2 * Copyright (c) 2022 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/internal/imaging/common/loader-jpeg.h>
23 #include <libexif/exif-data.h>
24 #include <libexif/exif-loader.h>
25 #include <libexif/exif-tag.h>
27 #include <turbojpeg.h>
34 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
35 #include <dali/public-api/object/property-array.h>
36 #include <dali/public-api/object/property-map.h>
39 #include <dali/devel-api/adaptor-framework/image-loading.h>
40 #include <dali/internal/imaging/common/image-operations.h>
41 #include <dali/internal/imaging/common/pixel-buffer-impl.h>
42 #include <dali/internal/legacy/tizen/platform-capabilities.h>
47 namespace Pixel = Dali::Pixel;
48 using PixelArray = unsigned char*;
49 const unsigned int DECODED_L8 = 1;
50 const unsigned int DECODED_RGB888 = 3;
51 const unsigned int DECODED_RGBA8888 = 4;
53 /** Transformations that can be applied to decoded pixels to respect exif orientation
54 * codes in image headers */
55 enum class JpegTransform
57 NONE, //< no transformation 0th-Row = top & 0th-Column = left
58 FLIP_HORIZONTAL, //< horizontal flip 0th-Row = top & 0th-Column = right
59 ROTATE_180, //< 180-degree rotation 0th-Row = bottom & 0th-Column = right
60 FLIP_VERTICAL, //< vertical flip 0th-Row = bottom & 0th-Column = left
61 TRANSPOSE, //< transpose across UL-to-LR axis 0th-Row = left & 0th-Column = top
62 ROTATE_90, //< 90-degree clockwise rotation 0th-Row = right & 0th-Column = top
63 TRANSVERSE, //< transpose across UR-to-LL axis 0th-Row = right & 0th-Column = bottom
64 ROTATE_270, //< 270-degree clockwise (or 90 ccw) 0th-Row = left & 0th-Column = bottom
68 * @brief Error handling bookeeping for the JPEG Turbo library's
69 * setjmp/longjmp simulated exceptions.
73 struct jpeg_error_mgr errorManager;
78 * @brief Called by the JPEG library when it hits an error.
79 * We jump out of the library so our loader code can return an error.
81 void JpegErrorHandler(j_common_ptr cinfo)
83 DALI_LOG_ERROR("JpegErrorHandler(): libjpeg-turbo fatal error in JPEG decoding.\n");
84 /* cinfo->err really points to a JpegErrorState struct, so coerce pointer */
85 JpegErrorState* myerr = reinterpret_cast<JpegErrorState*>(cinfo->err);
87 /* Return control to the setjmp point */
88 longjmp(myerr->jumpBuffer, 1);
91 void JpegOutputMessageHandler(j_common_ptr cinfo)
93 /* Stop libjpeg from printing to stderr - Do Nothing */
97 * LibJPEG Turbo tjDecompress2 API doesn't distinguish between errors that still allow
98 * the JPEG to be displayed and fatal errors.
100 bool IsJpegErrorFatal(const std::string& errorMessage)
102 if((errorMessage.find("Corrupt JPEG data") != std::string::npos) ||
103 (errorMessage.find("Invalid SOS parameters") != std::string::npos) ||
104 (errorMessage.find("Invalid JPEG file structure") != std::string::npos) ||
105 (errorMessage.find("Unsupported JPEG process") != std::string::npos) ||
106 (errorMessage.find("Unsupported marker type") != std::string::npos) ||
107 (errorMessage.find("Bogus marker length") != std::string::npos) ||
108 (errorMessage.find("Bogus DQT index") != std::string::npos) ||
109 (errorMessage.find("Bogus Huffman table definition") != std::string::npos))
116 bool IsJpegDecodingFailed()
118 std::string errorString = tjGetErrorStr();
120 if(DALI_UNLIKELY(IsJpegErrorFatal(errorString)))
122 DALI_LOG_ERROR("%s\n", errorString.c_str());
127 DALI_LOG_WARNING("%s\n", errorString.c_str());
132 // helpers for safe exif memory handling
133 using ExifHandle = std::unique_ptr<ExifData, decltype(exif_data_free)*>;
135 ExifHandle MakeNullExifData()
137 return ExifHandle{nullptr, exif_data_free};
140 ExifHandle MakeExifDataFromData(unsigned char* data, unsigned int size)
142 return ExifHandle{exif_data_new_from_data(data, size), exif_data_free};
145 // Helpers for safe Jpeg memory handling
146 using JpegHandle = std::unique_ptr<void /*tjhandle*/, decltype(tjDestroy)*>;
148 JpegHandle MakeJpegCompressor()
150 return JpegHandle{tjInitCompress(), tjDestroy};
153 JpegHandle MakeJpegDecompressor()
155 return JpegHandle{tjInitDecompress(), tjDestroy};
158 using JpegMemoryHandle = std::unique_ptr<unsigned char, decltype(tjFree)*>;
160 JpegMemoryHandle MakeJpegMemory()
162 return JpegMemoryHandle{nullptr, tjFree};
165 template<class T, class Deleter>
166 class UniquePointerSetter final
169 UniquePointerSetter(std::unique_ptr<T, Deleter>& uniquePointer)
170 : mUniquePointer(uniquePointer),
175 /// @brief Pointer to Pointer cast operator
181 /// @brief Destructor, reset the unique_ptr
182 ~UniquePointerSetter()
184 mUniquePointer.reset(mRawPointer);
188 std::unique_ptr<T, Deleter>& mUniquePointer;
192 template<typename T, typename Deleter>
193 UniquePointerSetter<T, Deleter> SetPointer(std::unique_ptr<T, Deleter>& uniquePointer)
195 return UniquePointerSetter<T, Deleter>{uniquePointer};
198 using TransformFunction = std::function<void(PixelArray, unsigned, unsigned)>;
199 using TransformFunctionArray = std::array<TransformFunction, 3>; // 1, 3 and 4 bytes per pixel
201 /// @brief Select the transform function depending on the pixel format
202 TransformFunction GetTransformFunction(const TransformFunctionArray& functions,
203 Pixel::Format pixelFormat)
205 auto function = TransformFunction{};
207 int decodedPixelSize = Pixel::GetBytesPerPixel(pixelFormat);
208 switch(decodedPixelSize)
212 function = functions[0];
217 function = functions[1];
220 case DECODED_RGBA8888:
222 function = functions[2];
227 DALI_LOG_ERROR("Transform operation not supported on this Pixel::Format!");
228 function = functions[1];
235 // Storing Exif fields as properties
236 template<class R, class V>
237 R ConvertExifNumeric(const ExifEntry& entry)
239 return static_cast<R>((*reinterpret_cast<V*>(entry.data)));
242 void AddExifFieldPropertyMap(Dali::Property::Map& out, const ExifEntry& entry, ExifIfd ifd)
244 auto shortName = std::string(exif_tag_get_name_in_ifd(entry.tag, ifd));
247 case EXIF_FORMAT_ASCII:
249 out.Insert(shortName, std::string(reinterpret_cast<char*>(entry.data), entry.size));
252 case EXIF_FORMAT_SHORT:
254 out.Insert(shortName, ConvertExifNumeric<int, uint16_t>(entry));
257 case EXIF_FORMAT_LONG:
259 out.Insert(shortName, ConvertExifNumeric<int, uint32_t>(entry));
262 case EXIF_FORMAT_SSHORT:
264 out.Insert(shortName, ConvertExifNumeric<int, int16_t>(entry));
267 case EXIF_FORMAT_SLONG:
269 out.Insert(shortName, ConvertExifNumeric<int, int32_t>(entry));
272 case EXIF_FORMAT_FLOAT:
274 out.Insert(shortName, ConvertExifNumeric<float, float>(entry));
277 case EXIF_FORMAT_DOUBLE:
279 out.Insert(shortName, ConvertExifNumeric<float, double>(entry));
282 case EXIF_FORMAT_RATIONAL:
284 auto values = reinterpret_cast<unsigned int*>(entry.data);
285 Dali::Property::Array array;
286 array.Add(static_cast<int>(values[0]));
287 array.Add(static_cast<int>(values[1]));
288 out.Insert(shortName, array);
291 case EXIF_FORMAT_SBYTE:
293 out.Insert(shortName, "EXIF_FORMAT_SBYTE Unsupported");
296 case EXIF_FORMAT_BYTE:
298 out.Insert(shortName, "EXIF_FORMAT_BYTE Unsupported");
301 case EXIF_FORMAT_SRATIONAL:
303 auto values = reinterpret_cast<int*>(entry.data);
304 Dali::Property::Array array;
305 array.Add(values[0]);
306 array.Add(values[1]);
307 out.Insert(shortName, array);
310 case EXIF_FORMAT_UNDEFINED:
313 std::stringstream ss;
314 ss << "EXIF_FORMAT_UNDEFINED, size: " << entry.size << ", components: " << entry.components;
315 out.Insert(shortName, ss.str());
320 /// @brief Apply a transform to a buffer
321 bool Transform(const TransformFunctionArray& transformFunctions,
325 Pixel::Format pixelFormat)
327 auto transformFunction = GetTransformFunction(transformFunctions, pixelFormat);
328 if(transformFunction)
330 transformFunction(buffer, width, height);
332 return bool(transformFunction);
335 /// @brief Auxiliar type to represent pixel data with different number of bytes
343 void Rotate180(PixelArray buffer, int width, int height)
345 // Destination pixel, set as the first pixel of screen
346 auto to = reinterpret_cast<PixelType<N>*>(buffer);
348 // Source pixel, as the image is flipped horizontally and vertically,
349 // the source pixel is the end of the buffer of size width * height
350 auto from = reinterpret_cast<PixelType<N>*>(buffer) + width * height - 1;
352 for(auto ix = 0, endLoop = (width * height) / 2; ix < endLoop; ++ix, ++to, --from)
354 std::swap(*from, *to);
359 void FlipHorizontal(PixelArray buffer, int width, int height)
361 for(auto iy = 0; iy < height; ++iy)
363 //Set the destination pixel as the beginning of the row
364 auto to = reinterpret_cast<PixelType<N>*>(buffer) + width * iy;
365 //Set the source pixel as the end of the row to flip in X axis
366 auto from = reinterpret_cast<PixelType<N>*>(buffer) + width * (iy + 1) - 1;
367 for(auto ix = 0; ix < width / 2; ++ix, ++to, --from)
369 std::swap(*from, *to);
375 void FlipVertical(PixelArray buffer, int width, int height)
377 //Transform vertically only
378 for(auto iy = 0; iy < height / 2; ++iy)
380 for(auto ix = 0; ix < width; ++ix)
382 auto to = reinterpret_cast<PixelType<N>*>(buffer) + iy * width + ix;
383 auto from = reinterpret_cast<PixelType<N>*>(buffer) + (height - 1 - iy) * width + ix;
384 std::swap(*from, *to);
390 void Transpose(PixelArray buffer, int width, int height)
392 using PixelT = PixelType<N>;
394 data.ResizeUninitialized(width * height);
395 auto dataPtr = data.Begin();
397 auto original = reinterpret_cast<PixelT*>(buffer);
398 std::copy(original, original + width * height, dataPtr);
401 for(auto iy = 0; iy < width; ++iy)
403 for(auto ix = 0; ix < height; ++ix, ++to)
405 auto from = dataPtr + ix * width + iy;
412 void Rotate90(PixelArray buffer, int width, int height)
414 using PixelT = PixelType<N>;
416 data.ResizeUninitialized(width * height);
417 auto dataPtr = data.Begin();
419 auto original = reinterpret_cast<PixelT*>(buffer);
420 std::copy(original, original + width * height, dataPtr);
422 std::swap(width, height);
423 auto hw = width * height;
426 auto to = original + width - 1;
429 for(auto ix = width; --ix >= 0;)
431 for(auto iy = height; --iy >= 0; ++from)
441 void Transverse(PixelArray buffer, int width, int height)
443 using PixelT = PixelType<N>;
445 data.ResizeUninitialized(width * height);
446 auto dataPtr = data.Begin();
448 auto original = reinterpret_cast<PixelT*>(buffer);
449 std::copy(original, original + width * height, dataPtr);
452 for(auto iy = 0; iy < width; iy++)
454 for(auto ix = 0; ix < height; ix++)
456 auto from = dataPtr + (height - ix) * width - 1 - iy;
464 void Rotate270(PixelArray buffer, int width, int height)
466 using PixelT = PixelType<N>;
468 data.ResizeUninitialized(width * height);
469 auto dataPtr = data.Begin();
471 auto original = reinterpret_cast<PixelT*>(buffer);
472 std::copy(original, original + width * height, dataPtr);
475 std::swap(width, height);
476 auto hw = width * height;
478 auto* to = original + hw - width;
479 auto* from = dataPtr;
483 for(auto ix = width; --ix >= 0;)
485 for(auto iy = height; --iy >= 0;)
495 void GetJpegPixelFormat(int jpegColorspace, TJPF& pixelLibJpegType, Pixel::Format& pixelFormat)
497 pixelLibJpegType = TJPF_RGB;
498 pixelFormat = Pixel::RGB888;
500 switch(jpegColorspace)
503 // YCbCr is not an absolute colorspace but rather a mathematical transformation of RGB designed solely for storage and transmission.
504 // YCbCr images must be converted to RGB before they can actually be displayed.
507 pixelLibJpegType = TJPF_RGB;
508 pixelFormat = Pixel::RGB888;
513 pixelLibJpegType = TJPF_GRAY;
514 pixelFormat = Pixel::L8;
520 pixelLibJpegType = TJPF_CMYK;
521 pixelFormat = Pixel::RGBA8888;
526 pixelLibJpegType = TJPF_RGB;
527 pixelFormat = Pixel::RGB888;
533 bool TransformBitmap(int scaledPreXformWidth, int scaledPreXformHeight, JpegTransform transform, uint8_t* bitmapPixelBuffer, Pixel::Format pixelFormat)
535 const unsigned int bufferWidth = Dali::TizenPlatform::GetTextureDimension(scaledPreXformWidth);
536 const unsigned int bufferHeight = Dali::TizenPlatform::GetTextureDimension(scaledPreXformHeight);
542 case JpegTransform::NONE:
547 // 3 orientation changes for a camera held perpendicular to the ground or upside-down:
548 case JpegTransform::ROTATE_180:
550 static auto rotate180Functions = TransformFunctionArray{
555 result = Transform(rotate180Functions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
558 case JpegTransform::ROTATE_270:
560 static auto rotate270Functions = TransformFunctionArray{
565 result = Transform(rotate270Functions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
568 case JpegTransform::ROTATE_90:
570 static auto rotate90Functions = TransformFunctionArray{
575 result = Transform(rotate90Functions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
578 case JpegTransform::FLIP_VERTICAL:
580 static auto flipVerticalFunctions = TransformFunctionArray{
585 result = Transform(flipVerticalFunctions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
588 // Less-common orientation changes, since they don't correspond to a camera's physical orientation:
589 case JpegTransform::FLIP_HORIZONTAL:
591 static auto flipHorizontalFunctions = TransformFunctionArray{
596 result = Transform(flipHorizontalFunctions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
599 case JpegTransform::TRANSPOSE:
601 static auto transposeFunctions = TransformFunctionArray{
606 result = Transform(transposeFunctions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
609 case JpegTransform::TRANSVERSE:
611 static auto transverseFunctions = TransformFunctionArray{
616 result = Transform(transverseFunctions, bitmapPixelBuffer, bufferWidth, bufferHeight, pixelFormat);
621 DALI_LOG_ERROR("Unsupported JPEG Orientation transformation: %x.\n", transform);
628 bool LoadJpegFile(const Dali::ImageLoader::Input& input, Vector<uint8_t>& jpegBuffer, unsigned int& jpegBufferSize)
630 FILE* const fp = input.file;
632 if(DALI_UNLIKELY(fseek(fp, 0, SEEK_END)))
634 DALI_LOG_ERROR("Error seeking to end of file\n");
638 long positionIndicator = ftell(fp);
640 if(positionIndicator > -1L)
642 jpegBufferSize = static_cast<unsigned int>(positionIndicator);
645 if(DALI_UNLIKELY(0u == jpegBufferSize))
647 DALI_LOG_ERROR("Jpeg buffer size error\n");
651 if(DALI_UNLIKELY(fseek(fp, 0, SEEK_SET)))
653 DALI_LOG_ERROR("Error seeking to start of file\n");
659 jpegBuffer.ResizeUninitialized(jpegBufferSize);
663 DALI_LOG_ERROR("Could not allocate temporary memory to hold JPEG file of size %uMB.\n", jpegBufferSize / 1048576U);
666 unsigned char* const jpegBufferPtr = jpegBuffer.Begin();
668 // Pull the compressed JPEG image bytes out of a file and into memory:
669 if(DALI_UNLIKELY(fread(jpegBufferPtr, 1, jpegBufferSize, fp) != jpegBufferSize))
671 DALI_LOG_ERROR("Error on image file read.\n");
675 if(DALI_UNLIKELY(fseek(fp, 0, SEEK_SET)))
677 DALI_LOG_ERROR("Error seeking to start of file\n");
688 namespace TizenPlatform
690 bool DecodeJpeg(const Dali::ImageLoader::Input& input, std::vector<Dali::Devel::PixelBuffer>& pixelBuffers, bool decodeToYuv);
691 JpegTransform ConvertExifOrientation(ExifData* exifData);
692 bool TransformSize(int requiredWidth, int requiredHeight, FittingMode::Type fittingMode, SamplingMode::Type samplingMode, JpegTransform transform, int& preXformImageWidth, int& preXformImageHeight, int& postXformImageWidth, int& postXformImageHeight);
694 bool LoadJpegHeader(FILE* fp, unsigned int& width, unsigned int& height)
696 // using libjpeg API to avoid having to read the whole file in a buffer
697 struct jpeg_decompress_struct cinfo;
698 struct JpegErrorState jerr;
699 cinfo.err = jpeg_std_error(&jerr.errorManager);
701 jerr.errorManager.output_message = JpegOutputMessageHandler;
702 jerr.errorManager.error_exit = JpegErrorHandler;
704 // On error exit from the JPEG lib, control will pass via JpegErrorHandler
705 // into this branch body for cleanup and error return:
706 if(DALI_UNLIKELY(setjmp(jerr.jumpBuffer)))
708 DALI_LOG_ERROR("setjmp failed\n");
709 jpeg_destroy_decompress(&cinfo);
713 // jpeg_create_decompress internally uses C casts
714 #pragma GCC diagnostic push
715 #pragma GCC diagnostic ignored "-Wold-style-cast"
716 jpeg_create_decompress(&cinfo);
717 #pragma GCC diagnostic pop
719 jpeg_stdio_src(&cinfo, fp);
721 // Check header to see if it is JPEG file
722 if(DALI_UNLIKELY(jpeg_read_header(&cinfo, TRUE) != JPEG_HEADER_OK))
724 DALI_LOG_ERROR("jpeg_read_header failed\n");
726 jpeg_destroy_decompress(&cinfo);
730 width = cinfo.image_width;
731 height = cinfo.image_height;
733 jpeg_destroy_decompress(&cinfo);
737 bool LoadBitmapFromJpeg(const Dali::ImageLoader::Input& input, Dali::Devel::PixelBuffer& bitmap)
739 std::vector<Dali::Devel::PixelBuffer> pixelBuffers;
741 bool result = DecodeJpeg(input, pixelBuffers, false);
742 if(!result && pixelBuffers.empty())
748 bitmap = pixelBuffers[0];
753 bool LoadPlanesFromJpeg(const Dali::ImageLoader::Input& input, std::vector<Dali::Devel::PixelBuffer>& pixelBuffers)
755 return DecodeJpeg(input, pixelBuffers, true);
758 bool DecodeJpeg(const Dali::ImageLoader::Input& input, std::vector<Dali::Devel::PixelBuffer>& pixelBuffers, bool decodeToYuv)
760 Vector<uint8_t> jpegBuffer;
761 unsigned int jpegBufferSize = 0u;
763 if(!LoadJpegFile(input, jpegBuffer, jpegBufferSize))
765 DALI_LOG_ERROR("LoadJpegFile failed\n");
769 auto jpeg = MakeJpegDecompressor();
770 if(DALI_UNLIKELY(!jpeg))
772 DALI_LOG_ERROR("%s\n", tjGetErrorStr());
776 uint8_t* const jpegBufferPtr = jpegBuffer.Begin();
777 auto transform = JpegTransform::NONE;
780 auto exifData = MakeExifDataFromData(jpegBufferPtr, jpegBufferSize);
782 if(exifData && input.reorientationRequested)
784 transform = ConvertExifOrientation(exifData.get());
787 // Push jpeg data in memory buffer through TurboJPEG decoder to make a raw pixel array:
788 int chrominanceSubsampling = -1;
789 int preXformImageWidth = 0, preXformImageHeight = 0;
790 int jpegColorspace = -1;
792 if(tjDecompressHeader3(jpeg.get(), jpegBufferPtr, jpegBufferSize, &preXformImageWidth, &preXformImageHeight, &chrominanceSubsampling, &jpegColorspace) == -1)
794 DALI_LOG_ERROR("%s\n", tjGetErrorStr());
795 // Do not set width and height to 0 or return early as this sometimes fails only on determining subsampling type.
798 if(DALI_UNLIKELY(preXformImageWidth == 0 || preXformImageHeight == 0))
800 DALI_LOG_ERROR("Invalid Image!\n");
804 int requiredWidth = input.scalingParameters.dimensions.GetWidth();
805 int requiredHeight = input.scalingParameters.dimensions.GetHeight();
807 // If transform is a 90 or 270 degree rotation, the logical width and height
808 // request from the client needs to be adjusted to account by effectively
809 // rotating that too, and the final width and height need to be swapped:
810 int postXformImageWidth = preXformImageWidth;
811 int postXformImageHeight = preXformImageHeight;
813 int scaledPreXformWidth = preXformImageWidth;
814 int scaledPreXformHeight = preXformImageHeight;
815 int scaledPostXformWidth = postXformImageWidth;
816 int scaledPostXformHeight = postXformImageHeight;
818 TransformSize(requiredWidth, requiredHeight, input.scalingParameters.scalingMode, input.scalingParameters.samplingMode, transform, scaledPreXformWidth, scaledPreXformHeight, scaledPostXformWidth, scaledPostXformHeight);
822 // Now we support YUV420 only
823 if(decodeToYuv && chrominanceSubsampling == TJSAMP_420 && transform == JpegTransform::NONE)
825 unsigned char* planes[3];
827 // Allocate buffers for each plane and decompress the jpeg buffer into the buffers
828 for(int i = 0; i < 3; i++)
830 auto planeSize = tjPlaneSizeYUV(i, scaledPostXformWidth, 0, scaledPostXformHeight, chrominanceSubsampling);
832 unsigned char* buffer = static_cast<unsigned char*>(malloc(planeSize));
835 DALI_LOG_ERROR("Buffer allocation is failed [%d]\n", planeSize);
836 pixelBuffers.clear();
840 int width, height, planeWidth;
841 Pixel::Format pixelFormat = Pixel::RGB888;
846 width = scaledPostXformWidth;
847 height = scaledPostXformHeight;
848 planeWidth = tjPlaneWidth(i, scaledPostXformWidth, chrominanceSubsampling);
849 pixelFormat = Pixel::L8;
854 width = tjPlaneWidth(i, scaledPostXformWidth, chrominanceSubsampling);
855 height = tjPlaneHeight(i, scaledPostXformHeight, chrominanceSubsampling);
857 pixelFormat = (i == 1 ? Pixel::CHROMINANCE_U : Pixel::CHROMINANCE_V);
860 Internal::Adaptor::PixelBufferPtr internal = Internal::Adaptor::PixelBuffer::New(buffer, planeSize, width, height, planeWidth, pixelFormat);
861 Dali::Devel::PixelBuffer bitmap = Devel::PixelBuffer(internal.Get());
863 pixelBuffers.push_back(bitmap);
868 int decodeResult = tjDecompressToYUVPlanes(jpeg.get(), jpegBufferPtr, jpegBufferSize, reinterpret_cast<unsigned char**>(&planes), scaledPostXformWidth, nullptr, scaledPostXformHeight, flags);
869 if(decodeResult == -1 && IsJpegDecodingFailed())
871 pixelBuffers.clear();
879 // Colorspace conversion options
880 TJPF pixelLibJpegType = TJPF_RGB;
881 Pixel::Format pixelFormat = Pixel::RGB888;
883 GetJpegPixelFormat(jpegColorspace, pixelLibJpegType, pixelFormat);
885 // Allocate a bitmap and decompress the jpeg buffer into its pixel buffer:
886 Dali::Devel::PixelBuffer bitmap = Dali::Devel::PixelBuffer::New(scaledPostXformWidth, scaledPostXformHeight, pixelFormat);
889 if(DALI_LIKELY(exifData))
891 std::unique_ptr<Property::Map> exifMap = std::make_unique<Property::Map>();
893 for(auto k = 0u; k < EXIF_IFD_COUNT; ++k)
895 auto content = exifData->ifd[k];
896 for(auto i = 0u; i < content->count; ++i)
898 auto&& tag = content->entries[i];
899 const char* shortName = exif_tag_get_name_in_ifd(tag->tag, static_cast<ExifIfd>(k));
902 AddExifFieldPropertyMap(*exifMap, *tag, static_cast<ExifIfd>(k));
907 GetImplementation(bitmap).SetMetadata(std::move(exifMap));
910 auto bitmapPixelBuffer = bitmap.GetBuffer();
913 int decodeResult = tjDecompress2(jpeg.get(), jpegBufferPtr, jpegBufferSize, reinterpret_cast<unsigned char*>(bitmapPixelBuffer), scaledPreXformWidth, 0, scaledPreXformHeight, pixelLibJpegType, flags);
914 if(decodeResult == -1 && IsJpegDecodingFailed())
918 pixelBuffers.push_back(bitmap);
921 result = TransformBitmap(scaledPreXformWidth, scaledPreXformHeight, transform, bitmapPixelBuffer, pixelFormat);
927 bool EncodeToJpeg(const unsigned char* const pixelBuffer, Vector<unsigned char>& encodedPixels, const std::size_t width, const std::size_t height, const Pixel::Format pixelFormat, unsigned quality)
931 DALI_LOG_ERROR("Null input buffer\n");
935 // Translate pixel format enum:
936 int jpegPixelFormat = -1;
942 jpegPixelFormat = TJPF_RGB;
945 case Pixel::RGBA8888:
948 jpegPixelFormat = TJPF_RGBX;
951 case Pixel::BGRA8888:
954 jpegPixelFormat = TJPF_BGRX;
959 DALI_LOG_ERROR("Unsupported pixel format for encoding to JPEG.\n");
964 // Assert quality is in the documented allowable range of the jpeg-turbo lib:
965 DALI_ASSERT_DEBUG(quality >= 1);
966 DALI_ASSERT_DEBUG(quality <= 100);
976 // Initialise a JPEG codec:
978 auto jpeg = MakeJpegCompressor();
979 if(DALI_UNLIKELY(!jpeg))
981 DALI_LOG_ERROR("JPEG Compressor init failed: %s\n", tjGetErrorStr());
985 // Safely wrap the jpeg codec's buffer in case we are about to throw, then
986 // save the pixels to a persistent buffer that we own and let our cleaner
987 // class clean up the buffer as it goes out of scope:
988 auto dstBuffer = MakeJpegMemory();
990 // Run the compressor:
991 unsigned long dstBufferSize = 0;
994 if(DALI_UNLIKELY(tjCompress2(jpeg.get(),
995 const_cast<unsigned char*>(pixelBuffer),
1000 SetPointer(dstBuffer),
1006 DALI_LOG_ERROR("JPEG Compression failed: %s\n", tjGetErrorStr());
1010 encodedPixels.ResizeUninitialized(dstBufferSize);
1011 memcpy(encodedPixels.Begin(), dstBuffer.get(), dstBufferSize);
1016 JpegTransform ConvertExifOrientation(ExifData* exifData)
1018 auto transform = JpegTransform::NONE;
1019 ExifEntry* const entry = exif_data_get_entry(exifData, EXIF_TAG_ORIENTATION);
1020 int orientation = 0;
1023 orientation = exif_get_short(entry->data, exif_data_get_byte_order(entry->parent->parent));
1028 transform = JpegTransform::NONE;
1033 transform = JpegTransform::FLIP_HORIZONTAL;
1038 transform = JpegTransform::ROTATE_180;
1043 transform = JpegTransform::FLIP_VERTICAL;
1048 transform = JpegTransform::TRANSPOSE;
1053 transform = JpegTransform::ROTATE_90;
1058 transform = JpegTransform::TRANSVERSE;
1063 transform = JpegTransform::ROTATE_270;
1068 // Try to keep loading the file, but let app developer know there was something fishy:
1069 DALI_LOG_WARNING("Incorrect/Unknown Orientation setting found in EXIF header of JPEG image (%x). Orientation setting will be ignored.\n", entry);
1077 bool TransformSize(int requiredWidth, int requiredHeight, FittingMode::Type fittingMode, SamplingMode::Type samplingMode, JpegTransform transform, int& preXformImageWidth, int& preXformImageHeight, int& postXformImageWidth, int& postXformImageHeight)
1079 bool success = true;
1080 if(transform == JpegTransform::TRANSPOSE || transform == JpegTransform::ROTATE_90 || transform == JpegTransform::TRANSVERSE || transform == JpegTransform::ROTATE_270)
1082 std::swap(requiredWidth, requiredHeight);
1083 std::swap(postXformImageWidth, postXformImageHeight);
1086 // Apply the special rules for when there are one or two zeros in requested dimensions:
1087 const ImageDimensions correctedDesired = Internal::Platform::CalculateDesiredDimensions(ImageDimensions(postXformImageWidth, postXformImageHeight), ImageDimensions(requiredWidth, requiredHeight));
1088 requiredWidth = correctedDesired.GetWidth();
1089 requiredHeight = correctedDesired.GetHeight();
1091 // Rescale image during decode using one of the decoder's built-in rescaling
1092 // ratios (expected to be powers of 2), keeping the final image at least as
1093 // wide and high as was requested:
1096 tjscalingfactor* factors = tjGetScalingFactors(&numFactors);
1097 if(DALI_UNLIKELY(factors == NULL))
1099 DALI_LOG_WARNING("TurboJpeg tjGetScalingFactors error!\n");
1104 // Internal jpeg downscaling is the same as our BOX_X sampling modes so only
1105 // apply it if the application requested one of those:
1106 // (use a switch case here so this code will fail to compile if other modes are added)
1107 bool downscale = true;
1108 switch(samplingMode)
1110 case SamplingMode::BOX:
1111 case SamplingMode::BOX_THEN_NEAREST:
1112 case SamplingMode::BOX_THEN_LINEAR:
1113 case SamplingMode::DONT_CARE:
1118 case SamplingMode::NO_FILTER:
1119 case SamplingMode::NEAREST:
1120 case SamplingMode::LINEAR:
1127 int scaleFactorIndex(0);
1130 // Find nearest supported scaling factor (factors are in sequential order, getting smaller)
1131 for(int i = 1; i < numFactors; ++i)
1133 bool widthLessRequired = TJSCALED(postXformImageWidth, factors[i]) < requiredWidth;
1134 bool heightLessRequired = TJSCALED(postXformImageHeight, factors[i]) < requiredHeight;
1135 // If either scaled dimension is smaller than the desired one, we were done at the last iteration
1136 if((fittingMode == FittingMode::SCALE_TO_FILL) && (widthLessRequired || heightLessRequired))
1140 // If both dimensions are smaller than the desired one, we were done at the last iteration:
1141 if((fittingMode == FittingMode::SHRINK_TO_FIT) && (widthLessRequired && heightLessRequired))
1145 // If the width is smaller than the desired one, we were done at the last iteration:
1146 if(fittingMode == FittingMode::FIT_WIDTH && widthLessRequired)
1150 // If the width is smaller than the desired one, we were done at the last iteration:
1151 if(fittingMode == FittingMode::FIT_HEIGHT && heightLessRequired)
1155 // This factor stays is within our fitting mode constraint so remember it:
1156 scaleFactorIndex = i;
1160 // Regardless of requested size, downscale to avoid exceeding the maximum texture size:
1161 for(int i = scaleFactorIndex; i < numFactors; ++i)
1163 // Continue downscaling to below maximum texture size (if possible)
1164 scaleFactorIndex = i;
1166 if(TJSCALED(postXformImageWidth, (factors[i])) < static_cast<int>(Dali::GetMaxTextureSize()) &&
1167 TJSCALED(postXformImageHeight, (factors[i])) < static_cast<int>(Dali::GetMaxTextureSize()))
1169 // Current scale-factor downscales to below maximum texture size
1174 // We have finally chosen the scale-factor, return width/height values
1175 if(scaleFactorIndex > 0)
1177 preXformImageWidth = TJSCALED(preXformImageWidth, (factors[scaleFactorIndex]));
1178 preXformImageHeight = TJSCALED(preXformImageHeight, (factors[scaleFactorIndex]));
1179 postXformImageWidth = TJSCALED(postXformImageWidth, (factors[scaleFactorIndex]));
1180 postXformImageHeight = TJSCALED(postXformImageHeight, (factors[scaleFactorIndex]));
1187 ExifHandle LoadExifData(FILE* fp)
1189 auto exifData = MakeNullExifData();
1190 unsigned char dataBuffer[1024];
1192 if(DALI_UNLIKELY(fseek(fp, 0, SEEK_SET)))
1194 DALI_LOG_ERROR("Error seeking to start of file\n");
1198 auto exifLoader = std::unique_ptr<ExifLoader, decltype(exif_loader_unref)*>{
1199 exif_loader_new(), exif_loader_unref};
1203 int size = fread(dataBuffer, 1, sizeof(dataBuffer), fp);
1208 if(!exif_loader_write(exifLoader.get(), dataBuffer, size))
1214 exifData.reset(exif_loader_get_data(exifLoader.get()));
1220 bool LoadJpegHeader(const Dali::ImageLoader::Input& input, unsigned int& width, unsigned int& height)
1222 unsigned int requiredWidth = input.scalingParameters.dimensions.GetWidth();
1223 unsigned int requiredHeight = input.scalingParameters.dimensions.GetHeight();
1224 FILE* const fp = input.file;
1226 bool success = false;
1228 unsigned int headerWidth;
1229 unsigned int headerHeight;
1231 success = LoadJpegHeader(fp, headerWidth, headerHeight);
1232 if(DALI_LIKELY(success))
1234 auto transform = JpegTransform::NONE;
1236 if(input.reorientationRequested)
1238 auto exifData = LoadExifData(fp);
1241 transform = ConvertExifOrientation(exifData.get());
1245 if(requiredWidth == 0 && requiredHeight == 0)
1247 if(transform == JpegTransform::TRANSPOSE || transform == JpegTransform::ROTATE_90 || transform == JpegTransform::TRANSVERSE || transform == JpegTransform::ROTATE_270)
1249 std::swap(headerWidth, headerHeight);
1254 int preXformImageWidth = headerWidth;
1255 int preXformImageHeight = headerHeight;
1256 int postXformImageWidth = headerWidth;
1257 int postXformImageHeight = headerHeight;
1259 success = TransformSize(requiredWidth, requiredHeight, input.scalingParameters.scalingMode, input.scalingParameters.samplingMode, transform, preXformImageWidth, preXformImageHeight, postXformImageWidth, postXformImageHeight);
1262 headerWidth = postXformImageWidth;
1263 headerHeight = postXformImageHeight;
1266 width = headerWidth;
1267 height = headerHeight;
1273 } // namespace TizenPlatform