Turn image and palette cache into c style dynamic interface

Instead of passing a bunch of function pointer and an opaque
pointer we make a real type and add a vtable pointer to it.
This means we can simplify all the canvas constructors, etc.

1 files changed, 2 insertions, 4 deletions

diff --git a/client/red_gdi_canvas.cpp b/client/red_gdi_canvas.cpp
index 8e50a066..e30845e8 100644
--- a/client/red_gdi_canvas.cpp
+++ b/client/red_gdi_canvas.cpp
@@ -81,10 +81,8 @@ void GDICanvas::set_mode(int width, int height, int depth)
     create_pixmap(width, height);
     if (!(_canvas = gdi_canvas_create(_pixmap->get_dc(),
                                       &_pixmap->get_mutex(),
-                                      depth, &pixmap_cache(), bits_cache_put,
-                                      bits_cache_get, &palette_cache(),
-                                      palette_cache_put, palette_cache_get,
-                                      palette_cache_release,
+                                      depth, &pixmap_cache().base,
+                                      &palette_cache().base,
                                       &glz_decoder(),
                                       glz_decode))) {
         THROW("create canvas failed");