img->currenty += yval;
img->currentx = xval;
} else {
- count = 0;
-/*
+ if (fread(&yval, sizeof yval, 1, img->f) != 1) goto readerr;
+ yval = letohs(yval); img->foff += sizeof yval;
+
+ /* FIXME Still have to figure out what to do here. */
+
count = type;
+
if (count > img->width - img->currentx) {
lbx_errno = LBX_EFORMAT;
return -1;
}
-*/
}
pos = &img->framedata[img->currenty][img->currentx];
return img->framedata;
}
+int lbximg_loadpalette(FILE *f, struct lbx_colour palette[static 256])
+{
+ uint8_t entry[4];
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ if (fread(entry, sizeof entry, 1, f) != 1) {
+ lbx_errno = (feof(f)) ? LBX_EEOF : -errno;
+ return -1;
+ }
+
+ if (entry[0] != 1) {
+ lbx_errno = LBX_EFORMAT;
+ return -1;
+ }
+
+ palette[i] = (struct lbx_colour){
+ .red = entry[1] << 2,
+ .green = entry[2] << 2,
+ .blue = entry[3] << 2,
+ };
+ }
+
+ return 0;
+}
+
+int
+lbximg_getpalette(struct lbx_image *img, struct lbx_colour palette[static 256])
+{
+ int index = 0;
+ size_t rc;
+ size_t hdrlen = 6*(sizeof img->width)
+ + (img->offs)*(sizeof *img->offsets);
+
+ uint8_t entry[4];
+
+ /* Palette data is located right after the header. */
+ if (_lbx_fseek(img->f, &img->foff, hdrlen) == -1)
+ return -1;
+
+ while (img->foff + sizeof entry <= img->offsets[0]) {
+ rc = fread(entry, 1, sizeof entry, img->f);
+ img->foff += rc;
+
+ if (rc < sizeof entry) {
+ goto readerr;
+ }
+
+ if (entry[0] == 0) {
+ index++;
+ } else {
+ index = entry[0];
+ }
+
+ palette[index] = (struct lbx_colour){
+ .red = entry[1] << 2,
+ .green = entry[2] << 2,
+ .blue = entry[3] << 2,
+ };
+ }
+
+ return 0;
+readerr:
+ if (feof(img->f))
+ lbx_errno = LBX_EEOF;
+ else
+ lbx_errno = -errno;
+ return -1;
+}
+
void lbximg_close(struct lbx_image *img)
{
if (!img) return;
typedef struct lbx_image LBXIMG;
+struct lbx_colour {
+ unsigned char red;
+ unsigned char green;
+ unsigned char blue;
+};
+
LBXIMG *lbximg_fopen(FILE *f);
void lbximg_close(LBXIMG *img);
unsigned char **lbximg_getframe(LBXIMG *img, int frame);
+int lbximg_loadpalette(FILE *f, struct lbx_colour palette[static 256]);
+int lbximg_getpalette(LBXIMG *img, struct lbx_colour palette[static 256]);
+
#endif