forked from old/legacy-imlib2
Fixed start-of-line HAM problem.
Added SHAM and CTBL load. Added greyscale load. Added IMLIB2_LBM_NOMASK check to disable masking. Added colour gun scaling, e.g. 4-bit 0x0f scales to 8-bit 0xff, not 0xf0. Changed RLE decompression by scanline instead of by byte. Removed empty save() function altogether as per some other loaders. SVN revision: 11426
This commit is contained in:
John Bickers
parent
36a66790e5
commit
d638adad64
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@ -1,9 +1,14 @@
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/*------------------------------------------------------------------------------
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* Reads regular Amiga IFF ILBM files. Does not handle sliced HAM, etc.
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* Reads regular Amiga IFF ILBM files.
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*
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* Supports IMLIB2_LBM_NOMASK environment variable. If this is set to "1", then
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* a transparency mask in an image will be ignored. On the Amiga a mask is often
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* applied only when loading a brush rather than a picture, but this loader has
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* no way to tell when the user wants this behaviour from the picture alone.
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*
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* Author: John Bickers <jbickers@ihug.co.nz>
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* Since: 2004-08-21
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* Version: 2004-08-23
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* Version: 2004-08-28
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*------------------------------------------------------------------------------*/
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#ifdef HAVE_CONFIG_H
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@ -13,453 +18,444 @@
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#include "common.h"
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#include "image.h"
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char load(ImlibImage * im, ImlibProgressFunction progress,
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char progress_granularity, char immediate_load);
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char save(ImlibImage * im, ImlibProgressFunction progress,
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char progress_granularity);
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void formats(ImlibLoader * l);
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char load(ImlibImage *im, ImlibProgressFunction progress, char progress_granularity, char immediate_load);
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#if 0
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char save(ImlibImage *im, ImlibProgressFunction progress, char progress_granularity);
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#endif
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void formats(ImlibLoader *l);
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#define L2RLONG(a) ((((long)((a)[0]) & 0xff) << 24) + (((long)((a)[1]) & 0xff) << 16) + (((long)((a)[2]) & 0xff) << 8) + ((long)((a)[3]) & 0xff))
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#define L2RWORD(a) ((((long)((a)[0]) & 0xff) << 8) + ((long)((a)[1]) & 0xff))
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typedef struct CHUNK {
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long size;
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unsigned char *data;
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long size;
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unsigned char *data;
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} CHUNK;
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typedef struct BODY {
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long size;
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unsigned char *data;
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int offset;
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int count;
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int rle;
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int rletype;
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} BODY;
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typedef struct ILBM {
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CHUNK bmhd;
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CHUNK camg;
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CHUNK cmap;
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CHUNK ctbl;
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CHUNK sham;
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CHUNK body;
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int depth;
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int mask;
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int ham;
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int hbrite;
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int row;
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int offset;
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int count;
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int rle;
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} ILBM;
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static void freeilbm(ILBM *);
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static int loadchunks(char *, ILBM *, int);
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static void bodyrow(unsigned char *, int, ILBM *);
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static unsigned char scalegun(unsigned char, int);
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static void scalecmap(ILBM *);
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static void deplane(DATA32 *, int, ILBM *, unsigned char **);
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/*------------------------------------------------------------------------------
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* Frees memory allocated as part of an ILBM structure.
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*------------------------------------------------------------------------------*/
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static void freeilbm(ILBM *ilbm)
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{
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if (ilbm->bmhd.data) free(ilbm->bmhd.data);
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if (ilbm->camg.data) free(ilbm->camg.data);
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if (ilbm->cmap.data) free(ilbm->cmap.data);
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if (ilbm->ctbl.data) free(ilbm->ctbl.data);
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if (ilbm->sham.data) free(ilbm->sham.data);
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if (ilbm->body.data) free(ilbm->body.data);
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memset(ilbm, 0, sizeof(*ilbm));
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}
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static int loadchunks(char *name, CHUNK * bmhd, CHUNK * camg,
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CHUNK * cmap, BODY * body);
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static unsigned char bodybyte(BODY *);
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static void deplane(DATA32 * row, int w, CHUNK * bmhd, CHUNK * cmap,
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unsigned char *plane[], int depth, int mask,
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int ham, int hbrite);
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/*------------------------------------------------------------------------------
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* Reads the given chunks out of a file, returns 0 if the file had a problem.
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*
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* Format FORMsizeILBMBMHDsize....CAMGsize....CMAPsize....BODYsize....
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* Format FORMsizeILBMtag.size....tag.size....tag.size....
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*------------------------------------------------------------------------------*/
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static int
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loadchunks(char *name, CHUNK * bmhd, CHUNK * camg, CHUNK * cmap, BODY * body)
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static int loadchunks(char *name, ILBM *ilbm, int full)
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{
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FILE *f;
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size_t s;
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long formsize, pos, z;
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int ok, seek;
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char buf[12];
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CHUNK *c;
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FILE *f;
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size_t s;
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long formsize, pos, z;
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int ok, seek;
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char buf[12];
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if (bmhd)
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{
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bmhd->size = 0;
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bmhd->data = NULL;
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}
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if (camg)
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{
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camg->size = 0;
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camg->data = NULL;
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}
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if (cmap)
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{
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cmap->size = 0;
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cmap->data = NULL;
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}
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if (body)
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{
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body->size = 0;
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body->data = NULL;
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}
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ok = 0;
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ok = 0;
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f = fopen(name, "rb");
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if (f)
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{
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f = fopen(name, "rb");
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if (f) {
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s = fread(buf, 1, 12, f);
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if (s == 12 && !memcmp(buf, "FORM", 4) && !memcmp(buf + 8, "ILBM", 4))
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{
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formsize = L2RLONG(buf + 4);
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if (s == 12 && !memcmp(buf, "FORM", 4) && !memcmp(buf + 8, "ILBM", 4)) {
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memset(ilbm, 0, sizeof(*ilbm));
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formsize = L2RLONG(buf + 4);
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while (1)
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{
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pos = ftell(f);
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if (pos < 0 || pos >= formsize + 8)
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break; /* Error or FORM data is finished. */
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seek = 1;
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while (1) {
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pos = ftell(f);
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if (pos < 0 || pos >= formsize + 8) break; /* Error or FORM data is finished. */
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seek = 1;
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s = fread(buf, 1, 8, f);
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if (s != 8)
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break; /* Error or short file. */
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s = fread(buf, 1, 8, f);
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if (s != 8) break; /* Error or short file. */
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z = L2RLONG(buf + 4);
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if (z < 0)
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break; /* Corrupt file. */
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z = L2RLONG(buf + 4);
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if (z < 0) break; /* Corrupt file. */
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if (!memcmp(buf, "BMHD", 4) && bmhd && !bmhd->data)
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{
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bmhd->size = z;
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bmhd->data = malloc(bmhd->size);
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if (!bmhd->data)
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break;
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c = NULL;
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if (!memcmp(buf, "BMHD", 4)) c = &(ilbm->bmhd);
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else if (full) {
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if (!memcmp(buf, "CAMG", 4)) c = &(ilbm->camg);
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else if (!memcmp(buf, "CMAP", 4)) c = &(ilbm->cmap);
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else if (!memcmp(buf, "CTBL", 4)) c = &(ilbm->ctbl);
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else if (!memcmp(buf, "SHAM", 4)) c = &(ilbm->sham);
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else if (!memcmp(buf, "BODY", 4)) c = &(ilbm->body);
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}
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s = fread(bmhd->data, 1, bmhd->size, f);
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if (s != bmhd->size)
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break; /* Error or short file. */
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if (c && !c->data) {
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c->size = z;
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c->data = malloc(c->size);
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if (!c->data) break; /* Out of memory. */
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if (!cmap && !camg && !body)
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{
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ok = 1;
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break;
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}
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s = fread(c->data, 1, c->size, f);
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if (s != c->size) break; /* Error or short file. */
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seek = 0;
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seek = 0;
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if (!full) { /* Only BMHD required. */
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ok = 1;
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break;
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}
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}
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if (!memcmp(buf, "CAMG", 4) && camg && !camg->data)
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{
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camg->size = z;
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camg->data = malloc(camg->size);
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if (!camg->data)
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break;
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if (pos + 8 + z >= formsize + 8) break; /* This was last chunk. */
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s = fread(camg->data, 1, camg->size, f);
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if (s != camg->size)
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break;
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if (seek && fseek(f, z, SEEK_CUR) != 0) break;
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}
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seek = 0;
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}
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if (!memcmp(buf, "CMAP", 4) && cmap && !cmap->data)
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{
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cmap->size = z;
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cmap->data = malloc(cmap->size);
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if (!cmap->data)
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break;
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s = fread(cmap->data, 1, cmap->size, f);
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if (s != cmap->size)
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break;
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seek = 0;
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}
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if (!memcmp(buf, "BODY", 4) && body && !body->data)
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{
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body->size = z;
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body->data = malloc(body->size);
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if (!body->data)
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break;
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s = fread(body->data, 1, body->size, f);
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if (s != body->size)
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break;
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if (bmhd && bmhd->data)
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{ /* BMHD must be before BODY. */
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ok = 1;
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break;
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}
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seek = 0;
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}
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if (pos + 8 + z >= formsize + 8)
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break; /* This was last chunk. */
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if (seek && fseek(f, z, SEEK_CUR) != 0)
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break;
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}
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}
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/* File may end strangely, especially if body size is uneven, but it's
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* ok if we have the chunks we want. !full check is already done. */
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if (ilbm->bmhd.data && ilbm->body.data) ok = 1;
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if (!ok) freeilbm(ilbm);
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}
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fclose(f);
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}
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}
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if (!ok)
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{
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if (bmhd && bmhd->data)
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free(bmhd->data);
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if (camg && camg->data)
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free(camg->data);
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if (cmap && cmap->data)
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free(cmap->data);
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if (body && body->data)
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free(body->data);
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}
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return ok;
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return ok;
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}
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/*------------------------------------------------------------------------------
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* Returns a byte of data from a BODY chunk.
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* Unpacks a row of possibly RLE data at a time.
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*
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* RLE compression depends on a count byte, followed by data bytes.
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*
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* 0x80 means skip.
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* 0xff to 0x81 means repeat one data byte (256 - count) + 1 times.
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* 0x00 to 0x7f means copy count + 1 data bytes.
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*
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* In theory RLE compression is not supposed to create runs across scanlines.
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*------------------------------------------------------------------------------*/
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static unsigned char
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bodybyte(BODY * body)
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static void bodyrow(unsigned char *p, int z, ILBM *ilbm)
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{
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unsigned char b;
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int i, x, w;
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unsigned char b;
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if (body->offset >= body->size)
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return 0;
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if (ilbm->offset >= ilbm->body.size) {
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memset(p, 0, z);
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return;
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}
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if (body->rle)
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{
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if (body->count == 0)
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{
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b = body->data[body->offset++];
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while (b == 0x80 && body->offset < body->size)
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b = body->data[body->offset++];
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if (!ilbm->rle) {
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w = ilbm->body.size - ilbm->offset;
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if (w > z) w = z;
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memcpy(p, ilbm->body.data + ilbm->offset, w);
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if (w < z) memset(p + w, 0, z - w);
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ilbm->offset += w;
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return;
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}
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body->rletype = (b & 0x80);
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if (body->rletype)
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body->count = (0x100 - b) + 1;
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else
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body->count = (b & 0x7f) + 1;
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for (i = 0; i < z; ) {
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b = ilbm->body.data[ilbm->offset++];
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while (b == 0x80 && ilbm->offset < ilbm->body.size) b = ilbm->body.data[ilbm->offset++];
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if (ilbm->offset >= ilbm->body.size) break;
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if (body->offset >= body->size)
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return 0;
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}
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body->count--;
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if (body->rletype)
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{
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if (body->count == 0)
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return body->data[body->offset++];
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return body->data[body->offset];
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}
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return body->data[body->offset++];
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}
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return body->data[body->offset++];
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if (b & 0x80) {
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w = (0x100 - b) + 1;
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if (w > z - i) w = z - i;
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b = ilbm->body.data[ilbm->offset++];
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memset(p + i, b, w);
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i += w;
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}
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else {
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w = (b & 0x7f) + 1;
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if (w > ilbm->body.size - ilbm->offset) w = ilbm->body.size - ilbm->offset;
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x = (w <= z - i)? w: z - i;
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memcpy(p + i, ilbm->body.data + ilbm->offset, x);
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i += x;
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ilbm->offset += w;
|
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}
|
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}
|
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|
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if (i < z) memset(p, 0, z - i);
|
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}
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||||
|
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|
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/*------------------------------------------------------------------------------
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* Shifts a value to produce an 8-bit colour gun, and fills in the lower bits
|
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* from the high bits of the value so that, for example, 4-bit 0x0f scales to
|
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* 0xff, or 1-bit 0x01 scales to 0xff.
|
||||
*------------------------------------------------------------------------------*/
|
||||
static unsigned char scalegun(unsigned char v, int sl)
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{
|
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int sr;
|
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|
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switch (sl) {
|
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case 1:
|
||||
case 2:
|
||||
case 3:
|
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sr = 8 - sl;
|
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return (v << sl) | (v >> sr);
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|
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case 4:
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return (v << 4) | v;
|
||||
|
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case 5:
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return v * 0x24;
|
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|
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case 6:
|
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return v * 0x55;
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||||
|
||||
case 7:
|
||||
return v * 0xff;
|
||||
}
|
||||
return v;
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------------------------------
|
||||
* Scales the colours in a CMAP chunk if they all look like 4-bit colour, so
|
||||
* that they use all 8-bits. This is done by copying the high nybble into the
|
||||
* low nybble, so for example 0xf0 becomes 0xff.
|
||||
*------------------------------------------------------------------------------*/
|
||||
static void scalecmap(ILBM *ilbm)
|
||||
{
|
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int i;
|
||||
|
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if (!ilbm->cmap.data) return;
|
||||
|
||||
for (i = 0; i < ilbm->cmap.size; i++)
|
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if (ilbm->cmap.data[i] & 0x0f) return;
|
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|
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for (i = 0; i < ilbm->cmap.size; i++)
|
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ilbm->cmap.data[i] |= ilbm->cmap.data[i] >> 4;
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------------------------------
|
||||
* Deplanes and converts an array of bitplanes to a single scanline of DATA32
|
||||
* (unsigned int) values. DATA32 is ARGB.
|
||||
*------------------------------------------------------------------------------*/
|
||||
static void
|
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deplane(DATA32 * row, int w, CHUNK * bmhd, CHUNK * cmap, unsigned char *plane[],
|
||||
int depth, int mask, int ham, int hbrite)
|
||||
static void deplane(DATA32 *row, int w, ILBM *ilbm, unsigned char *plane[])
|
||||
{
|
||||
unsigned long l;
|
||||
int i, o, x;
|
||||
unsigned char bit, r, g, b, a, v, h;
|
||||
unsigned long l;
|
||||
int i, o, sl, x;
|
||||
unsigned char bit, r, g, b, a, v, h, *pal;
|
||||
|
||||
bit = 0x80;
|
||||
o = 0;
|
||||
for (x = 0; x < w; x++)
|
||||
{
|
||||
pal = NULL;
|
||||
if (ilbm->sham.data && ilbm->sham.size >= 2 + (ilbm->row + 1) * 2 * 16)
|
||||
pal = ilbm->sham.data + 2 + ilbm->row * 2 * 16;
|
||||
if (ilbm->ctbl.data && ilbm->ctbl.size >= (ilbm->row + 1) * 2 * 16)
|
||||
pal = ilbm->ctbl.data + ilbm->row * 2 * 16;
|
||||
|
||||
if (ilbm->ham) r = g = b = 0;
|
||||
|
||||
bit = 0x80;
|
||||
o = 0;
|
||||
for (x = 0; x < w; x++) {
|
||||
l = 0;
|
||||
for (i = depth - 1; i >= 0; i--)
|
||||
{
|
||||
l = l << 1;
|
||||
if (plane[i][o] & bit)
|
||||
l = l | 1;
|
||||
}
|
||||
a = (mask == 0 || (mask == 1 && (plane[depth][o] & bit))
|
||||
|| mask == 2) ? 0xff : 0x00;
|
||||
for (i = ilbm->depth - 1; i >= 0; i--) {
|
||||
l = l << 1;
|
||||
if (plane[i][o] & bit) l = l | 1;
|
||||
}
|
||||
a = (ilbm->mask == 0 || (ilbm->mask == 1 && (plane[ilbm->depth][o] & bit)) || ilbm->mask == 2)? 0xff: 0x00;
|
||||
|
||||
if (depth == 32)
|
||||
{
|
||||
a = (l >> 24) & 0xff;
|
||||
b = (l >> 16) & 0xff;
|
||||
g = (l >> 8) & 0xff;
|
||||
r = l & 0xff;
|
||||
}
|
||||
else if (depth == 24)
|
||||
{
|
||||
b = (l >> 16) & 0xff;
|
||||
g = (l >> 8) & 0xff;
|
||||
r = l & 0xff;
|
||||
}
|
||||
else if (ham)
|
||||
{
|
||||
v = l & ((1 << (depth - 2)) - 1);
|
||||
h = (l & ~v) >> (depth - 2);
|
||||
if (ilbm->depth == 32) {
|
||||
a = (l >> 24) & 0xff;
|
||||
b = (l >> 16) & 0xff;
|
||||
g = (l >> 8) & 0xff;
|
||||
r = l & 0xff;
|
||||
}
|
||||
else if (ilbm->depth == 24) {
|
||||
b = (l >> 16) & 0xff;
|
||||
g = (l >> 8) & 0xff;
|
||||
r = l & 0xff;
|
||||
}
|
||||
else if (ilbm->ham) {
|
||||
v = l & ((1 << (ilbm->depth - 2)) - 1);
|
||||
h = (l & ~v) >> (ilbm->depth - 2);
|
||||
|
||||
if (x == 0 || h == 0x00)
|
||||
{
|
||||
r = cmap->data[v * 3];
|
||||
g = cmap->data[v * 3 + 1];
|
||||
b = cmap->data[v * 3 + 2];
|
||||
}
|
||||
else if (h == 0x01)
|
||||
{
|
||||
b = v << (8 - (depth - 2));
|
||||
}
|
||||
else if (h == 0x02)
|
||||
{
|
||||
r = v << (8 - (depth - 2));
|
||||
}
|
||||
else if (h == 0x03)
|
||||
{
|
||||
g = v << (8 - (depth - 2));
|
||||
}
|
||||
}
|
||||
else if (hbrite)
|
||||
{
|
||||
v = l & ((1 << (depth - 1)) - 1);
|
||||
h = (l & ~v) >> (depth - 1);
|
||||
if (h == 0x00) {
|
||||
if (!pal) {
|
||||
if ((v + 1) * 3 <= ilbm->cmap.size) {
|
||||
r = ilbm->cmap.data[v * 3];
|
||||
g = ilbm->cmap.data[v * 3 + 1];
|
||||
b = ilbm->cmap.data[v * 3 + 2];
|
||||
}
|
||||
else r = g = b = 0;
|
||||
}
|
||||
else {
|
||||
r = scalegun(pal[v * 2] & 0x0f, 4);
|
||||
g = scalegun((pal[v * 2 + 1] & 0xf0) >> 4, 4);
|
||||
b = scalegun((pal[v * 2 + 1] & 0x0f), 4);
|
||||
}
|
||||
}
|
||||
else if (h == 0x01) b = scalegun(v, 8 - (ilbm->depth - 2));
|
||||
else if (h == 0x02) r = scalegun(v, 8 - (ilbm->depth - 2));
|
||||
else g = scalegun(v, 8 - (ilbm->depth - 2));
|
||||
}
|
||||
else if (ilbm->hbrite) {
|
||||
v = l & ((1 << (ilbm->depth - 1)) - 1);
|
||||
h = (l & ~v) >> (ilbm->depth - 1);
|
||||
|
||||
r = cmap->data[v * 3];
|
||||
g = cmap->data[v * 3 + 1];
|
||||
b = cmap->data[v * 3 + 2];
|
||||
if (!pal) {
|
||||
if ((v + 1) * 3 <= ilbm->cmap.size) {
|
||||
r = ilbm->cmap.data[v * 3];
|
||||
g = ilbm->cmap.data[v * 3 + 1];
|
||||
b = ilbm->cmap.data[v * 3 + 2];
|
||||
}
|
||||
else r = g = b = 0;
|
||||
}
|
||||
else {
|
||||
r = scalegun(pal[v * 2] & 0x0f, 4);
|
||||
g = scalegun((pal[v * 2 + 1] & 0xf0) >> 4, 4);
|
||||
b = scalegun((pal[v * 2 + 1] & 0x0f), 4);
|
||||
}
|
||||
|
||||
if (h)
|
||||
{
|
||||
r = r >> 1;
|
||||
g = g >> 1;
|
||||
b = b >> 1;
|
||||
}
|
||||
if (h) {
|
||||
r = r >> 1;
|
||||
g = g >> 1;
|
||||
b = b >> 1;
|
||||
}
|
||||
|
||||
if (mask == 2 && v == L2RWORD(bmhd->data + 12))
|
||||
a = 0x00;
|
||||
}
|
||||
else
|
||||
{
|
||||
v = l & 0xff;
|
||||
if ((v + 1) * 3 <= cmap->size)
|
||||
{
|
||||
r = cmap->data[v * 3];
|
||||
g = cmap->data[v * 3 + 1];
|
||||
b = cmap->data[v * 3 + 2];
|
||||
}
|
||||
else
|
||||
r = g = b = 0;
|
||||
if (ilbm->mask == 2 && v == L2RWORD(ilbm->bmhd.data + 12)) a = 0x00;
|
||||
}
|
||||
else if (ilbm->cmap.size == 0 && !pal) {
|
||||
v = l & ((1 << ilbm->depth) - 1);
|
||||
r = scalegun(v, ilbm->depth);
|
||||
g = r;
|
||||
b = r;
|
||||
}
|
||||
else {
|
||||
v = l & 0xff;
|
||||
if (!pal) {
|
||||
if ((v + 1) * 3 <= ilbm->cmap.size) {
|
||||
r = ilbm->cmap.data[v * 3];
|
||||
g = ilbm->cmap.data[v * 3 + 1];
|
||||
b = ilbm->cmap.data[v * 3 + 2];
|
||||
}
|
||||
else r = g = b = 0;
|
||||
}
|
||||
else {
|
||||
r = scalegun(pal[v * 2] & 0x0f, 4);
|
||||
g = scalegun((pal[v * 2 + 1] & 0xf0) >> 4, 4);
|
||||
b = scalegun((pal[v * 2 + 1] & 0x0f), 4);
|
||||
}
|
||||
|
||||
if (mask == 2 && v == L2RWORD(bmhd->data + 12))
|
||||
a = 0x00;
|
||||
}
|
||||
if (ilbm->mask == 2 && v == L2RWORD(ilbm->bmhd.data + 12)) a = 0x00;
|
||||
}
|
||||
|
||||
row[x] =
|
||||
((unsigned long)a << 24) | ((unsigned long)r << 16) |
|
||||
((unsigned long)g << 8) | (unsigned long)b;
|
||||
row[x] = ((unsigned long)a << 24) | ((unsigned long)r << 16) | ((unsigned long)g << 8) | (unsigned long)b;
|
||||
|
||||
bit = bit >> 1;
|
||||
if (bit == 0)
|
||||
{
|
||||
o++;
|
||||
bit = 0x80;
|
||||
}
|
||||
}
|
||||
if (bit == 0) {
|
||||
o++;
|
||||
bit = 0x80;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------------------------------
|
||||
* Loads an image. If im->loader is non-zero, or immediate_load is non-zero, or
|
||||
* progress is non-zero, then the file is fully loaded, otherwise only the width
|
||||
* and height are read.
|
||||
*
|
||||
* Uses BMHD, CAMG, CMAP, and BODY chunks. Ignores others, e.g. DPI_ or ANNO.
|
||||
* Imlib2 doesn't support reading comment chunks like ANNO.
|
||||
*------------------------------------------------------------------------------*/
|
||||
char
|
||||
load(ImlibImage * im, ImlibProgressFunction progress, char progress_granularity,
|
||||
char immediate_load)
|
||||
char load(ImlibImage *im, ImlibProgressFunction progress, char progress_granularity, char immediate_load)
|
||||
{
|
||||
int cancel, full, ham, hbrite, i, j, k, mask, n, rle, ok,
|
||||
planes, y, z, prevy;
|
||||
unsigned char *plane[40];
|
||||
char per, pper;
|
||||
BODY body;
|
||||
CHUNK bmhd, camg, cmap;
|
||||
char *env;
|
||||
int cancel, full, i, j, k, n, ok, y, z, gran, nexty, prevy;
|
||||
unsigned char *plane[40];
|
||||
ILBM ilbm;
|
||||
|
||||
/*----------
|
||||
* Do nothing if the data is already loaded.
|
||||
*----------*/
|
||||
if (im->data)
|
||||
return 0;
|
||||
if (im->data) return 0;
|
||||
|
||||
/*----------
|
||||
* Load the chunk(s) we're interested in. If full is not true, then
|
||||
* we only want the image size and format.
|
||||
* Load the chunk(s) we're interested in. If full is not true, then we only
|
||||
* want the image size and format.
|
||||
*----------*/
|
||||
full = (im->loader || immediate_load || progress);
|
||||
if (full)
|
||||
ok = loadchunks(im->real_file, &bmhd, &camg, &cmap, &body);
|
||||
else
|
||||
ok = loadchunks(im->real_file, &bmhd, NULL, NULL, NULL);
|
||||
if (!ok)
|
||||
return 0;
|
||||
full = (im->loader || immediate_load || progress);
|
||||
ok = loadchunks(im->real_file, &ilbm, full);
|
||||
if (!ok) return 0;
|
||||
|
||||
/*----------
|
||||
* Use and check header.
|
||||
*----------*/
|
||||
ok = 0;
|
||||
if (bmhd.size >= 20)
|
||||
{
|
||||
ok = 0;
|
||||
if (ilbm.bmhd.size >= 20) {
|
||||
ok = 1;
|
||||
|
||||
im->w = L2RWORD(bmhd.data);
|
||||
im->h = L2RWORD(bmhd.data + 2);
|
||||
im->w = L2RWORD(ilbm.bmhd.data);
|
||||
im->h = L2RWORD(ilbm.bmhd.data + 2);
|
||||
if (im->w <= 0 || im->h <= 0) ok = 0;
|
||||
|
||||
planes = bmhd.data[8];
|
||||
if (planes < 1 || (planes > 8 && planes != 24 && planes != 32))
|
||||
ok = 0; /* Only 1 to 8, 24, or 32 planes. */
|
||||
ilbm.depth = ilbm.bmhd.data[8];
|
||||
if (ilbm.depth < 1 || (ilbm.depth > 8 && ilbm.depth != 24 && ilbm.depth != 32)) ok = 0; /* Only 1 to 8, 24, or 32 planes. */
|
||||
|
||||
if (bmhd.data[10] > 1)
|
||||
ok = 0; /* Only NONE or RLE compression. */
|
||||
rle = bmhd.data[10];
|
||||
ilbm.rle = ilbm.bmhd.data[10];
|
||||
if (ilbm.rle < 0 || ilbm.rle > 1) ok = 0; /* Only NONE or RLE compression. */
|
||||
|
||||
mask = bmhd.data[9];
|
||||
ilbm.mask = ilbm.bmhd.data[9];
|
||||
|
||||
if (mask || planes == 32)
|
||||
SET_FLAG(im->flags, F_HAS_ALPHA);
|
||||
else
|
||||
UNSET_FLAG(im->flags, F_HAS_ALPHA);
|
||||
if (ilbm.mask || ilbm.depth == 32) SET_FLAG(im->flags, F_HAS_ALPHA);
|
||||
else UNSET_FLAG(im->flags, F_HAS_ALPHA);
|
||||
|
||||
if (!im->format)
|
||||
im->format = strdup("lbm");
|
||||
env = getenv("IMLIB2_LBM_NOMASK");
|
||||
if (env && (!strcmp(env, "true") || !strcmp(env, "1") || !strcmp(env, "yes") || !strcmp(env, "on"))) UNSET_FLAG(im->flags, F_HAS_ALPHA);
|
||||
|
||||
ham = 0;
|
||||
hbrite = 0;
|
||||
if (planes <= 8)
|
||||
{
|
||||
if (camg.size == 4)
|
||||
{
|
||||
if (camg.data[2] & 0x08)
|
||||
ham = 1;
|
||||
if (camg.data[3] & 0x80)
|
||||
hbrite = 1;
|
||||
if (!im->format) im->format = strdup("lbm");
|
||||
|
||||
if (ham && full
|
||||
&& (planes < 6 || cmap.size < 3 * (1 << (planes - 2))))
|
||||
ham = 0;
|
||||
if (hbrite && full
|
||||
&& (planes < 5 || cmap.size < 3 * (1 << (planes - 1))))
|
||||
hbrite = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (planes == 6 && full && cmap.size >= 3 * 16)
|
||||
ham = 1;
|
||||
if (full && !ham && planes > 1
|
||||
&& cmap.size == 3 * (1 << (planes - 1)))
|
||||
hbrite = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!full || !ok)
|
||||
{
|
||||
free(bmhd.data);
|
||||
if (full && camg.data)
|
||||
free(camg.data);
|
||||
if (full && cmap.data)
|
||||
free(cmap.data);
|
||||
if (full && body.data)
|
||||
free(body.data);
|
||||
ilbm.ham = 0;
|
||||
ilbm.hbrite = 0;
|
||||
if (ilbm.depth <= 8) {
|
||||
if (ilbm.camg.size == 4) {
|
||||
if (ilbm.camg.data[2] & 0x08) ilbm.ham = 1;
|
||||
if (ilbm.camg.data[3] & 0x80) ilbm.hbrite = 1;
|
||||
}
|
||||
else { /* Only guess at ham and hbrite if CMAP is present. */
|
||||
if (ilbm.depth == 6 && full && ilbm.cmap.size >= 3 * 16) ilbm.ham = 1;
|
||||
if (full && !ilbm.ham && ilbm.depth > 1 && ilbm.cmap.size == 3 * (1 << (ilbm.depth - 1))) ilbm.hbrite = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!full || !ok) {
|
||||
freeilbm(&ilbm);
|
||||
return ok;
|
||||
}
|
||||
}
|
||||
|
||||
/*----------
|
||||
* The source data is planar. Each plane is an even number of bytes wide. If
|
||||
|
|
@ -467,104 +463,88 @@ load(ImlibImage * im, ImlibProgressFunction progress, char progress_granularity,
|
|||
* from each plane are interleaved, from top to bottom. The first plane is the
|
||||
* 0 bit.
|
||||
*----------*/
|
||||
ok = 0;
|
||||
cancel = 0;
|
||||
plane[0] = NULL;
|
||||
ok = 0;
|
||||
cancel = 0;
|
||||
plane[0] = NULL;
|
||||
|
||||
im->data = malloc(im->w * im->h * sizeof(DATA32));
|
||||
if (im->data)
|
||||
{
|
||||
body.offset = 0;
|
||||
body.count = 0;
|
||||
body.rle = rle;
|
||||
body.rletype = 0;
|
||||
|
||||
n = planes;
|
||||
if (mask == 1)
|
||||
n++;
|
||||
im->data = malloc(im->w * im->h * sizeof(DATA32));
|
||||
if (im->data) {
|
||||
n = ilbm.depth;
|
||||
if (ilbm.mask == 1) n++;
|
||||
|
||||
plane[0] = malloc(((im->w + 15) / 16) * 2 * n);
|
||||
for (i = 1; i < n; i++)
|
||||
plane[i] = plane[i - 1] + ((im->w + 15) / 16) * 2;
|
||||
for (i = 1; i < n; i++) plane[i] = plane[i - 1] + ((im->w + 15) / 16) * 2;
|
||||
|
||||
z = ((im->w + 15) / 16) * 2 * n;
|
||||
|
||||
pper = 0;
|
||||
prevy = 0;
|
||||
if (progress) {
|
||||
prevy = 0;
|
||||
if (progress_granularity <= 0) progress_granularity = 1;
|
||||
gran = progress_granularity;
|
||||
nexty = ((im->h * gran) / 100);
|
||||
}
|
||||
|
||||
for (y = 0; y < im->h; y++)
|
||||
{
|
||||
for (i = 0; i < z; i++)
|
||||
plane[0][i] = bodybyte(&body);
|
||||
scalecmap(&ilbm);
|
||||
|
||||
deplane(im->data + im->w * y, im->w, &bmhd, &cmap, plane, planes,
|
||||
mask, ham, hbrite);
|
||||
for (y = 0; y < im->h; y++) {
|
||||
bodyrow(plane[0], z, &ilbm);
|
||||
|
||||
if (progress)
|
||||
{
|
||||
per = (char)((100 * y) / im->h);
|
||||
if (per - pper >= progress_granularity || y == im->h - 1)
|
||||
{
|
||||
if (!progress(im, per, 0, prevy, im->w, y + 1))
|
||||
{
|
||||
cancel = 1;
|
||||
break;
|
||||
}
|
||||
pper = per;
|
||||
prevy = y;
|
||||
}
|
||||
}
|
||||
}
|
||||
deplane(im->data + im->w * y, im->w, &ilbm, plane);
|
||||
ilbm.row++;
|
||||
|
||||
if (progress && (y >= nexty || y == im->h - 1)) {
|
||||
if (!progress(im, (char)((100 * (y + 1)) / im->h), 0, prevy, im->w, y + 1)) {
|
||||
cancel = 1;
|
||||
break;
|
||||
}
|
||||
prevy = y;
|
||||
gran += progress_granularity;
|
||||
nexty = ((im->h * gran) / 100);
|
||||
}
|
||||
}
|
||||
|
||||
ok = !cancel;
|
||||
}
|
||||
}
|
||||
|
||||
/*----------
|
||||
* We either had a successful decode, the user cancelled, or we couldn't get
|
||||
* the memory for im->data.
|
||||
*----------*/
|
||||
if (!ok)
|
||||
{
|
||||
if (im->data)
|
||||
free(im->data);
|
||||
if (!ok) {
|
||||
if (im->data) free(im->data);
|
||||
im->data = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if (plane[0])
|
||||
free(plane[0]);
|
||||
if (plane[0]) free(plane[0]);
|
||||
|
||||
free(bmhd.data);
|
||||
if (camg.data)
|
||||
free(camg.data);
|
||||
if (cmap.data)
|
||||
free(cmap.data);
|
||||
if (body.data)
|
||||
free(body.data);
|
||||
freeilbm(&ilbm);
|
||||
|
||||
return (cancel) ? 2 : ok;
|
||||
return (cancel)? 2: ok;
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------------------------------
|
||||
* Does nothing. Perhaps save only in 24-bit format?
|
||||
* Perhaps save only in 32-bit format? The IFF ILBM format has pretty much gone
|
||||
* the way of the Amiga, who saves in this format any more?
|
||||
*------------------------------------------------------------------------------*/
|
||||
char
|
||||
save(ImlibImage * im, ImlibProgressFunction progress, char progress_granularity)
|
||||
#if 0
|
||||
char save(ImlibImage *im, ImlibProgressFunction progress, char progress_granularity)
|
||||
{
|
||||
return 0;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*------------------------------------------------------------------------------
|
||||
* Identifies the file extensions this loader handles. Standard code from other
|
||||
* loaders.
|
||||
*------------------------------------------------------------------------------*/
|
||||
void
|
||||
formats(ImlibLoader * l)
|
||||
void formats(ImlibLoader *l)
|
||||
{
|
||||
char *list_formats[] = { "iff", "ilbm", "lbm" };
|
||||
int i;
|
||||
char *list_formats[] = { "iff", "ilbm", "lbm" };
|
||||
int i;
|
||||
|
||||
l->num_formats = sizeof(list_formats) / sizeof(list_formats[0]);
|
||||
l->formats = malloc(l->num_formats * sizeof(list_formats[0]));
|
||||
for (i = 0; i < l->num_formats; i++)
|
||||
l->formats[i] = strdup(list_formats[i]);
|
||||
l->num_formats = sizeof(list_formats) / sizeof(list_formats[0]);
|
||||
l->formats = malloc(l->num_formats * sizeof(list_formats[0]));
|
||||
for (i = 0; i < l->num_formats; i++) l->formats[i] = strdup(list_formats[i]);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue