diff options
Diffstat (limited to 'indra/llimage')
| -rw-r--r-- | indra/llimage/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | indra/llimage/llimagedimensionsinfo.cpp | 139 | ||||
| -rw-r--r-- | indra/llimage/llimagedimensionsinfo.h | 139 |
3 files changed, 280 insertions, 0 deletions
diff --git a/indra/llimage/CMakeLists.txt b/indra/llimage/CMakeLists.txt index 22be4078a1..a69621a57b 100644 --- a/indra/llimage/CMakeLists.txt +++ b/indra/llimage/CMakeLists.txt @@ -21,6 +21,7 @@ include_directories( set(llimage_SOURCE_FILES llimagebmp.cpp llimage.cpp + llimagedimensionsinfo.cpp llimagedxt.cpp llimagej2c.cpp llimagejpeg.cpp @@ -35,6 +36,7 @@ set(llimage_HEADER_FILES llimage.h llimagebmp.h + llimagedimensionsinfo.h llimagedxt.h llimagej2c.h llimagejpeg.h diff --git a/indra/llimage/llimagedimensionsinfo.cpp b/indra/llimage/llimagedimensionsinfo.cpp new file mode 100644 index 0000000000..890b49b50a --- /dev/null +++ b/indra/llimage/llimagedimensionsinfo.cpp @@ -0,0 +1,139 @@ +/** + * @file llimagedimensionsinfo.cpp + * + * $LicenseInfo:firstyear=2002&license=viewergpl$ + * + * Copyright (c) 2002-2009, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + * $/LicenseInfo$ + */ + +#include "linden_common.h" +#include "stdtypes.h" + +#include "llimagejpeg.h" + +#include "llimagedimensionsinfo.h" + +bool LLImageDimensionsInfo::load(const std::string& src_filename,U32 codec) +{ + clean(); + + mSrcFilename = src_filename; + + S32 file_size = 0; + apr_status_t s = mInfile.open(src_filename, LL_APR_RB, NULL, &file_size); + + if (s != APR_SUCCESS) + { + setLastError("Unable to open file for reading", src_filename); + return false; + } + + if (file_size == 0) + { + setLastError("File is empty",src_filename); + return false; + } + + switch (codec) + { + case IMG_CODEC_BMP: + return getImageDimensionsBmp(); + case IMG_CODEC_TGA: + return getImageDimensionsTga(); + case IMG_CODEC_JPEG: + return getImageDimensionsJpeg(); + case IMG_CODEC_PNG: + return getImageDimensionsPng(); + default: + return false; + + } +} + + +bool LLImageDimensionsInfo::getImageDimensionsBmp() +{ + const S32 BMP_FILE_HEADER_SIZE = 14; + + mInfile.seek(APR_CUR,BMP_FILE_HEADER_SIZE+4); + mWidth = read_reverse_s32(); + mHeight = read_reverse_s32(); + + return true; +} + +bool LLImageDimensionsInfo::getImageDimensionsTga() +{ + const S32 TGA_FILE_HEADER_SIZE = 12; + + mInfile.seek(APR_CUR,TGA_FILE_HEADER_SIZE); + mWidth = read_byte() | read_byte() << 8; + mHeight = read_byte() | read_byte() << 8; + + return true; +} + +bool LLImageDimensionsInfo::getImageDimensionsPng() +{ + const S32 PNG_FILE_MARKER_SIZE = 8; + + mInfile.seek(APR_CUR,PNG_FILE_MARKER_SIZE + 8/*header offset+chunk length+chunk type*/); + mWidth = read_s32(); + mHeight = read_s32(); + + return true; +} + + +bool LLImageDimensionsInfo::getImageDimensionsJpeg() +{ + clean(); + FILE *fp = fopen (mSrcFilename.c_str(), "rb"); + if (fp == NULL) + { + setLastError("Unable to open file for reading", mSrcFilename); + return false; + } + /* Init jpeg */ + jpeg_error_mgr jerr; + jpeg_decompress_struct cinfo; + cinfo.err = jpeg_std_error(&jerr); + + jpeg_create_decompress (&cinfo); + jpeg_stdio_src (&cinfo, fp); + jpeg_read_header (&cinfo, TRUE); + cinfo.out_color_space = JCS_RGB; + jpeg_start_decompress (&cinfo); + + mHeight = cinfo.output_width; + mHeight = cinfo.output_height; + + jpeg_destroy_decompress(&cinfo); + fclose(fp); + + return true; +} + diff --git a/indra/llimage/llimagedimensionsinfo.h b/indra/llimage/llimagedimensionsinfo.h new file mode 100644 index 0000000000..9e69635c1e --- /dev/null +++ b/indra/llimage/llimagedimensionsinfo.h @@ -0,0 +1,139 @@ +/**
+ * @file llimagedimentionsinfo.h
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ *
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ *
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab. Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ *
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ *
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+
+#ifndef LL_LLIMAGEDIMENSIONSINFO_H
+#define LL_LLIMAGEDIMENSIONSINFO_H
+
+//----------------------------------------------------------------------------- +// LLImageDimensionsInfo +// helper class to get image dimensions WITHOUT loading image to memore +// usefull when image may be too large... +//----------------------------------------------------------------------------- +class LLImageDimensionsInfo +{ +public: + LLImageDimensionsInfo(): + mData(NULL) + ,mHeight(0) + ,mWidth(0) + {} + ~LLImageDimensionsInfo() + { + clean(); + } + + bool load(const std::string& src_filename,U32 codec); + S32 getWidth() const { return mWidth;} + S32 getHeight() const { return mHeight;} + + const std::string& getLastError() + { + return mLastError; + } +protected: + + void clean() + { + mInfile.close(); + delete[] mData; + mData = NULL; + mWidth = 0; + mHeight = 0; + } + + U8* getData() + { + return mData; + } + + + void setLastError(const std::string& message, const std::string& filename) + { + std::string error = message; + if (!filename.empty()) + error += std::string(" FILE: ") + filename; + mLastError = error; + } + + + bool getImageDimensionsBmp(); + bool getImageDimensionsTga(); + bool getImageDimensionsPng(); + bool getImageDimensionsJpeg(); + + S32 read_s32() + { + char p[4]; + mInfile.read(&p[0],4); + S32 temp = (((S32)p[3]) & 0x000000FF) | + (((S32)p[2] << 8 ) & 0x0000FF00) | + (((S32)p[1] << 16) & 0x00FF0000) | + (((S32)p[0] << 24) & 0xFF000000); + + return temp; + } + S32 read_reverse_s32() + { + char p[4]; + mInfile.read(&p[0],4); + S32 temp = (((S32)p[0]) & 0x000000FF) | + (((S32)p[1] << 8 ) & 0x0000FF00) | + (((S32)p[2] << 16) & 0x00FF0000) | + (((S32)p[3] << 24) & 0xFF000000); + + return temp; + } + + U8 read_byte() + { + U8 bt; + mInfile.read(&bt,1); + return bt; + } + + U16 read_short() + { + return read_byte() << 8 | read_byte(); + } + +protected: + LLAPRFile mInfile ; + std::string mSrcFilename; + + std::string mLastError; + + U8* mData; + + S32 mWidth; + S32 mHeight; +}; +#endif |