1 /*
2 * Copyright (C)2011, 2015 D. R. Commander. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of the libjpeg-turbo Project nor the names of its
13 * contributors may be used to endorse or promote products derived from this
14 * software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <stdio.h>
30 #include <string.h>
31 #include <setjmp.h>
32 #include <errno.h>
33 #include "cdjpeg.h"
34 #include <jpeglib.h>
35 #include <jpegint.h>
36 #include "tjutil.h"
37 #include "bmp.h"
38
39
40 /* This duplicates the functionality of the VirtualGL bitmap library using
41 the components from cjpeg and djpeg */
42
43
44 /* Error handling (based on example in example.c) */
45
46 static char errStr[JMSG_LENGTH_MAX]="No error";
47
48 struct my_error_mgr
49 {
50 struct jpeg_error_mgr pub;
51 jmp_buf setjmp_buffer;
52 };
53 typedef struct my_error_mgr *my_error_ptr;
54
my_error_exit(j_common_ptr cinfo)55 static void my_error_exit(j_common_ptr cinfo)
56 {
57 my_error_ptr myerr=(my_error_ptr)cinfo->err;
58 (*cinfo->err->output_message)(cinfo);
59 longjmp(myerr->setjmp_buffer, 1);
60 }
61
62 /* Based on output_message() in jerror.c */
63
my_output_message(j_common_ptr cinfo)64 static void my_output_message(j_common_ptr cinfo)
65 {
66 (*cinfo->err->format_message)(cinfo, errStr);
67 }
68
69 #define _throw(m) {snprintf(errStr, JMSG_LENGTH_MAX, "%s", m); \
70 retval=-1; goto bailout;}
71 #define _throwunix(m) {snprintf(errStr, JMSG_LENGTH_MAX, "%s\n%s", m, \
72 strerror(errno)); retval=-1; goto bailout;}
73
74
pixelconvert(unsigned char * srcbuf,int srcpf,int srcbottomup,unsigned char * dstbuf,int dstpf,int dstbottomup,int w,int h)75 static void pixelconvert(unsigned char *srcbuf, int srcpf, int srcbottomup,
76 unsigned char *dstbuf, int dstpf, int dstbottomup, int w, int h)
77 {
78 unsigned char *srcrowptr=srcbuf, *srccolptr;
79 int srcps=tjPixelSize[srcpf];
80 int srcstride=srcbottomup? -w*srcps:w*srcps;
81 unsigned char *dstrowptr=dstbuf, *dstcolptr;
82 int dstps=tjPixelSize[dstpf];
83 int dststride=dstbottomup? -w*dstps:w*dstps;
84 int row, col;
85
86 if(srcbottomup) srcrowptr=&srcbuf[w*srcps*(h-1)];
87 if(dstbottomup) dstrowptr=&dstbuf[w*dstps*(h-1)];
88
89 /* NOTE: These quick & dirty CMYK<->RGB conversion routines are for testing
90 purposes only. Properly converting between CMYK and RGB requires a color
91 management system. */
92
93 if(dstpf==TJPF_CMYK)
94 {
95 for(row=0; row<h; row++, srcrowptr+=srcstride, dstrowptr+=dststride)
96 {
97 for(col=0, srccolptr=srcrowptr, dstcolptr=dstrowptr;
98 col<w; col++, srccolptr+=srcps)
99 {
100 double c=1.0-((double)(srccolptr[tjRedOffset[srcpf]])/255.);
101 double m=1.0-((double)(srccolptr[tjGreenOffset[srcpf]])/255.);
102 double y=1.0-((double)(srccolptr[tjBlueOffset[srcpf]])/255.);
103 double k=min(min(c,m),min(y,1.0));
104 if(k==1.0) c=m=y=0.0;
105 else
106 {
107 c=(c-k)/(1.0-k);
108 m=(m-k)/(1.0-k);
109 y=(y-k)/(1.0-k);
110 }
111 if(c>1.0) c=1.0;
112 if(c<0.) c=0.;
113 if(m>1.0) m=1.0;
114 if(m<0.) m=0.;
115 if(y>1.0) y=1.0;
116 if(y<0.) y=0.;
117 if(k>1.0) k=1.0;
118 if(k<0.) k=0.;
119 *dstcolptr++=(unsigned char)(255.0-c*255.0+0.5);
120 *dstcolptr++=(unsigned char)(255.0-m*255.0+0.5);
121 *dstcolptr++=(unsigned char)(255.0-y*255.0+0.5);
122 *dstcolptr++=(unsigned char)(255.0-k*255.0+0.5);
123 }
124 }
125 }
126 else if(srcpf==TJPF_CMYK)
127 {
128 for(row=0; row<h; row++, srcrowptr+=srcstride, dstrowptr+=dststride)
129 {
130 for(col=0, srccolptr=srcrowptr, dstcolptr=dstrowptr;
131 col<w; col++, dstcolptr+=dstps)
132 {
133 double c=(double)(*srccolptr++);
134 double m=(double)(*srccolptr++);
135 double y=(double)(*srccolptr++);
136 double k=(double)(*srccolptr++);
137 double r=c*k/255.;
138 double g=m*k/255.;
139 double b=y*k/255.;
140 if(r>255.0) r=255.0;
141 if(r<0.) r=0.;
142 if(g>255.0) g=255.0;
143 if(g<0.) g=0.;
144 if(b>255.0) b=255.0;
145 if(b<0.) b=0.;
146 dstcolptr[tjRedOffset[dstpf]]=(unsigned char)(r+0.5);
147 dstcolptr[tjGreenOffset[dstpf]]=(unsigned char)(g+0.5);
148 dstcolptr[tjBlueOffset[dstpf]]=(unsigned char)(b+0.5);
149 }
150 }
151 }
152 else
153 {
154 for(row=0; row<h; row++, srcrowptr+=srcstride, dstrowptr+=dststride)
155 {
156 for(col=0, srccolptr=srcrowptr, dstcolptr=dstrowptr;
157 col<w; col++, srccolptr+=srcps, dstcolptr+=dstps)
158 {
159 dstcolptr[tjRedOffset[dstpf]]=srccolptr[tjRedOffset[srcpf]];
160 dstcolptr[tjGreenOffset[dstpf]]=srccolptr[tjGreenOffset[srcpf]];
161 dstcolptr[tjBlueOffset[dstpf]]=srccolptr[tjBlueOffset[srcpf]];
162 }
163 }
164 }
165 }
166
167
loadbmp(char * filename,unsigned char ** buf,int * w,int * h,int dstpf,int bottomup)168 int loadbmp(char *filename, unsigned char **buf, int *w, int *h,
169 int dstpf, int bottomup)
170 {
171 int retval=0, dstps, srcpf, tempc;
172 struct jpeg_compress_struct cinfo;
173 struct my_error_mgr jerr;
174 cjpeg_source_ptr src;
175 FILE *file=NULL;
176
177 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
178
179 if(!filename || !buf || !w || !h || dstpf<0 || dstpf>=TJ_NUMPF)
180 _throw("loadbmp(): Invalid argument");
181
182 if((file=fopen(filename, "rb"))==NULL)
183 _throwunix("loadbmp(): Cannot open input file");
184
185 cinfo.err=jpeg_std_error(&jerr.pub);
186 jerr.pub.error_exit=my_error_exit;
187 jerr.pub.output_message=my_output_message;
188
189 if(setjmp(jerr.setjmp_buffer))
190 {
191 /* If we get here, the JPEG code has signaled an error. */
192 retval=-1; goto bailout;
193 }
194
195 jpeg_create_compress(&cinfo);
196 if((tempc=getc(file))<0 || ungetc(tempc, file)==EOF)
197 _throwunix("loadbmp(): Could not read input file")
198 else if(tempc==EOF) _throw("loadbmp(): Input file contains no data");
199
200 if(tempc=='B')
201 {
202 if((src=jinit_read_bmp(&cinfo))==NULL)
203 _throw("loadbmp(): Could not initialize bitmap loader");
204 }
205 else if(tempc=='P')
206 {
207 if((src=jinit_read_ppm(&cinfo))==NULL)
208 _throw("loadbmp(): Could not initialize bitmap loader");
209 }
210 else _throw("loadbmp(): Unsupported file type");
211
212 src->input_file=file;
213 (*src->start_input)(&cinfo, src);
214 (*cinfo.mem->realize_virt_arrays)((j_common_ptr)&cinfo);
215
216 *w=cinfo.image_width; *h=cinfo.image_height;
217
218 if(cinfo.input_components==1 && cinfo.in_color_space==JCS_RGB)
219 srcpf=TJPF_GRAY;
220 else srcpf=TJPF_RGB;
221
222 dstps=tjPixelSize[dstpf];
223 if((*buf=(unsigned char *)malloc((*w)*(*h)*dstps))==NULL)
224 _throw("loadbmp(): Memory allocation failure");
225
226 while(cinfo.next_scanline<cinfo.image_height)
227 {
228 int i, nlines=(*src->get_pixel_rows)(&cinfo, src);
229 for(i=0; i<nlines; i++)
230 {
231 unsigned char *outbuf; int row;
232 row=cinfo.next_scanline+i;
233 if(bottomup) outbuf=&(*buf)[((*h)-row-1)*(*w)*dstps];
234 else outbuf=&(*buf)[row*(*w)*dstps];
235 pixelconvert(src->buffer[i], srcpf, 0, outbuf, dstpf, bottomup, *w,
236 nlines);
237 }
238 cinfo.next_scanline+=nlines;
239 }
240
241 (*src->finish_input)(&cinfo, src);
242
243 bailout:
244 jpeg_destroy_compress(&cinfo);
245 if(file) fclose(file);
246 if(retval<0 && buf && *buf) {free(*buf); *buf=NULL;}
247 return retval;
248 }
249
250
savebmp(char * filename,unsigned char * buf,int w,int h,int srcpf,int bottomup)251 int savebmp(char *filename, unsigned char *buf, int w, int h, int srcpf,
252 int bottomup)
253 {
254 int retval=0, srcps, dstpf;
255 struct jpeg_decompress_struct dinfo;
256 struct my_error_mgr jerr;
257 djpeg_dest_ptr dst;
258 FILE *file=NULL;
259 char *ptr=NULL;
260
261 memset(&dinfo, 0, sizeof(struct jpeg_decompress_struct));
262
263 if(!filename || !buf || w<1 || h<1 || srcpf<0 || srcpf>=TJ_NUMPF)
264 _throw("savebmp(): Invalid argument");
265
266 if((file=fopen(filename, "wb"))==NULL)
267 _throwunix("savebmp(): Cannot open output file");
268
269 dinfo.err=jpeg_std_error(&jerr.pub);
270 jerr.pub.error_exit=my_error_exit;
271 jerr.pub.output_message=my_output_message;
272
273 if(setjmp(jerr.setjmp_buffer))
274 {
275 /* If we get here, the JPEG code has signaled an error. */
276 retval=-1; goto bailout;
277 }
278
279 jpeg_create_decompress(&dinfo);
280 if(srcpf==TJPF_GRAY)
281 {
282 dinfo.out_color_components=dinfo.output_components=1;
283 dinfo.out_color_space=JCS_GRAYSCALE;
284 }
285 else
286 {
287 dinfo.out_color_components=dinfo.output_components=3;
288 dinfo.out_color_space=JCS_RGB;
289 }
290 dinfo.image_width=w; dinfo.image_height=h;
291 dinfo.global_state=DSTATE_READY;
292 dinfo.scale_num=dinfo.scale_denom=1;
293
294 ptr=strrchr(filename, '.');
295 if(ptr && !strcasecmp(ptr, ".bmp"))
296 {
297 if((dst=jinit_write_bmp(&dinfo, 0))==NULL)
298 _throw("savebmp(): Could not initialize bitmap writer");
299 }
300 else
301 {
302 if((dst=jinit_write_ppm(&dinfo))==NULL)
303 _throw("savebmp(): Could not initialize PPM writer");
304 }
305
306 dst->output_file=file;
307 (*dst->start_output)(&dinfo, dst);
308 (*dinfo.mem->realize_virt_arrays)((j_common_ptr)&dinfo);
309
310 if(srcpf==TJPF_GRAY) dstpf=srcpf;
311 else dstpf=TJPF_RGB;
312 srcps=tjPixelSize[srcpf];
313
314 while(dinfo.output_scanline<dinfo.output_height)
315 {
316 int i, nlines=dst->buffer_height;
317 for(i=0; i<nlines; i++)
318 {
319 unsigned char *inbuf; int row;
320 row=dinfo.output_scanline+i;
321 if(bottomup) inbuf=&buf[(h-row-1)*w*srcps];
322 else inbuf=&buf[row*w*srcps];
323 pixelconvert(inbuf, srcpf, bottomup, dst->buffer[i], dstpf, 0, w,
324 nlines);
325 }
326 (*dst->put_pixel_rows)(&dinfo, dst, nlines);
327 dinfo.output_scanline+=nlines;
328 }
329
330 (*dst->finish_output)(&dinfo, dst);
331
332 bailout:
333 jpeg_destroy_decompress(&dinfo);
334 if(file) fclose(file);
335 return retval;
336 }
337
bmpgeterr(void)338 const char *bmpgeterr(void)
339 {
340 return errStr;
341 }
342