feature: new cdr format

2 files changed, 61 insertions, 7 deletions

diff --git a/other/format_v2 b/other/format_v2
new file mode 100644
index 0000000..6b129bd
--- /dev/null
+++ b/other/format_v2
@@ -0,0 +1,5 @@
+VERSION NUMBER;
+WIDTH;HEIGHT;
+LAYER_CNT;
+LAYER_NAME;...
+CANVAS DATA(4*H*W*LC bytes)
diff --git a/src/canvas.c b/src/canvas.c
index 927bde1..9807c26 100644
--- a/src/canvas.c
+++ b/src/canvas.c
@@ -27,6 +27,8 @@ static void     canvas_set_proj_path(Canvas *, const char *);
 static void     action_do(Canvas *);
 static void     action_remove(Action *);
 static void     action_pixcols_redo(Canvas *, Action *);
+static Canvas  *canvas_open1(FILE *, void *);
+static Canvas  *canvas_open2(FILE *, void *);
 
 static uint8
 canvas_coord_get(Canvas *c, long int tx, long int ty, long int *x, long int *y)
@@ -135,21 +137,62 @@ canvas_init(uint w, uint h, void *ren)
 Canvas *
 canvas_open(const char *path, void *ren)
 {
-	int ver, w, h;
-	Canvas *c;
+	unsigned int ver;
+	Canvas *c = NULL;
 	FILE *fp = fopen(path, "r");
 	if (fp == NULL) return NULL;
-	fscanf(fp, "%d;%d;%d;", &ver, &w, &h);
-	c = canvas_init(w, h, ren);
-	fread(c->layers[0]->pix, sizeof *(c->layers[0]->pix), c->w*c->h, fp);
+	fscanf(fp, "%u;", &ver);
+	switch (ver) {
+	case 1: c = canvas_open1(fp, ren); break;
+	case 2: c = canvas_open2(fp, ren); break;
+	default:
+			fprintf(stderr, "Error opening file. Unkown version %u.", ver);
+			break;
+	}
+
 	fclose(fp);
 
+	if (c == NULL) return NULL;
 	canvas_refresh(c);
 	canvas_set_proj_path(c, path);
 
 	return c;
 }
 
+static Canvas *
+canvas_open1(FILE *fp, void *ren)
+{
+	unsigned int w, h;
+	Canvas *c;
+	fscanf(fp, "%u;%u;", &w, &h);
+	c = canvas_init(w, h, ren);
+	fread(c->layers[0]->pix, sizeof *(c->layers[0]->pix), c->w*c->h, fp);
+
+	return c;
+}
+
+static Canvas *
+canvas_open2(FILE *fp, void *ren)
+{
+	unsigned int w, h, lc, i;
+	Canvas *c;
+	fscanf(fp, "%u;%u;%u;", &w, &h, &lc);
+	puts("READING DATA");
+	c = canvas_init(w, h, ren);
+	for (i = 1; i < lc; i++)
+		canvas_add_layer(c, lc);
+	for (i = 0; i < lc; i++) {
+		fread(c->layers[i]->name, sizeof *(c->layers[i]->name), LAYERNAMELEN, fp);
+		c->layers[i]->name[LAYERNAMELEN] = '\0';
+		fscanf(fp, ";");
+	}
+
+	for (i = 0; i < lc; i++)
+		fread(c->layers[i]->pix, sizeof *(c->layers[i]->pix), c->w*c->h, fp);
+
+	return c;
+}
+
 Canvas *
 canvas_import_png(const char *path, void *ren)
 {
@@ -378,14 +421,20 @@ canvas_move_y(Canvas *c, long int delta)
 uint8
 canvas_save(Canvas *c, const char *path, short int s)
 {
+	unsigned int i;
 	FILE *fp = fopen(path, "w");
 	if (fp == NULL) {
 		/* TODO: Error handling */
 		return 1;
 	}
 
-	fprintf(fp, "1;%d;%d;", c->w, c->h);
-	int u = fwrite(c->layers[0]->pix, sizeof *(c->layers[0]->pix), c->w*c->h, fp);
+	fprintf(fp, "2;%u;%u;%u;", c->w, c->h, c->layer_arr_cnt);
+	for (i = 0; i < c->layer_arr_cnt; i++) {
+		fwrite(c->layers[i]->name, sizeof *(c->layers[i]->name), LAYERNAMELEN, fp);
+		fprintf(fp, ";");
+	}
+	for (i = 0; i < c->layer_arr_cnt; i++)
+		fwrite(c->layers[i]->pix, sizeof *(c->layers[i]->pix), c->w*c->h, fp);
 	fclose(fp);
 	if (s)
 		canvas_set_proj_path(c, path);