void
build_tileset(const path_t* path, const image_t* image, int tile_width, int tile_height)
{
FILE* file;
ptrdiff_t pitch;
const uint32_t* pixelbuf;
struct rts_header rts;
struct rts_tile_header tile;
int x, y;
int i_y;
uint16_t i;
memset(&rts, 0, sizeof(struct rts_header));
memcpy(&rts.signature, ".rts", 4);
rts.version = 1;
rts.num_tiles = (image_get_width(image) / tile_width) * (image_get_height(image) / tile_height);
rts.has_obstructions = 0;
rts.tile_width = (uint16_t)tile_width;
rts.tile_height = (uint16_t)tile_height;
rts.tile_bpp = 32;
file = fopen(path_cstr(path), "wb");
fwrite(&rts, sizeof(struct rts_header), 1, file);
pitch = image_get_pitch(image);
x = 0; y = 0;
for (i = 0; i < rts.num_tiles; ++i) {
for (i_y = 0; i_y < tile_height; ++i_y) {
pixelbuf = image_get_pixelbuf(image) + x + (y + i_y) * pitch;
fwrite(pixelbuf, tile_width * 4, 1, file);
}
if ((x += tile_width) + tile_width > image_get_width(image)) {
x = 0;
y += tile_height;
}
}
memset(&tile, 0, sizeof(struct rts_tile_header));
for (i = 0; i < rts.num_tiles; ++i)
fwrite(&tile, sizeof(struct rts_tile_header), 1, file);
fclose(file);
}
source source::from_file(StringSlice path) {
String path_cstr(c_str(path));
return source(std::unique_ptr<pullable>(file_pullable::open((char const *)path_cstr.begin())));
}
