Use ARB_texture_storage for defining texture storage

[libs/gl.git] / source / texture3d.cpp

diff --git a/source/texture3d.cpp b/source/texture3d.cpp
index 12fc856b8415d4e9cc18ac95c2a9c548a79cf79f..d04a17e1fbb38bf81c507f9798406f75ca3b2942 100644 (file)
--- a/source/texture3d.cpp
+++ b/source/texture3d.cpp
@@ -1,4 +1,5 @@
 #include <cmath>
+#include <msp/gl/extensions/arb_texture_storage.h>
 #include <msp/gl/extensions/ext_texture3d.h>
 #include <msp/graphics/image.h>
 #include "bindable.h"
@@ -53,8 +54,18 @@ void Texture3D::allocate(unsigned level)
        if(allocated&(1<<level))
                return;
 
-       PixelFormat base_fmt = get_base_pixelformat(ifmt);
-       image(level, base_fmt, get_alloc_type(base_fmt), 0);
+       if(ARB_texture_storage)
+       {
+               BindRestore _bind(this);
+               unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
+               glTexStorage3D(target, n_levels, ifmt, width, height, depth);
+               allocated |= (1<<n_levels)-1;
+       }
+       else
+       {
+               PixelFormat base_fmt = get_base_pixelformat(ifmt);
+               image(level, base_fmt, get_alloc_type(base_fmt), 0);
+       }
 }
 
 void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
@@ -68,7 +79,10 @@ void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void
        get_level_size(level, w, h, d);
 
        BindRestore _bind(this);
-       glTexImage3D(target, level, ifmt, width, height, depth, 0, fmt, type, data);
+       if(ARB_texture_storage)
+               sub_image(level, 0, 0, 0, w, h, d, fmt, type, data);
+       else
+               glTexImage3D(target, level, ifmt, width, height, depth, 0, fmt, type, data);
 
        allocated |= 1<<level;
        if(gen_mipmap && level==0)