Drop Id tags and copyright notices from files

[libs/gl.git] / source / texture2d.cpp

diff --git a/source/texture2d.cpp b/source/texture2d.cpp
index 8935933f995117322069ad1652b6b1d9ffc87d0c..b6b5954837c2e8b2ca4d35a801bd28f199e75757 100644 (file)
--- a/source/texture2d.cpp
+++ b/source/texture2d.cpp
@@ -1,10 +1,3 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include "bindable.h"
 #include "except.h"
 #include "texture2d.h"
@@ -17,10 +10,11 @@ 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 +24,39 @@ 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 +76,30 @@ 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 +107,7 @@ 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 +124,14 @@ 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