Remove all KTX support

It is untested and unused.

Change-Id: I010ff4ad942738f362d42a99af4edbbb1cb0cd71
Reviewed-on: https://skia-review.googlesource.com/6142
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Robert Phillips <robertphillips@google.com>

2 files changed, 0 insertions, 710 deletions

diff --git a/third_party/ktx/ktx.cpp b/third_party/ktx/ktx.cpp
deleted file mode 100644
index ba3ba1fc27..0000000000
--- a/third_party/ktx/ktx.cpp
+++ /dev/null
@@ -1,565 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "ktx.h"
-#include "SkBitmap.h"
-#include "SkStream.h"
-#include "SkEndian.h"
-
-#include "gl/GrGLDefines.h"
-#include "GrConfig.h"
-
-#include "etc1.h"
-
-static inline uint32_t compressed_fmt_to_gl_define(SkTextureCompressor::Format fmt) {
-    static const uint32_t kGLDefineMap[SkTextureCompressor::kFormatCnt] = {
-        GR_GL_COMPRESSED_LUMINANCE_LATC1,      // kLATC_Format
-        GR_GL_COMPRESSED_R11_EAC,              // kR11_EAC_Format
-        GR_GL_COMPRESSED_ETC1_RGB8,            // kETC1_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_4x4,        // kASTC_4x4_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_5x4,        // kASTC_5x4_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_5x5,        // kASTC_5x5_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_6x5,        // kASTC_6x5_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_6x6,        // kASTC_6x6_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_8x5,        // kASTC_8x5_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_8x6,        // kASTC_8x6_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_8x8,        // kASTC_8x8_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_10x5,       // kASTC_10x5_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_10x6,       // kASTC_10x6_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_10x8,       // kASTC_10x8_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_10x10,      // kASTC_10x10_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_12x10,      // kASTC_12x10_Format
-        GR_GL_COMPRESSED_RGBA_ASTC_12x12,      // kASTC_12x12_Format
-    };
-
-    GR_STATIC_ASSERT(0 == SkTextureCompressor::kLATC_Format);
-    GR_STATIC_ASSERT(1 == SkTextureCompressor::kR11_EAC_Format);
-    GR_STATIC_ASSERT(2 == SkTextureCompressor::kETC1_Format);
-    GR_STATIC_ASSERT(3 == SkTextureCompressor::kASTC_4x4_Format);
-    GR_STATIC_ASSERT(4 == SkTextureCompressor::kASTC_5x4_Format);
-    GR_STATIC_ASSERT(5 == SkTextureCompressor::kASTC_5x5_Format);
-    GR_STATIC_ASSERT(6 == SkTextureCompressor::kASTC_6x5_Format);
-    GR_STATIC_ASSERT(7 == SkTextureCompressor::kASTC_6x6_Format);
-    GR_STATIC_ASSERT(8 == SkTextureCompressor::kASTC_8x5_Format);
-    GR_STATIC_ASSERT(9 == SkTextureCompressor::kASTC_8x6_Format);
-    GR_STATIC_ASSERT(10 == SkTextureCompressor::kASTC_8x8_Format);
-    GR_STATIC_ASSERT(11 == SkTextureCompressor::kASTC_10x5_Format);
-    GR_STATIC_ASSERT(12 == SkTextureCompressor::kASTC_10x6_Format);
-    GR_STATIC_ASSERT(13 == SkTextureCompressor::kASTC_10x8_Format);
-    GR_STATIC_ASSERT(14 == SkTextureCompressor::kASTC_10x10_Format);
-    GR_STATIC_ASSERT(15 == SkTextureCompressor::kASTC_12x10_Format);
-    GR_STATIC_ASSERT(16 == SkTextureCompressor::kASTC_12x12_Format);
-    GR_STATIC_ASSERT(SK_ARRAY_COUNT(kGLDefineMap) == SkTextureCompressor::kFormatCnt);
-
-    return kGLDefineMap[fmt];
-}
-
-#define KTX_FILE_IDENTIFIER_SIZE 12
-static const uint8_t KTX_FILE_IDENTIFIER[KTX_FILE_IDENTIFIER_SIZE] = {
-    0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A
-};
-
-static const uint32_t kKTX_ENDIANNESS_CODE = 0x04030201;
-
-bool SkKTXFile::KeyValue::readKeyAndValue(const uint8_t* data) {
-    const char *key = reinterpret_cast<const char *>(data);
-    const char *value = key;
-
-    size_t bytesRead = 0;
-    while (*value != '\0' && bytesRead < this->fDataSz) {
-        ++bytesRead;
-        ++value;
-    }
-
-    // Error of some sort..
-    if (bytesRead >= this->fDataSz) {
-        return false;
-    }
-
-    // Read the zero terminator
-    ++bytesRead;
-    ++value;
-
-    size_t bytesLeft = this->fDataSz - bytesRead;
-
-    // We ignore the null terminator when setting the string value.
-    this->fKey.set(key, bytesRead - 1);
-    if (bytesLeft > 0) {
-        this->fValue.set(value, bytesLeft - 1);
-    } else {
-        return false;
-    }
-
-    return true;
-}
-
-bool SkKTXFile::KeyValue::writeKeyAndValueForKTX(SkWStream* strm) {
-    size_t bytesWritten = 0;
-    if (!strm->write(&(this->fDataSz), 4)) {
-        return false;
-    }
-
-    bytesWritten += 4;
-
-    // Here we know that C-strings must end with a null terminating
-    // character, so when we get a c_str(), it will have as many
-    // bytes of data as size() returns plus a zero, so we just
-    // write size() + 1 bytes into the stream.
-
-    size_t keySize = this->fKey.size() + 1;
-    if (!strm->write(this->fKey.c_str(), keySize)) {
-        return false;
-    }
-
-    bytesWritten += keySize;
-
-    size_t valueSize = this->fValue.size() + 1;
-    if (!strm->write(this->fValue.c_str(), valueSize)) {
-        return false;
-    }
-
-    bytesWritten += valueSize;
-
-    size_t bytesWrittenPadFour = (bytesWritten + 3) & ~3;
-    uint8_t nullBuf[4] = { 0, 0, 0, 0 };
-
-    size_t padding = bytesWrittenPadFour - bytesWritten;
-    SkASSERT(padding < 4);
-
-    return strm->write(nullBuf, padding);
-}
-
-uint32_t SkKTXFile::readInt(const uint8_t** buf, size_t* bytesLeft) const {
-    SkASSERT(buf && bytesLeft);
-
-    uint32_t result;
-
-    if (*bytesLeft < 4) {
-        SkASSERT(false);
-        return 0;
-    }
-
-    memcpy(&result, *buf, 4);
-    *buf += 4;
-
-    if (fSwapBytes) {
-        SkEndianSwap32(result);
-    }
-
-    *bytesLeft -= 4;
-
-    return result;
-}
-
-SkString SkKTXFile::getValueForKey(const SkString& key) const {
-    const KeyValue *begin = this->fKeyValuePairs.begin();
-    const KeyValue *end = this->fKeyValuePairs.end();
-    for (const KeyValue *kv = begin; kv != end; ++kv) {
-        if (kv->key() == key) {
-            return kv->value();
-        }
-    }
-    return SkString();
-}
-
-bool SkKTXFile::isCompressedFormat(SkTextureCompressor::Format fmt) const {
-    if (!this->valid()) {
-        return false;
-    }
-
-    // This has many aliases
-    bool isFmt = false;
-    if (fmt == SkTextureCompressor::kLATC_Format) {
-        isFmt = GR_GL_COMPRESSED_RED_RGTC1 == fHeader.fGLInternalFormat ||
-                GR_GL_COMPRESSED_3DC_X == fHeader.fGLInternalFormat;
-    }
-
-    return isFmt || compressed_fmt_to_gl_define(fmt) == fHeader.fGLInternalFormat;
-}
-
-bool SkKTXFile::isRGBA8() const {
-    return this->valid() && GR_GL_RGBA8 == fHeader.fGLInternalFormat;
-}
-
-bool SkKTXFile::isRGB8() const {
-    return this->valid() && GR_GL_RGB8 == fHeader.fGLInternalFormat;
-}
-
-bool SkKTXFile::readKTXFile(const uint8_t* data, size_t dataLen) {
-    const uint8_t *buf = data;
-    size_t bytesLeft = dataLen;
-
-    // Make sure original KTX header is there... this should have been checked
-    // already by a call to is_ktx()
-    SkASSERT(bytesLeft > KTX_FILE_IDENTIFIER_SIZE);
-    SkASSERT(0 == memcmp(KTX_FILE_IDENTIFIER, buf, KTX_FILE_IDENTIFIER_SIZE));
-    buf += KTX_FILE_IDENTIFIER_SIZE;
-    bytesLeft -= KTX_FILE_IDENTIFIER_SIZE;
-
-    // Read header, but first make sure that we have the proper space: we need
-    // two 32-bit ints: 1 for endianness, and another for the mandatory image
-    // size after the header.
-    if (bytesLeft < 8 + sizeof(Header)) {
-        return false;
-    }
-
-    uint32_t endianness = this->readInt(&buf, &bytesLeft);
-    fSwapBytes = kKTX_ENDIANNESS_CODE != endianness;
-
-    // Read header values
-    fHeader.fGLType                = this->readInt(&buf, &bytesLeft);
-    fHeader.fGLTypeSize            = this->readInt(&buf, &bytesLeft);
-    fHeader.fGLFormat              = this->readInt(&buf, &bytesLeft);
-    fHeader.fGLInternalFormat      = this->readInt(&buf, &bytesLeft);
-    fHeader.fGLBaseInternalFormat  = this->readInt(&buf, &bytesLeft);
-    fHeader.fPixelWidth            = this->readInt(&buf, &bytesLeft);
-    fHeader.fPixelHeight           = this->readInt(&buf, &bytesLeft);
-    fHeader.fPixelDepth            = this->readInt(&buf, &bytesLeft);
-    fHeader.fNumberOfArrayElements = this->readInt(&buf, &bytesLeft);
-    fHeader.fNumberOfFaces         = this->readInt(&buf, &bytesLeft);
-    fHeader.fNumberOfMipmapLevels  = this->readInt(&buf, &bytesLeft);
-    fHeader.fBytesOfKeyValueData   = this->readInt(&buf, &bytesLeft);
-
-    // Check for things that we understand...
-    {
-        // First, we only support compressed formats and single byte
-        // representations at the moment. If the internal format is
-        // compressed, the the GLType field in the header must be zero.
-        // In the future, we may support additional data types (such
-        // as GL_UNSIGNED_SHORT_5_6_5)
-        if (fHeader.fGLType != 0 && fHeader.fGLType != GR_GL_UNSIGNED_BYTE) {
-            return false;
-        }
-
-        // This means that for well-formatted KTX files, the glTypeSize
-        // field must be one...
-        if (fHeader.fGLTypeSize != 1) {
-            return false;
-        }
-
-        // We don't support 3D textures.
-        if (fHeader.fPixelDepth > 1) {
-            return false;
-        }
-
-        // We don't support texture arrays
-        if (fHeader.fNumberOfArrayElements > 1) {
-            return false;
-        }
-
-        // We don't support cube maps
-        if (fHeader.fNumberOfFaces > 1) {
-            return false;
-        }
-
-        // We don't support width and/or height <= 0
-        if (fHeader.fPixelWidth <= 0 || fHeader.fPixelHeight <= 0) {
-            return false;
-        }
-    }
-
-    // Make sure that we have enough bytes left for the key/value
-    // data according to what was said in the header.
-    if (bytesLeft < fHeader.fBytesOfKeyValueData) {
-        return false;
-    }
-
-    // Next read the key value pairs
-    size_t keyValueBytesRead = 0;
-    while (keyValueBytesRead < fHeader.fBytesOfKeyValueData) {
-        uint32_t keyValueBytes = this->readInt(&buf, &bytesLeft);
-        keyValueBytesRead += 4;
-
-        if (keyValueBytes > bytesLeft) {
-            return false;
-        }
-
-        KeyValue kv(keyValueBytes);
-        if (!kv.readKeyAndValue(buf)) {
-            return false;
-        }
-
-        fKeyValuePairs.push_back(kv);
-
-        uint32_t keyValueBytesPadded = (keyValueBytes + 3) & ~3;
-        buf += keyValueBytesPadded;
-        keyValueBytesRead += keyValueBytesPadded;
-        bytesLeft -= keyValueBytesPadded;
-    }
-
-    // Read the pixel data...
-    int mipmaps = SkMax32(fHeader.fNumberOfMipmapLevels, 1);
-    SkASSERT(mipmaps == 1);
-
-    int arrayElements = SkMax32(fHeader.fNumberOfArrayElements, 1);
-    SkASSERT(arrayElements == 1);
-
-    int faces = SkMax32(fHeader.fNumberOfFaces, 1);
-    SkASSERT(faces == 1);
-
-    int depth = SkMax32(fHeader.fPixelDepth, 1);
-    SkASSERT(depth == 1);
-
-    for (int mipmap = 0; mipmap < mipmaps; ++mipmap) {
-        // Make sure that we have at least 4 more bytes for the first image size
-        if (bytesLeft < 4) {
-            return false;
-        }
-
-        uint32_t imgSize = this->readInt(&buf, &bytesLeft);
-
-        // Truncated file.
-        if (bytesLeft < imgSize) {
-            return false;
-        }
-
-        // !FIXME! If support is ever added for cube maps then the padding
-        // needs to be taken into account here.
-        for (int arrayElement = 0; arrayElement < arrayElements; ++arrayElement) {
-            for (int face = 0; face < faces; ++face) {
-                for (int z = 0; z < depth; ++z) {
-                    PixelData pd(buf, imgSize);
-                    fPixelData.append(1, &pd);
-                }
-            }
-        }
-
-        uint32_t imgSizePadded = (imgSize + 3) & ~3;
-        buf += imgSizePadded;
-        bytesLeft -= imgSizePadded;
-    }
-
-    return bytesLeft == 0;
-}
-
-bool SkKTXFile::is_ktx(const uint8_t data[], size_t size) {
-    return size >= KTX_FILE_IDENTIFIER_SIZE &&
-           0 == memcmp(KTX_FILE_IDENTIFIER, data, KTX_FILE_IDENTIFIER_SIZE);
-}
-
-bool SkKTXFile::is_ktx(SkStreamRewindable* stream) {
-    // Read the KTX header and make sure it's valid.
-    unsigned char buf[KTX_FILE_IDENTIFIER_SIZE];
-    bool largeEnough =
-        stream->read((void*)buf, KTX_FILE_IDENTIFIER_SIZE) == KTX_FILE_IDENTIFIER_SIZE;
-    stream->rewind();
-    if (!largeEnough) {
-        return false;
-    }
-    return is_ktx(buf, KTX_FILE_IDENTIFIER_SIZE);
-}
-
-SkKTXFile::KeyValue SkKTXFile::CreateKeyValue(const char *cstrKey, const char *cstrValue) {
-    SkString key(cstrKey);
-    SkString value(cstrValue);
-
-    // Size of buffer is length of string plus the null terminators...
-    size_t size = key.size() + 1 + value.size() + 1;
-
-    SkAutoSMalloc<256> buf(size);
-    uint8_t* kvBuf = reinterpret_cast<uint8_t*>(buf.get());
-    memcpy(kvBuf, key.c_str(), key.size() + 1);
-    memcpy(kvBuf + key.size() + 1, value.c_str(), value.size() + 1);
-
-    KeyValue kv(size);
-    SkAssertResult(kv.readKeyAndValue(kvBuf));
-    return kv;
-}
-
-bool SkKTXFile::WriteETC1ToKTX(SkWStream* stream, const uint8_t *etc1Data,
-                               uint32_t width, uint32_t height) {
-    // First thing's first, write out the magic identifier and endianness...
-    if (!stream->write(KTX_FILE_IDENTIFIER, KTX_FILE_IDENTIFIER_SIZE)) {
-        return false;
-    }
-
-    if (!stream->write(&kKTX_ENDIANNESS_CODE, 4)) {
-        return false;
-    }
-
-    Header hdr;
-    hdr.fGLType = 0;
-    hdr.fGLTypeSize = 1;
-    hdr.fGLFormat = 0;
-    hdr.fGLInternalFormat = GR_GL_COMPRESSED_ETC1_RGB8;
-    hdr.fGLBaseInternalFormat = GR_GL_RGB;
-    hdr.fPixelWidth = width;
-    hdr.fPixelHeight = height;
-    hdr.fNumberOfArrayElements = 0;
-    hdr.fNumberOfFaces = 1;
-    hdr.fNumberOfMipmapLevels = 1;
-
-    // !FIXME! The spec suggests that we put KTXOrientation as a
-    // key value pair in the header, but that means that we'd have to
-    // pipe through the pixmap's orientation to properly do that.
-    hdr.fBytesOfKeyValueData = 0;
-
-    // Write the header
-    if (!stream->write(&hdr, sizeof(hdr))) {
-        return false;
-    }
-
-    // Write the size of the image data
-    etc1_uint32 dataSize = etc1_get_encoded_data_size(width, height);
-    if (!stream->write(&dataSize, 4)) {
-        return false;
-    }
-
-    // Write the actual image data
-    if (!stream->write(etc1Data, dataSize)) {
-        return false;
-    }
-
-    return true;
-}
-
-bool SkKTXFile::WritePixmapToKTX(SkWStream* stream, const SkPixmap& pixmap) {
-    const SkColorType ct = pixmap.colorType();
-
-    const int width = pixmap.width();
-    const int height = pixmap.height();
-    const uint8_t* src = reinterpret_cast<const uint8_t*>(pixmap.addr());
-    if (!src) {
-        return false;
-    }
-    const size_t rowBytes = pixmap.rowBytes();
-    const int bytesPerPixel = pixmap.info().bytesPerPixel();
-
-    // First thing's first, write out the magic identifier and endianness...
-    if (!stream->write(KTX_FILE_IDENTIFIER, KTX_FILE_IDENTIFIER_SIZE) ||
-        !stream->write(&kKTX_ENDIANNESS_CODE, 4)) {
-        return false;
-    }
-
-    // Collect our key/value pairs...
-    SkTArray<KeyValue> kvPairs;
-
-    // Next, write the header based on the pixmap's config.
-    Header hdr;
-    switch (ct) {
-        case kIndex_8_SkColorType:
-            // There is a compressed format for this, but we don't support it yet.
-            SkDebugf("Writing indexed pixmap to KTX unsupported.\n");
-            // VVV fall through VVV
-        default:
-        case kUnknown_SkColorType:
-            // Pixmap hasn't been configured.
-            return false;
-
-        case kAlpha_8_SkColorType:
-            hdr.fGLType = GR_GL_UNSIGNED_BYTE;
-            hdr.fGLTypeSize = 1;
-            hdr.fGLFormat = GR_GL_RED;
-            hdr.fGLInternalFormat = GR_GL_R8;
-            hdr.fGLBaseInternalFormat = GR_GL_RED;
-            break;
-
-        case kRGB_565_SkColorType:
-            hdr.fGLType = GR_GL_UNSIGNED_SHORT_5_6_5;
-            hdr.fGLTypeSize = 2;
-            hdr.fGLFormat = GR_GL_RGB;
-            hdr.fGLInternalFormat = GR_GL_RGB;
-            hdr.fGLBaseInternalFormat = GR_GL_RGB;
-            break;
-
-        case kARGB_4444_SkColorType:
-            hdr.fGLType = GR_GL_UNSIGNED_SHORT_4_4_4_4;
-            hdr.fGLTypeSize = 2;
-            hdr.fGLFormat = GR_GL_RGBA;
-            hdr.fGLInternalFormat = GR_GL_RGBA4;
-            hdr.fGLBaseInternalFormat = GR_GL_RGBA;
-            kvPairs.push_back(CreateKeyValue("KTXPremultipliedAlpha", "True"));
-            break;
-
-        case kN32_SkColorType:
-            hdr.fGLType = GR_GL_UNSIGNED_BYTE;
-            hdr.fGLTypeSize = 1;
-            hdr.fGLFormat = GR_GL_RGBA;
-            hdr.fGLInternalFormat = GR_GL_RGBA8;
-            hdr.fGLBaseInternalFormat = GR_GL_RGBA;
-            kvPairs.push_back(CreateKeyValue("KTXPremultipliedAlpha", "True"));
-            break;
-    }
-
-    // Everything else in the header is shared.
-    hdr.fPixelWidth = width;
-    hdr.fPixelHeight = height;
-    hdr.fNumberOfArrayElements = 0;
-    hdr.fNumberOfFaces = 1;
-    hdr.fNumberOfMipmapLevels = 1;
-
-    // Calculate the key value data size
-    hdr.fBytesOfKeyValueData = 0;
-    for (KeyValue *kv = kvPairs.begin(); kv != kvPairs.end(); ++kv) {
-        // Key value size is the size of the key value data,
-        // four bytes for saying how big the key value size is
-        // and then additional bytes for padding to four byte boundary
-        size_t kvsize = kv->size();
-        kvsize += 4;
-        kvsize = (kvsize + 3) & ~3;
-        hdr.fBytesOfKeyValueData = SkToU32(hdr.fBytesOfKeyValueData + kvsize);
-    }
-
-    // Write the header
-    if (!stream->write(&hdr, sizeof(hdr))) {
-        return false;
-    }
-
-    // Write out each key value pair
-    for (KeyValue *kv = kvPairs.begin(); kv != kvPairs.end(); ++kv) {
-        if (!kv->writeKeyAndValueForKTX(stream)) {
-            return false;
-        }
-    }
-
-    // Calculate the size of the data
-    uint32_t dataSz = bytesPerPixel * width * height;
-
-    if (0 >= bytesPerPixel) {
-        return false;
-    }
-
-    // Write it into the buffer
-    if (!stream->write(&dataSz, 4)) {
-        return false;
-    }
-
-    // Write the pixel data...
-    const uint8_t* rowPtr = src;
-    if (kN32_SkColorType == ct) {
-        for (int j = 0; j < height; ++j) {
-            const uint32_t* pixelsPtr = reinterpret_cast<const uint32_t*>(rowPtr);
-            for (int i = 0; i < width; ++i) {
-                uint32_t pixel = pixelsPtr[i];
-                uint8_t dstPixel[4];
-                dstPixel[0] = pixel >> SK_R32_SHIFT;
-                dstPixel[1] = pixel >> SK_G32_SHIFT;
-                dstPixel[2] = pixel >> SK_B32_SHIFT;
-                dstPixel[3] = pixel >> SK_A32_SHIFT;
-                if (!stream->write(dstPixel, 4)) {
-                    return false;
-                }
-            }
-            rowPtr += rowBytes;
-        }
-    } else {
-        for (int i = 0; i < height; ++i) {
-            if (!stream->write(rowPtr, bytesPerPixel * width)) {
-                return false;
-            }
-            rowPtr += rowBytes;
-        }
-    }
-
-    return true;
-}
-
-bool SkKTXFile::WriteBitmapToKTX(SkWStream* stream, const SkBitmap& bitmap) {
-    SkAutoLockPixels autoLockPixels(bitmap);
-    SkPixmap pixmap;
-    return bitmap.peekPixels(&pixmap) && SkKTXFile::WritePixmapToKTX(stream, pixmap);
-}
diff --git a/third_party/ktx/ktx.h b/third_party/ktx/ktx.h
deleted file mode 100644
index 3aaea15726..0000000000
--- a/third_party/ktx/ktx.h
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkKTXFile_DEFINED
-#define SkKTXFile_DEFINED
-
-#include "SkData.h"
-#include "SkTextureCompressor.h"
-#include "SkTypes.h"
-#include "SkTDArray.h"
-#include "SkString.h"
-#include "SkRefCnt.h"
-
-class SkBitmap;
-class SkPixmap;
-class SkStreamRewindable;
-class SkWStream;
-
-// KTX Image File
-// ---
-// KTX is a general texture data storage file format ratified by the Khronos Group. As an
-// overview, a KTX file contains all of the appropriate values needed to fully specify a
-// texture in an OpenGL application, including the use of compressed data.
-//
-// A full format specification can be found here:
-// http://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/
-
-class SkKTXFile {
-public:
-    // The ownership of the data remains with the caller. This class is intended
-    // to be used as a logical wrapper around the data in order to properly
-    // access the pixels.
-    SkKTXFile(SkData* data) : fData(data), fSwapBytes(false) {
-        data->ref();
-        fValid = this->readKTXFile(fData->bytes(), fData->size());
-    }
-
-    bool valid() const { return fValid; }
-
-    int width() const { return static_cast<int>(fHeader.fPixelWidth); }
-    int height() const { return static_cast<int>(fHeader.fPixelHeight); }
-
-    const uint8_t *pixelData(int mipmap = 0) const {
-        SkASSERT(!this->valid() || mipmap < fPixelData.count());
-        return this->valid() ? fPixelData[mipmap].data() : NULL;
-    }
-
-    // If the decoded KTX file has the following key, then it will
-    // return the associated value. If not found, the empty string
-    // is returned.
-    SkString getValueForKey(const SkString& key) const;
-
-    int numMipmaps() const { return static_cast<int>(fHeader.fNumberOfMipmapLevels); }
-
-    bool isCompressedFormat(SkTextureCompressor::Format fmt) const;
-    bool isRGBA8() const;
-    bool isRGB8() const;
-
-    static bool is_ktx(const uint8_t data[], size_t size);
-    static bool is_ktx(SkStreamRewindable* stream);
-
-    static bool WriteETC1ToKTX(SkWStream* stream, const uint8_t *etc1Data,
-                               uint32_t width, uint32_t height);
-    static bool WritePixmapToKTX(SkWStream* stream, const SkPixmap& pixmap);
-    static bool WriteBitmapToKTX(SkWStream* stream, const SkBitmap& bitmap);
-
-private:
-
-    // The blob holding the file data.
-    sk_sp<SkData> fData;
-
-    // This header captures all of the data that describes the format
-    // of the image data in a KTX file.
-    struct Header {
-        uint32_t fGLType;
-        uint32_t fGLTypeSize;
-        uint32_t fGLFormat;
-        uint32_t fGLInternalFormat;
-        uint32_t fGLBaseInternalFormat;
-        uint32_t fPixelWidth;
-        uint32_t fPixelHeight;
-        uint32_t fPixelDepth;
-        uint32_t fNumberOfArrayElements;
-        uint32_t fNumberOfFaces;
-        uint32_t fNumberOfMipmapLevels;
-        uint32_t fBytesOfKeyValueData;
-
-        Header() { memset(this, 0, sizeof(*this)); }
-    } fHeader;
-
-    // A Key Value pair stored in the KTX file. There may be
-    // arbitrarily many of these.
-    class KeyValue {
-    public:
-        KeyValue(size_t size) : fDataSz(size) { }
-        bool readKeyAndValue(const uint8_t *data);
-        size_t size() const { return fDataSz; }
-        const SkString& key() const { return fKey; }
-        const SkString& value() const { return fValue; }
-        bool writeKeyAndValueForKTX(SkWStream* strm);
-    private:
-        const size_t fDataSz;
-        SkString     fKey;
-        SkString     fValue;
-    };
-
-    static KeyValue CreateKeyValue(const char *key, const char *value);
-
-    // The pixel data for a single mipmap level in an image. Based on how
-    // the rest of the data is stored, this may be compressed, a cubemap, etc.
-    // The header will describe the format of this data.
-    class PixelData {
-    public:
-        PixelData(const uint8_t *ptr, size_t sz) : fDataSz(sz), fDataPtr(ptr) { }
-        const uint8_t *data() const { return fDataPtr; }
-        size_t dataSize() const { return fDataSz; }
-    private:
-        const size_t fDataSz;
-        const uint8_t *fDataPtr;
-    };
-
-    // This function is only called once from the constructor. It loads the data
-    // and populates the appropriate fields of this class
-    // (fKeyValuePairs, fPixelData, fSwapBytes)
-    bool readKTXFile(const uint8_t *data, size_t dataLen);
-
-    SkTArray<KeyValue> fKeyValuePairs;
-    SkTDArray<PixelData> fPixelData;
-    bool fValid;
-
-    // If the endianness of the platform is different than the file,
-    // then we need to do proper byte swapping.
-    bool fSwapBytes;
-
-    // Read an integer from a buffer, advance the buffer, and swap
-    // bytes if fSwapBytes is set
-    uint32_t readInt(const uint8_t** buf, size_t* bytesLeft) const;
-};
-
-#endif  // SkKTXFile_DEFINED