X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture2d.cpp;h=c92099cedb35e79c362ab6cab25acd0d7359bd25;hb=aa9884e69bc543682d1fe36ec5d054fdf11bcfac;hp=8935933f995117322069ad1652b6b1d9ffc87d0c;hpb=7e9e15a12fb398798f2719545cc8553354c1e389;p=libs%2Fgl.git

diff --git a/source/texture2d.cpp b/source/texture2d.cpp
index 8935933f..c92099ce 100644
--- a/source/texture2d.cpp
+++ b/source/texture2d.cpp
@@ -17,10 +17,11 @@ namespace GL {
 Texture2D::Texture2D():
 	Texture(GL_TEXTURE_2D),
 	width(0),
-	height(0)
+	height(0),
+	allocated(0)
 { }
 
-void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht, int brd)
+void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht)
 {
 	if(width>0)
 		throw InvalidState("Texture storage may only be specified once");
@@ -30,22 +31,39 @@ void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht, int brd)
 	ifmt = fmt;
 	width = wd;
 	height = ht;
-	border = brd;
 }
 
-void Texture2D::image(int level, PixelFormat fmt, DataType type, const void *data)
+void Texture2D::allocate(unsigned level)
 {
-	if(width==0)
-		throw InvalidState("Texture storage has not been specified");
+	if(allocated&(1<<level))
+		return;
+
+	image(level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
+}
+
+void Texture2D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
+{
+	require_storage();
+
+	unsigned w = width;
+	unsigned h = height;
+	get_level_size(level, w, h);
 
 	Bind _bind(this, true);
-	glTexImage2D(target, level, ifmt, width, height, border, fmt, type, data);
+	glTexImage2D(target, level, ifmt, w, h, 0, fmt, type, data);
+
+	allocated |= 1<<level;
+	if(gen_mipmap && level==0)
+	{
+		for(; (w || h); w>>=1, h>>=1, ++level) ;
+		allocated |= (1<<level)-1;
+	}
 }
 
-void Texture2D::sub_image(int level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
+void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
 {
-	if(width==0)
-		throw InvalidState("Texture storage has not been specified");
+	require_storage();
+	allocate(level);
 
 	Bind _bind(this, true);
 	glTexSubImage2D(target, level, x, y, wd, ht, fmt, type, data);
@@ -65,13 +83,30 @@ void Texture2D::image(const Graphics::Image &img)
 	unsigned h = img.get_height();
 	PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 	if(width==0)
-		storage(fmt, w, h, 0);
+		storage(fmt, w, h);
 	else if(w!=width || h!=height)
 		throw IncompatibleData("Image does not match texture storage");
 
 	image(0, fmt, UNSIGNED_BYTE, img.get_data());
 }
 
+void Texture2D::require_storage()
+{
+	if(width==0 || height==0)
+		throw InvalidState("Texture storage has not been specified");
+}
+
+void Texture2D::get_level_size(unsigned level, unsigned &w, unsigned &h)
+{
+	w >>= level;
+	h >>= level;
+
+	if(!w && h)
+		w = 1;
+	else if(!h && w)
+		h = 1;
+}
+
 
 Texture2D::Loader::Loader(Texture2D &t):
 	Texture::Loader(t)
@@ -79,6 +114,7 @@ Texture2D::Loader::Loader(Texture2D &t):
 	add("image_data", &Loader::image_data);
 	add("raw_data", &Loader::raw_data);
 	add("storage", &Loader::storage);
+	add("storage", &Loader::storage_b);
 }
 
 void Texture2D::Loader::image_data(const string &data)
@@ -95,9 +131,14 @@ void Texture2D::Loader::raw_data(const string &data)
 	t2d.image(0, t2d.ifmt, UNSIGNED_BYTE, data.data());
 }
 
-void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned b)
+void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h)
+{
+	static_cast<Texture2D &>(obj).storage(fmt, w, h);
+}
+
+void Texture2D::Loader::storage_b(PixelFormat fmt, unsigned w, unsigned h, unsigned)
 {
-	static_cast<Texture2D &>(obj).storage(fmt, w, h, b);
+	storage(fmt, w, h);
 }
 
 } // namespace GL