diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/extension/internal/image-resolution.cpp | 379 |
1 files changed, 200 insertions, 179 deletions
diff --git a/src/extension/internal/image-resolution.cpp b/src/extension/internal/image-resolution.cpp index 53fcc0fbf..a17a2bb30 100644 --- a/src/extension/internal/image-resolution.cpp +++ b/src/extension/internal/image-resolution.cpp @@ -27,27 +27,30 @@ namespace Extension { namespace Internal { ImageResolution::ImageResolution(char const *fn) { - ok_ = false; - - readpng(fn); - if (!ok_) - readexif(fn); - if (!ok_) - readexiv(fn); - if (!ok_) - readjfif(fn); + ok_ = false; + + readpng(fn); + if (!ok_) { + readexiv(fn); + } + if (!ok_) { + readjfif(fn); + } + if (!ok_) { + readexif(fn); + } } bool ImageResolution::ok() const { - return ok_; + return ok_; } double ImageResolution::x() const { - return x_; + return x_; } double ImageResolution::y() const { - return y_; + return y_; } @@ -57,60 +60,62 @@ double ImageResolution::y() const { #include <png.h> static bool haspngheader(FILE *fp) { - unsigned char header[8]; - if (fread(header, 1, 8, fp)!=8) - return false; + unsigned char header[8]; + if ( fread(header, 1, 8, fp) != 8 ) { + return false; + } - fseek(fp, 0, SEEK_SET); - - if (png_sig_cmp(header, 0, 8)) - return false; + fseek(fp, 0, SEEK_SET); + + if (png_sig_cmp(header, 0, 8)) { + return false; + } - return true; + return true; } // Implementation using libpng void ImageResolution::readpng(char const *fn) { - FILE *fp = fopen(fn, "rb"); - if (!fp) - return; + FILE *fp = fopen(fn, "rb"); + if (!fp) + return; - if (!haspngheader(fp)) { - fclose(fp); - return; - } + if (!haspngheader(fp)) { + fclose(fp); + return; + } - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0); - if (!png_ptr) - return; - - png_infop info_ptr = png_create_info_struct(png_ptr); - if (!png_ptr) { - png_destroy_read_struct(&png_ptr, 0, 0); - return; - } - - if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, 0); - fclose(fp); - return; - } + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0); + if (!png_ptr) + return; + + png_infop info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { + png_destroy_read_struct(&png_ptr, 0, 0); + return; + } + + if (setjmp(png_jmpbuf(png_ptr))) { + png_destroy_read_struct(&png_ptr, &info_ptr, 0); + fclose(fp); + return; + } - png_init_io(png_ptr, fp); - png_read_info(png_ptr, info_ptr); + png_init_io(png_ptr, fp); + png_read_info(png_ptr, info_ptr); - png_uint_32 res_x, res_y; - int unit_type; - png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y, &unit_type); + png_uint_32 res_x, res_y; + int unit_type; + png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y, &unit_type); - png_destroy_read_struct(&png_ptr, &info_ptr, 0); - fclose(fp); + png_destroy_read_struct(&png_ptr, &info_ptr, 0); + fclose(fp); - if (unit_type == PNG_RESOLUTION_METER) { - ok_ = true; - x_ = res_x * 2.54/100; - y_ = res_y * 2.54/100; - } + if (unit_type == PNG_RESOLUTION_METER) { + ok_ = true; + x_ = res_x * 2.54 / 100; + y_ = res_y * 2.54 / 100; + } } #else @@ -126,63 +131,71 @@ void ImageResolution::readpng(char const *) { #include <libexif/exif-data.h> static double exifDouble(ExifEntry *entry, ExifByteOrder byte_order) { - switch (entry->format) { - case EXIF_FORMAT_BYTE: - return double(entry->data[0]); - case EXIF_FORMAT_SHORT: - return double(exif_get_short(entry->data, byte_order)); - case EXIF_FORMAT_LONG: - return double(exif_get_long(entry->data, byte_order)); - case EXIF_FORMAT_RATIONAL: { - ExifRational r = exif_get_rational(entry->data, byte_order); - return double(r.numerator)/double(r.denominator); - } - case EXIF_FORMAT_SBYTE: - return double(*(signed char *)entry->data); - case EXIF_FORMAT_SSHORT: - return double(exif_get_sshort(entry->data, byte_order)); - case EXIF_FORMAT_SLONG: - return double(exif_get_slong(entry->data, byte_order)); - case EXIF_FORMAT_SRATIONAL: { - ExifSRational r = exif_get_srational(entry->data, byte_order); - return double(r.numerator)/double(r.denominator); - } - case EXIF_FORMAT_FLOAT: - return double(((float *)entry->data)[0]); - case EXIF_FORMAT_DOUBLE: - return ((double *)entry->data)[0]; - default: - return nan(0); - } + switch (entry->format) { + case EXIF_FORMAT_BYTE: { + return double(entry->data[0]); + } + case EXIF_FORMAT_SHORT: { + return double(exif_get_short(entry->data, byte_order)); + } + case EXIF_FORMAT_LONG: { + return double(exif_get_long(entry->data, byte_order)); + } + case EXIF_FORMAT_RATIONAL: { + ExifRational r = exif_get_rational(entry->data, byte_order); + return double(r.numerator) / double(r.denominator); + } + case EXIF_FORMAT_SBYTE: { + return double(*(signed char *)entry->data); + } + case EXIF_FORMAT_SSHORT: { + return double(exif_get_sshort(entry->data, byte_order)); + } + case EXIF_FORMAT_SLONG: { + return double(exif_get_slong(entry->data, byte_order)); + } + case EXIF_FORMAT_SRATIONAL: { + ExifSRational r = exif_get_srational(entry->data, byte_order); + return double(r.numerator) / double(r.denominator); + } + case EXIF_FORMAT_FLOAT: { + return double(((float *)entry->data)[0]); + } + case EXIF_FORMAT_DOUBLE: { + return ((double *)entry->data)[0]; + } + default: { + return nan(0); + } + } } // Implementation using libexif void ImageResolution::readexif(char const *fn) { - ExifData *ed; - ed = exif_data_new_from_file(fn); - if (!ed) - return; - ExifByteOrder byte_order = exif_data_get_byte_order(ed); - - ExifEntry *xres = exif_content_get_entry(ed->ifd[EXIF_IFD_0], - EXIF_TAG_X_RESOLUTION); - ExifEntry *yres = exif_content_get_entry(ed->ifd[EXIF_IFD_0], - EXIF_TAG_Y_RESOLUTION); - ExifEntry *unit = exif_content_get_entry(ed->ifd[EXIF_IFD_0], - EXIF_TAG_RESOLUTION_UNIT); - if (xres && yres) { - x_ = exifDouble(xres, byte_order); - y_ = exifDouble(yres, byte_order); - if (unit) { - double u = exifDouble(unit, byte_order); - if (u==3) { - x_ *= 2.54; - y_ *= 2.54; - } + ExifData *ed; + ed = exif_data_new_from_file(fn); + if (!ed) + return; + + ExifByteOrder byte_order = exif_data_get_byte_order(ed); + + ExifEntry *xres = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_X_RESOLUTION); + ExifEntry *yres = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_Y_RESOLUTION); + ExifEntry *unit = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_RESOLUTION_UNIT); + + if ( xres && yres ) { + x_ = exifDouble(xres, byte_order); + y_ = exifDouble(yres, byte_order); + if (unit) { + double u = exifDouble(unit, byte_order); + if ( u == 3 ) { + x_ *= 2.54; + y_ *= 2.54; + } + } + ok_ = true; } - ok_ = true; - } - exif_data_free(ed); + exif_data_free(ed); } #else @@ -196,43 +209,43 @@ void ImageResolution::readexif(char const *) { #if IR_TRY_EXIV void ImageResolution::readexiv(char const *fn) { - Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(fn); - if (!image.get()) - return; - - image->readMetadata(); - Exiv2::ExifData &exifData = image->exifData(); - if (exifData.empty()) - return; - - Exiv2::ExifData::const_iterator end = exifData.end(); - bool havex = false; - bool havey = false; - bool haveunit = false; - int unit; - for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) { - if (ok_) - break; - if (i->tag()==0x011a) { - // X Resolution - x_ = i->toFloat(); - havex = true; - } else if (i->tag()==0x011b) { - // Y Resolution - y_ = i->toFloat(); - havey = true; - } else if (i->tag()==0x0128) { - unit = i->toLong(); + Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(fn); + if (!image.get()) + return; + + image->readMetadata(); + Exiv2::ExifData &exifData = image->exifData(); + if (exifData.empty()) + return; + + Exiv2::ExifData::const_iterator end = exifData.end(); + bool havex = false; + bool havey = false; + bool haveunit = false; + int unit; + for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) { + if (ok_) + break; + if ( i->tag() == 0x011a ) { + // X Resolution + x_ = i->toFloat(); + havex = true; + } else if ( i->tag() == 0x011b ) { + // Y Resolution + y_ = i->toFloat(); + havey = true; + } else if ( i->tag() == 0x0128 ) { + unit = i->toLong(); + } + ok_ = havex && havey && haveunit; } - ok_ = havex && havey && haveunit; - } - if (haveunit) { - if (unit==3) { - x_ *= 2.54; - y_ *= 2.54; + if (haveunit) { + if ( unit == 3 ) { + x_ *= 2.54; + y_ *= 2.54; + } } - } - ok_ = havex && havey; + ok_ = havex && havey; } #else @@ -249,7 +262,7 @@ void ImageResolution::readexiv(char const *) { #include <setjmp.h> static void irjfif_error_exit(j_common_ptr cinfo) { - longjmp(*(jmp_buf*)cinfo->client_data, 1); + longjmp(*(jmp_buf*)cinfo->client_data, 1); } static void irjfif_emit_message(j_common_ptr, int) { @@ -265,44 +278,52 @@ static void irjfif_reset(j_common_ptr) { } void ImageResolution::readjfif(char const *fn) { - FILE *ifd = fopen(fn, "rb"); - if (!ifd) - return; - - struct jpeg_decompress_struct cinfo; - jmp_buf jbuf; - struct jpeg_error_mgr jerr; - bool constr = false; + FILE *ifd = fopen(fn, "rb"); + if (!ifd) { + return; + } - if (setjmp(jbuf)) { + struct jpeg_decompress_struct cinfo; + jmp_buf jbuf; + struct jpeg_error_mgr jerr; + bool constr = false; + + if (setjmp(jbuf)) { + fclose(ifd); + if (constr) { + jpeg_destroy_decompress(&cinfo); + } + return; + } + + cinfo.err = jpeg_std_error(&jerr); + jpeg_create_decompress(&cinfo); + jerr.error_exit = &irjfif_error_exit; + jerr.emit_message = &irjfif_emit_message; + jerr.output_message = &irjfif_output_message; + jerr.format_message = &irjfif_format_message; + jerr.reset_error_mgr = &irjfif_reset; + cinfo.client_data = (void*)&jbuf; + + constr = true; + + jpeg_stdio_src(&cinfo, ifd); + jpeg_read_header(&cinfo, TRUE); + + if (cinfo.saw_JFIF_marker) { // JFIF APP0 marker was seen + if ( cinfo.density_unit == 1 ) { // dots/inch + x_ = cinfo.X_density; + y_ = cinfo.Y_density; + ok_ = true; + } else if ( cinfo.density_unit == 2 ) { // dots/cm + x_ = cinfo.X_density * 2.54; + y_ = cinfo.Y_density * 2.54; + ok_ = true; + } + } + constr = false; + jpeg_destroy_decompress(&cinfo); fclose(ifd); - if (constr) - jpeg_destroy_decompress(&cinfo); - return; - } - - cinfo.err = jpeg_std_error(&jerr); - jpeg_create_decompress(&cinfo); - jerr.error_exit = &irjfif_error_exit; - jerr.emit_message = &irjfif_emit_message; - jerr.output_message = &irjfif_output_message; - jerr.format_message = &irjfif_format_message; - jerr.reset_error_mgr = &irjfif_reset; - cinfo.client_data = (void*)&jbuf; - constr = true; - - jpeg_stdio_src(&cinfo, ifd); - jpeg_read_header(&cinfo, TRUE); - - if (cinfo.density_unit==1) { - x_ = cinfo.X_density; - y_ = cinfo.Y_density; - ok_ = true; - } - - constr = false; - jpeg_destroy_decompress(&cinfo); - fclose(ifd); } #else @@ -312,7 +333,7 @@ void ImageResolution::readjfif(char const *) { } #endif - + } } } |