terom@18: #include "tile.h"
terom@18: #include "error.h"
terom@18: #include "shared/log.h" // only FATAL
terom@18: 
terom@18: #include <stdlib.h>
terom@56: #include <assert.h>
terom@56: 
terom@56: int pt_tile_mem_write (struct pt_tile_mem *buf, void *data, size_t len)
terom@56: {
terom@56:     size_t buf_len = buf->len;
terom@56: 
terom@56:     // grow?
terom@56:     while (buf->off + len > buf_len)
terom@56:         buf_len *= 2;
terom@56: 
terom@56:     if (buf_len != buf->len) {
terom@56:         char *tmp;
terom@56: 
terom@56:         if ((tmp = realloc(buf->base, buf_len)) == NULL)
terom@56:             RETURN_ERROR(PT_ERR_MEM);
terom@56: 
terom@56:         buf->base = tmp;
terom@56:         buf->len = buf_len;
terom@56:     }
terom@56: 
terom@56:     // copy
terom@56:     memcpy(buf->base + buf->off, data, len);
terom@56: 
terom@56:     buf->off += len;
terom@56:     
terom@56:     return 0;
terom@56: }
terom@56: 
terom@18: 
terom@19: int pt_tile_new (struct pt_tile **tile_ptr)
terom@18: {
terom@19:     struct pt_tile *tile;
terom@19: 
terom@19:     if ((tile = calloc(1, sizeof(*tile))) == NULL)
terom@19:         return -PT_ERR_MEM;
terom@19: 
terom@19:     *tile_ptr = tile;
terom@19: 
terom@19:     return 0;
terom@19: }
terom@19: 
terom@19: static void pt_tile_init (struct pt_tile *tile, struct pt_cache *cache, const struct pt_tile_info *info, enum pt_tile_output out_type)
terom@19: {
terom@18:     // init
terom@19:     tile->cache = cache;
terom@18:     tile->info = *info;
terom@18:     tile->out_type = out_type;
terom@18: }
terom@18: 
terom@19: int pt_tile_init_file (struct pt_tile *tile, struct pt_cache *cache, const struct pt_tile_info *info, FILE *out)
terom@18: {
terom@19:     pt_tile_init(tile, cache, info, PT_TILE_OUT_FILE);
terom@18: 
terom@18:     tile->out.file = out;
terom@18: 
terom@18:     return 0;
terom@18: }
terom@18: 
terom@19: int pt_tile_init_mem (struct pt_tile *tile, struct pt_cache *cache, const struct pt_tile_info *info)
terom@18: {
terom@19:     pt_tile_init(tile, cache, info, PT_TILE_OUT_MEM);
terom@18:     
terom@18:     // init buffer
terom@18:     if ((tile->out.mem.base = malloc(PT_TILE_BUF_SIZE)) == NULL)
terom@18:         RETURN_ERROR(PT_ERR_MEM);
terom@18: 
terom@18:     tile->out.mem.len = PT_TILE_BUF_SIZE;
terom@18:     tile->out.mem.off = 0;
terom@18: 
terom@18:     return 0;
terom@18: }
terom@18: 
terom@18: 
terom@19: int pt_tile_render (struct pt_tile *tile)
terom@18: {
terom@86:     // validate dimensions
terom@86:     if (!tile->info.width || !tile->info.height)
terom@86:         RETURN_ERROR(PT_ERR_TILE_DIM);
terom@86: 
terom@56:     return pt_cache_tile(tile->cache, tile);
terom@18: }
terom@18: 
terom@18: void pt_tile_abort (struct pt_tile *tile)
terom@18: {
terom@18:     // cleanup
terom@18:     switch (tile->out_type) {
terom@18:         case PT_TILE_OUT_FILE:
terom@18:             // no-op
terom@18:             break;
terom@18: 
terom@18:         case PT_TILE_OUT_MEM:
terom@18:             // drop buffer
terom@18:             free(tile->out.mem.base);
terom@18: 
terom@18:             break;
terom@18:     }
terom@18: }
terom@18: 
terom@19: void pt_tile_destroy (struct pt_tile *tile)
terom@19: {
terom@19:     pt_tile_abort(tile);
terom@19: 
terom@19:     free(tile);
terom@19: }
terom@21: