+++ /dev/null
-/*
-Copyright (c) 2001, Loki software, inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
-Redistributions of source code must retain the above copyright notice, this list
-of conditions and the following disclaimer.
-
-Redistributions in binary form must reproduce the above copyright notice, this
-list of conditions and the following disclaimer in the documentation and/or
-other materials provided with the distribution.
-
-Neither the name of Loki software nor the names of its contributors may be used
-to endorse or promote products derived from this software without specific prior
-written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-//
-// Functions to load JPEG files from a buffer, based on jdatasrc.c
-//
-// Leonardo Zide (leo@lokigames.com)
-//
-
-#include "jpeg.h"
-
-#include <setjmp.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-extern "C" {
-#include "radiant_jpeglib.h"
-#include "jpeg6/jerror.h"
-}
-
-#include "ifilesystem.h"
-
-#include "imagelib.h"
-
-typedef unsigned char byte;
-
-/* Expanded data source object for stdio input */
-
-typedef struct {
- struct jpeg_source_mgr pub; /* public fields */
-
- int src_size;
- JOCTET * src_buffer;
-
- JOCTET * buffer; /* start of buffer */
- boolean start_of_file; /* have we gotten any data yet? */
-} my_source_mgr;
-
-typedef my_source_mgr * my_src_ptr;
-
-#define INPUT_BUF_SIZE 4096 /* choose an efficiently fread'able size */
-
-
-/*
- * Initialize source --- called by jpeg_read_header
- * before any data is actually read.
- */
-
-static void my_init_source (j_decompress_ptr cinfo)
-{
- my_src_ptr src = (my_src_ptr) cinfo->src;
-
- /* We reset the empty-input-file flag for each image,
- * but we don't clear the input buffer.
- * This is correct behavior for reading a series of images from one source.
- */
- src->start_of_file = TRUE;
-}
-
-
-/*
- * Fill the input buffer --- called whenever buffer is emptied.
- *
- * In typical applications, this should read fresh data into the buffer
- * (ignoring the current state of next_input_byte & bytes_in_buffer),
- * reset the pointer & count to the start of the buffer, and return TRUE
- * indicating that the buffer has been reloaded. It is not necessary to
- * fill the buffer entirely, only to obtain at least one more byte.
- *
- * There is no such thing as an EOF return. If the end of the file has been
- * reached, the routine has a choice of ERREXIT() or inserting fake data into
- * the buffer. In most cases, generating a warning message and inserting a
- * fake EOI marker is the best course of action --- this will allow the
- * decompressor to output however much of the image is there. However,
- * the resulting error message is misleading if the real problem is an empty
- * input file, so we handle that case specially.
- *
- * In applications that need to be able to suspend compression due to input
- * not being available yet, a FALSE return indicates that no more data can be
- * obtained right now, but more may be forthcoming later. In this situation,
- * the decompressor will return to its caller (with an indication of the
- * number of scanlines it has read, if any). The application should resume
- * decompression after it has loaded more data into the input buffer. Note
- * that there are substantial restrictions on the use of suspension --- see
- * the documentation.
- *
- * When suspending, the decompressor will back up to a convenient restart point
- * (typically the start of the current MCU). next_input_byte & bytes_in_buffer
- * indicate where the restart point will be if the current call returns FALSE.
- * Data beyond this point must be rescanned after resumption, so move it to
- * the front of the buffer rather than discarding it.
- */
-
-static boolean my_fill_input_buffer (j_decompress_ptr cinfo)
-{
- my_src_ptr src = (my_src_ptr) cinfo->src;
- size_t nbytes;
-
- if (src->src_size > INPUT_BUF_SIZE)
- nbytes = INPUT_BUF_SIZE;
- else
- nbytes = src->src_size;
-
- memcpy (src->buffer, src->src_buffer, nbytes);
- src->src_buffer += nbytes;
- src->src_size -= nbytes;
-
- if (nbytes <= 0) {
- if (src->start_of_file) /* Treat empty input file as fatal error */
- ERREXIT(cinfo, JERR_INPUT_EMPTY);
- WARNMS(cinfo, JWRN_JPEG_EOF);
- /* Insert a fake EOI marker */
- src->buffer[0] = (JOCTET) 0xFF;
- src->buffer[1] = (JOCTET) JPEG_EOI;
- nbytes = 2;
- }
-
- src->pub.next_input_byte = src->buffer;
- src->pub.bytes_in_buffer = nbytes;
- src->start_of_file = FALSE;
-
- return TRUE;
-}
-
-
-/*
- * Skip data --- used to skip over a potentially large amount of
- * uninteresting data (such as an APPn marker).
- *
- * Writers of suspendable-input applications must note that skip_input_data
- * is not granted the right to give a suspension return. If the skip extends
- * beyond the data currently in the buffer, the buffer can be marked empty so
- * that the next read will cause a fill_input_buffer call that can suspend.
- * Arranging for additional bytes to be discarded before reloading the input
- * buffer is the application writer's problem.
- */
-
-static void my_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
-{
- my_src_ptr src = (my_src_ptr) cinfo->src;
-
- /* Just a dumb implementation for now. Could use fseek() except
- * it doesn't work on pipes. Not clear that being smart is worth
- * any trouble anyway --- large skips are infrequent.
- */
- if (num_bytes > 0) {
- while (num_bytes > (long) src->pub.bytes_in_buffer) {
- num_bytes -= (long) src->pub.bytes_in_buffer;
- (void) my_fill_input_buffer(cinfo);
- /* note we assume that fill_input_buffer will never return FALSE,
- * so suspension need not be handled.
- */
- }
- src->pub.next_input_byte += (size_t) num_bytes;
- src->pub.bytes_in_buffer -= (size_t) num_bytes;
- }
-}
-
-
-/*
- * An additional method that can be provided by data source modules is the
- * resync_to_restart method for error recovery in the presence of RST markers.
- * For the moment, this source module just uses the default resync method
- * provided by the JPEG library. That method assumes that no backtracking
- * is possible.
- */
-
-
-/*
- * Terminate source --- called by jpeg_finish_decompress
- * after all data has been read. Often a no-op.
- *
- * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
- * application must deal with any cleanup that should happen even
- * for error exit.
- */
-
-static void my_term_source (j_decompress_ptr cinfo)
-{
- /* no work necessary here */
-}
-
-
-/*
- * Prepare for input from a stdio stream.
- * The caller must have already opened the stream, and is responsible
- * for closing it after finishing decompression.
- */
-
-static void jpeg_buffer_src (j_decompress_ptr cinfo, void* buffer, int bufsize)
-{
- my_src_ptr src;
-
- /* The source object and input buffer are made permanent so that a series
- * of JPEG images can be read from the same file by calling jpeg_stdio_src
- * only before the first one. (If we discarded the buffer at the end of
- * one image, we'd likely lose the start of the next one.)
- * This makes it unsafe to use this manager and a different source
- * manager serially with the same JPEG object. Caveat programmer.
- */
- if (cinfo->src == NULL) { /* first time for this JPEG object? */
- cinfo->src = (struct jpeg_source_mgr *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
- sizeof (my_source_mgr));
- src = (my_src_ptr) cinfo->src;
- src->buffer = (JOCTET *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
- INPUT_BUF_SIZE * sizeof (JOCTET));
- }
-
- src = (my_src_ptr) cinfo->src;
- src->pub.init_source = my_init_source;
- src->pub.fill_input_buffer = my_fill_input_buffer;
- src->pub.skip_input_data = my_skip_input_data;
- src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
- src->pub.term_source = my_term_source;
- src->src_buffer = (JOCTET *)buffer;
- src->src_size = bufsize;
- src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
- src->pub.next_input_byte = NULL; /* until buffer loaded */
-}
-
-// =============================================================================
-
-static char errormsg[JMSG_LENGTH_MAX];
-
-typedef struct my_jpeg_error_mgr
-{
- struct jpeg_error_mgr pub; // "public" fields
- jmp_buf setjmp_buffer; // for return to caller
-} bt_jpeg_error_mgr;
-
-static void my_jpeg_error_exit (j_common_ptr cinfo)
-{
- my_jpeg_error_mgr* myerr = (bt_jpeg_error_mgr*) cinfo->err;
-
- (*cinfo->err->format_message) (cinfo, errormsg);
-
- longjmp (myerr->setjmp_buffer, 1);
-}
-
-// stash a scanline
-static void j_putRGBScanline (unsigned char* jpegline, int widthPix, unsigned char* outBuf, int row)
-{
- int offset = row * widthPix * 4;
- int count;
-
- for (count = 0; count < widthPix; count++)
- {
- unsigned char iRed, iBlu, iGrn;
- unsigned char *oRed, *oBlu, *oGrn, *oAlp;
-
- iRed = *(jpegline + count * 3 + 0);
- iGrn = *(jpegline + count * 3 + 1);
- iBlu = *(jpegline + count * 3 + 2);
-
- oRed = outBuf + offset + count * 4 + 0;
- oGrn = outBuf + offset + count * 4 + 1;
- oBlu = outBuf + offset + count * 4 + 2;
- oAlp = outBuf + offset + count * 4 + 3;
-
- *oRed = iRed;
- *oGrn = iGrn;
- *oBlu = iBlu;
- *oAlp = 255;
- }
-}
-
-// stash a scanline
-static void j_putRGBAScanline (unsigned char* jpegline, int widthPix, unsigned char* outBuf, int row)
-{
- int offset = row * widthPix * 4;
- int count;
-
- for (count = 0; count < widthPix; count++)
- {
- unsigned char iRed, iBlu, iGrn, iAlp;
- unsigned char *oRed, *oBlu, *oGrn, *oAlp;
-
- iRed = *(jpegline + count * 4 + 0);
- iGrn = *(jpegline + count * 4 + 1);
- iBlu = *(jpegline + count * 4 + 2);
- iAlp = *(jpegline + count * 4 + 3);
-
- oRed = outBuf + offset + count * 4 + 0;
- oGrn = outBuf + offset + count * 4 + 1;
- oBlu = outBuf + offset + count * 4 + 2;
- oAlp = outBuf + offset + count * 4 + 3;
-
- *oRed = iRed;
- *oGrn = iGrn;
- *oBlu = iBlu;
-
- //!\todo fix jpeglib, it leaves alpha channel uninitialised
-#if 1
- *oAlp = 255;
-#else
- *oAlp = iAlp;
-#endif
- }
-}
-
-// stash a gray scanline
-static void j_putGrayScanlineToRGB (unsigned char* jpegline, int widthPix, unsigned char* outBuf, int row)
-{
- int offset = row * widthPix * 4;
- int count;
-
- for (count = 0; count < widthPix; count++)
- {
- unsigned char iGray;
- unsigned char *oRed, *oBlu, *oGrn, *oAlp;
-
- // get our grayscale value
- iGray = *(jpegline + count);
-
- oRed = outBuf + offset + count * 4;
- oGrn = outBuf + offset + count * 4 + 1;
- oBlu = outBuf + offset + count * 4 + 2;
- oAlp = outBuf + offset + count * 4 + 3;
-
- *oRed = iGray;
- *oGrn = iGray;
- *oBlu = iGray;
- *oAlp = 255;
- }
-}
-
-static Image* LoadJPGBuff_(const void *src_buffer, int src_size)
-{
- struct jpeg_decompress_struct cinfo;
- struct my_jpeg_error_mgr jerr;
-
- cinfo.err = jpeg_std_error (&jerr.pub);
- jerr.pub.error_exit = my_jpeg_error_exit;
-
- if (setjmp (jerr.setjmp_buffer)) //< TODO: use c++ exceptions instead of setjmp/longjmp to handle errors
- {
- globalErrorStream() << "WARNING: JPEG library error: " << errormsg << "\n";
- jpeg_destroy_decompress (&cinfo);
- return 0;
- }
-
- jpeg_create_decompress (&cinfo);
- jpeg_buffer_src (&cinfo, const_cast<void*>(src_buffer), src_size);
- jpeg_read_header (&cinfo, TRUE);
- jpeg_start_decompress (&cinfo);
-
- int row_stride = cinfo.output_width * cinfo.output_components;
-
- RGBAImage* image = new RGBAImage(cinfo.output_width, cinfo.output_height);
-
- JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
-
- while (cinfo.output_scanline < cinfo.output_height)
- {
- jpeg_read_scanlines (&cinfo, buffer, 1);
-
- if (cinfo.out_color_components == 4)
- j_putRGBAScanline (buffer[0], cinfo.output_width, image->getRGBAPixels(), cinfo.output_scanline-1);
- else if (cinfo.out_color_components == 3)
- j_putRGBScanline (buffer[0], cinfo.output_width, image->getRGBAPixels(), cinfo.output_scanline-1);
- else if (cinfo.out_color_components == 1)
- j_putGrayScanlineToRGB (buffer[0], cinfo.output_width, image->getRGBAPixels(), cinfo.output_scanline-1);
- }
-
- jpeg_finish_decompress (&cinfo);
- jpeg_destroy_decompress (&cinfo);
-
- return image;
-}
-
-Image* LoadJPG(ArchiveFile& file)
-{
- ScopedArchiveBuffer buffer(file);
- return LoadJPGBuff_(buffer.buffer, static_cast<int>(buffer.length));
-}
-
projects / voretournament / voretournament.git / blobdiff