raze-gles/polymer/build/src/hightile.c

/*
 * High-colour textures support for Polymost
 * by Jonathon Fowler
 * See the included license file "BUILDLIC.TXT" for license info.
 */

#include "kplib.h"

#define HICEFFECTMASK (1|2)
static palette_t hictinting[MAXPALOOKUPS];

struct hicskybox_t {
	long ignore;
	char *face[6];
};
typedef struct hicreplc_t {
	struct hicreplc_t *next;
	char palnum, ignore, flags, filler;
	char *filename;
	float alphacut;
	struct hicskybox_t *skybox;
} hicreplctyp;
static hicreplctyp *hicreplc[MAXTILES];
static char hicfirstinit = 0;

//
// find the index into hicreplc[] which contains the replacement tile particulars
//
static hicreplctyp * hicfindsubst(long picnum, long palnum, long skybox)
{
	hicreplctyp *hr;

	if (!hicfirstinit) return NULL;
	if ((unsigned long)picnum >= (unsigned long)MAXTILES) return NULL;

	do {
		for (hr = hicreplc[picnum]; hr; hr = hr->next) {
			if (hr->palnum == palnum) {
				if (skybox) {
					if (hr->skybox && !hr->skybox->ignore) return hr;
				} else {
					if (!hr->ignore) return hr;
				}
			}
		}

		if (!palnum) break;
		palnum = 0;
	} while (1);

	return NULL;	// no replacement found
}


//
// hicinit()
//   Initialise the high-colour stuff to default.
//
void hicinit(void)
{
	long i,j;
	hicreplctyp *hr, *next;
	
	for (i=0;i<MAXPALOOKUPS;i++) {	// all tints should be 100%
		hictinting[i].r = hictinting[i].g = hictinting[i].b = 0xff;
		hictinting[i].f = 0;
	}

	if (hicfirstinit)
	for (i=MAXTILES-1;i>=0;i--) {
		for (hr=hicreplc[i]; hr; ) {
			next = hr->next;

			if (hr->skybox) {
				for (j=5;j>=0;j--) {
					if (hr->skybox->face[j]) {
						free(hr->skybox->face[j]);
					}
				}
				free(hr->skybox);
			}
			if (hr->filename) free(hr->filename);
			free(hr);

			hr = next;
		}
	}
	memset(hicreplc,0,sizeof(hicreplc));
	
	hicfirstinit = 1;
}


//
// hicsetpalettetint(pal,r,g,b,effect)
//   The tinting values represent a mechanism for emulating the effect of global sector
//   palette shifts on true-colour textures and only true-colour textures.
//   effect bitset: 1 = greyscale, 2 = invert
//
void hicsetpalettetint(long palnum, unsigned char r, unsigned char g, unsigned char b, unsigned char effect)
{
	if ((unsigned long)palnum >= (unsigned long)MAXPALOOKUPS) return;
	if (!hicfirstinit) hicinit();

	hictinting[palnum].r = r;
	hictinting[palnum].g = g;
	hictinting[palnum].b = b;
	hictinting[palnum].f = effect & HICEFFECTMASK;
}


//
// hicsetsubsttex(picnum,pal,filen,alphacut)
//   Specifies a replacement graphic file for an ART tile.
//
int hicsetsubsttex(long picnum, long palnum, char *filen, float alphacut, char flags)
{
	hicreplctyp *hr, *hrn;

	if ((unsigned long)picnum >= (unsigned long)MAXTILES) return -1;
	if ((unsigned long)palnum >= (unsigned long)MAXPALOOKUPS) return -1;
	if (!hicfirstinit) hicinit();

	for (hr = hicreplc[picnum]; hr; hr = hr->next) {
		if (hr->palnum == palnum)
			break;
	}

	if (!hr) {
		// no replacement yet defined
		hrn = (hicreplctyp *)calloc(1,sizeof(hicreplctyp));
		if (!hrn) return -1;
		hrn->palnum = palnum;
	} else hrn = hr;

	// store into hicreplc the details for this replacement
	if (hrn->filename) free(hrn->filename);

	hrn->filename = strdup(filen);
	if (!hrn->filename) {
		if (hrn->skybox) return -1;	// don't free the base structure if there's a skybox defined
		if (hr == NULL) free(hrn);	// not yet a link in the chain
		return -1;
	}
	hrn->ignore = 0;
	hrn->alphacut = min(alphacut,1.0);
	hrn->flags = flags;
	if (hr == NULL) {
		hrn->next = hicreplc[picnum];
		hicreplc[picnum] = hrn;
	}

	//printf("Replacement [%d,%d]: %s\n", picnum, palnum, hicreplc[i]->filename);

	return 0;
}


//
// hicsetskybox(picnum,pal,faces[6])
//   Specifies a graphic files making up a skybox.
//
int hicsetskybox(long picnum, long palnum, char *faces[6])
{
	hicreplctyp *hr, *hrn;
	long j;

	if ((unsigned long)picnum >= (unsigned long)MAXTILES) return -1;
	if ((unsigned long)palnum >= (unsigned long)MAXPALOOKUPS) return -1;
	for (j=5;j>=0;j--) if (!faces[j]) return -1;
	if (!hicfirstinit) hicinit();

	for (hr = hicreplc[picnum]; hr; hr = hr->next) {
		if (hr->palnum == palnum)
			break;
	}

	if (!hr) {
		// no replacement yet defined
		hrn = (hicreplctyp *)calloc(1,sizeof(hicreplctyp));
		if (!hrn) return -1;

		hrn->palnum = palnum;
	} else hrn = hr;
	
	if (!hrn->skybox) {
		hrn->skybox = (struct hicskybox_t *)calloc(1,sizeof(struct hicskybox_t));
		if (!hrn->skybox) {
			if (hr == NULL) free(hrn);	// not yet a link in the chain
			return -1;
		}
	} else {
		for (j=5;j>=0;j--) {
			if (hrn->skybox->face[j])
				free(hrn->skybox->face[j]);
		}
	}	

	// store each face's filename
	for (j=0;j<6;j++) {
		hrn->skybox->face[j] = strdup(faces[j]);
		if (!hrn->skybox->face[j]) {
			for (--j; j>=0; --j)	// free any previous faces
				free(hrn->skybox->face[j]);
			free(hrn->skybox);
			hrn->skybox = NULL;
			if (hr == NULL) free(hrn);
			return -1;
		}
	}
	hrn->skybox->ignore = 0;
	if (hr == NULL) {
		hrn->next = hicreplc[picnum];
		hicreplc[picnum] = hrn;
	}

	return 0;
}


//
// hicclearsubst(picnum,pal)
//   Clears a replacement for an ART tile, including skybox faces.
//
int hicclearsubst(long picnum, long palnum)
{
	hicreplctyp *hr, *hrn = NULL;

	if ((unsigned long)picnum >= (unsigned long)MAXTILES) return -1;
	if ((unsigned long)palnum >= (unsigned long)MAXPALOOKUPS) return -1;
	if (!hicfirstinit) return 0;

	for (hr = hicreplc[picnum]; hr; hrn = hr, hr = hr->next) {
		if (hr->palnum == palnum)
			break;
	}

	if (!hr) return 0;

	if (hr->filename) free(hr->filename);
	if (hr->skybox) {
		int i;
		for (i=5;i>=0;i--)
			if (hr->skybox->face[i])
				free(hr->skybox->face[i]);
		free(hr->skybox);
	}

	if (hrn) hrn->next = hr->next;
	else hicreplc[picnum] = hr->next;
	free(hr);

	return 0;
}