1 files changed, 10 insertions, 2 deletions

diff --git a/bmp.h b/bmp.h
index e9b2821..89ab893 100644
--- a/bmp.h
+++ b/bmp.h
@@ -6,7 +6,15 @@
 
 #include "color.h"
 
-extern int bmp_write_header(FILE* fh, int32_t width, int32_t height);
-extern int bmp_write_pixel(FILE* fh, color_t col);
+typedef struct {
+	int32_t width, height;
+	size_t line_padding;
+	size_t line_left;
+	FILE* fh;
+} bmp_write_handle_t;
+
+extern bmp_write_handle_t* bmp_create(const char* fn, int32_t width, int32_t height);
+extern int bmp_write_pixel(bmp_write_handle_t* bmph, color_t col);
+extern void bmp_destroy(bmp_write_handle_t* bmph);
 
 #endif
\ No newline at end of file