mirror of
https://github.com/minetest/irrlicht.git
synced 2024-09-07 05:10:19 +02:00
Replace a static variable which was used in error-reporting but wasn't thread-safe. git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6220 dfc29bdd-3216-0410-991c-e03cc46cb475
304 lines
7.4 KiB
C++
304 lines
7.4 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
|
|
// This file is part of the "Irrlicht Engine".
|
|
// For conditions of distribution and use, see copyright notice in irrlicht.h
|
|
|
|
#include "CImageLoaderJPG.h"
|
|
|
|
#ifdef _IRR_COMPILE_WITH_JPG_LOADER_
|
|
|
|
#include "IReadFile.h"
|
|
#include "CImage.h"
|
|
#include "os.h"
|
|
#include "irrString.h"
|
|
|
|
namespace irr
|
|
{
|
|
namespace video
|
|
{
|
|
|
|
//! constructor
|
|
CImageLoaderJPG::CImageLoaderJPG()
|
|
{
|
|
#ifdef _DEBUG
|
|
setDebugName("CImageLoaderJPG");
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
//! destructor
|
|
CImageLoaderJPG::~CImageLoaderJPG()
|
|
{
|
|
}
|
|
|
|
|
|
|
|
//! returns true if the file maybe is able to be loaded by this class
|
|
//! based on the file extension (e.g. ".tga")
|
|
bool CImageLoaderJPG::isALoadableFileExtension(const io::path& filename) const
|
|
{
|
|
return core::hasFileExtension ( filename, "jpg", "jpeg" );
|
|
}
|
|
|
|
|
|
#ifdef _IRR_COMPILE_WITH_LIBJPEG_
|
|
|
|
// struct for handling jpeg errors
|
|
struct irr_jpeg_error_mgr
|
|
{
|
|
// public jpeg error fields
|
|
struct jpeg_error_mgr pub;
|
|
|
|
// for longjmp, to return to caller on a fatal error
|
|
jmp_buf setjmp_buffer;
|
|
|
|
// for having access to the filename when printing the error messages
|
|
core::stringc* filename;
|
|
};
|
|
|
|
void CImageLoaderJPG::init_source (j_decompress_ptr cinfo)
|
|
{
|
|
// DO NOTHING
|
|
}
|
|
|
|
|
|
|
|
boolean CImageLoaderJPG::fill_input_buffer (j_decompress_ptr cinfo)
|
|
{
|
|
// DO NOTHING
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
void CImageLoaderJPG::skip_input_data (j_decompress_ptr cinfo, long count)
|
|
{
|
|
jpeg_source_mgr * src = cinfo->src;
|
|
if(count > 0)
|
|
{
|
|
src->bytes_in_buffer -= count;
|
|
src->next_input_byte += count;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void CImageLoaderJPG::term_source (j_decompress_ptr cinfo)
|
|
{
|
|
// DO NOTHING
|
|
}
|
|
|
|
|
|
void CImageLoaderJPG::error_exit (j_common_ptr cinfo)
|
|
{
|
|
// unfortunately we need to use a goto rather than throwing an exception
|
|
// as gcc crashes under linux crashes when using throw from within
|
|
// extern c code
|
|
|
|
// Always display the message
|
|
(*cinfo->err->output_message) (cinfo);
|
|
|
|
// cinfo->err really points to a irr_error_mgr struct
|
|
irr_jpeg_error_mgr *myerr = (irr_jpeg_error_mgr*) cinfo->err;
|
|
|
|
longjmp(myerr->setjmp_buffer, 1);
|
|
}
|
|
|
|
|
|
void CImageLoaderJPG::output_message(j_common_ptr cinfo)
|
|
{
|
|
// display the error message.
|
|
c8 temp1[JMSG_LENGTH_MAX];
|
|
(*cinfo->err->format_message)(cinfo, temp1);
|
|
core::stringc errMsg("JPEG FATAL ERROR in ");
|
|
|
|
irr_jpeg_error_mgr* myerr = (irr_jpeg_error_mgr*)cinfo->err;
|
|
errMsg += *myerr->filename;
|
|
os::Printer::log(errMsg.c_str(),temp1, ELL_ERROR);
|
|
}
|
|
#endif // _IRR_COMPILE_WITH_LIBJPEG_
|
|
|
|
//! returns true if the file maybe is able to be loaded by this class
|
|
bool CImageLoaderJPG::isALoadableFileFormat(io::IReadFile* file) const
|
|
{
|
|
#ifndef _IRR_COMPILE_WITH_LIBJPEG_
|
|
return false;
|
|
#else
|
|
|
|
if (!(file && file->seek(0)))
|
|
return false;
|
|
unsigned char header[3];
|
|
size_t headerLen = file->read(header, sizeof(header));
|
|
return headerLen >= 3 && !memcmp(header, "\xFF\xD8\xFF", 3);
|
|
#endif
|
|
}
|
|
|
|
//! creates a surface from the file
|
|
IImage* CImageLoaderJPG::loadImage(io::IReadFile* file) const
|
|
{
|
|
#ifndef _IRR_COMPILE_WITH_LIBJPEG_
|
|
os::Printer::log("Can't load as not compiled with _IRR_COMPILE_WITH_LIBJPEG_:", file->getFileName(), ELL_DEBUG);
|
|
return 0;
|
|
#else
|
|
|
|
if (!file)
|
|
return 0;
|
|
|
|
core::stringc filename = file->getFileName();
|
|
|
|
u8 **rowPtr=0;
|
|
u8* input = new u8[file->getSize()];
|
|
file->read(input, file->getSize());
|
|
|
|
// allocate and initialize JPEG decompression object
|
|
struct jpeg_decompress_struct cinfo;
|
|
struct irr_jpeg_error_mgr jerr;
|
|
|
|
//We have to set up the error handler first, in case the initialization
|
|
//step fails. (Unlikely, but it could happen if you are out of memory.)
|
|
//This routine fills in the contents of struct jerr, and returns jerr's
|
|
//address which we place into the link field in cinfo.
|
|
|
|
cinfo.err = jpeg_std_error(&jerr.pub);
|
|
cinfo.err->error_exit = error_exit;
|
|
cinfo.err->output_message = output_message;
|
|
jerr.filename = &filename;
|
|
|
|
// compatibility fudge:
|
|
// we need to use setjmp/longjmp for error handling as gcc-linux
|
|
// crashes when throwing within external c code
|
|
if (setjmp(jerr.setjmp_buffer))
|
|
{
|
|
// If we get here, the JPEG code has signaled an error.
|
|
// We need to clean up the JPEG object and return.
|
|
|
|
jpeg_destroy_decompress(&cinfo);
|
|
|
|
delete [] input;
|
|
delete [] rowPtr;
|
|
|
|
// return null pointer
|
|
return 0;
|
|
}
|
|
|
|
// Now we can initialize the JPEG decompression object.
|
|
jpeg_create_decompress(&cinfo);
|
|
|
|
// specify data source
|
|
jpeg_source_mgr jsrc;
|
|
|
|
// Set up data pointer
|
|
jsrc.bytes_in_buffer = file->getSize();
|
|
jsrc.next_input_byte = (JOCTET*)input;
|
|
cinfo.src = &jsrc;
|
|
|
|
jsrc.init_source = init_source;
|
|
jsrc.fill_input_buffer = fill_input_buffer;
|
|
jsrc.skip_input_data = skip_input_data;
|
|
jsrc.resync_to_restart = jpeg_resync_to_restart;
|
|
jsrc.term_source = term_source;
|
|
|
|
// Decodes JPG input from whatever source
|
|
// Does everything AFTER jpeg_create_decompress
|
|
// and BEFORE jpeg_destroy_decompress
|
|
// Caller is responsible for arranging these + setting up cinfo
|
|
|
|
// read file parameters with jpeg_read_header()
|
|
jpeg_read_header(&cinfo, TRUE);
|
|
|
|
bool useCMYK=false;
|
|
if (cinfo.jpeg_color_space==JCS_CMYK)
|
|
{
|
|
cinfo.out_color_space=JCS_CMYK;
|
|
cinfo.out_color_components=4;
|
|
useCMYK=true;
|
|
}
|
|
else
|
|
{
|
|
cinfo.out_color_space=JCS_RGB;
|
|
cinfo.out_color_components=3;
|
|
}
|
|
cinfo.output_gamma=2.2;
|
|
cinfo.do_fancy_upsampling=FALSE;
|
|
|
|
// Start decompressor
|
|
jpeg_start_decompress(&cinfo);
|
|
|
|
// Get image data
|
|
u16 rowspan = cinfo.image_width * cinfo.out_color_components;
|
|
u32 width = cinfo.image_width;
|
|
u32 height = cinfo.image_height;
|
|
|
|
// Allocate memory for buffer
|
|
u8* output = new u8[rowspan * height];
|
|
|
|
// Here we use the library's state variable cinfo.output_scanline as the
|
|
// loop counter, so that we don't have to keep track ourselves.
|
|
// Create array of row pointers for lib
|
|
rowPtr = new u8* [height];
|
|
|
|
for( u32 i = 0; i < height; i++ )
|
|
rowPtr[i] = &output[ i * rowspan ];
|
|
|
|
u32 rowsRead = 0;
|
|
|
|
while( cinfo.output_scanline < cinfo.output_height )
|
|
rowsRead += jpeg_read_scanlines( &cinfo, &rowPtr[rowsRead], cinfo.output_height - rowsRead );
|
|
|
|
delete [] rowPtr;
|
|
// Finish decompression
|
|
|
|
jpeg_finish_decompress(&cinfo);
|
|
|
|
// Release JPEG decompression object
|
|
// This is an important step since it will release a good deal of memory.
|
|
jpeg_destroy_decompress(&cinfo);
|
|
|
|
// convert image
|
|
IImage* image = 0;
|
|
if (useCMYK)
|
|
{
|
|
image = new CImage(ECF_R8G8B8,
|
|
core::dimension2d<u32>(width, height));
|
|
const u32 size = 3*width*height;
|
|
u8* data = (u8*)image->getData();
|
|
if (data)
|
|
{
|
|
for (u32 i=0,j=0; i<size; i+=3, j+=4)
|
|
{
|
|
// Also works without K, but has more contrast with K multiplied in
|
|
// data[i+0] = output[j+2];
|
|
// data[i+1] = output[j+1];
|
|
// data[i+2] = output[j+0];
|
|
data[i+0] = (char)(output[j+2]*(output[j+3]/255.f));
|
|
data[i+1] = (char)(output[j+1]*(output[j+3]/255.f));
|
|
data[i+2] = (char)(output[j+0]*(output[j+3]/255.f));
|
|
}
|
|
}
|
|
delete [] output;
|
|
}
|
|
else
|
|
image = new CImage(ECF_R8G8B8,
|
|
core::dimension2d<u32>(width, height), output);
|
|
|
|
delete [] input;
|
|
|
|
return image;
|
|
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
//! creates a loader which is able to load jpeg images
|
|
IImageLoader* createImageLoaderJPG()
|
|
{
|
|
return new CImageLoaderJPG();
|
|
}
|
|
|
|
} // end namespace video
|
|
} // end namespace irr
|
|
|
|
#endif
|
|
|