X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture2d.cpp;h=4d6e32f5550cd6f48ee68c71d957278b7ffe355e;hb=6f8c0c6c088be92804cb413c0234bfb817ef2d8d;hp=4d3dac037291137856d28a77926e9517ac9475de;hpb=49323eea600fb989d4181ccfd437ee12722ae733;p=libs%2Fgl.git

diff --git a/source/texture2d.cpp b/source/texture2d.cpp
index 4d3dac03..4d6e32f5 100644
--- a/source/texture2d.cpp
+++ b/source/texture2d.cpp
@@ -1,3 +1,4 @@
+#include <msp/gl/extensions/arb_texture_storage.h>
 #include "bindable.h"
 #include "buffer.h"
 #include "error.h"
@@ -65,8 +66,18 @@ void Texture2D::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);
+		glTexStorage2D(target, n_levels, ifmt, width, height);
+		allocated |= (1<<n_levels)-1;
+	}
+	else
+	{
+		PixelFormat base_fmt = get_base_pixelformat(ifmt);
+		image(level, base_fmt, get_alloc_type(base_fmt), 0);
+	}
 }
 
 void Texture2D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
@@ -79,14 +90,16 @@ void Texture2D::image(unsigned level, PixelFormat fmt, DataType type, const void
 	get_level_size(level, w, h);
 
 	BindRestore _bind(this);
+	if(ARB_texture_storage)
+		return sub_image(level, 0, 0, w, h, fmt, type, data);
+
 	glTexImage2D(target, level, ifmt, w, h, 0, fmt, type, data);
 
 	allocated |= 1<<level;
 	if(gen_mipmap && level==0)
 	{
 		auto_generate_mipmap();
-		for(; (w || h); w>>=1, h>>=1, ++level) ;
-		allocated |= (1<<level)-1;
+		allocated |= (1<<get_n_levels())-1;
 	}
 }
 
@@ -99,6 +112,9 @@ void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht
 
 	BindRestore _bind(this);
 	glTexSubImage2D(target, level, x, y, wd, ht, fmt, type, data);
+
+	if(gen_mipmap && level==0)
+		auto_generate_mipmap();
 }
 
 void Texture2D::image(const Graphics::Image &img, bool srgb)
@@ -122,7 +138,14 @@ void Texture2D::image(const Graphics::Image &img, bool srgb, bool from_buffer)
 	image(0, fmt, UNSIGNED_BYTE, from_buffer ? 0 : img.get_data());
 }
 
-void Texture2D::get_level_size(unsigned level, unsigned &w, unsigned &h)
+unsigned Texture2D::get_n_levels() const
+{
+	unsigned n = 0;
+	for(unsigned s=max(width, height); s; s>>=1, ++n) ;
+	return n;
+}
+
+void Texture2D::get_level_size(unsigned level, unsigned &w, unsigned &h) const
 {
 	w >>= level;
 	h >>= level;