1 files changed, 30 insertions, 0 deletions

diff --git a/src/ui/visbuf.h b/src/ui/visbuf.h
new file mode 100644
index 00000000..80370b29
--- /dev/null
+++ b/src/ui/visbuf.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <the_Foundation/range.h>
+#include <the_Foundation/vec2.h>
+#include <SDL_render.h>
+
+iDeclareType(VisBuf)
+iDeclareType(VisBufTexture)
+
+struct Impl_VisBufTexture {
+    SDL_Texture *texture;
+    int origin;
+    iRangei validRange;
+};
+
+struct Impl_VisBuf {
+    iInt2 texSize;
+    iRangei vis;
+    iVisBufTexture buffers[3];
+};
+
+iDeclareTypeConstruction(VisBuf)
+
+void    invalidate_VisBuf       (iVisBuf *);
+void    alloc_VisBuf            (iVisBuf *, const iInt2 size, int granularity);
+void    dealloc_VisBuf          (iVisBuf *);
+void    reposition_VisBuf       (iVisBuf *, const iRangei vis);
+
+void    invalidRanges_VisBuf    (const iVisBuf *, const iRangei full, iRangei *out_invalidRanges);
+void    draw_VisBuf             (const iVisBuf *, iInt2 topLeft);