += dstWidth;
-            for (int i = extraZeros - 1; i >= 0; --i) {
-                *dstP++ = 0;
-            }
-        }
-    }
-
-    if (margin) {
-        margin->set(0, 0);
-    }
-    return true;
-}
-
-SkMask::Format SkTableMaskFilter::getFormat() const {
-    return SkMask::kA8_Format;
-}
-
-void SkTableMaskFilter::flatten(SkWriteBuffer& wb) const {
-    wb.writeByteArray(fTable, 256);
-}
-
-sk_sp<SkFlattenable> SkTableMaskFilter::CreateProc(SkReadBuffer& buffer) {
-    uint8_t table[256];
-    if (!buffer.readByteArray(table, 256)) {
-        return nullptr;
-    }
-    return sk_sp<SkFlattenable>(Create(table));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-void SkTableMaskFilter::MakeGammaTable(uint8_t table[256], SkScalar gamma) {
-    const float dx = 1 / 255.0f;
-    const float g = SkScalarToFloat(gamma);
-
-    float x = 0;
-    for (int i = 0; i < 256; i++) {
-     // float ee = powf(x, g) * 255;
-        table[i] = SkTPin(sk_float_round2int(powf(x, g) * 255), 0, 255);
-        x += dx;
-    }
-}
-
-void SkTableMaskFilter::MakeClipTable(uint8_t table[256], uint8_t min,
-                                      uint8_t max) {
-    if (0 == max) {
-        max = 1;
-    }
-    if (min >= max) {
-        min = max - 1;
-    }
-    SkASSERT(min < max);
-
-    SkFixed scale = (1 << 16) * 255 / (max - min);
-    memset(table, 0, min + 1);
-    for (int i = min + 1; i < max; i++) {
-        int value = SkFixedRoundToInt(scale * (i - min));
-        SkASSERT(value <= 255);
-        table[i] = value;
-    }
-    memset(table + max, 255, 256 - max);
-
-#if 0
-    int j;
-    for (j = 0; j < 256; j++) {
-        if (table[j]) {
-            break;
-        }
-    }
-    SkDebugf("%d %d start [%d]", min, max, j);
-    for (; j < 256; j++) {
-        SkDebugf(" %d", table[j]);
-    }
-    SkDebugf("\n\n");
-#endif
-}
-
-#ifndef SK_IGNORE_TO_STRING
-void SkTableMaskFilter::toString(SkString* str) const {
-    str->append("SkTableMaskFilter: (");
-
-    str->append("table: ");
-    for (int i = 0; i < 255; ++i) {
-        str->appendf("%d, ", fTable[i]);
-    }
-    str->appendf("%d", fTable[255]);
-
-    str->append(")");
-}
-#endif