14 Image loader for raw files.
16 This is a barebones raw loader...
21 datachannels: the number of channels the file contains
22 storechannels: the bitmap of channels we will read
23 intrl: interlace flag,
24 0 = sample interleaving
26 2 = image interleaving (not implemented)
32 interleave(unsigned char *inbuffer,unsigned char *outbuffer,i_img_dim rowsize,int channels) {
36 if (inbuffer == outbuffer) return; /* Check if data is already in interleaved format */
37 for (ind=0; ind<rowsize; ind++)
38 for (ch=0; ch<channels; ch++)
39 outbuffer[i++] = inbuffer[rowsize*ch+ind];
44 expandchannels(unsigned char *inbuffer, unsigned char *outbuffer,
45 i_img_dim xsize, int datachannels, int storechannels) {
48 int copy_chans = storechannels > datachannels ? datachannels : storechannels;
49 if (inbuffer == outbuffer)
50 return; /* Check if data is already in expanded format */
51 for(x = 0; x < xsize; x++) {
52 for (ch = 0; ch < copy_chans; ch++)
53 outbuffer[x*storechannels+ch] = inbuffer[x*datachannels+ch];
54 for (; ch < storechannels; ch++)
55 outbuffer[x*storechannels+ch] = 0;
60 i_readraw_wiol(io_glue *ig, i_img_dim x, i_img_dim y, int datachannels, int storechannels, int intrl) {
65 unsigned char *inbuffer;
66 unsigned char *ilbuffer;
67 unsigned char *exbuffer;
69 size_t inbuflen,ilbuflen,exbuflen;
73 mm_log((1, "i_readraw(ig %p,x %" i_DF ",y %" i_DF ",datachannels %d,storechannels %d,intrl %d)\n",
74 ig, i_DFc(x), i_DFc(y), datachannels, storechannels, intrl));
76 if (intrl != 0 && intrl != 1) {
77 i_push_error(0, "raw_interleave must be 0 or 1");
80 if (storechannels < 1 || storechannels > 4) {
81 i_push_error(0, "raw_storechannels must be between 1 and 4");
85 im = i_img_empty_ch(NULL,x,y,storechannels);
89 inbuflen = im->xsize*datachannels;
91 exbuflen = im->xsize*storechannels;
92 inbuffer = (unsigned char*)mymalloc(inbuflen);
93 mm_log((1,"inbuflen: %ld, ilbuflen: %ld, exbuflen: %ld.\n",
94 (long)inbuflen, (long)ilbuflen, (long)exbuflen));
96 if (intrl==0) ilbuffer = inbuffer;
97 else ilbuffer=mymalloc(inbuflen);
99 if (datachannels==storechannels) exbuffer=ilbuffer;
100 else exbuffer= mymalloc(exbuflen);
103 while( k<im->ysize ) {
104 rc = i_io_read(ig, inbuffer, inbuflen);
105 if (rc != inbuflen) {
107 i_push_error(0, "error reading file");
109 i_push_error(0, "premature end of file");
112 if (intrl != 0) myfree(ilbuffer);
113 if (datachannels != storechannels) myfree(exbuffer);
116 interleave(inbuffer,ilbuffer,im->xsize,datachannels);
117 expandchannels(ilbuffer,exbuffer,im->xsize,datachannels,storechannels);
118 /* FIXME: Do we ever want to save to a virtual image? */
119 memcpy(&(im->idata[im->xsize*storechannels*k]),exbuffer,exbuflen);
124 if (intrl != 0) myfree(ilbuffer);
125 if (datachannels != storechannels) myfree(exbuffer);
127 i_tags_add(&im->tags, "i_format", 0, "raw", -1, 0);
135 i_writeraw_wiol(i_img* im, io_glue *ig) {
139 mm_log((1,"writeraw(im %p,ig %p)\n", im, ig));
141 if (im == NULL) { mm_log((1,"Image is empty\n")); return(0); }
143 rc = i_io_write(ig,im->idata,im->bytes);
144 if (rc != im->bytes) {
145 i_push_error(errno, "Could not write to file");
146 mm_log((1,"i_writeraw: Couldn't write to file\n"));
150 if (im->type == i_direct_type) {
151 /* just save it as 8-bits, maybe support saving higher bit count
153 size_t line_size = im->xsize * im->channels;
154 unsigned char *data = mymalloc(line_size);
158 while (rc == line_size && y < im->ysize) {
159 i_gsamp(im, 0, im->xsize, y, data, NULL, im->channels);
160 rc = i_io_write(ig, data, line_size);
163 if (rc != line_size) {
164 i_push_error(errno, "write error");
169 /* paletted image - assumes the caller puts the palette somewhere
172 size_t line_size = sizeof(i_palidx) * im->xsize;
173 i_palidx *data = mymalloc(sizeof(i_palidx) * im->xsize);
177 while (rc == line_size && y < im->ysize) {
178 i_gpal(im, 0, im->xsize, y, data);
179 rc = i_io_write(ig, data, line_size);
183 if (rc != line_size) {
184 i_push_error(errno, "write error");