X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture3d.cpp;h=36afa9bcdfe9b3fc2dc1e72c5ef8d19bce06f8aa;hb=9b430dbef4f58a862320ebfcef7d1f8bff28b0dc;hp=5c9f009c0d5eb6d798a06b9a64fd783341430e38;hpb=49323eea600fb989d4181ccfd437ee12722ae733;p=libs%2Fgl.git

diff --git a/source/texture3d.cpp b/source/texture3d.cpp
index 5c9f009c..36afa9bc 100644
--- 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)
@@ -67,6 +78,9 @@ void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void
 	unsigned d = depth;
 	get_level_size(level, w, h, d);
 
+	if(ARB_texture_storage)
+		return sub_image(level, 0, 0, 0, w, h, d, fmt, type, data);
+
 	BindRestore _bind(this);
 	glTexImage3D(target, level, ifmt, width, height, depth, 0, fmt, type, data);
 
@@ -74,8 +88,7 @@ void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void
 	if(gen_mipmap && level==0)
 	{
 		auto_generate_mipmap();
-		for(; (w || h || d); w>>=1, h>>=1, d>>=1, ++level) ;
-		allocated |= (1<<level)-1;
+		allocated |= (1<<get_n_levels())-1;
 	}
 }
 
@@ -84,10 +97,13 @@ void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsi
 	if(width==0 || height==0 || depth==0)
 		throw invalid_operation("Texture3D::image");
 
+	BindRestore _bind(this);
 	allocate(level);
 
-	BindRestore _bind(this);
 	glTexSubImage3D(target, level, x, y, z, wd, ht, dp, fmt, type, data);
+
+	if(gen_mipmap && level==0)
+		auto_generate_mipmap();
 }
 
 void Texture3D::load_image(const string &fn, int dp)
@@ -169,7 +185,17 @@ void Texture3D::image(const Graphics::Image &img, bool srgb)
 	image(0, fmt, UNSIGNED_BYTE, img.get_data());
 }
 
-void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d)
+unsigned Texture3D::get_n_levels() const
+{
+	unsigned s = max(width, height);
+	if(target!=GL_TEXTURE_2D_ARRAY)
+		s = max(s, depth);
+	unsigned n = 0;
+	for(; s; s>>=1, ++n) ;
+	return n;
+}
+
+void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d) const
 {
 	w >>= level;
 	h >>= level;