'../third_party/ktx/ktx.cpp',
],
'dependencies': [
- 'core.gyp:*'
+ 'core.gyp:*',
+ 'etc1.gyp:libetc1',
],
'direct_dependent_settings': {
'include_dirs': [
'../tests/ImageFilterTest.cpp',
'../tests/InfRectTest.cpp',
'../tests/JpegTest.cpp',
+ '../tests/KtxTest.cpp',
'../tests/LListTest.cpp',
'../tests/LayerDrawLooperTest.cpp',
'../tests/LayerRasterizerTest.cpp',
kPNG_Type,
kWBMP_Type,
kWEBP_Type,
+ kKTX_Type,
};
static SkImageEncoder* Create(Type);
DECLARE_ENCODER_CREATOR(ARGBImageEncoder);
DECLARE_ENCODER_CREATOR(JPEGImageEncoder);
DECLARE_ENCODER_CREATOR(PNGImageEncoder);
+DECLARE_ENCODER_CREATOR(KTXImageEncoder);
DECLARE_ENCODER_CREATOR(WEBPImageEncoder);
// Typedef to make registering encoder callback easier
#include "SkColorPriv.h"
#include "SkImageDecoder.h"
+#include "SkPixelRef.h"
#include "SkScaledBitmapSampler.h"
#include "SkStream.h"
#include "SkStreamHelpers.h"
bm->setConfig(SkBitmap::kARGB_8888_Config,
sampler.scaledWidth(), sampler.scaledHeight(),
0,
- ktxFile.isRGBA8()? kUnpremul_SkAlphaType : kOpaque_SkAlphaType);
+ ktxFile.isRGBA8()? kPremul_SkAlphaType : kOpaque_SkAlphaType);
if (SkImageDecoder::kDecodeBounds_Mode == mode) {
return true;
}
} else if (ktxFile.isRGBA8()) {
+ // If we know that the image contains premultiplied alpha, then
+ // don't premultiply it upon decoding.
+ bool setRequireUnpremul = false;
+ const SkString premulKey("KTXPremultipliedAlpha");
+ if (ktxFile.getValueForKey(premulKey) == SkString("True")) {
+ this->setRequireUnpremultipliedColors(true);
+ setRequireUnpremul = true;
+ }
+
// Uncompressed RGBA data
if (!sampler.begin(bm, SkScaledBitmapSampler::kRGBA, *this)) {
return false;
srcRow += sampler.srcDY() * srcRowBytes;
}
+ // Reset this in case the decoder needs to be used again.
+ if (setRequireUnpremul) {
+ this->setRequireUnpremultipliedColors(false);
+ }
+
return true;
}
return false;
}
+///////////////////////////////////////////////////////////////////////////////
+
+// KTX Image Encoder
+//
+// This encoder takes a best guess at how to encode the bitmap passed to it. If
+// there is an installed discardable pixel ref with existing PKM data, then we
+// will repurpose the existing ETC1 data into a KTX file. If the data contains
+// KTX data, then we simply return a copy of the same data. For all other files,
+// the underlying KTX library tries to do its best to encode the appropriate
+// data specified by the bitmap based on the config. (i.e. kAlpha8_Config will
+// be represented as a full resolution 8-bit image dump with the appropriate
+// OpenGL defines in the header).
+
+class SkKTXImageEncoder : public SkImageEncoder {
+protected:
+ virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) SK_OVERRIDE;
+
+private:
+ virtual bool encodePKM(SkWStream* stream, const SkData *data);
+ typedef SkImageEncoder INHERITED;
+};
+
+bool SkKTXImageEncoder::onEncode(SkWStream* stream, const SkBitmap& bitmap, int) {
+ SkAutoDataUnref data(bitmap.pixelRef()->refEncodedData());
+
+ // Is this even encoded data?
+ if (NULL != data) {
+ const uint8_t *bytes = data->bytes();
+ if (etc1_pkm_is_valid(bytes)) {
+ return this->encodePKM(stream, data);
+ }
+
+ // Is it a KTX file??
+ if (SkKTXFile::is_ktx(bytes)) {
+ return stream->write(bytes, data->size());
+ }
+
+ // If it's neither a KTX nor a PKM, then we need to
+ // get at the actual pixels, so fall through and decompress...
+ }
+
+ return SkKTXFile::WriteBitmapToKTX(stream, bitmap);
+}
+
+bool SkKTXImageEncoder::encodePKM(SkWStream* stream, const SkData *data) {
+ const uint8_t* bytes = data->bytes();
+ SkASSERT(etc1_pkm_is_valid(bytes));
+
+ etc1_uint32 width = etc1_pkm_get_width(bytes);
+ etc1_uint32 height = etc1_pkm_get_height(bytes);
+
+ // ETC1 Data is stored as compressed 4x4 pixel blocks, so we must make sure
+ // that our dimensions are valid.
+ if (width == 0 || (width & 3) != 0 || height == 0 || (height & 3) != 0) {
+ return false;
+ }
+
+ // Advance pointer to etc1 data.
+ bytes += ETC_PKM_HEADER_SIZE;
+
+ return SkKTXFile::WriteETC1ToKTX(stream, bytes, width, height);
+}
+
/////////////////////////////////////////////////////////////////////////////////////////
DEFINE_DECODER_CREATOR(KTXImageDecoder);
+DEFINE_ENCODER_CREATOR(KTXImageEncoder);
/////////////////////////////////////////////////////////////////////////////////////////
static SkImageDecoder* sk_libktx_dfactory(SkStreamRewindable* stream) {
return NULL;
}
-static SkImageDecoder_DecodeReg gReg(sk_libktx_dfactory);
-
static SkImageDecoder::Format get_format_ktx(SkStreamRewindable* stream) {
if (SkKTXFile::is_ktx(stream)) {
return SkImageDecoder::kKTX_Format;
return SkImageDecoder::kUnknown_Format;
}
+SkImageEncoder* sk_libktx_efactory(SkImageEncoder::Type t) {
+ return (SkImageEncoder::kKTX_Type == t) ? SkNEW(SkKTXImageEncoder) : NULL;
+}
+
+static SkImageDecoder_DecodeReg gReg(sk_libktx_dfactory);
static SkImageDecoder_FormatReg gFormatReg(get_format_ktx);
+static SkImageEncoder_EncodeReg gEReg(sk_libktx_efactory);
--- /dev/null
+/*
+ * 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 "SkBitmap.h"
+#include "SkData.h"
+#include "SkDecodingImageGenerator.h"
+#include "SkForceLinking.h"
+#include "SkImageDecoder.h"
+#include "SkOSFile.h"
+#include "SkRandom.h"
+#include "SkStream.h"
+#include "Test.h"
+
+__SK_FORCE_IMAGE_DECODER_LINKING;
+
+/**
+ * First, make sure that writing an 8-bit RGBA KTX file and then
+ * reading it produces the same bitmap.
+ */
+DEF_TEST(KtxReadWrite, reporter) {
+
+ // Random number generator with explicit seed for reproducibility
+ SkRandom rand(0x1005cbad);
+
+ SkBitmap bm8888;
+ bm8888.setConfig(SkBitmap::kARGB_8888_Config, 128, 128);
+
+ bool pixelsAllocated = bm8888.allocPixels();
+ REPORTER_ASSERT(reporter, pixelsAllocated);
+
+ uint8_t *pixels = reinterpret_cast<uint8_t*>(bm8888.getPixels());
+ REPORTER_ASSERT(reporter, NULL != pixels);
+
+ if (NULL == pixels) {
+ return;
+ }
+
+ uint8_t *row = pixels;
+ for (int y = 0; y < bm8888.height(); ++y) {
+ for (int x = 0; x < bm8888.width(); ++x) {
+ uint8_t a = rand.nextRangeU(0, 255);
+ uint8_t r = rand.nextRangeU(0, 255);
+ uint8_t g = rand.nextRangeU(0, 255);
+ uint8_t b = rand.nextRangeU(0, 255);
+
+ SkPMColor &pixel = *(reinterpret_cast<SkPMColor*>(row + x*sizeof(SkPMColor)));
+ pixel = SkPreMultiplyARGB(a, r, g, b);
+ }
+ row += bm8888.rowBytes();
+ }
+ REPORTER_ASSERT(reporter, !(bm8888.empty()));
+
+ SkAutoDataUnref encodedData(SkImageEncoder::EncodeData(bm8888, SkImageEncoder::kKTX_Type, 0));
+ REPORTER_ASSERT(reporter, NULL != encodedData);
+
+ SkAutoTUnref<SkMemoryStream> stream(SkNEW_ARGS(SkMemoryStream, (encodedData)));
+ REPORTER_ASSERT(reporter, NULL != stream);
+
+ SkBitmap decodedBitmap;
+ bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
+ REPORTER_ASSERT(reporter, imageDecodeSuccess);
+
+ REPORTER_ASSERT(reporter, decodedBitmap.config() == bm8888.config());
+ REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == bm8888.alphaType());
+ REPORTER_ASSERT(reporter, decodedBitmap.width() == bm8888.width());
+ REPORTER_ASSERT(reporter, decodedBitmap.height() == bm8888.height());
+ REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
+
+ uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
+ REPORTER_ASSERT(reporter, NULL != decodedPixels);
+ REPORTER_ASSERT(reporter, decodedBitmap.getSize() == bm8888.getSize());
+
+ if (NULL == decodedPixels) {
+ return;
+ }
+
+ REPORTER_ASSERT(reporter, memcmp(decodedPixels, pixels, decodedBitmap.getSize()) == 0);
+}
+
+/**
+ * Next test is to see whether or not reading an unpremultiplied KTX file accurately
+ * creates a premultiplied buffer...
+ */
+DEF_TEST(KtxReadUnpremul, reporter) {
+
+ static const uint8_t kHalfWhiteKTX[] = {
+ 0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, // First twelve bytes is magic
+ 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A, // KTX identifier string
+ 0x01, 0x02, 0x03, 0x04, // Then magic endian specifier
+ 0x01, 0x14, 0x00, 0x00, // uint32_t fGLType;
+ 0x01, 0x00, 0x00, 0x00, // uint32_t fGLTypeSize;
+ 0x08, 0x19, 0x00, 0x00, // uint32_t fGLFormat;
+ 0x58, 0x80, 0x00, 0x00, // uint32_t fGLInternalFormat;
+ 0x08, 0x19, 0x00, 0x00, // uint32_t fGLBaseInternalFormat;
+ 0x02, 0x00, 0x00, 0x00, // uint32_t fPixelWidth;
+ 0x02, 0x00, 0x00, 0x00, // uint32_t fPixelHeight;
+ 0x00, 0x00, 0x00, 0x00, // uint32_t fPixelDepth;
+ 0x00, 0x00, 0x00, 0x00, // uint32_t fNumberOfArrayElements;
+ 0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfFaces;
+ 0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfMipmapLevels;
+ 0x00, 0x00, 0x00, 0x00, // uint32_t fBytesOfKeyValueData;
+ 0x10, 0x00, 0x00, 0x00, // image size: 2x2 image of RGBA = 4 * 4 = 16 bytes
+ 0xFF, 0xFF, 0xFF, 0x80, // Pixel 1
+ 0xFF, 0xFF, 0xFF, 0x80, // Pixel 2
+ 0xFF, 0xFF, 0xFF, 0x80, // Pixel 3
+ 0xFF, 0xFF, 0xFF, 0x80};// Pixel 4
+
+ SkAutoTUnref<SkMemoryStream> stream(
+ SkNEW_ARGS(SkMemoryStream, (kHalfWhiteKTX, sizeof(kHalfWhiteKTX))));
+ REPORTER_ASSERT(reporter, NULL != stream);
+
+ SkBitmap decodedBitmap;
+ bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
+ REPORTER_ASSERT(reporter, imageDecodeSuccess);
+
+ REPORTER_ASSERT(reporter, decodedBitmap.config() == SkBitmap::kARGB_8888_Config);
+ REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == kPremul_SkAlphaType);
+ REPORTER_ASSERT(reporter, decodedBitmap.width() == 2);
+ REPORTER_ASSERT(reporter, decodedBitmap.height() == 2);
+ REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
+
+ uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
+ REPORTER_ASSERT(reporter, NULL != decodedPixels);
+
+ uint8_t *row = decodedPixels;
+ for (int j = 0; j < decodedBitmap.height(); ++j) {
+ for (int i = 0; i < decodedBitmap.width(); ++i) {
+ SkPMColor pixel = *(reinterpret_cast<SkPMColor*>(row + i*sizeof(SkPMColor)));
+ REPORTER_ASSERT(reporter, SkPreMultiplyARGB(0x80, 0xFF, 0xFF, 0xFF) == pixel);
+ }
+ row += decodedBitmap.rowBytes();
+ }
+}
+
+/**
+ * Finally, make sure that if we get ETC1 data from a PKM file that we can then
+ * accurately write it out into a KTX file (i.e. transferring the ETC1 data from
+ * the PKM to the KTX should produce an identical KTX to the one we have on file)
+ */
+DEF_TEST(KtxReexportPKM, reporter) {
+ SkString resourcePath = skiatest::Test::GetResourcePath();
+ SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(), "mandrill_128.pkm");
+
+ // Load PKM file into a bitmap
+ SkBitmap etcBitmap;
+ SkAutoTUnref<SkData> fileData(SkData::NewFromFileName(filename.c_str()));
+ REPORTER_ASSERT(reporter, NULL != fileData);
+
+ bool installDiscardablePixelRefSuccess =
+ SkInstallDiscardablePixelRef(
+ SkDecodingImageGenerator::Create(
+ fileData, SkDecodingImageGenerator::Options()), &etcBitmap);
+ REPORTER_ASSERT(reporter, installDiscardablePixelRefSuccess);
+
+ // Write the bitmap out to a KTX file.
+ SkData *ktxDataPtr = SkImageEncoder::EncodeData(etcBitmap, SkImageEncoder::kKTX_Type, 0);
+ SkAutoDataUnref newKtxData(ktxDataPtr);
+ REPORTER_ASSERT(reporter, NULL != ktxDataPtr);
+
+ // See is this data is identical to data in existing ktx file.
+ SkString ktxFilename = SkOSPath::SkPathJoin(resourcePath.c_str(), "mandrill_128.ktx");
+ SkAutoDataUnref oldKtxData(SkData::NewFromFileName(ktxFilename.c_str()));
+ REPORTER_ASSERT(reporter, oldKtxData->equals(newKtxData));
+}
*/
#include "ktx.h"
+#include "SkBitmap.h"
#include "SkStream.h"
#include "SkEndian.h"
#include "gl/GrGLDefines.h"
+#include "etc1.h"
+
#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
++value;
size_t bytesLeft = this->fDataSz - bytesRead;
- this->fKey.set(key, 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);
+ 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(NULL != buf && NULL != bytesLeft);
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::isETC1() const {
return this->valid() && GR_GL_COMPRESSED_RGB8_ETC1 == fHeader.fGLInternalFormat;
}
}
return is_ktx(buf);
}
+
+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_RGB8_ETC1;
+ 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 bitmap'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::WriteBitmapToKTX(SkWStream* stream, const SkBitmap& bitmap) {
+ const SkBitmap::Config config = bitmap.config();
+ SkAutoLockPixels alp(bitmap);
+
+ const int width = bitmap.width();
+ const int height = bitmap.width();
+ const uint8_t* src = reinterpret_cast<uint8_t*>(bitmap.getPixels());
+ if (NULL == bitmap.getPixels()) {
+ return false;
+ }
+
+ // 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 bitmap's config.
+ Header hdr;
+ switch (config) {
+ case SkBitmap::kIndex8_Config:
+ // There is a compressed format for this, but we don't support it yet.
+ SkDebugf("Writing indexed bitmap to KTX unsupported.\n");
+ // VVV fall through VVV
+ default:
+ case SkBitmap::kNo_Config:
+ // Bitmap hasn't been configured.
+ return false;
+
+ case SkBitmap::kA8_Config:
+ 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 SkBitmap::kRGB_565_Config:
+ 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 SkBitmap::kARGB_4444_Config:
+ 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 SkBitmap::kARGB_8888_Config:
+ 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 += 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
+ int bpp = bitmap.bytesPerPixel();
+ uint32_t dataSz = bpp * width * height;
+
+ if (0 >= bpp) {
+ return false;
+ }
+
+ // Write it into the buffer
+ if (!stream->write(&dataSz, 4)) {
+ return false;
+ }
+
+ // Write the pixel data...
+ const uint8_t* rowPtr = src;
+ if (SkBitmap::kARGB_8888_Config == config) {
+ 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 += bitmap.rowBytes();
+ }
+ } else {
+ for (int i = 0; i < height; ++i) {
+ if (!stream->write(rowPtr, bpp*width)) {
+ return false;
+ }
+ rowPtr += bitmap.rowBytes();
+ }
+ }
+
+ return true;
+}
#include "SkString.h"
#include "SkRefCnt.h"
+class SkBitmap;
class SkStreamRewindable;
+class SkWStream;
// KTX Image File
// ---
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 isETC1() const;
static bool is_ktx(const uint8_t *data);
static bool is_ktx(SkStreamRewindable* stream);
+ static bool WriteETC1ToKTX(SkWStream* stream, const uint8_t *etc1Data,
+ uint32_t width, uint32_t height);
+ static bool WriteBitmapToKTX(SkWStream* stream, const SkBitmap& bitmap);
private:
// The blob holding the file data.
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;
+ 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.
projects / platform / upstream / libSkiaSharp.git / commitdiff